Materials Literature
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Abstract The self-diffusion coefficient (D) of silver ions in silver iodide has been measured between 200 °C and 500 °C. The results can be described by the Arrhenius equation D = 16.62 x 10 -5 exp (-2190/RT), where R is the gas constant in cal/mode, °K and T the temperature in °K. The standard deviation was 0.12 cm 2…
High‐purity strontium, zirconium, and titanium alkoxides were synthesized and characterized as precursors for complex oxides. Simultaneous hydrolytic decomposition either of strontium and zirconium alkoxides or of strontium and titanium alkoxides was used to obtain nearly stoichiometric, ideally mixed SrZrO 3 or SrTiO…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of tris(maleonitriledithiolato)metalatesE. I. Stiefel, Larry Everett Bennett, Z. Dori, T. H. Crawford, C. Simo, and Harry B. GrayCite this: Inorg. Chem. 1970, 9, 2, 281–286Publication Date (Print):February 1, 1970Publication History Published o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared matrix isolation spectrum of the methyl radical produced by pyrolysis of methyl iodide and dimethyl mercuryAlan SnelsonCite this: J. Phys. Chem. 1970, 74, 3, 537–544Publication Date (Print):February 1, 1970Publication History Published online1 May 2002Published inis…
Abstract The preparation of a particulate sialyl transferase from rat liver and its properties are described. The enzyme was used, in the presence of cytidine monophosphate-N-acetylneuraminic acid-1-14C and asialoceruloplasmin, to prepare substantive quantities of radioactive ceruloplasmin. With a completely desialyla…
Article Alloy Chemistry of σ (β-U)-Related Phases III. σ-Phases with Non-Transition Elements was published on February 1, 1970 in the journal International Journal of Materials Research (volume 61, issue 2).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation and spectrum of tetracyanoethylene dimer anion (TCNE)2-Michiya ItohCite this: J. Am. Chem. Soc. 1970, 92, 4, 886–889Publication Date (Print):February 1, 1970Publication History Published online1 May 2002Published inissue 1 February 1970https://pubs.acs.org/doi/10.1…
Abstract : The deformation characteristics of the metastable beta alloy Ti-11. 5Mo-6Zr-4.5Sn (Beta III) have been studied. In the range -196 to +150C, Beta III deforms primarily by mechanical twinning and to a lesser extent by slip and stress-induced orthorhombic martensite formation.
The ability of thermoelectric power measurements to permit a description of carrier-density and phonon-drag variations caused by photoexcitation was tested in 100-Ω·cm n- and p-type silicon. At low temperatures the major effect of photexcitation is to decrease the phonon-drag contribution to the thermoelectric power b…
Existing data an dimensional changes in graphite have been fitted to parabolic temperature-sensitive curves. From these, the graphite life, radiation-induced stresses, and permissible geometries have been calculated. It is concluded existing materials can be utilized in a molten-salt reactor which has a core graphite…
Wavelength discrimination was measured from 480 to 660 nm using wavelength-modulated square-wave gratings. When adjacent grating bars are matched in brightness, wavelength-difference thresholds in all regions of the spectrum increase with spatial frequency within the range of 2.4–19.9 cycles per degree (cpd). Unlike l…
A vibrational analysis was performed for fused silica assuming short‐range order in the glassy network. This order is described by an average structural unit based on the model α‐quartz. The analysis uses a group theoretical method and the Wilson FG‐matrix techniques to predict 16 normal mode vibrational frequencies b…
Human serum and plasma have been shown to abolish the pyrogenicity of poly I:poly C. Chicken serum and, to a lesser extent, fetal calf serum also possess this inhibitory effect, while serums of six other animal species do not alter the pyrogenic properties of this compound. The inhibitory effects are time- and tempera…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Calcium Sulfate Scale Deposition on Heat Transfer SurfacesDavid Hasson and Joseph ZahaviCite this: Ind. Eng. Chem. Fundamen. 1970, 9, 1, 1–10Publication Date (Print):February 1, 1970Publication History Published online1 May 2002Published inissue 1 February 1970h…
Abstract A stable free radical, 2,4,5-triphenylimidazolyl, which was produced by oxidation of 2,4,5-triphenylimidazole, dimerizes to yield two dimers, a photochromic dimer and a piezochromic dimer. The photochromic dimer shows thermochromism and photochromism at temperatures between −196°C and about 200°C both in solu…
Ion-chamber measurements of the photoionization produced by point-to-plane corona discharges in air, oxygen, and nitrogen (commerical grade) over a pressure range of 0.1 to 18 Torr are reported in this paper. The results are expressed in a generalized form that reduces the data for each gas to a single curve relating…
Abstract An x‐ray diffraction method for the simultaneous determination of crystallinity (including intracrystalline defects), effective Debye‐Waller factors, and atomic positions has been developed and applied to semicrystalline polyethylene. It was found that this material unambiguously constitutes a two‐phase syste…
An assessment is made of the relative contributions of mechanical and sonochemical effects to damage suffered by mammalian cells when sonicated in aqueous-suspension culture. In a 1-MHz progressive wave beam, under conditions providing stabilization of the cavitation field, the intensity threshold and intensity optimu…
A careful study of the dispersion of the transverse acoustic phonons and the low-frequency transverse optic phonons in KTa${\mathrm{O}}_{3}$ has been carried out by inelastic neutron scattering. In addition to the well-known temperature dependence of the optic-mode frequencies, both the acoustic-phonon frequencies and…
Using a perturbation expansion based on a strong cubic-field zeroth-order approximation, we have obtained analytical expressions for the $g$ values of the ${{t}_{2}}^{3}$, $^{4}A_{2}$, and $^{2}F$ terms for ${d}^{3}$ impurity ions in trigonal crystal fields. We have compared these expressions whth the results of a num…