Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Hydrogen thermal motion in calcium hydroxide: Ca(OH)2
Calcium hydroxide, Ca(OH) 2 , M r =74, trigonal, P3m1, a=3.589 (8), c=4.911 (14) A, V=54.8 (4) A 3 , D x =2.26 cm -1 at room temperature, Z=1, λ=0.8330 (5) A, μ=1.195 cm -1 , F(000)=9.028 fm, final R=0.018, wR=0.019, for 105 unique reflections, at 80 K; R=0.025, wR=0.027, for 211 unique reflections, at room temperatur…
Interaction of two cavitation bubbles with a rigid boundary
The motion of two cavitation bubbles near a rigid boundary is observed experimentally using a high-speed camera and compared against numerical solutions obtained using a boundary integral method. The comparisons are favourable with regard to both bubble shape history and centroid motion. The bubbles show a range of re…
Polymer-controlled drug delivery systems
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer-controlled drug delivery systemsRobert LangerCite this: Acc. Chem. Res. 1993, 26, 10, 537–542Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published inissue 1 October 1993https://pubs.acs.org/doi/10.1021/ar00034a004https://doi.…
Synthesis and properties of poly(hydroxyurethane)s
Abstract Bis(cyclic Carbonate)s 1 were prepared by the reaction of bis(epoxide)s and atmospheric pressure of CO 2 in the presence of sodium iodide and triphenylphosphine as catalysts at 100°C in high yield. Polyaddition of 1 and hexamethylenediamine ( 2a ) or dodecamethylenediamine ( 2b ) in dimethylsulfoxide or N , N…
Pressure-induced phase transition in SiC
X-ray diffraction studies have been made of cubic (3C) and hexagonal (6H) polytypes of SiC under pressures to 105 and 95 GPa, respectively, using a diamond-anvil cell and an imaging plate technique. 3C-SiC undergoes a phase transition into the rocksalt-type structure at 100 GPa or higher accompanied by a volume reduct…
Development of Continuum Damage Mechanics for Elastic Solids Sustaining Anisotropic and Unilateral Damage
This article deals with the phenomenological approach of Continuum Damage Mechanics and the consistent modeling of damaging processes incorporating two specificities:
Polytype Diversity of the Hydrotalcite-Like Minerals I. Possible Polytypes and their Diffraction Features
Abstract All possible polytypes of hydrotalcite-like minerals with a periodicity along the c axis of one-, two- and three-layers, as well as the simplest six-layer polytypes, were derived on the basis of the concept of closely packed brucite-like layers. Multilayer structures were found to be possible in several polyt…
Facile elaboration of porphyrins via metal-mediated cross-coupling
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFacile elaboration of porphyrins via metal-mediated cross-couplingStephen G. DiMagno, Victor S. Y. Lin, and Michael J. TherienCite this: J. Org. Chem. 1993, 58, 22, 5983–5993Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published iniss…
Linear and Nonlinear Optical Properties of TeO 2 Glass
A thin plate of TeO 2 glass of 5.0 × 4.0 × 0.25 mm 3 size, which was large enough for various optical measurements, was obtained by a rapid quenching method. The linear refractive index was measured as a function of wavelength from 486.1 to 1000 nm. The refractive index at 486.1 nm was as high as 2.239. The optical en…
X-ray-absorption studies of zirconia polymorphs. I. Characteristic local structures
Characteristic extended x-ray-absorption fine structure and x-ray-absorption near-edge structure spectra of zirconia polymorphs (monoclinic, orthorhombic, tetragonal, and cubic) have been identified at 10 K. For the host cations, these spectra are phase dependent but dopant independent because the dopant perturbation…
Strain hardening of thermoplastics
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStrain hardening of thermoplasticsR. N. HawardCite this: Macromolecules 1993, 26, 22, 5860–5869Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published inissue 1 October 1993https://pubs.acs.org/doi/10.1021/ma00074a006https://doi.org/10…
Bragg gratings in an acrylate polymer consisting of periodic polymer-dispersed liquid-crystal planes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBragg gratings in an acrylate polymer consisting of periodic polymer-dispersed liquid-crystal planesR. L. Sutherland, L. V. Natarajan, V. P. Tondiglia, and T. J. BunningCite this: Chem. Mater. 1993, 5, 10, 1533–1538Publication Date (Print):October 1, 1993Publication History…
Microbial degradation of poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in soils
The microbial degradation of tensile test pieces made of poly(3-hydroxybutyrate) [P(3HB)] or a copolymer of 90% 3-hydroxybutyric acid and 10% 3-hydroxyvaleric acid was studied in soils incubated at a constant temperature of 15, 28, or 40 degrees C for up to 200 days. In addition, hydrolytic degradation in sterile buff…
Porphyrin sponges: conservative of host structure in over 200 porphyrin-based lattice clathrates
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPorphyrin sponges: conservative of host structure in over 200 porphyrin-based lattice clathratesMarianne P. Byrn, Carol J. Curtis, Yu Hsiou, Saeed I. Khan, Philip A. Sawin, S. Kathleen Tendick, Aris Terzis, and Charles E. StrouseCite this: J. Am. Chem. Soc. 1993, 115, 21, 94…
Quantitative mineralogical analysis using the Rietveld full-pattern fitting method
Ansrnlcr Quantitative phase analysis of a number of multicomponent standard and natural mineral mixtures has been done using an adaptation of the Rietveld method. Binary mixtures (most 50:50 by weight) of corundum with quartz, hematite, ilmenite, magnetite, biotite, analcime, mordenite, or clinoptilolite were analyzed…
Number of relevant independent points in x-ray-absorption fine-structure spectra
A discussion is given of the amount of information present in x-ray-absorption fine-structure spectra. It is shown that the usual formulations underestimate the degrees of freedom by at least one.Received 1 June 1993DOI:https://doi.org/10.1103/PhysRevB.48.9825©1993 American Physical Society
The Physics of Macropore Formation in Low Doped n‐Type Silicon
Macropore formation in n‐type silicon is a self‐adjusting phenomenon characterized by a specific current density at the pore tip. At this specific current density, the dissolution reaction changes from the charge‐transfer‐limited to the mass‐transfer‐limited regime. The passivation of the pore walls in hydrofluoric ac…
Changes in macromolecular organization in collagen assemblies during secretion in the nidamental gland and formation of the egg capsule wall in the dogfish Scyliorhinus canicula
Abstract The thickest layer (L2) of the egg capsule wall of the dogfish, Scyliorhinus Canicula, is constructed largely from highly ordered collagen fibrils (Knight & Hunt 1976). This collagen is stored and secreted by the nidamental gland and passes through an extraordinary series of ordered phases, m any of which…
A partial discharge monitor for the measurement of partial discharges in a high voltage plant by the transient earth voltage technique
Several proprietary discharge detectors are available that are suitable for measuring the magnitudes of the partial discharges in plants such as high voltage metalclad switchgear. Their main disadvantages are the high capital cost of the test equipment and the complexity of the testing procedure. When performing such…