Materials Literature
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Twenty-three of 86 strains of lactic acid bacteria transformed linoleic acid into hydroxy FA. Two distinct conversion pathways were in operation. Two strains of Lactobacillus acidophilus and a strain of Pediococcus pentosaceus produced 13(S)-hydroxy-9-octadecenoic acid 113(S)-OH 18:11 and 10,13dihydroxyoctadecanoic ac…
Article Quantum Chemical Parameters of Some Organic Corrosion Inhibitors, Pyridine, 2-Picoline 4-Picoline and 2,4-Lutidine, Adsorption at Aluminum Surface in Hydrocholoric and Nitric Acids and Comparison Between Two Acidic Media. was published on December 1, 2003 in the journal Main Group Metal Chemistry (volume 26, i…
A pH-responsive polymer Eudragit S-100 has been found to assist in correct folding of alpha-chymotrypsin denatured with 8 M urea and 100 mM dithiothreitol at pH 8.2. The complete activity could be regained within 10 min during refolding. Both native and refolded enzymes showed emission of intrinsic fluorescence with l…
Abstract The Şile Region contains discontinuous, cyclic, thin coal beds and industrial clay deposits that were accumulated in lacustrine basins which received extensive volcanoclastic sediments due to transport of highly weathered calc-alkaline volcanic rocks. The Sülüklü area has the largest kaolin deposit in this re…
Magnesium - 8.5 wt-% lithium and AZ91 alloys, processed using rotary die equal channel angular pressing, exhibit superplasticity. Deformed specimens have been used to investigate the movement of alloying elements during superplastic deformation. Optical microscopy and electron probe microanalysis were used for the inv…
Sodium montmorillonite clay consists of platelets, one nanometer thick with large lateral dimensions, which can be used to achieve efficient reinforcement of polymer matrices. Formation of these nanocomposites requires modifying the clay with an appropriate organic surface treatment and optimized processing. Some of t…
Abstract Hot dipping of steel in aluminium–zinc baths of varying composition (5–90% Al) has been undertaken with the aim of elucidating the mechanism of coating formation. On the basis of these experiments, it has been possible to define a range of aluminium content over which there is a change from a normal galvanizi…
Abstract This paper is in four parts. The first is related to general considerations and experimental analyses, and each of the others is related to different approaches to the theoretical analyses of the mechanical behaviour of weft-knitted fabrics and weft-knitted reinforced composites made of glass fibre. The objec…
Nous avons affine la structure cristalline de l'uzonite provenant de la localite type, la caldeira de Uzon, au Kamchatka, en Russie, dans le groupe spatial P2 1 /m jusqu'a un residu R de 2.66%. Les parametres reticulaires sont: a 7.973(2), b 8.096(2), c 7.148(2) A, β 101.01(2)°, V 452.9(2) A 3 , Z = 2. Le modele struc…
Nanomaterials and, in particular, nanoparticles are at the forefront of the nanotechnology wave.Over recent years there has been a rapid increase in the range of available nanomaterials and the number of companies that supply them.A variety of production techniques is used, each with benefits and drawbacks, but these…
Abstract To resolve various problems in creating a process, or conducting stability analysis, and/or hazard assessments, one needs t o know the reactivity of a chemical system. The National Fire Protection Association (NFPA) requires use of a reactivity rating number to describe such reactivity potentials as thermal s…
The isothermal oxidation behavior of Ti3AlC2 based material containing 5 vol% TiC inclusion in air had been investigated at 500–900 °C by means of TGA, XRD, Raman spectroscopy and SEM/EDS. It was demonstrated that, although Ti3AlC2 based material exhibited good oxidation resistance at temperatures above 700 °C, anomal…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSelective Convergent Synthesis of Aliphatic Polyurethane DendrimersW. James Feast, Steve P. Rannard, and Alison StoddartView Author Information Unilever Research and Development Port Sunlight, Quarry Road East, Bebington, Wirral CH6…
The effect of nitrate on the general corrosion and pitting corrosion of iron was investigated in sulfate-based solutions with different pH values. Nitrate greatly accelerates the general corrosion of iron in acidic solutions, but has slight influence on the general corrosion in neutral solutions. The pitting inhibitio…
Abstract Di(isononyl) cyclohexane‐1,2‐dicarboxylate (HEXAMOLL® DINCH) is a new plasticizer for PVC. In the tests used, it has no indication of toxicity or genotoxicity; it is biodegradable; and it has low sensitizing properties. Its properties in PVC compare favorably to those of other plasticizers having well‐balance…
Abstract The kinetics of hyperbranched A 2 + B 3 systems is discussed theoretically with respect to the development of the 7 different structural units, the degree of branching, DB , and the monomer sequences considering the adjacent groups of a structural unit. For A 2 + B 3 systems, the comonomer ratio, the relative…
The Abraham general solvation model is used to correlate the solubility behavior of 3-methylbenzoic acid and 4-chlorobenzoic acid in alcohol and ether solvents. The mathematical correlations take the form of [Formula: see text] [Formula: see text] where C S and C W refer to the solute solubility in the organic solvent…
The structure-acidity relationship in the series of non-substituted, meso- or β-substituted and β,β-annulated porphyrins and porpyrazines have been studied using the AM1 method with unrestricted Hartree-Fock basis set. With this purpose, heats of formation have been determined for the geometry optimized structures of…
Abstract Surface selective oxides created during continuous annealing (MnO, SiO 2 , etc.) can have a deleterious effect on coating adhesion after hot‐dip galvanizing. Earlier research works have made it clear that increasing the annealing atmosphere oxidizing potential can alleviate the problem by reducing external su…
Copolymers of octanediol adipate and sorbitol adipate, P(OA-SA), copolymers of octanediol adipate and glycerol adipate, P(OA-GA), poly(octamethylene adipate), POA, and poly(sorbitol adipate), PSorA, were synthesized using immobilized Lipase B from Candida antarctica (Novozyme-435) as catalyst. The molecular weights an…