Materials Literature
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。
A degradation of untreated fillers in composites stored in distilled water was indicated by an increased sodium and hydroxy ion concentration in storage water, and by examination of the fillers with SEM. Silane treatment of the fillers retarded the leaching process, while cycling stresses accelerated it.
Fimbrin is a cytoskeletal protein associated with microfilaments in microvilli, microspikes, stereocilia, membrane ruffles, and cell--substratum attachment sites. Fimbrin purified from intestinal epithelial cell brush borders was found to be a monomeric protein of molecular weight 68,000. In a sedimentation assay, fim…
Raman spectra in the O–H stretching band in normal and supercooled water have been investigated. Spectra are taken as a function of temperature in the range +95 to −24°C. Absolute Raman cross sections corrected for instrumental and physical factors are obtained. It is shown that the isotropic O–H stretching bands in t…
This study was designed to investigate the relationship between the position of the microtubule organizing center (MTOC) and the direction of migration of a sheet of endothelial cells (EC). Using immunofluorescence and phase microscopy the MTOC's of migrating EC were visualized as the cells moved into an in vitro expe…
Polycrystalline transparent semiconducting zinc oxide films have been deposited by the oxidation of diethyl zinc. The film growth rate is controlled by a complex multistep oxidation process which is dominated by radical reactions. The effect of substrate temperature and gas pressures have been studied. Samples deposit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel packing material for optical resolution: (+)-poly(triphenylmethyl methacrylate) coated on macroporous silica gelYoshio Okamoto, Shiro Honda, Ichiro Okamoto, Heimei Yuki, Shizuaki Murata, Ryoji Noyori, and Hidemasa TakayaCite this: J. Am. Chem. Soc. 1981, 103, 23, 6971–…
Molecular dynamics study of interstitial-solute interactions in irradiated alloys. II. Configurations and binding energies of interstitial-solute complexes in Al-Be, Al-Ca, Al-K, Al-Li and Al-Mg alloys, N Q Lam, N van Doan, L Dagen, Y Adda
The phenomenon of lattice relaxation, namely, that the atomic configuration surrounding a localized centre in solids changes with its change of electronic state, leads to various forms of multiphonon transitions. In optical emission or absorption spectra, such multiphonon transitions can cause shift and broadening of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface spectroscopic study of tungsten-alumina catalysts using x-ray photoelectron, ion scattering, and Raman spectroscopiesLawrence Salvati Jr., Leo E. Makovsky, J. M. Stencel, F. R. Brown, and David M. HerculesCite this: J. Phys. Chem. 1981, 85, 24, 3700–3707Publication D…
Abstract Die Reduktion von C 6 H 5 ) 3 PAuCl mit B 2 H 6 in Benzol ergibt Au 9 , 2 [P(C 6 H 5 ) 3 ] 2 Cl, das mittels Molmassebestimmungen als Au 55 [P(C 6 H 5 ) 3 ] 12 Cl 6 charakterisiert wurde. Ein einfaches Modell, beruhend auf einer Anordnung dichtest gepackter Goldatome, führt zu einem Goldcluster, dessen Aufbau…
Abstract The degradation of poly(ϵ‐caprolactone) in rabbits, rats, and water was studied by measurement of changes in intrinsic viscosity, molecular weight, crystallinity, Young's modulus, and weight. Degradation proceeds by nonenzymatic random hydrolytic cleavage of ester linkages. The process is autocatalytic, and t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer solutions near an interface. Adsorption and depletion layersP. G. De GennesCite this: Macromolecules 1981, 14, 6, 1637–1644Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published inissue 1 November 1981https://doi.org/10.1021/…
Type IV collagen was solubilized from a tumor basement membrane either by acid extraction or by limited digestion with pepsin. The two forms were similar in composition and the size of the constituent chains but differed when examined by electron microscopy and in the fragment pattern produced by bacterial collagenase…
A review is given of experimental and theoretical work on giant Raman scattering (GRS) by molecules adsorbed on the surface of submicroscopic particles of metals such as silver, gold, and copper. The GRS effect, i.e., the enormous (by a factor of 10') increase in the Raman cross section, is described together with exp…
The authors studied the electronic properties of single crystals of the layer-structured ternary compound AuTe 2 Br. The p-conducting material has a typical carrier concentration in the range 10 20 to 10 21 cm -3 . The angular dependence of the Shubnikov-de Haas oscillations has been investigated in order to map out t…
Abstract The problem of step motion during lateral growth in solid-solid phase transformations is re-examined. Results are obtained for the steady motion of an individual ledge when volume diffusion in the parent phase is the predominant contribution to the growth rate. A comparison is made between our results and the…
Essentially identical pretransitional smectic $A$ behavior is reported in both normal and reentrant nematic phases of mixtures of octyloxycyanobiphenyl (8OCB) and hexyloxycyanobiphenyl (6OCB). A phenomenological model which assumes an optimum density for smectic interactions explains quantitatively our correlation len…
Etch-decoration reveals that the rate of removal of carbon atoms exposed at monolayer steps on graphite surfaces depends on the population density of these edge atoms (the rate is higher at a low-density surface) and that carbon removal continues for a prolonged period after the oxygen supply in the gas phase has been…
All subgroups of the magnetic axial point groups are derived, and the invariant ones are indicated. These subgroups can be used in the determination of the symmetry of the low-temperature phase in phase transitions of crystals that are highly anisotropic in one direction (the ferroelectric transition of the chain-type…
The thermal expansion of VSe 2 from 40-1175K has been determined by X-ray diffraction. The lattice expansion is linear with temperature from 40 to about 300K with alpha a =18.6*10 -6 K -1 and alpha c =9.8*10 -6 K -1 . The behaviour alpha a > alpha c is anomalous for a layer compound. From the relation between the ther…