Materials Literature
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Growth of various species of macro-algae and diatoms was measured in culture in a range of concentrations of germanium dioxide. Growth of Laminaria saccharina was inhibited measurably at concentrations above 0.22 mg GeO2 l−1 and very markedly inhibited above 1.1 mg GeO2 l−1. Fucus spiralis was measurably inhibited at…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMoessbauer effect and magnetic investigation of the S = 3/2 .tautm. S = 1/2 spin crossover in [Fe(salen)NO] and the S = 3/2 state in [Fe(5-salen)NO]F. V. Wells, S. W. McCann, H. H. Wickman, S. L. Kessel, D. N. Hendrickson, and R. D. FelthamCite this: Inorg. Chem. 1982, 21, 6…
Starting from a consideration of how the phonon frequency would change with the spin splitting of the conduction-electron energy bands in an itinerant-electron ferromagnet, we find that in the paramagnetic region the effect of the electron-phonon interaction makes the temperature dependence of the spin susceptibility…
ABSTRACT Reproduction in Rhoicosphenia curvata (Kütz.) Grun. is isogamous. The two auxospores formed expand parallel to the apical axes of the gametangial cells. Expansion is bipolar and leads to the formation of a slightly curved, tapering cell, in which the initial valves are laid down. The perizonium consists of tr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics of aqueous tetracyanoplatinate(2-)John W. Schindler, Robert C. Fukuda, and Arthur W. AdamsonCite this: J. Am. Chem. Soc. 1982, 104, 13, 3596–3600Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https…
This report reviews the possible effects of both radiation damage to the glass and of radiolysis of the leachant on the leaching behaviour of vitrified radioactive waste. It has been stimulated particularly by recent papers, which have suggested that the leach rates of glasses will be enhanced by large factors after a…
Abstract Die Aktivkorrosion von nichtrostendem Chrom‐Nickel‐Stahl X 5 CrNi 18 9 (Werkstoff Nr. 1.4301) in Schwefelsäure wird durch Schwefeldioxid sowie Schwefelwasserstoff stimuliert (Erweiterung des Potentialbereichs der Aktivkorrosion, Erhöhung der maximalen Korrosionsgeschwindigkeit im Aktivzustand und Erhöhung der…
Abstract The reaction of poly(vinyl alcohol) with styrylpyridinium and quinolinium salts which contain formyl group produced water‐soluble photosensitive polymers. The sensitivity was high, although the content of the styryl groups was extraordinarily low. Spectroscopical studies revealed that the high sensitivity is…
The water sorption, bound water, ionic conductivity, and chemical stability of polystyrene sulfonic acid (PSSA), polyethylenesulfonic acid (PESA), poly‐2‐acrylamido‐2‐methylpropanesulfonic acid (poly‐AMPS), and perfluorosulfonic acid (Nafion) have been determined. All the ion‐containing polymers investigated were foun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical preparation of a Prussian blue analog: iron-ruthenium cyanideKingo Itaya, Tatsuaki Ataka, and Shinobu ToshimaCite this: J. Am. Chem. Soc. 1982, 104, 13, 3751–3752Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inis…
Abstract Two random commercial ethylene‐propylene copolymers (EPM) with different ethylene content have been added to binary isotactic polypropylene (iPP)/high density polyethylene (HDPE) blends by melt mixing in a Brabender‐like apparatus. Impact Izod tests and a morphological analysis on the fractured surfaces of br…
Porphyrins appended with crown ether, benzo-15-crown-5, at the methine positions have been synthesized and \ncharacterized. The fully and partially substituted porphyrins and their metallo (Co, Cu, and Zn) derivatives describe one or more ether cavities in the periphery that are capable of recognizing spherical ca…
The filling of thin-walled glass capillaries is tedious and time consuming especially when the powder tends to agglomerate due to extremely fine grinding (<10 t~m) in a micronizing mill. While special devices have been designed for loading capillaries in a dry box (Larsen & Leddy, 1958; Lange & Haendler, 1972), a tech…
Abstract The human central nervous system pharmacology of cis -diamminedichloroplatinum (CDDP) was studied, and trials were initiated of CDDP as a radiosensitizer in the treatment of malignant primary brain tumors. Samples were assayed for platinum using X-ray-dispersive fluorescence spectrometry. Platinum was barely…
Since the serine proteases form the most thoroughly understood family of enzymes, it is of some interest to consider what the two principal physical techniques of studying enzymes, crystallography and nuclear magnetic resonance (NMR), have told us about the details of their enzymatic mechanism. Due to limitations of s…
Abstract The chemisorption of CO on Co(10&1macr;0) has been investigated by LEED, UPS, EELS, Auger and sp measurements. CO is molecularly adsorbed between 100 and 420 K. This can be deduced from UP spectra, EEL spectra and the reversibility of the sp and the LEED results. The initial isosteric heat of adsorption h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface tension of a ternary polymeric solutionJ. D. Pandey and N. PantCite this: J. Am. Chem. Soc. 1982, 104, 12, 3299–3302Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://pubs.acs.org/doi/10.1021/ja0037…
Electrode films of lanthanide diphthalocyanines undergo a series of reversible color changes that make them potentially very attractive as flat-panel color display materials. Research on these compounds has revealed a complex scheme of electrode processes that is not yet fully characterized. The solid organic phases w…
This report reviews research on plant-derived agents that prevent sperm production if taken orally by the male or that incapacitate or kill sperm on contact if used vaginally by the female. It would be of great value to develop fertility inhibitors that are totally selective for reproductive systems and enzymes, and t…
The design and operation of a focusing camera for high-resolution macromolecular crystallography with synchrotron radiation (SR) are described. The performance of this service-oriented instrument is evaluated on the basis of five years of use. Standard procedures for data collection, data processing and data reduction…