Materials Literature
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Using either normal formic acid in H 2 18 O or 18 O‐labeled formic acid in H 2 16 O , the following results were obtained: the oxygen atoms of formic acid are homogeneously exchanged with water; the strongly bound intermediate however does not exchange oxygen with water; the 18 O‐labeled intermediate is oxidized in H…
Abstract The humidity sensitivities of SrSnO3 and BaSnO3 were enhanced slightly By means of calcining their hydroxides, which were prepared by a coprecipitation method. The partial substitution of the A site element of the perovskite-type oxides with lanthanum was more useful for the enhancement of the sensitivity. Th…
Azospirillum brasilense Cd was grown in ammonium–malate mineral salts medium in batch culture and in chemostat continuous culture. It was found that poly-β-hydroxybutyrate synthesis was favored under oxygen limitation in chemostat culture and under high C/N ratios towards the end of exponential growth in batch culture…
Abstract The tensile crazing and Charpy impact behavior of polypropylene modified with styrene‐butadiene copolymer (SBR) and ethylene‐propylene‐diene monomer (EPDM) was studied. Various rubber particle size distributions were obtained by varying the relative viscosities between rubbery phase and PP matrix. Transmissio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrodynamic and thermodynamic behavior of short-chain polystyrene in toluene and cyclohexane at 34.5.degree.CKlaus Huber, Siegfried Bantle, Pierre Lutz, and Walther BurchardCite this: Macromolecules 1985, 18, 7, 1461–1467Publication Date (Print):July 1, 1985Publication Hist…
The ADAGE computer graphics system has been used to develop a modified Devonshire form for the elastic Gibbs function to describe the simple proper ferroelectric phases in the PbZrO3:PbTiO3 family of crystalline solid solutions. The unusual morphotropic phase boundary between tetragonal and rhombohedral forms has been…
The surface flashover of Teflon, plexiglass, quartz, Pyrex glass, Macor glass-ceramic, and sapphire solid insulators has been measured in vacuum (∼10−8 Torr, ∼10−6 Pa) and in atmospheric air using dc, ac (60 Hz), and 1.2/50-μsec lightning impulse voltages. The dependence of the flashover voltage on the following param…
The material response to rolling contact loading has been analyzed using quantitative X-ray diffraction methods. This has led to the discovery of preferred crystalline orientation in very narrow subsurface regions of endurance-tested 6309 deep groove ball bearing inner rings. The high hydrostatic pressure field, deriv…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInternal surface reversed-phase silica supports for liquid chromatographyI. Helene. Hagestam and Thomas C. PinkertonCite this: Anal. Chem. 1985, 57, 8, 1757–1763Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985ht…
The conjugated polymers polyacetylene (PA) and poly(p‐phenylene) (PPP) have been examined for their possible use as negative electrode materials in nonaqueous secondary batteries. Cathodically stable electrolytes have been identified which allow high reduction levels for these polymers, and charge‐storage capacities o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of interstitial palladium-carbon phase by interaction of ethylene, acetylene, and carbon monoxide with palladiumS. B. Ziemecki, G. A. Jones, D. G. Swartzfager, R. L. Harlow, and J. Faber Jr.Cite this: J. Am. Chem. Soc. 1985, 107, 15, 4547–4548Publication Date (Prin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal and oxidative degradation of poly(methyl methacrylate): weight lossT. Hirata, Takashi Kashiwagi, and J. E. BrownCite this: Macromolecules 1985, 18, 7, 1410–1418Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July…
The empirical scaling law σ(ω, T)/σ(0, T)=f[Aω/σ(0, T)] is implied for a.c. conductivities calculated in the extended pair approximation (EPA) for a variety of models in parameter ranges that are typical experimentally. The number A depends upon the model considered; ω and σ represent frequency and conductivity, respe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-purity, monodisperse TiO2 powders by hydrolysis of titanium tetraethoxide. 1. Synthesis and physical propertiesEric A. Barringer and H. Kent BowenCite this: Langmuir 1985, 1, 4, 414–420Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLight-induced excited-spin-state trapping in iron(II) spin-crossover systems. Optical spectroscopic and magnetic susceptibility studyS. Decurtins, P. Gutlich, K. M. Hasselbach, A. Hauser, and H. SpieringCite this: Inorg. Chem. 1985, 24, 14, 2174–2178Publication Date (Print):…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetailed molecular structure of a vinyl polymer glassDoros N. Theodorou and Ulrich W. SuterCite this: Macromolecules 1985, 18, 7, 1467–1478Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985https://pubs.acs.org/doi…
A new method is described for preparing colloidal gold particles in any size between approximately 3 and 17 nm for electron microscopy. The gold particles are homogeneous in size (homodisperse). When bound to various proteins (e.g. IgG and protein A), the complexes were stable for long periods and suitable for affinit…
Preface 1. What is phytoplankton? 2. Mechanisms of suspension 3. Spatial and temporal distribution of phytoplankton 4. Photosynthetic activity of phytoplankton 5. Nutrients 6. Growth and survival 7. Loss process 8. Periodicity and change in phytoplankton composition Glossary and symbols References Index to lakes and r…
In 1978 it was discovered, largely through the work of Fleischmann, Van Duyne, Creighton, and their coworkers that molecules adsorbed on specially prepared silver surfaces produce a Raman spectrum that is at times a millionfold more intense than expected. This effect was dubbed surface-enhanced Raman scattering (SERS)…
The literature data on the kinetic and thermodynamic characteristics of the polycondensation of aromatic diols, diamines, tetramines, and their derivatives with tetracarboxylic acid dianhydrides and dicarboxylic acid dihalides in amide solvents are surveyed. Attention is concentrated on the analysis of the dependence…