Materials Literature
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The fracture repair of reptilian dermal bones has not previously been reported. Moreover, repair of fractured dermal bones in birds and mammals involves secondary chondrogenesis whereas that of amphibians does not. Therefore an investigation into the repair of fractured reptilian dermal bones could reveal the stage du…
Mechanoelectrical conversion properties of dry human skin have been examined and their origin investigated in dermis, epidermis and horny layer. Shear stress piezoelectricity is observed in all three cutaneous sections. Piezoelectric properties of dermis can be ascribed to its collagen structural network, while the pi…
A M Stoneham 1985 Oxford: Oxford University Press xix + 954 pp price £19.50 (paperback) ISBN 0 19 851378 X Most solid state physicists will inevitably be concerned in their research with the various types of defect present in the materials they deal with and will need to know something of their electronic properties.…
S W S McKeever 1985 Cambridge: Cambridge University Press xiv + 376 pp price £40 ISBN 0 521 24520 6 The stated aim of this book is to unify previously fragmented specialist treatments of thermoluminescence (as in geology or radiation dosimetry, for example) under one banner. I believe this has been achieved.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin state of cobalt(II) in five- and six-coordinate Lewis base adducts of N,N'-ethylenebis(3-carboxysalicylaldiminato)cobalt(II). New spin-crossover complexesPierre Thuery and Jacqueline ZarembowitchCite this: Inorg. Chem. 1986, 25, 12, 2001–2008Publication Date (Print):Jun…
The origin of the occurrence of induced smectic phases (ISP) in binary mixtures of liquid crystals is discussed. First the experimental evidence is reviewed, which leads to a division in strong complexing (electron–donor–acceptor complex as indicated by a charge–transfer band) and weak complexing, where only indirect…
Ultrasonic (70 W, 20 kHz) solution (2%) degradations of poly(alkyl methacrylates) have been carried out in toluene at 27°C and in tetrahydrofuran (THF) at -20°C. Mw and Mn of all polymers (before and after sonification) were computed from GPC. Irrespective of the alkyl substituent, Mw decreased rapidly at first and th…
A new modelling method for magnetic circuits is presented. The method can be used to model magnetic circuits with any number of windings. The models incorporate adequate information about the correct distribution of leakage energy, the presence of gaps throughout the core, the arrangement of the windings, and the type…
Mechanisms of the reversible photodarkening phenomenon have been studied for amorphous S and Se. These materials exhibit smaller photodarkening effects when illuminated with sub-bandgap illumination at 80 K. A configurational model is proposed for interpreting the results, and parameters characterizing the model are e…
Available mmpositional data for l27t samples of natural tetrahedrite and 295 of synthetic tetrahedrite were s1amingd. They show: compositional ranges of four to ten Cu, zero to six Ag, and a total of two (Fe, Zn, Hg) atoms, complete substitution (up to four atems) amongAs, Sb and Te, and a total of 13 atoms of S per f…
Boron nitride films have been deposited by a metal organic chemical vapor deposition (MO‐CVD). The reaction between ammonia and triethylboron is carried out in the temperature range of 750°–1200°C with the molar ratio of . Colorless and transparent films are obtained at temperatures of 950°–1100°C with the molar ratio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman studies of metal tetrakis(4-N-methylpyridyl)porphine: band assignments, structure-sensitive bands, and species equilibriaNils Blom, Junichi Odo, Kazuo Nakamoto, and Dennis P. StrommenCite this: J. Phys. Chem. 1986, 90, 13, 2847–2852Publication Date (Print):Ju…
Abstract Morphology, crystallinity, and melting behaviour of solution‐cast films of poly(ethylene oxide) (PEO)/poly(methyl methacrylate) (PMMA) blends were investigated as a function of composition, using optical and scanning electron microscopy, differential scanning calorimetry, and dilatometry. Up to a content of a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of enthalpy relaxation in poly(methyl methacrylate): effects of tacticity, deuteration, and thermal historyJohn J. Tribone, J. M. O'Reilly, and Jehuda GreenerCite this: Macromolecules 1986, 19, 6, 1732–1739Publication Date (Print):June 1, 1986Publication History Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeuteration effects on the miscibility and phase separation kinetics of polymer blendsHsinjin Yang, Mitsuhiro Shibayama, Richard S. Stein, Nobuyuki Shimizu, and Takeji HashimotoCite this: Macromolecules 1986, 19, 6, 1667–1674Publication Date (Print):June 1, 1986Publication H…
The aim of any diffraction experiment is to obtain reproducible data of high accuracy and precision so that the data can be correctly interpreted and analyzed. Various methods of sample preparation have been devised so that reproducibility, precision and accuracy can be obtained. The success of a diffraction experimen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphology control of binary polymer mixtures by spinodal decomposition and crystallization. 1. Principle of method and preliminary results on PP/EPRNobuyuki Inaba, Kazuo Sato, Shyunichi Suzuki, and Takeji HashimotoCite this: Macromolecules 1986, 19, 6, 1690–1695Publication…
CELLULOSE STRUCTURE AND BIOSYNTHESIS: Natural Celluloses Recent X-Ray Crystallographic Studies of Celluloses Structure of Cellulose - Solvent Complexes Pea Cellulose and Xyloglucan: Biosynthesis and Biodegradation The Primary Cell Wall: A New Model Structure, Swelling and Bonding of Cellulose Fibers Cellulose Carbamat…
Abstract New mechanism of cationic polymerization of cyclic ethers and acetals consisting in the activated (e.g. protonated) monomer addition to the electrically neutral macromolecule e.g.: magnified image is discussed. It is shown, that when the ‐OH in the tail‐group is more nucleophilic than monomer itself this mech…
Abstract The processing, structure and properties of polyetheretherketone (PEEK) semicrystalline thermoplastic as matrix polymer for high performance composites has been investigated in this work. In processing PEEK samples with different crystallinities, a specially designed mold capable of cooling the polymer in exc…