Sökning: "membrane extraction"

Visar resultat 1 - 5 av 67 avhandlingar innehållade orden membrane extraction.

  1. 1. Membrane extraction in bioanalysis

    Detta är en avhandling från Stockholm : Stockholm University

    Författare :Ove Jonsson; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Membrane extraction; bioanalysis;

    Sammanfattning : .... LÄS MER

  2. 2. New directions in non-porous membrane extraction

    Detta är en avhandling från Department of Analytical Chemistry, Lund University

    Författare :Eddie Thordarson; [2000]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 3. On-line Sample Pretreatment Based on Membrane Enrichment, Mainly Using Supported Liquid Membranes, for Chromatographic Analysis

    Detta är en avhandling från Department of Analytical Chemistry, Lund University

    Författare :Yin Shen; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biological Sample; Environmental Sample; Capillary Gas Chromatography; Ion Chromatography; Automation; Sample Pretreatment; Enrichment; Membrane; Extraction; Analytical chemistry; Analytisk kemi;

    Sammanfattning : The main objective of this work was to construct practical analytical systems for the analysis of environmental and biological samples, using membrane-based techniques for sample pretreatment and chromatography for final analysis. Two types of membrane processes have been applied, with emphasis on automation. LÄS MER

  4. 4. Surface Sampling and Automated Liquid Membrane Extraction of Fungicides

    Detta är en avhandling från Department of Analytical Chemistry, Lund University

    Författare :Margareta Sandahl; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; natural water analysis; microporous membrane liquid-liquid extraction MMLLE ; supported liquid membrane SLM extraction; Dislodgeable fungicide residues; surface sampling; automated sample preparation for HPLC; Analytical chemistry; Analytisk kemi;

    Sammanfattning : A number of approaches for fungicide determination are presented. A surface sampling technique is utilised for the determination of fungicide foliar residues on greenhouse surfaces, mainly leaves. The procedure is based on solvation of the fungicides on the leaf surface with ethanol and HPLC analysis. LÄS MER

  5. 5. Cholesterol in T cells homeostasis, plasma membrane organization and signaling

    Detta är en avhandling från Stockholm : The Wenner-Gren Institute, Stockholm University

    Författare :Saleemulla Mahammad; Ingela Parmryd; Thomas Harder; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plasma membrane; T cells; Cholesterol; Lipid rafts; Membrane organization; Cholesterol homeostasis; cholesteryl esters; NATURAL SCIENCES Biology Cell and molecular biology Cell biology; NATURVETENSKAP Biologi Cell- och molekylärbiologi Cellbiologi; Cell Biology; cellbiologi;

    Sammanfattning : The plasma membrane of eukaryotic cells contains cholesterol and glycosphingolipids enriched nanodomains known as lipid rafts; which are believed to exist in a liquid ordered (lo) state. Methyl-beta-cyclodextrin (MBCD) is used to deplete cellular cholesterol and a widespread assumption is that MBCD preferentially targets cholesterol in lipid rafts. LÄS MER