Sökning: "pKa values"

Visar resultat 16 - 20 av 28 avhandlingar innehållade orden pKa values.

  1. 16. 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

  3. 17. Studies on phosphate ester cleavage and development of oligonucleotide based artificial nucleases (OBAN’s)

    Författare :Hans Åström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Five different Oligonucleotide Based Artificial Nuclease (OBAN) systems have been synthesized. OBAN's may be regarded as a development of traditional antisense methodology where inhibition of gene expression can be achieved by hybridizing a synthetic oligonucleotide to natural mRNA and thus inhibiting further translation into protein products. LÄS MER

  4. 18. Studier av 2-cykloaminoindener speciellt med hänsyn till prototropa omlagringar

    Författare :Ulf Edlund; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis is a short review of six papers (Papers 1-6,page 5) concerning studies of enamines from 2-indanones. The unusually stable 2-(N-pyrrolidyl)indene has been studied (Paper 2 ). As a base catalyst this enamine rearranges 1-methylindene to 3-methylindene with a lower rate constant compared with triethylamine. LÄS MER

  5. 19. Studies of native and Cd(II)-substituted carbonic anhydrases with special reference to their interaction with inhibitors

    Författare :Lena Tibell; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbonic anhydrase; Cd II ; 113-Cd II -NMR; inhibition; catalytic mechanism;

    Sammanfattning : The major aim of this work has been to gain further insights into the catalytic mechanism of carbonic anhydrase (carbonate hydro-lyase, EC 4.2.1.1). LÄS MER

  7. 20. Grafted Molecular Layers for Control of Surface Properties

    Författare :Gunnar Dunér; Andra Dédinaité; Stefan Zauscher; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The goal of this thesis work was to develop responsive surface grafted brushlayers for control of surface properties and to gain insights in the molecular mechanisms that control these properties. Three types of grafted layers were investigated, as outlined below. LÄS MER