Sökning: "Chemistry"

Visar resultat 1 - 5 av 2982 avhandlingar innehållade ordet Chemistry.

1. 1. Investigations of Solvent Systems Based on bis-triazine-bipyridine (BTBP) - class Ligands for the Separation of Actinides from Lanthanides

   Detta är en avhandling från Chalmers University of Technology

   Författare :Teodora Retegan; Chalmers tekniska högskola.; Chalmers University of Technology.; [2009]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; BTBP; solvent extraction; actinides; lanthanides; diluents; complexes; side groups;

   Sammanfattning : Shortages of fossil fuel and other political movements contributed to the nuclear energy “renaissance”. Nuclear energy, however, is not free of challenges, one of them being nuclear waste management. LÄS MER

3. 2. Dynamic Sulfur Chemistry : Screening, Evaluation and Catalysis

   Detta är en avhandling från Stockholm : KTH

   Författare :Rémi Caraballo; KTH.; [2010]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Dynamic combinatorial chemistry; dynamic sulfur chemistry; thioglycoside; mutarotation; disulfide metathesis; hemithioacetal formation; 1H STD-NMR; inhibition; phosphine; Concanavalin A; beta-galactosidase; dynamic drug discovery.;

   Sammanfattning : This thesis deals with the design, formation and evaluation of dynamic systems constructed by means of sulfur-containing reversible reactions, in organic and aqueous media and under mild conditions.In a first part, the synthesis of thioglycoside derivatives, constituting the biologically relevant starting components of the dynamic systems, is described. LÄS MER

4. 3. 5-Aminolevulinic acid and derivatives thereof : Properties, lipid permeability and enzymatic reactions

   Detta är en avhandling från Örebro : Örebro University (www.publications.oru.se)

   Författare :Edvin Erdtman; Örebro universitet.; [2010]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 5-Aminolevulinic acid; tautomerization; PDT; DFT; MM; QM MM; Porphobilinogen synthase; Uroporphyrinogen III decarboxylase; membrane penetration; enzyme mechanism; Physical Chemistry; fysikalisk kemi; Biochemistry; biokemi;

   Sammanfattning : 5-aminolevulinic acid (5-ALA) and derivatives thereof are widely usedprodrugs in treatment of pre-malignant skin diseases of the cancer treatmentmethod photodynamic therapy (PDT). The target molecule in 5-ALAPDTis protoporphyrin IX (PpIX), which is synthesized endogenously from5-ALA via the heme pathway in the cell. LÄS MER

5. 4. Retinoids and Ruthenium Complexes: Spectroscopic Probes for Lipid Membranes

   Detta är en avhandling från Chalmers University of Technology

   Författare :Frida Svensson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; liposomes; membrane interaction; lipid vesicle; linear dichroism; orientation; lipid chain ordering; retinoic acid; ruthenium; dipyridophenazine;

   Sammanfattning : .... LÄS MER

7. 5. Triplet Excitation Energy Transfer in Donor-Bridge-Acceptor Systems: Experimental and Theoretical Investigations

   Detta är en avhandling från Chalmers University of Technology

   Författare :Mattias Eng; Chalmers tekniska högskola.; Chalmers University of Technology.; [2007]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; gold porphyrin; electron transfer; triplet excitation energy transfer; superexchange; electronic coupling; self-assembled monolayer; spectroscopy; density functional theory;

   Sammanfattning : This thesis is a contribution to the understanding of bridge mediation of electron exchange processes in Donor-Bridge-Acceptor (D-B-A) systems. The field of research is relevant for the development and optimization of dye-sensitized solar cells, artificial photosynthesis, and the possible future development of molecular electronic devices. LÄS MER