Materials Literature
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Abstract The interband absorption coefficient of GeSe single crystals near the fundamental absorption edge is analyzed on the basis of a two‐dimensional model and is found to correspond to an indirect forbidden transition. The optical energy gap at room temperature is found to be (1.066 ± 0.011) and (1.078 ± 0.010) eV…
ADVERTISEMENT RETURN TO ISSUEPREVArticleRing dynamics in a crystalline analog of bisphenol A polycarbonateP. Mark Henrichs and Henry R. LussCite this: Macromolecules 1988, 21, 3, 860–862Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue 1 March 1988https://pubs.acs.or…
The concept of polarization resistance is introduced, considering a real current-voltage characteristic of the electrochemical system. Then some mathematical methods, developed by the author and not currently available in literature, are discussed, which allow its evaluation. The numerical methods considered are linea…
Abstract Soil samples were collected by horizon from three pedons that formed an Argialboll‐Argiaquoll sequence. The soil samples were mechanically dispersed in distilled water and samples of the clay fraction were separated by sedimentation. Portions of these clay samples were given various standard pretreatments and…
The microstructure of a sintered magnet made from Zr-containing NdFeB material was investigated using optical microscopy and scanning and transmission electron microscopy. The authors observed three phases in addition to those found in the ternary alloy. Two of these phases were Zr-rich, one having a lamellar structur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrachain rotations in the poly(ester carbonates). 2. Quantum-mechanical calculations on large model molecules fully representing each type of phenyl ring environmentJozef Bicerano and Hayden A. ClarkCite this: Macromolecules 1988, 21, 3, 597–603Publication Date (Print):Mar…
Abstract Methods are described for the preparation of cobalt(II) deuteroporphyrin and cobalt(II) tetrakis(p-sulfonatophenyl)porphine anchored on alumina beads coated with polyaminesulfone-A. Wavelength dispersive X-ray microanalysis showed that the cobalt(II) porphine distributes within the catalyst outer surface laye…
It is well known that Rb3H(SeO4)2 experiences two reversible phase transitions I↔II (at 606 K) and II↔III (at 448.5 K) /1,2/.
Fabrics used in firefighters' protective clothing were exposed to simulated sunlight from a xenon are Weather-Ometer and heat in a forced air circulating oven, and the resulting changes in properties were measured (color, tearing strength, flame resistance and thermal protective performance). The thermal shrinkage and…
Abstract Fast breeder reactors use liquid sodium metal as the coolant in their primary and secondary circuits. Corrosion behaviour and compatibility of structural materials in sodium at the operating temperature of the reactors has been found to be influenced by oxygen impurity in sodium even at parts per million leve…
The purpose of this report is to present evidence supporting the thesis that the major mode of penetration of nylon ballistic panels by fragment-simulating projectiles is a cutting, shearing mechanism: Shear forces required for yarn failure are usually less than tensile forces. Penetration is always at a slight angle,…
Single crystals of Mg 1‐ x Fe x O, x = 0.01, have been oxidized in air at temperatures between 1146 and 1389 K to determine the kinetics of the internal oxidation reaction. A two‐phase region composed of MgFe 2 O 4 precipitates in a (Mg, Fe)O matrix grows inward from the surface as the reaction progresses. The thickne…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCis and trans olefin radicals: equilibrium and photoisomerizationT. W. Ebbesen, R. Akaba, K. Tokumaru, M. Washio, S. Tagawa, and Y. TabataCite this: J. Am. Chem. Soc. 1988, 110, 7, 2147–2151Publication Date (Print):March 1, 1988Publication History Published online1 May 2002P…
Abstract The crystal and molecular structure of the title compounds, [CoIIICl(tpp)(H2O)], has been determined by means of X-ray diffraction techniques. The compound crystallizes in the monoclinic system; space group P21⁄c. The unit cell has a=13.542(2), b=25.760(2), c=10.423(1) Å, β=99.33(2)°, and Z=4. The cobalt atom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-pressure study on intramolecular excimer formation of 1,3-di-1-pyrenylpropane in various solventsKimihiko. Hara and Hiroyuki. YanoCite this: J. Am. Chem. Soc. 1988, 110, 6, 1911–1915Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Publ…
Linear and quadratic magnetoelectric (ME) effects have been simultaneously detected in Co-Br boracite(Co3B7O13 Br) ME coefficients a23, a32 and B311. have been measured versus temperature. The results are consistent with the symmetry m′m2′ down to 4 K.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetection of the Fe-O-O-Fe intermediate in the oxidation reaction of ferrous porphyrins by resonance Raman spectroscopyInsook R. Paeng, Hideaki. Shiwaku, and Kazuo. NakamotoCite this: J. Am. Chem. Soc. 1988, 110, 6, 1995–1996Publication Date (Print):March 1, 1988Publication…
Abstract The morphology and microstructure of a stabilized fiber, nonburning fiber, has been investigated under optical and electron microscopes, and a model for the structure of the stabilized fiber is presented. Skin‐core morphology was found in the cross section of the stabilized fiber. The proposed model is consis…
Mediastinal bronchogenic cysts develop from abnormal budding of the primitive tracheobronchial tree. They are usually located in the mediastinum at the level of the tracheal bifurcation. In adults they are frequently asymptomatic and are discovered incidentally on the chest radiograph. As they enlarge they may cause s…
A concentration dependence of elastic and viscous properties of nematic poly-\ensuremath{\gamma}-benzyl glutamate (PBG) was studied experimentally. The splay and bend constants are similar in magnitude, both linear in concentration. The twist constant is much smaller and constant. Viscosities exhibit large anisotropie…