Sökning: "ethyl chloride"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden ethyl chloride.

  1. 1. Ethyl Cellulose Membranes used in Modified Release Formulations

    Författare :Johan Hjärtstam; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; osmotic pumping; water permeability; drug release; reflectivity; ethyl cellulose; degree of substitution; mechanical strength;

    Sammanfattning : Ethyl cellulose (EC) is a commonly used polymer in modified drug release formulations. The general aim of the present study was to investigate release mechanisms through non-porous EC membranes with hydroxypropyl methyl cellulose (HPMC) contents ranging from 0 to 30% by weight. LÄS MER

  3. 2. Non-Azeotropic Mixtures as Working Fluids in Heat Pumps: A theoretical and experimental study

    Författare :Marine Högberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HCFC123; HCFC124a; HCFC22; performance comparison; COP; non-azeotropic mixture; capacity; sensitivity analysis; HFC152a; heat pump; CFC114; ethyl chloride; experimental study; HCFC142b; two-stage cycle;

    Sammanfattning : Due to the fact that CFC (Chloro-Fluoro-Carbon) fluids will be forbidden as working fluids in heat pumps for environmental reasons, there is an urgent need for alternatives. As one alternative type of fluid, non-azeotropic mixtures have been suggested. This thesis deals with such mixtures. LÄS MER

  4. 3. Disposition of metallic mercury vapor and mercuric chloride in adult and fetal tissues : influence of pretreatment with ethyl alcohol, aminotriazole, selenium, and tellurium

    Författare :Amir Ibraheem Khayat; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; PHARMACY; FARMACI;

    Sammanfattning : .... LÄS MER

  5. 4. Chemical Derivatization in Combination with Liquid Chromatography Tandem Mass Spectrometry for Detection and Structural Investigation of Glucuronides

    Författare :Matilda Lampinen Salomonsson; Mikael Hedeland; Ulf Bondesson; Calle Nilsson; Uppsala universitet; []
    Nyckelord :Pharmaceutical chemistry; Derivatization; mass spectrometry; glucuronide; drug metabolism; increased sensitivity; structural investigation; 2-chloro-1-methylpyridinium iodide CMPI ; 1-ethyl-3- 3-dimethylaminopropyl -carbodiimide EDC ; 2-picolylamine PA ; 1; 2-dimethylimidazole-4-sulfonyl chloride DMISC ; Farmaceutisk kemi;

    Sammanfattning : This thesis presents novel approaches for structural investigation of glucuronides using chemical derivatization in combination with liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MSn).Today, LC-ESI-MSn is the dominant technique for quantitative as well as qualitative analyses of metabolites, due to its high sensitivity and selectivity. LÄS MER

  7. 5. Synthesis and binding studies of 9,10-disubstituted anthracene and dibenzobarrelene-based receptors for recognition of carbohydrates in water

    Författare :Hans Grundberg; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; 2- trimethylsilyl ethyl sulfide; diastereoselectivity; water; carbohydrates; recognition; biomimetic; Artificial; receptor; Organic chemistry;

    Sammanfattning : Artificial, amfiphilic, and biomimetic receptors soluble in water were synthesized via attaching polar amino acids to hydrophobic back-bones possessing a surface suitable for hydrophobic interactions. The hydrophobic back-bones chosen in this thesis were anthracene and dibenzobarrelene structures. LÄS MER