Materials Literature
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The general chemical composition of untreated fibers of hemp, jute. and kapok has been studied, and the results have been compared to the composition of the corresponding α-celluloses and of the cellulose nitrates obtained by direct nitration of the original materials. After correction for nonglucose sugar residues, t…
An alloy of high magnesium content, 0.008 to 0.1% beryllium and 0.25% alumninum, is reported. Calcium may aleo be present (0.02 to O.44%). The alloys could be melted in their oxide skin in air without taking fire, e.g., for aircraft landing mats. (auth)
The existing literature pertaining to the use of sulfonates as corrosion inhibitors is reviewed briefly. An account is given of radiometric adsorption and desorption studies made of sodium and amine salts of sulfonic acids. Corrosion inhibitor studies also were made of these salts in H2S and CO2 environments; some of…
The use of sodium silicate as a corrosion control agent for open-recirculating cooling water systems is discussed. Emphasis is placed on the results of tests made with low-carbon steel coupons in eight operating plants. The normal development of silica films, effect of prior corrosion and the influence of pH, water te…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFree Energy of Immersion of Compressed Powders with Different Liquids. II. Silica PowderJ. J. Van Voorhis, R. G. Craig, and F. E. BartellCite this: J. Phys. Chem. 1957, 61, 11, 1513–1519Publication Date (Print):November 1, 1957Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCuring Process in Phenolic Resins Electron-Microscopic AnalysisRobert A. Spurr, Edward H. Erath, Howard. Myers, and Daniel C. PeaseCite this: Ind. Eng. Chem. 1957, 49, 11, 1839–1842Publication Date (Print):November 1, 1957Publication History Published online1 May 2002Publish…
The delta phase of the U--Zr alloy was found to be primitive hexagonal with c = 3.0B and a = 5.03 A and with a composition UZr/sub 2/.(W.L.H.)
Summary High temperatures affect buckling because the properties of the materials change and because thermal stresses and creep develop. A survey is given of the known solutions of problems arising in consequence of these phenomena and new theories of the creep buckling of columns and of thin circular cylindrical shel…
WO3 undergoes a phase transformation from monoclinic to orthorhombic at approximately 320°C and from orthorhombic to tetragonal at 720°C. A detailed study of the variation of the unit cell dimensions over the range from room temperature to 1000°C has been carried out using high-temperature x-ray diffraction techniques…
Physical properties of the two phosphor systems SrS: Ce,Sm, and SrS: Eu,Sm, as well as the base material SrS, have been studied. The optical studies concern spectra of transmission, excitation, fluorescence, phosphorescence, stimulation, and stimulated emission. Relative storage efficiencies of the major exciting wave…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChelate Compounds of Nickel(II) with Picolinic AcidR. W. GreenCite this: J. Am. Chem. Soc. 1957, 79, 21, 5608–5611Publication Date (Print):November 1, 1957Publication History Published online1 May 2002Published inissue 1 November 1957https://pubs.acs.org/doi/10.1021/ja01578a…
Abstract E. H. Farmer compiled a review of vulcanization which was published in 1946 as an important chapter in Volume II of “Advances in Colloid Science”. About two years later, Normann Bergem published a review under the same title. These authors dealt with the subject from rather fundamental points of view, but, be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of Transport Phenomena in the Cryolite-Alumina System by Means of Radioactive TracersWilliam B. Frank and L. M. FosterCite this: J. Phys. Chem. 1957, 61, 11, 1531–1536Publication Date (Print):November 1, 1957Publication History Published online1 May 2002Publish…
Abstract Methods of extracting potassium from soils by use of sulfuric acid have been developed. The amounts of K extracted from several Ohio and New York soils by these methods were compared with those extracted by neutral 1 N NH 4 OAc and boiling 1 N HNO 3 methods as means of furnishing a reliable index to the “plan…
Therefore it appears that purely 'mechanical' forces do not appreciably affect bond length, whereas bond angles are not as rigorous in their demands for constancy.
Phase equilibria in the binary system BaTiO 3 –SrTiO 3 were studied above 1200°C. This system is characterized by a complete series of solid solutions with a minimum at 2.5 mole % SrTiO 3 and 1585°C. The hexagonal BaTiO 3 phase is suppressed to a region extending no farther than 0.5% SrTiO 3 at 1600°C. No immiscibilit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Use of Snake-Cage PolyelectrolytesMelvin J. Hatch, John A. Dillon, and Hugh B. SmithCite this: Ind. Eng. Chem. 1957, 49, 11, 1812–1819Publication Date (Print):November 1, 1957Publication History Published online1 May 2002Published inissue 1 November 1957https…
Abstract The degree to which a polymer is rubbery is influenced by the detailed shape and chemical composition of the macromolecules. Polymers which are rubbery possess relatively weak interchain forces and may lack linear symmetry and orderly arrangement of the molecule. As stronger interchain forces are added and sy…
A modified assignment of the PMR signals in acetylacetone is confirmed. The changes in intensity of selected signals with temperature are used to calculate an enthalpy of conversion of 2700 ± 100 cal. between keto and enol forms in pure acetylacetone.Interactions, which perturb the equilibrium between the tautomeric f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSeparation of Xylenes, Cymenes, Methylnaphthalenes and Other Isomers by Clathration with Inorganic ComplexesWilliam D. Schaeffer, W. S. Dorsey, Davis A. Skinner, and C. G. ChristianCite this: J. Am. Chem. Soc. 1957, 79, 22, 5870–5876Publication Date (Print):November 1, 1957P…