Materials Literature
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Abstract The adsorption of Li, Na, K, Cs, and Sr to montmorillonite is studied within the framework of a model that accounts for specific binding as well as adsorption in the double layer region. Variations in solution concentrations of cations due to adsorption are explicitly considered. The experimental data include…
Plipastatins have been isolated as part of a program designed to find inhibitors of porcine pancreatic phospholipase A2. They were purified from fermentation broth of Bacillus cereus BMG302-fF67 and finally separated into four fractions by reverse phase HPLC. The respective fractions were designated as plipastatins A1…
The inrush current associated with energising power transformers can cause interference and damage to other system components. The paper sets out to describe an accurate analytical method which can be used to find the inrush current in any 3-phase transformer in common use. The method is an extension of one previously…
The Diels–Alder Cyclodimerization of buta-1,3-diene to 4-vinylcyclohexene was found to be catalysed by non-acidic zeolites, especially large-pore zeolites such as Na-ZSM-20, Na-β, and Na-Y, and also by carbon molecular sieves.
Abstract The phase morphology and polymer chain orientation in polyethylene‐polycarbonte blends is investigated. A blend with a dispersed polyethylene phase was found to exhibit phase growth under quiescent conditions. Addition of a styrene‐(ethylene/butene) block copolymer controls the phase morphology and prevents p…
Dissolution-repassivation behavior of AISI 304 stainless steel (SS) in 42% MgCl2 at 143 C was investigated using a straining electrode technique at different potentials. Dissolution current, i(t), was expressed as i(t) = Jo•exp(−βt), where Jo is the initial dissolution current density (CD) of slip steps, β is the deca…
The hydrolytic and radlolytic degradaton of octyl(phenyl)-N,N-dIIsobutylcarbamoylmethylphosphine oxide [0ϕD(lB)CMPO] has been investigated by measuring the distribution ratio of Am, D., between degraded organic solutions and aqueous solutions of selected HN03 concentrations and by measuring the concentration of OϕD(IB…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterlayer spacing of 3d transition-metal intercalates of 1T-cadmium iodide-type titanium disulfide (TiS2)Masasi Inoue and Hiroshi NegishiCite this: J. Phys. Chem. 1986, 90, 2, 235–238Publication Date (Print):January 1, 1986Publication History Published online1 May 2002Publi…
Photoexcitation of the oxygen-to-tungsten charge-transfer band of [BW12O40]5– in the presence of CH3OH leads to the formation of [BW12O40]6–, H2, and formaldehyde at 2.0 < pH < 9.4, with a resultant liberation of protons from CH3OH. Low values (1.6–1.8) of the kinetic isotope effect imply that the electron transfer fr…
Preparation de materiaux polymeres retardateurs de flamme au moyen d'additifs sans halogenes, induisant un comportement intumescent dans les polymeres
A liquid extrusion method for determining pore volume distributions has been developed that is especially useful for, but not restricted to, characterizing fibrous materials. It involves gravimetric monitoring of liquid that drains from an initially saturated sample as incremental increases in pressure gradient are ap…
The optical transitions induced by doping poly(3-methylthiophene) or polythiophene with BF 4 − or ClO 4 − have been investigated by in-situ spectroscopy in an opto-electrochemical cell. From the number of doping-induced bands and concentration dependence we found evidence that polarons are the primary electronic excit…
Accepting the widely held view that all glass transitions have the same features, a particularly simple model of a liquid of long rod molecules is studied. It is shown that the equations of motion of such a system are remarkably simple and permit simple intuitive pictures of the glass transition to be translated into…
The nematic substance 5CB is known from N.M.R. studies to be slightly biaxial, not in the sense that any bulk property measured in a direction at right angles to the director is liable to vary with rotation about the director, but in the sense that there are biaxial terms in the ordering matrix that describes the alig…
The [MoO(bdt)2]–/[MoO(bdt)2]2–(H2bdt = benzene-1,2-dithiol) redox couple, in dimethylformamide solution, is a fully reversible process at E½=–350 mV vs. standard calomel electrode and each of these anions has been characterised by X-ray crystallography; the metal–ligand bond lengths of the former are slightly shorter…
Some biforked mesogens belonging to five series were prepared and studied. They exhibit an interesting polymorphism in which both columnar and lamellar mesomorphic orders coexist at different temperatures. The short chains lead to the classical nematic phase and/or the smectic C phase. The long ones give evidence of a…
The crystal structure of hollandite from Gowari Wadhona, India has been refined. Chemical formula determined by EPMA and moisture counter is (Ba0.75K0.38)1.13 (Mn7.85Fe0.15)8O16·0.41H2O. The structure is monoclinic, I2⁄m, and cell constants are a=10.006(3)Å, b=2.866(1)Å, c=9.746(2)Å, β=91.17(3)°. Each atom exists on a…
The cytoplasmic 5S ribosomal RNA (rRNA) sequences from seven red algae, a golden-yellow alga, a diatom and five brown algae have been determined. Using these sequences, phylogenic tree of these organisms have been constructed.Three types of algae, i.e., Rhodophyta (red algae), green algae (members of green plants), an…
This paper presents a study of corrosion and stress corrosion cracking (SCC) of Alloy 600. The primary purpose of this work is to relate the corrosion susceptibility of the alloy after various heat treatments to the microstructure produced by these heat treatments. Three commercial alloys and three laboratory alloys w…
The book offers a distillation of experience with materials selection and corrosion control methods in the process industries from specially selected experts in more than 57 specific subject areas. As a result, each paper endeavors not only to provide some theoretical background for a specific subject, but also to exp…