Search for dissertations about: "low molecular weight organic acids"

Showing result 1 - 5 of 16 swedish dissertations containing the words low molecular weight organic acids.

2. 1. Low Molecular Weight Organic Acids and Their Aluminium Complexes in Forest Soils

   Author : Patrick van Hees; F. C. Ugolini; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : The significance of low molecular weight (LMW) organic acids and their aluminium (Al) complexes in soil solutions of podzolized soils was examined. Methods for the analysis of these compounds and complexes were developed, and the impact of these substances on the weathering and podzolization processes was studied. READ MORE

4. 2. Organic acids and siderophores in forest soil solution

   Author : Sara J M Holmström; Mittuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; acidification; aluminium; ash treatment; canopy tree; column switching; coniferous; DOC; HPLC-MC; hydroxamate; liming; low molecular weight; organic acids; podzol; porous graphitic carbon; siderophore; soil solution; Chemistry; Kemi;

   Abstract : .... READ MORE

5. 3. Capillary zone electrophoresis for the analysis of low molecular weight organic acids in environmental systems

   Author : Jessika Hagberg; Bert Allard; Stefan Karlsson; Anders Düker; Patrick van Hees; Örebro universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; capillary zone electrophoresis; capillary zone electrophoresis-electrospray ionization-mass spectrometry; low molecular weight organic acids; pKa; Chemistry; Kemi; Kemi; Chemistry;

   Abstract : Capillary zone electrophoretic (CZE) methods were developed to identify and quantify low molecular weight (LMW) organic acids in environmental samples. Sensitivity and selectivity were optimised by adapting the background electrolyte to the characteristics of analytes, and by using different modes of detection and injection. READ MORE

6. 4. Characterisation of organic materials from incineration residues

   Author : Inger Johansson; Anna Ledin; Örebro universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; ash; biofuel; waste; residues; MSWI; incineration; leaching; organic carbon; organic acids; polycyclic aromatic hydrocarbons; PAH; Chemistry; Kemi; Kemi; Chemistry;

   Abstract : The organic material present in incineration residues has been examined. Water leachable organic material was characterised and classified into hydrophilic and hydrophobic acids, neutrals and bases. Changes of the organic material during weathering were followed. READ MORE

7. 5. Bacterial use of allochthonous organic carbon for respiration and growth in boreal freshwater systems

   Author : Martin Berggren; Mats Jansson; Michael L. Pace; Umeå universitet; []
   Keywords : lakes; streams; boreal; bacterial respiration; bacterial production; bacterial growth efficiency; allochthonous organic carbon; low molecular weight compounds; naturgeografi; Physical Geography;

   Abstract : Aquatic systems worldwide receive large amounts of organic carbon from terrestrial sources. This ‘allochthonous’ organic carbon (AlloOC) affects critical physical and chemical properties of freshwater ecosystems, with consequences for food web structures and exchange of greenhouse gases with the atmosphere. READ MORE