Sökning: "Chiral separation"

Visar resultat 21 - 25 av 40 avhandlingar innehållade orden Chiral separation.

  1. 21. Chiral Liquid Crystalline Side-Chain Polymers. Design, Synthesis and Properties

    Författare :Magnus Svensson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lateral substituent; electro-optic; ferroelectric; molar mass; polymer; side-group; thin film; polysiloxane;

    Sammanfattning : The potential use of chiral liquid crystalline materials, low molar mass as well as polymers, in technical applications has been recognized for some decades now. A number of interesting phenomena based on the spontaneous ordering of the liquid crystal forming molecules are strong reasons for the research effort in this area. LÄS MER

  3. 22. Analytical Methods For Sports Drugs: Challenges and Approaches

    Författare :Hatem Elmongy; Magnus Ericsson; Leopold Ilag; Mikael Hedeland; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sports Drugs; Doping in Sports; Steroids; LC-MS MS; Chiral analysis; high-resolution mass spectrometry; Sample preparation; Biological samples; solid phase extraction; Analytical Chemistry; analytisk kemi;

    Sammanfattning : Drugs used to enhance human performance in sport competitions are prohibited by the world anti-doping association (WADA). Biological samples from athletes are continuously tested for adverse analytical findings regarding the identity and/or quantity of the banned substances. LÄS MER

  4. 23. Mass-spectrometry based survey of BMAA sources, distribution and transfer

    Författare :Nadezda Zguna; Leopold Ilag; Jonas Bergquist; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; BMAA; LC-MS MS; chiral analysis; seafood; toxins; Baltic Sea; derivatization; Analytical Chemistry; analytisk kemi;

    Sammanfattning : β-methylaminoalanine (BMAA) is a neurotoxic non-protein amino acid first isolated from cycad seeds in 1967. It is believed to be connected to neurodegenerative diseases such as Parkinson’s, Alzheimer’s and amyotrophic lateral sclerosis (ALS) and is a ubiquitous compound produced by cyanobacteria, diatoms and dinoflagellates. LÄS MER

  5. 24. Enantioseparation of drugs and related compounds using chiral mobile phase additives

    Författare :Ngoc Hang Huynh; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical chemistry; Farmaceutisk kemi; Pharmaceutical chemistry; Farmaceutisk kemi; analytisk farmaceutisk kemi; Analytical Pharmaceutical Chemistry;

    Sammanfattning : Neutral and anionic chiral mobile phase additives have been employed to separate enantiomers of drugs and related compounds using aqueous buffer solution and hydro-organic solvent mixtures as mobile phases.Ester derivatives of tartaric acid, e. g. LÄS MER

  7. 25. Phase separation, aggregation and gelation of a charged helixforming polysaccharide in aqueous salt solution

    Författare :Johan Borgström; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; polysaccharide; physical gel; ion binding; carrageenan; liquid crystal; polymer; Fysikalisk kemi;

    Sammanfattning : The phase behaviour and gelation of the anionic polysaccharide kappa-carrageenan (KC) in different salt solutions was studied. The specific site binding of certain anions and certain cations to the KC helix was used as a means of controlling the interactions. LÄS MER