Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLinear Crystallization Velocities of Sodium Acetate in Supersaturated SolutionsPaul L. Dietz Jr., John S. Brukner, and C. A. HollingsworthCite this: J. Phys. Chem. 1957, 61, 7, 944–948Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Publishe…
Sterilization of nutrient media is an operation essential to all industrial fermentation processes re- quiring pure culture maintenance.AMethods for steri- lizing nutrient media include 1) heating, 2) filtration, 3) irradiations, 4) sonic vibration, and 5) exposure to chemical agents.Because heating the medium, usuall…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoreduction of Ceric Ion in Sulfuric Acid Solutions. Effect of Thallous Ion2aThomas J. SworskiCite this: J. Am. Chem. Soc. 1957, 79, 14, 3655–3657Publication Date (Print):July 1, 1957Publication History Published online1 May 2002Published inissue 1 July 1957https://pubs.a…
The susceptibility of a single crystal of ytterbium ethyl sulphate has been measured between 20°k and 1°k, Below 4°k the results obeyed the relations Xπ = 1.08/T per mol, and X⊊ =0.0615 per mol. These measurements served to identify the ground doublet state of the ytterbium ion in this case as |J= 7/2 , J5= ± 8/2 >. T…
Examination of tobermorite, 4–SCaO.5SiO 2 .‐5H 2 O, and xonotlite, 5CaO.5SiO 2 .H 2 O, by infrared absorption revealed striking structural similarities and differences in the two phases. In the 8‐ to 15‐ μ region, the absorption was the same for both; the differences arose from the manner in which water and hydroxyl i…
Abstract Values of limiting viscosity number, Huggins' interaction constant, k ′, osmotic molecular weight and Flory‐Huggins' constant, μ, of masticated and unmasticated rubber have been compared. A calibration of limiting viscosity against molecular weight has been obtained formasticated rubber, but one is not availa…
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…