Sökning: "ferrous iron"

Visar resultat 26 - 30 av 52 avhandlingar innehållade orden ferrous iron.

1. 26. Mechanisms of formation and protection against oxidative DNA damage in vitro and in vivo

   Författare :Peter Svoboda; Ralf Morgenstern; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical Biology; fysikalisk biologi;

   Sammanfattning : Oxidative DNA damage has been linked to cancer and aging as well as other diseases. The aim of this thesis was to study the mechanisms for DNA damage generated in cells or in vitro systems by ionizing radiation or transition metals like iron ions. LÄS MER

3. 27. Hydrogen diffusion and storage mechanisms in diopside

   Författare :Rickard Sundvall; Henrik Skogby; Alasdair Skelton; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mineralogy; Mineralvetenskap; mineralogi; petrologi och geokemi; Mineralogy; Petrology and Geochemistry;

   Sammanfattning : Hydrogen is a widespread trace element in many nominally anhydrous minerals (minerals without water or hydroxyl ions in their structural formula) from the Earth's crust and mantle. The hydrogen is normally incorporated in the form of hydroxyl ions and can be regarded as structurally bound water. LÄS MER

4. 28. Electronic structure investigations of transition metal complexes through X-ray spectroscopy

   Författare :Meiyuan Guo; Marcus Lundberg; Hélène Bolvin; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; transition metal complexes; x-ray spectroscopy; electronic structures; Kemi; Chemistry;

   Sammanfattning : Catalysts based on the first-row (3d) transition metals are commonly seen in chemical and biological reactions. To understand the role of the transition metal in the catalyst, the element specific technique core level spectroscopy is used to probe the electronic structure and geometric properties centered around the metal site. LÄS MER

5. 29. Adsorption and surface reaction properties of synthesized magnetite nano-particles

   Författare :Payman Roonasi; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry of Interfaces; Gränsytors kemi;

   Sammanfattning : The surface chemistry of inorganic materials is of great significance in a number of industrially important processes such as separation of ore by flotation, catalysis, water purification, paper coating and pharmaceutical industry. The purpose of this study has been firsly to develop a method for optimal synthesis of magnetite nanoparticles and secondly to utilize these particles as adsorbent in order to investigate their adsorption/desorption properties. LÄS MER

7. 30. Function and Adaptation of Acidophiles in Natural and Applied Communities

   Författare :Stephan Christel; Mark Dopson; Michael Schlömann; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Acidophiles; Biomining; Psychrophiles; Adaptation; Acid Sulfate Soil; Redox Control; Ecology; Ekologi;

   Sammanfattning : Acidophiles are organisms that have evolved to grow optimally at high concentrations of protons. Members of this group are found in all three domains of life, although most of them belong to the Archaea and Bacteria. LÄS MER