Latest Research
Paspanguwa seems to be a trusted ancient homemade remedy in Sri Lanka used for common ailments like the common flu, influenza, fever, and aches and pains for hundreds of years. The name 'Paspanguwa' ('pas' = five, 'panguwa' = portions) which means five portions in the vernacular language of Sinhala, is made by the combination of five main herbs namely ‘ginger’ (Zingiber officinale), ‘Pathpadagam’ (Hedyotis corymbosa), 'Katuwalbatu'(Solanum xanthocarpum), ‘Venivalgata’ (Coscinium fenestratum) and Coriander (Coriandrum sativum). The results of this study suggest that the Paspanguwa herbal formula has a high amount of phenolic and flavonoid compounds and high antioxidant activities. The results also demonstrated that the Paspanguwa extract possesses a higher ability to inhibit protein denaturation which is strong evidence of the anti-inflammatory activity.
Madushani H.M.R., Jayawardena P.A.S.N.P and Kadigamuwa C.C.
Medicinal Plants - International Journal of Phytomedicines and Related Industries
Meranthi Fernando, Suchintha Tillakaratne, Bhagya Gunetilleke, Chamila Liyanage, Chinthaka Appuhamy, Aruna Weerasuriya, Buddhika Uragoda, Nadeeshya Welikala, Liyanage Ranaweera, Eranga Ganewatte, Janaki Dissanayake, Anushka Mudalige, Rohan Siriwardana
Pediatric Transplantation
Abstract:- https://doi.org/10.1111/petr.14681
ln this study, inverted PSCs were fabricated on stainless steel substrates with n-Cu2O as the ESTL. The n-Cu2O films were prepared by electrodeposition method, followed by annealing under ambient conditions. The active layer material was prepared as bulk heterojunction blend using regioregular P3HT and PCBM. PEDOT:PSS was used as the hole transport layer and the final device structure was SS/n-Cu2O/P3HT PCBM/PEDOT:PSS/Au. Annealing of the n-Cu2O ESTL in air was optimized observing the photoactive performance of the device. Optoelectronic performance of the devices was characterized using spectral response and dark and light current-voltage measurements. n-Cu2O ESTL - incorporated devices have absorbed more photons in the short wavelength region of 450-600 nm with the annealing of n-Cu2O ESTL due to the reduction of electron-hole recombination. The performance of the devices was significantly increased after incorporating pre-annealed n-Cu2O ESTL at 1750C for 30 min in air. The maximum power conversion efficiency was 0.35%.
W.T.M.A.P.K. Wanninayake, D.G.K.K. Namawardana,,R.M.G. Wanigasekara, K.M.D.C. Jayathilaka, R.P. Wijesundera, R.P. Wijesundera, W.P. Siripala, M.I. Malik
Journal of the National Science Foundation of Sri Lanka
Abstract:- https://doi.org/10.4038/jnsfsr.v51i2.11230
Polyaromatic hydrocarbons (PAHs) which cause many health issues, are released from vehicular emissions and oil refineries. They deposit on many plant surfaces including tea phyllosphere. Tea phyllosphere harbours a variety of endophytes that are highly effective at degrading polyaromatic hydrocarbons, anthracene, and pyrene. Hence the major objective of the present study is to analyse the pyrene and anthracene degrading capability of phyllosphere endophytic fungi that inhabit Camellia sinensis (L.) Kuntze leaves. Light microscopy and SEM observations highlighted a heterogeneous endophytic fungal distribution among leaf tissue layers. As per the HPLC results, Phyllosticta capitalensis, Colletotrichum gloeosporioides, Colletotrichum siamense, Pseudopestalotiopsis chinensis, and Daldinia eschscholtzii have higher pyrene and anthracene degradation capacities respectively and their PAH degradation kinetics follow the first-order kinetic model.
Lanka Undugoda, Kasun Thambugala, Sagarika Kannangara, Jayantha Munasinghe, Nadeeka Premarathna and Nadeema Dharmasiri
New Zealand Journal of Botany
This study aims to predict tourist arrivals in Sri Lanka by employing advanced machine learning (ML) models and incorporating social media data from platforms like TripAdvisor and Google Trends. The study compared three ML models (Support Vector Regression, Random Forest, and Artificial Neural Network) with a traditional Seasonal Auto-Regressive Integrated Moving Average (SARIMA) model, using historical tourist arrival data as features. The results indicate that ML models generally outperform SARIMA, especially during the turbulent period of 2019-2021 in Sri Lanka. When social media data is integrated, the Random Forest model stands out as the most effective, while the Support Vector Regression model shows less improvement. Although the Artificial Neural Network model doesn't outperform others with social media data, it proves adept at capturing data trends. This study is pioneering in its exploration of ML models and social media integration for predicting tourist arrivals in Sri Lanka, offering valuable insights for industry stakeholders to make informed decisions in the dynamic tourism sector.
I. U. Hewapathirana
Journal of Tourism Futures
Abstract:- https://doi.org/10.1108/JTF-06-2023-0149
Spot-billed Pelican (Pelecanus philippensis) is a near-threatened bird found only in South and Southeast Asia. Pelicans distributed in 14 lentic water bodies within the Colombo district and its minimum estimated population size was 193 individuals. Land-use patterns around the water body did not significantly impact the distribution of pelicans. However, its abunadance in foraging sites was positively related to the chlorophyll-a content of the water. As it is the flagship faunal species in Colombo, its conservation needs immediate action from relevant authorities.
Ayoma Senanee Weerasinghe & Udaya Priyantha Kankanamge Epa
Asian Journal of Conservation Biology
Abstract:- https://doi.org/10.53562/ajcb.78132
The Journal of Horticultural Science and Biotechnology
Abstract:- https://doi.org/10.1080/14620316.2023.2298987
Sustainability
Abstract:- https://doi.org/10.3390/su152014937
Employee engagement is currently in crisis. The study aimed to identify common methods and outcomes of employee engagement. The study identified common methods of employee engagement, including organizational identification and psychological empowerment. Various outcomes of employee engagement were also identified, such as organisational citizenship behavior, turnover intention, and the impact on employee health, stress, burnout, and satisfaction. The study used the Systematic Literature Review (SLR) methodology. The review included 260 studies published from 2008 to 2021. Different methods and outcomes of employee engagement were found. The review identified research gaps in employee engagement.
K. G. Priyashantha, A. Chamaru De Alwis and I. Welmilla
Sri Lanka Journal of Social Sciences
Abstract:- http://dx.doi.org/10.4038/sljss.v46i1.8613
Journal of Accounting in Emerging Economies
Abstract:- https://doi.org/10.1108/JAEE-10-2021-0308
Developing clinical procedural skills is essential to becoming a competent doctor. Simulation is identified as an effective way of developing these skills for medical professionals. This study investigated whether the skills acquired through simulation lasts a longer duration and whether students were able to apply the skills learnt through simulation-based training on actual patients.
Kaumudee Kodikara , Thilanka Seneviratne and Ranjan Premaratna
BMC Medical Education
Abstract:- https://doi.org/10.1186/s12909-023-04722-2
The massive tsunami waves in 2004 was an eye-opener for Sri Lanka and other island nations to assess the efficacy of existing coastal protection strategies. It was evident that hard engineering structures have failed to withstand the destructive forces of the tsunami wave but the patches of mangroves and the other coastal vegetation, comprised mainly of mangroves and Pandanus odoratissimus have resisted them. Vegetation structure is a salient factor that contributes to the reduction of the impact of natural disturbances. The current study highlights that mangrove parameters such as canopy, trunk, and complex root system and wave parameters such incident wave height and inundation distance play vital role in mangroves-induced wave attenuation. The mangrove plant communities comprised of Avicennia marina, Ceriops tagal, Excoecaria agallocha and, Rhizophora mucronata evidently, have served as natural coastal barriers and contribute to mitigate impacts of natural disturbances such as tsunamis and tropical storms.
Wasana de Silva , Mala Damayanthi Amarasinghe
Journal of Coastal Conservation
Abstract:- https://doi.org/10.1007/s11852-023-00990-8
This study assesses the relationship between arthropod and vegetation diversity in four ecosystems with different types of vegetation, during a post-monsoonal season.
This shows that higher plant diversity contributes to greater arthropod diversity in ecosystems where human intervention is minimal.
W. A. Manasee Weerathunga , A. M. Gihan Athapaththu , L. D. Amarasinghe
Scientifica
Abstract:- https://doi.org/10.1155/2023/7608236
The introduction of Sri Lanka’s Provincial Councils has been a part of the country’s efforts to decentralise its political, administrative and fiscal powers to the local governments since 1987. This study aims to quantify the effects of fiscal decentralisation on Sri Lanka’s service delivery using time series data from 1988 to 2018. This investigation employs the Autoregressive Distributed Lag (ARDL) modelling approach and uses a broad range of secondary data. According to these results, it may be concluded that sufficient fiscal decentralization has not taken place to provide the necessary funds to improve service delivery
Priyantha W. Mudalige, Saliya De Silva, N. S. Cooray
International Social Science Journal
Abstract:- https://doi.org/10.1111/issj.12402
Biofloc technology is based on carbon metabolism and nitrogen immobilizing microbial activities. Biofloc technology can be adopted to maintain water quality and enhance the production performance of guppy, Poecilia reticulata in zero-water exchange brackish water culture systems.
Liyanage Dilini Kaushalya Perera, Udaya Priyantha Kankanamge Epa
International Journal of Aquatic Biology
Abstract:- https://doi.org/10.22034/ijab.v11i4.1974
Sri Lanka, a biodiversity hotspot in Asia, records 30 Hedyotis species of which 25 species and a variety are endemic. Among these 25 species, seven Hedyotis species were categorized as critically endangered (CR), and 13 as endangered (EN). During our field survey in 2014, an extremely attractive plant belonging to the genus Hedyotis was discovered from Mount Thotupola, Sri Lanka. The plant was tentatively identified as H. quinquinervia. For accurate species identification, morphological characters were compared with voucher specimens, and identification keys were also used. In addition, DNA barcoding using the DNA sequence of the ITS region of the nuclear ribosomal DNA (rDNA-ITS) region was performed, followed by molecular phylogenetic analysis. A simple method to remove a thick cuticle layer on the leaves was employed to obtain a sufficient amount of DNA suitable for Polymerase Chain Reaction. A comparison with its protologue and type specimen along with molecular phylogenetic analysis confirmed that the unidentified plant was H. quinquinervia Thwaites. The National Red List of Sri Lanka (2020) had revised H. quinquinervia as a CR species upon the rediscovery confirmed after the lapse of a century. Habitat characteristics, ex situ and in situ conservation measures for H. quinquinervia, and general conservation strategies applicable to threatened heterostylous plants are also discussed.
A. Gunarathne, H. D. R. V. L. Harasgama, T. Wijewickrama, A. Attanayake, R. N. Attanayake and R. M. C. S. Ratnayake
Journal of National Science Foundation Sri Lanka
Abstract:- http://dx.doi.org/10.4038/jnsfsr.v51i3.11203
Coconut oil was extracted under cold and hot conditions. Hot conditions incorporate a richer phenolic profile, a higher α-tocopherol content, and a higher β-carotene content in coconut oil. Epimerization and hydrolysis of the phenolic compounds occur depending on the extraction conditions. The longest shelf-life of the coconut oil prepared under hot conditions may be due to the relatively lower contents of moisture, free acids, peroxides, and higher contents of phenolic compounds, α-tocopherol, and β-carotene in hot-extracted coconut oil. Contrary to popular belief, hot and wet extraction conditions may produce higher quality coconut oil compared to cold extraction conditions.
N. V. P. Anjali, C. Harshani Algama, Kaveesha P. Seneviratne, Chinthaka A. Seneviratne, Nimanthi Jayathilaka, Kapila N. Seneviratne
Journal of the American Oil Chemists' Society
Abstract:- https://doi.org/10.1002/aocs.12700
Maize is the second most important crop of Sri Lanka, and the annual maize production on the island is around 380,000 MT, whereas direct human consumption is estimated at over 50,000 MT. Fall armyworm (Spodoptera frugiperda) is a destructive pest for maize crop in Sri Lanka. Remote sensing is the acquisition of information about the earth's surface by measuring its reflected and emitted radiation at a distance. Based on the fact that crop canopies absorb and reflect incident radiation, healthy and stressed plants have different absorbance/reflectance characteristics that can be measured quantitatively and hence can be identified crop conditions. The present study revealed the wavelengths along with the optimum vegetation index, NDRE is the best to sense the severity of the fall armyworm damage.
Aruni Upeksha Dias Abeygunawardhana, Ransilu Chaminda Watawala, Primali Weerasinghe, Wasana de Silva
Agrociencia
Locally available aquatic plant, namely, Utricularia aurea is an ornamental plant used in fish tanks. This plant produces bladder warts to trap aquatic organisms including mosquito larvae. This was proven in laboratory-maintained fish tanks. Results revealed that this plant can be used as a competent predator of dengue vector, Aedes aegypti larvae.
Nayana Gunathilaka, Ravina Perera, Deepika Amarasinghe, Lahiru Udayanga
BMC Plant Biology
Abstract:- https://doi.org/10.1186/s12870-023-04454-x
International Journal of Knowledge-based and Intelligent Engineering Systems
Abstract:- https://doi.org/10.3233/kes-221516
In Sri Lanka, fish from at least 59 different species in 14 different families are traded in the ornamental fish industry. Of these, 48 species are native to tropical regions, and 11 species are native to subtropical regions. Six ornamental fish species already have established populations in the environment. Another 11 aquarium fish species have the potential to become invasive in Sri Lanka. Steps should be taken to stop releasing of aquarium fish into the natural environment.
U. P. K. Epa, M. G. M. U. Piyathissa, S. D. A. E. Ranasinghe, Y. G. Ranasinghe and R. M. K. H. Rathnayaka
Journal of Fisheries and Environment
Journal of Accounting in Emerging Economies
Abstract:- https://doi.org/10.1108/JAEE-08-2022-0224
Identification of parasitic, epibiont, pathogenic, competitive or predatory microbiota in larval habitats and their interactions with associated mosquito larvae, in terms of controlling agents, would be beneficial for potential larval-controlling approaches. The degree of such parasitic, pathogenic, or predatory effects may vary with the geographical location. During the present study, a total of eleven and eight microbiota species were identified from Aedes aegypti and Aedes albopictus breeding habitats respectively from Udapalatha MOH division. The relative distribution of microbiota associated with mosquito species differed significantly among the Aedes aegypti and Aedes albopictus revealing the relationship of microbiota abundance with different mosquito species which helps in implementing novel vector-control strategies in the study area in an ecofriendly manner.
J.Y. Kumari, L.D. Amarasinghe, H.A.K. Ranasinghe
Asian Pacific Journal of Tropical Medicine
Abstract:- https://doi.org/10.4103/1995-7645.380722
The purpose of the study is to examine the available literature to comprehend what the underground banking system is, for what purposes this method is used, and how policymakers should proceed to address this issue. The approach involved conducting this study and combining it with a critical analysis of the available literature as well as the available historical data. The sources the study has explored include government documents, public hearings, academic articles, case studies, and articles available on the Internet. The study revealed prevention of illegal proceeds is critical, still regulating one entity, is a phenomenon of Boyle's law, " squeezing the balloon ". If one end of the balloon is squeezed, making the volume smaller, the pressure inside increases, making the un-squeezed part of the balloon expand out. The real issue is not how criminals transfer their illegal earnings; it is the criminals themselves. Hence, the policy decision on this issue needs to be carefully considered.
Dinesh Sivaguru, Kamal Tilakasiri
Journal of Money Laundering Control
Abstract:- https://doi.org/10.1108/JMLC-05-2023-0084
A successful eco-friendly synthesis of AgNPs using T. longibrachaitum (Tl) and T. viride (Tv) extracellular extract as reducing and capping agents is achieved. Tv-AgNPs were found to be more efficient as larvicides than Tl-AgNPs, while A. albopictus vectors are more susceptible to both Tl-AgNPs and Tv-AgNPs. The Tl-AgNPs and Tv-AgNPs showed toxic effects on the non-targeted aquatic crustacean, Moina macrocopa at very low concentrations. This shows a potential threat to other aquatic organisms when applied to natural mosquito breeding water bodies.
Dinusha S. Perera, W.G. Hiruni Tharaka, Suranga R. Wickramarachchi, Deepika Amarasinghe, Channa R. De Silva, Thilini N. Gunawardana
Asian Journal of Chemistry
Abstract:- https://doi.org/10.14233/ajchem.2023.27956
Spagneticola trilobata (Wedelia, Creeping daisy) plant extracts show a dose-dependent allelopathic effect on Phaseolus vulgaris (Common bean) seed germination and growth. Because Wedelia contains water-soluble biochemicals, it should not be used in the manufacturing of biofertilizers, phytoremediation, or as live mulch.
K.R.S. Perera, R.M.C.S. Ratnayake, U.P.K. Epa
Journal of Experimental Biology and Agricultural Sciences
Kaumudee Kodikara, Thilanka Seneviratne, Pavithra Godamunne & Ranjan Premaratna
Teaching and Learning in Medicine
Abstract:- https://doi.org/10.1080/10401334.2023.2226633The Sansevieria trifasciata plant, commonly known as a popular indoor plant, has been known for its ability to remove toluene, a harmful indoor pollutant. This study focused on the plant's soil and internal bacterial communities that contribute to toluene degradation. The researchers selected the most active bacterial isolates from the soil and plant's internal parts and identified two highly effective ones: Priestia aryabhattai TE2 and Metabacillus halosaccharovorans 3S1. After 28 days of exposure to toluene, these bacteria reduced the toluene levels by 17.34% and 40.53%, respectively. Moreover, the survival rates of these bacteria remained high during the process. Metabacillus halosaccharovorans 3S1 showed strong growth while effectively degrading toluene. This research highlights how certain bacteria associated with Sansevieria trifasciata can help improve indoor air quality by reducing toluene levels.
Y. H. Kavindi Isurika Sandamali Gunasinghe, I. Vayanga Nishani Rathnayake, Mahendra Priyantha Deeyamulla
International Journal of Environmental Research-Springer
Abstract:- https://doi.org/10.1007/s41742-023-00538-6
Acta Tropica
Abstract:- https://doi.org/10.1016/j.actatropica.2022.106747
This study was done to characterize a microalga (Chlorella vulgaris) previously isolated from tropical freshwater receiving treated textile effluents for its ability to tolerate and remove Cr(VI) in extremely acidic environments by evaluating the influence of temperature on Cr(VI) tolerance and removal.
Journal of Environmental Science and Health, Part A
Social protection can be an effective policy instrument to achieve zero poverty. Although Sri Lanka has a comprehensive social protection system, a considerable percentage of households in Sri Lanka still need help with poverty, reflecting that the existing social protection system needs to correctly address the heterogeneity of poverty. A conventional social protection system is not always effective in eradicating poverty. Since the reasons and nature of poverty differ according to the poverty levels and spatial disparities, social protection programs deliberate these disparities. The outreach and impact of social protection are low in Sri Lanka since the current system does not incorporate the inflation rate and spatial poverty lines, Hence, it is essential to reformulate the existing social protection system considering the heterogeneity of poverty while implementing a rigorous method to select the beneficiaries and benefits of social protection programs to achieve sustainable development goals.
Social Sciences
Abstract:- https://doi.org/10.3390/socsci12070384
Non-alcoholic fatty liver disease (NAFLD) is a global health problem. Iron is the leading cause of liver damage in patients with thalassaemia major (TM), and data on the contribution of NAFLD to liver damage in TM is lacking. 45 TM patients who did not have liver cirrhosis were evaluated for the effects of iron overload. Nine (20%) patients had significant liver steatosis (S 1), and their body mass index (BMI) and liver fibrosis scores were higher than in patients without significant steatosis (SO) (p =0.03 and p 20.004, respectively). On regression analysis, liver steatosis was associated only with increase liver fibrosis was associated with increasing age. liver steatosis. male gender, and the presence Of diabetes. Neither liver steatosis nor fibrosis showed a significant association with liver iron concentration Or iron-related organ damage (hypogonadism). In this cohort of TM patients, steatosis of the liver. which is associated with increasing BMI, appeared to increase the risk of liver fibrosis.
British Journal of Haematology
Abstract:- https://doi.org/10.1111/bjh.18492
Journal of Health, Population and Nutrition
Abstract:- https://doi.org/10.1186/s41043-022-00341-7
IThis article was about frugal innovation which comes under the scope of innovation and business. The content mainly reviews the frugal innovation contents and practices. Additionally, some explanations were made to explain the variables connected with frugal Innovations. It has had a discussion on frugal innovation practices as well. The paper highlights the practice-related challenges to occupy the benefits of frugal innovations.
Y.L.Velananda, D.M.R. Dissanayake, C. N. Wickramasinghe
Scope
In recent years, the trend of working from home has gained immense popularity, offering numerous benefits such as increased flexibility and reduced commuting time. However, for women who choose to telecommute, balancing the demands of work and family can become a significant challenge. The constant juggling of professional responsibilities and personal obligations can lead to conflicts and stress. Nevertheless, by embracing mindfulness techniques, telecommuter women can find equilibrium, enhance productivity, and nurture their overall well-being.
Edward Rebecca, A. K. L. Jayawardana
Journal of Telecommunications and the Digital Economy
Abstract:- https://doi.org/10.18080/jtde.v11n2.694
This study was done to characterize a microalga (Chlorella vulgaris) previously isolated from tropical freshwater receiving treated textile effluents for its ability to tolerate and remove Cr(Vl) in extremely acidic environments by evaluating the influence of temperature on Cr(Vl) tolerance and removal.
A. M. K. C. B. Aththanayake, I. V. N. Rathnayake , M. P. Deeyamulla, and Mallavarapu Megharaj
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH
This study assessed liver fibrosis by fibrosis-4 (FIB-4) score biomarker compared with transient elastography (TE) among a Sri Lankan transfusion-dependent beta-thalassaemia population using TE as the reference standard for liver fibrosis. With predefined cut-off values, the study estimated the sensitivity and specificity of the FIB-4 score as a screening tool to rule out significant liver fibrosis (F2). Receiver operating characteristics (ROC) curve analysis was carried out to estimate a new cut-off value with better sensitivity for the FIB-4 score for ruling in significant liver fibrosis (F-2). Regardless of the cut-off point, the FIB-4 score cannot be used as a good screening tool to pick up F2 in patients with TOT, irrespective Of their splenectomy Status.
Padmapani Padeniya , Dileepa Senajith Ediriweera, Arjuna P. De Silva, Madunil Anuk Niriella, Anuja Premawardhena
BMJ Open
Brinjal or eggplant is a popular vegetable in Sri Lanka and widely cultivated throughout the country. However, it is also subjected to many diseases prompting excessive and overuse of pesticides by the farmers without a clear evaluation of the pathogens present in a field. While the post-harvest diseases of brinjal fruits and their causative agents have been investigated in many studies, the diseases to the plants in the field are less explored. Thus, in this study the prominent fungal diseases in brinjal plantations without pesticide application in Gampaha District, Sri Lanka, were identified to be leaf blight, necrosis and yellowing, caused by Diaporthe eugeniae, Lasiodiplodia theobromae and Pseudopestalotiopsis theae respectively.
H.V.A.S. Koshila, R.P. Wanigatunge, R.K.S. Dias and P. Edirisinghe
The Journal of Agricultural Sciences - Sri Lanka
Abstract:- http://doi.org/10.4038/jas.v18i2.10257
Centrocestus formosanus (gill fluke) is a trematode parasite that has spread throughout the world as a result of the aquarium fish trade. Its infection causes high fish mortalities and economic losses to fish farmers worldwide. At the University of Kelaniya, researchers investigated the efficiency of an ethanol (95%) extract of the cashew (Anacardium occidentale) apple in controlling C. formosanus infection in swordtail (Xiphophorus hellerii). According to the findings, 340 mg/L cashew apple extract can be utilized to treat this trematode infection in aquarium fish.
Udaya Priyantha Kankanamge Epa, Asha Srimali Premarathna
International Journal of Aquatic Biology
Reproductive traits such as fruit set, pollen traits can be crucial for the development of novel hybrids in ornamental plants including dendrobiums. In the present research, pollen viability, germinability and success in seed production of two indigenous Dendrobium species and ten commercial hybrids were compared to determine if the fitness traits are compromised in commercial hybrids. The reproductive ecology of indigenous and commercial hybrids were studied by observations of visits of natural pollinators. Effect of pollen storage temperature on seasonal flowering D. crumenatum pollen viability was assessed to determine a suitable pollen storage method for the benefit of breeding programmes. Indigenous species: D. crumenatum, D. anosmurn resulted the highest pollen viability and germinability while only 40% of the commercial hybrids had viable pollen and identified as desired hybrids for successful breeding programs. D. crumenatum pollen can be stored at 90C maintaining their viability for 14 days to perform successful cross-pollination. Although all the dendrobiums tested predicted to be pollinated by bees, they failed to produce fruit set under natural pollination due to the lack of native pollinators in the suburban environment. Thus, fruit set in dendrobiums examined occurred only by hand pollination. In addition, indigenous D. crumenatum can only be used as pollen donor in cross-pollination. Overall, our results facilitate parental selection with promising features to create novel hybrids.
Weerasinghe Elena Rumalie Silva, Harshini Herath, Sena Ratnayake, Renuka Nilmini Attanayake, and Priyanganie Senanayake
Journal of Pollination Ecology
Abstract:- https://doi.org/10.26786/1920-7603(2023)679
Co-inheritance of hereditary hemochromatosis (HFE) gene variants p, C282Y and p. H63D worsen iron overload in transfusion-dependent thalassemia. This study investigated a total of 125 transfusion-dependent ß-thalassemia major and HbE/ß thalassemia patients and tested for the c.845G>A (p.C282Y) and c. 187C>G (p.H63D) HFE gene variants. The HFE gene variant p_C282Y is unlikely to cause iron overload in Asian ß-thalassernia patients; the rarity of this variant in our study cohort replicates the findings of other South Asian population studies of this variant The presence of the p.H63D variant could be a potential risk factor for iron overload in ß-thalassemia patients. A more extensive cohort study is required to validate this finding.
Padmapani Padeniya, Hemali Goonasekara, Gayan Abeysekera, Rohan Jayasekara, Vajira Dissanayake
Frontiers in Pediatrics
Abstract:- https://doi.org/10.3389/fped.2022.890989
American Journal of Speech-Language Pathology (AJSLP)
Abstract:- https://pubs.asha.org/doi/10.1044/2022_AJSLP-21-00236
The study aimed to describe the vaccination coverage required to stop the spread of COVID-19 in Sri Lanka using age-stratified and unstratified Susceptible-Infectious-Recovered(SIR) models. Population data were acquired from the census report of the Census and Statistics of Sri Lanka. Models with differential equations forecasted the spread of COVID-19 with vaccination based on parameter estimates. Simulations investigated how the susceptible, infected, and recovered populations varied according to the different vaccination coverages. According to the results, 75% vaccination coverage was required in the entire population of Sri Lanka to interrupt the transmission of COVID-19 completely. The age-stratified SIR model showed that over 90% of vaccination coverage in each age group (below 30, between 30-59, and over 60) was required to interrupt the transmission of COVID-19 in the country. The number of COVID-19 infections in each age group of Sri Lanka reduces with the increase in vaccination coverage.
A.M.C.H. Attanayake
Journal of Occupational Health and Epidemiology
Abstract :- https://johe.rums.ac.ir/article-1-506-en.html
Sri Lanka Journal of Social Sciences
Abstract:- https://dx.doi.org/10.4038/sljss.v45i2.8341
Laboratory chemical waste management is an essential factor to be addressed in parallel to a research study. This publication described the use of a simple technique, the galvonostitic mehtod, to manage the CdTe electrolyte waste generated in CdS/CdTe solar cell fabrication by extracting the heavy metal cadmium from the waste. About 98% of the cadmium in the waste solution can be successfully removed using the galvanostatic process under a low current. The materials extracted can be use as precursors for CdTe deposition by close spaced sublimation or thermal evaporation after optimization.
G.K.U.P. Gajanayake, D.S.M. De Silva & H.Y.R. Atapattu
Journal of Materials Science: Materials in Electronics
Abstract :- https://doi.org/10.1007/s10854-023-10428-4
Crude oil usage in Organization for Economic Co-operation and Development (OECD) countries has been significantly higher since the early 1970s. Hence, oil can be considered one of the driving forces of the OECD economies since oil prices have frequently fluctuated over time, creating adverse economic and social impacts. The study confirms that oil price has a mixed impact on economic growth. Increases in oil price positively affect economic growth through interest rates while negatively affecting economic growth through the exchange rate, government expenditure, and investment. Since the total negative effect of oil price on economic growth outnumbers the positive outcome, the net impact of an oil price hike on economic growth is negative. The study strongly recommends implementing appropriate policies to reduce oil price fluctuations and use country-specific renewable energy.
N. P. Ravindra Deyshappriya, l. A. D. D. W. Rukshan, N. P. Dammika Padmakanthi
Sustainability
Abstract :- https://doi.org/10.3390/su15064888
Weligama Coconut Leaf Wilt Disease (WCLWD) is a quarantined disease in the Southern province, Sri Lanka. The disease is caused by a plant pathogen called phytoplasma and early detection is the key to successful management. Here we propose a PCR based methodology for consistent, and reliable early detection of the pathogen present in midribs of milky white bud leaf tissues of infetced coconut palms. It was also found that the pathogen can survive asymptomatically in a plant minimum of one year and pathogen movement from leaves to root was detected. This information is useful in early detection and disease eradication programs in the future.
Prasad R. De Silva, Chandrika N. Perera, Brian W. Bahder, Renuka N. Attanayake
pathogens
Abstract :- https://www.mdpi.com/2076-0817/12/2/294
Parasitology International
Abstract:- https://doi.org/10.1016/j.parint.2022.102715
Usually, the status of water pollution is assessed by measuring physical, chemical and biological parameters and comparing them with the standard values developed by the authorities. However, comparison of several parameters is not an easy task as the standard values are different for each parameter. The analysis become more complex if you want to observe temporal and/or spatial variations. Therefore, in this study, pollution indices were developed and compared to assess the status of water pollution in a surface water body. Water pollution index (WPI) and heavy metal pollution index (HPI) are developed by combining several water quality parameters which will provide a single value to compare. Depending on the nature of the pollutants, the authorities can decide whether to use WPI and or HPI to develop mitigatory measures for the polluted water body.
S.C.S.M. Hemachandra, B.G.N. Sewwandi
Environmental Nanotechnology, Monitoring & ManagementAbstract :- https://doi.org/10.1016/j.enmm.2023.100790
Equality, Diversity and Inclusion
Abstract:- https://doi.org/10.1108/EDI-08-2022-0224
LoRa, Sigfox, and Narrowband-Internet of Things (NB-IoT) are some of the long-distance, low-power wireless communication technologies developed in the recent past. The proposed system consists of mainly nodes and a gateway as the fundamental system architecture. Nodes only communicate with the gateway individually and the gateway communicates with all the nodes separately and wirelessly. The system in this proposed study uses long range low power RF wireless communication technique for primary data communication, where an Internet connection will not be required for the communication between the gateway and the nodes. Any number of nodes can be paired with the gateway, and the gateway can individually communicate with each and every node. Furthermore, gateways have the ability to store real-time data. Due to its unique design, the proposed system in this study can achieve addressable, bidirectional, and continuous data communication even without the Internet connection.
L D P S Jayasekara, T N Gurusinghe, J A Seneviratne, A L A K Ranaweera, K M D C Jayathilaka, L B D R P Wijesundera and S R D Kalingamudali
ECS TransactionsAbstract :- https://doi.org/10.1149/10701.17731ecst
Site investigation is crucial in characterizing the geomaterial profile for the design of bridge pile foundations. A site investigation plan should be conducted to maximize geomaterial information and minimize uncertainty. This study addresses these problems using multinomial categorical prediction and universal kriging on a random field with multiple simulations. The effectiveness of this combined analysis for determining an optimal site investigation plan (OSIP) is validated and compared to an analysis done solely on property uncertainty. The proposed OSIP yields a lower prediction error, improves the prediction of geomaterial type and property, and reduces the subsurface uncertainties.
Opeyemi E. Oluwatuyi, Kam W. Ng, Shaun S. Wulf, Rasika Rajapakshage
Geotechnical and Geological Engineering
Abstract :- https://doi.org/10.1007/s10706-023-02403-x
Fabrication of CdS/CdTe solar cell is the promising research field in the world. This study, introducing and intermediated ultra-thin CdTe nucleation layer by electrodeposition technique (ED-CdTe*), between the CBD-CdS window layer and CSS-CdTe absorber layer. Thus, it eliminates the recombination mechanism in the depletion region, and reducing pinholes formation, and creates better contact between CSS-CdTe heading to improve the efficiency of the device. The efficiency of the glass/FTO/CBD-CdS/CSS-CdTe and glass/FTO/CBD-CdS/ED-CdTe*/CSS-CdTe was improved from 14.6% to 15.6% in the presence of the nuleation layer.
G. K. U. P. Gajanayake, A. A. I. Lakmal, D. S. M. De Silva, and B. S. Dassanayake
Journal of Materials Science: Materials in Electronics
Abstract :- https://doi.org/10.1007/s10854-023-09895-6
Protecting groundwater from contamination and preserving is a rising global concern. Natural and anthropogenic activities degrade the quality of the groundwater. Contaminated groundwater is transformed into contaminated water, challenging uses including agricultural use. Proper identification of different sources of contamination and proper methods to prevent contamination from reaching groundwater is important. Further, governmental and institutional frameworks to combat contamination and treatment of contaminated groundwater is vital to contribute to the future achievement of food security.
A.M.M. Irfeey, M.M.M. Najim, Bader Alhafi Alotaibi and Abou Traore
Sustainability
Abstract :- https://doi.org/10.3390/su15054202
Bundala wetlands are declared as a Ramsar wetland in Sri Lanka. Two of the wetlands in Bundala have transformed from saline areas into freshwater ecosystems due to irrigation water discharge for Lunagwehera(nearly 1.28 × 107 m3 of drainage water/annum). This resulting ecosystem and habitat changes presumably have favored plant invasions. We hypothesized that this change is due to climate/rainfall changes and irrigation practices. The objective of this research is to determine the influence of rainfall and irrigation practices in the catchment on water level and plant nutrient availability that could potentially change ecology of these wetlands. Monthly rainfall data for the Bundala area (1988–2017) were statistically analyzed, and a statistically significant change in rainfall was not discernible, confirming climate change is unlikely to be a driver of increasing the lagoon water level. Irrigation drainage has resulted in decreased salinity, while inundation and plant nutrient content increased, changing the wetlands' ecology and socioeconomic status of the dependent rural communities.
K M K Patabendige, M D Amarasinghe, R M C S Ratnayake, D D G L Dahanayaka
Irrigation and Drainage
Abstract :- https://doi.org/10.1002/ird.2797
In this computational investigation, antioxidant potentials of the four major catechins [(-)- epicatechin (EC), (-)-epigallocatechin (EGC), (-)- epicatechin-3-gallate (ECG), and (-)-epigallocatechin-3- gallate (EGCG)] present in green tea were explored from the thermodynamic point of view. HAT, SET–PT, and SPLET mechanisms were used to illustrate their radical scavenging activities in the aqueous phase using solvation models. It was revealed that the HAT mechanism has demonstrated the lowest set of enthalpies compared to other two reaction mechanisms (SET-PT and SPLET). It was positively obvious that (-)-epigallocatechin-3- gallate (EGCG) possessed the lowest set of average enthalpies as showing the highest antioxidant potential as compared to the other three catechins. Based on average enthalpies, antioxidant potential of catechins found in green tea can be placed in the following order of ascending: EC < EGC < ECG < EGCG. It can be concluded that modification of the chemical structure of (-)-epigallocatechin-3-gallate (EGCG) provides an insight into the design of structurally novel, potent antioxidants which will be more economical and beneficial in pharmaceutical industry.
Sanduni S. Wijesooriya, Dinesh R. Pandithavidana
Chemistry & Chemical Technology
Abstract :- https://doi.org/10.23939/chcht16.04.591
The Systematic Literature Review focuses on Android application analysis and source code vulnerability detection methods and tools by critically evaluating 118 carefully selected technical studies published between 2016 and 2022. It highlights the advantages, disadvantages, applicability of the proposed techniques, and potential improvements of those studies. Both Machine Learning (ML)-based methods and conventional methods related to vulnerability detection are discussed whilefocusing more on ML-based methods, since many recent studies conducted experiments with ML. Therefore, this article aims to enable researchers to acquire in-depth knowledge in secure mobile application development while minimizing the vulnerabilities by applying ML methods. Furthermore, researchers can use the discussions and findings of this SLR to identify potential future research and development directions.
Janaka Senanayake, Harsha Kalutarage, Mhd Omar Al-Kadri, Andrei Petrovski, Luca Piras
ACM Computing Surveys
Abstract :- https://dl.acm.org/doi/10.1145/3556974
Bacterial soft rot disease, caused by Pectobacterium spp., can lead to significant losses in carrot yields. As current control measures involving the use of chemicals or antibiotics are not recommended in many countries, bacteriophage-mediated biocontrol strategies are being explored for the successful control of these phytopathogens. The successful implementation of such biocontrol strategies relies heavily upon the proper understanding of the growth characteristics and genomic properties of the phage. Further, the selection of taxonomically different phages for the formulation of phage cocktails in biocontrol applications is critical to combat potential bacterial resistance development. This study was conducted to carefully characterize and resolve the phylogenetic placement of the P. carotovorum phage vB_PcaM_P7_Pc by using its biological and genomic properties. Phage P7_Pc has a myovirus morphotype with an exclusively lytic life cycle, and the absence of genes related to lysogeny, toxin production, and antibiotic resistance in its genome confirmed its suitability to be used in environmental applications. Furthermore, P7_Pc is classified under the genus Certrevirus, making it the first reported phage of the genus of the host species, P. carotovorum.
Kishani N Naligama, Anupama P Halmillawewa
Microbiology Spectrum
Abstract :- https://doi.org/10.1128/spectrum.03126-22
Setaria digitata, a nematode that lives in the peritoneal cavity of ruminants is the causative agent of cerebrospinal nematodiasis affecting livestock health. The ‘ACAT related enzyme 2 required for viability 1’ (arv-1) gene encodes putative lipid transporter that is essential in eukaryotes. The molecular characterization of nematode arv-1 has scarcely been studied and putative arv-1 isolated from S. digitata (Sd-arv- 1) was used for this purpose. This study revealed that Sd-ARV-1 is a structurally conserved, ubiquitously expressed protein, which may be involved in development, reproduction, tissue remodeling, muscle contraction etc., in nematodes. Therefore, the potential of Sd-ARV-1 as a target for the control of parasitic nematode diseases cannot be disregarded.
Palliya Guruge Thilini Sithara Wickramatunga, Yasanthi Illika Nilmini Silva Gunawardene, Naduviladath Vishvanath Chandrasekharan & Ranil Samantha Dassanayake
Gene Reports
Abstract :- https://doi.org/10.1016/j.genrep.2022.101643
Information & Computer Security
Abstract:- https://doi.org/10.1108/ICS-08-2021-0129
Dengue Fever (DF)/Dengue Haemorrhagic Fever (DHF) is an emerging disease that is endemic throughout Sri Lanka, causing a significant effect on livelihoods of people living in the endemic areas. Sterile Insect Technique (SIT) aims to cause the decline of the target mosquito population through the release of a sufficient number of sterilized male insects. This study aimed to produce sterile Aedes aegypti males for future SIT-based dengue control programs aiming at the suppression of Aedes aegypti populations in Sri Lanka.
Tharaka Ranathunge, Jeevanie Harishchandra, Hamidou Maiga, Jeremy Bouyer, Y. I. Nilmini Silva Gunawardena, Menaka Hapugoda
PLOS ONE
Abstract :- https://doi.org/10.1371/journal.pone.0265244
Many manufacturers and retailers often outsource their logistics functions to logistics service providers (LSPs) to focus more on their core business processes. Due to the competitiveness and popularity of the sustainability concept, those organizations evaluate their prospective LSPs not only based on economic aspects but also social and environmental aspects. This paper proposes a framework that can be used by organizations when evaluating and selecting LSPs based on their sustainability performance. A composite sustainability performance index (CSPI) is constructed, incorporating multiple dimensions and indicators related to economic, social, and environmental aspects, which are widely used to measure sustainability performance. A linear programming (LP) model is then proposed, which allows the organizations to decide the desired number of LSPs after considering all requirements and limitations. The proposed framework is flexible as it depends on sustainability.
A.P.K.J. Prabodhika, A.P.R. Wickramarachchi, D.H.H. Niwunhella, A. Wijayanayake
International Journal of Business Performance and Supply Chain Modelling (IJBPSCM)
Abstract :- http://dx.doi.org/10.1504/IJBPSCM.2022.10053158
Sri Lanka as an agricultural country needs to manage the seed-borne fungal pathogens that have caused infections and diseases that result in significant crop losses and a decline in yield and productivity. Therefore, it is imperative to apply pathogen management strategies that are environmentally friendly, and economically feasible such as plant extractions, to reduce seed-borne fungi and increase the quality of the seed. This study aimed to identify the antifungal efficacy of Onion, Aloe vera, Neem, and Ginger extracts and their effective concentrations in controlling seed-borne fungal pathogens. The ginger crude extract exhibited the highest antifungal activity against the tested pathogens which was as effective as Captan 50% (WP).
Hansini Navoda, Daranagama Dinushani Anupama
Studies in Fungi
A non-edible portion of Pomegranate is reported to be rich in a diverse range of phytochemicals that embrace health-promotive features. Though the antioxidant power and nutritive value of fruit juice are well known, knowledge of nonedible fractions is very poor. Hence, evaluating the antioxidant power and nutritional value of fruit peel and the seed of pomegranates was targeted. Based on the findings of current work, peels of four pomegranate cultivars, Kalpitiya red, Nimali, Daya, and Nayana proved to be an excellent source of natural antioxidants that could be applied in future therapeutic and medicine and as a safer natural antioxidant in food industries. Higher protein, fiber, and lipid content in seeds and high carbohydrate content in the peel implies that pomegranate by-products could be used as a substrate for the production of nutritionally valuable components that could find several applications as functional food ingredients, food additives, and nutraceuticals that pomegranate by-products could be used as functional food ingredients, food additives, and nutraceuticals.
P.D.S.N.H. Panapitiya, M.K.B. Weerasooriya and T.I. Punchipatabendhi
The Journal of Agricultural Sciences - Sri Lanka
Abstract :- http://doi.org/10.4038/jas.v17i3.9919
Microalgal growth media consist of various components that support the microalgal growth. But some of those components shown to have an effect on the free metal content added to the media to study the effect of heavy metals on the microalgal growth. This study revealed that the media containing components of less metal binding capacity show reduced algal growth due to the availability of considerable content of free metals in the growth medium.
I.V.N.Rathnayake, Mallavarapu Megharaj, Micheal Beer, Ravi Naidu
Journal of Applied Phycology
Abstract :- https://doi.org/10.1007/s10811-021-02589-8
The purpose of this study was to identify the perceptions of Ayurveda medical students regarding virtual or online Anatomy learning. The study was conducted on 69 second-year Ayurveda medical students using a self-administrated questionnaire. The majority of the students (92.8%) did not have prior experience in online learning (OL) before the COVID 19 pandemic. Regarding the learning activities preferred by students prior to the COVID 19, 73.9% of students preferred the live lectures from the academic staff. It was evident that 92.8% of students believed that zoom cloud meeting is the most effective method of Anatomy in the OL platform. In order to improve their Anatomy dissection knowledge, 50.7% of students were suggested to show live Gross Anatomy dissection. The OL is more successful than onsite learning for the theory of Anatomy. Access to online materials (86.9%), learning from their own places (92.7%), the ability to stay at home (95.6%), interactivity of the class (56.5%), and the ability to record a meeting (88.4%) are the key advantages of OL. Reduced Interaction with the teacher (78.2%), technical issues (92.7%), lack of interactions with their colleagues (82.6%), poor learning conditions at home (71%), and social isolation (81.1%) are the main disadvantages that they must face in their online learning process. In the era of smartphones and the internet, it was indicated that the Ayurveda medical students prefer to be engaged in the hybrid system which includes online Anatomy lectures with onsite Anatomy practicals.
Lanka Ranaweera, G.V.P. Samaranayake, Eranda Cabral
Azerbaijan medical journal
Women's Studies: An Interdisciplinary Journal
Abstract:- https://doi.org/10.1080/00497878.2022.2070750
Coastal wetlands in Asia including Bundala Ramsar wetland in Sri Lanka are threatened by invasive Prosopis juliflora (Kalapu Andara) which is a fast growing hard tree introduced to Sri Lanka by the Forest Department to tolerate harsh salty environment in the coast. As it is widely spread, there is a potential to be used P. juliflora as a dry matter energy source' especially for industrial biomass boilers in Sri Lanka. Current study found out that overall energy performance of P. juliflora (Fuel Value index) is better than or equivalent to the conventional fuelwood species. Also, ash production as a percentage to the biomass used is also comparably lower. P. juliflora individuals with diameter greater than 10 cm at breast height are ideal as fuelwood and any individual grown to that maturity is ready to harvest as a source of fuel. It is better to sundry P. juliflora wood for 24 days to reduce moisture to increase energy performance. When compared energy properties relative to another invasive species Ipil Ipil available in the in and around BRW, P. juliflora is equally better. As community is interested in ipil ipil as a source of energy, P. juliflora also can be promoted with the intervention of relevant administering agencies to manage invasive P. juliflora in the area.
W.A.R.T.W.Bandara, Oshadhi Ranasinghe, Priyan Perera, Richard Vlosky, Anil RajKizha
Trees , Forests and People
Abstract :- https://doi.org/10.1016/j.tfp.2022.100330
This study was conducted to isolate actinomycetes with bioactive potentials from surface sediments collected from 'Kadolkele' mangrove ecosystem located in the Negombo lagoon area, Sri Lanka. The isolated actinomycetes were further identified based on the morphological and molecular biological characterization techniques. Antibacterial activity of isolates against four selected bacterial pathogens and the ability of isolates to produce extracellular enzymes: cellulase, amylase, protease and lipase were evaluated. Further, the crude yellow pigment of one of the isolates was extracted and used to dye commercially available fabrics. The dyed facbrics retained the yellow color after acid, alkaline, and cold- water treatments suggesting the potential of isolates to be used in future biotechnological applications.
Kishani N. Naligama, Kavindi E. Weerasinghe, Anupama P. Halmillawewa
Polish Journal of Microbiology
Bevioural Finance as an emerging field in Finance plays an important role in recognizing the investors behaviour. Our research adds to the body of knowledge by examining similarities and differences across investor sentiment proxies and providing a novel sentiment proxy to forecast bitcoin returns and volatility. Researchers at the University of Kelaniya Ms. Ishanka Dias, Ruwani Fernando, Narada Fernando conducted the study which demosntrate the non-linear relationship between investor sentiments and bitcoin returns; and volatility, with predicted power varying dependent on market conditions. Therefore, it guides investors to seek profits in each market condition and facilitates policymakers to take timely decisions and proper law enforcement to the bitcoin market.
Ishanka K. Dias, J.M. Ruwani Fernando, P. Narada D. Fernando
International Review of Financial Analysis
Abstract :- https://doi.org/10.1016/j.irfa.2022.102383
Hardness in water is responsible for both residential and industrial problems. Moreover, drinking hard water is suspected as the main cause of chronic kidney disease of unknown etiology (CKDu) in Sri Lanka. The major constituents that are responsible for water hardness are calcium and magnesium ions. In this study, a composite was synthesized using activated carbon of Strychnos potatorum seeds (ACSP) and acrylamide to remove hardness in drinking water. According to this study, the process of removal of hardness depends on the contact time, adsorbent dosage, initial contents, and pH of the solution. The adsorption data were well fitted to the Freundlich isotherm and the pseudo-second-order kinetic models. Furthermore, environmental samples collected from Anuradhapura, Sri Lanka, which is well known for water with high hardness, were treated with an adsorbent, and hardness was reduced effectively.
Yohan L. N. Mathota Arachchige, T. D. Fernando
Journal of Chemistry
Cutaneous leishmaniasis is prevalent in Sri Lanka since 1992. It remains as a health issue with increasing numbers and spreading from endemic to non-endemic areas in the county. Kegalle district is a new disease focus, which notified the first case in 2016. However, there is no documented evidence of the vector distribution, abundance and potential risk factors in this district. Patients recoded from 2016-2020 were interviewed at two high risk Medical officer of Health areas and entomological surveys for leishmaniasis vectors were conducted from 2019-2020. Bioclimatic suitability for the disease transmission was evaluated using ecological niche modelling. This is the first ever approach in Sri Lanka to evaluate the bioclimatic suitability for disease transmission/establishment of Leishmaniasis.
Tharaka Wijerathna, Krishan Wickramasinghe, Nayana Gunathilaka, Asela Perera, Sujeewa Bandara
Acta Tropica
The clinical significance of evaluating non-sperm cells, which include spermatogenic and non-spermatogenic cells, commonly known as "round cells" is not well established. This study aimed to assess the clinical significance of distinct identification of immature germ cells (IGCs) in semen, and their relationship with semen parameters and chromosome maturity of sperm. The results indicated that elevated IGCs would be a good indicator for detecting disturbed testicular microenvironment. It is better to go into more detailed diagnoses if the rate of IGCs exceeds 15% of sperm in semen. As the high count of IGCs coincide with sperm chromatin immaturity, taking precautions to exclude immature cells in samples with high immature germ cells count would be useful in assisted reproductive technologies (ART) procedures, especially in intracytoplasmic sperm injection (ICSI).
D.M. Anura Dissanayake
International Journal of Infertility and Fetal Medicine
Abstract :- https://doi.org/10.5005/jp-journals-10016-1217
The thermal stability of the rice bran extract (RBE) and the effect of RBE on the shelf-life of sunflower oil and the quality characteristics and shelf-life of baked cakes was evaluated in this study. Thermally treated RBE retained 75% of the initial capacity in protecting sunflower oil. Cakes baked with RBE received higher scores for taste, color and overall acceptability compared to control or synthetic antioxidant-added cake. RBE extended the shelf-life of the cakes assessed based on the microbial counts and chemical methods. RBE-added cake exceeded the aerobic plate count (APC) and yeast and mold count (YMC) on days 11 and 13 respectively, while the control cakes without added antioxidants exceeded the APC and YMC on day 7. RBE-added cakes maintained hexanal levels below 5 mg/kg over 28 days while the control cake exceeded this level on day 21. The results suggest that RBE can be used as a natural food additive to improve the quality and shelf-life of baked foods and edible oils.
K. P. Seneviratne, N. V. P. Anjali, C. M. Senanayake, N. Jayathilaka and N.A.K.P.J. Seneviratne
Food Production, Processing and Nutrition
Abstract :- https://doi.org/10.1186/s43014-022-00094-0
This study indicates that femur measurements are a useful tool in the estimation of sex in human skeletal remains found from the archaeological and forensic context in Sri Lanka. A linear discriminant analysis model over the regression model is suggested to estimate the sex using osteometric measurements of the fragmentary and comple. te femur. For a fairly completed femur, linear discriminant function analysis of four femoral measurements (Anteroposterior mid shaft diameter, epicondylar breadth, bi-trochanter length, and maximum shaft diameter) provides higher accuracy of sex determination. However, for fragmented proximal part of the femur indicated the measurements of Transverse head diameter and bi-trochanter length, whereas the fragmented distal part of the femur suggested the measurements of epicondylar breadth and the maximum length of the lateral condyle.
R.M.S.L. Ranaweera, E. Cabral, D. M. P. V. Dissanayake and W. S. V. Lakshan
International Journal of Morphology
The red cell membrane disorders are a group of genetic disorders. In Asian countries, limited studies have been conducted to determine the use of different methods to diagnose membranopathies. In the current review the usage and limitations of different diagnostic techniques used to diagnose membranopathies in Asian countries were evaluated. The results showed that different Asian countries have used different diagnostic criteria for the diagnosis. Further a single method could not diagnose all membranopathies. Therefore, a common work flow using a combination of conventional and advanced techniques could be used for the definitive diagnosis of membranopathies.
R. Silva, D. Amarasinghe, S. Perera and A. Premawardhena
International Journal of Laboratory Hematology
Abstract :- https://doi.org/10.1111/ijlh.13800
Identifying sector-specific indicators enables assessing the impact of sustainability issues on value creation and performance comparison among similar organizations. This study aims to identify sector-specific sustainability indicators and priorities based on the material issues of the logistics sector. Qualitative content analysis was performance using Leximancer software to identify key themes and material concepts of sustainability reports. The results showed that the most important indicators of the logistics sector are economic performance and energy, yet sustainability reports appear to focus more on reporting social sustainability information. This study is beneficial in ensuring consistency of sustainability reporting, which is a prerequisite for policy making in sustainable logistics.
B.C.P. Jayarathna, D. Agdas, L. Dawes and T. Yigitcanlar
Sustainability
Abstract :- https://doi.org/10.3390/su132413617
A new multi-crop cultivation planning approach is introduced for the Sri Lankan rural farming communities using 24 crops and it will be useful for agricultural planners as well. The objectives of this research are to maximize the profit of cultivation and maximize the harvest. The fuzzy goal programming (FGP) approach was used to allocate land and other resources optimally under uncertain conditions, to optimize profit, production, labor, water use, fertilizer costs and land allocation. The proposed model suggested statistically significant increments of 11% and 10.6% for the net return and harvest amount, respectively, for the 24 crops compared to existing cultivation techniques.
N.M. Hakmanage, N.V. Chandrasekara, M. Jayasundara
Agriculture and Natural Resources
Abstract :- https://doi.org/10.34044/j.anres.2021.56.1.18
Multi-objective optimization (MOO) has been a widely used method in sustainable supply chain and logistics modeling (SSCLM). Selecting a suitable optimization technique and solution method is still of interest as model performance is highly dependent on decision-making variables of the model development process. This study provides insights from the analysis of 95 scholarly articles to identify research gaps in the MOO for SSCLM and to assist decision-makers in selecting suitable MOO techniques and solution methods. The results of the analysis indicate that economic and environmental aspects of sustainability are the main context of SSCLM, where the social aspect is still limited. More SSCLMs for sourcing, distribution, and transportation phases of the supply chain are required. Additionally, more sophisticated techniques and solution methods, including hybrid metaheuristics approaches, are needed in SSCLM.
B.C.P. Jayarathna, D. Agdas, L. Dawes and T. Yigitcanlar
Sustainability
Abstract :- https://doi.org/10.3390/su132413617
Chemicals present in plants can be used to control diabetes. However, these chemicals need to be extracted under mild conditions and consumed by individuals to get the benefits. Ceylon cinnamon is known to be effective in controlling diabetes. The current study focuses in extracting antidiabetic chemicals present in cinnamon using mild conditions and fungi.
W.A.N.M. Wariyapperuma, S. Kannangara, Y.S. Wijayasinghe, S. Subramanium and B.M. Jayawardena
Letters in Applied Microbiology
Abstract :- https://doi.org/10.1111/lam.13410
A whole-cell microalgal-cyanobacterial array biosensor was successfully developed for monitoring acute metal toxicity in water systems. Biosensor organisms respond to metals within 10 minutes’ exposure. Survival potential of the biosensor organisms was higher at high pH. Biosensor was viable throughout 8 weeks of storage at 4 °C.
I.V.N. Rathnayake, T. Munagamage, A. Pathirathne and M. Megharaj
Water Science & Technology
Abstract :- https://doi.org/10.2166/wst.2021.339
Selecting most tolerant roadside trees in different urban environmental settings help to mitigate air pollution by serving as a sink for gaseous air pollutants and be tolerant for polluted environments. When look into the ability of rad side trees to tolerate air pollution, performance varied as Madhuca longifolia (Butter tree) > Peltophorum pterocarpum (Yellow flame tree) > Terminalia catappa (Indian almond) > Cassia fistula (Golden shower tree) > Pongamia pinnata (Indian beech). Four biochemical parameters; pH, ascorbic acid content, relative water content and total chlorophyll content on leaves were tested at Beddagana wet land park and Panchikawatta, Pettah and Maradana area in Colombo Municipal Council which varying air pollution levels with regards to SO 2 , NO 2 and PM 2.5 levels in ambient air.
W.A.R.T.W. Bandara and C.T.M. Dissanayake
Urban Climate
Abstract :- https://doi.org/10.1016/j.uclim.2021.100848
Engineered nanomaterials especially titanium dioxide nanoparticles (nanoTiO2) are increasingly used in wide variety of commercial products and industrial processes. This study found toxicity of nanoTiO2 on tadpoles of Asian Common toad. Toxic effects include mortality, development delays and tissue alterations in the gut and liver. Results indicate that release nanoTiO2 could pose negative impacts to amphibian populations.
K.M.S. Ruvinda and A. Pathiratne
Bulletin of Environmental Contamination and Toxicology
Abstract :- https://doi.org/10.1007/s00128-021-03352-y
Camping is a popular activity in the traditional nature-based tourism domain and becoming popular as a key recreational activity in Sri Lanka's national parks (NPs). Recreational uses such as camping in natural areas can induce significant and often localized resource impacts that can affect soil, vegetation, wildlife and water, with the severity of such impacts varying according to the intensity of use. There was no evidence for any difference in the level of environmental degradation associated with high and low use campsites. There was no reports significant levels of environmental degradation related to all the indicators of biophysical impacts at both high and low use campsites.
P. Perera, D. Newsome and W.A.R.T.W. Bandara
Tropical Life Sciences Research
Abstract :- https://doi.org/10.21315/tlsr2021.32.3.7
Forest certification found to be helpful for companies to access new markets, keep market share, and sell products in existing markets. In this study, 50 forest-based companies in Sri Lanka (43 wood-based manufacturers and 7 plantation companies) to ascertain their participation in forest certification, current and future forest certification trends, as well as their satisfaction with the performance of Forest Stewardship Council (FSC) certification in its economic, environmental, and social aspects. Study findings revealed that the FSC certification has substantially improved company images by positioning certified companies as socially responsible businesses, while helping to create better business stakeholder relationships.
P. Perera, R.L. Rupasinghe, D.Weerasekera, R.Vlosky and W.A.R.T.W. Bandara
Forests
Abstract :- https://doi.org/10.3390/f13020179
Cuprous oxide (Cu2O) is a suitable semiconducting material for fabrication of low-cost, eco-friendly semiconductor junction devices. Besides the parameterization of the growth conditions of Cu2O, formation of metal contacts impact the overall performance of Cu2O junction devices. Modification of the Cu2O thin film surfaces prior to make contacts with Au has shown the capability to alter the junction properties. This study reveals the possibility of employing surface treatments on electrodeposited Cu2O thin films in fabrication of high efficient Cu2O based junction devices.
F.S.B. Kafi, K.M.D.C. Jayathilaka, L.B.D.R.P. Wijesundera and W. Siripala
Journal of the National Science Foundation of Sri Lanka
Abstract :- http://doi.org/10.4038/jnsfsr.v49i1.8942
Speech and language therapists need to determine if a child’s speech sounds are age-appropriate, delayed or disordered speech skills. To do so, they need language-specific norms for the acquisition of speech sounds. There are currently no established norms for the acquisition of Sinhala consonants, which have implications for accurate diagnosis. The aim of this study was to document preliminary trends observed in the trajectory of consonant sound development in Sinhala-speaking young children so as to form a set of ‘working norms’. A picture-based articulation assessment was administered to 70 typically developing children who were between 3 years and 6 years 11 months of age. The results offer working norms for the rate of acquisition and order of acquisition of speech sounds for Sinhala.
S. Hettiarachchi, M. Ranaweera and R.M.W. Rajapaksha
Disability, CBR & Inclusive Development
Abstract :- http://doi.org/10.47985/dcidj.456
Development of a dengue vector mosquito blocking transmission of dengue viruses is important for integrated control of dengue vector mosquitoes. Assessment of developmental and reproductive fitness of a dengue-resistant transgenic Aedes aegypti with respect to its wild mosquitoes were assessed. Transgenic mosquito showed reduction of the fitness parameters and it may lead to a subsequent reduction of transgenic vector density over the generations in field applications. However, antibiotics of co-trimoxazole, amoxicillin, and doxycycline have shown the improvement of fitness parameters indicating the usefulness in field release of transgenic mosquitoes.
H.P.B.K.D. Ramyasoma, R.S. Dassanayake, M. Hapugoda, and Y.I.N.S. Gunawardene
BioMed Research International
Abstract :- https://doi.org/10.1155/2021/6649038
This study generated a comprehensive database on the culturable bacterial community found in the midgut of field-collected (Ae. aegypti and Ae. albopictus) and laboratory-reared (Ae. aegypti) mosquito larvae and adults from Sri Lanka. Data confirm that the midgut bacterial diversity in the studied mosquitoes varies according to species, developmental stage and strain (field vs laboratory).
K. Ranasinghe, P.A.D.H.N. Gunathilaka, L.D. Amarasinghe, W. Rodrigo and L. Udayanga
Parasites & Vectors
Abstract :- https://doi.org/10.1186/s13071-021-04900-5
The study focused on the impacts of climate change on the settler community who engage in agriculture at the Horowpathana in the North Central Province of Sri Lanka. The study found that the temperature and rainfall of the area have been significantly increasing since 2000 due to climate change. Accordingly, the farmers have been transforming their farming methodology to match the climatic conditions.
L. M. Dharmasiri and E. G. M. Jayarathne
Indonesian Journal of Geography
Abstract :- https://doi.org/10.22146/ijg.64269
This study finds that the alcohol policy environment in Sri lanka is weak and influenced by the alcohol industry. The laid back nature of the policy environment also comes from the weak public health programs and the lack of political backing. The study also identifies that a unified public health approach supported by policy and political commitment may pave the way for better alcohol control in Sri Lanka.
A.L.A.K. Athauda, R. Peiris-John, J. McCool, R. Wickremasinghe and S. Ameratunga
World Medical and Health Policy
Abstract :- https://doi.org/10.1002/wmh3.471
• Study focuses on complexing agent free cathodic electrodeposition technique for developing ZnS as a buffer layer for CdS/CdTe based solar cells.
• Used sodium thiosulfate as the sulfur precursor for the first time in electrodepositing ZnS.
• Cleary illustrates the optimization of electrodeposition parameters, temperature, pH, deposition potential, and deposition time.
• The optical absorption measurement revealed, low light absorbance by the materials while it has direct energy band gap of 3.64 eV, free of codeposited impurity species and shown a blue shift from bulk ZnS.
• Sodium thiosulfate has been effectively used to electrodeposit thin films of ZnS with ideal qualities of a buffer layer.
H. M. L. U. Madhuwanthi , G. D. K. Mahanama and D. S. M. de Silva
Journal of Electronic Materials
Abstract :- https://doi.org/10.1007/s11664-021-08948-y
Fungi were isolated from decaying hardwoods in the dry zone forests of Sri Lanka and they were identified using DNA based methods. Among these fungi, there were very good enzyme producers. Polyethylene degradation abilities of those enzyme producers were studied and strong signatures of polyethylene deterioration could be observed. The next step is to find the role of fungi and the enzymes in polyethylene degradation.
P. Perera, A. S. Deraniyagala, M. P. S. Mahawaththagea, H. Herath, C. S. K. Rajapakse, P. Wijesinghe, R. N. Attanayake
BioResources
Abstract :- https://doi.org/10.15376/biores.16.4.7056-7070
1. Traditional and hybrid Sri Lankan rice varieties were cultivated
2. As, Cd, Cr, Hg, Pb and Se contents were determined in harvested rice grains
3. Cadmium contents in rice varieties were ranged from not detectable to 158.9 μg kg-1
4. Pachcha Perumal rice showed a very high tolerance to Cd accumulation
5. This study also highlighted the importance of developing systematic and holistic sampling strategies and analytical methodologies for trace element analysis in rice, water, soil, and agrochemicals.
C. Navarathna, S. Pathiratne, D.S.M.de Silva, J. Rinklebe, D. Mohan, T. Mlsna
Groundwater for Sustainable Development
Abstract :- https://doi.org/10.1016/j.gsd.2021.100619
Fish waste is a protein-rich source that can be used in the formulation of organic liquid fertilizers. This study carried out to investigate the utilizing potential of fruit wastes of Ananas comosus (Pine Apple) and Carica papaya (Papaya) that contain proteases to hydrolyze fish waste proteins to fulfill plant nutrient requirements. Liquid organic fertilizers were produced with hydrolyzed fish waste that enriched by adding Gliricidia sepium (Weta Hira), Chromolaena odorata (Podisingho maran), Tithonia diversifolia (Wild Sunflower), Mikania scandens (Wathu Palu) and coconut husk-ash. Fertilizers were tested on the growth of Basella alba (Nivithi) comparing with a standard fertilizer. Ananas comosus ripe fruit peels and the mixture of (A. comosus + C. papaya) showed the highest enzyme activities. Hydrolysis of fish waste using the fruit wastes of A. comosus and C. papaya could be effectively used as an organic fertilizer for the growth of B. alba that leads towards sustainable waste management.
R. H. A. A. Ranasinghe, B. T. S. D. P. Kannagara & R. M. C. S. Ratnayake
International Journal of Recycling Organic Waste in Agriculture
Abstract :- http://ijrowa.khuisf.ac.ir/article_680065.html
This study was conducted to formulate organic liquid fertilizers using selected plant materials i.e., Tithonia diversifolia, Mikania scandens, Chromolaena odorata and Gliricidia sepium with selected organic wastes to compare the efficacies of foliar and soil-applications over the growth of leafy vegetables; Basella alba and Centella asiatica. Selected plant materials were allowed to decompose for two months. Fertilizers were foliar and soil-applied separately on C. asiatica and B. alba in pot trials. Fertilizer formulated with decomposed plants + fish waste treated with C. Papaya significantly recorded the highest N (0.57%), P (0.06%) and highest growth of C. asiatica and B. alba over both soil and foliar applications. Formulated such novel fertilizers can be used in organic farming to reduce the adverse impacts of chemical fertilizers.
R. H. A. A. Ranasinghe, R. M. C. S. Ratnayake and B. T. S. D. P. Kannangara
The Journal of Agricultural Sciences - Sri Lanka
Abstract :- http://doi.org/10.4038/jas.v16i03.9466
Since diabetes mellitus type 2 (DMT2) is a leading metabolic disorder in the world, the present investigation was carried out to explore anti-diabetic actions (α-amylase and α-glucosidase inhibitory potential ) of phytochemicals from Cinnamomum zeylanicum accessions, namely C. zeylanicum Sri Wijaya (SW), C. zeylanicum Sri Gemunu (SG) and commercially available C. zeylanicum (CC). Microwave Digestion (MD), Pressurized Water Extraction (PWE), Steam Distillation (SD), Solvent Extraction (SE), Decoction Water Extraction (DWE) and Infusion Water Extraction (IWE) methods were used to prepare Cinnamon quill extracts. Total phenolic content (TPC, Folin-Ciocalteu method) and Proanthocyanidin content (PC, vanillin assay), α-amylase and α-glucosidase inhibition of Cinnamon extracts were determined spectrophotometrically. The α-amylase and α-glucosidase inhibition were reported in terms of IC 50 value and the lowest IC 50 values were observed in PWE and DWE of SW. Benzoic acid, cinnamyl alcohol, benzyl alcohol, and 4-Allyl-2,6-dimethoxyphenol were identified as major compounds in SW extracts and these compounds are believed to be responsible for strong enzyme inhibitory activity of the extracts. The C. zeylanicum, SW accession holds some promise in the management of diabetes.
W. A. N. M. Wariyapperuma, S. Kannangara, Y. S Wijayasinghe, S. Subramanium, B. M. Jayawardena
PeerJ
Abstract :- https://peerj.com/articles/10070/
Duodichogamy and multi-cycle dichogamy are rare forms of temporal separation of male and female reproductive functions in flowering plants. We studied the floral phenology, breeding system and pollination of two Bridelia species in Sri Lanka, with a particular focus on the alternation of sexual phases to determine variation in their dichogamy. Three dichogamy patterns were identified in B. retusa, including one-cycle dichogamy (male → female or female → male), duodichogamy (male → female → male), multi-cycle dichogamy (repeated flowering cycles alternating between male and female) and pure males. Except for multi-cycle dichogamy, the other dichogamy patterns were prevalent in B. moonii. This study provide evidence for blowfly pollination in Bridelia retusa. Further positive moderate correlation was observed between femaleness and rainfall in all the studied sites for two Bridelia species studied.
M. A. Dias and R. M. C. S. Ratnayake
Australian Journal of Botany
Abstract :- https://doi.org/10.1071/BT21020
Fungal inhabitants in lichen thali are particularly referred as Endolichenic Fungi (ELF). These fungi are rich in novel unexplored metabolites and the aim of the present study was to isolate characterize such metabolites. Two pure compounds, 1 and 2 were isolated and the structures were identied. Compound 1 did not show any radical scavenging activity in DPPH assay. Compound 2, identied as 8-methoxynaphthalen-1-ol showed strong radical scavenging ability in the DPPH assay with a half maximal inhibitory concentration (IC50) of 10.2 ± 5.8 μg/ mL. The activity of compound 2 was higher than that of the standard, butylated hydroxy toluene (BHT).
M. A. T. P. Manthrirathna, R. Kandiah, D. S. Gunasekera, K. A. U. Samanthi, D. T. Welideniya, H. A. K. Maduranga, P. A. Paranagama
Journal of the National Science Foundation of Sri Lanka
Abstract :- http://doi.org/10.4038/jnsfsr.v48i2.10095
Endolichenic fungi are a group of micro fungi that resides asymptomatically within the thalli of lichens. Endolichenic fungi can be recognized as luxuriant metabolic artists that produce propitious bioactive secondary metabolites. Recognizing this timely need and the significance of endolichenic fungi as a promising source of antimicrobial compounds, the activity, sources and the structures of 31 antibacterial compounds, 58 antifungal compounds, two antiviral compounds and one antiplas- modial (antimalarial) compound are summarized in this review.
A. N. Wethalawe, Y. V. Alwis, D. N. Udukala and P. A. Paranagama
Molecules
Abstract :- https://doi.org/10.3390/molecules26133901
Obesity has become huge health problem in the entire world. In Sri Lanka, the prevalence of obesity is estimated to be 20.3% in men and 36.5% in women. Obesity is associated with osteoarthritis, obstructive sleep apnea, gall stones, and hiatus hernia. In addition to this obesity is related to numerous other problems, such as menstrual and mental disorders and varicose vein etc. The study described in this publication is related to the use of Unani herbal mixture to reduce women obesity and Study concluded that the intervention of ‘spice’ mixture reduces obesity and the effective mind calm exercises would give more beneficial effect in weight reduction.
M. I. Manuha, P. A. Paranagama, B. M. Nageeb, N. Z. Iqbal
Indian Journal of Traditional Knowledge
Fungal inhabitants in lichen thali are particularly referred as Endolichenic Fungi (ELF). These fungi are rich in novel unexplored metabolites and the aim of the present study was to isolate characterize such metabolites. We found a novel bioactive compounds named Neurosporalol 1 and 2 from an Endolichenic Fungus Neurospora ugadawe Inhabited in a Lichen Host from Mangrove Ecosystem in Puttalam lagoon in Sri Lanka. Neurosporalol 1 showed the highest antioxidant activity and Neurosporalol 2 showed comparable antioxidant and moderate anti-inflammatory activities.
H.A.K. Maduranga, W.R.H. Weerasinghe, R.N. Attanayake, S. Santhirasegaram, C.D. Shevkar, A.S. Kate, G. Weerakoon, K.A.U. Samanthi, K. Kalia and P. A. Paranagama
Asian Journal Of Chemistry
Abstract :- https://doi.org/10.14233/ajchem.2021.23229
The brinjal fruit and shoot borer attacks is a major pest in brinjal and spoils the brinjal fruits. The present study aims to develop natural pesticides using brinjal pest pheromone and volatiles constituents from brinjal plant. The results revealed that these volatiles can be used to prepare a trap of this pest and control the pest effectively.
M. S. F. Nusra, D. N. Udukala, L. D. Amarasinghe and P. A. Paranagama
Journal of Asia-Pacific Entomology
Abstract :- https://doi.org/10.1016/j.aspen.2021.06.002
The purpose of this paper is to reflect on the effects of online learning on student engagement as a result of a shift from face-to-face to online learning during the COVID-19 lockdown in New Zealand. The focus on social and teaching presence in online learning by Unitec academic staff had a positive impact on cognitive presence as student course success rates and course ratings were similar to rates achieved from face-to-face delivery despite a rapid transition to online learning.
A. Perera, L. Rainsbury and R.M.S. Bandara
Accounting Research Journal
Abstract :- https://doi.org/10.1108/ARJ-09-2020-0294
This paper aims to examine differential perceptions of lenders and investors. Lenders and investors rank three out of ten information sources ahead of the remaining seven: both include annual reports and personal knowledge. However, the highest average response for lenders is direct communication with clients, and for investors, it is stock market publications. Within annual reports, both decision-makers identify financial statements as the most useful part. They both identified understandability as the most important QC followed by timeliness. Relevance ranked last, surprisingly. Further, both groups perceived that the new IFRS reporting environment improved the FRQ compared to the previous Sri Lanka Accounting Standards regime.
R.M.S. Bandara and M. Falta
Asian Review of Accounting
Abstract :- https://doi.org/10.1108/ARA-03-2021-0058
This paper examines how the Sri Lankan artist S. P. Pushpakanthan captures the impact of war upon material objects. Pushpakanthan tries to situate objects that are touched by war as reflecting and reflected objects: as objects that allow us to ponder on how war destroys the totality of existence. The paper draws on Object-Oriented Ontology to discuss how objects can be treated as visual coda for violence, where we see how violence transforms various objects including the human mind and memory. The paper attempts to theorize the artist's thinking upon the objects that appear in his art.
S.A.P.M. Manuratne
South Asian Review
This article presents the design and development of a novel and innovative off-grid solar photovoltaic system with supercapacitor-battery hybrid energy storage, which is a part of an ongoing research at the Department of Physics and Electronics. The supercapacitor is a short-term energy storage device compared with electrochemical batteries. In this novel approach, we used the unique characteristics of supercapacitors to enhance the efficiency of off-grid solar photovoltaic systems. From the theoretical and experimental results observed from the developed system prototype, it was shown that the efficiency is enhanced by a further 8% compared with conventional systems.
P.L.A.K. Piyumal, A.L.A.K. Ranaweera, S.R.D. Kalingamudali, N. Kularatna
Electronics
Abstract :- https://doi.org/10.3390/electronics10192422
The objectives of this paper are to analyse the need for international accounting standards for SMEs and to investigate the institutional forces that drove the decision to adopt the accounting standard IFRS for SMEs by Sri Lankan SMEs.
Accordingly, this paper focusses on the following two questions:
Q1. Do Sri Lankan SMEs need international accounting standards?
Q2. What institutional pressures drove the decision to adopt the IFRS for SMEs?
N. Wijekoon , G. Samkin , U. Sharma
Meditari Accountancy Research
Abstract :- https://doi.org/10.1108/MEDAR-06-2020-0929
The research study investigated the metabolites in cooked rice samples collected from areas affected by chronic kidney disease and compared those with the rice samples collected from areas not affected by the disease. The results indicated that there were significant differences in some metabolites present in affected areas compared to controls.
T. D. Fernando, B. M. Jayawardena, Y. L. N. M. Arachchige
Chemosphere
This paper aims to explore how integrated reporting (IR) preparers manage the risk of disclosing future-oriented information in companies’ integrated reports. This study represents an exploratory interpretative thematic analysis of 33 semi-structured interviews with managers involved in IR in eight Sri Lankan companies representing various industries. This paper provides evidence of various strategies to manage the risk associated with the disclosure of future-oriented information in integrated reports. These strategies include making non-specific
predictions; increasing the accuracy of the predictions; linking performance management to disclosed targets, thus ensuring individual responsibility for target achievement; disclosing ex post explanations for not achieving previously disclosed targets; and linking disclosed targets to the company’s risk management procedures. However, these strategies can cause managers to provide conservative future-oriented information, rather than “best estimate” future-oriented information.
A. M. I. Lakshan, M. Low and C. de Villiers
Sustainability Accounting, Management and Policy Journal
Abstract :- https://doi.org/10.1108/SAMPJ-03-2019-0114
• Here, theoretically study the interaction of an ultrafast circularly polarized optical pulse with h-BN.
• The pulse redistributes electrons and generates valley-selective conduction band population.
• The fundamentally fastest valley polarization in h-BN monolayer has topological origin.
• For the large pulse duration, the valley polarization and conduction band population decrease.
• Valley polarization in h-BN may provide a basis for petahertz-band information processing.
Prof. Prabath Hewageegana
Physica E: Low-dimensional Systems and Nanostructures
Abstract :- https://doi.org/10.1016/j.physe.2021.114906
Recent population growth and actions near hilly areas increase the vulnerability of occurring landslides. Therefore, accurate analysis of unstable slope behavior is crucial to prevent loss of life and destruction to property. Predicting landslide flow path is essential in identifying the route of debris, and it is necessary component in hazard mapping.
However, current methodologies of determining the flow direction of landslides require costly site specific data such as surface soil type, categories of underground soil layers, and other related field characteristics. This paper demonstrates an approach to predict the flow direction without site- specific data, taking a large landslide incident in Sri Lanka at Araranyaka region in the district of Kegalle as a case study. The flow path generated by the model shows more than 87% agreement with actual flow path and other related statistics.
N. M. T. De Silva and P. Wimalaratne
International Journal of Advanced Computer Science and Applications(IJACSA)
Abstract :- http://dx.doi.org/10.14569/IJACSA.2020.0111015
This paper describes the plan to establish a register about children with cerebral palsy in Sri Lanka. The study will have two arms the hospital based and the community based. The paper outlines how data will be collected and what information about these children will be collected. Also it discusses the potential outcomes of the study to develop services for children with cerebral palsy on detection and intervention.
T. M. Heiyanthuduwage, S. P. Sumanasena, G. Kitnasamy, H. S. Sheedy, G. Khandaker, R. Fernando, S. Wijesekara,J. Jagoda, P. Ratnayake, J. Wanigasinghe, S. Mclntyre, S. Goldsmith, E. Waight, N. Badawi, M. Muhit, N. Muttiah
BMJ Open
Abstract :- http://dx.doi.org/10.1136/bmjopen-2020-039353
In this study they enhanced the efficiency of the sand surface for contaminant removal using graphite oxide coatings. And they did not use a binder in the fabrication of graphite-coated sand granules.
According to the new graphite oxide and sand composite can remove turbidity and fluoride in water, concurrently.
A. R. Kumarasinghe, W. P. R. T. Perera, J. Bandara, P. Rukshagini, L. Jayarathe, J. A. Liyanage, R. Tennakone, A. Bandara, X. CHEN, R. Weerasooriya
Journal of Environmental Chemical Engineering
Abstract :- https://doi.org/10.1016/j.jece.2020.104962
This study was conducted to develop essential oil treatment systems as eco-friendly strategies to control postharvest stem-end rot (SER) disease of Karthakolomban mango and to determine the pathogenicity of several SER associated fungi. Karthakolomban mango fruits were subjected to spray and fumigation treatments using four essential oils and their pathological, physicochemical and sensory properties were evaluated after a 8-day storage at 12 – 14 ºC. Spray and fumigation treatments conducted using basil, clove, cinnamon leaf and cinnamon bark oils effectively controlled SER of Karthakolomban mango stored at 12 – 14 ºC for 8 days without drastic alterations in physicochemical and sensory properties. Lasiodiplodia theobromae, Pestalotiopsis sp., Phomopsis sp. and Xylaria feejeensis were the major SER pathogens of mango, while X. feejeensis was identified as a SER pathogen for the first time in Sri Lanka.
T. D. Kodituwakku, K. Abeywickrama , K. O. L. C. Karunanayake
Journal of Agricultural Sciences – Sri Lanka
Abstract :- http://doi.org/10.4038/jas.v15i1.8669
Regardless of the immense efforts taken by the Vector Controlling Entities (VCE), dengue is remaining as a major health risk in Sri Lanka. Limitations in vector management, community participation and awareness has become the potential issues for handling the threat of dengue. Even though, Sri Lanka is being using larval indices to guide vector surveillance and controlling activities for decades, risk thresholds have not been defined to ensure the proper timing of chemical based vector control activities.
As a solution, this research article aims to determine the natural distribution of vector densities (in terms of larval indices) at the regional level and to establish threshold values for epidemic management based on an empirical modelling approach for the district of Kandy, Sri Lanka, which records the third highest dengue incidence in Sri Lanka. The defined targets are expected to assist responsible VCEs of Sri Lanka to assist community based activities for management of epidemic outbreaks and implement necessary precautions in order to minimize the risk of potential dengue outbreaks.
L. Udayanga, P.A.D.H.N. Gunathilaka, M.C.M. Iqbal, M. M. M. Najim, K. Pahalagedara & W. Abeyewickreme
Parasites & Vectors
Abstract :- https://doi.org/10.1186/s13071-018-2961-y
N. A. K. P. J. Seneviratne, N. Jayathilaka, C. M. Senanayake, H. Hapugaswatta and G. R. Samarawickrama
Journal of Food Biochemistry
Abstract :- https://doi.org/10.1111/jfbc.13664
T. D. Kodituwakku, G. C. M. Ekanayake, K. P. Abeywickrama and R. Jayakody
Journal of the National Science Foundation of Sri Lanka
Abstract :- http://doi.org/10.4038/jnsfsr.v48i2.8952
The study was supported by the National Science Foundation, Sri Lanka, UNESCO and the International Development Research Center, Ottawa, Canada under the Early Career Research Fellowship Grant awarded by the Organization for Women in Science for the Developing World (OWSD) and the University of Kelaniya.
Biomed Research International
Expression of Nitric Oxide Synthase and Nitric Oxide Levels in Peripheral Blood Cells and Oxidized Low-Density Lipoprotein Levels in Saliva as Early Markers of Severe Dengue
Abstract :- https://doi.org/10.1155/2021/6650596
Abstract :- https://doi.org/10.1186/s12929-020-0620-z
Among thin-film photovoltaic technology, CdS/CdTe based devices have achieved an impressive development that can commercially compete with silicon based solar cells, which is still have the highest market share. Laboratory scale CdS/CdTe based cells have reached efficiencies of ~22%, while its modules show efficiencies above 18%. Different deposition techniques in thin-film formation of CdS and CdTe have been reported and this paper disclosed the use of a cost effective and scalable deposition methods of chemical bath deposition (CBD) and electrodeposition (ED) techniques in formation of CdS and CdTe materials respectively. The report unveils the formation of CBD-CdS thin film material in highly alkaline medium which can staidly support the growth of ED-CdTe layer in a highly acidic medium. The article presents a new approach in fabrication of thin film CdS/CdTe solar cells.
G. K. U. P. Gajanayake, D. S. M. De Silva and H. Y. R. Atapattu
Materials Science and Engineering
Abstract :- https://doi.org/10.1016/j.mseb.2020.114952
Anaerobic Soil Disinfestation (ASD) has been recognized as a promising method of controlling soil borne plant pathogens. However, not much studies have been conducted in Sri Lanka and in other tropical countries. Possible modes of action ASD is also proposed.
The figure shows that, Proposed pathogen control mechanism(s) (simplified) during ASD.
A. K. H. Priyashantha and R. N. Attanayake
Pathogens
Abstract :- https://doi.org/10.3390/pathogens10020133
Chronic kidney disease of unknown etiology (CKDu) is an increasing global health issue and the exact risk factors are yet to be discovered. In our study, a computational approach was used to study the effects of pesticide and their metabolites on CKDu via investigating the interactions between vital renal enzymes and pesticides or metabolites. It was observed that some pesticides and metabolites bind at the active site or at regulatory sites of vital renal enzymes. Further, it was evident that some metabolites have higher binding interactions with considered renal enzymes compared to the parent pesticides. These findings shed light towards considering pesticide metabolites as a major risk factor towards CKDu.
H. Rajapaksha, D. R. Pandithavidana and J. N. Dahanayake
Biomolecules
Abstract :- https://doi.org/10.3390/biom11020261
Our study shows how streamflow at a weir site is changed when the natural flow is disturbed by a mini-dam (or weir) to collect water for a diversion away from the stream. This is a case from a natural stream where flow is diverted for mini-hydropower production. The study shows stream flow is changed due to this intervention and benthic macroinvertebrate communities in the stream is significantly differed above the weir (dam) and below the weir. This change in diversity of fauna (zoobenthic fauna) is due to change in water depth, dissolved oxygen content and volume flow rate both above and below the intervention. Our work provides evidence on the effects of interventions on river ecosystem in largely understudied regions. Studies like this are important to setting-up adequate environmental flows in natural streams.
M. M. M. Najim, D. S. N. Munasinghe, S. Quadroni and M. M. Musthafa
Scientific Reports
Abstract :- https://doi.org/10.1038/s41598-020-79576-5
R.M.T.B. Ranathunge, D.N. Kannangara, P.A.D.H.N. Gunatilaka, W. Abeyewickreme, M.D. Hapugoda
Journal of Vector Borne Diseases
Abstract :- https://doi.org/10.4103/0972-9062.308806
Dengue is one of the most important vector-borne infection in Sri Lanka and vector controlling is the best approach to control transmission of the disease. Development of Geographic Information System (GIS)-based multivariate analysis model to detect risk hotspots of dengue in the District of Gampaha was carried out. A risk model and spatial Poisson point process model were developed for four high risk areas. Results showed high risk localities are in close proximity to roads and coincide with vegetation coverage while the Poisson model highlighted the proximity of high intensity localities to public places and possibility of artificial reservoirs of dengue. Clustering of dengue cases in a radius of approximately 150 m in high risk areas need intensive attention in future vector surveillances.
The figure shows that Predicted point pattern intensity for dengue incidences in the study areas. High risk localities were illustrated in the yellow colour while the low risk localities were illustrated in the blue. Variation of intensity levels are scaled adjacently to the intensity map of the study areas. (A) Eriyawetiya; (B) Akbar Town; (C) 3rd Kurana; (D) Welikadamulla.
G. P. Withanage, M. Gunawardana, S. D. Viswakula, K. Samaraweera, N. S. Gunawardena and M. D. Hapugoda
Scientific Reports
Abstract :- https://doi.org/10.1038/s41598-021-83204-1
T. Mahalingam, C. S. K. Rajapakse, K. P. Somachandra & R. N. Attanayake
Tropical Plant Pathology
Abstract :- https://doi.org/10.1007/s40858-019-00315-x
This research focuses on querying the AFLOWLIB for a particular type of material known as half-metalic oxids which has only one type of conducting electrons. The repository hosts over 3 million investigations. After designing material descriptors we identified 223 strongly half-metallic oxides. A large number of these half-metallic oxides were not known to be half-metallic oxides. Based on the structure of these newly discovered half-metallic oxides we have revealed new crystal prototypes, which paves the way to design additional half-metallic oxides sharing the same structure. We believe that this study will stimulate further exploration of a larger chemical space as well as an ultimate confirmation of half-metallicity in selected structures.
L. S. I. Liyanage, J. Sławińska, P. Gopal, S. Curtarolo, M. Fornari and M. B. Nardelli
Molecules
Abstract :- https://doi.org/10.3390/molecules25092010
Even if the current research reveals that toxic metal contents in drinking water samples in CKDu endemic areas were far below the permissible limits, long-term exposure of the toxic metals via drinking water may generate a risk. Apart from that, the persistence of the harmful heavy metals/metalloids such as Cr, As, Cd, and Pb in frequently applying fertilizers would be the significant reason for paddy soil pollution with toxic metals/metalloids. Geoaccumulation indexes reveal that paddy soil in selected CKDu endemic areas is being transferred to a moderate contamination stage, and frequently, metal-contaminated fertilizer applications may augment the risk of entering toxic metals into the paddy plants and then rice grins from the soil solution. Hence, the long-term accumulation of toxic metals/metalloids definitely affects human kidney functions. There is an urgent need to expand the evaluation of the quality of the fertilizers’ use in Sri Lanka. Remediation of agricultural soil contaminated by heavy metals is necessary to reduce the associated health risks, make the land resource available for agricultural production, and enhance food.
W. P. R. T. Perera, M. D. N. R. Dayananda, D. M. U. C. Dissanayake, R. A. S. D. Rathnasekara, W. S. M. Botheju, J. A. Liyanage , S. K. Weragoda, and K. A. M. Kularathne
Journal of Chemistry
Abstract :- https://doi.org/10.1155/2021/6627254
A network provides a powerful means of representing complex relationships between entities by abstracting entities as vertices, and relationships as edges connecting vertices in a graph. In the majority of real-world applications, such as online social networks, financial networks and transactional networks, unusual changes may indicate potential fraudulent activities or intrusions. Change detection is a challenging problem because it involves a time series of graphs, each of which is a complex, high-dimensional object consisting of a large number of nodes, edges and attributes. In this paper, we combine spectral embedding techniques in linear algebra with statistical shape analysis techniques and propose a novel change detection algorithm. We apply our developed algorithm to both simulated and real world datasets to evaluate its performance. The results provide sufficient evidence to show the ability of our algorithm in detecting interesting change scenarios occurring in dynamic networks.
I. U. Hewapathirana, D. Lee, E. Moltchanova & J. McLeod
Social Network Analysis and Mining
Abstract :- https://doi.org/10.1007/s13278-020-0625-3
