Materials Literature
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Silkmoth follicles, arranged in a precise developmental sequence within the ovariole, yield pure and uniform populations of follicular epithelial cells highly differentiated for synthesis of the proteinaceous eggshell (chorion). These cells can be maintained and labeled efficiently in organ culture; their in vitro (an…
Abstract The intermetallic compounds RCo 5 (R = rare‐earth metal) form ferromagnetic hydrides. For some of the RCo 5 ‐H systems (R = La. Pr. Nd, Sm, Gd) room‐temperature isotherms have been measured. These isotherms show two‐phase regions. At 300 K the hexagonal α‐phase has a limited hydrogen solubility (<0.3 H/RCo…
Abstract The optical properties of synthetic crystals of orthorhombic and cubic Sb 2 O 3 , are compared with those of amorphous Sb 2 O 3 The energy gaps in the crystals were found to correspond to indirect transitions.
Interaction of an individual vapor bubble formed by a spark gap in water at room temperature with a neighboring air bubble, such as could have significance in cavitation, was investigated using high speed photography. Air bubbles were located both on and far from boundaries. An air bubble located on the solid boundary…
Abstract An equation correlating the activation energy for the glass transition with T R , a characteristic reference temperature, the fractional free volume, and the rate of change of the fractional free volume was developed. The resultant activation energies for about 30 polymers are given and favorably compare with…
Abstract A study of the weathering of micaceous clays in some Norwegian podzols, includes semiquantitative estimates of minerals in the concentrated clay fractions which show a decrease in the amounts of illite and chlorite, and an increase in vermiculite and mixed-layer minerals upward in the profile. Illite, the dom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetism of methyl-substituted pyrazine complexes of copper(II)Guy W. Inman and William E. HatfieldCite this: Inorg. Chem. 1972, 11, 12, 3085–3090Publication Date (Print):December 1, 1972Publication History Published online1 May 2002Published inissue 1 December 1972https://…
A three phase transformer test facility has been used for measuring the localized power loss and flux distribution within the core. The flux and loss distributions in the T-joint of a core with simple double overlap joints have been investigated. The flux density distribution was measured by an array of search coils w…
Cyclotron resonances in single crystal graphite (SCG) and pyrolytic graphite (PG) have been investigated at about 23 and 69 GHz. A sequence of harmonic resonances is observed for either sense of circular polarization, while the fundamental resonance is found for the polarization sensitive to electron. These resonances…
This handbook represents the third edition of an earlier document. The first and second both entitled 'Aircraft Designer's Handbook on Titanium and Titanium Alloys' were published in August 1965 and March 1967, respectively. Information presented in the handbook was obtained from many sources. Those cooperating includ…
1. Several species of micro-organisms that were capable of utilizing pyridine compounds as carbon and energy source were isolated from soil and sewage. Compounds degraded included pyridine and the three isomeric hydroxypyridines. 2. Suitable modifications of the cultural conditions led to the accumulation of pyridined…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBisfulvalenediiron and its iron(II-III) mixed valence systemUlrich T. Mueller-Westerhoff and Peter EilbrachtCite this: J. Am. Chem. Soc. 1972, 94, 26, 9272–9274Publication Date (Print):December 1, 1972Publication History Published online1 May 2002Published inissue 1 December…
UO2 enthalpy data measured by five different investigators were fitted to a theoretically based equation from room temperature to the melting point. The equation can be used to calculate enthalpy, and differentiated to obtain heat capacity in this temperature range. Two of the constants in the equation are related to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structures of di-.mu.-Oxo-bis(diacetylacetonatotitanium(IV))-bisdioxane, (TiO)C5H7O2)2)2.2C4H8O2, di-.mu.-Oxo-bis(diacetylacetonatotitanium(IV)), (TiO(C5H7O2)2)2G. David. Smith, Charles N. Caughlan, and James A. CampbellCite this: Inorg. Chem. 1972, 11,…
Application of the Evans method for temperature dependent studies of magnetic susceptibility or equilibria will lead to erroneous results unless the variation of solvent density with temperature is taken into account.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence and absorption spectra of polyphenyls. Theoretical study on the band shapeFabio Momicchioli, Maria C. Bruni, and Ivan BaraldiCite this: J. Phys. Chem. 1972, 76, 26, 3983–3990Publication Date (Print):December 1, 1972Publication History Published online1 May 2002P…
The Co 59 nuclear magnetic resonance in a bulk specimen of hexagonal cobalt has been observed as a function of temperature from 4.2 K to 730 K. The hyperfine fields at nuclei at the edge and center of the domain wall are determined to be 217.7 and 225.7 kOe at 4.2 K, respectively. The difference between the two hyperf…
The temperature characteristics of dielectric constants, spontaneous polarization, thermal-expansion coefficients, indices of refraction, and optical rotatory power of Pb5Ge3O11 single crystals have been investigated in detail from room temperature up to above the Curie temperature, 177°C. From the results of these me…
An extracellular protease of Staphylococcus aureus, strain V8, previously shown to cleave specifically the peptide bonds on the carboxyl-terminal side of either aspartate or glutamate residues in phosphate buffer (pH 7.8) hydrolyzes only glutamoyl bonds in either ammonium bicarbonate (pH 7.8) or ammonium acetate (pH 4…
The reciprocal salt pair Sr 2 SiO 4 ‐Sr 2 GeO 4 ‐Ba 2 GeO 4 ‐Ba 2 SiO 4 was investigated using X‐ray powder diffraction and DTA. Unlimited solubility in the low‐K 2 SO 4 structure type (α′) occurs throughout the system above 85°C. The nonlinear changes of some lattice constants of the solid solutions are discussed. A…