An Apparatus and Technique for the Forcible Silking of Spiders
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Bonding in a binuclear metal carbonyl: experimental charge density in Mn2(CO)10
X-ray diffraction data (Ag Ka and Mo Net radiation) have been collected at 74 K on dimanganese decacarbonyl Mn2(CO)I 0, and the crystal structure was refined. The atomic positional and thermal parameters were determined from high-angle AgKa data to avoid systematic errors due to bonding effects. The molecular geometry…
Review on Metal-Filled Plastics. Part1. Electrical Conductivity
Plastic composites are members of both the oldest and the newest of materials. The first reinforced polymeric-based materials are recorded in Genesis and Exodus in the Bible as being used by the people of Babylonia and Mesopotamia around 4000–2000 B.C. These materials consisted of bitumen-based pitch for building prod…
Mixed discretization procedure for accurate modelling of plastic collapse
Abstract Collapse loads are overestimated by finite‐element or finite‐difference procedures when the material discretization does not allow locally incompressible plastic flow: for example, constant‐strain triangles or tetrahedra give unacceptable results. The use of different discretizations for the isotropic and dev…
Determination of the hydrogen site occupation in the α phase of zirconium hydride and in the α and β phases of titanium hydride by inelastic neutron scattering
Inelastic neutron scattering measurements have been used to determine the site occupied by hydrogen in alpha Zr-H and alpha and beta Ti-H. The measured optical peak frequencies were only consistent with hydrogen being located on the tetrahedral sites in all cases. The significance of the energy shift between the hydri…
XPS and AES Studies on the Oxidation of Layered Semiconductor GaSe
We have studied the oxidation of layered compound GaSe with no dangling bonds on the cleaved surface using XPS and AES techniques. At room temperature, the cleaved surface is not oxidized in an oxygen atmosphere. When subjected to Ar ion sputtering, the surface starts to exhibit the behavior of metallic Ga owing to di…
Diamagnetism and orientational order of nematic liquid crystals
Measurements are presented for the diamagnetic anisotropy of thirteen nematic liquid crystals. As any bias in the rotation around the long molecular axis is most probably small, the results probe accurately the temperature variations of S, the degree of orientational order. The critical behaviour of S near the nematic…
Rapid solidification
Points of progress in current understanding of rapid liquid to solid transformation are reviewed. Emphasis is placed on those aspects of the emerging science that would permit development of guidelines and predictive models for alloy design and process control to achieve desired microstructures and properties. Recentl…
Mechanism of Crosslinking of Proteins by Glutaraldehyde I: Reaction with Model Compounds
3H-Glycine and 6-aminohexanoic acid were used as model amine compounds and reacted with glutaraldehyde. Based on the spectral characteristics and the molecular weights obtained from the reaction products, it is concluded that glutaraldehyde can modify amines to form an intermediate which absorbs at 300 nm and has a mo…
Effect of Moisture Content on Radon Emanation from Uranium Ore and Tailings
A study was made of the effect of moisture on the emanation coefficient and radon flux from uranium mill tailings. A sharp rise in emanation coefficient occurred as the moisture content was increased from the absolutely dry state to 2% water by weight. The emanation coefficients from water-saturated tailings were abou…
Kinetic Drumhead Model of Interface. I
A dynamical model is presented which describes the random motion of an interface of two coexisting phases. The Euclidean invariant stochastic equation of motion for the coordinate of the interface is derived systematically from the time-dependent Ginzburg-Landau model in the limit of infinitely deep potential well of…
Microbial Exopolysaccharides - their Role in Microbial Adhesion in Aqueous Systems
(1982). Microbial Exopolysaccharides - their Role in Microbial Adhesion in Aqueous Systems. CRC Critical Reviews in Microbiology: Vol. 10, No. 2, pp. 173-201.
New display based on electrically induced index-matching in an inhomogeneous medium
The operation of a new light modulation device that employs electric field controlled light scattering in an inhomogeneous medium is described. The orientation of a nematic liquid crystal, contained in micrometer sized inclusions in a nonabsorbing solid, is changed to produce a varying refractive index. When the refra…
Patterns of Adsorption of Proteins From Human Plasma Onto Foreign Surfaces
The deposition of proteins on blood-contacting surfaces is known to be a determining factor in subsequent thromboembolic events. The composition of the protein layers and how they change with time are unknown. To generate information relevant to these questions, the quantities of albumin, fibrinogen and IgG adsorbed o…
Ferroelasticity and related properties of crystals
This article reviews at an introductory level the main concepts used in the description of ferroelasticity and other related properties of crystals, viz. ferrobielasticity, ferroelastoelectricity, ferromagnetoelasticity, ferrotrielasticity, and ferrogyrotropy. The symmetry and phase-transition aspects of these propert…
Invited review article ordering of voids and gas bubbles in radiation environments
Dr. Kanwar Krishan graduated from Panjab University, Chandigarh and did his doctorate from the Indian Institute of Technology, Kanpur in 1971. He was subsequently a Visiting Fellow at the Tata Institute of Fundamental Research, Bombay where his research interests were in magnetism and defects in solids. In 1972 he joi…
Mechanism of Crosslinking of Proteins by Glutaraldehyde II. Reaction with Monomeric and Polymeric Collagen
Collagen in three different states, i.e. native soluble molecules, denatured molecules and reconstituted fibers, was exposed to various concentrations of glutaraldehyde. The degree of intramolecular and intermolecular crosslink formation was evaluated by measuring collagen solubility, beta and gamma chain formation, r…
Ziegler-Natta polymerization: the lanthanide model
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTZiegler-Natta polymerization: the lanthanide modelPatricia L. WatsonCite this: J. Am. Chem. Soc. 1982, 104, 1, 337–339Publication Date (Print):January 1, 1982Publication History Published online1 May 2002Published inissue 1 January 1982https://doi.org/10.1021/ja00365a083Requ…
Preparation, analysis, and characterization of carbonated apatites.
A range of synthetic carbonated apatites were characterized using infrared and Raman spectroscopy, X-ray diffraction, and chemical analysis and compared to stoichiometric hydroxyapatite and dental enamel. Synthetic apatites were prepared by aqueous precipitation and by solid-state reaction at high temperatures. A meth…
PHASE BEHAVIOR IN SYSTEMS OF NONIONIC SURFACTANT/ WATER/ OIL AROUND THE HYDROPHILE-LIPOPHILE-BALANCE-TEMPERATURE (HLB-TEMPERATURE)
The phase diagram of the C12H25(OCH2CH2)5OH/water/tetradecane system was studied around the critical solution temperatures of surfactant-water and surfactant-oil phases. Although the phase behavior is very complicated due to the formation of liquid crystalline phase, basic phase-changes around the three-phase region,…