Search for dissertations about: "organic acid analysis"

Showing result 1 - 5 of 123 swedish dissertations containing the words organic acid analysis.

2. 1. Analysis of plant growth regulating substances

   Author : Barbro Andersson; Bo Jansson; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant regulators; phytohormones; pine; spruce; anther; abscisic acid; 3-indoleacetic acid; gibberellin Ag; N- 3-indoleacetyl -aspartic acid; dichlorophene; Amberlite XAD-7; identification; quantification; GC; HPLC; GC-MS; GC-MID; Hormoner;

   Abstract : Natural plant growth regulators (phytohormones) are a group of organic compounds which, in very small amounts, act as regulators of physiological processes in plants.Methods were developed for the analysis of phytohormones in samples from Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris (L. READ MORE

4. 2. Analysis of tracer molecules from organic aerosols - Application of liquid phase microextraction to aerosol analysis

   Author : Murtaza Hyder; Centrum för analys och syntes; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Liquid membrane extraction; Secondary organic aerosols; Enrichment; Tracers; Hollow fiber liquid phase microextraction; Biomass burning; Organic carbon;

   Abstract : Airborne particulate matter is well known because of its adverse impacts on human health and its role in climate processes. In order to understand completely the role of aerosols in atmosphere, their chemical composition is of basic importance. READ MORE

5. 3. Efficient Synthesis and Analysis of Chiral Cyanohydrins

   Author : Stina Lundgren; Christina Moberg; Ben Feringa; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; cyanohydrins; microreactor; polymersupported catalyst; ketonitriles; titanium; lanthanide; Lewis acid; Lewis base; Organic chemistry; Organisk kemi;

   Abstract : This thesis deals with the development of new methods for efficient synthesis and analysis in asymmetric catalysis. It focuses on the preparation of chiral cyanohydrins by enantioselective addition of cyanide to prochiral aldehydes. READ MORE

6. 4. Asymmetric transfer hydrogenation of ketones : Catalyst development and mechanistic investigation

   Author : Katrin Ahlford; Hans Adolfsson; Martin Wills; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Asymmetric catalysis; reduction; amino acid; rhodium; mechanistic investigation; kinetic study; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

   Abstract : The development of ligands derived from natural amino acids for asymmetric transfer hydrogenation (ATH) of prochiral ketones is described herein. In the first part, reductions performed in alcoholic media are examined, where it is found that amino acid-derived hydroxamic acids and thioamides, respectively, are simple and versatile ligands that in combination with [RhCp*Cl2]2 efficiently catalyze this particular transformation. READ MORE

7. 5. Structural and Conformational Studies of Oligo- and Polysaccharides

   Author : Mona Zaccheus; Göran Widmalm; Christina De Castro; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NMR spectroscopy; structural analysis; conformational analysis; carbohydrates; polysaccharides; organisk kemi; Organic Chemistry;

   Abstract : The focus of this thesis is to examine the structural properties of polysaccharides produced by bacteria, as well as the dynamic and conformational behavior of a synthetically derived oligosaccharide.The primary structures of the O-polysaccharide repeating units of four different Escherichia coli (E. READ MORE