Materials Literature
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Applicability of an ensemble of Elman networks with boosting to drug dissolution profile predictions is investigated. Modifications of AdaBoost that enables its use in regression tasks are explained. Two real data sets comprising in vitro dissolution profiles of matrix-controlled-release theophylline pellets are emplo…
In many service applications, excursions in solution chemistry, temporary loss of inhibitor, or transient increases in temperature may give rise to localized corrosion in an otherwise inhibited system. It is important to demonstrate that inhibition will be effective in retarding the rate of propagation of localized co…
Abstract A series of multiblock copolymers of PLLA/PEG(PLE) with high molecular weight were synthesized by coupling PLLA‐PEG‐PLLA triblock copolymers with succinic anhydride in the presence of N‐dimethylaminopyridine(DMAP) and dicyclohexylcarbodimide (DCC). The results of the viscometry measurement, GPC and 1 H NMR, e…
Mannitol dehydrogenase (MDH) was purified and characterised from Lactobacillus sanfranciscensis. Two peptide fragments of MDH were N-terminally sequenced for the first time in the genus Lactobacillus. The purified enzyme had an apparent molecular mass of 44 kDa and catalysed both the reduction of fructose to mannitol…
Author: Strecker, A. et al.; Genre: Journal Article; Issued: 2003; Keywords: MPI für Metallforschung; Abt. Rühle; ZWE Hochspannungs-Mikroskopie; ; Title: Progress in the preparation of cross-sectional TEM specimens by ion-beam thinning
Abstract Residual clays that developed on Permian and Carboniferous glass-rich silicic volcanic rocks (pitchstones, ignimbrites) at the Seilitz and Kemmlitz kaolin deposits, Saxony, Eastern Germany, contain locally abundant lath-shaped illite-rich illite-smectite mixed-layer minerals (I-S). Analyses by XRD and TEM-AES…
Abstract Aminophenols, methoxyanilines and 1‐naphthylamine were polymerized via the catalysis of horseradish peroxidase in dioxane at ambient conditions by using hydrogen peroxide as the oxidant. Polymers formed in good yields when using double the amount of the oxidant. The molecular weight of the polymers was determ…
The Ising-like model provides a microscopic approach and a unifying description of the thermodynamic properties associated with molecular switching in inorganic solids. Applications are given for the spontaneous thermal transitions, under applied pressure or external magnetic field.
Abstract The cobalt‐catalyzed alternating copolymerization reaction of racemic propylene oxide and CO affords regioregular but atactic poly(hydroxybutyrates). The application of enantiomerically pure ( R )‐ or ( S )‐propylene oxide results in the formation of isotactic, optically active and crystalline materials. In c…
Dy 3+ - and Tm3+-doped lanthanum chloride was prepared via reactive atmosphere processing (RAP) of sol-gel derived hydroxide powders. The low-phonon energy chloride host facilitated the 1.3-μm emission from Dy3+ and the 1.2- and 1.4-μm emissions from Tm3+. The emission intensities of the Dy3+ and Tm3+ ions increased l…
Abstract The structural evolution of quartz-type iron phosphate, FePO 4 , was studied by time-of-flight neutron powder diffraction from 294 K up to 1073 K. The refined structural parameters of the low-temperature α phase tend towards the values obtained for high-temperature β -quartz-type FePO 4 . In particular, the F…
The knowledge of the microstructural evolution during exposure to high temperatures is important to understanding the mechanisms responsible for the creep resistance of silicon carbide (SiC) ceramics. This includes not only the phase transformation of the SiC grains, but also the phase transformations of the oxynitrid…
We have measured x-ray absorption fine structure of pre- and post-ultraviolet(UV)-irradiated gold (Au) deposited- titania (TiO2) nanocomposites in order to study the effect of UV irradiation on the charge state and local structures around Au in TiO2. Our results indicate a positive oxidation state of Au in TiO2 follow…
Abstract In this work, an experimental comparison between five different techniques to measure interfacial tension between molten polymers is presented. The five techniques include two equilibrium methods: the pendant drop (PD) and the sessile drop (SD); two dynamic methods: the breaking thread (BT) and imbedded fiber…
By applying real-time spectroscopic ellipsometry and infrared attenuated total reflection spectroscopy (ATR), we have characterized interface-layer formation in microcrystalline silicon (μc-Si:H) growth on ZnO substrates in a conventional rf plasma-enhanced chemical vapor deposition. With an increase in the hydrogen d…
A double perovskite type compound Sr2FeMoO6 was synthesized by a solid-state reaction. The order parameter (x) of Fe and Pt ions on the B sites increased from 68% to 82% and the spontaneous magnetization at 5 K increased from 2.1 to 3.0 μB per formula unit by lowering the calcination temperature from 1100 to 500 °C. T…
ABSTRACT: The effect of film composition on potassium sorbate diffusion in whey protein films was studied using mixture response surface methodology. The model developed for potassium sorbate diffusivity was statistically significant ( P < 0.01) with no significant lack of fit. The diffusivities of potassium sorbat…
A gene encoding a 2-deoxy-d-ribose-5-phosphate aldolase (DERA) homolog was identified in the hyperthermophilic Archaea Aeropyrum pernix. The gene was overexpressed in Escherichia coli, and the produced enzyme was purified and characterized. The enzyme is an extremely thermostable DERA; its activity was not lost after…
This paper derives a mathematical model for the hysteresis characteristics of spin-ferromagnetic materials on a quantum-mechanical basis. For a given material, the model provides a link between the micromagnetic behavior at the atomic/domain levels and the details of the scalar hysteresis loop at the macroscopic level…
Abstract Probiotic bacteria, added to yoghurt to impart health benefits, require a low‐oxygen environment for maximum viability. The aim of this experiment was to produce yoghurt with minimal oxygen content using packaging systems. Three packaging systems were evaluated for the effect they exert on the dissolved oxyge…