Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium adsorption of polycyclic aromatic hydrocarbons from water onto activated carbonRichard W. Walters and Richard G. LuthyCite this: Environ. Sci. Technol. 1984, 18, 6, 395–403Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Publishe…
Abstract The mechanical properties of a variety of immiscible binary blends, with and without third component polymeric compatibilizers, are reviewed and qualitatively related to the degree of adhesion between blend components as determined by lap shear testing. Generally, blends comprised of components which adhere w…
Abstract Results of an investigation on the morphology, the crystallization and the thermal behavior of several binary crystallizable blends are reported. The composition, molecular mass and crystallization conditions strongly influence the crystallization and the thermal behavior as well as the overall morphology of…
SUMMARY Samples of six soils were incubated at 60°C for 24 h with several levels of either calcium carbonate or hydrochloric acid. Phosphate sorption was then measured on sub‐samples of the treated soils over 24 h at 25°C. In one set of measurements on all soils, 0.01 M calcium chloride was used as the background elec…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon gate electrodes. Polypyrrole as a switchable ion conductor membranePaul Burgmayer and Royce W. MurrayCite this: J. Phys. Chem. 1984, 88, 12, 2515–2521Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June 1984https://p…
Abstract On the basis of the extended Hückel molecular orbital calculation, the intermolecular overlaps of the highest occupied molecular orbitals are calculated for α-(BEDT-TTF)2I3 reported by Bender et al., and for superconducting β-(BEDT-TTF)2I3 reported by Yagubskii et al. (BEDT-TTF: bis(ethylenedithio)tetrathiafu…
Modern physicochemical biology steadily enriches our knowledge of the functional role of proteins and their elements-amino acids and peptides. These substances are involved in all essential molecular processes occurring in the living cell and perform key regulatory functions at the cellular and organismic levels. Thei…
Abstract Atomic standards of binding energies are presented for the calibration of X‐ray photoelectron spectrometers. The binding energies are measured using a VG Scientific ESCA 3 Mk II for which the photoelectron peak positions can be established with a measurement precision standard deviation of 5 meV. The absolute…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of stress-induced phase separations in polymer solutionsC. Rangel-Nafaile, A. B. Metzner, and K. F. WissbrunCite this: Macromolecules 1984, 17, 6, 1187–1195Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June 19…
Oxygen-derived free radicals have been proposed as general mediators of tissue injury in a variety of disease states. Recent interest has focused on the possibility that free radicals may be involved in ischemic myocardial damage. However, the exact types of damage that result from myocardial exposure to free radicals…
A great deal of information exists on the retraction occurring in pastes, mortars and concrete, twenty-four hours after being mixed; we have very little information, however, concerning the volumetric changes which take place in a shorter period of time, this being mainly due to the difficulties which arise in measuri…
The energy crisis and subsequent retraction of sales on the market have demanded a greater exigency in the productive aspect of cement, requiring lower production costs and making the quality of the product more appropriate to the nature of its use in construction. This article focuses on the perspectives which should…
The petrography and physical properties of the building stones used in the construction of the Revillagigedo Palace (Gijón, Spain), 1699-1711, are studied. The physical properties more closely related to the state of alteration and to the alterability processes of these Uper Jurassic sandstones are quantified, namely:…
This study attempts to show the differences found between average resistance, after 28 days, obtained in the laboratory and that predicted when the C/A relationship has been calculated using the general De la Peña formula. This difference is considered to be sufficient to justify modifying the content of the formula,…
In this study, which follows on from others, the pH variation is examined and also that of the concentration of Ca (II) and SO4 (II) ions in the mediums (filtered potable water) in which the test samples of mortar (1: 3) made with industrial portland cement resistent to gypsum (cement 2 < > P-450-Y) and with the mixtu…
In the work we are presenting, we have set ourselves the target of determining a practical method for ascertaining the dosage of fibrous concrete. To do this, as in any problem regarding dosage, we shall start from the possibilities of supply, which will be conditioned by the nature of the aggregates to be used, of ce…
An algorithm to solve systems of linear homogeneous diophantine equations is given here. Subsequently, as an example of application, a method of heuristic search for the best solution is described; this fulfils certain conditions within an infinite space of solutions of various dimensions. Finally, an application of t…
V prĂĄci je struÄnÄ shrnut vĂ˝znam jednotlivĂ˝ch kovĹŻ, tj. Al, As, Cd a Pb z hlediska pivovarskĂŠho a zĂĄroveĹ je poukĂĄzĂĄno na pĹĂpadnĂŠ ĹĄkodlivĂŠ zdravotnĂ efekty. Koncentrace uvedenĂ˝ch 4 prvkĹŻ byly mÄĹeny v 31 vzorku 12%, 10% a 8% piva dostupnĂŠho na ÄeskoslovenskĂŠm trhu (celkem bylo p…
The levels of seven intermediary enzymes involved in acetate and butyrate formation from acetyl coenzyme A in the saccharolytic anaerobe Clostridium acetobutylicum were investigated as a function of time in solvent-producing batch fermentations. Phosphate acetyltransferase and acetate kinase, which are known to form a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOctahedral vs. trigonal-prismatic coordination and clustering in transition-metal dichalcogenidesMiklos Kertesz and Roald HoffmannCite this: J. Am. Chem. Soc. 1984, 106, 12, 3453–3460Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published…