Materials Literature
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1. Substrate analogue CoA derivatives were applied as inhibitors of citrate synthase. Substitution of the acyl-CoA oxygen next to sulfur by hydrogen was without marked influence on the affinity. 2. Carboxymethyl-CoA, a structural analogue of enolic acetyl-CoA, was characterized as a transition state analogue by an aff…
Abstract The solubilities of six phenolic antioxidants in polypropylene and polyethylene were measured between 50°C and 100°C. Measurements were also made of their solubilities in a range of liquid alkanes. The measured solubilities at 70°C were consistent with regular solution theory and could be used to predict valu…
The influence of dislocation structures on the motion of magnetic domain walls (DW) was investigated in high-purity polycrystalline iron by measuring the magnetomechanical damping and the magnetic properties (coercive field and parameters of the Rayleigh law). The dislocation structures created by strain-hardening wer…
Crack‐growth studies were conducted on soda‐lime‐silica, soda borosilicate, and two binary soda‐silica glasses immersed in solutions of 1 M Li + , 1 M Cs + , or deionized water at different pH values. A definite effect of the Li + and Cs + was observed on the V‐K 1 curves in all but the soda‐lime glass. A plateau in c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, characterization, and crystal, molecular, and electronic structure of (H2EDTA)99TcIV(.mu.-O)299TcIV(H2EDTA).cntdot.5H2O. A 2.33-.ANG. Tc-Tc distance which may represent a .sigma.2.pi.2.delta.*2 bondH. B. Buergi, G. Anderegg, and P. BlaeuensteinCite this: Inorg.…
Abstract Thermodynamics of potassium (K) exchange using a kinetics approach was investigated in Ca‐saturated samples from the Ap and B21t horizons of a Matapeake soil from Delaware. Kinetics of adsorption and desorption were determined at temperatures of 0, 25, and 40°C on each soil horizon using a miscible displaceme…
The effects of electron beams on the composition of ion bombarded calcium fluoride surfaces have been studied with Auger electron spectroscopy (AES), electron loss spectroscopy (ELS), and x-ray photoelectron spectroscopy (XPS). It was found with AES that when using typical AES excitation electron-beam parameters (5 ke…
A theory of angle-resolved photoemission from the surface of a random alloy is described. It is argued that this theory contains a proper treatment of the disorder (via the Korringa-Kohn-Rostoker coherent potential approximation, KKR CPA), the surface, the LEED-type final state, and the electron-photon matrix elements…
We report a high-resolution heat-capacity and x-ray study of the nematic---smectic-$A$ transition in the single-layer smectic material butyloxybenzylidene octylaniline (40.8). We find that the transition is second order to within 3 mK, with critical behavior closely similar to that observed previously in bilayer smect…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of metallo and metal-free octaalkylphthalocyanines and uranyl decaalkylsuperphthalocyaninatesEdward A. Cuellar and Tobin J. MarksCite this: Inorg. Chem. 1981, 20, 11, 3766–3770Publication Date (Print):November 1, 1981Publication History Publish…
The microstructural influence on the PTCR effect in semiconducting barium titanate ceramics was studied and a method for preparing the ceramic bodies exhibiting a PTCR effect of more than seven orders of magnitude was established. Commercial barium titanyl oxalate was used as a starting material and Sb 2 O 3 was added…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectroreductive alkylation of iron in porphyrin complexes. Electrochemical and spectral characteristics of .sigma.-alkylironporphyrinsDoris Lexa, Joel Mispelter, and Jean Michel SaveantCite this: J. Am. Chem. Soc. 1981, 103, 23, 6806–6812Publication Date (Print):November 1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility of the poly(hydroxy ether) of bisphenol A with water-soluble polyethersL. M. Robeson, W. F. Hale, and C. N. MerriamCite this: Macromolecules 1981, 14, 6, 1644–1650Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular vibrational energy redistributionPaul R. Stannard and William M. GelbartCite this: J. Phys. Chem. 1981, 85, 24, 3592–3599Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published inissue 1 November 1981https://pubs.acs.or…
J C H Spence 1981 Clarendon Press: Oxford University Press x + 370 pp price £35 The author has provided us with an excellent and readable review of the fundamental principles of high resolution electron microscopy. He has, however, managed to combine his theoretical treatment with a discussion of the pitfalls for the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharge-transfer spectra of metallophthalocyanines: correlation with electrode potentialsA. B. P. Lever, S. R. Pickens, P. C. Minor, S. Licoccia, B. S. Ramaswamy, and K. MagnellCite this: J. Am. Chem. Soc. 1981, 103, 23, 6800–6806Publication Date (Print):November 1, 1981Publi…
The visible and near infrared luminescence spectra of MoCl6 3- in Cs2NaMCl6 (M=Sc, Y, In) and MoBr6 3- in Cs2NaYBr6 have been measured between 15 000 cm-1 and 3000 cm-1 at liquid helium temperatures. Comparison with new electronic absorption, infrared and Raman spectra have enabled five luminescence transitions betwee…
The effects of surface insulating coatings on magnetic properties in commercial highly grain oriented Si-Fe sheets are shown on the basis of domain observation using a high voltage SEM. The average 180° wall spacing in grain oriented Si-Fe sheets with the coatings could be expressed semiempirically as a function of ti…
Abstract By 1 H‐NMR spin‐echo spectroscopy the self‐diffusion coefficients D te of almost spherical test molecules—Sn(CH 3 ) 4 , Si(OCH 3 ) 4 , Ti(O t Bu) 4 , and SnOct 4 —in the solvents—CCl 4 , Si(OCD 3 ) 4 , and Si(O 1 Pr) 4 ‐d 28 —were studied as a function of temperature and concentration.—The excess volumes of t…
Electrical conductivity and thermoelectric power measurements on pure and Li‐substituted Co 3 O 4 were performed at 200° to 900°C. Impurity‐induced p‐type semiconduction was observed at low temperatures and intrinsic behavior at high temperatures. A hopping scheme for electron hole conduction was confirmed, and site e…