Sökning: "degradation"
Visar resultat 21 - 25 av 2419 avhandlingar innehållade ordet degradation.
21. Structural and biochemical insights into biosynthesis and degradation of N-glycans
Sammanfattning : Carbohydrates are a primary energy source for all living organisms, but importantly, they also participate in a number of life-sustaining biological processes, e.g. cell signaling and cell-wall synthesis. The first part of the thesis examines glycosyltransferases that play a crucial role in the biosynthesis of N-glycans. LÄS MER
22. Cellulose degradation in pulp fibers studied as changes in molar mass distributions
Sammanfattning : In this thesis, size-exclusion chromatography (SEC) of woodpolymers dissolved in lithium chloride/N,N-dimethylacetamide(LiCl/DMAc) has been used to characterize the molar massdistributions (MMD) of wood polymers in pulp fibers afterchemical degradation.Characterization of birch kraft pulps subjected to ozonedegradation and acid hydrolysis, respectively, rendereddifferent changes in the MMD. LÄS MER
23. Modification of Surface Properties Through Polymer Adsorption. Kinetics, Interaction, Degradation and Stability
Sammanfattning : The interfacial behaviour of polymers in relation to surface modification and polymer degradation was studied. In the first part the interfacial behaviour of amphiphilic poly(ethylene oxide)–poly(D,L-lactide) (EmLn) diblock copolymers at hydrophilic and hydrophobic substrates from aquous solution was studied. LÄS MER
24. Chemical Pollutants Released to the Marine Environment by Degradation of Plastic Debris
Sammanfattning : Since the beginning of the mass production in the 1940s, plastic has been manufactured in quickly increasing amounts. Plastic debris accumulates in the environment and lately much attention has been drawn to the pollution in the world’s oceans. LÄS MER
25. Temporal and spatial variations of soil degradation in Mwisanga Catchment, Kondoa, Tanzania
Sammanfattning : .... LÄS MER