Sökning: "speciation analysis"
Visar resultat 21 - 25 av 73 avhandlingar innehållade orden speciation analysis.
21. ARSENIC REMOVAL BY PHYTOFILTRATION AND SILICON TREATMENT : A POTENTIAL SOLUTION FOR LOWERING ARSENIC CONCENTRATIONS IN FOOD CROPS
Sammanfattning : Use of arsenic-rich groundwater for crop irrigation can increase the arsenic (As) content in food crops and act as a carcinogen, compromising human health. Using aquatic plant based phytofiltration is a potential eco-technique for removing arsenic from water. LÄS MER
22. Adsorption of Metallic Ions onto Chitosan : Equilibrium and Kinetic Studies
Sammanfattning : Equilibrium isotherms and the adsorption kinetics of heavy metals onto chitosan were studied experimentally. Chitosan, a biopolymer produced from crustacean shells, has applications in various areas, particularly in drinking water and wastewater treatment due to its ability to remove metallic ions from solutions. LÄS MER
23. The evolutionary history of Geum (Rosaceae, Colurieae) : a study of ancient allopolyploid speciation
Sammanfattning : Allopolyploid speciation plays an important role in flowering plant evolution. Its contribution to diversity has been suggested to be significant in Geum. LÄS MER
24. Conservation Genetics and Speciation in Asian Forest Trees
Sammanfattning : Tropical forests are important because they are the home of millions of species at the same time as they perform ecosystem services and provide food, cash income and raw materials for the people living there. The present thesis elucidates questions relevant to the conservation of selected forest trees as it adds to the knowledge in the phylogeny, population structure, genetic diversity and adaptation in these species. LÄS MER
25. Effects of Post-Glacial Range Expansions and Population Bottlenecks on Species Richness
Sammanfattning : This thesis relates modern speciation theory to the effects of sudden changes in the range and size of populations. Special reference is made to the climatic oscillations during the Quaternary ice ages. LÄS MER