Search for dissertations about: "acid sulphate"

Showing result 1 - 5 of 58 swedish dissertations containing the words acid sulphate.

  2. 1. Phase transformation and surface chemistry of secondary iron minerals formed from acid mine drainage

    Author : Jörgen Jönsson; Lars Lövgren; Per Persson; Staffan Sjöberg; Douglas B Kent; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; schwertmannite; goethite; lepidocrocite; acid mine drainage; sulphate; natural organic matter; mineral surface; infrared spectroscopy; EXAFS; XRD; ternary surface complex; copper II ; cadmium II ; lead II ; zinc II ; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : The mining of sulphidic ore to extract metals such as zinc and copper produces huge quantities of waste material. The weathering and oxidation of the waste produces what is commonly known as Acid Mine Drainage (AMD), a dilute sulphuric acid rich in Fe(II) and heavy metals. READ MORE

  4. 2. Formic and Levulinic Acid from Cellulose via Heterogeneous Catalysis

    Author : Johan Ahlkvist; Jyri-Pekka Mikkola; Riitta Keiski; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Levulinic acid; formic acid; Amberlyst 70;

    Abstract : The chemical industry of today is under increased pressure to develop novel green materials, bio-fuels as well as sustainable chemicals for the chemical industry. Indeed, the endeavour is to move towards more eco-friendly cost efficient production processes and technologies and chemical transformation of renewables has a central role considering the future sustainable supply of chemicals and energy needed for societies. READ MORE

  5. 3. Development and application of strategies for the analysis of modification patterns in chondroitin and dermatan sulphate

    Author : Fang Cheng; Institutionen för experimentell medicinsk vetenskap; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biochemistry; reumatologi; muskelsystem; Skelett; Glycosaminoglycan; Proteoglycan; Chondroitin sulphate; dermatan sulphate; Sequencing analysis; Modification pattern.; Skeleton; rheumatology locomotion; muscle system; Metabolism; Biokemi; metabolism;

    Abstract : Chondroitin (CS) and dermatan sulphate (DS) are socalled glycosaminoglycans (GAG) that are covalently attached to various type of proteins forming a subgroup within the diverse proteoglycan (PG) family. The PGs studied in this thesis are mostly extracellularly located and include aggrecan, biglycan and decorin. READ MORE

  6. 4. Injectable calcium sulphate and calcium phosphate bone substitutes

    Author : Malin K Nilsson; Lund Ortopedi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; traumatologi; ortopedi; Kirurgi; Surgery; orthopaedics; traumatology; resorbable; hydroxyapatite; bone substitute; calcium phosphate; injectable; calcium sulphate;

    Abstract : Two formulations of biphasic injectable bone substitutes have been developed for the treatment of bone defects and stabilisation of fragility fractures. The first formulation consists of a calcium sulphate matrix with embedded hydroxyapatite (HA) particles to provide osteoconductivity. READ MORE

  7. 5. Biosynthesis of Dermatan Sulphate. Enzymatic mechanism and role of cytokines

    Author : Kerstin Tiedemann; Institutionen för experimentell medicinsk vetenskap; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Dermatan sulphate; 4-O-sulfotransferase; Co-polymeric structure; biglycan; decorin; Biochemistry; Biokemi; C5-epimerase; Metabolism;

    Abstract : Dermatan sulphate is a prominent feature of several different proteoglycans and occurs in almost every tissue of the body. It is an unbranched polymer containing the repeating disaccharide unit of N-acetylgalactosamine and D-glucuronic acid or L-iduronic acid. READ MORE