Search for dissertations about: "shape selectivity"

Showing result 1 - 5 of 29 swedish dissertations containing the words shape selectivity.

  2. 1. A Novel Rearrangement of Allyl Benzyl Ethers and Aspects on the Glyoxylate Ene Reaction

    Author : Johan Wennerberg; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; liverwort; natural product synthesis; phenyl butyraldehydes; allyl benzyl ethers; 2-hydride migration; 1; 4-rearrangement; regio selectivity; shape selectivity; zeolite; Ene reaction; Taxol A-ring; naphthalene derivatives; dihydronaphthalenes; Organic chemistry; Organisk kemi;

    Abstract : This thesis describes an improvement of the glyoxylate ene reaction by using siamyl glyoxaylate and a development of the novel rearrangement of allyl benzyl ethers. The glyoxylate ene reaction was used as a key reaction in a 8-step synthesis of a Taxol A-ring building block. READ MORE

  4. 2. Selectivity of dopamine D1 and D2 receptor agonists – A combined computational approach

    Author : Marcus Malo; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; dopamine; agonists; GPCRs; pharmacophore modeling; protein structure modeling; agonist selectivity;

    Abstract : Dopamine (DA) is an endogenous neurotransmitter acting in the central nervous system. DA plays a key role in many vital brain functions such as behavior, cognition, motor activity, learning, and reward. Dopamine receptors belong to the rhodopsin like family of G-protein coupled receptors (GPCRs). READ MORE

  5. 3. Alkylation and Hydrodearomatization over Zeolite cCatalysts

    Author : Jun-Jun Yuan; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acid catalysts; ZSM-5 catalysts; ethylbenzene; toluene; temperature; diesel fuel; hydrodearomatization; benzene; acidic protons; activity and selectivity; aqueous ethanol; Pt Y zeolite; gasoline; pressure; GC; diethylbenzene; Hydrocracking; SiO2 Al2O3 ratio; alkylation of aromatics; Brønsted acids;

    Abstract : The alkylation of aromatic compounds is widely used in the large-scale synthesis of petrochemicals, and a great variety of fine chemicals and intermediates. Acid catalysts used for alkylation of aromatic hydrocarbons are Brønsted acids containing acidic protons. READ MORE

  6. 4. Permeability of the glomerular filtration barrier in relation to the size, shape, charge and deformability of the permeating molecules

    Author : Daniel Asgeirsson; Njurmedicin; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; proteinuria; capillary physiology; peritoneal membrane; dialysis; microalbuminuria; cardiovascular; endothelial dysfunction; diagnosis;

    Abstract : Characterization of the glomerular filtration barrier is of fundamental importance for understanding the pathophysiology of proteinuric kidney diseases. Furthermore, it can be of key value in the understanding of microalbuminuria, which is often associated with endothelial dysfunction in conjunction with cardiovascular disease. READ MORE

  7. 5. Functional mapping of somatosensory cortices in the human brain

    Author : Anna S K Bodegård; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Sornatosensory areas; PET; cytoarchitectonic mapping; postcentral gyrus; shape perception; active touch; passive touch;

    Abstract : Tactile perception is a remarkable ability that enables us to recognise objects and handle tools. Cortical processing during tactile and shape perception in humans is not fully understood. READ MORE