Sökning: "Chromatography"

Visar resultat 16 - 20 av 1005 avhandlingar innehållade ordet Chromatography.

1. 16. Isocyanates, Amines and Alkanolamines : Sampling, Chromatography and Detection

   Författare :Jakob B. Riddar; Marianne Dalene; Gunnar Skarping; Daniel Karlsson; Håkan Westberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Air-sampling; Isocyanates; Aromatic amines; Aliphatic amines; Alkanolamines; Hydrophilic Interaction Liquid Chromatography; Dry Denuder-Filter sampler; Liquid Chromatography–tandem Mass Spectrometry; Polyurethane Foam Extraction; Analytical Chemistry; analytisk kemi;

   Sammanfattning : Isocyanates, aromatic-, aliphatic- and alkanolamines are commonly used in the industry today. Millions of workers in Europe are exposed. The most frequent health symptoms are respiratory and dermal disorder. Due to the health risk most of the compounds in this thesis are regulated by authorities and have occupational exposure limits (OELs). LÄS MER

3. 17. Development of analytical methods for the determination of the small molecule component of complex biological systems

   Författare :Kristian Pirttilä; Mikael Hedeland; Curt Pettersson; Torbjörn Arvidsson; Thomas Moritz; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; metabolomics; data processing; peak characterization; algorithm; multivariate data analysis; chromatography; sequential columns; HILIC; RPLC; liquid chromatography; mass spectrometry; LC; MS; noise-induced hearing loss; NIHL; guinea pig; perilymph; method development; validation; R; C ; Analytical Pharmaceutical Chemistry; Analytisk farmaceutisk kemi;

   Sammanfattning : The research field of untargeted metabolomics aims to determine the relative abundance of all small metabolites in a biological system in order to find biomarkers or make biological inference with regards to the internal or external stimuli. This is no trivial aim, as the small metabolites are both vast in numbers and extremely diverse in their chemical properties. LÄS MER

4. 18. Design of robust preparative chromatography

   Författare :Marcus Degerman; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sensitivity analysis; optimization; modeling; preparative chromatography; Design space; Control Space; uncertainty analysis;

   Sammanfattning : This work presents a methodology for analyzing and optimizing preparative chromatographic processes. It uses a model-based approach to find the critical process parameters, analyze the control space and suggest a design space that can be registered with the regulatory agencies. LÄS MER

5. 19. A Model Based Approach to Robustness Analysis and Optimisation of Chromatography Processes

   Författare :Niklas Jakobsson; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemiteknik och kemisk teknologi; Chemical technology and engineering; Langmuir; SMA; Optimisation; Robustness; Chromatography; Prepartive process scale; Modelling;

   Sammanfattning : One of the major issues in the pharmaceutical industry today is the cost of development and validation of the production of the active pharmaceutical ingredients. The development, optimization and validation of a production plant have been dominated by an extensive experimental approach. LÄS MER

7. 20. Extraction and chromatography of bioactive compounds in complex samples using supercritical CO2 technology

   Författare :Said Alhamimi; Centrum för analys och syntes; []
   Nyckelord :Supercritical CO2; Chromatography; Extraction; Mass transfer; Solubility;

   Sammanfattning : Bioactive compounds found in plants have been of interest to man since ancient times. These compounds have the ability to modulate the metabolic processes in our bodies, which suggests that they may promote better health. Bioactive compounds vary in their chemical structure, polarity, stability and biological activity. LÄS MER