Sökning: "density"

Visar resultat 1 - 5 av 3655 avhandlingar innehållade ordet density.

  1. 1. Density variations during solidification of lamellar graphite iron

    Detta är en avhandling från Jönköping : Jönköping University, School of Engineering

    Författare :Kristina Hellström; Högskolan i Jönköping.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; density; grey cast iron; measurements; modelling; densitet; gjutjärn; mätning; simulering;

    Sammanfattning : .... LÄS MER

  2. 2. Novel approaches for achieving full density powder metallurgy steels

    Detta är en avhandling från Jönköping : Jönköping University, School of Engineering

    Författare :Maheswaran Vattur Sundaram; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cr- and Mo-alloyed PM steels; vacuum sintering; high density; full density; hot isostatic pressing.; cold isostatic pressing; liquid phase sintering; master alloy; double pressing-double sintering; powder metallurgy steels; sintering; water atomised powder;

    Sammanfattning : Powder metallurgy (PM) is one of the most resource-efficient methods for manufacturing structural components with complex shapes. The utilisation of the metal powder to shape the components allows to minimise material waste and increase energy efficiency. LÄS MER

  3. 3. Challenges in Enzyme Catalysis - Photosystem II and Orotidine Decarboxylase A Density Functional Theory Treatment

    Detta är en avhandling från Stockholm : Fysikum

    Författare :Marcus Lundberg; Stockholms universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Chemistry Theoretical chemistry Quantum chemistry; NATURVETENSKAP Kemi Teoretisk kemi Kvantkemi; photosystem II; oxyl radical; manganese systems; orotidine decarboxylase; reaction mechanism; density functional theory;

    Sammanfattning : Possibly the most fascinating biochemical mechanism remaining to be solved is the formation of oxygen from water in photosystem II. This is a critical part of the photosynthetic reaction that makes solar energy accessible to living organisms. LÄS MER

  4. 4. Manganese and Iron Heterodimers and Homodimers in Enzymes : Insights from Density Functional Theory

    Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

    Författare :Katarina Roos; Stockholms universitet.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ribonucleotide reductase; manganese; iron; density functional theory; kemisk fysik; Chemical Physics;

    Sammanfattning : The enzyme ribonucleotide reductase (RNR) catalyzes the reduction of ribonucleotides to deoxyribonucleotides, the building blocks of DNA, and is essential for all organisms. Canonical class I RNR R2 proteins use a diiron cofactor to generate a tyrosyl radical, which is required for catalysis. LÄS MER

  5. 5. Processing Methods for Reaching Full Density Powder Metallurgical Materials

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Maheswaran Vattur Sundaram; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gas atomised powder; water atomised powder; high density powder metallurgical materials; high density; master alloys; liquid phase sintering; sintering; high velocity compaction; hot isostatic pressing; additive manufacturing;

    Sammanfattning : Powder metallurgy (PM) is one of the most cost effective methods for manufacturing structural components with complex shapes. Utilisation of the metal powder to shape the components allows to minimise material waste and increase energy efficiency. LÄS MER