Sökning: "nitrogen iron"

Visar resultat 1 - 5 av 64 avhandlingar innehållade orden nitrogen iron.

  1. 1. Varved lake sediments and diagenetic processes

    Detta är en avhandling från Umeå : Ekologi, miljö och geovetenskap

    Författare :Veronika Gälman; Umeå universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Varved annually laminated lake sediment; diagenesis; varve appearance; iron; sulfur; chemical speciation; iron cycling; carbon; nitrogen; stabile isotopes; δ13C; δ15N; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Sammanfattning : Varved (annually laminated) sediments are of great interest for inference of past environmental conditions, as they provide dated records with high time resolution. After deposition, the sediment varves are affected by diagenesis; i.e., chemical, physical and biological changes that occur within the sediment. LÄS MER

  2. 2. Nutrition in the second year of life. Effects of different milk compositions on dietary intakes, growth and metabolism

    Detta är en avhandling från Department of Pediatrics, Lund University

    Författare :Johan Svahn; Lunds universitet.; Lund University.; [2001]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; protein intake; nitrogen; iron fortification; iron intake; growth; fatty acids; fat metabolism; fat intake; energy intake; dietary intake; blood lipids; cow´s milk; cholesterol; Amino acids; children; protein metabolism.; Pediatrics; Pediatri;

    Sammanfattning : Popular Abstract in Swedish Hur näringsbehovet tillgodoses skiljer sig mellan spädbarn och småbarn. Bröstmjölk och/eller modersmjölksersättning dominerar som källor till energi-och näringsintag under första levnadsåret. LÄS MER

  3. 3. Factors Related to the Formation of Gas Porosity in Grey Cast Iron: Investigation of Core Gas Evolution and Gas Concentrations in Molten Iron

    Detta är en avhandling från Chalmers University of Technology

    Författare :Jessica Orlenius; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; Gas porosity; grey iron; gas solubility; hydrogen; nitrogen; oxygen; core binders; green sand; gas evolution rate; gas volume; mould filling; gas absorption;

    Sammanfattning : Since gas porosity is a major casting problem, it is of greatest importance to increase the knowledge about the foundry process in order to minimise the presence of gas porosity and thereby improving the casting quality. Gas porosity is generally considered to originate from gases precipitated during solidification of iron and from entrained gas picked up by the metal during the mould filling. LÄS MER

  4. 4. Perspectives from a human-centred archaeology : Iron Age people and society on Öland

    Detta är en avhandling från Lund University

    Författare :Helene Wilhelmson; Lunds universitet.; Lund University.; [2017-03-15]
    Nyckelord :HUMANIORA; HUMANITIES; Osteology; bioarchaeology; Iron Age; Scandinavia; 3D; digital; Image Based Modeling; GIS; isotopes; Oxygen; Strontium; Carbon; Nitrogen; trophic level effect; fractionation; chronology; network; Virtual Taphonomy; human-centred archaeology; mortographies; dietary shift; integration; immigration; diet; migration; violence; burial; Viking Age; Öland; island;

    Sammanfattning : The objective of this study was to develop, test and evaluate a specifically defined interdisciplinary approach—the human-centred approach—as applied to a case study, Iron Age Öland. Four themes were selected to highlight different aspects of particular interest in Öland: taphonomy, diet, migration, and social organization. LÄS MER

  5. 5. Functional Models for Non-heme Mononuclear Iron Oxygenases

    Detta är en avhandling från Faculty of Natural Science and Department of Chemistry, Lund University

    Författare :Mainak Mitra; Lunds universitet.; Lund University.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bioinorganic chemistry; Iron; Oxygenases; Catalysis;

    Sammanfattning : Popular Abstract in Swedish Denna avhandling beskriver vissa funktionella syntetiska modeller av non-hem mononukleära järn oxygenas-enzymer. Sådana enzymer katalyserar ett brett spektrum av oxidationsreaktioner av biologisk relevans, som utnyttjar molekylärt syre. LÄS MER