Sökning: "Michael Larsson"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden Michael Larsson.

1. 1. Bacterial adhesion to polyelectrolyte modified materials based on nanocellulose

   Författare :Jonatan Henschen; Lars Wågberg; Per Larsson; Josefin Larsson; Aji Mathew; Michael Malkoch; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bacterial adhesion; cellulose nanofibrils; polymer adsorption; polyvinylamine; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Since the introduction of materials based on cellulose nanofibrils (CNFs), these materials have been studied extensively and are suggested to be suitable for use in, for example, hygiene and health care products. A property not very well studied but that could further increase the usability of CNF products is the possibility of controlling bacterial adhesion to the materials. LÄS MER

3. 2. Natural products from nonracemie building blocks : synthesis of pine sawfly pheromones

   Författare :Michael Larsson; Torbjörn Norin; Gunnar Westman; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Total synthesis; diastereoselective addition; dimethylzinc; Lewis acid; alkyllithium; Organisk kemi; Organic chemistry; Organisk kemi;

   Sammanfattning : This thesis describes a number of synthetic approaches for obtaining chiral, enantiomerically pure natural products, in particular some semiochemicals. This has been accomplished by using various strategies; by starting from compounds from the chiral pool, by using chiral auxiliaries, via enzymatic resolutions or by chemical asymmetric synthesis. LÄS MER

4. 3. Timber-concrete hybrid structural systems : Examples, long and short-term dynamic monitoring, and numerical analysis

   Författare :Carl Larsson; Michael Dorn; Åsa Bolmsvik; Thomas K. Bader; Henrik Danielsson; Linnéuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Timber-Concrete Hybrid Structures; Timber Design; Structural Dynamics; Structural Health Monitoring; Byggteknik; Civil engineering;

   Sammanfattning : Timber-concrete hybrid buildings are an innovative solution to increase the amount of timber materials in modern buildings. Due to its lower impact on the environment than materials like steel and concrete, the demand for timber products is rising as the construction industry aims to decrease its environmental footprint. LÄS MER

5. 4. Electron transport in quaternized cross-linked poly(4-vinylpyridine) films containing trapped redox molecules : experimental and theoretical aspects that concern identification of electron translation mechanisms

   Författare :Henrik Larsson; Michael Sharp; Marcin Majda; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; charge transport; polymer film; Analytical Chemistry; analytisk kemi;

   Sammanfattning : This thesis deals with the identification of electron translation mechanisms in quaternized cross-linked poly(4-vinylpyridine) films containing trapped redox molecules. Experimental aspects, such as the determination of the total amounts of electroactive species within the films, measurements of electrochemical rate parameters and ellipsometric film thickness  evaluation, are discussed together with theoretical models that predict different mechanisms of charge transport. LÄS MER

7. 5. Study of High Efficiency Phase-Only Diffractive Optical Elements

   Författare :J. Michael Larsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; array illuminators; computer generated phase holograms; computer simulations; diffractive bifocal intraocular lenses; kinoforms; design; manufacture; diffractive optical elements; evaluation; simulation;

   Sammanfattning : This work deals with the design, simulation, manufacture, and evaluation of diffractive optical elements. Particularly, kinoforms and diffractive bifocal intraocular lenses are studied. Evaluation of kinoforms, i.e. LÄS MER