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 thermodynamic theory of the elastic and dielectric properties of ammonium dihydrogen phosphate is developed on the basis of the improper phase transition. By the representation analysis the transformation properties of the two‐component order parameter are investigated and the thermodynamic potential of t…
The influence of a small pretilt on the voltage dependence of the capacitance ( C - V ) of non-twisting liquid crystal cells is described. Calculated C - V curves were fitted to the observed ones by adjusting the value of a single parameter, the pretilt angle; the magnitudes of the pretilt angle obtained in this way w…
A series of eight alkyl bis(biguanide) analogues of alexidine, N,N''''-1,6-hexanediyl bis[N'-(2-ethylhexyl)imidodicarbonimidic diamide] (1), was prepared. Five of these analogues constituted a series isolipophilic with 1 but with varying bridge length between biguanide moieties. The compounds were evaluated in vitro f…
Abstract Die Inhibitionswirkungen von Propan(1,3)‐biphosphonsäure und Hexan(1,6)‐biphosphonsäure auf die Korrosion von hochreinem Eisen (polykristallin, rekristallisiert) in wäßrigen Sulfatlösungen im Bereich 4 ≤pH ≤6 in Abwesenheit und Gegen wart von Sauerstoff wurde bei T = 298 K untersucht. Es wurden stationäre und…
1. The shells of specimens of Semibalanus balanoides and Balanus balanus were loaded in compression. For shells of similar mass or pseudovolume (1 χ b χ h), B. balanus was about four times as strong as S. balanoides. 2. The morphology of the shell plates and their junctions is described. The shell of B. balanus is mec…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigher coordinate cyanide and isocyanide complexes. 7. Synthesis and characterization of seven-coordinate molybdenum(II) and tungsten(II) isocyanide complexesChiu T. Lam, Miroslav Novotny, David L. Lewis, and Stephen J. LippardCite this: Inorg. Chem. 1978, 17, 8, 2127–2133Pu…
The properties of a particle undergoing translational diffusion in one dimension, in the presence of a cosine potential, are investigated. Translational order parameters are defined and the neutron incoherent scattering law is calculated. The simple diffusion model and the jump model between equidistant sites are foun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilities of carbonium ions in solution. 8. Heats of ionization of some simple alkyl halides in superacidic mediaEdward M. Arnett and Craig PetroCite this: J. Am. Chem. Soc. 1978, 100, 17, 5408–5416Publication Date (Print):August 1, 1978Publication History Published online…
The breakdown threshold and two-photon absorption coefficient are measured in diamond with picosecond pulses at 1.06 and 0.53 μm. The rms breakdown threshold at 1.06 μm is 21.5 MV/cm. The two-photon absorption coefficient at 0.53 μm is less than2.6 \times 10^{-4}cm/MW.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(carbon monofluoride): a solid, layered fluorocarbonPeter Kamarchik, Jr. and John L. MargraveCite this: Acc. Chem. Res. 1978, 11, 8, 296–300Publication Date (Print):August 1, 1978Publication History Published online1 May 2002Published inissue 1 August 1978https://pubs.ac…
We studied the effect of the anisotropic crystal structure of TaSe 3 on its superconducting properties. The upper critical field H c2 was estimated from the resistive transition curve as functions of the field direction and temperature. The large anisotropy of H c2 was found in the plane containing the b -axis and the…
In face-centred-cubic metals the {111} planes are the predominant slip planes. Glide on other less densely packed planes has hitherto not been encountered in specimens deformed at room temperature. Glide dislocations can react with each other and form Lomer-Cottrell (LC) locks; they are split on two intersecting {111}…
Abstract The correlation between number‐average molecular weight and intrinsic viscosity in 60:40 phenol‐ sym ‐tetrachloroethane at 30°C for poly(1,4‐butylene terephthalate) was established from endgroup determinations as well as by gel permeation chromatography, eqs. (1) and (10a). The GPC data also yielded relations…
Abstract— EPR studies of the porphyrin‐sensitized photooxidation of 2, 2, 6,6‐tetramethyl‐piperidine to the nitroxide demonstrate that all the porphyrins examined are able to generate 1 O 2 , although the efficiency of the photoprocess is dependent on the nature of the side chains. Incorporation of metal ions into the…
Thermal expansion coefficients of Fe–Ni alloys were analyzed by using the Grüneisen equation. The anomalous thermal expansion coefficient term, α a , was calculated by subtracting the lattice vibration term described by Grüneisen theory from the experimental data. The anomalous volume change obtained by integrating α…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and properties of cobalt(II) rubredoxinSheldon W. May and Jong-Yuan KuoCite this: Biochemistry 1978, 17, 16, 3333–3338Publication Date (Print):August 8, 1978Publication History Published online1 May 2002Published inissue 8 August 1978https://pubs.acs.org/doi/10.1…
Abstract A series of samples of the acrylamide/acrylic acid system with various compositions was prepared by copolymerization as well as saponification, and some new results on the kinetics of both processes are given. The products were characterized by osmometry, viscometry, GPC, DTA, and elemental analysis. The resu…
By anodization of tungsten in acid solutions, oxide films were obtained whose composition depended on the working temperature. In particular, the composition of the films was WO 3 at 25° and 50°C, but WO 3 · H 2 O at 70°C. Studies of electrochromism in these films seem to show that the electrocoloration occurs with di…
The electric strength of solid insulation may decrease greatly with time of voltage application if discharges occur [1] within gaseous inclusions, [2] at sharp-edged conductors embedded in the solid, [3] on the surface from adjacent conductors, or [4] as a result of surface contamination. Mechanisms of breakdown and f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBonding energies in association ions of aromatic compounds. Correlations with ionization energiesMichael Meot-Ner, Peter Hamlet, Edward P. Hunter, and Frank H. FieldCite this: J. Am. Chem. Soc. 1978, 100, 17, 5466–5471Publication Date (Print):August 1, 1978Publication Histor…