Environmental factors controlling arsenic mobilization from sandy shallow coastal aquifer sediments in the Mannar Island, Sri Lanka

2019 ◽  
Vol 100 ◽  
pp. 152-159 ◽  
Author(s):  
Udara Amarathunga ◽  
Saranga Diyabalanage ◽  
U.G.C. Bandara ◽  
Rohana Chandrajith
Keyword(s):  
Sri Lanka ◽  
Environmental Factors ◽  
Coastal Aquifer ◽  
Arsenic Mobilization ◽  
Aquifer Sediments

scholarly journals EFFECT OF SOCIAL AND ENVIRONMENTAL FACTORS ON EXPRESSWAY CONSTRUCTION IN SRI LANKA

2021 ◽  
Author(s):  
H.L.P.U. Karunathilaka ◽  
◽  
K.A.K. Devapriya ◽  
V.G. Shanika ◽  
◽  
...  
Keyword(s):  
Sri Lanka ◽  
Environmental Factors ◽  
Construction Projects ◽  
Health And Safety ◽  
Feasibility Studies ◽  
Social Implications ◽  
Rock Blasting ◽  
Environmental Implications ◽  
Factors Affecting ◽  
Expressway Construction

Expressway construction projects are one of the crucial infrastructure projects for a country. Hence, assessment of environmental and social implications prior to initiation of the expressway construction project is vital. Thus, the research aims to analyse effect of social and environmental factors on expressway construction in Sri Lanka. Initially a comprehensive literature review was done to discuss on expressway construction in Sri Lanka and environmental and social implications of expressway construction in global context. The study followed a qualitative approach. Hence, four expert interviews were carried out to explore more on the same context limiting to Sri Lanka. Experts were selected from only on-going expressway project in Sri Lanka, central expressway project. Moreover, collected data were analysed through manual content analysis. The study findings highlighted viaduct construction, land acquisition and rock blasting as the major activities relating to environmental implications of the expressway construction projects. Thus, rational, logical, scientific, and technical selection of the routes is the most effective and efficient mean in minimizing adverse impacts. Hence planning of these activities should be done with due care by authorities only after proper feasibility studies. Further, major factors affecting social implications of the expressway construction have been identified as settlement, livelihood, public infrastructure and health and safety. Hence, resettlement action plans need to be updated to comply with the identified requirements through environmental and social factors.

scholarly journals The Factors Affecting Work Life Balance among Post Graduate Students in Eastern Province, Sri Lanka

2019 ◽  
pp. 1-9
Author(s):  
K. Suganya
Keyword(s):  
Sri Lanka ◽  
Environmental Factors ◽  
Organizational Factors ◽  
Work And Family ◽  
Work Life ◽  
Work Life Balance ◽  
Eastern Province ◽  
Life Balance ◽  
Post Graduate ◽  
The Impact

Balance in work and family life is an emerging challenge for both employees and employers. This study was conducted to assess the status of work life balance among post graduates in Eastern province. The first objective of the study was to find the level of individual, organizational and environmental factors of work life balance.The second objective of the study was to find out the level of work life balance, The third objective of the study was to explore the relationship among them. And the fourth objective was to explore the impact of individual, organizational and environmental factors on Work life balance among post graduates in Eastern province. By using questionnaires data were collected from 103 Post graduates who are following Post graduate program in Eastern University of Sri Lanka and South Eastern University of Sri Lanka and stratified sampling was used.  Data were analyzed and evaluated by using univariate and regression analysis. Findings of this study revealed that the individual factors, organizational factors and environmental factors were in high level among post graduates in Eastern province. At the same these three variables positively and significantly impact on Work life balance of post graduates.

scholarly journals Effect of well cleaning and pumping on groundwater quality of a tsunami-affected coastal aquifer in eastern Sri Lanka

2009 ◽  
Vol 45 (7) ◽  
Author(s):  
M. Vithanage ◽  
K. G. Villholth ◽  
K. Mahatantila ◽  
P. Engesgaard ◽  
K. H. Jensen
Keyword(s):  
Sri Lanka ◽  
Groundwater Quality ◽  
Coastal Aquifer

scholarly journals Evidence that interspecies Leishmania hybrids contribute to changes in disease pathology

2020 ◽  
Author(s):  
Patrick Lypaczewski ◽  
Greg Matlashewski
Keyword(s):  
Sri Lanka ◽  
Visceral Leishmaniasis ◽  
Environmental Factors ◽  
Cutaneous Leishmaniasis ◽  
Leishmania Donovani ◽  
Genome Sequences ◽  
Geographic Locations ◽  
Diploid Genome ◽  
Cutaneous Disease ◽  
Visceral Disease

AbstractBackgroundLeishmaniasis is a widespread neglected tropical disease present in over 90 countries with diverse pathologies associated with different species of Leishmania parasites transmitted by infected sand flies. Leishmania donovani causes visceral leishmaniasis, a highly virulent fatal infection of the visceral organs. Leishmania major and Leishmania tropica cause less virulent cutaneous leishmaniasis where the infection remains in the skin at the site of the sandfly bite. A major molecular epidemiological question is why some variants of L. donovani in Sri Lanka cause cutaneous disease rather than the typical visceral disease.MethodsWhole genome sequencing data for 684 L. donovani samples was used to perform sequence alignments and worldwide phylogenetic analyses to determine the source of the atypical L. donovani strains from Sri Lanka. L. donovani genome sequences originating from Sri Lanka were further analyzed for evidence of hybridization with other Leishmania species by determining the density of heterozygous alleles. Polymorphisms from potential Leishmania hybrids were used to reconstruct the parental genetic sequences to identify the potential parental species and quantify their genetic contribution through sequence comparison of the reconstructed parental sequences with all Old World Leishmania genomes.FindingsHere we show that L. donovani in Sri Lanka contains genes with widespread gene polymorphisms derived from African L. major and L. tropica genomes that were likely obtained as a result of diploid genome hybridization and recombination resulting in progeny with mosaic genomes. Furthermore, evidence is presented that multiple L. donovani hybrid parasites originating from visceral leishmaniasis endemic Africa have entered Sri Lanka yet visceral leishmaniasis remains non-existent raising the possibility that environmental factors favour the establishment of atypical L. donovani strains in Sri Lanka.InterpretationThe discovery of L. major and L. tropica genome sequences in L. donovani provides a compelling rationale how some L. donovani strains in Sri Lanka may be able to cause cutaneous rather than visceral leishmaniasis. The identification of L. donovani hybrid parasites in cutaneous leishmaniasis lesions provides a unique opportunity to investigate environmental and parasite genetic factors controlling disease epidemiology and pathogenesis.FundingCanadian Institutes of Health Research and Fonds de recherche du Québec – SantéResearch in contextEvidence before this studyDifferent Leishmania species parasites cause either benign cutaneous leishmaniasis or fatal visceral leishmaniasis. It is unknown why some variants of Leishmania donovani that typically causes visceral leishmaniasis in Asia and Africa can cause cutaneous leishmaniasis in specific geographic locations including Sri Lanka. Leishmania has a diploid genome and hybrid parasites have been identified in nature and generated experimentally. In the context of this study, hybrids are considered to be progeny derived from a single outcross event between two diverse parents. Uncertainty remains whether interspecies hybrids with visceral and cutaneous leishmaniasis causing species in nature are associated with different disease outcomes.Added value of this studyEvidence for genetic hybridization between visceral and cutaneous disease causing Leishmania species is described from Sri Lanka where cutaneous leishmaniasis is highly endemic yet there is no ongoing visceral leishmaniasis transmission. This provides a potential explanation how L. donovani can become attenuated for visceral disease and could help to identify geographic environmental factors associated with selection for parasite attenuation.Implications of all the available evidenceHybrid Leishmania parasites may be one source of atypical cutaneous leishmaniasis. Epidemiological studies are needed to determine why diverse L. donovani hybrid parasites have become ubiquitous in specific geographic locations where the incidence of cutaneous leishmaniasis is increasing. This has implications for understanding the genetic control of disease pathogenesis and for the prevention of cutaneous or visceral leishmaniasis locally and in neighboring countries.

Chemical controls on abiotic and biotic release of geogenic arsenic from Pleistocene aquifer sediments to groundwater

2016 ◽  
Vol 18 (8) ◽  
pp. 1090-1103 ◽  
Author(s):  
Elizabeth C. Gillispie ◽  
Erika Andujar ◽  
Matthew L. Polizzotto
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Arsenic Mobilization ◽  
Pleistocene Aquifer ◽  
Aquifer Sediments ◽  
Geogenic Arsenic

Co-cycling of arsenic, manganese, iron, and dissolved organic carbon govern the extent and mode of geogenic arsenic mobilization into groundwater.

Sign in / Sign up

Export Citation Format

Share Document