Sökning: "aldehydes"

Visar resultat 1 - 5 av 129 avhandlingar innehållade ordet aldehydes.

  1. 1. Development of organocatalytic asymmetric transformations

    Detta är en avhandling från Stockholm : Institutionen för organisk kemi

    Författare :Ismail Ibrahem; Stockholms universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymmetric Catalysis; α-amino acids; Aldehydes; Ketones; α-Aminomethylation; Aziridination; Hydrophosphination; Diarylprolinol; Proline derivatives; NATURAL SCIENCES Chemistry Organic chemistry Organic synthesis; NATURVETENSKAP Kemi Organisk kemi Organisk syntes; Organic Chemistry; organisk kemi;

    Sammanfattning : The ability of amino acids and amino acid derivatives to mediate various organocatalytic asymmetric transformations has been investigated and applied in the development of various reactions. This work describes the development of a direct catalytic asymmetric α-aminomethylation of ketones and aldehydes, a catalytic asymmetric aziridination, hydrophosphination and amination of α,β-unsaturated aldehydes. LÄS MER

  2. 2. Oxidation of marine oils during in vitro gastrointestinal digestion and its effects on stress in human intestinal Caco-2 cells

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Cecilia Tullberg; [2017]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; lipid oxidation; human digestive fluids; LC n-3 PUFAs; Caco-2 cells; marine oils; HNE; MDA; in vitro digestion; HHE; gastrointestinal; aldehydes;

    Sammanfattning : Marine oils are attracting public interest due to the preventive effects, e.g., on inflammation, which are linked to the long-chain n-3 polyunsaturated fatty acids (LC n-3 PUFAs). However, LC n-3 PUFAs are highly susceptible to oxidation, which could interfere with their positive effects. LÄS MER

  3. 3. Oxidation of fish lipids during gastrointestinal in vitro digestion

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Karin Larsson; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TBARS; HHE; salmon; lipids; TIM; fish; HNE; in vitro digestion; gastrointestinal; aldehydes; cod liver oil; n-3 PUFA; herring; lipid oxidation; MDA;

    Sammanfattning : Fish and many other marine organisms, contain long chain n-3 polyunsaturated fatty acids (LC n-3 PUFA), e.g. eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). EPA and DHA has shown beneficial effects in diseases related to inflammatory processes, such as cardiovascular diseases. LÄS MER

  4. 4. Development of catalytic enantioselective C-C bond-forming and cascade transformations by merging homogeneous or heterogeneous transition metal catalysis with asymmetric aminocatalysis

    Detta är en avhandling från Sundsvall : Mid Sweden University

    Författare :Samson Afewerki; Mittuniversitetet.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; transition metals; aldehydes; heterogeneous catalysis; amino acid; organocatalysis; α-allylation; β-alkylation; dynamic transformations; polysubstituted; carbocycles; spirocyclic oxindoles; all-carbon quaternary stereocenters;

    Sammanfattning : Chiral molecules play a central role in our daily life and in nature, for instance the different enantiomers or diastereomers of a chiral molecule may show completely different biological activity. For this reason, it is a vital goal for synthetic chemists to design selective and efficient methodologies that allow the synthesis of the desired enantiomer. LÄS MER

  5. 5. Development of highly enantioselective organocatalyzed transformations

    Detta är en avhandling från Sundsvall : Mid Sweden University

    Författare :Palle Breistein; Mittuniversitetet.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymetric catalysis; aldehydes; proline derivatives; transition metals; Friedel-Crafts; conjugate addition; boration; ?-alkylation;

    Sammanfattning : .... LÄS MER