Sökning: "amorphous ice"
Visar resultat 1 - 5 av 10 avhandlingar innehållade orden amorphous ice.
1. Pressure-Induced Amorphization and Distinct Amorphous States of Clathrate Hydrates
Sammanfattning : This thesis summarizes a study on the pressure-induced amorphization (PIA) and structures of amorphous states of clathrate hydrates (CHs).PIA involves the transition of a crystalline material into an amorphous solid in response of mechanical compression at temperatures well below the melting point. LÄS MER
2. Spectroscopic studies on phase transitions in amorphous ices
Sammanfattning : .... LÄS MER
3. Optical and x-ray studies of ice growth in water
Sammanfattning : The key purpose of this thesis is to study the structure of metastable water and its transformation into ice upon deep supercooling using x-ray scattering as well as optical microscopy. In all experiments, micrometer-sized water droplets were evaporatively cooled in vacuum and probed either by x-rays or optical illumination. LÄS MER
4. Investigation of the Freeze-Thawing Process for Pharmaceutical Formulations of a Model Protein
Sammanfattning : Recent advances in recombinant DNA technology have resulted in a great number of proteins with a potential to enter pharmaceutical formulations. The most commonly used method for preparing protein pharmaceuticals is by freeze-drying. LÄS MER
5. Simulation of Core-Level Spectra of H-bonded Systems
Sammanfattning : The thesis consists of three related projects where attempts have been made to simulate X-Ray Absorption (XAS) spectra of water and hexagonal ice, static non-resonant X-ray Emission (XES) spectrum of water and to apply the semi-classical approximation to Kramers-Heisenberg formula (SCKH) formalism to calculate the non-resonant XES spectrum of water and methanol. The first project is devoted to an investigation of the performance of damped response theory in combination with the DFT electronic structure method (CPP-DFT) in XAS spectrum simulations of liquid water. LÄS MER