Sökning: "extended surfaces"

Visar resultat 1 - 5 av 127 avhandlingar innehållade orden extended surfaces.

1. 1. Tailormade Surfaces for Extended CE Applications

   Författare :Sara Ullsten; Karin Markides; Staffan Folestad; Gerhardus J de Jong; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; capillary electrophoresis; mass spectrometry; surface properties; coatings; polymers; liposomes; proteins; drugs; Analytisk kemi; Analytical chemistry; Analytisk kemi;

   Sammanfattning : The combination of capillary electrophoresis (CE) and mass spectrometry (MS) constitutes a powerful microanalytical system in the fields of biology, medicine and chemistry. This thesis describes the development of three novel capillary coatings and demonstrates how these extend the utility of CE as a high-efficiency separation technique in protein analysis and biopharmaceutical drug screening. LÄS MER

3. 2. Numerical Investigation of Some Heat Transfer Topics with Relevance to Gas Turbines

   Författare :Arash Saidi; Värmeöverföring; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vakuumteknik; Maskinteknik; vacuum technology; vibration and acoustic engineering; hydraulics; Mechanical engineering; plasma; fluiddynamik; Gaser; Ribbed ducts; intercoolers; EASM; EVM; gas turbine; CFD; heat exchangers; extended surfaces; offset strip fin; heat transfer enhancement; Thermal engineering; applied thermodynamics; Termisk teknik; hydraulik; termodynamik; Gases; plasmas; fluid dynamics; vibrationer; akustik;

   Sammanfattning : The first part of the investigation is related to the heat transfer and fluid flow problem inside ribbed ducts with a square cross section. The typical applications of this problem are in the cooling of gas turbine blades and guiding vanes. The second part is related to application of intercoolers in gas turbine systems. LÄS MER

4. 3. Kraft Pulp Fibre Surfaces. Chemical Composition and Effect on Pulp Bleachability

   Författare :Anette Heijnesson Hultén; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ray cells; carbohydrates; Kraft pulps; enzymes; lignin; fibre surfaces; metal ions; bleachability;

   Sammanfattning : The work presented in this thesis concerns studies of kraft fibre surfaces in respect of chemical composition and effect on pulp bleachability. Kraft fibre surfaces were studied by mechanical peeling using a disintegrator operated at 20.000-200.000 revolutions and a pulp consistency of 3% or 4. LÄS MER

5. 4. On various aspects of extended objects

   Författare :Mariusz Hynek; Jens Hoppe; Volker Bach; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

   Sammanfattning : This thesis concerns classical and quantum aspects of minimal manifolds embedded in flat Minkowski space. In particular, we study the Lie algebra of diffeomorphisms on 2 dimensional compact manifolds as well as discuss singularity formation for relativistic minimal surfaces in co-dimension one. LÄS MER

7. 5. Physisorption of CO and N2O on ceria surfaces

   Författare :Carsten Müller; Kersti Hermansson; Konstantin Neyman; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ceria; carbon monoxide; nitrous oxide; embedded cluster; physisorption; method of increments; CCSD T ; vibrational frequencies; Quantum chemistry; Kvantkemi; Quantum Chemistry; kvantkemi;

   Sammanfattning : Physisorption of CO and N2O on surfaces of ceria (CeO2) was investigated by means of high-level quantum-mechanical embedded cluster calculations. Both systems have high relevance in the field of environmental chemistry and heterogeneous catalysis. LÄS MER