Materials Literature
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We have studied the susceptibility of fibrils formed from fetal bovine skin type III collagen to proteolytic enzymes known to cleave within the helical portion of the molecule (vertebrate and microbial collagenase, polymorphonuclear elastase, trypsin, thermolysin) and to two general proteases of broad specificity (pla…
The theory of small-angle neutron or X-ray scattering from a solution consisting of rods that are uncorrelated in position and orientation and its use in determining the mass per unit length and cross-sectional radius of gyration is extended to rods of finite length and non-uniform cross-sectional structure. The case…
Pyrophosphate, citrate and magnesium, inhibitors of hydroxyapatite crystal growth, were studied using a seeded crystal growth system of constant composition at pH 5.80, 6.60 and 7.40. With this technique, crystal growth was studied at constant supersaturation at different pH values without the induction of other calci…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEdge-sharing bioctahedral dimolybdenum(III) molecules with .mu.-RS groups. Direct experimental evidence for spin-state equilibriaF. Albert Cotton, Michael P. Diebold, Charles . O'Connor, and Gregory L. PowellCite this: J. Am. Chem. Soc. 1985, 107, 25, 7438–7445Publication Da…
ADVERTISEMENT RETURN TO ISSUEPREVArticleCopolymer/copolymer blends: effect of sequence distribution on miscibilityAnna C. Balazs, Frank E. Karasz, William J. MacKnight, Hiroyoshi Ueda, and Isaac C. SanchezCite this: Macromolecules 1985, 18, 12, 2784–2786Publication Date (Print):December 1, 1985Publication History Publ…
Abstract Dextran was activated by reaction with 4‐nitrophenyl chloroformate. Analysis of the total carbonate content and the content of 4‐nitrophenyl carbonate moieties during the course of the reaction demonstrate the formation of different types of carbonate moieties. The 4‐nitrophenyl carbonate moieties are transfo…
Abstract The internal fabric of glauconite pellets has been studied by high-resolution transmission electron microscopy (HRTEM) for a better understanding of the glauconitization process. Typical “lamellae” which make up the glauconite pellets showed a spindle-like arrangement of layered crystallite packets. Three mai…
Carla M. Arundel, Arvin S. Glicksman, John T. Leith, Enhancement of Radiation Injury in Human Colon Tumor Cells by the Maturational Agent Sodium Butyrate (NaB), Radiation Research, Vol. 104, No. 3 (Dec., 1985), pp. 443-448
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and structure of manganese molybdatesA. Clearfield, A. Moini, and P. R. RudolfCite this: Inorg. Chem. 1985, 24, 26, 4606–4609Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985https://pubs.acs.o…
Abstract Kinetic factors as well as physical parameters such as volatility are often considered in explaining the different antioxidant efficiencies of monophenols and polyphenols. The objective of this work is to examine these factors in comparing the behavior of different sterically hindered phenols in processing st…
Phase changes on the surface resulting from low‐temperature annealing of yttria‐doped tetragonal ZrO 2 polycrystals under controlled humidity conditions were investigated at 0.1 to 7350 Pa of water vapor pressure and 100° to 600°C for 1 to 50 h. The tetragonal‐to‐monoclinic phase transformation was greatly accelerated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation and thermal reactions of rhodium-carbon bonds derived from the reactions of octaethylporphyrin-rhodium(III) dimer with alkyl carbon-hydrogen bonds in alkyl aromaticsKenneth J. Del Rossi and Bradford B. WaylandCite this: J. Am. Chem. Soc. 1985, 107, 26, 7941–7944Pub…
Abstract An analysis has been made of electron attenuation length data for nine materials in terms of the Bethe theory for inelastic scattering in matter. It was found that the Bethe equation adequately described the energy dependence of the data in all materials over the typical range 100–1500 eV. The Bethe equation…
L J Clarke 1985 Chichester: John Wiley xiii + 329 pp price £31.50 ISBN 0 471 90513 5 This book provides a very readable introduction to low energy electron diffraction and brings the reader up to date in the current thinking and practice of LEED. The subject of surface crystallography is a vast one: indeed, as the aut…
The frequency dependence of the specific heat of glycerol at the glass transition has been measured. A time-temperature equivalence is found - the mean relaxation time having an activation temperature of 2.1.104 K. In the high frequency limit C - C∞ decays as a power law with exponent 0.28
The study of the recently introduced model of a particle in a periodic potential interacting with an external environment has been pursued, and two main new results are reported: (i) The Hamiltonian is exactly soluble for a particular value of the friction coefficient, \ensuremath{\eta}=\ensuremath{\Elzxh}\ensuremath{…
Using a transfer matrix technique and finite size scaling, the authors calculate the exponent nu t of two-dimensional polymers at the theta point. They find nu t =0.55+or-0.01 by two slightly different calculations on the square lattice. This value is compared with those which had been previously proposed in the liter…
Simultaneous electrochemical and ellipsometric studies of the anodic film growth on iron in have revealed that passivation occurs in two stages. During the first stage, which lasts for about 2s, the anodic current is consumed only for film growth, whereas in the second stage release of iron cations into the electrolyt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChiral complexes polymerize methacrylate esters to give helical polymers that mutarotate by uncoilingDonald J. Cram and Dotsevi Y. SogahCite this: J. Am. Chem. Soc. 1985, 107, 26, 8301–8302Publication Date (Print):December 1, 1985Publication History Published online1 May 200…
Abstract The tensile behavior of polypropylene (PP) filled with calcium carbonate particles has been studied using a tensile test. In particular, the effect of strain rate, filler content, and filler size upon the elastic modulus, yield stress, and strain of surface‐modified and unmodified particles‐filled PP were inv…