Sökning: "Cold Stage"

Visar resultat 11 - 15 av 76 avhandlingar innehållade orden Cold Stage.

1. 11. Net-Shape Consolidation of Water-Atomised and Gas-Atomised Steel Powder Towards Full Density

   Författare :Anok Babu Nagaram; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hot isostatic pressing; high temperature sintering; sintering atmosphere; cold isostatic pressing; Powder metallurgy; Prealloyed with Cr PM steel; high density; PM steel;

   Sammanfattning : Powder metallurgy (PM) provides resource- and cost-efficient routes to create near-net shape products compared to conventional metal fabrication techniques. To improve the mechanical performance of PM steels, it is a prerequisite to enhance the density of the material. LÄS MER

3. 12. Changes in endogenous cytokinin-like substances in seeds during dormancy release and early germination

   Författare :Åsa Julin-Tegelman; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : From studies using non-dormant seeds, Zea mays L. and Phaseotus vulgaris L. transient peaks of endogenous cytokinin-like substances were observed after only 4 h of imbibition. LÄS MER

4. 13. Palsa Growth and Decay in Northern Sweden : Climatic and Environmental Controls

   Författare :Frieda S. Zuidhoff; Jonas Åkerman; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; ground thermal properties; palsas; permafrost degradation; peat porosity; Sweden; vegetation.; Geovetenskap; Earth sciences; Geovetenskap; naturgeografi; Physical Geography;

   Sammanfattning : This thesis outlines the development and decay of palsas in northern Sweden in relation to climatic and environmental factors. Palsas were investigated on morphology, vegetation, peat porosity, ground temperature and local climate in four bogs situated on a north-south gradient in northern Sweden. LÄS MER

5. 14. The chloroplast lumen proteome of Arabidopsis thaliana

   Författare :Maria Schubert; Wolfgang Schröder; Eva-Maria Aro; Södertörns högskola; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Photosynthesis; chloroplast; thylakoid lumen; Arabidopsis thaliana; proteome;

   Sammanfattning : In plants, the chloroplast organelles host the photosynthetic machinery, which catalyzes the conversion of light energy to chemical energy used for synthesis of carbohydrates. Inside the chloroplast, the lumen compartment forms an integral part of the thylakoid network that performs the light reactions of photosynthesis. LÄS MER

7. 15. Heat transfer through a well insulated external wooden frame wall : an investigation of the effects of normal defects in the insulation resulting from incident wind and air flow through the wall

   Författare :Peter Roots; Avdelningen för Byggnadsfysik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building construction; Electrical conduits.; Nogging pieces; Airgaps; Breaks in the insulation; Variations in the insulation; Through wind; Forced convection; Incident wind; Byggnadsteknik;

   Sammanfattning : The heat requirement of a building can turn out to be greater than was calculated at the design stage. The reason for this may be that heat transport though the building envelope is greater than expected. This in turn can be due to the structure not fulfilling the design requirements in respect of windtightness and airtightness. LÄS MER