Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The molecules vaporizing from V2O5(s) and VO(s) have been determined employing a mass spectrometer to analyze the vapors effusing from Knudsen cells containing these materials. The vapor over the V2O5 loaded cells was found to contain V4O10(g), V6O14(g), V6O12(g) with some evidence for V4O8(g) and V2O4(g). Since both…
The times taken for two plastics, polystyrene and polyethyl methacrylate, to break under various constant loads are reported for both the glassy and rubbery states. A theory is presented which describes the strength properties of plastics in the glassy state. The theory predicts that the logarithm of the time taken fo…
1. Methyl-O-fl-D-fructofuranoside has been pre- pared by the action of yeast invertase on sucrose in the presence of methanol.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of Linear Polyethylene by a Free Radical Route at Very High PressuresR. A. Hines, W. M. D. Bryant, A. W. Larchar, and D. C. PeaseCite this: Ind. Eng. Chem. 1957, 49, 7, 1071–1074Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Publ…
The antiferromagnetic resonance spectrum of single-crystal ${\mathrm{Cr}}_{2}$${\mathrm{O}}_{3}$ has been mapped within the wavelength region from 12 mm to 2.8 mm and magnetic field intensities from 0 oersteds to 30 000 oersteds. The resonance frequencies were observed in this region in a temperature interval from abo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPalladium Hydride. I. The Thermodynamic Properties of Pd2H between 273 and 345°K.1Donald M. Nace and J. G. AstonCite this: J. Am. Chem. Soc. 1957, 79, 14, 3619–3623Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Published inissue 1 July 195…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Depolymerization of Silica in Sodium Hydroxide SolutionsS. A. GreenbergCite this: J. Phys. Chem. 1957, 61, 7, 960–965Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Published inissue 1 July 1957https://pubs.acs.org/doi/10.1021/j150553a0…
Mass spectrometric study of the gaseous species effusing from a Knudsen cell filled with WO3 has shown that WO3(s) sublimes to form the gaseous molecules W3O9, W4O12, and W5O15. From the measured partial pressures for these species and their variations with temperature, ΔH, ΔF0, and ΔS0 of sublimation are obtained.
A technique similar to that used in crystal counter experiments is applied to the study of transit times of electrons and holes in thin evaporated films of amorphous Se carrying Au electrodes. Electron-hole pairs are generated near the top electrode by short electron pulses (or light flashes) of 10 -7 sec duration. Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPOLYNUCLEOTIDES. I. MOLECULAR PROPERTIES AND CONFIGURATIONS OF POLYRIBOADENYLIC ACID IN SOLUTION1Jacques R. Fresco and Paul DotyCite this: J. Am. Chem. Soc. 1957, 79, 14, 3928–3929Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Published in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE PROPERTIES OF AN ADENINE RIBONUCLEOTIDE PRODUCED WITH CELLULAR PARTICLES, ATP, Mg++, AND EPINEPHRINE OR GLUCAGONEarl W. Sutherland and T. W. RallCite this: J. Am. Chem. Soc. 1957, 79, 13, 3608Publication Date (Print):July 1, 1957Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic Studies on the Thermal Decomposition of t-Butyl Hydroperoxide in Dodecane SolutionB. Kathleen MorseCite this: J. Am. Chem. Soc. 1957, 79, 13, 3375–3380Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Published inissue 1 July 1957http…
Abstract The Flory-Rehner theory of swelling allows an estimate of the number of crosslinks in gum vulcanizates. In reinforced rubbers the apparent degree of crosslinking is raised by some fillers, particularly carbon blacks. It has been shown experimentally that, for vulcanizates of a given polymer at a fixed filler…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Heat of Sublimation of Boron and the Gaseous Species of the Boron–Boric Oxide SystemAlan W. Searcy and Clifford E. MyersCite this: J. Phys. Chem. 1957, 61, 7, 957–960Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Published inissue 1 Ju…
Abstract Modulus and swelling measurements were made on silicone rubber samples compounded with five different fillers. The data were at variance with the predictions of the theory of modulus reinforcement by Weiss, Rehner, Smallwood, and Guth. The results, when analyzed using a modification of the kinetic theory of e…
An x-ray analysis of tellurium oxide glass has been made. This glass is unusual in that it is made up of octahedra which exhibit a close order configuration such that four oxygens are found at a distance of 1.95 A and two others at 2.75 A. This configuration is similar to that found in the crystal. The way in which th…
Oxidation of UO2 to U3O8 in dry air and oxygen at temperatures of 160 to 350°C proceeds by a two-step reaction. In the first step the tetragonal oxide of composition UO2.34±0.03 is formed. In the second step this tetragonal phase is converted to orthorhombic U3O8. The rate controlling process in the first stage is the…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Evelyn M. Vaskas, "Note on the Wasserman-Wolf Method for Designing Aspheric Surfaces," J. Opt. Soc. Am. 47, 669-670 (1957) Export Citation BibTex Endno…
Abstract Infrared absorption spectra of oriented cellulose fibers have been observed using polarized radiation. Natural fibers are in general too thick but swelling them in NaOH solution followed by pressing, washing, and drying is an effective way of obtaining a suitable thickness in the 650–3100 cm. −1 region. The d…
By B. D. Cullity London : Academic Books Ltd. Reading, Mass : Addison-Wesley Publishing Co. Inc. Pp. 514 + xiv. Price 80s. The purpose of this book is to teach the reader with no previous experience the elements of X-ray diffraction theory, techniques and applications. The method of teaching this subject undoubtedly d…