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Visar resultat 1 - 5 av 64 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Corrosion-induced release of zinc and copper in marine environments

   Författare :Jan Sandberg; Inger Odnevall Wallinder; Dan Persason; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; copper; zinc; marine environment; runoff rate; atmospheric corrosion; chloride deposition; anti-fouling paints; chemical speciation; bioavailability; cupric ions; Other materials science; Övrig teknisk materialvetenskap;

   Sammanfattning : This licentiate study was initiated by copper, zinc and galvanized steel producers in Europe, who felt a need to assess runoff rates of copper and zinc from the pure metals and commercial products at marine exposure conditions. Their motive was the increasing concern in various European countries and the on-going risk assessments of copper and zinc within the European commission. LÄS MER

3. 2. Zinc-enriched neurons in the spinal cord, cerebellum and peripheral sympathetic system

   Författare :Zhan-You Wang; Göteborgs universitet; []
   Nyckelord :autometallography; axonal transport; confocal laser scanning microscopy; immuno-electron microscopy; immunofluorescence; inhibitory neurons; sympathetic neurons; synaptic vesicles; zinc ions; zinc transporter;

   Sammanfattning : Zinc ions are abundant in the nervous system and are involved in many biological functions. Most zinc is tightly bound to macromolecules, whereas a small fraction of zinc exists in synaptic vesicles of the zinc-enriched (ZEN) neurons, and can be visualized using various histochemical techniques, including autometallography (AMG). LÄS MER

4. 3. Quantum Chemical Modeling of Binuclear Zinc Enzymes

   Författare :Shilu Chen; Fahmi Himo; Luca De Gioia; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quantum Chemical Modeling; Binuclear; Zinc; Enzyme; DFT; Mechanism; Theoretical chemistry; Teoretisk kemi;

   Sammanfattning : In the present thesis, the reaction mechanisms of several di-zinc hydrolases have been explored using quantum chemical modeling of the enzyme active sites. The studied enzymes are phosphotriesterase (PTE), aminopeptidase from Aeromonas proteolytica (AAP), glyoxalase II (GlxII), and alkaline phosphatase (AP). LÄS MER

5. 4. Micro-galvanic effects and corrosion inhibition of copper-zinc alloys

   Författare :Mattias Forslund; Jinshan Pan; Christofer Leygraf; Per Claesson; Jin Ying; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Copper; zinc; brass; octadecanethiol; IR Spectroscopy; AFM; atmospheric corrosion; aqueous corrosion; corrosion inhibition; Koppar; zink; mässing; oktadekantiol; IR-reflektions absorptionsspektroskopi; AFM; atmosfärisk korrosion; vattenaktig korrosion; korrosionsinhibering.; Chemical Engineering; Kemiteknik; Kemi; Chemistry;

   Sammanfattning :    With the advancement and accessibility of local probing techniques that can operate at the submicron scale it has become possible to analyse the local corrosion properties of industrially important metallic materials and relate these properties to microstructure characteristics of the same materials. In this doctoral study the focus has been on copper-zinc samples, both as industrial brass alloys and as micro-patterned copper-zinc samples. LÄS MER

7. 5. Biochemical Studies of Semenogelins with Emphasis on Zinc-Binding Properties

   Författare :Magnus Jonsson; Malmö Klinisk kemi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; sexualitet; sexuality; Obstetrik; gynekologi; andrologi; reproduction; andrology; gynaecology; Obstetrics; Klinisk kemi; Clinical chemistry; gel-forming proteins; surface plasmon resonance; prostate-specific antigen; protein C inhibitor; seminal plasma; zinc; semen; semenogelin; reproduktion;

   Sammanfattning : Semenogelins I and II (SgI and SgII) are homologous and rapidly evolving proteins that have a repetitive primary structure and are synthesized mainly in the seminal vesicles. Upon ejaculation, a gelatinous coagulum is formed when the semenogelin-rich secretion from the seminal vesicles is mixed with the prostate secretion, which contains high concentrations of zinc(II) and proteases. LÄS MER