Search for dissertations about: "chill"

Showing result 1 - 5 of 13 swedish dissertations containing the word chill.

  2. 1. Genetically Engineered Plants: Improved stress tolerance, growth and facilitated protein purification

    Author : Gösta Lilius; Tillämpad biokemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; glycine betaine; gene; freezing; flooding; drought; dicoteledones; desiccation; compatible solutes; cold; choline dehydrogenase; chill; CDH; betaine; betA; alkaloids anoxia; affinity purification; affinity tags; handles; hemoglobin; hypoxia; low temperatu; Biotechnology; Bioteknik;

    Abstract : Heterologous genes were expressed in plants in which the overall goal was to increase the value of the final crop. Various aspects were explored and evaluated, such as improving the stress tolerance, enhancing the availability of oxygen in growing cells and producing rare proteins with increased degrees of purity. READ MORE

  4. 2. Tread Braking of Railway Wheels - Noise-related Tread Roughness and Dimensioning Wheel Temperatures

    Author : Tore V Vernersson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rail chill; block material; temperature; heat partitioning; railway; corrugation; thermoelastic analysis; tread braking; noise;

    Abstract : Block braking is a commonly used braking system for freight wagons and other types of railway vehicles. One or several brake blocks are pressed against the tread (running surface) of the wheel, which is also in rolling contact with the rail. READ MORE

  5. 3. Understanding surface defects on direct chill cast 6xxx aluminium billets

    Author : Mikael Erdegren; Torbjörn Carlberg; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium; billets; DC casting; segregation; surface defects; vertical drags; Bridgman furnace; dewetting; non-wettable; nanocomp; Metcast ST20; graphite ring; titanium-butoxide;

    Abstract : .... READ MORE

  6. 4. Railway tread braking temperatures - Numerical simulation and experimental studies

    Author : Shahab Teimourimanesh; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; railway tread braking; finite element analysis; railway wheels; rail chill; hot spots; frictional heating; heat partitioning; metro; field experiment; rig experiment;

    Abstract : Tread (block) braking is still one of the most common braking systems on railway vehicles. The action is carried out by pressing brake blocks against the tread of a wheel, which is also in rolling contact with the rail. READ MORE

  7. 5. The Effect of Processing Parameters and Alloy Composition on the Microstructure Formation and Quality of DC Cast Aluminium Alloys

    Author : Majed Jaradeh; Torbjörn Carlberg; Lars Arnberg; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium wrought alloys; AA3xxx and 6xxx; Direct Chill Casting; Unidirectional Solidification; Bridgman technique; Process parameters; Microstructure; Composition modification; Thermal analysis; Inclusions; Metallographical investigations; Metallurgical process engineering; Metallurgisk processteknik;

    Abstract : The objective of this research is to increase the understanding of the solidification behaviour of some industrially important wrought aluminium alloys. The investigation methods range from direct investigations of as-cast ingots to laboratory-scale techniques in which ingot casting is simulated. READ MORE