Ryotaro Ohno、Norikazu Ueyama、Akira Nakamura1991-12-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of the distal para substituent through NH---S hydrogen bonds on the positive shift of the reduction potentials of [Fe4S4(Z-cys-Gly-NHC6H4-p-X)4]2- (X = H, OMe, F, Cl, CN) complexesRyotaro Ohno, Norikazu Ueyama, and Akira NakamuraCite this: Inorg. Chem. 1991, 30, 26…
Metal complexes synthesis and propertiesMagnetism in coordination complexesFerrocene Chemistry and Applications
Thadd Reeder、Robert Schleif1991-12-01Journal of Bacteriology
We report the mapping, sequencing, and study of the physiological role of the fourth arabinose-inducible operon from Escherichia coli, araJ. It is located at 9 min on the chromosome and codes for a single 42-kDa protein that shows no significant homology to other known proteins. Destruction of the chromosomal araJ gen…
Bacterial Genetics and BiotechnologyDNA Repair MechanismsEnzyme Structure and Function
J.G. Teng、J. M. Rotter1991-12-01Journal of Structural Engineering
Elevated steel silos commonly consist of a cylindrical shell, a conical hopper, and a skirt. At the intersection of these shell segments, a ring is often provided to sustain the high circumferential compressive stress developed. The cone/cylinder/skirt/ring junction, known as the transition, may fail by plastic collap…
Metal Forming Simulation TechniquesHigh-Velocity Impact and Material BehaviorStructural Response to Dynamic Loads
Jamie Pullen、Michael LaBarbera1991-12-01Biological Bulletin
The interactions between the form of a barnacle aggregation, its flow environment, and the feeding behavior of each individual was determined in unidirectional flows; both models of barnacle aggregations and live barnacles were used. Hill-shaped aggregations of model barnacles captured significantly more particles tha…
Coastal wetland ecosystem dynamicsMicro and Nano RoboticsPickering emulsions and particle stabilization
R.A. Moore、J.M. Benedetto、J.M. McGarrity 等 4 位作者1991-12-01IEEE Transactions on Nuclear Science
The authors examine the effects of neutron irradiation on ferroelectric (FE) lead-zirconate-titanate (PZT) thin films. The data show only a slight loss in the FE switched charge, as measured by the hysteresis loops, up to 1*10/sup 15/ n/m/sup 2/. The retained polarization, as measured by a pulse technique, showed a la…
Ferroelectric and Piezoelectric MaterialsAdvanced Memory and Neural ComputingSolid-state spectroscopy and crystallography
Michael Pohl、Hans Schmickler、Johann Lex 等 4 位作者1991-12-01Angewandte Chemie
Die bereits von Woodward bei der Chlorophyll‐Synthese diskutierten Isophlorine sind als janusköpfige Moleküle ‐ einerseits Porphyrine ( N , N ′‐Dihydroporphyrine), andererseits echte Annulene (der Hückel‐Regel nicht entsprechende [20]Annulene) ‐ strukturchemisch von besonderem Reiz. Während NH‐unsubstituierte Isophlor…
Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Chun‐Hsien Wu、A. C. Su1991-12-01Polymer Engineering and Science
Abstract Grafting of maleic anhydride (MAH) onto ethylene‐propylene rubber (EPR) of apppoximately unitary ethylene/propylene molar ratio was performed by melt mixing in a laboratory‐scale internal mixer with the addition of dicumyl peroxide (DCP) as an initiator. Concurrent with the graft reaction, the simultaneous pr…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer composites and self-healing
I. D. Glover、G. W. Harris、John R. Helliwell 等 4 位作者1991-12-01Acta Crystallographica Section B Structural Science
A range of protein single-crystal diffraction patterns, recorded with intense collimated synchrotron Xradiation are presented. These patterns illustrate the rich and varied nature of the diffuse scattering from this kind of crystal and suggest that the continuous background diffraction will be a source of specific inf…
Protein Structure and DynamicsEnzyme Structure and FunctionX-ray Spectroscopy and Fluorescence Analysis
Hisatoshi Kobayashi、Suong‐Hyu Hyon、Yoshito Ikada1991-12-01Journal of Biomedical Materials Research
In an attempt to develop biodegradable polymers which can be shaped in situ and adhere to living tissues, we synthesized esterurethane prepolymers which can be cured upon contact with water in living tissues. First, D,L-lactide polymerization or D,L-lactide-epsilon-caprolactone (50:50) copolymerization was carried out…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesPolymer composites and self-healing
Philippe Ribière、S. Pirkl、P. Oswald1991-12-01Physical Review A
The phase diagram of a large-pitch cholesteric liquid crystal sandwiched between two parallel glass plates with homeotropic anchoring is determined both experimentally and theoretically. Contrary to previous experiments [P. Ribi\`ere and P. Oswald, J. Phys. (Paris) 51, 1703 (1990)], the materials chosen have a negativ…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsNonlinear Dynamics and Pattern Formation
Linda Sicko‐Goad、Norman A. Andresen1991-12-01Journal of Phycology
ABSTRACT Total extractable lipid (TEL) and lipid composition were studied throughout the growth cycle in three freshwater diatoms ‐Cyclotella meneghiniana Kütz., Melosira varians C. A. Ag., and Stephanodiscus binderanus (Kütz.) Krieg under three light regimes (16:8 h LD, 20:4 h LD, and 12:12 h LD) at 20°C. Two of the…
Marine and coastal ecosystemsAlgal biology and biofuel productionDiatoms and Algae Research
A. A. Wheeler、G. B. McFadden、B.T. Murray 等 4 位作者1991-12-01Physics of Fluids A Fluid Dynamics
The effect of vertical, sinusoidal, time-dependent gravitational acceleration on the onset of solutal convection during directional solidification is analyzed in the limit of large modulation frequency Ω. When the unmodulated state is unstable, the modulation amplitude required to stabilize the system is determined by…
Solidification and crystal growth phenomenaMetallurgical Processes and ThermodynamicsFluid Dynamics and Thin Films
Stanley Bruckenstein、A. Robert Hillman1991-12-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvent and salt transfer upon redox switching of electroactive polymersStanley Bruckenstein and A. Robert HillmanCite this: J. Phys. Chem. 1991, 95, 26, 10748–10752Publication Date (Print):December 1, 1991Publication History Published online1 May 2002Published inissue 1 Dec…
Conducting polymers and applicationsElectrochemical Analysis and ApplicationsAnalytical Chemistry and Sensors
Balbir Singh、R. J. Gilkes1991-12-01Clays and Clay Minerals
Abstract Single crystal X-ray diffraction and electron-optical analysis were used to investigate the weathering of a chromium-bearing muscovite (fuchsite). The muscovite had mostly altered to kaolinite with minor amounts of halloysite occurring between kaolinite plates. Evidence for both epitactic and topotactic growt…
Soil and Unsaturated FlowCO2 Sequestration and Geologic InteractionsClay minerals and soil interactions
Wahbi Jomaa、J. R. Puiggali1991-12-01Drying Technology
An attempt is proposed to modelize the coupling effects between heat transport, mass transport and solid shrinkage during the drying of like gels products. A special attention is laid upon the different ways to determine the solid displacement. Some experimental results are presented to validate the modelling approach.
Textile materials and evaluationsHygrothermal properties of building materialsInnovations in Concrete and Construction Materials
James R. Stevens、Per Jacobsson1991-12-01Canadian Journal of Chemistry
Solutions of LiCF 3 SO 3 and LiClO 4 in acetone and in poly(propylene glycol) (PPG 400 and PPG 4000) have been compared by studying the nondegenerate, symmetric stretch (A 1 ,SO 3 ) and (A 1 ,ClO 4 ) Raman modes. The Raman spectra contain bands due to the symmetric stretching motion of the "free" anion and due to the…
Ionic liquids properties and applicationsAnalytical Chemistry and ChromatographySolid-state spectroscopy and crystallography
Keiko Matsubara、Takurō Tsuzuku、K. Sugihara1991-12-01Physical review. B, Condensed matter
Electron spin resonance in three- and quasi-two-dimensional graphites has been investigated between liquid-helium and room temperatures. The g shift (\ensuremath{\Delta}g) of three-dimensional graphite first increases with lowering temperature (T) so as to form a peak at 20 K, and then steeply falls off. An expression…
Advancements in Battery MaterialsGraphene research and applicationsAdvanced NMR Techniques and Applications
Ricardo A. Maselli、Betty Soliven1991-12-01Muscle & Nerve
We studied the mechanism underlying acute organophosphate intoxication (OPI) through in-vivo and in-vitro electrophysiologic studies in rats injected with diisopropylfluorophosphate. Intoxicated rats showed weakness, repetitive compound muscle action potentials (CMAPs) in response to a single stimulus, and decremental…
Conducting polymers and applicationsMuscle activation and electromyography studiesNeuroscience and Neural Engineering
ALAN J. WILSON、CHARLES A. EVILL、Michael R. Sage1991-12-01Investigative Radiology
This study was performed to assess the relative contributions of contrast medium osmolality and chemotoxicity to contrast-induced blood-brain barrier (BBB) damage. Experimental carotid angiography was carried out in rabbits with mannitol at an osmolality of 714 mOsm/kg, with the nonionic, monomeric contrast media iohe…
Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesMRI in cancer diagnosis
Sachiko Ono、Hideki Ichinose、Noboru Masuko1991-12-01Journal of The Electrochemical Society
The morphology and the formation behavior of various types of defects in porous anodic films formed on high purity aluminum have been studied by electron microscopy. Circular voids were found within anion‐free layers at the triple polar junctions where three cells met. The voids contained oxide particles which appeare…
Corrosion Behavior and InhibitionAnodic Oxide Films and NanostructuresNanoporous metals and alloys