Materials Literature
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Abstract The oxygen reduction characteristics of metalloporphyrins adsorbed at monolayer levels on a high surface area carbon, Norit BRX, have been studied in 8 N H 2 SO 4 and also in 6N KOH. In an acid, oxygen reduction activity is found to be correlated with the Me II /Me III redox potential. Most Co complexes have…
Blood compatibility has been studied for hydrophilic polymers such as poly(vinyl alcohol) (PVA), its derivative, and polyethylene grafted with water-soluble monomers. The surfaces in contact with electrolyte solutions have been characterized by measuring the zeta potentials. The study of plasma protein adsorption on t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical characterization of hydrous ferric oxides by x-ray photoelectron spectroscopyDavid T. Harvey and Richard W. LintonCite this: Anal. Chem. 1981, 53, 11, 1684–1688Publication Date (Print):September 1, 1981Publication History Published online1 May 2002Published inissue…
Initial results in over 50 patients with stroke suggest that positron images made during continuous inhalation of carbon dioxide labeled with oxygen 15 and molecular oxygen labeled with oxygen 15 provide data on tissue function that may be relevant to acute stroke management. Five cases illustrate the following findin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe nature of organosilane to silica-surface bondingThomas G. Waddell, Donald E. Leyden, and Mary T. DeBelloCite this: J. Am. Chem. Soc. 1981, 103, 18, 5303–5307Publication Date (Print):September 1, 1981Publication History Published online1 May 2002Published inissue 1 Septem…
Examples are given of recent abuses or debatable applications of the R-factor ratio test (\cal R) for the assignment of absolute configuration, and it is shown that some of the enhanced ratios that have been used do not necessarily imply a statistically significant reduction in α, the probability of making a wrong ass…
A complete list of (3 + 1)-dimensional superspace groups is presented. These groups describe the symmetry of incommensurate crystal structures with a one-dimensional modulation. A short discussion is given of applications. Extinction rules and Bravais types are tabulated in order to facilitate the determination of the…
"Experimental High-resolution Electron Microscopy." Optica Acta: International Journal of Optics, 28(9), p. 1173
The new edition of this practical microscopy guide includes additional material on high-resolution images of periodic structures and associated techniques. It provides both a view of the fundamental principles of electron microscopy and detailed practical information needed to record the images. Various theoretical re…
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This review deals with the following subjects: general characteristics of TL materials (including: LiF; Li 2 B 4 O 7 ; BeO); TL dose response and TL models (including: dependence of f(D) on impurity composition; supralinearity of individual glow peaks); ionising radiation dosimetry (including: dose response; cavity th…
Equilibrium electrical conductivity data for large‐grained, poly crystalline, undoped BaTiO 3 , as a function of temperature, 750° to 1000°C, and oxygen partial pressure, 10 −20 < P O2 <10 −1 MPa, were quantitatively fit to a defect model involving only doubly ionized oxygen vacancies, electrons, holes, and acci…
The crystallization and melting of adsorbed water on cellulose samples such as cotton, kapok, linen, jute, various rayons, and wood cellulose have been studied using a differential scanning calorimeter (DSC). Two exothermic peaks of crystallization of adsorbed water on the cellulose samples are observed. One is a shar…
Recent developments in thin film technology have made possible the construction of multilayered thin film structures that act as efficient Bragg diffractors for x rays and extreme ultraviolet (EUV) radiation. These structures (which we term layered synthetic microstructures or LSMs) are analogous to multilayer interfe…
An examination is made of the sharp‐indentation technique of strength‐test precracking for toughness evaluation. The experimental approach follows that proposed by other workers but the theoretical analysis contains one vital new feature; the residual‐stress term discussed in Part I of this study is now introduced exp…