Materials Literature
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Auger electron spectroscopy and low‐energy ion scattering were used to assess surface composition of yttrium‐doped polycrystalline and single‐crystal α‐aluminas which were heated under vacuum to temperatures above 1500°C. Extensive surface and intergranular precipitation of yttrium aluminum garnet was observed in a co…
Al-Mn quasicrystals having icosahedral structure were prepared by melt-quenching, and the magnetic and electrical properties of both quenched and annealed specimens were investigated. The magnitude of the localised magnetic moments of Mn deduced from the Curie constant was qualitatively explained on the basis of the P…
Apparatus for collecting X-ray diffraction data from protein crystals at pressures up to 0.2 GPa is described. The modified techniques required for crystal mounting, determination of crystal orientation in the beryllium pressure cell, and centering in the X-ray beam are described. Special attention is required for int…
A search for specific proteins involved in newt limb regeneration, using monoclonal antibodies against forelimb blastemas, led to the detection of an antigen in the regenerate epithelium. Fluorescent-antibody-labeled cells first appeared just prior to blastema outgrowth. From bud through early digit stages this antibo…
A series of seven Y–Si–Al–(O,N) glasses with constant Y: Si: Al ratio and increasing substitution of nitrogen for oxygen has been investigated by 29Si NMR (MAS) spectroscopy. The spectra obtained are indicative of (i) nitrogen entering the glass network, and (ii) the coexistence of a variety of structural units. The d…
A monoclonal antibody (CC-212), obtained in a fusion experiment in which basal bodies from quail oviduct were used as immunogen, has been shown to label the apical pole of ciliated cells and to react with a 200-kD protein. This monoclonal antibody was demonstrated to be an anti-myosin from smooth muscle or from nonmus…
We report high-resolution x-ray scattering measurements of the critical fluctuations in mixtures of hexylphenyl cyanobenzoyloxy benzoate (${\mathrm{DB}}_{6}$) and terephtal-bis-butylaniline (TBBA). The phase sequence exhibited on cooling pure ${\mathrm{DB}}_{6}$ (or mixtures with a low concentration of TBBA), is nemat…
Abstract The yield of a nonpremixed series‐parallel reaction at complete conversion was measured in a turbulent, tubular‐flow reactor with single and multijet feeds. The yield of the intermediate decreased as mixing was slowed relative to the chemical kinetics, either by decreasing the Reynolds number, or by using a l…
Pyridoxal kinase has been purified 9000-fold from sheep brain. The purification procedure involves ammonium sulphate fractionation, DEAE-cellulose chromatography, affinity chromatography and Sephadex G-100 gel filtration. The final chromatography step yields a homogeneous preparation of high specific activity with a p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHelical twist and spontaneous polarization direction in ferroelectric smectic liquid crystals. 2J. W. Goodby and E. ChinCite this: J. Am. Chem. Soc. 1986, 108, 16, 4736–4742Publication Date (Print):August 1, 1986Publication History Published online1 May 2002Published inissue…
This paper summarizes the stress and fracture analyses of a three‐layer ceramic composite which is a fundamental building block for the monolithic solid oxide fuel tell currently being developed at Argonne National Laboratory. A small difference in the coefficients of thermal expansion of different layers can result i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMutual diffusion in concentrated polymer solutions under a small driving forceC. J. Durning and M. TaborCite this: Macromolecules 1986, 19, 8, 2220–2232Publication Date (Print):August 1, 1986Publication History Published online1 May 2002Published inissue 1 August 1986https:/…
Three different coadsorption structures of CO and oxygen over Pd(111) were analyzed through measurements of the intensity of LEED spots; separate domains of p(2×2)–O and ((3)1/2×(3)1/2)R30°–CO, closely contacted domains of ((3)1/2×(3)1/2)R30°–O with the same structure of CO, and also a mixed phase with (2×1) periodici…
Abstract— Synthesis of the tumor‐localizing preparation HPD (hematoporphyrin derivative) results in the formation of dimers and oligomers of hematoporphyrin joined by labile linkages. Studies with HPD and an HPD analog containing the chlorin analog of mesoporphyrin suggest the presence of two different linkages, eithe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHelical twist sense and spontaneous polarization direction in ferroelectric smectic liquid crystals. 1J. W. Goodby, E. Chin, T. M. Leslie, J. M. Geary, and J. S. PatelCite this: J. Am. Chem. Soc. 1986, 108, 16, 4729–4735Publication Date (Print):August 1, 1986Publication Hist…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoreceptor molecules. Synthesis of metalloreceptors containing porphyrin subunits and formation of mixed substrate supermolecules by binding of organic substrates and of metal ionsAndrew. Hamilton, Jean Marie. Lehn, and Jonathan L. SesslerCite this: J. Am. Chem. Soc. 1986, 1…
Endothelial seeding of vascular graft surfaces may lead to a less thrombogenic surface. We examined the feasibility of using microvessel endothelial cells derived from human fat for seeding purposes. Human fat was treated with collagenase for 24 minutes, washed, and purified in a Percoll gradient separation. This yiel…
Abstract— Sulfonated phthalocyanine and a series of its metal chelates in combination with red light irradiation led to the degradation of L‐tryptophan in oxygenated aqueous solution. The photoproducts and the rate of transformation of L‐tryptophan are compared with hematoporphyrin and rose bengal sensitized photooxid…
Strengths across the join between diffusion‐bonded Al 2 O 3 parts were evaluated in three‐point bending. Bond strengths as high as 60% of the alumina itself were achieved.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHomogeneous precipitation of nickel as the dimethylglyoxime complex: revisitedJens. Hemmingsen, David. Larkin, and Thomas. MartinCite this: Anal. Chem. 1986, 58, 9, 2087–2088Publication Date (Print):August 1, 1986Publication History Published online1 May 2002Published inissu…