Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPentacoordinated Aluminum in Noncalcined Amorphous Aluminosilicates, Prepared in Alkaline and Acid MediumsB. M. De Witte, P. J. Grobet, and J. B. UytterhoevenCite this: J. Phys. Chem. 1995, 99, 18, 6961–6965Publication Date (Print):May 1, 1995Publication History Published on…
In order to describe the evolution of rolling textures in bcc metals, and particularly to assess the contribution of dislocation slip on {123} glide planes, a Taylor model, which makes use of increasing strain relaxation and considers various types of bcc glide system, is applied. The deformation is simulated in the r…
Two new ferroelectric oligosiloxanes, a cyclic tetramer and a twin, have been synthesized. By a comparative study with their corresponding monomer and side chain polysiloxanes, the influence of oligo- and polymerization on the liquid crystalline and ferroelectric properties have been investigated. Polymerization leads…
Crystal structures of mitochondrial aconitase with alpha-methylisocitrate and with sulfate bound have been solved and refined at 2.0 A resolution with R factors of 18.2 and 16.8%, respectively. The steric factors and conformational effects observed in both new structures support the proposed mechanism for the overall…
Abstract Recently, a model was developed for the nonisothermal crystallization of normal alkanes with chain lengths between 30 and 50. The model was derived based on the fundamental equation of Ozawa for nonisothermal crystallization, the surface nucleation theory, and the growth rate theory for extended chain crystal…
Lanthanide chelate labels containing substituted 4-(arylethynyl)pyridine as the chromogenic moiety and iminobis(acetic acid) groups as the chelating part were synthesized. N-Succinimidyl esters of the carboxy derivatives of thyroxine and progesterone were prepared and coupled to the aliphatic amino groups of the synth…
Abstract A novel manganese(III) complex having an optically active N,N′-bis(3-oxobutylidene)diamine ligand with bulky substituents was prepared and characterized crystallographically. In the presence of a catalytic amount of the manganese(III) complex, unfunctionalized olefins were oxygenated to give optically active…
Optical properties of Er3+ -doped fluoride glasses in the pseudoternary systems MFn–BaF2–YF3, where M is Zr, Hf, Al, Sc, Ga, In, or Zn, were investigated, and the variation of the local structure was discussed. Of the three Judd–Ofelt Ωt parameters (t = 2, 4, 6) that dominate the f–f transition probabilities of Er3+ i…
A variety of nonplanar σ-bonded phenyl- and (fluorophenyl)iron(III) porphyrins are characterized as to their electrochemical and spectroscopic properties in nonaqueous media. The investigated compounds are represented as (OETPP)Fe(R), where R = C6H5, C6F4H, or C6F5 and OETPP is the dianion of 2,3,7,8,12,13,17,18-octae…
Abstract A method is presented which allows the calculation of phase diagrams (spinodal, binodal and tie lines) on the basis of the Gibbs energy of mixing Δ G . No derivatives of Δ G with respect to the composition variables are required. This method is particularly useful in cases where the composition dependence of…
Accurate refractive indexes of oxide glasses—silica, silicate, borate, aluminate, tellurite, antimonate, and heavy metal gallate glasses—are presented in the wavelength range 0.265 to 1.710 μm. Factors affecting the refractive index dispersion are discussed by using the single‐oscillator Drude‐Voigt equation. The valu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUpconversion Luminescence in Er3+-Doped RbGd2Cl7 and RbGd2Br7Toni Riedener, Karl Kraemer, and Hans U. GuedelCite this: Inorg. Chem. 1995, 34, 10, 2745–2752Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1995https://pu…
Following the characterization of polyoxypregnane esters and esterified glycosides from the less polar extracts of Leptadenia hastata, 34 new congeners have been isolated from the more polar extracts. They possess sarcostin or deacetylmetaplexigenin as the aglycons and acetyl, benzoyl, cinnamoyl, nicotinoyl, and m-hyd…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange Alternation and Single-ion Anisotropy in The Antiferromagnetic Heisenberg Chain S = 1. Magnetic and Thermal Properties of the Compound Ni2(EDTA).cntdot.6H2OJ. J. Borras-Almenar, E. Coronado, J. Curely, and R. GeorgesCite this: Inorg. Chem. 1995, 34, 10, 2699–2704Pub…
KTA is a crystallographic isomorph of KTP that shows promise for nonlinear frequency generation throughout the 1–5-μm region. We present updated Sellmeier coefficients for KTA based on measurements of the refractive index in the 0.4–3.6-μm region. Predictions of phase-matching behavior by means of these coefficients a…
Diatoms were extracted from subsampled sections of four dated sediment cores collected in the mesohaline Chesapeake Bay, U.S.A. Over 400 species in 76 genera were identified. A complete list of the species identified from the cores is given, together with information on their relative abundance. Forty-six of the more…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Crystal Structure, and Properties of a New Imidazolate-Bridged Copper-Zinc Heterobinuclear Complex with Triethylenetetramine LigandsZong-Wan Mao, Ming-Qin Chen, Xiang-Shi Tan, Jie Liu, and Wen-Xia TangCite this: Inorg. Chem. 1995, 34, 11, 2889–2893Publication Date…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNO Reduction by Activated Carbons. 5. Catalytic Effect of IronM. Jose Illan-Gomez, Angel Linares-Solano, Ljubisa R. Radovic, and Concepcion Salinas-Martinez de LeceaCite this: Energy Fuels 1995, 9, 3, 540–548Publication Date (Print):May 1, 1995Publication History Published o…
Muconate cycloisomerase (EC 5.5.1.1) and chloromuconate cycloisomerase (EC 5.5.1.7) were purified from extracts of Rhodococcus erythropolis 1CP cells grown with benzoate or 4-chlorophenol, respectively. Both enzymes discriminated between the two possible directions of 2-chloro-cis, cis-muconate cycloisomerization and…
Thermoluminescence dosimetry is extensively used for quantitative dose measurements in various irradiation fields such as dosimetry of brachytherapy sources. In this application, small doses on the order of 0.5 cGy must be accurately measured, which requires careful control of instrumentation, energy-dependence, and n…