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Chapter
Reactive Oxygen Species and Apoptosis
There is increasing evidence for the involvement of reactive oxygen species (ROS) in the regulation of central biological functions. Interaction between certain ROS and the generation of highly reactive ROS at...
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Article
TEM Observations on the Evolution of Grain Structure in Pressurized Al-0.5Cu Thin Films
This paper reports the observations of the grain-refining mechanism found in Al-0.5Cu thin films that are subjected to hydrostatic compressive pressure during the annealing process. The films are deposited on ...
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Chapter and Conference Paper
Freie Sauerstoffradikale: Biologische Grundlagen und Nachweismethoden
Die mit chemischen und strahlenchemischen Methoden in vitro erarbeiteten Kenntnisse über Radikalreaktionen sind nur mit großen Einschränkungen auf die Verhältnisse in vivo übertragbar. Gesetzmäßigkeiten der ch...
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Article
Optical Properties of Metal Films and Their Silicides
Silicides are used widely in microelectronic fabrication, yet there are very little data available regarding their optical constants at most wavelengths, and specifically at those of interest to G-line and I-l...
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Chapter and Conference Paper
Structural Principles of Flavonoid Antioxidants
Flavonoids are the most ubiquitous and structurally evolved class of plant phenolic compounds. Based on a few principal structures (see Fig. 1), multitudinous hydroxylation, methoxylation, and glycosylation pa...
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Chapter
Screening for Plant Antioxidants
Chloroplasts of green plants produce oxygen by light-driven reactions and contain photodynamically active molecules which catalyze photo-oxidations. The latter processes and unavoidable leakage of electrons, r...
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Article
Direct and indirect measurements of oxygen radicals
Instead of covering the available detection methods in detail it is attempted to highlight the ambiguities inherent in oxygen radical detection under in vivo conditions. Due to physicochemical properties of th...
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Article
Radical reactions in vivo - an overview
Generation of radicals in vivo depends on metabolic activities. The reactions are usually influenced by(i) the presence and concentration of oxygen;(ii) the availability of transition metals (effects of binding a...
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Article
Computational and experimental modeling of stretch forming operations
The paper reports selected results from a study of the stretch forming process. Sheet materials with a wide range of mechanical properties have been tested, including a carbon steel, 70/30 brass, 18/8 stainles...
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Chapter and Conference Paper
Numerical Integration of Finite Deformation Elastoplasticity with Application to Sheet-Forming
Finite element algorithms for large elastic-plastic deformation are predominantly based on explicit integration of the constitutive relations on tangent stiffness form. The final stress must be corrected back ...
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Article
Determination of sulfite radical (SO 3 ⋅ −) reaction rate constants by means of competition kinetics
The sulfite radical anion (SO 3 ⋅ −) was found to react rapidly with the flavonoid quercetin (k = 2.5 × 108 dm3mol−1 s−1) and the carotenoids crocin (k = 1.0 ×...
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Chapter and Conference Paper
Bildung und Aktivitäten biologisch relevanter Sauerstoffspezies
Als Einführung sollen die physikalisch-chemischen Aspekte der Sauerstoffaktivierung kurz umrissen und einige Reaktionsprinzipien aktivierter Sauerstoffspezies dargestellt werden.
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Article
Das Größenspektrum des natürlichen atmosphärischen Aerosols
The size distribution of natural occuring aerosol particles with a radius between 10−5 and 10−6cm was measured simultaneously by two different methods: Firstly the measurement of the current, caused by the natura...
