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Abstract Second‐order Raman spectra are studied in tetragonal ZnP 2 and CdP 2 crystals. The main feature of the spectra is a strong dominance of the A 1 ‐component over the E‐ and B 2 ‐components. Whereas the former is due to overtones, the latter ones are associated with combination tones. Besides, the A 1 ‐component…
The digestion and absorption of collagen, native and artificially cross-linked, has been examined in the rat and the Gaboon viper, by feeding known quantities and measuring the hydroxy-proline content of the faeces and of the contents of the gut at different levels, and comparing with an unabsorbable marker (polyethyl…
The reactivity of skin elastin and collagen to ANS (8-anilinonaphthalene-1-sulphonate) dissolved in nonpolar (e.g. butanol) and polar (distilled water, phosphate buffer at pH 2.8 and 8.2) solvents was compared in histological sections. The elastin fibers were demonstrated to differ from collagen at the fluorescence mi…
Abstract A novel type composite catalyst in which small amounts of La2O3 and Ru are incorporated with Ni substrate supported on a granulated silica having bimodal pore structure, was found to be a very efficient hydrogenation catalyst for selective methane formation from carbon oxides. Contrary to the case of Ni, the…
Abstract Uptake of cations by plant roots growing in soil is believed to be influenced by the relative adsorption strengths of cations by soil exchange sites. The adsorption of K and Rb by four soils was investigated to determine the differences in adsorption of K and Rb which may occur and how they are affected by so…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Intramolecular Scattering Function of Model Branched PolymersP. M. Toporowski and J. RooversCite this: Macromolecules 1978, 11, 2, 365–368Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.or…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text R. Winston, "Cone collectors for finite sources," Appl. Opt. 17, 688-689 (1978) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Sav…
Recent progress in NMR analysis of Fe3O4 has revealed the presence of five B site Fe3+ ions, called B-1, B-2, B-4 and B-5. From the symmetry of the NMR lines of these ions, a very new electron ordering was proposed, in which Fe3+-I ions make pairs along [11̄0] direction and Fe2+-II ions also behave in the same way. In…
Summary An X-ray and chemical examination of deweylites reveals that they are intimate mixtures of very poorly ordered trioctahedral 2:1 and 1:1 layer silicates. The 2:1 mineral exhibits no swelling in the presence of ethylene glycol or water and is best described as an extremely fine-grained and highly disordered for…
Permanent magnets made from SmCo5 exhibit negative reversible change in magnetization with increasing temperature, typically of the order of 0.04% per deg. C. between −100 and +200 C. It is desirable to improve this property by suitable substitutions. In the present study, a systematic examination of the preparation,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA neutron powder diffraction study of palladium tetrafluorideAlbert F. Wright, B. E. F. Fender, N. Bartlett, and K. LearyCite this: Inorg. Chem. 1978, 17, 3, 748–749Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March…
Abstract A study has been made on the impact and yield properties of polycarbonates from two manufacturers as a function of strain rate, melt flow rate, notch radius, thermal history, and test temperature. The yield stress increases with the strain rate and annealing time in exactly the way predicted by a recently pro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Rigidity of Molecules of Aromatic Polyamides in SolutionsV. N. Tsvetkov and I. N. ShtennikovaCite this: Macromolecules 1978, 11, 2, 306–312Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://…
The pseudobinary compounds Er 6 (Fe 1-x Mn x ) 23 are ferrimagnetic with drastically changing Curie temperatures dependent upon the Fe-Mn concentration. The magnetisation against temperature curves are analysed in terms of a two-sublattice molecular field model. It is shown that the 3d-3d interaction is dominant for t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLinear Poly(N-alkylethylenimine)sTakeo Saegusa, Akira Yamada, Hiroshi Taoda, and Shiro KobayashiCite this: Macromolecules 1978, 11, 2, 435–436Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.or…
The effects of destabilizing vertical thermal gradients on crystal growth and segregation in an inverted Bridgman configuration were investigated in Ga‐doped Ge melts by monitoring the thermal characteristics of the melt and relating them through interface demarcation directly to growth and segregation. It was found,…
The spinel ferromagnetic semiconductor HgCr2Se4 (Tc=110 K) has been grown from the vapor. Annealing under Hg atmosphere gives n-type material. The Hg annealed HgCr2Se4 specimens are degenerated semiconductors with n=1017–1018 cm−3, μ4.2?300–1200 cm2/V sec. The resistivity increases by two orders of magnitude at Tc. Th…
The magnetic properties of crystallographically ordered ferromagnetic materials are strongly dependent on the presence of crystal defects, because of the effect of defects on the domain structure. Electron microscopy enables the defects and domain walls to be imaged simultaneously, and is therefore capable of giving d…
The temperature dependence of the saturation magnetization of vapor deposited amorphous Fe-Gd thin films have been analyzed in terms of the mean field theory. This analysis yielded values of the Fe spin, and the Fe-Fe and Fe-Gd exchange interaction energies, which were then correlated to composition. The temperature a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared study of methanol decomposition on alkali metal X-type zeolitesMark L. UnlandCite this: J. Phys. Chem. 1978, 82, 5, 580–583Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.org/doi/10.1…