Search for dissertations about: "NMR"

Showing result 1 - 5 of 673 swedish dissertations containing the word NMR.

  1. 1. Nuclear Magnetic Relaxation in Micellar Solution and Lyotropic Liquid Crystals. Tools and Applications

    University dissertation from Stockholm : Kemi

    Author : Ruslan Sitnikov; KTH.; [2000]
    Keywords : NMR; NMR relaxation dispersion; NMR spectrometer; low NMR frequencies; NMR duplexer; NMR preamplifier; NMR lock; surfactant systems; micellar solutions; lyotropic liquid crystals; cubic mesophase;

    Abstract : Structurally, this Thesis is divided into two parts thatdescribe (i) the hardware development for NMR relaxationstudies and (ii) its applications for studies of the surfactantsystems.The developed hardware solutions allow to expand thefrequency range covered by conventional NMR spectrometers tomake NMR experiments feasible at resonance frequencies down to100 kHz. READ MORE

  2. 2. Characterizing Chromatography Media NMR-based Approaches

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Fredrik Elwinger; KTH.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; chromatography; nuclear magnetic resonance; NMR; self-diffusion; magic-angle spinning; quantitative; distribution coefficient; pore size; Kemi; Chemistry;

    Abstract : Liquid chromatography is an essential technique in manufacturing biopharmaceuticals where it is used on all scales from analytical applications in R&D to full-scale production. In chromatography the target molecule, typically a protein, is separated and purified from other components and contaminants. READ MORE

  3. 3. NMR Studies of Colloidal Systems in and out of Equilibrium

    University dissertation from Stockholm : KTH

    Author : Pavel V. Yushmanov; KTH.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; stopped-flow NMR; temperature-jump NMR; crossrelaxation; NMR; NMR probe; fluorosurfactant; micellar kinetics; micellar structure; NATURAL SCIENCES Chemistry Physical chemistry; NATURVETENSKAP Kemi Fysikalisk kemi;

    Abstract : The Thesis describes (i) the development of add-on instrumentation extending the capabilities of conventional NMR spectrometers and (ii) the application of the designed equipments and techniques for investigating various colloidal systems. The new equipments are:Novel designs of stopped-flow and temperature–jump inserts intended for conventional Bruker wide-bore superconductive magnets. READ MORE

  4. 4. NMR Diffusometry and Dynamic NMR Microscopy Studies of Colloidal Systems

    University dissertation from Chalmers University of Technology

    Author : Helena Wassenius; Chalmers tekniska högskola.; Chalmers University of Technology.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; NMR diffusometry; dynamic NMR microscopy; colloidal systems; diffusion behaviour; core-shell latex particles; NMR velocimetry; rheology;

    Abstract : In this thesis, the NMR diffusometry and dynamic NMR microscopy methods were shown to be useful techniques with a great potential for the study of colloidal systems. In Paper I-II, NMR diffusometry was used to study the behaviour of surfactant and polymer molecules that are normally important components in colloidal dispersions and emulsions. READ MORE

  5. 5. Physico-Chemical Properties of Plant Polysaccharides Investigated with NMR Techniques

    University dissertation from Chalmers University of Technology

    Author : Åsa Östlund; Chalmers tekniska högskola.; Chalmers University of Technology.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Spektroskopi; Spectroscopy; Yt- och kolloidkemi; Surface and colloid chemistry; Cellulose solution; Chemical shift imaging; Cryoporometry; Dissolution of cellulose; Fiber hornification; 19F NMR; Gelation of cellulose; 1H NMR; Molecular weight; NMR diffusometry; Pore size distribution; Pulsed field gradient NMR; Self-diffusion; TBAF DMSO; Xylan;

    Abstract : In the lead of developing new biomaterials from plant sources it is of importance to be able to control and vary the properties, such as flexibility, strength, and hygroscopicity of the final material. These properties are highly directed by the interactions between constituents on a molecular level. READ MORE