G. Heppke、F. Oestreicher1977-08-01Zeitschrift für Naturforschung A
Abstract A simple way of determining the helix screw sense of a cholesteric phase using the Grandjean-Cano method is described. The helix pitch as well as its sense is investigated for ten cholesteric phases, induced by mesogenic chiral compounds in the nematic isomere mixture of 4-methoxy-4′-n-butylazoxybenzene (Nem…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsMolecular spectroscopy and chirality
Victor W. Day、M. F. FREDRICH、W. G. Klemperer 等 4 位作者1977-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of the dimolybdate ion, Mo2O72-V. W. Day, M. F. Fredrich, W. G. Klemperer, and W. ShumCite this: J. Am. Chem. Soc. 1977, 99, 18, 6146–6148Publication Date (Print):August 1, 1977Publication History Published online1 May 2002Published inissue 1 A…
Polyoxometalates: Synthesis and ApplicationsCatalysis and Oxidation ReactionsChemical Synthesis and Characterization
Donald B. McCormick1977-08-01Photochemistry and Photobiology
INTRODUCTION 11.MODEL SYSTEMS (a) Intermolecular cases (b) Intramolecular cases 111.FLAVOPROTEMS (a) Tyrosyl cases (b) Tryptophanyl cases (c) Other cases IV.CONCLUSIONS
Antioxidant Activity and Oxidative StressMolecular Sensors and Ion DetectionPorphyrin and Phthalocyanine Chemistry
JW Bowden、AM Posner、JP Quirk1977-08-01Soil Research
A completely general theory is presented which can be used to describe both anion and cation adsorption on amphoteric oxide surfaces. It takes account of the fact that both the surfaces and adsorbing species are charged and that the surfaces change their charge when ionic adsorption takes place. The theory is applicab…
Soil and Unsaturated FlowClay minerals and soil interactionsIron oxide chemistry and applications
J. E. Bigelow、R. A. Kashnow1977-08-01Applied Optics
The Poincaré sphere representation, a geometrical method for solving problems involving the propagation of polarized light through birefringent and optically active media, is applied to several electrooptic liquid crystal problems. The emphasis is on the twisted nematic case, for which the quiescent state solution was…
Liquid Crystal Research AdvancementsOptical Polarization and EllipsometryMolecular spectroscopy and chirality
Der‐Hang Chin、John Del Gaudio、Gerd N. La Mar 等 4 位作者1977-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetection and characterization of the long-postulated iron-dioxygen-iron intermediate in the autoxidation of ferrous porphyrinsDer-Hang Chin, John Del Gaudio, Gerd N. La Mar, and Alan L. BalchCite this: J. Am. Chem. Soc. 1977, 99, 16, 5486–5488Publication Date (Print):August…
Electrochemical sensors and biosensorsPorphyrin and Phthalocyanine ChemistryElectrochemical Analysis and Applications
D. Williams、E Mort1977-08-01PubMed
In a preliminary study of the enzyme-polymer interactions, the role of 15 enzymes in the in vitro hydrolysis of polyglycolic acid has been investigated. Carboxypeptidase A, alpha-chymotrypsin, clostridiopeptidase A and ficin increase the rate of hydrolysis of this synthetic polymer, illustrating the ability of enzymes…
biodegradable polymer synthesis and propertiesElectrospun Nanofibers in Biomedical ApplicationsEnzyme Production and Characterization
D. W. Murphy、H. S. Chen、B. Tell1977-08-01Journal of The Electrochemical Society
Ionic and electronic conductivity has been measured in and . Ionic conductivity was measured by using as a blocking electrode for electronic conduction. Transference numbers were confirmed by cells of the type . Ionic conductivities were for and , respectively, at room temperature. The conductivity of increases abrupt…
Advanced Thermoelectric Materials and DevicesSolid-state spectroscopy and crystallographynanoparticles nucleation surface interactions
G. Jézéquel、J. C. Lemonnier、J. Thomas1977-08-01Journal of Physics F Metal Physics
The authors performed optical measurements consisting of near normal incidence reflectance (2-11 eV) and multiangle reflectance measurements (11-15 eV) on gallium films condensed on cooled glass substrates in a vacuum of 2*10 -10 Torr. Optical constants were determined with the help of a Kramers-Kronig analysis of the…
Electron and X-Ray Spectroscopy TechniquesSurface Roughness and Optical MeasurementsSurface and Thin Film Phenomena
S. K. Deb1977-08-01Physical review. B, Solid state
The ESR spectra of single crystals and amorphous thin films of W${\mathrm{O}}_{3}$ have been measured in the temperature range 77-300\ifmmode^\circ\else\textdegree\fi{}K. In the case of single crystal the observed resonance lines were identified as due to ${\mathrm{Mo}}^{5+}$ ions. The observed values are: ${g}_{\math…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsTransition Metal Oxide Nanomaterials
Michael J. Minot1977-08-01Journal of the Optical Society of America
Normal incidence measurements of single-layer gradient refractive-index antireflection films, produced by a chemical etch-leach process on glass sensitized by a phase-separating heat treatment, indicate very low reflection over a broad wavelength regime, 0.35–2.5 μm. First-surface measurements of the reflectance of th…
Advanced Fiber Optic SensorsPhotonic Crystals and ApplicationsOptical Coatings and Gratings
F. A. Kröger1977-08-01Annual Review of Materials Science
Many of the physical properties of crystalline solids depend on the presence of native or foreign point def ects. In pure compound crystals the native defects are atoms missing from lattice sites where, according to the crystal structure, atoms should be (vacancies); atoms present at sites where atoms should not be (i…
Metallurgical and Alloy Processes
Keisuke Tajima、Yoshikazu Ishikawa、Peter Webster 等 6 位作者1977-08-01Journal of the Physical Society of Japan
The spin waves in a Heusler alloy Cu 2 MnAl were investigated at several temperatures by neutron inelastic scattering. The spin wave dispersion relations along three principal directions were systematically explored across the whole magnetic Brillouin zone at 4 K. The results were analysed using the Heisenberg Hamilto…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsHeusler alloys: electronic and magnetic properties
Ryoichi Nakagaki、Takayoshi Kobayashi、Junko Nakamura 等 4 位作者1977-08-01Bulletin of the Chemical Society of Japan
Abstract Photochromism of N-salicylideneanilines and related compounds was studied by measuring the electronic and vibrational spectra of the transient species. The rise time of the transient electronic spectra of the photochromic colored species was measured by picosecond time-resolved spectroscopy and was found to b…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesPhotochromic and Fluorescence Chemistry
E. M. Engler、B. A. Scott、S. Etemad 等 5 位作者1977-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic alloys: synthesis and properties of solid solutions of tetraselenafulvalene-tetracyano-p-quinodimethane (TSeF-TCNQ) and tetrathiafulvalene-tetracyano-p-quinodimethane (TTF-TCNQ)E. M. Engler, B. A. Scott, S. Etemad, T. Penney, and V. V. PatelCite this: J. Am. Chem. So…
Molecular Junctions and NanostructuresOrganic and Molecular Conductors ResearchElectronic and Structural Properties of Oxides
Bärbel Friedrich、Boris Magasanik1977-08-01Journal of Bacteriology
Urease was purified 24-fold from extracts of Klebsiella aerogenes. The enzyme has a molecular weight of 230,000 as determined by gel filtration, is highly substrate specific, and has a Km for urea of 0.7 mM. A mutant strain lacking urease was isolated; it failed to grow with urea as the sole source of nitrogen but did…
Enzyme Structure and FunctionBiochemical and Molecular ResearchCancer Research and Treatments
James A. Whitney、John C. Stormer1977-08-01OpenAlex
The partitioning of NaAlSi/sub 3/O/sub 8/ between coexisting microcline and plagioclase solid-solutions is modeled using published Margules parameters for microcline-low albite solid-solutions. Variations in the structural state of the alkali feldspar may shift the temperature calculated from coexisting feldspar pairs…
Concrete and Cement Materials ResearchGlass properties and applicationsClay minerals and soil interactions
Carlos J. Serna、G. E. VanScoyoc、J. L. Ahlrichs1977-08-01American Mineralogist
lnfrared spectra ofthe coordinated water in palygorskite were studied at different degrees of exchange of deuterons and protons. The single peaks observed for the bending fundamental of isotopically diluted HrO and DzO show that all the coordinated water molecules are equivalent, as suggested by Bradley's structure de…
Groundwater and Isotope GeochemistryClay minerals and soil interactionsIron oxide chemistry and applications
James B. Hendrickson1977-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSystematic synthesis design. 6. Yield analysis and convergencyJames B. HendricksonCite this: J. Am. Chem. Soc. 1977, 99, 16, 5439–5450Publication Date (Print):August 1, 1977Publication History Published online1 May 2002Published inissue 1 August 1977https://doi.org/10.1021/j…
Optimal Experimental Design MethodsCrystallization and Solubility StudiesHistory and advancements in chemistry
M.A. Hitchman1977-08-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of low-spin cobalt(II) Schiff base complexesM. A. HitchmanCite this: Inorg. Chem. 1977, 16, 8, 1985–1993Publication Date (Print):August 1, 1977Publication History Published online1 May 2002Published inissue 1 August 1977https://pubs.acs.org/doi/10.1021/i…
Organometallic Complex Synthesis and CatalysisMetal complexes synthesis and propertiesMagnetism in coordination complexes