Sökning: "platinum"

Visar resultat 1 - 5 av 195 avhandlingar innehållade ordet platinum.

  1. 1. Adsorption and bonding on platinum influence of the surface structure and chemical composition

    Detta är en avhandling från Stockholm : Fysik

    Författare :Emmanuelle Janin; KTH.; [2000]
    Nyckelord :Platinum; tin; low index single crystal surfaces; adsorption;

    Sammanfattning : This thesis deals with the influence of the structure andchemical composition of platinum surfaces on the adsorption ofsome molecules. Three main lines can be distinguished : 1) thecharacterisation of clean/modified surfaces, 2) the adsorptionof some simple atoms and molecules on these surfaces andfinally 3) the adsorption of 2-butenal, a bi-functionalmolecule containing a C=C group conjugated with a C=O group. LÄS MER

  2. 2. Platinum Group Elements in Birds of Prey

    Detta är en avhandling från Stockholm : Fysik

    Författare :Kristine H. Ek; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rhodium; bird of prey; platinum; laser ablation; palladium; ICP-MS; airborne particles;

    Sammanfattning : The environmental concentrations of Pd, Pt and Rh (three of the platinum group elements, PGE) have increased since the introduction of exhaust catalysts on automobiles. A limited understanding of the environmental distribution and effects of the platinum group elements has raised concern over their potential biological availability. LÄS MER

  3. 3. In situ Studies of Platinum Catalyst Sintering

    Detta är en avhandling från Stockholm : Fysik

    Författare :Pooya Tabib Zadeh Adibi; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanoparticle sintering; indirect nanoplasmonic sensing; operando spectroscopy; transmission electron microscopy; platinum; catalyst deactivation; sintering kinetics;

    Sammanfattning : The damaging effect of pollutants from combustion engine exhaust on human health and environment is well recognized. Since the 70s, the three-way catalytic converter (TWC) has substantially improved the urban air quality by simultaneous conversion of CO, NOx and unburned hydrocarbons to O2, N2 and H2O. LÄS MER

  4. 4. Copper-transporting proteins and their interactions with platinum-based anticancer substances

    Detta är en avhandling från Umeå : Umeå Universitet

    Författare :Maria Espling; Umeå universitet.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cisplatin; Atox1; copper transport; anticancer drug; resistance; platinum; spectroscopy.; biologisk kemi; biological chemistry;

    Sammanfattning :   Cisplatin (CisPt) is an important drug that is used against various cancers, including testicular, ovarian, lung, head, and neck cancer. However, its effects are limited by cellular resistance. LÄS MER

  5. 5. Low-Temperature Oxidation of CO and Volatile Organic Compounds over Supported Platinum Catalysts

    Detta är en avhandling från Umeå : Umeå Universitet

    Författare :Karl Arnby; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hexamethyldisiloxane; alumina; catalytic deactivation; environmental catalysis; platinum; volatile organic compounds; carbon monoxide; low-temperature activity;

    Sammanfattning : The catalytic oxidation of carbon monoxide (CO) and volatile organic compounds (VOC) is important for the reduction of harmful emissions from both vehicles and from stationary sources. Both these applications suffer from poor catalytic efficiency at lower temperatures. LÄS MER