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Growth of the posterior silk gland and biosynthesis of fibroin during the fifth larval instar of the silkworm, Bombyx mori, have been studied. In accordance with the exponential increase in the wet weight of the gland, the amounts of DNA, RNA, protein, and lipids per animal increased rapidly in the early stage of the…
Densification and grain growth rates at the intermediate stage of the sintering of pressed zinc oxide pellets were measured in air and oxygen. Application of a lattice diffusion model to the results gave calculated diffusion coefficients in good agreement with directly measured diffusion coefficients for zinc. The cha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSURFACE CHEMISTRY ASPECTS OF EMULSION POLYMERIZATIONCharles P. RoeCite this: Ind. Eng. Chem. 1968, 60, 9, 20–33Publication Date (Print):September 1, 1968Publication History Published online1 May 2002Published inissue 1 September 1968https://pubs.acs.org/doi/10.1021/ie50705a0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Role of Organic Agents in the Stress Crazing and Cracking of Poly(2,6-dimethyl-1,4-phenylene oixde)G. A. Bernier and R. P. KambourCite this: Macromolecules 1968, 1, 5, 393–400Publication Date (Print):September 1, 1968Publication History Published online1 May 2002Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyridine-induced solvent shifts in the nuclear magnetic resonance spectra of hydroxylic compoundsPaul V. Demarco, Eugene Farkas, David Doddrell, Banavara L. Mylari, and Ernest WenkertCite this: J. Am. Chem. Soc. 1968, 90, 20, 5480–5486Publication Date (Print):September 1, 19…
(a) After injection of labeled leucine into the eye of goldfish, radioactive protein rapidly accumulates in the contralateral optic tectum in the layer containing the synaptic endings of the optic fibers. This material reaches the tectum 6-12 hr after the isotope injection, a fact which indicates that the rate of tran…
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Thermal and x-ray diffraction measurements on compositions from the system NaxK1−xNbO3 have revealed the presence of phase boundaries at approximately 82.5, 67.5, and 52.5 mole × NaNbO3 at 25°C, in addition to one very near the NaNbO3 end member. The optimum piezoelectric properties in this system are apparently assoc…
Summary Potassium pyrophosphate (0.1 m ) removes very little Fe from crystalline Fe oxides at pH 10, but peptizes finely divided hydrous amorphous oxides and organic matter in soils. Fe and C contents of extracts from each horizon of twenty‐six British soil profiles show distinctive patterns, independent of the residu…
We describe here a metallic ferromagnetic system ${\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x}{\mathrm{S}}_{2}$ and ${\mathrm{Co}}_{1\ensuremath{-}x}{\mathrm{Ni}}_{x}{\mathrm{S}}_{2}$ that appears to have a single doubly degenerate band. The electrons in the band are itinerant as manifested by metallic electrical…
The rate of quenching of triplet excitons by paramagnetic impurities in anthracene crystals at room temperature is found to be magnetic-field dependent. A theory of the effect is presented.Received 17 July 1968DOI:https://doi.org/10.1103/PhysRevLett.21.609©1968 American Physical Society