Search for dissertations about: "cylindrical structure"

Showing result 21 - 25 of 63 swedish dissertations containing the words cylindrical structure.

  2. 21. Twist-Symmetric Periodic Structures : Properties and Applications

    Author : Oskar Zetterström; Oscar Quevedo-Teruel; Martin Norgren; Nelson Fonseca; Jorge Ruiz-Cruz; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Abstract : In this thesis, periodic structures with higher symmetries symmetries are discussed. The main focus of the thesis is on twist symmetries. Importantly, the attractive properties of twist symmetries for the control of electromagnetic wave propagation are demonstrated. READ MORE

  4. 22. Electromagnetic Simulation, Analysis and Design with Application to Antennas and Radar Absorbers

    Author : Alireza Motevasselian; Lars Jonsson; Lars Pettersson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The present thesis considers two different subjects in the research area of electromagnetics. The first part is concerned with antenna design and the second with radar absorbers and rasorber.In the first part, a novel excitation technique for cylindrical dielectric resonator antennas is introduced to produce circular polarization. READ MORE

  5. 23. Formation mechanism of anionic-surfactant-templated mesoporous silica (AMS)

    Author : Chuanbo Gao; Osamu Terasaki; Anders Palmqvist; Stockholms universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mesoporous silica; anionic surfactant; formation mechanism; structural control; Chemistry; Kemi; Structural Chemistry; strukturkemi;

    Abstract : This dissertation is focused on synthesis, characterization and formation mechanism of anionic-surfactant-templated mesoporous silica (AMS). Structural control mechanisms of AMS are investigated. READ MORE

  6. 24. Glypican-1: Structural and functional analysis of the N-glycosylated human protein

    Author : Wael Awad Abdelhady; Biokemi och Strukturbiologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Proteoglycans; glypicans; glypican-1; heparan sulphate; N-glycosylation; exostosin-proteins; X-ray crystallography; crystal dehydration; diffraction anisotropy; Small angle X-ray scattering SAXS9; protein spectroscopy;

    Abstract : Glypicans are multifunctional cell surface heparan sulphate proteoglycans co-regulating numerous signalling pathways, and are thereby involved in the control of cellular division, differentiation, and morphogenesis. The heparan sulphate (HS) chains are responsible for many of those biological functions; nevertheless recent studies suggest functional roles for the glypican core proteins in mediating the signalling of various growth factors. READ MORE

  7. 25. Equilibrium and Kinetic Studies of the Binding of DNA to Cationic Liposomes

    Author : Paula Barreleiro; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Small-Angle Neutron Scattering; Fluorescence; Kinetics; Stopped-Flow; Differential Scanning Calorimetry; Titration Calorimetry; Gel-to-Liquid Crystalline Phase Transition; Lamellar phase; Lipolexes; DNA; Liposomes; Cryo-TEM; Physical chemistry; Fysikalisk kemi;

    Abstract : The objective of this work was to study the formation of DNA-cationic vesicle complexes (lipoplexes). These complexes are interesting not only from a fundamental point of view but also as promising candidates for gene therapy. The approach taken was to study first the cationic vesicles by themselves. READ MORE