Sökning: "x-ray screens"
Hittade 5 avhandlingar innehållade orden x-ray screens.
1. A study of some energy dependent characteristics of X-ray screens used in diagnostic radiology : screen-film sensitivity, MTF and some related factors
Sammanfattning : Fluorescent x-ray screens are used in medical x-ray diagnostics to absorb x-ray photons and convert these x-ray photons to visible light. The light distribution from these screens are then registered on photographic film to give an x-ray image. LÄS MER
2. Electrochemically etched pore arrays in silicon for X-ray imaging detectors
Sammanfattning : Digital devices have now been introduced in many X-ray imaging applications, replacing slowly traditional photographic films. These devices are preferred as they offer real time imaging, easy handling and fast treatment of the images. LÄS MER
3. Structural studies of drug targets and a drug metabolizing enzyme
Sammanfattning : The work presented in this thesis describes how structural information about a protein can be acquired, and how it can be used to answer scientific questions about proteins’ function, their dynamic behaviour and their interactions with other proteins or ligands.The catalytic function of the pyrimidine-degrading, drug metabolizing enzyme β-ureidopropionase (βUP) is dependent on the shift between oligomeric states. LÄS MER
4. Structure and Function of HAMLET: Epitopes, Membrane Interactions and Molecular Recognition
Sammanfattning : HAMLET (Human Alpha-lactalbumin Made LEthal to Tumor cells) is a complex of partially unfolded human alpha-lactalbumin and oleic acid that kills many different types of tumor cells and shows therapeutic efficacy in animal models and clinical studies. This thesis aims to (1) elucidate the structure of HAMLET and the exposure of biologically active domains, (2) define the contribution of lipids to the tumoricidal effect of HAMLET, (3) characterize the membranes response to HAMLET and the perturbation of membrane associated signaling cascades, (4) use proteomic screens to identify conserved features of HAMLET targets in tumor cells. LÄS MER
5. Optical Properties of Single Silicon Quantum Dots
Sammanfattning : For over 60 years silicon (Si) has dominated the semiconductor microelectronics industry mainly due to its abundance and good electrical and material properties. The advanced processing technology of Si has made it the workhorse for photovoltaics industry as well. LÄS MER