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Información sobre Congresos y Seminarios. Noticias
Improvement of Wettability of SiC and Al2O3 Particles by Molten Aluminum
A Conductive and Humidity‐Sensitive Composite Film Derived from Poly(o‐phenylenediamine) and Polyvinyl Alcohol
Electrically conducting composite films have been prepared from the polymer solution of conducting poly o‐phenylenediamine (PoPD) and nonconducting polyvinyl alcohol (PVA). This composite film showed a very low value of the percolation threshold (0.1 volume percent of the PoPD content) where the conductivity rose shar…
Effect of Morphology of Polyaniline on Its Discharge Characteristics in Nonaqueous Electrolyte
The discharge and charge performance of polyaniline which has a fibrous morphology was investigated from microscopic current density and anion diffusion time constant measurements. The microscopic discharge current density is calculated from the radius of the polyaniline fibril, assuming the true electrode surface are…
Definition of clay and clay mineral: joint report of the AIPEA and CMS Nomenclature Committees
Abstract The definition of ‘clay’ was first formalized in 1546 by Agricola. It has been revised many times since, although the fundamentals involving plasticity, particle size, and hardening on firing were retained by most. For an exhaustive account of the history of the definition to 1963, the reader is referred to M…
Información Bibliográfica
Raman Spectra of Vateritic Calcium Carbonate
The Raman spectrum of polycrystalline vaterite is presented and compared to spectra of calcite and aragonite, the other two common CaCO3 polymorphs; Raman spectroscopy easily distinguishes between these three polymorphs. An important feature of the Raman spectrum of vaterite is splitting of both the ν1 and ν4 peaks. T…
Potential-Dependent Electron Injection in Nanoporous Colloidal ZnO Films
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPotential-Dependent Electron Injection in Nanoporous Colloidal ZnO FilmsP. Hoyer and H. WellerCite this: J. Phys. Chem. 1995, 99, 38, 14096–14100Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://…
A Real-Time Simultaneous Small- and Wide-Angle X-ray Scattering Study of In-Situ Deformation of Isotropic Polyethylene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Real-Time Simultaneous Small- and Wide-Angle X-ray Scattering Study of In-Situ Deformation of Isotropic PolyethyleneMichael F. Butler, Athene M. Donald, Wim Bras, Geoffrey R. Mant, Gareth E. Derbyshire, and Anthony J. RyanCite this: Macromolecules 1995, 28, 19, 6383–6393Pu…
Molecular Structure and Magnetic Properties of Acetato-Bridged Lanthanide(III) Dimers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Structure and Magnetic Properties of Acetato-Bridged Lanthanide(III) DimersAthanassios Panagiotopoulos, Theodoros F. Zafiropoulos, Spyros P. Perlepes, Evangelos Bakalbassis, Isabelle Masson-Ramade, Olivier Kahn, Aris Terzis, and Catherine P. RaptopoulouCite this: I…
Protein-Sized Quantum Dot Luminescence Can Distinguish between "Straight", "Bent", and "Kinked" Oligonucleotides
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProtein-Sized Quantum Dot Luminescence Can Distinguish between "Straight", "Bent", and "Kinked" OligonucleotidesRahina Mahtab, Jessica P. Rogers, and Catherine J. MurphyCite this: J. Am. Chem. Soc. 1995, 117, 35, 9099–9100Publication Date (Print):September 1, 1995Publication…
A database on electron‐solid interactions
Abstract Monte Carlo modeling of electron‐solid interactions requires a detailed and accurate supply of experimental data on which to base its physics and against which to test its predictions. To meet this need, a collection of data—comprising measurements of secondary and backscattered electron yields, electron stop…
Infrared absorption by the B nitrogen aggregate in diamond
Two approaches have been adopted in attempting to determine the strength of the one-phonon infrared absorption by the B nitrogen aggregate in diamond. On the one hand, we have heat treated purely type IaA specimens with known infrared absorption strengths (and thus also known nitrogen concentrations) to bring about pa…
Studies on Jute Composites—A Literature Review
Jute fiber is an important agricultural product. It is one of the most common natural fibers in Third World countries such as India, China, Bangladesh, etc. The jute industry has special importance in the economy of India and continues to be a major traditional earner of foreign exchange. However, it is facing tough c…
Reconciling ionic-transport properties with atomic structure in oxide glasses
Structural evidence for the microsegregation of alkalis in oxide glasses is reviewed and the implications for ionic transport, viz., nearest-neighbor hopping, cooperative and correlation effects, are considered. Distinctions are drawn between the hopping of alkalis in silicate glasses, where changes in the configurati…
Biosynthetically Directed Fractional 13C-labeling of Proteinogenic Amino Acids. An Efficient Analytical Tool to Investigate Intermediary Metabolism
Biosynthetically directed fractional 13C labeling of proteinogenic amino acids is achieved by expression of proteins on a minimal medium which contains a mixture of [13C6]glucose and glucose with natural isotope abundance as the sole carbon source. Subsequent hydrolysis of the proteins yields the free amino acids. The…
Probing molecular interactions with homogeneous techniques based on rare earth cryptates and fluorescence energy transfer
A homogeneous assay method based on the long-lived fluorescence of rare earth cryptates and amplification by nonradiative energy transfer has been developed for immunoassays. The principles of the assay allow a double discrimination of the emitted signal through spectral and temporal selectivity. The cage structure of…
Preparation of Rodlike Gold Particles by UV Irradiation Using Cationic Micelles as a Template
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Rodlike Gold Particles by UV Irradiation Using Cationic Micelles as a TemplateKunio Esumi, Keiichi Matsuhisa, and Kanjiro TorigoeCite this: Langmuir 1995, 11, 9, 3285–3287Publication Date (Print):September 1, 1995Publication History Published online1 May 2002P…