Materials Literature
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M H Loretto and R E Smallman London: Chapman and Hall 1976 pp ix + 134 price £5.50 (cased), £3.50 (paperback) This book, based on courses given by the authors at Birmingham University, is aimed at providing students and young experimentalists with simple explanations of transmission electron microscope techniques for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution Properties of Poly(D-β-hydroxybutyrate). 1. Biosynthesis and CharacterizationS. Akita, Y. Einaga, Y. Miyaki, and H. FujitaCite this: Macromolecules 1976, 9, 5, 774–780Publication Date (Print):September 1, 1976Publication History Published online1 May 2002Published i…
The helical rotary senses for a number of non-sterol cholesteric liquid crystals have been determined and from the results, a simple rule relating molecular structure, absolute configuration and twist sense is proposed. The rule has been used to predict correctly the helical twist senses for some new cholesterogens.
In the passive region of austenitic stainless steels alloyed with Mo, the formation of MoO42− ions can be expected in neutral halide solutions by the transpassive dissolution of Mo. It has been shown that MoO42− ions added to neutral NaCl solutions act as an effective inhibitor against pitting of austenitic stainless…
Abstract Cadmium sorption by montmorillonite from solutions in the 15 to 120 ppb range was studied in the presence of increasing concentrations of NaClO 4 , NaCl, and Na 2 SO 4 solutions. The ionic strengths ranged from 0.01 to 1.00. Increasing ionic strengths decreased the amount of Cd sorbed on the clay surfaces. Th…
Abstract An extensive study of the effects of stereoisomeric variations in aromatic polyimide structures on polyimide properties was conducted. The structural variations were incorporated into the polyimides through the use of two complete series of isomeric aromatic diamine monomers, the diaminodiphenylmethanes and t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPacking Analysis of Carbohydrates and Polysaccharides. 6. Molecular and Crystal Structure of Regenerated Cellulose IIArthur J. Stipanovic and Anatole SarkoCite this: Macromolecules 1976, 9, 5, 851–857Publication Date (Print):September 1, 1976Publication History Published onl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic effects in transition metal porphyrins. The reactions of imidazoles and pyridines with a series of para-substituted tetraphenylporphyrin complexes of chloroiron(III)F. Ann Walker, Man-Wai Lo, and Molly T. ReeCite this: J. Am. Chem. Soc. 1976, 98, 18, 5552–5560Publ…
This study confirms the predominance of surface thermodynamic effects in the process of particle engulfment by solidifying melts for small-diameter particles and slow interface motion. Predictions of a thermodynamic model are compared with actual particle engulfment behavior. It turns out that, in complete quantitativ…
Abstract A nonlinear inhomogeneous relaxation equation for the alignment tensor is derived from a Fokker-Planck-equation for the orientational distribution function where torques exerted by a molecular field and by the gradient of the flow velocity are taken into account. Phenomenological coefficients characterizing t…
Abstract The crystallinity and crystallizability of poly(phenylene sulfide) have been examined by a number of common techniques. Several provided qualitative information, but only one, x‐ray diffraction, was considered sufficiently reliable and reproducible to allow quantitative comparisons. Based on x‐ray measurement…
In a creeping solid holes may grow by vacancy condensation or by the action of the applied stress producing strains at the surface of the hole which cause it to grow. The latter mechanism does not involve a vacancy flux to the hole. A comparison of the two processes indicates the conditions under which hole growth wit…
A Landau-Ginzburg free energy is presented that yields a nematic to smectic-$A$ (NA) transition, a nematic to smectic-$C$ (NC) transition, and a Lifshitz point (at the boundary between the NA and NC transitions). Fluctuation enhancements of the Frank elastic constants are calculated. For the NC transition, all three e…
Phases can be determined for geometrically redundant amplitudes by iteration of the following procedure: compute an electron density map from the currently available phases; average the electron densities of all the crystallographically independent molecules; rebuild the crystal(s) from this averaged subunit, setting…
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