Robert D. Walkup、Nihal Obeyesekere1988-02-01The Journal of Organic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-functionalized silyl enol ethers. Part 2. Silyl enol ethers bearing stereogenic silicon atoms and chiral alkoxy groups: the effect of these groups upon the facial selectivity of the epoxidation of an enol double bondRobert D. Walkup and Nihal U. ObeyesekereCite this:…
Mesoporous Materials and CatalysisPolyoxometalates: Synthesis and ApplicationsOxidative Organic Chemistry Reactions
F Miura、Masakuni Mogi、Yoshiaki Ohura1988-02-01European Journal of Orthodontics
Japanese nickel titanium (NiTi) alloy wire possesses excellent spring-back properties, shape memory and super-elasticity. In order to adapt this wire to clinical use, it is necessary to bend as well as to control its super-elastic force, and so a direct electric resistance heat treatment (DERHT) method was developed.…
Shape Memory Alloy Transformations
C.J. Thomas、R.G.J. Edyvean、R. Brook1988-02-01Biofouling
Corrosion fatigue is considered to be one of the most important factors in determining the life of static offshore structures such as platforms for oil and gas production; the combination of corrosive environment and cyclic stress can produce failure of metals by the development and growth of cracks. Seawater provides…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsStructural Integrity and Reliability Analysis
Gary W. Adams、R. J. Farris1988-02-01Journal of Polymer Science Part B Polymer Physics
Abstract The thermodynamic behavior of poly(bisphenol A carbonate) (PC) during uniaxial cold drawing and the properties of the drawn polymer were examined. Isothermal deformation calorimetric measurements were made during the drawing process. The deformation calorimeter measures heat, work, and internal energy changes…
Mechanical Behavior of CompositesPolymer crystallization and propertiesPolymer Nanocomposites and Properties
Stephen C. Saris、Donald C. Wright、Edward H. Oldfield 等 4 位作者1988-02-01Journal of Cerebral Blood Flow & Metabolism
Intracarotid artery infusions in animals are commonly performed in studies of the blood-brain barrier and in chemotherapy trials. Implicit in the analysis of these experiments is that the infusate will be distributed to the territory of the internal carotid artery in a manner that is proportional to blood flow. Fiftee…
Glioma Diagnosis and TreatmentAdvanced MRI Techniques and ApplicationsLanthanide and Transition Metal Complexes
P. Šimon、François Gervais、E. Courtens1988-02-01Physical review. B, Condensed matter
The infrared-reflectivity spectra of ${\mathrm{KH}}_{2}$${\mathrm{PO}}_{4}$ (KDP) and its isomorphs ${\mathrm{RbH}}_{2}$${\mathrm{PO}}_{4}$ (RDP) and ${\mathrm{KH}}_{2}$${\mathrm{AsO}}_{4}$ (KDA) are reported in a wide spectral range (from 20 to 4000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$), in the paraelectric and…
Glass properties and applicationsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Ingeborg Levin、Bernd Kromer、Michael Barabas 等 4 位作者1988-02-01Health Physics
Carbon-14 data on atmospheric CO2 as well as on plant material (tree leaves and wheat) from the vicinity of two German boiling water reactors (Philippsburg and Isar/Ohu) are reported. Atmospheric CO2 samples taken routinely with an integration time of one or two weeks 1.75 km downwind of the Philippsburg reactor (900…
Radioactive contamination and transferGraphite, nuclear technology, radiation studiesNuclear and radioactivity studies
Andrzej Ożarowski、Bruce R. McGarvey、Anil B. Sarkar 等 4 位作者1988-02-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR study of manganese(II) in two crystalline forms of bis(2,2'-bi-2-thiazoline)bis(thiocyanato)iron and the high-spin-low-spin transition that occurs in only one form. X-ray structure determination of both formsAndrzej Ozarowski, Bruce R. McGarvey, Anil B. Sarkar, and John…
Metal complexes synthesis and propertiesMagnetism in coordination complexesElectron Spin Resonance Studies
R. Dupree、M. H. Lewis、Mark E. Smith1988-02-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-resolution silicon-29 nuclear magnetic resonance in the Y-Si-O-N systemR. Dupree, M. H. Lewis, and M. E. SmithCite this: J. Am. Chem. Soc. 1988, 110, 4, 1083–1087Publication Date (Print):February 17, 1988Publication History Published online1 May 2002Published inissue 17…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsAdvanced NMR Techniques and Applications
John Robertson1988-02-01Philosophical Magazine Letters
The sp2 sites present in the various forms of amorphous carbon have been shown to form aromatic clusters whose size determines the width of the local band gap. A fluctuating band-edge model is developed to describe the effects of this clustering on the localization of states around the gap. It is shown how localized s…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchFullerene Chemistry and Applications
Shinichi Hirose、Y. Suzuki1988-02-01Proceedings of the National Academy of Sciences
In a posterior silk gland extract, covalently closed circular (ccc) DNA is in a superhelical state that supports more transcription of fibroin gene than does linear DNA. A HeLa cell extract showed neither the supercoiling activity nor the preference for the transcription of ccc DNA over linear DNA. These activities co…
Plant Virus Research StudiesViral Infectious Diseases and Gene Expression in InsectsSilk-based biomaterials and applications
H-M Ludwig、Peter Eyerer1988-02-01Polymer Engineering and Science
Abstract This paper discusses the effect of varying cooling rates during crystallization on the spherulitic structure of poly(butalene terephthalate). Light microscopy, transmission electron microscopy, and differential scanning calorimetry were used to examine specimens. The mechanical properties of the polymers stud…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
John M. Charlesworth1988-02-01Polymer Engineering and Science
Abstract The effects of systematically varying the crosslink density on the mechanical relaxations in the glassy region of typical highly crosslinked diepoxide‐diamine polymers are reported. Activation enthalpies and intensities for the β relaxation have been measured using a torsion pendulum at 1 Hz. The glyceryl gro…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesConducting polymers and applications
In Seok Kang、L. Gary Leal1988-02-01The Physics of Fluids
The drag coefficient CD=48/R for a spherical bubble in a uniform streaming flow at high Reynolds number, which was first obtained via a dissipation method by Levich [Zh. Eksp. Teor. Fiz. 19, 18 (1949)], is rederived here by direct integration of the normal stress over the bubble surface. The present study also shows t…
Fluid Dynamics and MixingUltrasound and Cavitation PhenomenaParticle Dynamics in Fluid Flows
Joseph P. Heremans、C. H. Olk、G. L. Eesley 等 5 位作者1988-02-01Physical Review Letters
We report the temperature dependence of the electrical resistivity of carbon at atmospheric pressure and temperatures up to and above the melting point at 4450\ifmmode\pm\else\textpm\fi{}100 K. Vapor-grown graphite fibers of different crystalline perfection were heated with 28-\ensuremath{\mu}sec electrical pulses. We…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis
Kenjiro Meguro、Makoto Torizuka、Kunio Esumi1988-02-01Bulletin of the Chemical Society of Japan
Abstract Platinum particles were prepared by reducing the hydrogen hexachloroplatinate extracted in organic solvents from an aqueous solution by these extractants:dioctadecyldimethylammonium chloride(DDAC), trioctylmethylammonium chloride(TMAC), and trioctylphosphine oxide(TOPO). The extraction ratio of platinum(IV) i…
Gold and Silver Nanoparticles Synthesis and Applications
Philippe Dagaut、Michel Cathonnet、JC Boettner1988-02-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExperimental study and kinetic modeling of propene oxidation in a jet stirred flow reactorP. Dagaut, M. Cathonnet, and J. C. BoettnerCite this: J. Phys. Chem. 1988, 92, 3, 661–671Publication Date (Print):February 1, 1988Publication History Published online1 May 2002Published…
Catalytic Processes in Materials Science
J.E. Stamhuis1988-02-01Polymer Composites
Abstract Using the concept of filler coating, a study has been made of the morphology and mechanical properties of polypropylene/talc/elastomer composites with a series of polar components as added elastomers. Both impact strength and stiffness of the blends were better than those of polypropylene homopolymer. Most of…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesFiber-reinforced polymer composites
S.P. Lynch、P. Trevena1988-02-01CORROSION
Metallographic and fractographic observations of crack growth in pure magnesium in dry air, aqueous, and liquid alkali metal environments are described. Crack growth in dry air at ambient temperatures was macroscopically brittle and occurred parallel to {101¯ X} planes or along grain boundaries, but fracture surfaces…
Corrosion Behavior and InhibitionMagnesium Alloys: Properties and ApplicationsHydrogen embrittlement and corrosion behaviors in metals
Harvey Checkoway、Neil Pearce、Douglas Crawford‐Brown 等 4 位作者1988-02-01American Journal of Epidemiology
A historical cohort mortality study was conducted among 6,781 white male employees from a nuclear weapons materials fabrication plant for the years 1947-1979. Exposures of greatest concern are alpha and gamma radiation emanating primarily from insoluble uranium compounds. Among monitored workers, the mean cumulative a…
Risk and Safety AnalysisGraphite, nuclear technology, radiation studiesChemical Safety and Risk Management