Materials Literature
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The dependence of the nonequilibrium partition coefficient $k$ of Bi in Si upon solidification velocity $v$ has been measured with sufficient accuracy to distinguish between proposed solute-trapping mechanisms. For the range of measured velocities, 2-14 m/s, we observe a much more gradual increase in $k$ with increasi…
The substitution of hydroxyproline for proline in position Y of the repeating Gly-X-Y tripeptide sequence of collagen-like poly(tripeptide)s (i.e., in the position in which Hyp occurs naturally) is predicted to enhance the stability of aggregates of triple helices, while the substitution of Hyp in position X (where no…
While MnTe has the stable NiAs structure with a direct band gap of 1.30 eV and a Mn-Te bond length of 2.92 \AA{}, extrapolation of the data for the zinc-blende alloy ${\mathrm{Cd}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{Te}$ to $x=1$ suggests an alloy-stabilized MnTe phase with very different properties: a band ga…
(4 ,000-1 0,000), urea nitrogen (BUN) 22 mg/dl (8-20), creatinine 1.9 mg/dl (0 .5-1 .0) , and uric acid > 12 mg/dl (2.7-7.8). Bilirubin was 1.4 mg/dl (0 .1-0.9) and SGOT, LDH , and alkaline phosphatase were elevated. Serum osmolality was 330 mosmoles/kg (269-298), while
Alloying additions of 0.25–1.0 wt‐% B to austenitic manganese steels lead to the formation of carboborides arranged in a cell‐type microstructure. Pin abrasion tests on flint grinding paper using different dead weight loads reveal that these carboborides do not substantially improve the wear resistance due to a relati…
Article Untersuchungen zum Aufbau von interferenzfähigen Deckschichten auf gaskontrastiertem HfC-Co-Hartmetall / Investigations about the Structure of Interference Coatings on Gas-Contrasted HfC-Co Hard Metal was published on June 1, 1986 in the journal Practical Metallography (volume 23, issue 6).
Abstract Kinetic and equilibrium measurements were carried out for the complexation reaction of nickel(II) malate and nickel(II) tartrate in an aqueous solution at 20 °C and at pressures up to 100 MPa. From the pressure dependence of the stability constant and the rate constant, the reaction volume, ΔV0, and the activ…
The structures of glasses in the system CuO‐PbO‐SiO 2 have been investigated by Raman and Fourier transform infrared (FTIR) spectroscopy. Glasses of compositions represented by 2 x CuO.(1 – x) PbO.(l – x)SiO 2 (x = 0 to 0.1) and 3 x CuO.(l – x)PbO.2(l – x)SiO 2 (x=0 to 0.1) may contain up to 2 and 4 mol% CuO, respecti…
The structures of chromium deposits on iron from plating solutions containing chromium in the hexavalent and trivalent forms have been examined and compared. The two deposits are referred to as hexavalent and trivalent deposits, respectlvely. The hexavalent deposits are microcrystalline and epitaxial, but the trivalen…
Abstract Irradiation of Mes3SiN3 in 3-methylpentane at 77 K or −140 °C yields the silanimine, Mes2Si=NMes. The silanimine is yellow (λmax=296, 444 nm) and decomposes at temperatures above ca. −120 °C.
Tellurian tennantite with up to I I .17 wt,qo Te was found in copper-rich ores of the Besshi-type Ikadazu and Sazare deposits in the Sambagawa metamorphic belt in Japan. Electron-miooprobe analyses of the tellurian tennantite rweal that Teq+ substitutes for (As,Sb)3+, and electricalcharge-balance is maintained by simu…
The photoinduced oxidation of tetra(N-methyl-4-pyridyl)porphyrinmanganese(III) has been achieved in homogeneous solution. The manganese porphyrin was used as an electron donor in a three-component system with tris-(2,2'-bipyridine)ruthenium(II) as the photosensitizer and chloropentaamminecobalt(III) as the electron ac…
High-frequency travelling-bubble cavitation noise generated on a Schiebe headform is analyzed with reference to several existing noise theories which are based on the collapse of a single spherical bubble. After normalizing the noise level by a bubble event rate, the normalized cavitation number based on the minimum p…
Abstract X‐Ray diffraction and neutronographical studies on the crystal structure of the perovskitelike compounds A(Cu 1− x Mn x )Mn 4 O 12 have been undertaken. It has been shown that the samples with 50% of Mn 3+ in the octahedral sites have a cubic unit cell, while the samples with higher Mn 3+ composition may have…
A material balance closure calculation is presented to test the consistency of a previously published model of a parallel plate electrochemical reactor. New expressions are used in this procedure to calculate the average concentration of species i and the average current density for reaction j from the predicted conce…
Abstract Neu dargestellt wurde KLi 6 [IrO 6 ] aus innig verriebenen Gemengen von K 4 [IrO 4 ] und Li 2 O (Ag‐Bömbchen, 30 d, 750°C). Die tiefdunkelroten Einkristalle kristallisieren trigonal‐rhomboedrisch, Raumgruppe R 3 m, mit a = 819,61(8) pm, c = 709,96(11) pm und Z = 3. Es liegt aufgefüllte Variante des α‐Li 6 [UO…
In the course of a half-reaction of enzymic transamination, the aldimine adduct formed between the coenzyme pyridoxal 5'-phosphate and the amino acid substrate tautomerizes to the ketimine intermediate which is then hydrolyzed to the oxo acid product and the pyridoxamine 5'-phosphate form of the enzyme. In the reverse…
ESR spectra of K2SO4 crystals irradiated with x rays at 26 K contain signals from a novel type of defect in three inequivalent configurations. The g tensors, linewidths, and hyperfine splittings from one potassium nucleus all indicate that the defects are structurally analogous to the primary electron-excess defects […
Abstract A finite element method coupled with the method of characteristics is applied to the problem of convective‐dispersive transport with non‐equilibrium reaction. Convective terms are calculated using moving particles together with influence element meshes for particle tracking, whereas dispersion terms are calcu…
A Coulter Counter, Model TAII, was used to determine both solubility and surface specific dissolution rate of two sparingly soluble materials suspended in micellar solutions. The equilibrium solubility increased linearly with surfactant concentration, thereby making it possible by extrapolation to characterize materia…