Materials Literature
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The lysine-induced glutarate semialdehyde dehydrogenase of Pseudomonas was purified to electrophoretic homogeneity from a mutant strain lacking delta-aminovalerate transaminase. The properties of the enzyme, including molecular weight, amino acid composition, electrophoretic behavior, and kinetic features, distinguish…
Abstract Ba 2 Ti 6 O 13 = 2 BaO · Ti 2 O 3 · 4 TiO 2 wurde in einkristalliner Form im Niederdruckplasmabrenner unter H 2 ‐Atmosphäre dargestellt. Es kristallisiert monoklin (Raumgruppe C —C2/m, a = 1 500,4, b = 395,3, c = 908,5 pm; β = 98,01°) und ist mit Na 2 Ti 6 O 13 isotyp.
Direct TEM studies on the epitaxial growth of (111) Cu2O on (111) Cu have been made. Flat monocrystalline (111) Cu substrates, approximately 1300 Å thick, were formed and annealed in-situ in a U.H.V.-RHEED system on (111) NaCl/mica bilayers using previously published techniques. These Cu films were oxidized at 350°C u…
Abstract An investigation on corrosion of copper exposed to natural soft water with and without humic substances and at different temperatures and carbon dioxide levels is performed. The corrosion rate increases with the carbon dioxide content and is higher in water containing humic matter. For water which does not co…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric relaxation and nuclear magnetic resonance studies of two clathrate hydrates of dimethyl etherS. R. Gough, S. K. Garg, J. A. Ripmeester, and D. W. DavidsonCite this: J. Phys. Chem. 1977, 81, 23, 2158–2163Publication Date (Print):November 1, 1977Publication History…
Operating plant radiation level measurements are important in optimizing the operation of nuclear plant systems and in confirming methods and assumptions used by shield designers and must be evaluated to aid in improving future plant designs. In addition, the anticipated long-term radiation fields to which reactor com…
Measured data are presented on glass transition temperature, thermal expansion coefficient, and refractive index for glasses in the Ge-As-Se system. The range of reciprocal dispersive power between 8 microm and 12 microm of 110-159 for these glasses is discussed in relation to their basic physical properties, and it i…
The rate of the reaction CS+O→CO+S was investigated from 150 to 300 K using a flow-tube technique. The rate was determined both by monitoring the CO formation rate in the presence of excess CS and by measuring the CS reaction rate in the presence of excess O. The reaction S+O2→SO+O could interfere with the first metho…
Abstract Three soil series; Shahdara (Ustifluent), Sultanpur, (Ustochrept) and Bhalwal (Haplustalf), representing a chronosequence from the Punjab River plains of Pakistan, were studied with respect to morphological, chemical, physical, and mineralogical properties. These soils, developed in mixed mineral alluvium, re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImpurity Trapping during Dendritic Crystal Growth. 2. Experimental Results and CorrelationAllan S. Myerson and Donald J. KirwanCite this: Ind. Eng. Chem. Fundamen. 1977, 16, 4, 420–425Publication Date (Print):November 1, 1977Publication History Published online1 May 2002Publ…
Pb(N3) 2, orthorhombic, Pnma; a = 6.63, b = 16.25, c = 11.31 A, Z = 12 [Azaroff (1956), Z. Kristallogr. 107, 362-3691. The four independent azide groups in the structure are all asymmetric, with N N bond distances, corrected by the riding model, ranging from 1-164 to 1.196 A, and N N N bond angles as small as 177.9 °…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImpurity Trapping during Dendritic Crystal Growth. 1. Computer SimulationAllan S. Myerson and Donald J. KirwanCite this: Ind. Eng. Chem. Fundamen. 1977, 16, 4, 414–420Publication Date (Print):November 1, 1977Publication History Published online1 May 2002Published inissue 1 N…
Specimens of gold black (a test solar black system) were produced under controlled laboratory conditions so as to study the dependence of their optical properties on the particlelike nature of the material. A theoretical model incorporating the particulate nature of the gold black films has been applied to describe th…
The sorption of vinyl chloride monomer (VCM) vapor by poly(vinyl chloride) (PVC) resin powders has been studied as a function of time, VCM pressure, temperature, and previous PVC history. In fine powders, sorption occurs in two separable stages, a rapid Fickean diffusion and a slow relaxation-controlled process. Hyste…
Abstract Die Struktur von Kristallen der Zusammensetzung Se 2,9 S 5,1 , Se 3,3 S 4,7 und Se 4,7 S 3,3 wurde röntgengraphisch untersucht. Die beiden ersten Substanzen kristallisieren im Typ des γ‐Schwefels, die dritte im α‐Selentyp. Alle drei untersuchten Substanzen sind Mischkristalle aus einer Reihe von Einezlkompone…
The quenchable high pressure phases of TlAlSe 2 and TlGaSe 2 are isotypic with TISe.
Theoretical calculations predict that under certain special conditions a shallow fine pitch diffraction grating, given a precise dielectric overcoating, acts as a complete absorber of incident light of a specific wavelength and polarized in the P plane. Despite lack of a physical explanation, the phenomenon was confir…
Two Type 304 stainless steels, one boron free and the other containing 4 ppm boron were investigated. Both steels were subjected to an identical series of corrosion tests and the results compared with one another. It was found (1) Boron had no detrimental effect on the potentiostatic characteristics, intergranular cor…
Photoelectron spectra of the monomeric species of several classes of ionic molecule have been obtained by crossing a molecular beam of the material with a photon beam containing photons of energies up to 50 eV (He I and He II lines). In this way electrons from the s 2 , p 6 and d 10 shells of the relevant atoms (or io…
Tryptophanase from Escherichia coli B/1t7-A is inactivated by the arginine-specific reagent, phenylglyoxal, in potassium phosphate buffer at pH 7.8 AND 25 degrees. Apo- and holoenzyme are inactivated at the same rate, and inactivation of both is correlated with modification of 2 arginine residues/tryptophanase monomer…