Search for dissertations about: "solvent-free"

Showing result 1 - 5 of 34 swedish dissertations containing the word solvent-free.

  2. 1. Synthesis of Non-Natural Aromatic Amino Acids Derivatives Solvent-free reactions-Versatile building blocks-Galectin inhibitors

    Author : Erik Tullberg; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; Organic chemistry; Naturvetenskap; Natural science; Multivalent galectin inhibitors; Multifunctional molecules; Amino Acids; Solvent-free reactions;

    Abstract : This thesis deals with three topics concerning the synthesis of non-natural also known as unnatural amino acid derivatives. In the first, solvent-free reaction conditions for the Heck reaction were developed that were superior to previous conditions because the reaction time could be reduced and the work-up procedure simplified. READ MORE

  4. 2. Non-porous membrane extractions in contemporary analysis

    Author : Jan Norberg; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; extracting syringe; micro-porous membrane extraction; supported liquid membrane; solvent free; selectivity; clean-up; enrichment; Sample preparation; automation; Analytical chemistry; Analytisk kemi;

    Abstract : To meet the desirable characteristic for sample preparation in contemporary, i. e. automation, high enrichment, clean-up, selectivity and essential solvent free techniques, the use of non-porous membrane extraction techniques is addressed. READ MORE

  5. 3. Hydrolases as Catalysts for Green Chemistry and Industrial Applications - Esterase, Lipase and Phytase

    Author : Yasser Gaber; Bioteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HPLC-EAT; sustainable environment; mutation; metallo-enzyme; phytate; b-propeller; biodegraqdable; metrics; green chemistry; Novozym 435; CalB; solvent-free; kinetic resolution; Biocatalysis; rational design; PLE; esterase; clopidogrel; enantioselectivity;

    Abstract : The use of enzymes in industrial applications has been recognised for providing clean processes with minimal impact on the environment. This thesis presents studies on engineering of enzymes and enzyme-based processes in the light of green chemistry and environmental sustainability, and focuses on three hydrolases: esterase, lipase and phytase. READ MORE

  6. 4. Covalent Surface Modification of Degradable Polymers for Increased Biocompatibility

    Author : Martina Källrot; Ann-Christine Albertsson; Mikael Lindström; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Vapor phase grafting; covalent surface modification; solvent free; nano patterned topography; degradable polymers; poly ε-caprolactone ; poly L-lactide ; poly lactide-co-glycolide ; poly trimethylene carbonate ; N-vinylpyrrolidone; maleic anhydride; acrylamide; Gasfasympning; kovalent ytmodifiering; lösningsmedelsfri; nedbrytbara polymerer; nanomönstrad topografi; poly L-laktid ; poly ε-kaprolakton ; poly laktid-co-glykolid ; poly trimetylen karbonat ; N-vinylpyrrolidon; maleinsyraanhydrid; akrylamid; Polymer chemistry; Polymerkemi;

    Abstract : Degradable polymers have gained an increased attention in the field of biomedical applications over the past decades, for example in tissue engineering. One way of improving the biocompatibility of these polymers is by chemical surface modification, however the risk of degradation during the modification procedure is a limiting factor. READ MORE

  7. 5. New directions in non-porous membrane extraction

    Author : Eddie Thordarson; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; extracting syringe; solvent-free; miniaturisation; micro-porous membrane liquid-liquid extraction; polymeric membrane extraction; Non-porous membrane extraction; supported liquid extraction; integration; automation; Analytical chemistry; Analytisk kemi;

    Abstract : Complex biological and environmental samples require a high degree of selectivity in order to determine components therein. Sensitivity measures, such as analyte pre-concentration are often required for assessing composition quantitatively. READ MORE