Sökning: "UV protection"

Visar resultat 26 - 30 av 34 avhandlingar innehållade orden UV protection.

1. 26. Redox Reactions of Uranium-Based Materials in Aqueous Systems and Under UHV Conditions. : Two models mimicking radiation-induced oxidation of spent nuclear fuel

   Författare :Ghada El Jamal; Mats Jonsson; Christophe Jégou; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry;

   Sammanfattning : The demand for clean electricity is a primary concern in Europe. Nuclear power isconsidered as a greenhouse gas-free technology for generation of electricity. However,compared to other energy sources, it generates a highly toxic waste.In Sweden, the long-term solution for the waste disposal issue is called the KBS-3 method. LÄS MER

3. 27. Long-term performance of water repellants on rendered autoclaved aerated concrete

   Författare :Hülya Kus; KTH; []
   Nyckelord :water repellants; renderings; autoclaved aerated concrete; surface treatments; long-term performance; degradation; natural weathering; artificial weathering; moisture monitoring;

   Sammanfattning : Many failures of external walls made of porous buildingmaterials are caused by excessive moisture content,particularly after driving rain and under long duration ofmoist conditions. Lack of sufficient protection againstexposure conditions is one of the reasons for external wallsprematurely demonstrating failures, i.e. LÄS MER

4. 28. Reactions of Model and Anticancer Active Platinum(IV/II) Complexes - A Kinetic and Mechanistic Study

   Författare :Kelemu Lemma; Kemiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Model Pt II complexes; Anticancer active Pt IV compounds; Cisplatin; Rescue agents; L-Ascorbic acid; Thiol; Substitution; Kinetics and mechanism; Electron transfer; Inorganic chemistry; Oorganisk kemi;

   Sammanfattning : In this thesis reductions of model and anticancer active Pt(IV) complexes with thiols and ascorbic acid and substitution reactions of cisplatin and model Pt(II) complexes with S-donor nucleophiles (rescue agents) have been investigated using stopped-flow and UV/VIS spectrophotometry. Glutathione (GSH) reduction of the anticancer active Pt(IV) compounds t- and c-[PtCl4(cha)(NH3)] (cha = cyclohexylamine), t-[PtCl4(thiazole)(NH3)] and c-[PtCl4(NH3)2] at 25 oC was observed to be very fast. LÄS MER

5. 29. Chemical and electronic structure of interfaces in organic-based devices

   Författare :Annica Crispin; Henrik Stubb; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : This thesis deals with some of the main physical and chemical phenomena involving organic semiconductors in (opto )electronic devices: (i) the fabrication and characteristics of organic light emitting diodes (OLEDs), (ii) the chemistry occurring at metal-polymer and polymer-metal interfaces, (iii) the nature of electronic levels induced upon doping in molecular organic semiconductors.In the first paper, fluorine tin oxide (FTO) electrodes have been studied as an alternative to indium tin oxide (ITO) for hole-injection in polymer-based light emitting devices. LÄS MER

7. 30. Studies of fish responses to the antifoulant medetomidine

   Författare :Anna Lennquist; Göteborgs universitet; []
   Nyckelord :antifouling; fish; medetomidine; ecotoxicology; biomarker;

   Sammanfattning : ABSTRACT Growth of marine organisms, fouling, on man-made constructions submerged in the water is regarded as a major problem. For vessels, fouling increases drag and thereby fuel consumption, wherefore antifouling paints are used. Traditionally, they contain toxic compounds, and several of these have unwanted effects in the environment. LÄS MER