Sökning: "substitution effect"

Visar resultat 21 - 25 av 209 avhandlingar innehållade orden substitution effect.

1. 21. Theoretical calculations of heavy atom effects in magnetic resonance spectroscopy

   Författare :Corneliu I. Oprea; Hans Ågren; Patrik Norman; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nuclear spin-spin coupling tensor; nuclear shielding tensor; heavy atom effect; hyperfine coupling tensor; restricted-unrestricted approach; Theoretical chemistry; Teoretisk kemi;

   Sammanfattning : This thesis presents quantum chemical calculations, applications of the response function formalism recently implemented within the framework of density functional theory (DFT) by our research group. The purpose of the calculations is to assess the performance of this perturbative approach to determining heavy atom effects on magnetic resonance parameters. LÄS MER

3. 22. Understanding Ionic Conductivity in Crystalline Polymer Electrolytes

   Författare :Daniel Brandell; Josh Thomas; Torbjörn Gustafsson; Peter G. Bruce; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Polymer electrolyte; molecular dynamics; conductivity mechanism; aliovalent anion substitution; smectic; nematic; polymer chain length; Kemi; Chemistry; Kemi;

   Sammanfattning : Polymer electrolytes are widely used as ion transport media in vital applications such as energy storage devices and electrochemical displays. To further develop these materials, it is important to understand their ionic conductivity mechanisms. LÄS MER

4. 23. Advanced Gasification of Biomass/Waste for Substitution of Fossil Fuels in Steel Industry Heat Treatment Furnaces

   Författare :Duleeka Gunarathne; Weihong Yang; Wlodzimierz Blasiak; Tobias Richards; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass; Pretreatment; Gasification; Pressure drop; Steel industry; Fuel switch; Energy efficiency; Teknisk materialvetenskap; Materials Science and Engineering;

   Sammanfattning : With the current trend of CO2 mitigation in process industries, the primary goal of this thesis is to promote biomass as an energy and reduction agent source to substitute fossil sources in the steel industry. The criteria for this substitution are that the steel process retains the same function and the integrated energy efficiency is as high as possible. LÄS MER

5. 24. New approaches for treatment of acute intermittent porphyria by enzyme substitution and gene therapy : evaluation in vitro and in vivo

   Författare :Annika Johansson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Acute intermittent porphyria; adenovirus; 5-aminolevulinic acid; enzyme substitution; gene therapy; non-viral gene delivery; porphobilinogen; porphobilinogen deaminase; protoporphyrin;

   Sammanfattning : Acute intermittent porphyria (AIP) is a rare inborn metabolic error of heme synthesis in which the activity of the third enzyme, porphobilinogen deaminase (PBGD), is deficient. It is clinically characterized by acute, potentially life-threatening neurologic attacks that are precipitated by various drugs, reproductive hormones and other factors. LÄS MER

7. 25. Expression, regulation and functional aspects of the NPY Y1 receptors in rat

   Författare :Jutta Maria Kopp; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :G-protein coupled receptor; mapping; in situ hybridization; immunohistochernistry; pre- synaptic receptor; nerve injury; tracing; epilepsy; neuroprotective effect; electroconvulsive stimulation; ovary; fertility; pituitary gland.;

   Sammanfattning : The distribution of the NPY receptor subtypes, mainly of Y1 and Y2 receptors, has been studied extensively by others employing pharmacological ligand binding techniques. The major aim of this thesis was to study in detail the distribution of Y1-receptors (Y1Rs) in rat and mouse with antisera against the C-terminus (CT) of the rat Y1R using an immunohistochemical technique with enhanced sensitivity (tyramide signal amplification = TSA). LÄS MER