Materials Literature
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The reaction of an oxidised activated carbon with gaseous ammonia converts surface cyclic anhydride groups to amide and ammonium carboxylate species, which at elevated temperatures decompose to nitrile. Amine and alcohol species are also adsorbed products of ammonia treatment. Cyclic anhydride groups were hydrolysed b…
Abstract A study on biological assessment of water pollution using diatom community structure and species distribution was carried out in the Linggi River Basin, Malaysia which was polluted by various urban, industrial and agricultural wastes. A total of 86 diatom taxa belonging to 21 genera were recorded from all eig…
Various kinds of supported Ru cluster have been prepared by using the surface reaction of Ru3(CO)12 with inorganic oxides such as V2O5, SiO2, TiO2, Al2O3, K-doped Al2O3, and MgO followed by H2 reduction at 723 K. Their structures have been determined by means of EXAFS. Ru3(CO)12 supported on V2O5 was observed to be co…
Abstract Copper and copper alloys constitute one of the major groups of commercial metals due to their excellent electrical and thermal conductivities, corrosion and fatigue resistance, ease of fabrication, and good strength. This article lists the types, properties, fabrication characteristics, corrosion ratings, tem…
Abstract Conditions are described for preparing blends of cellulose with nylon 6 (Ny6) and poly(ε‐caprolactone) (PCL) from solutions in N,N‐dimethylacetamide (DMAc)– lithium chloride (LiCl) by coagulation in a non‐solvent. The binary blend films of both series, obtained over a wide composition range (10/90–90/10) from…
Magnetic properties of SmFe/sub 10/(Ti,M)/sub 2/ melt-spun ribbons were studied, where M is V, Cr, Mn, and Mo. The ribbons (M=V/Cr/Mo) quenched at 20 m/s exhibit the high coercivities of 4.2-5.5 kOe. Annealing the ribbons quenched at 40 m/s enhances their coercivities in the range of 5.9-10.0 kOe. In particular, SmFe/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyrolysis of acetylene in sonolytic cavitation bubbles in aqueous solutionEdwin J. Hart, Christian Herbert. Fischer, and Arnim. HengleinCite this: J. Phys. Chem. 1990, 94, 1, 284–290Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Publish…
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Abstract An attempt was made to clarify the effect of steam explosion conditions on the changes in morphology, degree of polymerisation P v , solubility towards aqueous alkali solution S a , and supermolecular structure of a soft wood pulp and to elucidate the mechanism by which the steam explosion treatment makes nat…
The hot corrosion of preoxidized 99% and 99.99% pure Ni covered with a thin Na 2 SO 4 film in a SO 2 ‐ O 2 gas atmosphere was investigated at 900°C by an electrochemical method using a sodium sensor and an oxygen probe. The preoxidation conditions were varied in order to affect the sulfidation of Ni, which resulted in…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
A general review of some of the theories proposed to account for the process of “bronze disease” is presented from both the historical and chemical points of view. The corrosion product of most serious concern, cuprous chloride, and its inter-relationship with some of the other important corrosion products of copper a…
Trinuclear complexes of general formulas [MCu2(CH3CO2)2(salpd)2](M = MgII, MnII, CoII, NiII, CuII, or ZnII) and [MNi2(CH3CO2)2(salpd)2](M = MgII, MnII, CoII, or NiII) were prepared, where H2salpd represents propene-1,3-diylbis(salicylideneimine). Further reactions of the complexes of the former series with sulphur dio…
A method for measuring the relaxation of internal stresses of optical fibers is developed. The authors discuss a few principal previous publications on the subject of annealing and relaxation of glass. The internal stress measurement setup is explained, and useful relations are given. It is pointed out that the relaxa…
Abstract This article provides a general overview of physical and mechanical properties, alloy compositions, applications, and product forms of cobalt-base alloys as wear-resistant, corrosion-resistant, and/or heat-resistant materials. The discussion is largely focused on cobalt-base alloys for wear resistance, as thi…
In Co-substituted Nd-Fe-B sintered magnets, several additional phases such as Nd(Fe,Co)/sub y/B/sub ?/ with y=2, 3, and 4 have been found besides the hard magnetic phase and the Nd-rich intergranular phase. The low coercivity of the magnet is attributed to the occurrence of these soft ferromagnetic phases. In Ga-doped…
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Abstract A study has been made of the thermal, X‐ray diffraction, and dynamic mechanical characteristics of polypropylene (PP1330, a copolymer containing 22% ethylene) filled with wollastonite. Various levels of β‐form crystallinity were produced in the PP by mixing in varying amount of wollastonite. It has been found…
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The preparation and characterisation of [MnL1(CH3CO2)2](1), [Mn6(µ4-O)2(C6H5CO2)10(H2O)4](9), [FeL1Cl3](10), [FeL2Cl3](2), and [Fe2L12(µ-O){µ-(CH3)3CCO2}2][ClO4]2(3) are reported where L1 and L2 are bis(benzimidazol-2-ylmethyl)amine and bis(benzimidazol-2-ylmethyl)methylamine. The molecular structures of (1), (2), and…