Materials Literature
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A method allowing observation of calcium carbonate nucleation on the sheaths of cyanobacteria and other microorganisms is described. Nucleation of calcite was obtained on the sheaths of Lyngbya aestuarii and Scy‐tonema myochrous cultures but not on Entophysalis major and Pseudanabaena minuta. Differences in the rate o…
Cation-deficient nickel oxides have been investigated by X-ray photoelectron spectroscopy. The high-binding-energy features in the O(1s), Ni(2p) X.p.s. of defective NiO are described as multielectron final states, induced by defective sites. These sites are described as (NiO6)9– molecular clusters because of the d hol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToroidal microstructures from water-in-oil emulsionsJoel M. WilliamsCite this: Langmuir 1988, 4, 1, 44–49Publication Date (Print):January 1, 1988Publication History Published online1 May 2002Published inissue 1 January 1988https://doi.org/10.1021/la00079a007RIGHTS & PERMISSI…
The performance of multilayers at the X-UV wavelengths depends upon the structural and geometrical imperfections of the deposited materials. These two respective contributions are not easily separated when only one Bragg peak is recorded, as is usually the case in the X-UV range, so a prediction of the performance at…
The development of microwave ferrite materials and devices over the last thirty years is traced. The status of materials, devices, and theoretical understanding prevalent in the mid-1950s is first reviewed. Developments in materials engineering of garnets and lithium ferrites in the 1960s and 1970s are described, alon…
The magnetizing inrush current which occurs at the time of energization of a transformer is due to temporary overfluxing in the transformer core. Its magnitude mainly depends on switching parameters. A system for measuring the inrush current is described. The system is also capable of presetting various combinations o…
Diatom species were classified as environmental indicators based on the species groups of benthic diatoms presented by KOSUGI (1987) and on planktonic diatoms from Tokyo Bay and Uraga Channel. All data on diatom ecology were obtained from living cells discriminated by the staining method (KOSUGI, 1985).The species gro…
The measurement of surface charging on a spacer in a +or-500-kV HVDC gas-insulated switchgear (GIS) is performed by a capacitive probe set inside the gas tank. The various factors that cause measurement errors are examined using a simple model. An analytical method to correct the measurement errors and transform the p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and magnetism of the first alternating bimetallic chain compound MnCu(obp)(H2O)3.cntdot.H2O (obp = oxamidobis(propionato))Yu Pei, Olivier Kahn, Jorunn Sletten, Jean Pierre Renard, Roland Georges, Jean Claude Gianduzzo, Jacques Curely, and Qiang XuCite this: Inorg.…
A monitor system is described for the control of particle growth by crystallization in real pharmaceutical suspensions, based on the measurement of drug concentration in the liquid phase in contact with the drug crystals. The control unit consists of a thermostated vessel containing the drug suspension and a monitorin…
The passivity of metals is reviewed from the perspective of materials science rather than with the usual electrochemical emphasis. Iron and ferrous alloys are used to illustrate the essentials of the phenomenon of passivity. A discussion of the general and engineering aspects is first given followed by a detailed desc…
Thermal desorption studies and electrical conductivity measurements have been used to investigate the solubility of hydrogen defects in barium titanate ceramics in oxidizing atmospheres. Hydrogen is found to dissolve in the perovskite lattice of undoped and acceptor‐doped BaTiO 3 by the formation of hydroxide ions on…
Dislocation wall and cell structures in deformed metal crystals are reviewed briefly, emphasizing the heterogeneity of the dislocation distribution. The evolution of the dislocation substructure is discussed in terms of work hardening and dynamic recovery. The main part of the paper deals with the so-called composite…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic analysis of phase-separation kinetics in model polyurethanesHan Sup Lee, Ying Kang Wang, William John MacKnight, and Shaw Ling HsuCite this: Macromolecules 1988, 21, 1, 270–273Publication Date (Print):January 1, 1988Publication History Published online1 May 200…
Abstract Precipitation is a rapid solidification. As a rule, it applies to substances which are sparingly soluble and is coupled with a chemical reaction or with a salting out process. The chemical engineer has to ensure that the product obtained has a constant and preferably coarse size distribution. This contributio…
Preface. About the author. Introduction. Geometry of areas. Kinematics and statics of rigid systems. Determination of constraint reactions. Internal beam reactions. Statically determinate beam systems. Analysis of strain and stress. Theory of elasticity. The Saint Venant problem. Beams and plates in flexure. Finite el…
This review article, based on a lecture delivered in Madras in 1985, is an account of the author's experience in the working out of the molecular structure and conformation of the collagen triple-helix over the years 1952-78. It starts with the first proposal of the correct triple-helix in 1954, but with three residue…
Reaction kinetics in a coarse equimolar powder mixture were slow enough to allow for the different stages to be identified, notably in the lower and higher temperature ranges, respectively. In the former ( T ≤ 1600 K), Al 2 TiO 5 nucleation was hindered by the strain energy contribution to the overall driving force. T…
The present study was undertaken to elucidate the mechanism of in vitro cell killing induced by 1.0 MHz continuous wave ultrasound at an intensity of 5.8 W/cm2. The chemical effects and mechanical effects arising from acoustic cavitation were determined by the amount of liberated iodine and the number of DNA double-st…
Galvanic corrosion can be defined simply as that corrosion that occurs as a result of one metal being in electrical contact with another in a conducting corrosive environment. The corrosion is stimulated by the potential difference that exists between the two metals, the more noble material acting as a cathode where s…