Sökning: "size exclusion chromatography"

Visar resultat 26 - 30 av 61 avhandlingar innehållade orden size exclusion chromatography.

  1. 26. Influence of the degradation mechanism on the molecular weight changes for some degradable polymers

    Författare :Bengt Erlandsson; KTH; []
    Nyckelord :;

    Sammanfattning : The influence of degradation mechanism on molecular weightchanges was investigated for certain degradable polymers. Thepolymers investigated were modified low density polyethylene(LDPE), poly(ethylene-co-vinyl alcohol) (EVOH) and aliphatic polyesters. LÄS MER

  3. 27. Mass transfer challenges in wood decomposition

    Författare :Roujin Ghaffari; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; diffusion cells; kraft process; lignin; lignin transport;

    Sammanfattning : Even though the kraft cooking operation is more than 100 years old, the rate-determining step of this operation has not been fully elucidated. Recent studies point in the direction of mass transport of liberated lignin fragments from the fibers' walls into black liquor being influential in rate determination of kraft cooking. LÄS MER

  4. 28. Wheat quality under a climate spell : a focus on protein, physico-chemical and growth characteristics evaluated by innovatively combined approaches

    Författare :Sbatie Lama; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The quality of bread is largely determined by the gluten protein concentration and composition, both greatly influenced by environmental factors such as heat and drought. Future climate in Sweden is expected to fluctuate severely, affecting gluten proteins and the production of bread wheat, as well as future availability of food. LÄS MER

  5. 29. Low Molecular Weight Organic Acids and Their Aluminium Complexes in Forest Soils

    Författare :Patrick van Hees; F. C. Ugolini; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The significance of low molecular weight (LMW) organic acids and their aluminium (Al) complexes in soil solutions of podzolized soils was examined. Methods for the analysis of these compounds and complexes were developed, and the impact of these substances on the weathering and podzolization processes was studied. LÄS MER

  7. 30. Mass spectrometric studies of cellulose ethers

    Författare :Dane Momcilovic; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polymerteknik; biopolymers; Polymer technology; Analytisk kemi; Analytical chemistry; enzymatic depolymerisation; reductive amination; electrospray ionisation; cellulose ethers; MALDI; mass spectrometry;

    Sammanfattning : Cellulose based derivatives, such as cellulose ethers, today find many applications in a diverse range of fields. The numerous applications put high demands on the technological performance of the cellulose ethers. LÄS MER