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Abstract The thermal conductivity of segregated distributions of poly (vinyl chloride)/nickel (PVC/Ni) and poly(vinyl chloride)/copper (PVC/Cu) was measured for volume fractions ranging from 0 to 0.15. The thermal conductivities increased from 0.15 Btu/hr ft °F for unmodified PVC to 2.79 Btu/hr ft °F for PVC/15 percen…
Sulfhydryl reagents, as well as mild hydrogen peroxide oxidation, do not inhibit the activity of yeast phosphoglycerate kinase, indicating that the single thiol group and 3 methionine residues present in the enzyme are not essential for activity. Nitration of phosphoglycerate kinase by tetranitromethane inhibits the e…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structures of ion radical molecular complexes of cis-bis(trifluoromethylethylene-1,2-dithiolato)nickel with phenothiazine and phenoxazine. Effects of donor-acceptor separation on the molecular propertiesAnami. Singhabhandhu, P. D. Robinson, J. H. Fang,…
Abstract The deformational, swelling, and potentiometric behavior of poly(methacrylic acid) gels was measured as a function of the degree of crosslinking, ionic strength, and degree of ionization. The comparison of the stress–strain behavior with theoretical relations derived in the preceding part has shown that the r…
The first-order Raman spectrum of single-crystalline PhTi${\mathrm{O}}_{3}$ in the teatragonal ferroelectric phase was studied at room temperature as a function of hydrostatic pressure up to 80 kbar. Mode Gr\"uneisen parameters, as well as higher-order coefficients in the expansion of phonon frequency vs pressure are…
Long-spacing-segment crystallites prepared from type III collagen with the chain composition [alpha1(III)]3 and type I collagen with the chain composition [alpha(I)]i12alpha2 have been compared in the electron microscope after positive. staining with phosphotungstic acid and uranyl acetate. The comparison revealed sev…
A procedure is described in this paper for distinguishing in the measured electrical properties of polycrystalline β‐alumina, the separate contributions of the grain boundaries and of the crystal, i.e. , the grain interiors. This separation is brought about through the use of a model for these properties. Certain quan…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical adsorption of patchwise heterogeneous surfaces. I. Heterogeneity, two-dimensional phase transitions, and spreading pressure of the krypton-graphitized carbon black system near 100.deg.KFrederick A. Putnam and Tomlinson Fort Jr.Cite this: J. Phys. Chem. 1975, 79, 5,…
A two−phase material in which the phase boundaries are cylindrical surfaces is considered. The generators of the phase boundaries are parallel to the z axis and the x and y axes are the principal axes of the effective conductivity tensor. If the two phases have conductivities σ1 and σ2, then the effective conductivity…
A procedure is described to utilize blue dextran-Sepharose as an affinity chromatographic column specific for the super-secondary structure called the dinucleotide fold, which forms the binding sites for substrates and effectors on a wide range of proteins. The procedure can be used to identify proteins, either purifi…
It has been observed here that the K edge of strontium is shifted towards the high energy side in all its compounds with respect to strontium metal. These shifts have been correlated, qualitatively with the interatomic distances and the per cent ionic character of the bonds in simple compounds. A graph of observed shi…
Abstract The results of the absorption edge study of some glasses based on CdAs 2 are discussed in terms of internal potential fluctuations. Both the electrostatic and deformation fluctuations are present in a‐CdGeAs 2 whereas in remaining glasses only the former were observed. A qualitative description of the electro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnusually facile bridgehead enolization. Locked boat forms in anti-Bredt olefinsAlex Nickon, Douglas F. Covey, Fu-Chih Huang, and Yu-Neng KuoCite this: J. Am. Chem. Soc. 1975, 97, 4, 904–905Publication Date (Print):February 1, 1975Publication History Published online1 May 20…
Abstract Die acetophenon‐sensibilisierte Belichtung von Allen liefert eine komplexe Produktmischung, aus der sich das Allendimere 1 , die Trimeren 2 und 3 sowie die Ketone 4 und 5 isolieren lassen. Dieser Befund steht im Gegensatz zur beschriebenen thermischen Di‐ und Trimerisierung des Allens, die zu 1, 8–12 führt. E…
1,3-Diphenyl-2-pyrazolines substituted in the 4- and 5-positions with phenyl groups undergo dye-sensitized photooxidation at widely different rates depending on the substitution pattern. Depending on both the solvent and the substitution pattern, two types of reaction are usually observed: (a) dehydrogenation to the c…
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 Selim Ades and C. H. Champness, "Optical activity of tellurium to 20 µm," J. Opt. Soc. Am. 65, 217-218 (1975) Export Citation BibTex Endnote (RIS) HTML…
In Mytilus californianus, root lamellae of the byssus stem are formed by two morphologically distinct exocrine cell types. Type 1 cells contain large ellipsoid granules which are ultrastructurally identical to those of the collagen gland associated with byssus thread formation: these granules are secreted only at the…
Abstract The ab initio self‐consistent energy band structure of trigonal selenium based on the Hartree‐Fock‐Slater formalism has been determined with the self‐consistent symmetrized OPW method (SCSOPW). The influence of lattice constants, exchange potential, and relativistic effects is discussed. The density of states…
A measurement of the dielectric breakdown strength in low- and high-density polyethylene was carried out under the condition of elongation by tensile stress. The wave forms of applied voltages were a.c., d.c. and impulse (1×40 µs) voltages, and the thickness of films of polyethylene was ca. 50 µm. In the case of low-d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition metal complexes containing an optically active macrocyclic ligand. Manganese(III), nickel(II), and copper(II)Philip S. Bryan and James C. DabrowiakCite this: Inorg. Chem. 1975, 14, 2, 299–302Publication Date (Print):February 1, 1975Publication History Published on…