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。
The weak-beam technique of electron microscopy has been used to investigate plate-like G.P. zones in aluminium-copper alloys. For aluminium-1-48 and 3-97 wt% copper alloys aged at 80, 100 and 130°C, G.P. (I) zones of about 35 to 100 Å in diameter were observed. In dark-field images, using the (002) reflection with |s|…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterpenetrating Polymer Networks Based on SBR/PS. 2. Influence of Synthetic Detail and Morphology on Mechanical BehaviorA. A. Donatelli, L. H. Sperling, and D. A. ThomasCite this: Macromolecules 1976, 9, 4, 676–680Publication Date (Print):July 1, 1976Publication History Pub…
The magnetomechanical behavior of the splat-cooled amorphous alloy Fe75P15C10 has been studied at audio frequencies by a vibrating-reed technique. The ΔE effect exhibits a maximum value at a magnetization near 0.5MS. Such a maximum has only rarely been observed in the past, but now appears to be a general feature of t…
As a first step toward constructing a general molecular model for cholesteric liquid crystals, we propose here a planar model in which the intermolecular potential is required to contain chiral contributions as a result of symmetry considerations. By means of a mean-field analysis, we identify the microscopic basis fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization of N-Vinylcarbazole, N-Vinyl-5H-benzo[b]carbazole, and N-Vinyl-7H-benzo[c]carbazoleKen-ichi Okamoto, Masafumi Yamada, Akira Itaya, Tadashi Kimura, and Shigekazu KusabayashiCite this: Macromolecules 1976, 9, 4, 645–649Publication Date (Print):July 1, 1976Public…
In the envelope of Escherichia coli, is a lipoprotein of molecular weight 7,200 as a major envelope protein. This lipoprotein was previously shown to exist in two different forms in the outer membrane of E. coli: the free form and the boundform, which is covalently linked to the peptidoglycau. The free form of the lip…
The fluorescence spectrum of KY3F10: 1% Eu in powder form was recorded at 77 and 4.2°K between 4600 and 7000 Å, and 89 fluorescence lines arising from levels 5D0, 5D1, 5D2, and probably 5D3 were observed. The spectrum agrees with with a C4v symmetry, and it is possible to determine the irreducible representation of th…
A theory is developed for spin-lattice relaxation in the nematic phase which includes both local and collective motion. It is found that the frequency dependence of the relaxation rate ${T}_{1}^{\ensuremath{-}1}$ depends on the correlation time for the motion at the local molecular level, ${\ensuremath{\tau}}_{c}$. Wh…
Measurements of low-temperature specific heats (2-37 K) are reported for the first time on some common paraelectrics (thallous halides, Pb${\mathrm{F}}_{2}$, KTa${\mathrm{O}}_{3}$), ferroelectrics [BaTi${\mathrm{O}}_{3}$, potassium dihydrogen phosphate or KDP, triglycine sulfate or TGS, LiNb${\mathrm{O}}_{3}$, LiTa${\…
The oxidation properties of GaAs(110), GaSb(110), and InP(110) have been studied with the photoemission technique using synchrotron radiation. One part of the work consisted of an investigation of the chemical shifts in the core levels upon adsorption of oxygen in submonolayer quantities. For GaAs and InP, oxygen remo…
Jute fiber properties commonly determined are strength and fineness. The relationship of these fiber properties with the various yarn-strength parameters are discussed. Though fiber bundle strength is closely associated with yarn tenacity, it does not explain satisfactorily the variation in yarn quality. Fineness meas…
The action of chloranil in boiling methanol on 2,7-bis(dimethylamino)-9,l0-dihydroanthracene (5)produces 2,2',7,7'-tetrakis(dimethylamino)-9,9'-bianthracene (6b); dehydrogenation of (5) with palladium-on-carbon in toluene gives 2,7-bis(dimethy1amino)anthracene (1).
This paper deals with the identification of certain species produced during the corrosion of iron in oxygen-containing and oxygen-free solutions. Iron was allowed to corrode in acid solutions of constant pH of NaBr, NaCl, Nal, NaNO3, Na2HPO4, Na2SO4, and NaClO4. These reactions were conducted in (1) air-saturated solu…
The magnetic structure of Mn(Nb0.5Ta0.5)2O6 with columbite structure was determined by means of neutron diffraction using single-crystal data. The intensities were gained by means of a small cold Eulerian cradle. The evaluation leads to a canted magnetic structure GxAz (G: S1 = - S2 = S3 = - S4; A: S1 = - S2 = - S3 =…
Abstract Recent years have seen the development of several physical methods for the study of solid surfaces under ultrahigh vacuum conditions, of which the most important are discussed in this progress report. Contemporary views of the chemisorption bond and the factors affecting it are discussed against the backgroun…
Critical pitting potential and protection potentials were measured potentiodynamically in 0.1N NaCl solution vibrated by a 200 kHz ultrasonic wave. The critical pitting potential was more noble in this environment than in a hydrostatic solution. This fact was confirmed potentiostatically. In hydrostatic solution, the…
Six ethionine-resistant (Etr) regulatory mutants of Saccharomycopsis lipolytica Sl/1 overproducing methionine have been isolated. Five of them are also resistant to seleno-methionine. The activity of homocysteine synthase (O-acetyl-L-hormoserine-acetate lyase, adding hydrogen sulfide) is derepressed in these mutants a…
Results of 16-year tests of metals in tropical sea water total and intermittent immersion and atmospheres are reported. Data are tabulated on carbon and low-alloy steels, alpha and beta brasses, bronzes, NiCu and CuNi, austenitic stainless steels, and commercially pure Al, Cu, Ni, Pb, and Zn, both as single metals and…
Liquid crystals represent states of matter that are intermediate between the crystalline solid and the amorphous liquid. There has been a considerable growth of interest in these mesomorphic states in recent years, partly because of their important applications in display technology. This review article deals with the…
Fine structure, density, and some mechanical properties have been studied in jute fiber dried differently after retting. It is observed that the fiber has a less compact structure before under-going any drying processes after retting. Formation of hydrogen bonding during subsequent drying seems to be the cause of subs…