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。
High-resolution vibrational electron-energy-loss spectra of amorphous ice films condensed at 14 K are reported for the incident-energy range 1--18 eV. Absolute electron scattering cross sections for elastic collisions, individual vibrational excitations, and the sum of electronic transitions are obtained by performing…
The retarded modes of a superlattice comprising alternating layers of two magnetic media characterized by a gyrotropic permeability tensor are investigated. The transfer matrix and dispersion relation are given in general form; a number of previous results are included as special cases. An effective-medium description…
No abstract; see full text
High-resolution x-ray photoelectron spectroscopy has been used to study the formation of the aluminum/polyimide (Al/PI) interface at room temperature. Aluminum films up to 80 Å thick were vapor deposited onto cured polyimide in situ. Our results show that Al is chemically active for coverages below ∼20 Å. Preferential…
An analytical method is proposed to determine absolute total cross sections per scatterer and related mean free paths for low-energy electron scattering in disordered molecular solid films. The procedure is based on a two-stream multiple-scattering model of the thickness dependence of the film reflectivity for elastic…
In order to study the phase-separation process near the critical point of fluid mixtures (spinodal decomposition) without the influence of the Earth's gravity, we have used a carefully density-matched system of deuterated cyclohexane, cyclohexane, and methanol. Such a system is known to behave as a real binary fluid […
The refractive index of the polymer np is adjusted relative to the ordinary refractive index of dispersed droplets of nematic liquid crystal no to regulate the angle of maximum transmission through a film in the presence of an applied field. Maximum transmission occurs at normal incidence when np≤no with the breadth o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlgorithms for the identification of three-dimensional maximal common substructuresAndrew T. Brint and Peter WillettCite this: J. Chem. Inf. Comput. Sci. 1987, 27, 4, 152–158Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Published inis…
Abstract Using three methods to attempt to identify the presence of ester‐linked porphyrins in Photofrin® II, lithium aluminum hydride reduction, basic hydrolysis and proton NMR. it can be concluded that 40‐50% of such linkages are present. The majority of the remaining material is cleaved by acid hydrolysis, which is…
Solubility of NiO in Al 2 O 3 was determined by electron probe microanalysisy A diffusion couple method was used by coupling an NiO‐doped Al 2 O 3 polycrystal to a pure single crystal of Al 2 O 3 . The solubility of NiO in Al 2 O 3 in air was 230 wt ppm (157 at. ppm of cations) and 170 wt ppm (116 at. ppm) at 2073 and…
Abstract Für Bauteile, die mit Benzin, Kerosin und Mineralölen in Kontakt kommen, werden in zunehmendem Maße organische Werkstoffe eingesetzt, wie z.B. hochdichtes Polyethylen, Phenolharze, Polyamide, Polyester, Acrylharze, Epoxy‐ und Fluorcarbonharze, allein oder als Verbundwerkstoffe mit Glas‐, Kohlenstoff‐ und Aram…
Introduces students to X-ray photoelectron spectroscopy, the chemical information revealed by the "chemical shift", the surface sensitivity of the technique, and the enhancement of composite data by employing nonlinear least-squares curve-fitting routines.
Abstract The Raman and infrared spectra of NiCl 2 ·6H 2 O, NiCl 2 ·6D 2 O, CoCl 2 ·6H 2 O, CoCl 2 ·6D 2 O and CoBr 2 ·6H 2 O single crystals have been measured in the range 3600–30 cm −1 (Raman) and 3800–400 cm −1 (IR). The water internal modes have been best assigned for NiCl 2 ·6H 2 O, including Fermi resonance effe…
Powder neutron-diffraction experiments at pressures up to 8.2 kbar and temperatures down to 0.3 K have been performed on the antiferromagnetic ternary compound ${\mathrm{Tm}}_{2}$${\mathrm{Fe}}_{3}$${\mathrm{Si}}_{5}$. For pressures between 2 and 21 kbar, this system becomes superconducting at ${T}_{c1}>{T}_{N}$, w…
A constitutive relation is formulated for coated fabrics that exhibit both elastic and inelastic, but time‐independent, responses. The nonlinear orthotropic response is represented by an elastic portion related to yarn stretch and coating shear, and an inelastic part related to crimp interchange. A method is proposed…
ABSTRACT The stability of glutamine and pyroglutamic acid as regards pH, temperature and oxygen was studied during storage and two thermal processings, the residual products and those which appeared being determined. Contrary to glutamic acid, the two derivatives are labile below pH 2 and above pH 13 and alteration oc…
It has recently been reported that 8S clathrin trimers or "triskelions" form larger 27S oligomers upon dialysis into low ionic strength buffers (Prasad, K., R. E. Lippoldt, H. Edelhoch, and M. S. Lewis, 1986, Biochemistry, 25:5214-5219). Here, deep-etch electron microscopy of the 27S species reveals that they are clos…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBreakdown of passivity and localized corrosion processesH. BoehniCite this: Langmuir 1987, 3, 6, 924–930Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Published inissue 1 November 1987https://doi.org/10.1021/la00078a010RIGHTS & PERMISS…
Abstract CB facilitates strain-induced crystallization and increases the size of the crystallized zone at the stressed crack tip. Both effects are major reinforcement mechanisms that increase the fracture resistance of CB-reinforced NR.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(dimethylsiloxane-co-diphenylsiloxanes): synthesis, characterization, and sequence analysisG. N. Babu, S. S. Christopher, and R. A. NewmarkCite this: Macromolecules 1987, 20, 11, 2654–2659Publication Date (Print):November 1, 1987Publication History Published online1 May…