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。
Abstract The infra‐red spectrum of polyvinyl acetate has been studied from 4000 to 150 cm‐1 and a detailed assignment made. To assist with the assignments the partially deuterated polymer, poly‐α, α, β‐trideuterovinyl acetate, and a branched‐chain acetate have been synthesised and their spectra examined.
Abstract From the differential thermal and thermogravimetric analyses of potassium oxalate together with the X-ray diffraction studies, three crystallographic modifications of the anhydrous salt were found. When potassium oxalate monohydrate crystals were dehydrated at, e.g., 140°C, phase II, which is stable below 381…
Abstract The literature on polymer morphology contains many studies of structural and orientation changes occurring upon uniaxial stretching of films and fibers, but it has only an occasional reference to such studies on biaxially stretched film. This paper presents data on a structural change due to simultaneous biax…
The principles governing formation of superficial oxides on metal surfaces are surveyed. Oxide crystals grow on a metal surface by rearrangement and place exchange within metal-oxygen substructures arising from the accumulation of oxygen by adsorption processes. The rate-controlling steps for growth of films are discu…
Electrical conductivity and magneto resistance effect of Ni, Cu, Zn and metal free phthalocyanine single crystals were investigated. The electrical conductivity and the activation energy in phthalocyanine were expressed by following equations \begin{aligned} \sigma{=}Ne\mu_{D}\exp\left(\frac{\varDelta S}{2k}\right)\ex…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorresponding states and the glass transition for alkali metal nitratesC. A. Angell and D. B. HelphreyCite this: J. Phys. Chem. 1971, 75, 15, 2306–2312Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs…
The susceptibility of 18% Ni (250) maraging steel to stress corrosion cracking in 3.5% NaCl solution has been investigated. Metallographic and fractographic examinations show distinct differences between specimens broken under free corrosion conditions and those broken under hydrogen charging conditions. It is propose…
The sintering of uranium mononitride (UN) depends on temperature and the N 2 pressure maintained over the nitride during heat treatment. At a given temperature, an N 2 pressure that maintained the UN in the single‐phase region slightly above the phase boundary where the reaction UN→U+½N 2 (g) occurred was most effecti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMutual solubilities of propylene carbonate and waterArthur G. Williamson and Neil F. CatherallCite this: J. Chem. Eng. Data 1971, 16, 3, 335–336Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs.acs.or…
The Hall mobility, thermoelectric power, magnetoresistance and optical absorption coefficient of Mg x Pb 1− x Te alloys with 0less-than-or-eq, slant x less-than-or-eq, slant0·06 have been measured at temperatures within the range 77 to 450 K. It has been found that alloying PbTe with MgTe increases the direct energy g…
The Hall mobility and thermoelectric power of n- and p-type Cd x Pb 1− x Te alloys with x = 0·03, 0·06 and 0·11 have been measured at temperatures within the range 77 to 450 K for carrier concentrations within the range 10 16 to 10 20 cm −3 . The results have been interpreted using a two valence band model. The energy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1,2-Dithiolene complexes of ruthenium and ironA. L. Balch and Joel MillerCite this: Inorg. Chem. 1971, 10, 7, 1410–1415Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs.acs.org/doi/10.1021/ic50101a019…
To better determine the optical properties of the rare-earth oxysulfide phosphors and to lay the foundation for their application in single-crystal form as scintillators and lasers we have grown, for the first time, single crystals of these materials. A description of present growth techniques will be presented. Mater…
Th e refrac tiv e indi ces of a commercia l fu sed silica s pec im e n were de termin ed at ten wa ve len gth s from 404.7 to 667.8 nm over the tempe ra ture range from -200 to + 20 C. Th e data a re neede d for th e des ign o f optical sys te ms for s pace app lication s wh e re th e e xtrem es of te mpe rat ure are…
Polyethylene single crystals attached to a copper substrate were plastically deformed at −196°C and 20°C. Slip lines were observed at all temperatures on the surface of the crystals. The observations suggest that plastic deformation in polyethylene crystals may occur by crystallographic slip due to the movement of dis…
The effect of gain variation on the integrated output-charge distribution of a photomultiplier tube is investigated experimentally and shown to be a predictable function of the multiplier single-electron response. Standardized or nonstandardized pulses recorded using either capacitive or digital storage are considered…
Abstract The effects of polymer molecular weight, molecular weight distribution, and orientation on the rate of relaxation‐controlled sorption of n‐pentane by glassy polystyrene were studied. The sorption follows Case II kinetics but for films which sorb slowly the sorption rate increases at relatively long times unti…
A revision of the family Nitrobacteraceae Buchanan is proposed. It is requested that the Judicial Commission issue an Opinion placing the generic names Nitrosocystis Winogradsky, Nitrosogloea Winogradsky, and Nitrocystis Winogradsky on the list of rejected names as nomina dubia. Organisms currently placed in these gen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of tris(glycinato)chromium(III) monohydrate, Cr(C2H4NO2)3.H2ORobert F. Bryan, Peter T. Greene, Peter F. Stokely, and Edmond W. Wilson Jr.Cite this: Inorg. Chem. 1971, 10, 7, 1468–1473Publication Date (Print):July 1, 1971Publication History Pub…
In ${\mathrm{Y}}_{2}$${\mathrm{O}}_{2}$S: Eu and ${\mathrm{La}}_{2}$${\mathrm{O}}_{2}$S: Eu, excitation into the charge-transfer states (CTS) of ${\mathrm{Eu}}^{+3}$ leads partially to the dissociation of the CTS into ${\mathrm{Eu}}^{+2}$ and a free hole which may subsequently be trapped. The extent of CTS dissociatio…