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Samples of ar~e n i c s ulfid e glaHS " -ere investigated to clc>lerll1ine the ir che m ical a nd phys ical properties. Amon g the proper ties r eported a re t ile hygros co pici t.I', chemi cal durability, hydroge n e lec trod e fUllc t ioll, ex pansivi ty , clastic nlOduli, modulus of rnpture', hardn ess, transmitta…
Large single crystals of Fe 7 Se 8 and Fe 3 Se 4 were prepared, and their magnetic properties below the Curie point were investigated by a torque magneto meter. The results obtained on Fe 7 Se 8 at room temperature show similar characterics to that of natural pyrhotite (Fe 7 S 8 ), i.e. the crystals can be magnetized…
The cubic structure of yttrium oxide is stable to 1800°C. in air as indicated by petrographic, X‐ray, and differential thermal analyses. A change in lattice parameter of less than ±0.007 a.u. was observed on heating the oxide to 1800°C. The mean specific heat of Y 2 O 3 to 1600°C. was 0.13 cal. per gm. per °C. The coe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolypeptides. XVII. A Study of the Kinetics of the Primary Amine-initiated Polymerization of N-Carboxy-anhydrides with Special Reference to Configurational and Stereochemical EffectsR. D. Lundberg and Paul DotyCite this: J. Am. Chem. Soc. 1957, 79, 15, 3961–3972Publication D…
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ADVERTISEMENT RETURN TO ISSUEPREVArticlePolyethylene: Preparation, Structure, And PropertiesSundar L. Aggarwal and Orville J. SweetingCite this: Chem. Rev. 1957, 57, 4, 665–742Publication Date (Print):August 1, 1957Publication History Published online1 May 2002Published inissue 1 August 1957https://pubs.acs.org/doi/10…
All recent methods for the isolation of the ribonucleic acids from yeast yield only 20 to 70 per cent of the ribonucleic acids that can be assumed to be present on the basis of quantitative analyses. There have been no studies regarding the nature of the ribonucleic acids that are lost during isolation, but it has tac…
Abstract Further experiments by transmission electron microscopy on thin sections of stainless steel deformed by small amounts have enabled extended dislocations to be observed directly. The arrangement and motion of whole and partial dislocations have been followed in detail. Many of the dislocations are found to hav…
The electrical resistivity, Hall coefficient, and thermoelectric power of microscopic boron single crystals have been measured as a function of temperature. Rectification and photoconductivity effects were observed at room temperature. The large majority of these single crystals had a high resistivity (about 1.7\ifmmo…
Irradiation of thick samples of borosilicate glass with high-energy electrons introduces space charges into the dielectric, the decay of which is extremely slow at room temperature. The charged dielectric shows a behavior similar to that of an electret; charges are induced on adjacent conductors and short-circuit disc…
Abstract Es wird die Darstellung des Azulens durch Kondensation von Cyclopentadien mit Glutacondialdehyd‐Derivaten beschrieben. Die Synthese erfordert keine Dehydrierungsreaktion und verläuft mit einer Azulen‐Ausbeute von 65% der Theorie. Auf dem gleichen Wege können auch substituierte Azulene hergestellt werden.