Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of silica supported chromium ions. III. Two-ligand complexes. Nitric oxide adsorptionA. Zecchina, E. Garrone, C. Morterra, and S. ColucciaCite this: J. Phys. Chem. 1975, 79, 10, 978–983Publication Date (Print):May 1, 1975Publication History Published online1 May 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear magnetic resonance spectroscopy. XIII. Amidines. VII. Proton and carbon-13 nuclear magnetic resonance studies on the tautomerism, geometrical isomerism, and conformation of some cyclic amidines, guanidines, and related systemsLloyd M. Jackman and Timothy JenCite this…
Abstract The transport behavior of O 2 and N 2 were studied for series of physical blends of PVC with EVA having different vinyl acetate (VAc) contents in the EVA (45 and 65 wt‐%) and using different milling temperatures (160° and 185°C). The polymer blends were further characterized by dynamic mechanical measurements…
Pyridoxamine (pyridoxine) 5'-phosphate oxidase (EC 1.4.3.5) has been purified 2000-fold from rabbit liver. The enzyme preparation migrates as a single protein and activity band on analytical disc gels containing 4,7, or 9 percent acrylamide, and as a single protein band on sodium dodecyl sulfate acrylamide gels. The o…
Collagen has been prepared from steer glomerular basement membrane by controlled pepsin solubilization. Four collagen polypeptides of potential alpha chain size have been isolated following denaturation and reduction with mercaptoethanol. Purification was obtained through sequential chromatography by gel filtration on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimple cell model treatment of surface tension expansionY. TamaiCite this: J. Phys. Chem. 1975, 79, 10, 965Publication Date (Print):May 1, 1975Publication History Published online1 May 2002Published inissue 1 May 1975https://pubs.acs.org/doi/10.1021/j100577a004https://doi.or…
Abstract Neutral to alkaline soils from several climatic and physiographic locations were studied. The clay mineralogy of these soils was characterized by interstratified mixtures of mica, montmorillonite and little vermiculite. X‐ray diffraction patterns for the most abundant clay fraction, < 0.2 µm, were composed…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImproved Capillary Method for Diffusivity MeasurementsC. Y. Luk, L. Nanis, and M. LittCite this: Ind. Eng. Chem. Fundamen. 1975, 14, 2, 92–95Publication Date (Print):May 1, 1975Publication History Published online1 May 2002Published inissue 1 May 1975https://pubs.acs.org/doi…
Charging effect induced by an analyzing electron beam of a SEM has been observed on the cleaved surface of a silicon wafer. It was ensured that this is due to the formation of an oxide layer on the silicon surface. Using this effect, two new applications of the electron-beam-induced-current (EBIC) mode are performed.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTotally symmetric metal-nitrogen stretching vibrations of ethylenediamine chelate complexesC. D. Flint and A. P. MatthewsCite this: Inorg. Chem. 1975, 14, 5, 1219–1220Publication Date (Print):May 1, 1975Publication History Published online1 May 2002Published inissue 1 May 19…
Abstract The influence of chemical groups regularly spaced along a polymer chain on structure and behaviour of chain folded single crystals was studied on linear aliphatic polyesters with different lengths of repeating unit. Poly(oxytetramethyleneoxysebacoyl) (or polyester 4,10), poly(oxyhexamethyleneoxysebacoyl) (or…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Dynamics of Block-Copolymer Molecules in Solution. The Free-Draining LimitF. W. Wang and E. A. DiMarzioCite this: Macromolecules 1975, 8, 3, 356–360Publication Date (Print):May 1, 1975Publication History Published online1 May 2002Published inissue 1 May 1975https://pubs.…
This study reports on measurements with multiple techniques delineating the complete sequence of events from the corona streamer to the arc phase in the spark transition for large rod-to-plane air gaps applied by positive switching impulses. Observations with a image converter camera, photomultipliers, a Boys camera,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSeparation of organic sulfides from aromatic concentrates by ligand exchange chromatographyJames W. Vogh and James E. DooleyCite this: Anal. Chem. 1975, 47, 6, 816–821Publication Date (Print):May 1, 1975Publication History Published online1 May 2002Published inissue 1 May 19…
Abstract An adiabatic heat capacity study of poly(diethylsiloxane) confirms that it has a single glass transition occurring at 130°K, the lowest glass transition reported to date for a high molecular weight polymer. The two previously reported glass transitions are first‐order thermodynamic peaks whose location is dep…
Abstract Total thermal analysis provides a reasonably accurate method for the identification of the polymers in tire treads or black sidewalls. DSC curves in nitrogen distinguish SBR, BR, or blends from NR or IR. T g then distinguishes between these polymers, although confusion may arise in the case of blends of SBR/B…
Efficiencies of Yb 3+ ‐Er 3+ activated up‐conversion phosphors are determined by the efficiency of the excitation process and by that of the final emission process in the Er 3+ ion. The former process is dependent on the infrared excitation density. We measured the efficiency of the emission process by excitation to s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and spectral properties of metal carbonyl derivatives of the tetrabasic, nonchelating phosphatriazaadamantane ligandM. York. Darensbourg and D. DaigleCite this: Inorg. Chem. 1975, 14, 5, 1217–1218Publication Date (Print):May 1, 1975Publication History Published onl…
Abstract A ground rice hull ash prepared by a new burning process has been found to be a moderately reinforcing filler for rubber. This filler, 85-90% amorphous silica and 10-15% carbon, is made by a controlled incineration process in which the bulk of the organic components of the rice hulls is removed, leaving the s…
The oxidation kinetics of a single crystal of SrTiO 3 were measured with a tensivolumetric system over the temperature range 700°–975° at 0.03 atm oxygen pressure. The oxidation was found to be oxygen diffusion limited with an activation energy of 14.9 ± 1.3 kcal / mole . Combining the kinetic data with relative defec…