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Activity and stability of soluble and immobilized alpha-glucosidase from baker's yeast in cosolvent systems
(Taylor & Francis Ltd, Abingdon, 2006)
The activity of alpha-glucosidase from baker's yeast was determined in various concentrations of dioxan, tetrahydrofuran, tert-butanol, dimethylformamide, methanol and dimethylsulfoxide (DMSO). Higher activities were ...
Topographical characterization and surface force spectroscopy of the photochemical lignin model compound
(Elsevier, Amsterdam, 2001)
By combining the results from atomic force microscopy (AFM) and environmental scanning electron microscopy (ESEM), herein we investigate properties of photochemical lignin model compounds. We provide evidence that photochemical ...
Self-assembly of Mo6S (8) clusters on the Au(111) surface
(Springer, New York, 2007)
The preferred adsorption sites and the propensity for a self-organised growth of the molybdenum sulfide cluster Mo6S8 on the Au(111) surface are investigated by density-functional band-structure calculations with ...
Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical
(Elsevier Sci Ltd, Oxford, 2009)
The hydroxyl radical ((OH)-O-center dot) has detrimental biological activity due to its very high reactivity. Our experiments were designed to determine the effects of equimolar concentrations of glucose, fructose and ...
Far infrared reflectance of sintered Zn2TiO4
(Springer, New York, 2008)
Zinc-titanate ceramics were obtained by initial mechanical activation in a high-energy planetary mill for 15 min followed by sintering at temperatures 900-1100 degrees C for 2 h. Room temperature far infrared reflectivity ...
Oxygen and light accelerate recovery from SO2-induced inhibition of leaf photosynthesis and from cytoplasmic acidification
(Elsevier GmbH, 2000)
Leaves of several plant species were illuminated either in air or in a gas atmosphere with reduced oxygen content, and photosynthesis and transpiration were recorded after brief exposure to high concentrations of SO2. ...
Structural and electrical properties of ZnO varistors containing different spinel phases
(Elsevier Sci Ltd, Oxford, 2001)
Structural and electrical properties of ZnO varistors were investigated as a function of spinel composition. Six varistor mixtures differing only in chemical composition of spinel, were prepared by mixing separately ...
Dielectric and piezoelectric properties of the mechanochemically prepared PZT ceramics
(Springer, New York, 2004)
Mechanochemical synthesis was applied to obtain nanocrystalline powders of composition Pb(Zr0.52Ti0.48)O-3 (PZT). Milling was performed in a planetary ball mill using vials and balls made of zirconia or steel-in order to ...
Far infrared reflectance of sintered nickel manganite samples for negative temperature coefficient thermistors
(Pergamon-Elsevier Science Ltd, Oxford, 2007)
Single phase complex spinel (Mn, Ni, Co, Fe)(3)O-4 samples were sintered at 1050, 1200 and 1300 degrees C for 30 min and at 1200 degrees C for 120 min. Morphological changes of the obtained samples with the siDtering ...
Senescence-related changes in catalase, peroxidase and ascorbic acid level in ginkgo and birch leaves during autumn yellowing
(Taylor & Francis Ltd, Abingdon, 2003)