Materials Literature
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An intravenous injection of 153Gd-labeled gadolinium-DTPA or gadolinium chloride was given to 60 rats, which were killed either 15, 40, 120, 300, 900, or 3600 seconds later. Tissue concentrations of gadolinium in the blood, liver, spleen, stomach, pancreas, renal cortex, renal medulla, lungs, heart, adrenals, gluteal…
In part I of this study, extensive evidence for glide on the non-compact plane (001) was obtained in [112] aluminium single crystals under creep conditions at high temperatures. In this part II the same single crystals are used to measure the critical resolved shear stress for (001) glide as a function of strain rate…
The pH dependence of the kinetic parameters and primary deuterium isotope effects have been determined for tyrosine phenol-lyase from both Erwinia herbicola and Citrobacter freundii. The primary deuterium isotope effects indicate that proton abstraction from the 2-position of the substrate is partially rate-limiting f…
Research Article| September 01 1988 Structural studies of proteins by high-flux X-ray and neutron solution scattering S J Perkins S J Perkins Department of Biochemistry and Chemistry, Royal Free Hospital School of Medicine, Rowland Hill Street, London NW3 2PF, U.K. Search for other works by this author on: This Site P…
In a study of soils from a chronosequence in southern New Mexico, where CaCO3 accumulation is primarily derived from aeolian input, P adsorption was greatest in the most highly calcic horizons and least in horizons of clay and oxyhydroxide accumulation. Similarly, adsorption capacity was most highly correlated with Ca…
Abstract Coarse clay fractions (2–0.2 µm) of selected soil samples containing variable quantities (10–52%) of Al‐hydroxyinterlayered smectite (HISM) or vermiculite (HIV) were investigated by XRD, thermal, elemental and solution composition analyses. The HISM vs. HIV nature of the sample was determined from the smectit…
A study of the distribution of the debris formed by the XeCl laser ablation of polyimide and polyethylene terephthalate and the KrCl laser ablation of polyimide shows that it is the redeposition of debris rather than impurities which accounts for the cone structures commonly seen in the surface morphology.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and charge-transport properties of polymers derived from the oxidation of 1-hydro-1'-(6-(pyrrol-1-yl)hexyl)-4,4'-bipyridinium bis(hexafluorophosphate) and demonstration of a pH-sensitive microelectrochemical transistor derived from the redox properties of a convent…
Tweedle MF, Eaton SM, Eckelman WC, Gaughan GT, Hagan JJ, Wedeking PW, Yost FJ. Comparative chemical structure and pharmacokinetics of MRI contrast agents. Invest Radiol 1988; 23(Suppl 1):S236-S239. The blood clearance kinetics of five gadolinium complexes, Gd(L), were determined in rats and the results interpreted in…
Pharmacokinetic and acute-toxicity studies of Gd-DOTA meglumine (Mgl) were evaluated in various animals and compared with those of Gd-DTPA Mgl. The agents were injected intravenously at two dosages: 0.1 or 0.5 mmol/kg. Various organs and tissues were removed at specified times after injection and assayed for gadoliniu…
In recent years development in the field of immunologic assays has been characterized by an expanding use of monoclonal antibodies [1] and two-site ‘sandwich’ type assays [2]. Concomitantly, the assay sensitivities and specificities have improved considerably, which has opened new possibilities and areas of applicatio…
Abstract Reduction of aldehydes with 2-propanol proceeded efficiently by catalysis with hydrous zirconium oxide to give the corresponding alcohols. Most ketones also were reduced efficiently, but conjugated or sterically hindered ketones resisted the reduction. The reduction was carried out with primary, secondary, or…
The infrared and Raman spectra of trans,trans-1,3,5,7-octatetraene have been observed. It has been found that the spectral data reported in 1959 for this compound contain bands due to either impurities or geometrical isomers other than the trans,trans form. Band assignments are performed by using the results of ab ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas-phase and computational studies of pentacoordinate siliconRobert. Damrauer, Larry W. Burggraf, Larry P. Davis, and Mark S. GordonCite this: J. Am. Chem. Soc. 1988, 110, 20, 6601–6606Publication Date (Print):September 1, 1988Publication History Published online1 May 2002P…
Abstract In a continuation of our study of the molecular constitution requirements for the cocrystallization of chemically similar polymeric species, we have directed attention to both homopolymer‐copolymer mixtures and copolymer mixtures of polyethylene. Molecular weight and composition fractions were used exclusivel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical evaluation of charge-transport rates in polypyrroleReginald M. Penner, Leon S. Van Dyke, and Charles R. MartinCite this: J. Phys. Chem. 1988, 92, 18, 5274–5282Publication Date (Print):September 1, 1988Publication History Published online1 May 2002Published in…
This paper provides a mean-field description of the spin-density-wave (SDW) state of a quasi-one-dimensional (quasi-1D) conductor with an open Fermi surface, as well as of its behavior in low magnetic field. The variation of simple quantities with the degree of nesting is worked out: These quantities are the specific-…
It is shown why the epitaxial growth of high quality metallic superlattices generally requires a growth temperature approximately 3T m /8 and two components having similar melting temperatures T m . A general observation of RHEED oscillations from growing metal surfaces at temperatures approximately T m /8 is also pre…
Powder X-ray diffraction, electron diffraction and electron microscopic experiments, including high-resolution electron microscopy, have revealed that the Al─Cu─Fe icosahedral phase has a higher degree of structural perfection than other known icosahedral phases. This icosahedral phase exhibits clear equal thickness f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and magnetic properties of .mu.-2,2'-bipyrimidine-N,N',N'',N'''-copper(II) complexesMiguel Julve, Giovanni De Munno, Giuseppe Bruno, and Michel VerdaguerCite this: Inorg. Chem. 1988, 27, 18, 3160–3165Publication Date (Print):September 1, 1988Publication…