THE ANALYSIS OF YARN IRREGULARITY
(1951). THE ANALYSIS OF YARN IRREGULARITY. Journal of the Textile Institute Proceedings: Vol. 42, No. 3, pp. P107-P113.
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Ceramic Compositions Having Negative Linear Thermal Expansion
Compositions having negative linear thermal expansions ranging from 0 to –0.38% have been obtained in two areas of the system lithia‐alumina‐silica. Petrographic and X‐ray examinations indicate the presence of three principal crystalline phases, each of which is a solid solution: β ‐eucryptite, β ‐spodumene, and an un…
The Diamagnetic Anisotropy of Large Aromatic Systems Parts I and II
Part I. A short discussion is given of the magnetic properties of large aromatic hydrocarbons and of the applicability of various wave-mechanical methods of calculating the diamagnetic susceptibility. The ultimate particles of most cokes and carbon blacks are not sufficiently large to be regarded as crystalline and mu…
The Nuclear Surface Energy
The kinetic and potential parts of the nuclear surface energy are calculated on the basis of the statistical model of the nucleus taken to first order and using a gaussian interaction between particles. The resulting surface energy is found to be of the right order of magnitude, the calculated figure being in fact 55%…
Compressibility of natural and synthetic high polymers at high pressures
Co mpressio n da ta (t. V IVo) are repor ted between 1,000 a nd 10,000 atmos pheres for the foll owing materi a ls : dry cellulose, polyvinylidene chloride (Saran), polyeth ylene, polyrn onochlorotrifluoroeth ylene (K el-F) , polytetrafluoro ethy le ne (T efion ), a polyester (Seleetron 5003), and raw r ubbers, H ycar…
Long-Range Order in Beta-Brass and Cu3Au
Measurements have been made on single crystals of CuZn and Cu3Au held at various temperatures below Tc to decide whether there is a single-ordered phase whose order changes with temperature, or whether there is an ordered and a disordered phase the relative amounts changing with temperature. Precision measurements wer…
THE COMPOSITIONAL HETEROGENEITY OF BUTADIENE-STYRENE COPOLYMERS SYNTHESIZED AT −18°C. IN EMULSION
A study has been made of butadiene-styrene copolymers formed at −18°C. From analyses for bound styrene in the product for various conversions and initial butadiene-styrene ratios the reactivity ratios were calculated to be r 1 = 1.37 and r 2 = 0.38 compared with 1.8 and 0.6 at 45°C. Q and e for butadiene were 1.38 and…
The Structure and Mechanical Behavior of Cellulose Fibers
The present reticular concept of the internal structure of cellulose gels is inadequate from several points of view. Principally, it fails to take sufficient account of purely energetic effects in the mechanical behavior of the gels, and is based primarily upon entropy changes. Further more, the marked influence of de…
Formation of metallic hydrides and nitrides and their significance in the synthesis of ammonia
Abstract Adsorption of nitrogen and hydrogen on lithium was investigated and the activation energy for nitrogen found to be 47 kg.‐cal./g.‐mol. The addition of other metals promoted adsorption, cerium being found the most effective. The rates of formation of calcium hydride and calcium nitride from the gases and the m…
The Design of Reflecting Microscope Objectives
The general theory is developed and the exact solutions obtained for the design of reflecting microscope objectives having two or three concentric spherical surfaces. It is shown that the only serious optical defect of reflecting objectives, low contrast due to the high obstruction ratio, can be satisfactorily control…
STUDIES ON THE GLUCOSE DEHYDROGENASE OF ASPERGILLUS ORYZAE
YASUYUKI OGURA; STUDIES ON THE GLUCOSE DEHYDROGENASE OF ASPERGILLUS ORYZAE, The Journal of Biochemistry, Volume 38, Issue 1, 1 March 1951, Pages 75–84, https://
Researches on Dichroism of Planar Complexes. III. The Color and the Structure of the Crystals of Tetracyanoplatinates (II)
Abstract The dichroism of crystals of BaPt(CN)4·4H2O, CaPt(CN)4·5H2O and MgPt(CN)4·7H2O has been measured in the visible and the near-ultraviolet region, and with the aid of results of this measurement, the state of the complex ions in the crystals has been, discussed in relation to their crystal structures. These cry…
Thermal Radiation Characteristics of Some Glasses
The emissivity, reflectivity, and transmissivity have been studied for a number of glasses throughout the wave‐length region 2.2 to μ , and through a temperature range of 500° to 1500°F. In general it is found that, although the spectral emissivity varies considerably with wave length throughout the opaque portion of…
Aliphatic Acid Esters of Cellulose. Properties
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAliphatic Acid Esters of Cellulose. PropertiesC. J. Maim, J. W. Mench, D. L. Kendall, and G. D. HiattCite this: Ind. Eng. Chem. 1951, 43, 3, 688–691Publication Date (Print):March 1, 1951Publication History Published online1 May 2002Published inissue 1 March 1951https://pubs.…
Experiments on the Reduction of the Crystallinity of Cotton Cellulose.
ADVERTISEMENT RETURN TO ISSUEArticleNEXTExperiments on the Reduction of the Crystallinity of Cotton Cellulose.Leon Segal, Mary L. Nelson, and Carl M. ConradCite this: J. Phys. Chem. 1951, 55, 3, 325–336Publication Date (Print):March 1, 1951Publication History Published online1 May 2002Published inissue 1 March 1951htt…
Low Temperature Heat Capacities of Inorganic Solids.1 V. The Heat Capacity of Pure Elementary Boron in Both Amorphous and Crystalline Conditions between 13 and 305°K. Some Free Energies of Formation
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow Temperature Heat Capacities of Inorganic Solids.1 V. The Heat Capacity of Pure Elementary Boron in Both Amorphous and Crystalline Conditions between 13 and 305°K. Some Free Energies of FormationHerrick L. Johnston, Herbert N. Hersh, and Eugene C. KerrCite this: J. Am. Ch…
Polarizabilities of Ions in Perovskite-Type Crystals
Each type of ion is shown to have very nearly the same polarizability in different crystals of the perovskite type as well as in the diagonal cubic types reported previously. This conclusion is based on dielectric constant data for several titanates and zirconates and KMg${\mathrm{F}}_{3}$. The values of ionic polariz…
The Jacobson Radical of a Semiring
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Aliphatic Acid Esters of Cellulose. Preparation by Acid-Chloride-Pyridine Procedure
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAliphatic Acid Esters of Cellulose. Preparation by Acid-Chloride-Pyridine ProcedureC. J. Maim, J. W. Mench, D. L. Kendall, and G. D. HiattCite this: Ind. Eng. Chem. 1951, 43, 3, 684–688Publication Date (Print):March 1, 1951Publication History Published online1 May 2002Publis…
On the X-Ray Absorption Correction for Encased Diffracters in the Debye-Scherrer Technique
In dealing with numerical values for relative intensities derived from the Debye-Scherrer technique, the alteration of diffracted intensities produced by absorption in the sample cannot be ignored. Claassen has shown how this effect can be allowed for in the case of homogeneous cylindrical samples. This paper deals wi…