Materials Literature
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An explanation is given for the apparent stability of a minor phase in a two‐phase system, such as a glass in a glass ceramic, even though normally the glass would be expected to dissolve completely into the crystalline phase. It is shown that the glass would be stable only if it is segregated to the triple‐junction n…
In order to examine the effect of external noise on the electrohydrodynamic instability, we have measured the wave number spectrum of the pattern of Williams domain in nematic liquid crystals MBBA in the presence of external noise superposed to the a c voltage. The threshold voltage for the onset of Williams domain is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAspects of artificial photosynthesis. Photosensitized electron transfer across bilayers, charge separation, and hydrogen production in anionic surfactant vesiclesMohammad S. Tunuli and Janos H. FendlerCite this: J. Am. Chem. Soc. 1981, 103, 10, 2507–2513Publication Date (Pri…
A dense high‐alumina ceramic has been developed for the immobilization of Savannah River Plant nuclear waste. The ceramic, fabricated by reactive hot‐pressing, consists of four compatible crystalline phases, alumina, spinel, magnetoplumbite, and uraninite. The magnetoplumbite phase can incorporate the elements Cs, Sr,…
An irrigated rotation has supported high crop yields for 66 yr without the benefit of K fertilizer because of the relatively high total K status (14 392 ppm in the 0- to 15-cm layer and 11 183 ppm in the 15-to 30-cm layer) of the soil. This K status, under native conditions, was due to the nature of the parent materia…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the reaction between polyester acid and carbodiimide in dry polyester diols and in a polyester polyurethaneDaniel W. Brown, Robert E. Lowry, and Leslie E. SmithCite this: Macromolecules 1981, 14, 3, 659–663Publication Date (Print):May 1, 1981Publication History P…
The periodic stripe domains of magnetic material whose easy axis is perpendicular to the film thickness may have boundary layer behavior not only in the wall but also near the film surfaces. This behavior is especially pronounced when the material characteristic length is much less than the film thickness. By means of…
In many applications, it is necessary to have permanent magnets whose characteristics vary little around a temperature Tr. We have developed a calculation to describe the thermal variation of the magnetization of the rare earth (RE) in such magnets including the effects of crystalline field. The exchange field of coba…
Formulas associated with simple beam or plate theories are used extensively in structural design, to determine You's modulus, and to determine fracture strength of brittle nonmetallic materials. The question may arise as to whether the proper ratio of beam‐width‐to‐beam‐depth is such that the bent structural element c…
Abstract Results of 13 years of field research throughout Montana have demonstrated a relatively high rate of crop yield response to K fertilization when included in an N‐P‐K fertilizer program. Correlations between crop response to fertilizer K and ammonium acetate‐extractable K have been too low for this method to b…
Abstract When linoleic acid or its esters were heated in the presence of valine a number of interaction products were formed. The major product was 2‐pentylpyridine which is thought to be produced by the reaction of 2,4‐decadienal with ammonia. Also formed were two secondary amides, isobutyloctanamide and isobutyllino…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface analysis of Raney nickel alloysJoseph C. Klein and David M. HerculesCite this: Anal. Chem. 1981, 53, 6, 754–758Publication Date (Print):May 1, 1981Publication History Published online1 May 2002Published inissue 1 May 1981https://pubs.acs.org/doi/10.1021/ac00229a003ht…
Experimental The magnesium hydroxide sulfate hydrate MgSO4.~Mg(OH)2.~H20 crystallizes in the tetragonal space group I4~/amd with cell dimensions al a 2 -- 5.242 (1), c -- 12.995 (3) A, Z -- 4. The structure was solved by Patterson methods and refined to R = 0.041 using 160 single-crystal X-ray diffraction intensities…
Quenching data are presented for reflooding by cold water of zircaloy and stainless steel clad rod bundles. In particular a filling material (Al2O3) with thermophysical properties similar to UO2 is used. The rods which are 1.1 mm in outside diameter and are 1.2 m high are arranged in a square lattice and are inductive…
Dislocation cathodoluminescence exhibiting certain peculiarities in anisotropy of polarization localized in sheets parallel to octahedral planes in a mosaic, semiconducting natural diamond is interpreted as a macroscopic manifestation of microscopic interactions between glide dislocations on these octahedral slip plan…
In earlier work, a prediction method of the immiscibility boundary of a ternary silicate glass system was developed involving two known binary immiscibility boundaries and a measured immiscibility temperature of one ternary glass composition. In the present work, the method is extended to the case where one of the two…
Abstract End-linking mixtures of very short and relatively long polydimethylsiloxane chains with a multi-functional alkoxy silane yields model elastomeric networks having a bimodal chain length distributions, and earlier studies have shown that this compositional heterogeneity increases the ultimate properties of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect probing of the surface properties of alkali-treated aluminas by infrared and x-ray photoelectron spectroscopyP. O. Scokart, A. Amin, C. Defosse, and P. G. RouxhetCite this: J. Phys. Chem. 1981, 85, 10, 1406–1412Publication Date (Print):May 1, 1981Publication History P…
Abstract On the basis of the valence band structure regularities, obtained from combined X‐ray spectral and X‐ray photoelectron studies of electron energy spectra, a model is suggested for the interaction between valence electrons of s, p‐elements and d‐electrons of IIIA, IIB, IB, and transition metals under the forma…
Under certain conditions the anions from 2,5-dihydrothiophen 1-oxide and 2,5-dihydrothiophen 1,l-dioxide undergo ring-opening reactions and the resulting buta-1,3-dienylsulfenate and buta-1,3- dienylsulfinate ions respectively may be alkylated. The anion from 2,5-dihydrothiophen also rearranges to the buta-1,3-dienylt…