Materials Literature
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A method, called "protein blotting," for the detection of DNA-binding proteins is described. Proteins are separated on an SDA-polyacrylamide gel. The gel is sandwiched between 2 nitrocellulose filters and the proteins allowed to diffuse out of the gel and onto the filters. The proteins are tightly bound to each filter…
In many biological materials radiation damage limits the resolution of the microanalytical measurement. To provide some perspective regarding the relative merits of different experimental arrangements, the dose to the specimen may be calculated using a simple model. While electron and proton probe X-ray microanalysis…
The Hall coefficient and resistivity of the first-row transition-metal intercalates, M1/3TaS2 (M = V, Cr, Mn, Fe, Co, Ni), Mnl/4TaS2, M1/3NbS2 (M = V, Cr) and Fel/4NbSe2 have been measured as a function of temperature. These intercalation complexes show either ferromagnetic or antiferromagnetic orderings and there are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStoichiometry, structure, and physical properties of niobium disulfideWayne G. Fisher and M. J. SienkoCite this: Inorg. Chem. 1980, 19, 1, 39–43Publication Date (Print):January 1, 1980Publication History Published online1 May 2002Published inissue 1 January 1980https://pubs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPicosecond laser photophysics. Group 3A phthalocyaninesJames H. Brannon and Douglas MagdeCite this: J. Am. Chem. Soc. 1980, 102, 1, 62–65Publication Date (Print):January 1, 1980Publication History Published online1 May 2002Published inissue 1 January 1980https://pubs.acs.org…
Correlation properties of a long polymer in a good solvent are studied with the help of renormalization techniques. The probability distribution of the vector r joining, in a space of dimension d, the end points of a polymer segment made of N links, is a function Ps,N(r), where s is an index referring to various situa…
By calculating the value of the unknown oxygen positional parameter x for a large number of A3+2B4+2O7 pyrochlores, it was determined that increasing the radius of the A cation in a series of constant B increased the value of x, and that increasing the radius of the B cation in a series of constant A decreased the val…
Metal-free and ZnTPP complexes exhibit both fluorescence and low temperature phosphorescence, MnIITPP shows only low temperature phosphorescence while NiIITPP is non-luminescent. The absorption spectra show that there is little interaction between the metal and the porphyrin π-system so that the excited states can be…
The first and basic step in gas release is single gas atom diffusion. The lattice location of rare gas atoms in the UO2 lattice and the mechanism of this diffusion process are discussed. Trapping of single gas atoms is important for out-of-pile laboratory work and helps to explain much of the scatter in the reported d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdered Phase Formation in Concentrated Hydroxpropylcellulose SolutionsRita S. Werbowyj and Derek G. GrayCite this: Macromolecules 1980, 13, 1, 69–73Publication Date (Print):January 1, 1980Publication History Published online1 May 2002Published inissue 1 January 1980https://…
Available data on the refractive index and its temperature derivative for alkaline earth halides were exhaustively surveyed, compiled, and analyzed. The most probable values of the refractive index at 293 K for the transparent region were generated for the materials for which experimental data were sufficiently abunda…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic exchange in transition metal complexes. 12. Calculation of cluster exchange coupling constants with the X.alpha.-scattered wave methodA. P. GinsbergCite this: J. Am. Chem. Soc. 1980, 102, 1, 111–117Publication Date (Print):January 1, 1980Publication History Publishe…
Abstract A prediction technique for gas permeability from polymer structure has been developed on the basis of a specific free volume diffusion theory. In this theory, the free volume available per unit mass in a polymer structure controls the rate of gas diffusion and, hence, its rate of permeation. The smaller this…
The effect of grain orientation on the dielectric properties of hot-forged ferroelectric Bi 4 Ti 3 O 12 ceramics has been investigated and the properties are compared with ordinarily fired ones. The degree of grain orientation f calculated from X-ray diffraction patterns is found to be as large as 0.95. The temperatur…
Preface 1. The structure of particle-hardened alloys 2. Yield and work-hardening in the absence of recovery 3. Mechanisms of fracture in two-phase materials 4. Micromechanisms at elevated temperatures References Index.
The concept of appropriately combining two or more different polymers to obtain a new material system with the desirable features of its constituents is not new. Over the years, numerous systems based on the chemical combination of different monomers through random, block, and graft copolymerization methods have been…
Superconductivity has been observed by resistive measurements in the quasi-one dimensional organic conductor di-(tetramethyltetraselenafulvalene)-hexafluorophosphate, (TMTSF)2PF6 under a hydrostatic pressure of 12 kbar with a transition temperature of 0.9 K. The effect of magnetic fields perpendicular to the chain axi…
Several common modes of crystal growth provide particularly simple and elegant examples of spontaneous pattern formation in nature. Phenomena of interest here are those in which an advancing nonfaceted solidification front suffers an instability and subsequently reorganizes itself into a more complex mode of behavior.…
Abstract In the years 1930—1950 clay mineral identification involved mainly a combination of X-ray powder diffraction and chemical analysis with some assistance from other techniques, notably differential thermal analysis. In the period 1950—1970 additional procedures have emerged including infrared analysis, electron…
Abstract We extend a method devised by Lord Rayleigh to enable the calculation of the transport properties of circular cylinders in square and hexagonal arrays. The theory is confirmed by measurements on arrays of perfectly conducting cylinders, and also is compared with asymptotic formulae due to Keller (1963) and O’…