Materials Literature
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Eigh t iso th ermal e quati ons of s ta te a re analyze d to yield quantitativ e m eas ures of th e degrees to whi c h eq uat ion pa irs can be di sc rimin ated for real data , data of limite d s pan a nd prec is ion. Calc ul a ted c urv es a ll ow one to assess th e spa n a nd precis ion necessa ry in PV data to a ll…
Abstract The infrared spectra of undenatured bovine tendon collagen were investigated at 25°C and relative humidities from 0 to 95%. Suitable samples were prepared by forcing frozen suspensions of the material in distilled water through a stainless steel capillary. The samples were investigated by electron microscopy…
Abstract Systeme aus monomolekularen Schichten können Funktionseinheiten bilden, welche Eigenschaften entfalten, die den Einzelschichten fehlen. So findet z. B. bei UV‐Bestrahlung ein Energieübergang von einer Sensibilisator‐(S‐) Schicht auf eine Acceptor‐(A‐) Schicht statt, der sich durch Fluoreszenz von A zu erkenne…
Abstract Physical changes induced by prolonged Ca(OH) 2 ‐treatment were determined for natural peds from specific horizons of Beaumont, Hiwassee, Houston Black, Katy, and Nacogdoches soils. Confined swelling pressures, liquid limits, and plasticity indexes decreased substantially for soil peds treated with 5% Ca(OH) 2…
Abstract The rates of shear encountered in topical application of cosmetic creams and lipstick were obtained by dividing the application velocities, at which the samples are being sheared, by the applied thicknesses of the layer. The application velocity was measured by means of a high‐speed camera. Beauty artists, fo…
Abstract On the basis of morphology, pH, and solubility in Na 4 P 2 O 7 , three Wisconsin histosols were classified as (i) a Fibrist, (ii) a Hemist, and (iii) a Saprist. Fiber content was found to be the single most useful characteristic in the classification of these Histosols, and in quantifying various stages of de…
Abstract This study was undertaken to measure quantitatively the flammability characteristics of cotton and polyester fibers. The smoke density generated during the burning of these fabrics was also studied at various temperature conditions. A mathematical relationship was established between the results obtained in a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLight-Scattering Studies on Polystyrene-Polyisoprene Block CopolymersJ. Prud'homme and S. BywaterCite this: Macromolecules 1971, 4, 5, 543–548Publication Date (Print):September 1, 1971Publication History Published online1 May 2002Published inissue 1 September 1971https://pub…
Abstract The γ‐alumina polymerization of furfuryl alcohol produces a polymer differing in structure from that obtained by polymerization with acid catalysts. In order to gain a better understanding of the basic chemistry of this method of polymerization furfuryl alcohol, studies were done, both with γ‐alumina‐polymeri…
Abstract Through the use of accelerators containing higher alkyl substitution, we have been able to attain improved properties of EPDM diene rubber blends. EPDM/NBR blends vulcanized with sulfur cure systems employing these accelerators compete favorably with CR compounds in heat aging; have essentially the same oil r…
The polarized optical spectrum of Er3+ in calcium tungstate at 4.2 and 77°K is reported. Radial integrals and spin-orbit coupling parameter derived from fitting the position of the centers of gravity of the J manifolds in intermediate coupling are F2=423.89 cm−1, F4=67.995 cm−1, F6=6.667 cm−1, ζ=2377 cm−1. A first-ord…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPotentiometric study of the dissociation of the tetrachloroaluminate ion in molten sodium chloroaluminates at 175-400.deg.G. Mamantov and G. TorsiCite this: Inorg. Chem. 1971, 10, 9, 1900–1902Publication Date (Print):September 1, 1971Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImidazole Complexes as Hardeners for Epoxy AdhesivesR. Dowbenko, C. C. Anderson, and W. -H. ChangCite this: Ind. Eng. Chem. Prod. Res. Dev. 1971, 10, 3, 344–351Publication Date (Print):September 1, 1971Publication History Published online1 May 2002Published inissue 1 Septemb…
Abstract The special performance properties noted for silane coupling agents in mineral filled EPDM compounds result from the interfacial effects related to the dual function reaction of the organofunctional silane. When common alkoxy substituted vinyl silanes are used, the nature of the hydrolyzable groups on the sil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of steric interactions on endo stereoselectivityK. N. Houk and L. J. LuskusCite this: J. Am. Chem. Soc. 1971, 93, 18, 4606–4607Publication Date (Print):September 1, 1971Publication History Published online1 May 2002Published inissue 1 September 1971https://pubs.acs…
Abstract The optical absorption spectrum of B 12 C 3 exhibits an indirect interband transition with onset at h ω = (0.48±0.03) eV. In the subsequent region of lower absorption (α ∼ 400 cm −1 ) traps of great density are essentially effective for the optical properties. The lattice vibration spectrum starting at 4 μm h…
The high oxygen pressure conductivity of high‐purity single‐crystal magnesium oxide at high temperatures varied as the 1/4 power of the oxygen partial pressure with a 3 eV activation energy; the low pressure conductivity varied as the ‐1/6 power of the pressure with an activation energy of 4 eV. The predominant defect…
We present new measurements of thermoelectric power for nickel and cobalt dilute alloys with d transition elements in two temperature ranges: from 1.3 to 4.2 K and from 77 to 300 K. We analyse the measurements at room temperature in a two-band conduction model and deduce the thermopowers associated with the matrix ( S…
If open-end spun yarns are to find wide use, it is necessary to understand more fully the structure of the yarns. The differences in structure arise because of the manner in which the yarn is made. Bridging fibers are converted into hooks in the spinning process and this reduces the effective fiber length in the yarn.…
The rate constants and products from the interaction of the first triplet state of nitrogen, N2(A 3Σu+), with C2H4 and cis-C4H8 have been measured in a discharge flow apparatus. The reactions are fast with rate constants near 1014 cc mole−1·sec−1 and give products which are typical of other triplet—triplet donor react…