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Much available chemical evidence supports the hypothesis that covalent cross-linking is the best way to improve the resilience of cellulosic fabrics. This paper reviews the theories relating physical properties to cross-linking in rubbery polymers and shows that they apply in some qualitative aspects to cellulose. Par…
The crystal structure of Na 2 504 .10H 200, has been determined to explain the entropy which remains at low temperatures.This substance is monoclinic, space group P2 1 /c, with a =I.1.51 A. , b 10. 38 A. , c 12. 83 A,, each 0.01 A., 3 = 107 0 4511± 10 1 , Z = 4.The corresponding compounds with S replaced by Cr, Se, Mo…
The prisms in the shell of Mytilus edulis Linné are calcite needles. Their small size and their thin conchiolin cases distinguish them from the prisms of many other species of mollusks. These Mytilus prisms have been studied with the electron microscope. The material consisted of positive replicas of surfaces of the p…
The above title was used (Luder and Sheldon, 1955) to describe a family in which a renal tubular reabsorption defect involving glucose and amino acids appeared in three successive generations (female twins then aged 5, their father and his father). The purpose of this communication is to correct the impression given i…
A new type of dislocation motion, called 'conservative climb', has been observed in zinc platelets deformed in tension inside an electron microscope. Circular, prismatic dislocation loops are often forced to climb out of their glide cylinders by their repulsive interaction with edge dislocations. It is observed that t…
Experimental evidence is presented for the proportionality between secondary electron yield and the energy dissipated by electrons near the surface of a solid. Using measurements of the energy carried away by electrons transmitted and reflected from thin foils of aluminum and carbon, the energy dissipated in an increm…
It is shown experimentally that backscattered electrons emitted from solids under electron bombardment contribute significantly to the observed secondary yield, even for the case of low backscattering coefficients. Thus, it was found that in Al with a backscattering coefficient of only 0.14, about 40% of all secondari…
The enthalpies of mixing in binary liquid alkali nitrate systems have been measured, and are all negative. It is found that the magnitude of the molar mixing enthalpy (ΔHM) increases in a regular fashion with increasing difference in size between the two participating cations, according to the following approximate re…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation E. C. Subbarao; Ferroelectricity in Mixed Bismuth Oxides with Layer‐Type Structure. J. Chem. Phys…
The pulse-height distribution at the output of an electron multiplier structure for a single electron input has been calculated assuming a Poisson distribution at each stage. Graphs are given which illustrate the change in pulse-height distribution as a function of the number of stages. This has been done for intersta…
Abstract In this paper, the author proposed a classified table of metals contained in silicate minerals, and the qualitative and conventional rules in which it appeared possible to predict the reactivity of all the known silicate minerals toward ordinary mineral acids. In the classification and rules, ionic potential,…
The vapor pressure of silicon and the dissociation pressure of silicon carbide have been obtained from total weight loss experiments with Knudsen effusion cells. Combination of the measured data with known entropies yields at 298°K for the heat of sublimation of silicon to silicon atoms 108.4±3 kcal and for the heat o…
The positions of the oxygen ions of tetragonal Mn 3 O 4 are determined through the Debey-Scherrer X-ray analysis, by the extension of the Bertaut's method and with least square method. The assigned correction for the anomalous scattering on Mn to Fe–Kα radiation is somewhat larger than the calculated value. The two ox…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHEAT CAPACITIES AND CHEMICAL THERMODYNAMICS OF CERIUM(III) FLUORIDE AND OF CERIUM(IV) OXIDE FROM 5 TO 300°K.1Edgar F. Westrum Jr. and Alvin F. Beale Jr.Cite this: J. Phys. Chem. 1961, 65, 2, 353–355Publication Date (Print):February 1, 1961Publication History Published online…
Abstract Vermiculite occurrences can be divided into two major categories, those having macro-scopic and those having microscopic or clay vermiculite. This paper is concerned with the former. The macroscopic type of vermiculite deposits can be subdivided into four categories based on the host rock: (1) ultramafic and…
Abstract Complexes have been formed by mixing urea or thiourea with high molecular weight yoly(ethylene oxide) on a hot roll mill and by precipitation of the complex from benzene solution. The most dramatic method of complex formation, however, is observed when finely divided urea or thiourea is suspended in a benzene…
In this part, two alternative methods for measuring shear properties of fabrics are described. One method is recording and consistsof an attachment to the Instron Tensile Tester. Complete load-deformation curves are obtained. The stress distribution in a fabric sample subjected to shear is analyzed and the results use…
Creep of vacuum annealed polycrystalline 65/36 alpha-brass was studied at constant stress in the range 77–30°k, close to the yield point, at elongations not exceeding 3%. The tensile strain σ increased logarithmically with time, and the characteristic strain 8cr ≡ de/d log10 t, given by the slope of the creep curves i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal Carbonyls. I. Carbon Monoxide Exchange with Nickel Tetracarbonyl and Dicobalt Octacarbonyl1,2Fred Basolo and Andrew WojcickiCite this: J. Am. Chem. Soc. 1961, 83, 3, 520–525Publication Date (Print):February 1, 1961Publication History Published online1 May 2002Published…
The anomalous resistivity‐temperature characteristics found in semiconducting barium titanates were studied in relation to their composition. The resistivity and impedance characteristics and the crystal structures were investigated for different compositions in the systems (Ba, ‐Sr) (Ti, Sn)O 3 , (Ba, Ca, Sr)TiO 3 )…