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Titelei

作者信息未提供1992-07-01Applied Rheology

On quantitative relations among crystal structures

H. Burzlaff、W. Rothammel1992-07-01Acta Crystallographica Section A Foundations of Crystallography

A procedure for the quantitative evaluation of structural relationships among crystal structures is introduced based on the concept of mappings represented by pairs of matrices (A, S). Lattice relationships, symmetry relationships, local atomic deviations and mapping failures are distinguished and for each type of rel…

X-ray Diffraction in CrystallographyCrystallization and Solubility StudiesChemical Thermodynamics and Molecular Structure

Spectacle lens design: a review

David A. Atchison1992-07-01Applied Optics

This review considers the present state of the design of spectacle lenses with respect to minimizing the side effects that are associated with their wear. Topics include spherical lens design, aspheric lens design, progressive addition lenses, spectacle lens materials, assumptions of conventional lens design, and prac…

Ocular Surface and Contact LensTextile materials and evaluationsLiquid Crystal Research Advancements

Thermally reversible crosslinking of polystyrene via the furan–maleimide Diels–Alder reaction

Stephen A. Canary、Malcolm P. Stevens1992-07-01Journal of Polymer Science Part A Polymer Chemistry

Abstract Mixtures of maleimidomethylated polystyrene with difurfuryl adipate or with furfuryl alcohol‐esterified poly[styrene‐co‐(maleic anhydride)] underwent thermally reversible Diels–Alder crosslinking. Reversal of crosslinking occurred rapidly at 150°C. The instability of the furfuryl group, however, limits the pr…

Polymer composites and self-healingSynthesis and properties of polymersPolymer Nanocomposites and Properties

Calculated X‐ray Diffraction Data for Diamond Polytypes

P. D. Ownby、Xi Yang、Jenq Liu1992-07-01Journal of the American Ceramic Society

Calculated X‐ray diffraction pattern data for diamond polytypes are presented, which provides the required parameters for the characterization of the proposed diamond polytypes. The literature on diamond polytypes contains some small but significant errors with respect to the details of the crystal structure, includin…

High-pressure geophysics and materialsAdvanced materials and compositesDiamond and Carbon-based Materials Research

High resolution monochromated X-ray photoelectron spectroscopy of organic polymers: A comparison between solid state data for organic polymers and gas phase data for small molecules

G. Beamson、D. Briggs1992-07-01Molecular Physics

With the new generation of high energy resolution and high intensity XPS spectrometers now commercially available, several novel aspects of the XPS of organic polymers have become apparent. These include observations on the symmetry and width of core line components, effects resulting from the overlap of shake-up and…

Electron and X-Ray Spectroscopy TechniquesX-ray Spectroscopy and Fluorescence AnalysisAdvancements in Photolithography Techniques

Chiral organosilicon compounds in asymmetric synthesis

Tak Hang Chan、D. Wang1992-07-01Chemical Reviews

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChiral organosilicon compounds in asymmetric synthesisT. H. Chan and D. WangCite this: Chem. Rev. 1992, 92, 5, 995–1006Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published inissue 1 July 1992https://pubs.acs.org/doi/10.1021/cr00013a012…

Molecular spectroscopy and chiralityAnalytical Chemistry and ChromatographyMesoporous Materials and Catalysis