Materials Literature
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Data on the linear viscoelastic relaxation of wool fibers for a range of relative hu midities below the gas transition ( T g ) are systematized by a humidity-time superposition method. The differences in the relaxation behavior in water where the fiber is above its Tg are pointed out. The analysis relates to the prope…
The structure of liquid formamide is discussed on the basis of X-ray diffraction measurements and MO calculations. It is concluded that liquid formamide has both chain-like and ring-dimer moieties and that the former ones have a longer life time.
A simple block digester for total soil N measurement was assembled from a small low‐temperature aluminum block and a hot plate. The samples are digested in 16 mm diameter heat resistant glass tubes using H2SO4 and a digestion mixture composed of CuSO4 and K2SO4. The ammonium content in the digest is determined colorim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of the polyoxothioanions TaW5O18S3- and NbW5O18S3-W. G. Klemperer and C. SchwartzCite this: Inorg. Chem. 1985, 24, 26, 4459–4461Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December…
The present work describes a perchloric-acid-soluble high-mobility-group (HMG)-like protein present in HeLa and Ehrlich ascites cells, rat and calf liver. The protein is designated P1 and has, depending on the source, a molecular mass 48-53 kDa and an amino acid composition which, like the HMG proteins, is characteriz…
Photoelectron spectra of single crystals of eight aromatic compounds were measured at several UV wavelengths. Useful results were obtained when sample charging was eliminated by inducing photoconduction through subsidiary illumination of the sample crystal with low energy light, and/or by a vapor-deposited gold grid o…
The initial oxidation stages of lactic acid by acid permanganate were investigated. The rate of the induction period was slow and then gradually increased. The kinetics of oxidation were second order, first order with respect to both lactic acid and Mn(VII). The reaction was acid catalyzed. Addition of Mn(II) ions lar…
Complex refractive index and complex dielectric permittivity and loss tangent data for polyethylene, polypropylene, poly-4 methyl-perrtene1 (TPX), and polytetrafluorethylene (Teflon) are presented over the frequency range 60-300 GHz. All of these nonpolar polymers are extremely low-loss materials. As in the microwave…
Abstract Ab initio configuration interaction calculations are reported on the lowest quintet, triplet, and singlet states of Fe II (P). Due to the large number of states found, a catalog of the low‐lying states is presented. Novel triplet and quintet charge‐transfer states are reported as low as 1.3 eV. These states a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry and spectroelectrochemistry of gallium(III) porphyrins. Redox properties of five-coordinate ionic and .sigma.-bonded complexesK. M. Kadish, B. Boisselier-Cocolios, A. Coutsolelos, P. Mitaine, and R. GuilardCite this: Inorg. Chem. 1985, 24, 26, 4521–4528Publi…
ABSTRACT Growth and sexual reproduction of the marine littoral diatom Cocconeis scutellum Ehrenb. var. ornata Grun. were investigated at 30 different combinations of temperature (5, 10, 14, 18, 22° C), irradiance (20, 60, 100 μE·m −2 ·s −1 ) and daylength (14:10 and 10:14 h LD cycle). Growth occurred at all combinatio…
The results of measurements of the optical parameters and thicknesses of passive films grown on iron in an alkaline ( p H 12) chloride containing solution suggest that these films were composed of and that they resisted pitting when water content was sufficiently reduced. The passive film was formed in two distinct st…
We have studied the susceptibility of fibrils formed from fetal bovine skin type III collagen to proteolytic enzymes known to cleave within the helical portion of the molecule (vertebrate and microbial collagenase, polymorphonuclear elastase, trypsin, thermolysin) and to two general proteases of broad specificity (pla…
The theory of small-angle neutron or X-ray scattering from a solution consisting of rods that are uncorrelated in position and orientation and its use in determining the mass per unit length and cross-sectional radius of gyration is extended to rods of finite length and non-uniform cross-sectional structure. The case…
Pyrophosphate, citrate and magnesium, inhibitors of hydroxyapatite crystal growth, were studied using a seeded crystal growth system of constant composition at pH 5.80, 6.60 and 7.40. With this technique, crystal growth was studied at constant supersaturation at different pH values without the induction of other calci…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEdge-sharing bioctahedral dimolybdenum(III) molecules with .mu.-RS groups. Direct experimental evidence for spin-state equilibriaF. Albert Cotton, Michael P. Diebold, Charles . O'Connor, and Gregory L. PowellCite this: J. Am. Chem. Soc. 1985, 107, 25, 7438–7445Publication Da…
ADVERTISEMENT RETURN TO ISSUEPREVArticleCopolymer/copolymer blends: effect of sequence distribution on miscibilityAnna C. Balazs, Frank E. Karasz, William J. MacKnight, Hiroyoshi Ueda, and Isaac C. SanchezCite this: Macromolecules 1985, 18, 12, 2784–2786Publication Date (Print):December 1, 1985Publication History Publ…
Abstract Dextran was activated by reaction with 4‐nitrophenyl chloroformate. Analysis of the total carbonate content and the content of 4‐nitrophenyl carbonate moieties during the course of the reaction demonstrate the formation of different types of carbonate moieties. The 4‐nitrophenyl carbonate moieties are transfo…
Abstract The internal fabric of glauconite pellets has been studied by high-resolution transmission electron microscopy (HRTEM) for a better understanding of the glauconitization process. Typical “lamellae” which make up the glauconite pellets showed a spindle-like arrangement of layered crystallite packets. Three mai…
Carla M. Arundel, Arvin S. Glicksman, John T. Leith, Enhancement of Radiation Injury in Human Colon Tumor Cells by the Maturational Agent Sodium Butyrate (NaB), Radiation Research, Vol. 104, No. 3 (Dec., 1985), pp. 443-448