Weldability of modern structural steels in Japan.
The designation HT 50, HT 60, and HT 80 in this paper means the grades
Materials Literature
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DUST-ABATEMENT MATERIALS: EVALUATION AND SELECTION
The purpose of this paper is to provide (a) a guide for selecting the correct type of dust palliative and application rate for a given situation, (b) information to evaluate alternatives in terms of cost and energy, and (c) application guidelines to ensure the best job for a given situation. Descriptions of current co…
Carbon‐13 NMR microstructural characterization of dichlorocarbene adducts of polybutadiene
Abstract 13 C‐NMR has been used to examine a number of dichlorocarbene adducts of cis ‐ and trans ‐polybutadiene prepared in a two‐phase system. Dichlorocarbene was generated by reaction of aqueous or solid NaOH or KOH with CHCl 3 in the presence of a phase transfer catalyst. Monomer compositions, comonomer sequence l…
Poly(ethylene sulfide): Reevaluation of the electron diffraction structure analysis
The single-crystal electron diffraction data of poly(ethylene sulfide) reported by Hasegawa, Claffey, and Geil have been reinvestigated. Taking into account possible crystal bending effects and dynamical scattering leads to an improved structural model. The final agreement factor of R = 0.21 is considerably better tha…
Electronic Structure of Ion‐Radical Organic Solids and Polyenes
Abstract The electronic structures of organic ion‐radical salts, molecular conductors, and charge‐transfer complexes are described by solid‐state models with one valence state per site. Similar models occur in π‐electron theories of conjugated molecules or in spin Hamiltonians for magnetic insulators. A localized or v…
Über die Kinetik der Fettkristallisation
Abstract Der Verlauf der Fettkristallisation ähnelt dem der Aggregation und Flockulierung von Kolloiden. Früher aus Meßwerten empirisch abgeleitete kinetische Gleichungen für Aggregation und Flockulierung werden auf Meßreihen der Fettkristallisation und der Ausscheidung aus Emulsionen angewandt. Die Meßwerte werden in…
Introduction to Engineering Materials
A text which deals with the basic principles of materials science and technology in a simple, yet thorough manner. This edition includes more worked examples and more detailed information on certain aspects of materials science
Multinuclear variable-temperature nuclear magnetic resonance study of rhodium carbonyl clusters containing encapsulated heteroatoms: ligand and metal polyhedral rearrangements
Variable-temperature multinuclear n.m.r. studies (13C, 13C-{103Rh}, 13C-{31P}, and 31P) are reported for [Rh9E(CO)21]2–, [Rh10E(CO)22]3–(E = P or As), and [Rh12Sb(CO)27]3–. In all cases, complete fluxionality of both the carbonyl and metal polyhedra are observed at high temperatures, and at low temperatures it has bee…
Evolution of glauconite in imperfectly drained sandy soils of the Belgian Campine
Abstract The evolution of glauconite in an imperfectly drained glauconiferous profile with texture B horizon in the Antwerp Campine (Belgium) has been studied by using different techniques (DTA, TGA, XRD and chemical analysis). It has been found that (1) the glauconite sand grains are mechanically broken down into cla…
Development of pore structure in carbon cloth by HNO3 activation
A study has been made of the changes in the adsorptive behaviour of a carbon cloth with aqueous oxidative activation. It has been demonstrated that molecular-sieve action initially present in the cloth can be eliminated by progressive activation but eventually restored after the total pore volume of the cloth has been…
The Influence of Dissolution and Precipitation Behavior of M23 (C, B)6 on the Hardenability of Boron Steels
Cu-Ni-Cr-Mo-B low alloy steels whose total B content exceeds a certain limit show superior hardenability when they are austenitized at lower temperatures (≤900°C), although their hardenability decreases with higher austenitizing temperatures and longer holding times. As M23(C, B) 6 in these steels is partly undissolva…
Grafting of methyl methacrylate onto collagen initiated by tributylborane
Abstract The graft copolymerization of methyl methacrylate onto collagen initiated by tributylborane was investigated in aqueous medium. The total conversion, percentage of grafting and efficiency of grafting increased with increasing collagen content. The optimum conditions on the percentage of grafting and efficienc…
On orientation changes, deformation banding, and dislocation structures in rolled [100](001) oriented iron crystals
The texture formation process, dislocation structures, and deformation bands observed in rolled and cross rolled [100] (001) oriented iron crystals have been interpreted from the viewpoint of fundamental dislocation behavior and the properties of low-angle dislocation boundaries. Full agreement between theoretical exp…
Comparative Morphology of Arthropod Exterior Surfaces with the Capability of Binding a Film of Air Underwater
The air-binding surfaces of aquatic and semi-aquatic insects and spiders were examined under a scanning electron microscope. The bristles that are instrumental in binding the film of air show distinctive characteristics within each phylogenetic group. Very small species can often maintain themselves in a bubble of air…
Neutron scattering study of the reorientational motions for NH3 groups in (NH3(CH2)3NH3)MnCl 4
Incoherent quasi-elastic neutron scattering experiments have been performed on oriented crystals and on polycrystalline samples of (NH3(CH 2)3NH3)MnCl4 and (NH3(CD 2)3NH3)MnCl4 compounds in the 4-300 K temperature range. Backscattering and time of flight spectrometers were used; spectra were obtained using different r…
Dielectric Loss in Solids
Efficient utilization of electrical insulating materials in electrical apparatus, devices, and cables requires knowledge of the dielectric loss behavior of materials under specific voltage, frequency, and temperature conditions. The appearance of significant dielectric losses may not only represent an unnecessary ener…
Effect of Temperature on the Corrosion of 70/30 Copper–Nickel in Sea Water
This paper presents the results of experiments to investigate the effect of temperatureon the films found on 70/30 copper–nickel. The results show that the potential of 70/30 copper–nickel and 66/30/2/2 copper–nickel explain the poor resistance to impingement attack of this alloy at low temperatures, observed greater…
Toyopearl HW-65C: Ammonium Sulfate as a New Column Chromatographic Adsorbent for Enzyme Purification1
We found that Toyopearl HW-65C gel matrix adsorbed ferredoxin and ferredoxin-NADP+ reductase in the presence of concentrated ammonium sulfate. Ferredoxin was strongly adsorbed on the gel in 80% saturated ammonium sulfate, and ferredoxin-NADP+ reductase was adsorbed in 40% saturated ammonium sulfate. The phenomenon was…
Study of small-port and large-port mordenite modifications. Part 1.—Preparation of the HM forms
Two procedures for the preparation of HM forms from both small-port mordenite (SPM) and large-port mordenite (LPM) have been studied. The procedures are acid attack of the NaM form and calcination of the NH4M form. The solids were characterized by chemical analysis, benzene adsorption, X-ray diffraction and precise me…
Purification and characterization of orotidine-5'-phosphate decarboxylase from Escherichia coli K-12.
Using blue Sepharose affinity chromatography, we purified orotidine-5'-phosphate decarboxylase over 600-fold, to near homogeneity, from strains of Escherichia coli harboring the cloned pyrF gene on the multicopy plasmid pDK26. The purified enzyme has a subunit molecular weight of 27,000 but appears to be catalytically…