Materials Literature
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A comparison of the structure and performance behaviour of two popular models for modelling diffusion-controlled kinetics in free radical polymerization (the so called Chiu-Carratt-Soong, CCS, and Marten-Hamielec, MH, models) is presented. It is demonstrated that if some modifications on their structure are made, and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain dynamics in coronas of ionomer aggregatesZhisheng Gao, Xing Fu Zhong, and Adi EisenbergCite this: Macromolecules 1994, 27, 3, 794–802Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://pubs.acs.o…
The effect of an increase in hydrostatic pressure (from 1 to 300 atm) on the composition of the corrosion layer formed on 6061 T6 aluminium alloy in sea water was studied using electrochemical (polarisation potentiodynamic curves and impedance measurements) and surface analysis (X-ray photoelectron spectroscopy and Fo…
The complexes [RuII(tacn)(bipy)(OH2)]2+1 and [RuIV(tacn)(bipy)O]2+2(tacn = 1,4,7-trimethyl-1,4,7-triazacyclononane, bipy = 2,2′-bipyridine) have been synthesised and their crystal structures determined: 1, monoclinic, space group C2/c, a= 34.093(4), b= 10.430(1), c= 17.369(2)Å, β= 118.54(1)° and Z= 8; 2, triclinic, sp…
Abstract This paper presents the growth process of a new organometallic nonlinear optical (NLO) crystal triallylthiourea mercury bromide (ATMB). The growth conditions are analyzed in terms of the pH value of solution, and also crack of the crystal is interpreted according to anisotropy of thermal expansion coefficient…
Dendritic structures are the predominant microstructural constituents of solidified alloys. The microstructural scales of dendrites, such as primary and secondary arm spacings, control the segregation pattern that largely determines the properties of the material. Within the past decade significant developments in und…
In parts I and II of this series, the dominant role of ‘‘primary’’ Raman moments of degree greater than one, to Raman intensities for molecules forming a uniform coating on pairs of spherical particles in close proximity, is demonstrated. In this paper, the effect of chain length, coverage, particle size, and separati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirecting Polymorph Selectivity During Nucleation of Anthranilic Acid on Molecular SubstratesPhillip W. Carter and Michael D. WardCite this: J. Am. Chem. Soc. 1994, 116, 2, 769–770Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published…
Commercially complexed and chelated mineral supplements (5 Cu, 5 Zn, and 5 Mn products) were evaluated for solubility of their metals at concentrations of .125, .25, .5, 2.5, and 12.5 mg/ml in buffers at pH 5 and 2. At pH 5, solubility was related inversely to concentration, and most products were highly soluble at th…
The aim of this study was to investigate the interfacial shear strength between ice and rubbers. Different rubber materials containing only a polymer and curing agent (peroxide) were tested with regard to surface wettability and interfacial shear strength. The effect of different grades and amounts of carbon black fil…
Zircaloy-4, in three different metallurgical forms (stress relieved, recrystallized, and β-quenched), was oxidized at 400°C, in steam, up to 95 days. For each sample, the fraction of tetragonal zirconia was measured by X-ray diffraction and Raman spectroscopy. These two techniques show the presence of several zones co…
A Ca(2+)-calmodulin dependent histone 3 kinase was partially purified from a low salt (150 mM NaCl) nuclear extract of mouse leukemia cells by calmodulin-Sepharose affinity chromatography. In vitro, the kinase activity transferred gamma-phosphate from ATP to histone 3 to form an acid-labile and alkaline-stable linkage…
The methods for producing magnesium are briefly described and its alloying behaviour is discussed with particular reference to the roles of individual alloying elements. Cast and wrought alloys are considered separately and particular attention is paid to microstructure–property relationships and corrosion behaviour.…
Fourier transform infrared matrix measurements carried out in conjunction with ab initio calculations reported in a companion paper by Rittby have resulted in the first identification of two fundamental vibrations, the C=C stretching mode ν3(σu)=1955.2 cm−1, and the Si–C stretching mode ν4(σu)=898.9 cm−1, of the SiC3S…
Abstract
Structural data derived from X-ray powder diffraction and EXAFS spectroscopy are presented for iodosylbenzene (PhIO) and the imido analogue, PhINSO2-4-Me-C6H4, which indicate that these compounds are polymeric in the solid state.
In a Ti–15V–3Cr–3Sn–3Al alloy, the internal structure of {332}〈113〉 deformation twins formed by weak rolling at 77 K was studied by means of transmission electron microscopy. {332}〈113〉 deformation twins accompany very characteristic dislocation loops attached to the twin/matrix interface in the matrix. Inside the twi…
A magnesium–manganese hydroxycarbonate with the hydrotalcite structure has been synthesized by coprecipitation from aqueous solutions of Mg2+ and Mn2+. According to temperature-programmed reduction data, 84% of the manganese is oxidized to Mn3+ during synthesis. Fourier-transform infrared spectroscopy, powder X-ray di…
The effect of water-soluble plasticizers viz propylene glycol (PG), glycerol and polyethylene glycol 600 (PEG) on the morphology and water resistance of polyvinyl alcohol (PVA) films was investigated. Polyvinyl alcohol films were cast from aqueous solutions, and their morphology studied using differential scanning cal…
The main sign characterizing brown ring disease (BRD) in Manila clam Ruditapesphilippinarum is a brown conchiolin deposit on the inner surface of the shell. Different stages of deposit formation and of the shell repair process were examined by means of binocular microscopy. The surface area of the deposit was quantrfi…