Materials Literature
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Abstract The level of adsorption of enantiomeric tris(2,2′-bipyridyl)ruthenium(II) (Ru(bpy) 3 2+ ) by seven different smectite samples was found to be controlled by the total surface area of the clay. The level corresponded to one monolayer. The adsorption of the racemic mixture was lower for all samples, being limite…
The diamond film polishing apparatus with hot metals has been presented . Diamond films deposited by both microwave plasma CVD and arc discharge plasma jet CVD are used as workpieces . As a diamond film sways on a polishing plate made of an iron or a nickel heated to 75O''95O C it is finished to flat and glass-like su…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and x-ray crystal structure determination of a novel chiral heteropolyanion: the "3:1" octadecatungstohexaphosphateRafael Acerete, Juan Server-Carrio, Angel Vegas, and Martin Martinez-RipollCite this: J. Am. Chem. Soc. 1990, 112, 25, 9386–9387Publication Date (Prin…
The feasibility of photoelectron Auger electron coincidence spectroscopy from solid surfaces has been demonstrated by Haak et al. [Ph. D. thesis, University of Groningen, The Netherlands, 1983; Phys. Rev. Lett. 41, 1825 (1978); Rev. Sci. Instrum. 55, 696 (1984)]. They were able to show the considerable power of the te…
A simple theory of potential and current distributions developed elsewhere, based on the parallel‐plate electrochemical cell under linear kinetics, is applied to electrochromic windows. In our case, only the working electrode has appreciable resistance. The model permits a predictive analysis of the effects of operati…
Etude de la coordination autour du cation Ca pour 254 composes mineraux, contenant au total 368 polyedres, en effectuant une selection sur la base de la precision des donnees structurales. Analyse statistique en fonction des variables liees aux distances Co-O et en fonction du volume du polyedre concerne. Proposition…
The substrate binding sites of adenylate kinase (AK) proposed by X-ray crystallographic studies [Pai, E. F., Sachsenheimer, W., Schirmer, R. H., & Schulz, G. E. (1977) J. Mol. Biol. 114, 37-45, and subsequent revisions] were evaluated by site-specific mutagenesis in conjunction with structural analysis by NMR. The res…
The activities of prolyl 4-hydroxylase (PH) and galactosylhydroxylysyl glucosyltransferase (GGT), both enzymes of collagen biosynthesis, and the concentration of hydroxyproline (Hyp) were measured in soleus and tibialis anterior muscle after periods of 0, 7 and 21 days of immobilization following a swimming training f…
Abstract Novel linear and three‐arm star radial thermoplastic elastomers (TPE) comprising rubbery polyisobutylene (PIB) center blocks connected to glassy poly( p ‐chlorostyrene) (PpClSt) outer blocks have been synthesized by sequential monomer addition. For triblock polymer synthesis isobutylene (IB) was added continu…
Granular material perceived as a collection of particles is modeled as a macrocontinuum. The model takes into account the effects of microdiscreteness and the interparticle contact properties in the system. With consideration of particle rotation, the continuum model for granular solid is found to be of micropolar typ…
A small fraction of relatively insoluble gas effectively inhibits rapid coarsening of a liquid/gas foam. This effect, which is of particular practical importance in the brewing industry, is explained and simulated. Below a certain critical concentration of the insoluble gas, an inhomogeneous structure is formed. The c…
High-voltage Schottky diodes have been fabricated on diamond epitaxial films with the structure: metal/undoped diamond/p + -type diamond. The films were epitaxially grown on synthesized single-crystal diamonds (100) by microwave plasma-assisted chemical vapor deposition (CVD) using H 2 and CH 4 . B 2 H 6 was used at B…
The phosphorylation and activation of tyrosine hydroxylase was examined in PC12 cells following depolarization with KCl or treatment with nerve growth factor. Both treatments activate tyrosine hydroxylase (TH) and increase enzyme phosphorylation. Site-specific analysis of the tryptic phosphopeptides of TH isolated fro…
Abstract A series of polyamide‐azomethine‐ethers was prepared by condensation of 4,4′‐diaminoanilide with 4,4′‐diformyl‐α,ω‐diphenoxyalkane, 4,4′‐diformyl‐3,3′‐methoxy‐α,ω‐diphenoxyalkane, and 4,4′‐diformyl‐3,3′‐ethoxy‐α,ω‐diphenoxyalkane, respectively. The inherent viscosities of polymers were obviously increased whe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVersatile methods for the synthesis of differentially functionalized pentaerythritol amine derivativesT. Jeffrey Dunn, William L. Neumann, Milorad M. Rogic, and Steven R. WoulfeCite this: J. Org. Chem. 1990, 55, 26, 6368–6373Publication Date (Print):December 1, 1990Publicati…
The evaporative decomposition of solutions method was used to form V 2 O 5 . Spraying above the congruent melting temperature of V 2 O 5 (690°C) resulted in dense spherical particles with a smooth surface. Spraying below the V 2 O 5 melting temperature yielded porous V 2 O 5 powder with a rough surface. Reduction of t…
Four new series of biforked mesogens derived from 3,4-dialkoxybenzoic acids or 3,4-dialkoxybenzaldehydes have been prepared and studied. These derivatives exhibit an interesting polymorphism in which both columnar and lamellar mesophases exist in the same series and in some cases in the same compound. The short chain…
Time‐dependent deformation behavior induced by an indentation, called indentation creep, was investigated for Na 2 O · 3SiO 2 glasses with various water contents by measuring the indentation depth as a function of time using a conical indenter. It was found that the indentation creep behavior of the glasses could be b…
ADVERTISEMENT RETURN TO ISSUEPREVArticlePerfluoroalkylene-activated poly(aryl ether) synthesisJeff W. Labadie and James L. HedrickCite this: Macromolecules 1990, 23, 26, 5371–5373Publication Date (Print):December 1, 1990Publication History Published online1 May 2002Published inissue 1 December 1990https://pubs.acs.org…
Monazite‐type CePO 4 powder (average grain size 0.3 μm) was dry‐pressed to disks or bars. The green compacts began to sinter above 950°C. Relative density ≧ 99% and apparent porosity <1% were achieved when the specimens were sintered at 1500°C for 1 h in air. The linear thermal expansion coefficient and thermal con…