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Abstract Fourier‐transform infrared (FTIR) studies of the poly(ϵ‐caprolactone) (PCL)–poly(vinyl chloride) (PVC) blend system are presented. The results indicate that there are specific interactions between the PCL and PVC in both the molten and solid states which could be responsible for the apparent compatibility of…
Calcium ion plays an essential role in many biological processes. The environment about Ca 2+ may be probed by substitution of tripositive lanthanide ions, Ln 3+ . Ca 2+ proteins fall into two broad classes: those that are inhibited by Ln 3+ substitution and those that are not. It is suggested that although Ca 2+ unde…
Microstructural development during aging of supersaturated solid solutions of cubic ZrO, stabilized with MgO was studied, principally using transmission electron microscopy. The starting materials were commercial Mg‐PSZ, solution‐annealed at 1850°C for 4 h. Optimum mechanical properties are obtained at aging temperatu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman and ultraviolet spectroscopic characterization of molybdena on alumina catalystsHelge. Jeziorowski and Helmut. KnoezingerCite this: J. Phys. Chem. 1979, 83, 9, 1166–1173Publication Date (Print):May 1, 1979Publication History Published online1 May 2002Published inissue…
A rigorous theoretical formalism describing the diffraction of a P polarised plane wave by a perfectly conducting double grating is presented. The use of such structures as long wavelength Fabry-Perot interferometers is investigated and the individual effects of the design parameters are determined. In particular, it…
Clay Mineral Catalysis and Petroleum Generation, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/earth/7/1/annurev.ea.07.050179.001151-1.gif
The single-crystal elastic moduli C ij and their pressure derivatives dC ij /dP have been measured ultrasonically at 25 degrees C for six Ti-V-Cr, eight Nb-Mo and seven Ta-W solid solutions. The rigid-band model for the alloy electronic structure is known to work fairly well for these BCC metals in predicting the dens…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA molecular orbital study of strong metal-support interaction between platinum and titanium dioxideJ. A. HorsleyCite this: J. Am. Chem. Soc. 1979, 101, 11, 2870–2874Publication Date (Print):May 1, 1979Publication History Published online1 May 2002Published inissue 1 May 1979…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeconvolution of fluorescence decay curves. A critical comparison of techniquesD. V. O'Connor, W. R. Ware, and J. C. AndreCite this: J. Phys. Chem. 1979, 83, 10, 1333–1343Publication Date (Print):May 1, 1979Publication History Published online1 May 2002Published inissue 1 Ma…
Abstract not Available.
The changes in the properties of copolymers as a function of the introduction of units with carboxy- and salt groups into the macrochain are examined. Attention is concentrated on the analysis of the results of the study of copolymers in the acid and ionomeric forms in solutions. The decisive influence of ionic intera…
The quenching by an electric field of molecular-orientation fluctuations in freely suspended ferroelectric smectic-$C$ films has been studied by light scattering, allowing absolute measurements of polarization, elastic constants, and viscosities. Evidence is presented to demonstrate surface contributions to Frank elas…
Preface 1. Background to ceramics 2. Elastic behaviour 3. Fundamentals of fracture chemicals 4. Geometrical aspects of dislocations 5. The flow stress and plastic flow 6. The fracture strength of ceramics 7. Impact resistance and toughness 8. Thermal stresses and fracture in ceramics 9. Engineering design data Referen…
Optical and EPR measurements of tetragonal symmetry erbium-fluoride, erbium-hydride, erbium-deuterium and erbium-tritium ion pairs in calcium fluoride are reported. A crystal-field analysis accounts for the observed 4f 11 multiplet splittings and for the g-values obtained by EPR and Zeeman spectroscopy. The isotope sh…
The intensity of the exciton-magnon combination band at 631 nm in the ionic ferromagnet Rb 2 CrCl 4 has been measured as a function of temperature from 0.85 to 3.6K and as a function of magnetic field (up to 5 T in the (100) direction) at temperatures from 2.1 to 4.2K. The zone-centre magnon gap is estimated as 1.4+or…
The Auger electrons and the X-rays emitted in XPS are treated in a unified manner with the photoelectrons as a one-step process, without distinguishing between primary photoionisation and secondary Auger and X-ray emission. Such a formulation will be capable of treating relaxation and interference effects in a consist…
High-resolution M 4,5 N 4,5 N 4,5 Auger and M 5 and valence-band photoelectron spectra of Ag, Cd, In and Sn, measured using X-ray excitation, are combined to yield the magnitude of U eff , the Coulomb repulsion between two holes on the same atomic site. The extra-atomic relaxation contributions to Auger and photoelect…
At low temperatures, low dimensional metals are commonly found to exhibit superlattices incommensurate with the primitive lattice (periodic lattice distortion coupled to charge density waves, PLD — CDW). Transitions to such states are driven by strong electron phonon coupling and favoured by the particular forms of th…
The structural phase transitions occurring in PbZrO 3 have been investigated using X-ray diffraction and dielectric constant measurements. The lattice parameters, Pb ion displacements and ZrO 6 octahedral tilts in the antiferroelectric, orthorhombic phase have been determined as functions of temperature between 20 and…
Space-filling models of yeast hexokinase, adenylate kinase, and phosphoglycerate kinase drawn by computer clearly portray the bilobal character of these phosphoryl transfer enzymes, and the deep cleft which is formed between the lobes. A dramatic conformational change occurs in hexokinase as glucose binds to the botto…