Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The crystalline transition induced by immersion in a methanol/water mixture of tussah silk fibroin (from Antheraea pernyi ) film obtained by casting from a 1% solution was studied by x‐ray diffraction, differential scanning calorimetry, and infrared spectroscopy. The molecular conformation of the fibroin, con…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular model of the cooperative amylose-iodine-triiodide complexAttilio Cesaro, Julio C. Benegas, and Daniel R. RipollCite this: J. Phys. Chem. 1986, 90, 12, 2787–2791Publication Date (Print):June 1, 1986Publication History Published online1 May 2002Published inissue 1 Ju…
In a distorted nematic texture, with boundaries at fixed potential, the electric field is nonlocal. This allows in particular the flexoelectric effect to give a volume contribution. Most calculations predicting large distortions must be revised.
Exogenously supplied, C-l4 labeled organic matrix from oyster shell inhibited spicule formation by embryos of the sea urchin, Arbacia punctulata, as measured by simultaneous incorporation of inorganic C-14. Analysis of isolated spicules showed that the matrix reached the site of crystal growth and became incorporated…
Abstract The Morphology of quenched poly(ethylene terephthalate) (PET) films crystallized by low‐molecular‐weight organic penetrants is studied by scanning electron microscopy. Films with thicknesses from ca. 1 mil (0.0025 cm) to ca. 35 mil (0.1 cm) were exposed to methylene chloride (MeCl 2 ) and N , N ‐dimethylforma…
The percent theoretical density, lattice parameter, oxygen-to-uranium ratio, and thermal conductivity of UO2-Gd2O3 burnable absorber fuel pellets were analyzed in terms of the structural chemistry of the cubic fluorite lattice and the chemical behavior of various uranium cations. The sinterability of gadolinia-contain…
"Principles of Phase Conjugation." Optica Acta: International Journal of Optics, 33(6), pp. 685–686
The diatom Thalassiosira pseudonana Hasle & Heimdal was grown in batch culture in one artificial sea-water medium and one fresh-water medium over a range of orthosilicic acid concentrations. Growth rates and cellular silicon quotas were measured in the exponential growth phase. The half-saturation constant of silicon-…
Laser-induced pressure pulses (LIPP's) of < 500 ps duration have been used to measure the ultrasonic attenuation in fluoroethylenepropylene (FEP), polyethyleneterephthalate (PETP) and polyimide(PI) as well as the charge, polarization, and piezoelectricity profiles in the thickness direction of polyvinylidenefluoride (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structural-magnetic study of a new type of high-nuclearity metal carbonyl cluster possessing an eleven-atom Rh5Ni6 core: formation of a heterometallic core via nickel capping of a pentarhodium trigonal-bipyramidal kernelDick A. Nagaki, John V. Badding, Angelica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel peroxo complexes of zirconium containing organic ligandsM. T. H. Tarafder and M. A. Latif MiahCite this: Inorg. Chem. 1986, 25, 13, 2265–2268Publication Date (Print):June 1, 1986Publication History Published online1 May 2002Published inissue 1 June 1986https://pubs.acs…
Abstract The absorption coefficient of GeSe is determined from the measured values of transmissivity and reflectivity. The measurements are carried out with plane polarized light with the plane of polarization parallel to the a ‐ and c ‐axes which lie in the cleavage plane in the temperature range from room temperatur…
Prebreakdown ionization currents have been measured in SF6/N2 and SF6/CCl2F2 mixtures and respective gases by the steady-state Townsend method over the range of reduced fields 70≤E/p20≤200 V cm−1 Torr−1. Relevant collisional processes to be included in the formulation of the current-growth equation are briefly reviewe…
A more complete understanding of the structural and mechanistic details of a catalyzed heterogeneous reaction leads both directly and indirectly to the development of new and better catalysts. For catalyst technology, the most sensitive probe of catalysts performance will continue to be the rate and selectivity of a c…
In this paper we report an extensive study of the relevant static and dynamic parameters connected to microscopic order and reorientational motion of single molecules in liquid-crystalline mesophases. In particular, we have studied the temperature dependence of the second- and fourth-order parameters 〈${P}_{2}$〉 and 〈…
Abstract The 57 Fe Mössbauer spectra of several montmorillonites, measured at room temperature and 453 K, showed a considerably broadened Fe 3+ resonance which can be computer-fitted with a similarly broadened Fe 3+ doublet. In some spectra, particularly if all linewidths were constrained to be equal, this broadened F…
We have investigated the Raman, infrared, and EPR spectra of ${\mathrm{CeF}}_{3}$ in a search for the excited crystal-field levels of the 4${f}^{1}$ configuration in this compound. While this can be achieved routinely for the $^{2}\mathrm{F}_{7/2}$ levels between 2100 and 2900 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}…
Abstract A novel organic conductor β″-(BEDT-TTF)2AuBr2 (BEDT-TTF: bis(ethylenedithio)tetrathiafulvalene, C10H8S8) crystallizes in the triclinic space group p\bar1, with cell constants: a=9.027(1), b=16.372(2), c=5.712(1) Å, α=97.60(1), β=102.94(1), γ=92.09(1) °, V=813.7(2) Å3, and Z=1. A band structure calculation ind…
Abstract This paper reports on the gas sorption and transport properties of poly(vinylidene fluoride) (PVF 2 ) and on the effects uniaxial drawing and processing temperature have on these properties. Sorption and transport were first examined for “as‐received” commercial Kynar PVF 2 film at 35°C. This film was 54% cry…
NADP-specific isocitrate dehydrogenase [threo-DS-isocitrate: NADP+ oxidoreductase (decarboxylating), EC 1.1.1.42] was purified 200-300-fold from the citric acid-accumulating fungus Aspergillus niger. The enzyme consists of a single polypeptide chain with a molecular mass of 60 +/- 4 kDa and has a pI of 5.9 +/- 0.2. On…