Search for dissertations about: "crystal sphere"

Showing result 1 - 5 of 14 swedish dissertations containing the words crystal sphere.

  2. 1. Low phase noise voltage controlled micro- and millimeter wave oscillators

    Author : Stefan Andersson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; radio; anti series; microstrip resonator; silicon bipolar transistor; amplitude limiter; cavity resonator; varactor; transposed gain; MESFET; automatic gain control; VCO; delay line; laser; RF; oscillation criteria; millimetre wave; oscillator; mm-wave; noise; multiplier; fibre optic; SAW; DRO; PLL; surface acoustic wave; Si BJT; 1 f noise; FM noise; HEMT; clipping diode; HBT; YIG sphere; device; terfenol; gunn diode; stabilised; YIG film; quarts crystal; phase locked loop; magnetostrictive; resonator; phase error; whispering gallery mode; sapphire resonator; Fabry-Perot resonator; PHEMT; microwave; HFET; phase noise; DR; dielectric resonator; PM noise; balanced oscillator; piezo electric; AGC; frequency discriminator;

    Abstract : .... READ MORE

  4. 2. Calculation of magnetism and its crystal structure dependence

    Author : Peter James; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

    Abstract : The subject of the present thesis is a theoretical investigation of magnetism and its crystal structure dependence by means of electronic-structure calculations from first principles. The theoretical treatment is based on density functional theory and the so called linear muffin-tin orbital method is used in its full-potential version as well as in an atomic sphere approximation. READ MORE

  5. 3. The structural basis for the catalytic specificity of manganese lipoxygenases : 3D structure analysis of the lipoxygenase of Magnaporthe oryzae

    Author : Anneli Wennman; Ernst H. Oliw; Marcia Newcomer; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; oxylipin; lipoxygenase; crystal structure; crystallography; HPLC; mass spectrometry; yeast; site-directed mutagenesis; fungi; Biochemical Pharmacology; Biokemisk farmakologi;

    Abstract : Lipoxygenases (LOX) catalyze regio- and stereospecific oxygenation of polyunsaturated fatty acids to hydroperoxides. These hydroperoxides are further metabolized to leukotrienes and lipoxins in mammals, and are involved in asthma and inflammation. LOX of animals and plants contain iron as catalytic metal (FeLOX). READ MORE

  6. 4. Outer Coordination Spheres Engineering of Ru-based Molecular Water Oxidation Catalysts

    Author : Tianqi Liu; Licheng Sun; Julio Lloret-Fillol; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; solar fuels; water oxidation; catalysis; ruthenium complex; Ru-bda; Ru-pda; outer coordination sphere; hydrophobic interactions; Kemi; Chemistry;

    Abstract : The outer coordination sphere plays a vital role in metalloenzyme catalysis, while this principle is relatively less considered in the design of man-made molecular catalysts. This thesis investigates the role of outer coordination spheres in water oxidation by a series of ruthenium-based complexes. READ MORE

  7. 5. Metals in Dynamic Chemistry: Selection & Catalysis

    Author : Brian J.J. Timmer; Olof Ramström; Stéphane Bellemin-Laponnaz; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; constitutional dynamic chemistry; selection; multivalent interactions; carbohydrates; quartz crystal microbalance; catalyst screening; aqueous olefin metathesis; C-H activation; Kemi; Chemistry;

    Abstract : In the adaptation to the oxidative environment on earth, metals played a crucial role for the evolution of life. The presence of metals also allowed access to advanced functions due to their unique coordination sphere and reactivity. READ MORE