Materials Literature
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Abstract Curing of carboxylated nitrile rubber (XNBR) with epoxy resin in presence of different fillers has been studied. It was observed that 7.5 phr of resin give a compromise combination of properties in FEF black (N 550)‐filled vulcanizates at 40 phr loading. Further studies at different loadings of black, reinfor…
The electric insulators for superconducting magnet coils to be used in a large fusion reactor are subjected to large compressive and tensile stresses to a maximum level of about 400 MPa, and these stresses should pose a significant electrical insulating problem in practice. In this paper, dc and ac dielectric breakdow…
The change in the morphology of lath martensite with deformation of austenite (ausforming) has been studied by using an 18 % Ni maraging steel. Specimens in austenitic state were deformed in tension by several strains (true strain ε = 0.1 ∼ 1.0) at 773 K (which was above Md temperature). In the case of conventionally…
In this review it has been pointed out that vitamin B6 and its vitamers can be involved in many interactions with a number of drugs, as well as with the actions of various endocrines and neurotransmitters. Nutritional deficiencies, especially of vitamins and proteins, can affect the manner in which drugs undergo biotr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas-phase heteroaromatic substitution. 2. Electrophilic methylation of pyrrole and N-methylpyrrole by CH3XCH3+ (X = fluoro, chloro) ionsGiancarlo Angelini, Cinzia Sparapani, and Maurizio SperanzaCite this: J. Am. Chem. Soc. 1982, 104, 25, 7084–7091Publication Date (Print):De…
Measurements of the pressure ($P$) dependence of the superconducting transition temperature ${T}_{c}$ of K${\mathrm{C}}_{8}$ and KHg${\mathrm{C}}_{4}$ are reported. K${\mathrm{C}}_{8}$ undergoes a first-order transition from a ${T}_{c}=0.13$ K to a ${T}_{c}=1.7$ K phase over the range $2<~P<~15$ kbar. A KHg${\ma…
The Fermi surface of NiTi, which has the B2 structure, was calculated. The results were used to find the nesting conditions epsilon i (k)=- epsilon i (k+Q). A theory of phase transitions in NiTi based on the temperature-dependent Green function method is suggested. The theory agrees satisfactorily with experimental re…
Abstract The gas‐phase decomposition of n ‐heptyl‐1 and n ‐heptyl‐2 hydroperoxides C 7 H 15 OOH, which split into two radicals C 7 H 15 O and OH, has been investigated in the temperature range of 250–360°C. The decomposition has been carried out in a hydrogen–oxygen mixture (the hydroperoxide represents about 50 ppm)…
Dislocations interact with grain boundaries during yielding, creep, and recrystallization. It will be assumed that the dislocation model for grain boundary structure is valid generally. Consequently, Burgers vectors are conserved and dislocation lines can end only on other dislocations or free surfaces. The following…
Following a major shortage of 99Mo in the 2009–2010 period, concern grew that the aging reactor production facilities needed to be replaced. Most producers were using highly enriched 235U (HEU) as the target material. The Organisation for Economic Co-...Read More
Fracture mechanics techniques were employed to study stress corrosion cracking (SCC) of AISI C‐1018 mild steel in hot (92°C) solutions of and . Tests were conducted under potentiostatic conditions at the most susceptible SCC potentials near the active‐passive transition, using fatigue precracked double cantilever beam…
Both the denaturation, as followed by UV absorbance and fluorescence changes, and inactivation of creatine kinase in guanidine solutions have been found to be first order reactions. In 3 M guanidine, at 30 degrees C, the inactivation rate constant was found to be 5.9 sec-1 and the denaturation rate constant 1.9 sec-1.…
Abstract Raman spectra of anhydrous crystalline powders of all the lanthanide trimetaphosphates (with the exception of Pm(PO 3 ) 3 ) and of yttrium trimetaphosphate have been obtained. These data have been interpreted in a systematic manner based on the known structures of these compounds. Variations of the vibrationa…
As a simple model for α-AgI, a system with ionic potentials consisting of only a Coulombic and a soft-core repulsive terms is investigated with use of a molecular dynamics method. The system has interesting scaling properties and is characterized by the ratio of the ion core radii and \(\varGamma\), the ratio of poten…
Résumé L'étude expérimentale de l'adsorption d'ions La 3+ sur une smectite, successivement saturée en ions K + , Na + puis Ca 2+ , montre que la stoechiomérie de l'échange s'effectue dans le rapport des charges des cations participant à la réaction. Dans un domaine de force ionique suffisamment restreint, l'échange a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic and Moessbauer resonance investigations of the weak ferrimagnet iron molybdate (Fe2(MoO4)3)Z. Jirak, R. Salmon, L. Fournes, F. Menil, and P. HagenmullerCite this: Inorg. Chem. 1982, 21, 12, 4218–4223Publication Date (Print):December 1, 1982Publication History Publis…
The paper constitutes a systematic theoretical and experimental investigation into impulse breakdown voltage time curves of coaxial-cylinder gaps in SF6 and a 50% SF6-50% N2 mixture. The breakdown time delay probability is treated as a bivariate distribution in statistical and formative time lags. A method is develope…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIron(III)-porphyrin .pi.-cation radical complexes. Molecular structures and magnetic propertiesGeorges Buisson, Alain Deronzier, Emile Duee, Pierre Gans, Jean Claude Marchon, and Jean Rene RegnardCite this: J. Am. Chem. Soc. 1982, 104, 24, 6793–6796Publication Date (Print):D…
Abstract Azoles such as benzotriazole and benzimidazole are used as corrosion inhibitors, particularly for copper. The purpose of this work is to further illuminate the bonding and film growth for benzimidazole‐like structures. The interaction of imidazole, benzimidazole, 2‐methylbenz‐imidazole and benzotriazole with…
The optical transparency and refractive index were measured over a wide wavelength range from the UV into the infrared for five glasses of potential use for long-wavelength optical fibers. The glasses contain 30-50 mole % Ge0(2) with the addition of Bi(2)O(3), Tl(2)O, PbO, and Sb(2)O(3). Indices were measured with a c…