The relationship between the structural type of anionic group and SHG effect in boron-oxygen compounds
The relationship between the structural type of anionic group and SHG effect in oxide compounds has been reviewed.
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Crystallographic study of the low-spin iron(II) and iron(III) bis complexes of 1,4,7-triazacyclononane
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallographic study of the low-spin iron(II) and iron(III) bis complexes of 1,4,7-triazacyclononaneJan C. A. Boeyens, Alister Forbes, Robert D. Hancock, and Karl WieghardtCite this: Inorg. Chem. 1985, 24, 19, 2926–2931Publication Date (Print):September 1, 1985Publication…
Elastic moduli of ultradrawn polyethylene
Abstract The five independent elastic moduli C 11 , C 12 , C 13 , C 33 , and C 44 of oriented high‐density polyethylene with draw ratio λ from 1 to 27 have been determined from −60 to 100°C by an ultrasonic method at 10 MHz. At low temperature the sharp rise in the axial extensional modulus C 33 with increasing λ and…
Preparation and characterization of poly[oxy(2,6‐dimethyl‐1,4‐phenylene)] with functional end groups
Abstract The oxidative polymerization of 2,6‐dimethylphenol ( 1 ) and the halogen displacement polymerization of 4‐halo‐2,6‐dimethylphenols ( 4 ) yielded poly[oxy(2,6‐dimethyl‐1,4‐phenylene)] ( 2 ) with one phenolic end group. 2,2′,6,6′‐Tetramethyl‐4,4′‐isopropylidenediphenol ( 9a ) was used as comonomer in both polym…
Perhalogenierte 1,2,3,5‐Dithiadiazolium‐Salze und 1,2,3,5‐Dithiadiazole
Abstract Synthesen der perhalogenierten 1,2,3,5‐Dithiadiazolium‐Salze FCN 2 S 2 + Cl − ( 5 ) (durch Metathese aus ClCN 2 S 2 + Cl − mit AgF 2 ), FCN 2 S 2 + AsF 6 − ( 5a ) (aus 5 und AgAsF 6 ), CF 3 CN 2 S 2 + Cl − ( 11 ) (aus CF 3 CN und S 3 N 3 Cl 3 in fl. SO 2 (bei dieser Reaktion werden als Nebenprodukte u.a. S 5…
Nonlinear Broensted-type plot in the pyridinolysis of 2,4-dinitrophenyl benzoate in aqueous ethanol
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonlinear Broensted-type plot in the pyridinolysis of 2,4-dinitrophenyl benzoate in aqueous ethanolEnrique A. Castro and Carlos L. SantanderCite this: J. Org. Chem. 1985, 50, 19, 3595–3600Publication Date (Print):September 1, 1985Publication History Published online1 May 200…
Analytical microscope studies of sintered Nd-Fe-B magnets
Various sintered Nd15Fe77B8permanent magnets supplied by different producers have been examined by analytical electron microscopy. An identical microstructure was found in all of the different magnets. Three phases were detected by means of high resolution electron microscopy, electron diffraction and x-ray microanaly…
Low‐temperature glass transition in proteins
Abstract The viscoelastic properties of solid samples (crystals, amorphous films) of hen egg white lysozyme, bovine serum albumin, and sperm whale myoglobin were studied in the temperature range of 100–300 K at different hydration levels. Decreasing the temperature was shown to cause a steplike increase in the Young's…
Crystal-field transitions inf-electron oxides
Neutron inelastic scattering has been used to measure for the first time the ground- to excited-state crystal-field transitions in ${\mathrm{PrO}}_{2}$ (130 meV), ${\mathrm{BaPrO}}_{3}$ (255 meV), and ${\mathrm{UO}}_{2}$ (\ensuremath{\sim}160 meV). Details of these neutron experiments using the epithermal neutrons fro…
Impact ionization coefficients of electrons and holes in
The arsenic composition dependences of electron and hole ionization coefficients, α and β, in
Progress Toward Understanding the Stress Corrosion Problem
This paper describes current understanding of the propagation of transgranular stress corrosion cracking (TGSCC) in engineering alloys. In contrast to intergranular stress corrosion cracking (IGSCC), which proceeds by preferential anodic dissolution at the crack tip, TGSCC is considered to propagate by discontinuous b…
Ferrimagnetic to spin glass transition in the mixed spinel Mg1+tFe2-2tTitO4: a Mossbauer and DC susceptibility study
Mossbauer and DC susceptibility studies are reported on the mixed spinel Mg 1+t Fe 2-2t Ti t O 4 at various temperatures and in an external magnetic field. Results are obtained indicating that on increasing dilution t, the collinear ferrimagnetic phase breaks down before reaching the ferrimagnetic percolation limit as…
Ground term splitting of high-spin cobalt(2+) ion as a probe of coordination structure. 1. Dependence of the splitting on coordination geometry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGround term splitting of high-spin cobalt(2+) ion as a probe of coordination structure. 1. Dependence of the splitting on coordination geometryMarvin W. Makinen, Lawrence C. Kuo, Moon B. Yim, Gregg B. Wells, James M. Fukuyama, and Judy E. KimCite this: J. Am. Chem. Soc. 1985…
Compensatory phosphorylation of isocitrate dehydrogenase. A mechanism for adaptation to the intracellular environment.
When Escherichia coli grows on acetate, the flow of isocitrate through the glyoxylate bypass is regulated, in part, through the phosphorylation of isocitrate dehydrogenase. In addition to its role in adaptation to alternative carbon sources, this phosphorylation system responds to variation in the intracellular level…
Magnetic interactions in metal complexes of binucleating ligands. 2. Synthesis and properties of binuclear copper(II) compounds containing exogenous ligands that bridge through two atoms. Crystal and molecular structure of a binuclear .mu.-pyrazolato-N,N'-bridged dicopper(II) complex of 1,3-bis(salicylideneamino)propan-2-ol
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic interactions in metal complexes of binucleating ligands. 2. Synthesis and properties of binuclear copper(II) compounds containing exogenous ligands that bridge through two atoms. Crystal and molecular structure of a binuclear .mu.-pyrazolato-N,N'-bridged dicopper(II…
Ceramic/metal joining for structural applications
Technological advances are extending the applications for bonded ceramic-metal components and demanding more rigorous performance characteristics. The techniques available for fabricating high–integrity joints for structural applications have been reviewed and attention is drawn to the factors that effect both direct…
Organic superconductors: structural aspects and design of new materials
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic superconductors: structural aspects and design of new materialsJack M. Williams, Mark A. Beno, Hau H. Wang, Peter C. W. Leung, Thomas J. Emge, Urs Geiser, and K. Douglas CarlsonCite this: Acc. Chem. Res. 1985, 18, 9, 261–267Publication Date (Print):September 1, 1985P…
PHOTOCHEMICAL ACTIVATION OF ALUMINUM–ALKYL BOND IN ALUMINUM PORPHYRIN. CONJUGATE ADDITION REACTION WITH VINYL KETONE
Abstract Tetraphenylporphinatoaluminum ethyl undergoes addition reaction toward vinyl ketone via a novel enolate aluminum porphyrin as the intermediate. This reaction is remarkably accelerated upon irradiation with visible light retaining the reaction mode.
Effects of α‐Radiolysis on Leaching of a Nuclear Waste Glass
The effects of α‐radiolysis on leaching were studied in compositionally identical Pu‐doped waste glass samples which were prepared at different α‐activities (dose rates) by varying the 239 Pu/ 238 Pu isotopic ratio in the Pu dopant. The results of 14‐, 28‐, and 56‐d static leach tests at 40°C, in both deionized water…
New layered ternary chalcogenides: tantalum palladium sulfide (Ta2PdS6), tantalum palladium selenide (Ta2PdSe6), niobium palladium sulfide (Nb2PdS6), niobium palladium selenide (Nb2PdSe6).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew layered ternary chalcogenides: tantalum palladium sulfide (Ta2PdS6), tantalum palladium selenide (Ta2PdSe6), niobium palladium sulfide (Nb2PdS6), niobium palladium selenide (Nb2PdSe6).Douglas A. Keszler, Philip J. Squattrito, Nathaniel E. Brese, James A. Ibers, Maoyu Sha…