Materials Literature
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Abstract Methods are described for estimating a valuable absorption coefficient for OH stretching bands of micas: the integrated parallel absorption coefficient K . From a correlation between this coefficient and the OH content of biotites and phlogopites, it was found that the parallel absorption coefficient per hydr…
Abstract The refractive index, density and viscosity of aqueous solutions of ammonium sulphate have been measured in the range 20‐30°. The solubility of ammonium sulphate was checked over the range 20‐45° by measuring saturation temperatures in a simple apparatus. The same technique was also used for nucleation studie…
The various methods of interpreting and using Kossel patterns to determine orientations and lattice constants are reviewed. Particular attention is given to the fully analytic methods for which computer programs can be written to perform the calculations. Some practical data and computation methods are appended.
Abstract A statistical analysis of dilute solution viscosity data for a wide range of polyethylene and polypropylene samples in Decalin at 135°C has shown that the Martin equation fits the experimental data better than the Huggins equation at higher values of [η] c . A grand average k of 0.139 is applicable to both po…
Investigations of the formation and magnetic properties of MnδCo1-δFe2O4formed in alkaline aqueous solution by the coprecipitation method are covered. The lattice constant of these ferrites apparently reduced with decreasing average particle size below about 500 Å. The coercive force ratio of MnFe2O4and Co-Fe2O4is 1 t…
The normal modes of an incompressible cholesteric liquid crystal are determined from the hydrodynamical equations. There are two important modes which should be readily observable by light scattering. The first mode is a twisting and untwisting of the helical structure. The second mode is a combination viscous-splay m…
Strain-gauge thermal expansion and anisotropy of susceptibility measurements indicate the existence of three phase transitions below 50°K in alpha uranium. Two of the transitions are of first order and one is of second order.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSorption of aqueous and nonaqueous media by wood and celluloseAnanthakrishnaiyer. VenkateswaranCite this: Chem. Rev. 1970, 70, 6, 619–637Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 December 1970https://pubs.acs.o…
The stress in thin films of chemical-vapor-deposited (CVD) glass on Si substrates was measured by the Newton-ring method. The CVD films studied were Silane-oxidized SiO2, phosphosilicate glass and borosilicate glass deposited at 400°–450°C. Stress reduction due to moisture absorption was observed in the CVD films, but…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduction of complexes of pentaammineruthenium(III) with pyridine derivativesHenry Taube and R. G. GaunderCite this: Inorg. Chem. 1970, 9, 12, 2627–2639Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 December 1970htt…
A unique low energy (0–50 keV) electron accelerator has been developed which provides a broad, parallel, low intensity electron beam with excellent long term stability. The beam intensity is approximately 106 electrons·cm−2 ·sec−1 and the long term stability is better than 2%/day. A prototype of this accelerator is de…
Summary. Precipitation of calcium carbonate by marine isolates from Bahamian sediments was studied in several media and under different experimental conditions. Almost all cultures brought about precipitation of aragonite crystals. The role of bacteria in the precipitation of CaCO 3 in the marine environment is discus…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudy of adsorption on single crystals by internal reflectance spectroscopyGary L. Haller and Richard W. RiceCite this: J. Phys. Chem. 1970, 74, 25, 4386–4393Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 December 1…
Abram A. Steiner, Helen van Winden; Recipe for Ferric Salts of Ethylenediaminetetraacetic Acid, Plant Physiology, Volume 46, Issue 6, 1 December 1970, Page
Oxygen ion vacancies, which absorb light at 250 nm, are observed in 'pure' mgo after irradiation with 0.23-29 mev electrons. The threshold energy for anion vacancy formation is observed to occur at 0.33 mev; this corresponds to a displacement energy t d =60 ev. Energy independent damage is observed below the threshold…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and some properties of yttrium and lanthanide isopropoxidesKhodabakhsh S. Mazdiyasni and Lawrence Milton BrownCite this: Inorg. Chem. 1970, 9, 12, 2783–2786Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 De…
Abstract The adsorption of CO on a clean Pd(lll) surface has been studied by means of low energy electron diffraction (LEED), contact potential measurements and flash desorption. At coverages ㊀ between 1/3 and 1/2 ordered adsorption phases are observed for which structure models are derived. The maximum increase of th…
Orthologs and paralogs are two fundamentally different types of homologous genes that evolved, respectively, by vertical descent from a single ancestral gene and by duplication. Orthology and paralogy are key concepts of evolutionary genomics. A ...Read More
SUMMARY Apparent K m values for nitrite reductase, glutamic dehydrogenase, and nitrate reductase are of the order 10 −4 molar for nitrite, ammonia, and nitrate, respectively while half‐saturation constants for the corresponding uptake mechanisms approximate 10 −6 molar. Ammonium and nitrate are accumulated in the vacu…
Article Refinement of the nepheline structure at several temperatures was published on December 1, 1970 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 132, issue 1-6).