Complexation of poly(oxyethylene) in analytical chemistry. A review
T. Okada, Analyst, 1993, 118, 959 DOI: 10.1039/AN9931800959
Materials Literature
文献浏览
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。
Small Specimen Test Techniques Applied to Nuclear Reactor Vessel Thermal Annealing and Plant Life Extension
Description 31 papers cover three wide-ranging topics: • unique small and miniature specimens, as well as nondestructive, nonintrusive, and in-situ test techniques for measuring mechanicals and fracture properties • application of those techniques to assess irradiation-induced embrittlement • and actual examples of th…
Preparation of ultrafine powders of TiO2 by hydrothermal H2O2 oxidation starting from metallic Ti
Ultrafine powders of TiO2 have been prepared by combined hydrothermal H2O2 oxidation. H2O2 oxidation and gel formation were performed at room temperature. Hydrothermal treatment was carried out at 140 °C. Anatase powder was formed in distilled water and rutile powder was formed in 1.0 mol dm–3 nitric acid solution. DT…
Characterization of Cu-CuTCNQ-M devices using scanning electron microscopy and scanning tunneling microscopy
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of Cu-CuTCNQ-M devices using scanning electron microscopy and scanning tunneling microscopyJ. J. Hoagland, X. D. Wang, and K. W. HippsCite this: Chem. Mater. 1993, 5, 1, 54–60Publication Date (Print):January 1, 1993Publication History Published online1 May 2…
Dicopper( II , II ) and dicopper( I , II ) complexes of a series of dinucleating macrocycles
The dinucleating macrocycles H2Lm,n containing two 2,6-di(aminomethyl)-4-methylphenol entities combined through two alkane chains, (CH2)m and (CH2)n, at the amine nitrogens have been prepared for the (m,n) sets (2,3), (2,4), (2,5), (3,3) and (3,4). The dinuclear copper(II) complexes having general formula [Cu2Lm,n][Cl…
Grain Growth of Strontium Ferrite Crystallized from Amorphous Phases
Amorphous phases have been prepared by melt spinning technique from the oxide samples having compositions 41.3 mol%SrO-41.3 mol%Fe2O3-17.4 mol%B2O3 (composition S) and 63.1 mol%SrO-19.4 mol%Fe2O3-17.5 mol%B2O3 (composition T). When these amorphous phases are heat-treated by heat treatment, SrO·6Fe2O3 crystal particles…
The isocitrate dehydrogenase phosphorylation cycle: Regulation and enzymology
Isocitrate dehydrogenase (IDH) of Escherichia coli is regulated by phosphorylation and dephosphorylation. This phosphorylation cycle controls the flow of isocitrate through the glyoxylate bypass, a pathway which bypasses the CO2 evolving steps of the Krebs' cycle. IDH is phosphorylated at a single serine which resides…
Site-directed mutagenesis identifies aspartate 33 as a previously unidentified critical residue in the catalytic mechanism of rabbit aldolase A.
The expression and purification of the rabbit muscle aldolase A (D-fructose 1,6-bisphosphate:D-glyceraldehyde-3-phosphate lyase, EC 4.1.2.13) from an expression plasmid in bacteria is described. The enzyme is produced in bacteria at a level of 300 mg/liter and is indistinguishable from the enzyme isolated from muscle…
AC electromigration characterization and modeling of multilayered interconnects
The AC electromigration of multilayered interconnect systems consisting of TiW-AlSiCu and CVD W-AlSiCu is studied under stress of repetitive dual-pulse current waveforms at 2 MHz. By using a general AC waveform in which the peak current density of the first pulse j/sub 1/ is fixed and the second is varied from +j/sub…
Coupling of ion and electron transport during impedance measurements on a conducting polymer with similar ionic and electronic conductivities
The ionic and electronic conductivities of poly-[1-methyl-3-(pyrrol-1-ylmethyl)pyridinium perchlorate] have been measured as a function of potential in various solvents by impedance spectroscopy. The ionic conductivity of this polymer shows a strong solvent dependence, ranging from 0.31 mS cm–1 in water to 8.0 µS cm–1…
Quantitative analysis of gadopentetate dimeglumine excreted in breast milk
Specimens of breast milk were obtained from each breast in a lactating patient for a 24-hour period after a gadolinium-enhanced MR imaging examination was performed. A quantitative analysis of gadolinium content in specimens obtained at 2, 11, 17, and 24 hours after the intravenous administration of gadopentetate dime…
Pentadecavanadate, V 15 O 42 9– , a new highly condensed fully oxidized isopolyvanadate with kinetic stability in water
The X-ray structure of the new fully oxidized isopolyvanadate, (TMA)3H6VV15O42·2.5H2O 1(TMA = tetramethyl-ammonium), prepared by reaction of H2O2 with VOSO4·4H2O shows a bicapped Keggin structure with four-, five- and six-coordinate vanadium atoms; 51V NMR indicates that the same structure has considerable kinetic sta…
Mechanism of .beta.-hydride elimination in adsorbed alkoxides
The fluorinated ethanols F(n)CH(3-n)CH20H (n = 0-3) form fluorinated ethoxides when adsorbed on oxidized Cu(111), Cu(110), Cu(100), and Ag(110) surfaces. The fluorinated ethoxides decompose at elevated temperatures by Beta- hydride elimination to yield fluorinated acetaldehydes. Inclusion of fluorine in the methyl gro…
Siloxane and hydrocarbon octopus molecules with silsesquioxane cores
Hydrogen silsesquioxane, (HSiO)8, T8, has been synthesized and isolated in synthetically useful quantities. The T8 cage-like structure allows eight pendant groups to be placed symmetrically about the surface of a sphere to form an ‘octopus’ molecule. Using T8 to hydrosilylate compounds with the formula CH2CH(X)nY, oct…
Structure of Hexatitanooctadecatungstodigermanate
Abstract The structure of a dimeric Keggin-typed polyoxotungstate, [Ge2Ti6W18O77]14−, was investigated by X-ray diffractometry and 183W NMR spectroscopy. K9H5[Ge2Ti6W18O77]·16H2O crystallizes in triclinic a = 17.582(4), b = 22.139(5), c = 12.960(2) Å, α = 101.26(2), β = 94.07(2), γ = 109.20(2)°, V = 4622(4) Å3. The D3…
A newly developed high resolution hot stage and its application to materials characterization
This paper describes the newly developed specimen hot stage and its applications. The hot stage is designed for high resolution TEM image observation at high temperatures and EDX analysis at room temperature. A fine metal wire is employed as the heating element of the stage and battery is used as the heating power sou…
Kinetic study on chemical oxidation of leucoemeraldine base polyaniline to emeraldine base
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic study on chemical oxidation of leucoemeraldine base polyaniline to emeraldine baseDoo Kyung Moon, Masahiro Ezuka, Tsukasa Maruyama, Kohtaro Osakada, and Takakazu YamamotoCite this: Macromolecules 1993, 26, 2, 364–369Publication Date (Print):January 1, 1993Publication…
Acetylene, methylacetylene and ethylacetylene polymerization on H-ZSM5: a spectroscopic study
Acetylene, methylacetylene and ethylacetylene interact with the Brønsted acid sites of H-ZSM5 with the formation of hydrogen-bonded (precursor) species characterized by well defined IR properties. These precursors are then protonated to give intensely coloured carbocationic species. The speed of protonation is in the…
Crystal structure and magnetic properties of manganese-copper complex MnCu(obbz)(H2O)3.cntdot.DMF (obbz = N,N'-oxamidobis(benzoato) and DMF = dimethylformamide), a precursor of the molecular-based magnet MnCu(obbz).cntdot.H2O with Tc = 14 K
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of manganese-copper complex MnCu(obbz)(H2O)3.cntdot.DMF (obbz = N,N'-oxamidobis(benzoato) and DMF = dimethylformamide), a precursor of the molecular-based magnet MnCu(obbz).cntdot.H2O with Tc = 14 KFrancesc Lloret, Miguel Julve, Rafa…
Shaped crystal growth
Preface. Introduction. 1. Dynamic Stability of Crystallization - the Basis of Shaped Crystal Growth. 2. The Czochralski Technique. 3. Techniques of Pulling from Shaper. 4. The Verneuil Technique. 5. The Floating-Zone Technique. 6. Radial Instability of Vapor Whiskers. 7. Stability of Cylindrical Pore Growth. 8. Two Sh…