Sökning: "Chemical potentials"

Visar resultat 21 - 25 av 138 avhandlingar innehållade orden Chemical potentials.

  1. 21. Oxidation of 1,2-Diols Using Alcohol Dehydrogenases : From Kinetic Characterization to Directed Evolution

    Författare :Cecilia Blikstad; Mikael Widersten; Stefan Lutz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; enzyme kinetics; alcohol dehydrogenase; directed evolution; enzyme engineering; diol; α-hydroxy aldehyde; Biokemi; Biochemistry;

    Sammanfattning : The use of enzymes as catalysts for chemical transformations has emerged as a “greener” alternative to traditional organic synthesis. An issue to solve though, is that enzymes are designed by nature to catalyze reactions in a living cell and therefore, in many cases, do not meet the requirements of a suitable biocatalyst. LÄS MER

  3. 22. Synthesis, properties and applications of chalcogen-containing antioxidants

    Författare :Jonas Malmström; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; Chemistry; Kemi; organisk kemi; Organic Chemistry;

    Sammanfattning : In the first part, the preparation and properties of chalcogen-containing vitamin E analogues are described. The sulfur compound 3,3,4,6,7-pentamethyl-2,3-dihydrobenzo[b]thiophene-5-ol was prepared by two different routes using ionic and radical chemistry. Interesting rearrangements were observed in the two synthetic pathways. LÄS MER

  4. 23. Dyes and their adsorption onto nanocrystalline TiO2 electrodes : Synthesis, characterisation and applications

    Författare :Viviane Aranyos; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; Chemistry; Kemi; organisk kemi; Organic Chemistry;

    Sammanfattning : The syntheses of two type of dyes (phthalocyanine and ruthenium tris-bipyridyl) are presented here. Their characterisation involves the use of cyclic voltammetry, NMR- and UV-visible spectroscopy. Once adsorbed on nanocrystalline TiO2 electrodes, their electrochemical, spectroelectrochemical and photoelectrochemical properties were investigated. LÄS MER

  5. 24. Voltammetric properties of olsalazine sodium and some related compounds

    Författare :Alf Eriksson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Olsalazine sodium; electrochemistry; oxidation; reduction; azosalicylic compounds; aminosalicylic acids; Kemi; Chemistry; Kemi; Analytical Chemistry; analytisk kemi;

    Sammanfattning : The voltammetric properties of Olsalazine sodium, seven other azosalicylic acids and the azoxy analogue of Olsalazine sodium have been studied in aqueous solutions mainly by cyclic voltammetry and constant potential coulometry. It was found that these compounds can all be both reduced and oxidised at a glassy carbon electrode. LÄS MER

  7. 25. Kinetics for oxidation of CRUD model compounds

    Författare :Maryam Abili Nejad; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; reactor chemistry; radiolysis; oxidation; kinetics; crud; metal oxide;

    Sammanfattning : The formation of CRUD (Chalk River Unidentified Deposit) inwater-cooled nuclear reactors constitute a severe problem. Thestability of CRUD under reactor conditions (high flux ofionizing radition, high temperature and pressure) must be knownin order to minimize the problem. LÄS MER