Claudia Zanchini、R.D. Willett1990-08-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure, magnetism, and electronic and EPR spectroscopies of bis(2-aminopyrimidinium) tetrachlorocuprate(II): a square-planar CuCl42- anion with semicoordinated cationic ligandsClaudia Zanchini and Roger D. WillettCite this: Inorg. Chem. 1990, 29, 16, 3027–3030Publ…
Metal complexes synthesis and propertiesMagnetism in coordination complexesElectron Spin Resonance Studies
D. Ravinder、T. Seshagiri Rao1990-08-01Crystal Research and Technology
Abstract The electrical conductivity (σ) and thermoelectric power ( Q ) of polycrystalline lithiumcadmium ferrites having the chemical formula Li 0.5– x /2 Cd x Fe 2.5– x /2 O 4 where ( x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) have been investigated as a function of temperature. Lithium‐cadmium ferrite with x = 0.4 is fo…
Advancements in Battery MaterialsMultiferroics and related materialsMagnetic Properties and Synthesis of Ferrites
R. Collongues、Didier Gourier、A. Kahn-Harari 等 6 位作者1990-08-01Annual Review of Materials Science
These ferrites were prepared from Fe{sub 2}O{sub 3}, MO oxides (M = Ba,Sr,Pb) and MeO oxides (Me = Mg,Mn,Co,Zn). Chemical compositions of the main barium ferrites (M = Ba) are represented in a ternary diagram. The structures of these various compounds (M,Y,W,Z,X,U) are closely related. The simplest one is the compound…
Magnetic Properties and Synthesis of Ferrites
T. J. Bernatowicz、P. C. Gibbons、R. S. Lewis1990-08-01The Astrophysical Journal
The results are reported of electron energy loss spectra (EELS) measurements on diamond residues from carbonaceous meteorites designed to elucidate the structure and composition of interstellar diamonds. Dynamic effective medium theory is used to model the dielectric properties of the diamonds and in particular to syn…
Astro and Planetary ScienceHigh-pressure geophysics and materialsDiamond and Carbon-based Materials Research
Wei Yang、Wayne A. Hendrickson、E Kalman 等 4 位作者1990-08-01Journal of Biological Chemistry
Ribonuclease H (RNase H) from Escherichia coli is an endonuclease that specifically degrades the RNAs of RNA:DNA hybrids. The enzyme is a single polypeptide chain of 155 amino acid residues, of which 4 are methionines. To solve the crystallographic three-dimensional structure of E. coli RNase H by the multi-wavelength…
DNA and Nucleic Acid ChemistryEnzyme Structure and FunctionBiochemical and Molecular Research
F. Gerhart、William Higgins、Chantal Tardif 等 4 位作者1990-08-01Journal of Medicinal Chemistry
2-(4-Amino-4-carboxybutyl)aziridine-2-carboxylic acid (3) (aziridino-DAP) was identified as the product of spontaneous hydrolysis of alpha-(halomethyl)diaminopimelic acids (alpha-halomethyl-DAPs) 2a-c. Under physiological conditions, 3 is an extremely potent irreversible inhibitor of the bacterial enzyme diaminopimeli…
Enzyme Structure and FunctionPolyamine Metabolism and ApplicationsBiochemical and Molecular Research
Woo Nyon Kim、Charles M. Burns1990-08-01Journal of Polymer Science Part B Polymer Physics
Abstract Blends of bisphenol‐A polyarbonate (PC) and poly(ethylene terephthalate) (PET) has been investigated by differential scanning calorimetry and scanning electron microscopy. Blends were prepared by screw extrusion and solution casting with weight fractions of PC in the blends varying from 0.90 to 0.10. From the…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesMaterial Properties and Processing
R. J. Nelmes、Ross O. Piltz、W. F. Kuhs 等 5 位作者1990-08-01Ferroelectrics
Single-crystal neutron-diffraction studies of PbTiO3, in its tetragonal (ferroelectric) phase at room temperature, at Tc - 60 K and at Tc - 20 K, and in its cubic phase at Tc+ 2 K, Tc + 50 K and Tc + 100 K, give evidence that the phase transition, at T, = 763 K, is order-disorder in character. In particular, the Pb at…
Ferroelectric and Piezoelectric MaterialsPhotorefractive and Nonlinear OpticsSolid-state spectroscopy and crystallography
Rick Panicucci、Thomas C. Bruice1990-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics of the reaction of hydrogen peroxide with a water soluble non .mu.-oxo dimer forming iron(III) tetraphenylporphyrin. 2. The reaction of hydrogen peroxide with 5,10,15,20-tetrakis(2,6-dichloro-3-sulfonatophenyl)porphinato iron(III) in aqueous solutionRick Panicucci a…
Photosynthetic Processes and MechanismsPorphyrin and Phthalocyanine ChemistryHemoglobin structure and function
David A. Rudnick、Charles A. McWherter、S P Adams 等 6 位作者1990-08-01Journal of Biological Chemistry
Saccharomyces cerevisiae myristoyl-CoA:protein N-myristoyltransferase has been efficiently expressed in Escherichia coli and subsequently purified to homogeneity using phosphocellulose chromatography. The interactions between apoenzyme and its acyl-CoA and peptide ligands were examined by an isoelectric focusing gel s…
Protein Structure and DynamicsProtein Kinase Regulation and GTPase SignalingEnzyme Structure and Function
N. P. Érnsting、Horst Weller、Lynne Katsikas 等 4 位作者1990-08-01Journal of the Optical Society of America B
Quantum-size crystallites of Zn0.95Cd0.05S in an aqueous colloidal solution were optically excited using intense subpicosecond laser pump pulses tuned to the exciton band. Optical probing in the UV registered saturation and the kinetics of ground-state recovery due to carrier recombination, with lifetimes in the 0.8–3…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsPhotochemistry and Electron Transfer Studies
Kazuyuki Hiraoka、A. D. L. Chandani、Ewa Górecka 等 6 位作者1990-08-01Japanese Journal of Applied Physics
A T - E phase diagram of MHPOBC (C 8 H 17 O– - -COO– -COO * CH(CH 3 )C 6 H 13 ) has been obtained by means of the temperature ( T ) dependence of the dielectric constant under a dc biased electric ( E ) field. It is presumed from the T - E phase diagram that there is a temperature range where the field-induced antifer…
Liquid Crystal Research AdvancementsSpectroscopy and Quantum Chemical StudiesMolecular spectroscopy and chirality
Michael Hanack、Ahmet Gül、Andreas Hirsch 等 6 位作者1990-08-01Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics
(μ-Oxo)bis[octakis(alkoxy)phthalocyaninatoiron (III)] 6a-c are obtained by treatment of the cyclotetramerisation product of 4,5-bis(alkoxy)-phthalonitriles in lithium pentanolate with iron(II) acetate. Compounds 6a-c are reduced to bisaxially coordinated octaalkoxyphthalocyaninatoiron(II) in the presence of ligands su…
Photosynthetic Processes and MechanismsPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Yoshihiro Iwasa、T. Koda、Y. Tokura 等 6 位作者1990-08-01Physical review. B, Condensed matter
Experimental evidence is presented that indicates the occurrence of a temperature-induced neutral-ionic transition occurring at ${\mathit{T}}_{\mathit{c}}$\ensuremath{\simeq}205 K in the mixed-stack organic charge-transfer crystal, 3,3',5,5'-tetramethylbenzidine-7,7,8,8-tetracyanoquinodimethane (TMB-TCNQ). The transit…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesOrganic and Molecular Conductors Research
Michael R. Wasielewski、Douglas G. Johnson、Mark P. Niemczyk 等 6 位作者1990-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChlorophyll-porphyrin heterodimers with orthogonal .pi. systems: solvent polarity dependent photophysicsMichael R. Wasielewski, Douglas G. Johnson, Mark P. Niemczyk, George L. Gaines III, Michael P. O'Neil, and Walter A. SvecCite this: J. Am. Chem. Soc. 1990, 112, 18, 6482–6…
Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresPhotochemistry and Electron Transfer Studies
Lucila Cescato、Ekkehart Gluch、N. Streibl1990-08-01Applied Optics
Quarterwave plates can be made as holographic gratings in positive photoresist. We studied the effect of the grating period and relief depth on the phase retardation and on the rotation of the polarization of the transmitted light. Experiments were performed with gratings of different periods, which also exhibit an an…
Photonic Crystals and ApplicationsOptical Coatings and GratingsSurface Roughness and Optical Measurements
Robert J. Cernik、P. K. Murray、Philip Pattison 等 4 位作者1990-08-01Journal of Applied Crystallography
A high-angular-resolution two-circle powder diffractometer equipped with long diffracted-beam collimators has been built at Daresbury Laboratory. The diffractometer has encoders mounted directly on the 2θ and ω axes. These give a nominal angular resolution of 0.1 and 1.0 mdeg respectively. Repeated scans of single pow…
Nuclear Physics and ApplicationsX-ray Diffraction in CrystallographyCrystallography and Radiation Phenomena
Wesley R. Burghardt、Gerald G. Fuller1990-08-01Journal of Rheology
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Wesley R. Burghardt, Gerald G. Fuller; Transient shear flow of nematic liquid crystals: Manifesta…
Liquid Crystal Research AdvancementsRheology and Fluid Dynamics Studies
D A Keys、L McAlister-Henn1990-08-01Journal of Bacteriology
Mitochondrial NAD(H)-specific isocitrate dehydrogenase was purified from Saccharomyces cerevisiae for analyses of subunit structure and expression. Two subunits of the enzyme with different molecular weights (39,000 and 40,000) and slightly different isoelectric points were resolved by denaturing electrophoretic techn…
Protein Structure and DynamicsAdvanced Proteomics Techniques and ApplicationsEnzyme Structure and Function
Yuxin Shen、G. Paul Neitzel、D. F. Jankowski 等 4 位作者1990-08-01Journal of Fluid Mechanics
Energy stability theory has been applied to a basic state of thermocapillary convection occurring in a cylindrical half-zone of finite length to determine conditions under which the flow will be stable. Because of the finite length of the zone, the basic state must be determined numerically. Instead of obtaining stabi…
Solidification and crystal growth phenomenaFluid Dynamics and Thin Films