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Visar resultat 1 - 5 av 37 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Development of methods for stereospecific synthesis of α- and β-D-fructofuranosides and β-D-glucuronic acid pyranosides and application of these methods in the assembly of bacterial polysaccharide structures

   Författare :Christian Krog-Jensen; Michael Bols; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; Organic Chemistry; organisk kemi;

   Sammanfattning : .... LÄS MER

3. 2. The influence of high temperature on the discoloration and degradation of carbohydrates and on hydrogen peroxide bleaching of spruce TMP

   Författare :Louise Logenius; Hans Höglund; Roland Agnemo; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Temperature; metal ions; cellulose; glucuronic acid; UV-Vis spectroscopy; spruce; TMP; hydrogen peroxide bleaching; spectroscopy; optical properties; Chemical engineering; Kemiteknik;

   Sammanfattning : When processing wood to obtain pulp, the fibers are subjected to high temperatureat moisture levels and to the influence of metal ions. Many process developmentshave resulted in utilization of higher temperatures that induce chemical reactionsin the wood fibers. This thesis deals with some aspects of using high temperaturesin pulping processes. LÄS MER

4. 3. Biological Functions of Iduronic Acid in Chondroitin/Dermatan Sulfate in Tumor and Brain Development

   Författare :Martin Thelin; Matrixbiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; iduronic acid; chondroitin sulfate; esophagus squamous cell carcinoma; cancer; MET receptor; dermatan sulfate; hepatocyte growth factor; DS-epimerase 2; DS-epimerase 1;

   Sammanfattning : Cell behavior such as migration and proliferation, especially during cancer development, are balanced by the surrounding environment. Complex polysaccharides called glycosaminoglycans (GAGs) are part of this environment and they are known to modulate tumor development. LÄS MER

5. 4. Formation of Iduronic Acid during Chondroitin/Dermatan Sulfate Biosynthesis

   Författare :Emil Tykesson; Lungbiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; GLYCOSAMINOGLYCAN; CHONDROITIN; DERMATAN; EPIMERASE; SULFOTRANSFERASE; GLYCOSAMINOGLYCAN; CHONDROITIN SULFATE; DERMATAN SULFATE; EPIMERASE; SULFOTRANSFERASE;

   Sammanfattning : All animals and some bacteria can synthesize linear polysaccharides with a backbone of repeating disaccharideunits, called glycosaminoglycans (GAGs). The GAGs are either attached to a protein core, as in proteoglycans (PGs), or exist as free polymer chains, as in hyaluronan. LÄS MER

7. 5. Liquid Chromatography-Mass Spectrometry as a Tool for Drug Metabolite Identification in Biological Fluids : With Application to Ketobemidone

   Författare :Ingela Sundström; Per Andrén; Douglas Westerlund; Monika Johansson; Uppsala universitet; []
   Nyckelord :Analytical chemistry; LC-MS MS; accurate mass measurement; drug metabolites; microdialysate; brain; fluorinated stationary phase; phenylboronic acid; retention mechanism; Analytisk kemi;

   Sammanfattning : Electrospray ionization (ESI) mass spectrometry (MS) in combination with liquid chromatography (LC) is an excellent tool for the identification of drug metabolites. Utilizing this hyphenated technique in combination with proper sample pretreatment, the metabolic pathways of the analgesic drug ketobemidone were investigated in human urine and rat microdialysate from blood and brain. LÄS MER