Materials Literature
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The elastic behavior of a weakly aggregating polystyrene latex dispersion was investigated using a homemade controlled stress rheometer and commercially available dynamic rheometers. Both the creep measurements and the oscillatory experiments show the absence of a yield stress. The low-shear-limiting viscosity obtaine…
The structure of the histidine-binding protein (HBP, M(r) = 26,100), involved solely in active transport, has been determined by the molecular replacement technique and refined to 1.89-A resolution and to an R-factor of 0.199. The structure is that of two protein molecules, each with a bound L-histidine, in the asymme…
Abstract Hydroxyl radicals were generated radiolytically in N 2 O‐ or N 2 O/O 2 (4:1)‐saturated aqueous solutions of poly(vinyl alcohol) (PVAL) or its low‐molecular‐weight model compound pentane‐2,4‐diol (PD). Using the pulse radiolysis technique, the rate constant of OH with PD and PVAL has been determined to be 2,3…
PURPOSE: To investigate the utility of a monocrystalline iron oxide nanoparticle (MION) as a contrast agent in magnetic resonance (MR) imaging of lymph nodes. MATERIALS AND METHODS: Pharmacokinetic data were obtained in rats after intravenous, subcutaneous, and intraarterial injection of indium-111-MION-46. MR imaging…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain Pullout Fracture of Polymer InterfacesJunichiro Washiyama, Edward J. Kramer, Costantino F. Creton, and Chung-Yuen HuiCite this: Macromolecules 1994, 27, 8, 2019–2024Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1…
DC arc evaporation of nickel-graphite composite in helium atmosphere produces single-wall (SW) nanotubes. Electron microscopy examination of carbonaceous soot synthesized by this method revealed that the SW tubes grew radially from ultrafine nickel particles, and that they were found exclusively in soot material forme…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComposite of Colloidal Crystals of Silica in Poly(methyl methacrylate)Hari Babu Sunkara, Jagdish M. Jethmalani, and Warren T. FordCite this: Chem. Mater. 1994, 6, 4, 362–364Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Block Structure on the Micellization and Gelation of Aqueous Solutions of Copolymers of Ethylene Oxide and Butylene OxideZhuo Yang, Simon Pickard, Nan-Jie Deng, Raymond J. Barlow, David Attwood, and Colin BoothCite this: Macromolecules 1994, 27, 9, 2371–2379Publica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrans-[Ni(333-tet)(.mu.-N3)]n(ClO4)n and cis-[Ni(333-tet)(.mu.-(N3)]n(PF6)n: Two Novel Kinds of Structural Nickel(II) Chains with a Single Azido Bridge. Magnetic Behavior of an Alternating S = 1 chain with .alpha. = 0.46Albert Escuer, Ramon Vicente, Joan Ribas, M. Salah El F…
Journal of physical chemistry
Polarized light induces a preferred orientation of azobenzene groups through photochemical trans-cis-trans processes. Stronger orientation tendencies exist if the azo-containing polymers are crystalline or liquid crystalline and the cooperative reorientation of nonactive mesogens of similar shape has been demonstrated…
The dynamics of the molecular glass-forming liquid orthoterphenyl above the glass-transition temperature was studied combining several experimental techniques: depolarized Raman, depolarized Rayleigh-Brillouin light scattering, and photon correlation spectroscopy in the temperature range from 250 to 440 K. The combine…
Using the replica method, we derive the thermodynamic relations for a fluid in equilibrium with a quenched porous matrix. In particular, the appropriate Gibbs–Duhem equation is obtained as well as the equivalence between grand canonical and canonical ensembles. The exact compressiblity and virial equations are derived…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Apparent .pi.-Allyl Rotation in (.pi.-Allyl)palladium Complexes with Bidentate Nitrogen LigandsAdolf Gogoll, Joergen Oernebro, Helena Grennberg, and Jan-E. BaeckvallCite this: J. Am. Chem. Soc. 1994, 116, 8, 3631–3632Publication Date (Print):April 1, 1994Publica…
High‐resolution electron microscopy and nano‐beam analytical electron microscopy have been used to characterize both the intergranular silicate film thickness and its local composition in a series of high‐purity Si 3 N 4 ceramics doped with 0–450 at. ppm Ca. Calcium was detected at both two‐grain junctions and triple…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerro- and Ferrimagnetic Ordering in a Two-Dimensional Network Formed by Manganese(II) and 1,3,5-Tris[p-(N-tert-butyl-N-oxyamino)phenyl]benzeneKatsuya Inoue and Hiizu IwamuraCite this: J. Am. Chem. Soc. 1994, 116, 7, 3173–3174Publication Date (Print):April 1, 1994Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDensities, Viscosities, Speeds of Sound, and Water Solubilities of Some Polypropylene Glycol Ether Derivatives in the Temperature Range 273.15-323.15 KJohn P. Idoux, Cynthia K. McCurry, and Tejraj M. AminabhaviCite this: J. Chem. Eng. Data 1994, 39, 2, 261–265Publication Dat…
In the present study, the rf plasma chemical vapor deposition technique is applied to directly deposit a diamond-like carbon (DLC) film onto a zinc sulfide (ZnS) substrate with excellent adhesion. Great attention is paid to the investigation of the correlation between the deposition process parameters and the structur…
This paper describes detection and diagnostic techniques for partial discharges in gas insulated substations (GIS). Partial-discharge current waveforms of SF/sub 6/ gas and external noise characteristics of actual substations were investigated, and a measuring system having sensors in GIS and employing frequency range…
The XPS spectrum of the boron suboxide, B6O, is reported. The spectra were obtained on a powder sample that was prepared and characterized at the Diamond Technology Center, Norton Company. It was characterized with x-ray diffraction and was prepared by established methods. The B 1s peak is split into two components of…