Cellulose/poly(4-vinylpyridine) blends
Peer reviewed: Yes
Materials Literature
文献浏览
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。
Vcenters inMgAl2O4spinels
V centers induced by ionizing irradiation at 80 or 300 K in single-crystal and polycrystalline ${\mathrm{MgAl}}_{2}$${\mathrm{O}}_{4}$ samples have been studied by use of electron paramagnetic resonance and optical absorption. ${\mathit{V}}_{\mathit{t}}^{\mathrm{\ensuremath{-}}}$ and ${\mathit{V}}_{\mathit{o}}^{2\math…
Emigration and immigration can be important determinants of benthic diatom assemblages in streams
SUMMARY. Interspecific differences in diatom abundances in stream drift (plankton), immigration, and natural benthic assemblages were compared to assess the importance of emigration and immigration in benthic diatom community dynamics. Water samples were collected throughout a 24‐h period to measure diel changes in di…
Lösliche (Tetraethylphthalocyaninato)eisen(II)‐ und ‐cobalt(II)‐Verbindungen
Soluble (Tetraethylphthalocyaninato)iron(II) and ‐cobalt(II) Compounds The (tetraethylphthalocyaninato)iron and ‐cobalt compounds Et 4 PcFe (9), Et 4 PcCo ( 8 ), and Et 4 PcH 2 ( 7 ) have been synthesized starting from 3,4‐dibromoacetophenone ( 1 ) via the corresponding dinitrile 5 or isoindolenine 6 , respectively. E…
Crystallization of polymer melts under fast cooling. I: Nucleated polyamide 6
Abstract Samples of nucleated polyamide 6 were quenched from the melt so as to monitor cooling histories. Their morphology and crystal structures were discussed in relation to sample thermal history; cooling history relevant to quenched sample morphology was recognized as being confined in the interval 110 to 160°C. I…
Through a Beer Glass Darkly
Pour yourself a glass of beer and look closely at the rising bubbles. Careful examination shows that they are seldom distributed uniformly throughout the liquid. Instead, streams of bubbles appear to rise from certain spots on the surface of the glass. Closer inspection reveals that the bubbles rapidly grow in size as…
Synthesis of poly(3-hydroxyalkanoate) (PHA) conjugates: PHA-carbohydrate and PHA-synthetic polymer conjugates
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of poly(3-hydroxyalkanoate) (PHA) conjugates: PHA-carbohydrate and PHA-synthetic polymer conjugatesManssur Yalpani, Robert H. Marchessault, Frederick G. Morin, and Clevys J. MonasteriosCite this: Macromolecules 1991, 24, 22, 6046–6049Publication Date (Print):Octobe…
DETERMINATION OF CONSTANTS AND COMPARISON OF RESULTS FOR VARIOUS CONSTITUTIVE MODELS
The ability to compare different constitutive models has been difficult in the past because the constants associated with these models are developed using different methods and test data. This work presents an explicit, consistent procedure for which constants can be determined for different constitutive models using…
Electrical and magnetic properties ofNb2O5−δcrystallographic shear structures
The reduced niobium oxides ${\mathrm{Nb}}_{25}$${\mathrm{O}}_{62}$, ${\mathrm{Nb}}_{47}$${\mathrm{O}}_{116}$, ${\mathrm{Nb}}_{22}$${\mathrm{O}}_{54}$, and ${\mathrm{Nb}}_{12}$${\mathrm{O}}_{29}$ have been prepared in pure polycrystalline form by a niobium-metal gettering technique. They are related to the high niobia…
The breadth and shape of instrumental line profiles in high-resolution powder diffraction
The instrumental resolution function for the Daresbury 9.1 high-resolution powder diffractometer has been measured as a function of wavelength, slit width and specimen geometry. It has been demonstrated that the effects of size and strain from the sample of annealed barium fluoride used as a reference material were ne…
Effect of Hydrogenase and Mixed Sulfate-Reducing Bacterial Populations on the Corrosion of Steel
The importance of hydrogenase activity to corrosion of steel was assessed by using mixed populations of sulfate-reducing bacteria isolated from corroded and noncorroded oil pipelines. Biofilms which developed on the steel studs contained detectable numbers of sulfate-reducing bacteria (10 increasing to 10/0.5 cm). How…
Luminescent europium(3+), terbium(3+) and gadolinium(3+) complexes of a branched-triazacyclononane ligand containing three 2,2'-bipyridine units
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescent europium(3+), terbium(3+) and gadolinium(3+) complexes of a branched-triazacyclononane ligand containing three 2,2'-bipyridine unitsLuca Prodi, Mauro Maestri, Raymond Ziessel, and Vincenzo BalzaniCite this: Inorg. Chem. 1991, 30, 20, 3798–3802Publication Date (Pr…
New Methods For Electronic Structure Calculations on Large Molecules
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Use of Methylene Blue and Crystal Violet for Determination of Exchangeable Cations in Montmorillonite
Abstract A procedure for the determination of cation exchange capacity (CEC) and the amounts of exchangeable cations adsorbed to montmorillonite is proposed. The method consists of a single incubation of the clay in a suspension containing a low concentration of an organic dye of large binding affinity, followed by an…
Stabilization of the defect ("lacunary") complex polymolybdophosphate, PMo11O397-. Isolation, purification, stability characteristics, and metalation chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of the defect ("lacunary") complex polymolybdophosphate, PMo11O397-. Isolation, purification, stability characteristics, and metalation chemistryLucille A. Combs-Walker and Craig L. HillCite this: Inorg. Chem. 1991, 30, 21, 4016–4026Publication Date (Print):Oct…
The Effects of Crushing Speed on the Energy-Absorption Capability of Composite Tubes
The energy-absorption capability as a function of crushing speed was determined for Thornel 300-Fiberite 934 (Gr-E) and Kevlar-49-Fiberite 934 (K-E) composite material. Circular cross section tube specimens were crushed at speeds ranging from 0.01 m/sec to 12 m/sec. Ply orientations of the tube specimens were [0/± θ]…
Photoreduction of Hexavalent Chromium during X‐Ray Photoelectron Spectroscopy Analysis of Electrochemical and Thermal Films
Cr spectra obtained by x‐ray photoelectron spectroscopy (XPS) of corrosion product layers is critically examined for evidence of photoreduction of hexavalent species. Tetravalent and trivalent decomposition products are identified, and methods of curve fitting and analysis are discussed. Disagreement between x‐ray abs…
Structure and magnetic ordering of a ferrimagnetic helix formed by manganese(II) and a nitronyl nitroxide radical
A chain compound of formula Mn(hfac)2NITPhOMe, where hfac = hexafluoroacetylacetonato and NITPhOMe = 2-(4-methoxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide, was synthesized, and the X-ray analysis showed that it crystallizes in the trigonal acentric P3(1) space group with a = 11.131 (3) angstrom, c = 20.846…
Solution structure elucidation of early transition metal polyoxoalkoxides using oxygen-17 NMR spectroscopy
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution structure elucidation of early transition metal polyoxoalkoxides using oxygen-17 NMR spectroscopyV. W. Day, T. A. Eberspacher, W. G. Klemperer, C. W. Park, and F. S. RosenbergCite this: J. Am. Chem. Soc. 1991, 113, 21, 8190–8192Publication Date (Print):October 1, 19…
Off-center displacement of the Nb ions below and above the ferroelectric phase transition ofKTa0.91Nb0.09O3
We have measured the off-center displacements of the Nb ions in ${\mathrm{KTa}}_{0.91}$${\mathrm{Nb}}_{0.09}$${\mathrm{O}}_{3}$ as a function of temperature both below and above the ferroelectric transition temperature ${\mathit{T}}_{\mathit{c}}$=85.6 K. The purpose of these measurements was to elucidate the basic nat…