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。
The interaction forces and fusion mechanisms of mixed zwitterionic-anionic phospholipid bilayers were measured with the surface forces apparatus. The bilayers were 3:1 mixtures of either dimyristoylphosphatidylcholine and dimyristoylphosphatidylglycerol (DMPC/DMPG) or dilauroylphosphatidylcholine and dilauroylphosphat…
The structural and electronic properties of amorphous carbon are studied with tight-binding molecular-dynamics simulations. An amorphous carbon structure with 216 atoms obtained from our simulation gives a structure factor S(Q) in very good agreement with the results of neutron scattering from a sputtered a-C sample.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWrong-way behavior of packed-bed reactors: influence of an undesired consecutive reactionAndrew Il'in and Dan LussCite this: Ind. Eng. Chem. Res. 1993, 32, 2, 247–252Publication Date (Print):February 1, 1993Publication History Published online1 May 2002Published inissue 1 Fe…
A variety of geometrical, crystal chemical, statistical, and quantum-mechanical theoretical constructs provide criteria for understanding trends in quasicrystalline relative stabilities. The quantum-mechanical constructs also explain trends in transport properties. These trends have predictive value.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiving carbocationic polymerization. 55. Living polymerization of indeneJoseph P. Kennedy, Sanjeev Midha, and Balazs KeszlerCite this: Macromolecules 1993, 26, 3, 424–428Publication Date (Print):February 1, 1993Publication History Published online1 May 2002Published inissue…
The double bonds and aromaticity that impart high thermal stability in fibers often increase the absorption of LTV radiation, resulting in greater susceptibility to photodegradation. This study compares the resistance of three high-performance fibers (Nomex aramid, Kynol novoloid, and PBI) to accelerated light exposur…
The second law of thermodynamics states that the entropy of an isolated system increases until it reaches a maximum. Entropy is traditionally associated with disorder but recent experiments, computer simulations and theories have illustrated how the disordering effect of entropy can lead to highly ordered superstructu…
Abstract Poly(N 1 ,N 3 ‐dimethylbenzimidazolium) (PDMBI) salt and poly(N 1 ‐methylbenzimidazole) (PMMBI) were synthesized by methylation of commercial polybenzimidazole [poly‐2,2′‐( m ‐phenylene)‐5,5′‐bibenzimidazole (PBI)]. First, the N‐lithium salt of polybenzimidazole was formed by treating polybenzimidazole soluti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, characterization, stability, aqueous surface activity, and aqueous solution aggregation of the novel, cationic siloxane surfactants (Me3SiO)2Si(Me)-(CH2)3+NMe2(CH2)2OR X- (R = hydrogen, acetyl, N-phenylcarbamyl; X = chloride, bromide, iodide, nitrate, methyl sulfa…
The crystal structure of synthetic tolbachite, CuCl 2 , has been refined by the Rietveld method using an X-ray powder diffractometer modified for atmospheric control. The structure is monoclinic, space group C2/m, a=6.9038, b=3.2995, c=6.824A, β=122.197°, Z=2, with Cu 2+ at (000), and Cl - at [0.5048,0,0.2294]. The st…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnionic homopolymerization and block copolymerization of 4-vinylpyridine and its investigation by high-temperature size-exclusion chromatography in N-methyl-2-pyrrolidinoneSunil K. Varshney, Xing Fu Zhong, and Adi EisenbergCite this: Macromolecules 1993, 26, 4, 701–706Public…
We present ab initio calculations of x-ray-absorption fine structure for the Re ${\mathit{L}}_{3}$ and ${\mathit{L}}_{1}$ edges in crystalline ${\mathrm{ReO}}_{3}$ based on an exact curved-wave multiple-scattering approach. Good agreement between theoretical and experimental data has been found for both edges. We show…
Proteins exposed to ionizing radiation suffer both reversible and irreversible effects. Reversible effects are defined as those which disappear in a short period of time after the removal of the radiation field and without further treatment of the sample. Irreversible effects are those which cause a permanent alterati…
The Hall-Petch relation, developed originally for single-phase alloys, has been extended to alloys containing two ductile phases. The extended Hall-Petch relation can separate the contributions from the different kinds of boundary to the overall efficiency of grain and phase boundaries as obstacles to dislocation moti…
Abstract Surface Raman spectral studies of triphenylmethane dyes on colloidal silver were carried out. An assessment of the surface and solution spectra led to the conclusion that the dye molecules are most likely lying parallel to the surface of the sol and adopting C 3 symmetry. The major vibrational changes suggest…
A high‐strength machinable glass‐ceramic was prepared by controlling the crystallization of ZrO 2 ‐containing Ca 0.43 K 0.14 Mg 3 (Si 3 AlO 10 )F 2 glass. A unique microstructure of the glass‐ceramic was observed, using transmission electron microscopy (TEM): zirconia particles of nanometer size, 20–50 nm, were embedd…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimulated annealing on free energy surfaces by a combined molecular dynamics and Monte Carlo approachBruce TidorCite this: J. Phys. Chem. 1993, 97, 5, 1069–1073Publication Date (Print):February 1, 1993Publication History Published online1 May 2002Published inissue 1 February…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPalladium-catalyzed reaction of 5-methylene-1,3-dioxolan-2-ones. A new access to and reactivity of oxatrimethylenemethane-palladiumKouichi Ohe, Hideki Matsuda, Toshihisa Ishihara, Sensuke Ogoshi, Naoto Chatani, and Shinji MuraiCite this: J. Org. Chem. 1993, 58, 5, 1173–1177P…
A series of N, N-di-n-alkyl-N,N-dimethylammonium bromides was synthesized and characterized. Its thermotropic liquid-crystalline behaviour was studied by differential scanning calorimetry, polarizing optical microscopy and X-ray diffraction. A novel smectic mesophase was thus identified, in which the lateral packing o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFoam breakdown by hydrophobic particles and nonpolar oilRobert Aveyard, Philip Cooper, Paul D. I. Fletcher, and Christine E. RutherfordCite this: Langmuir 1993, 9, 2, 604–613Publication Date (Print):February 1, 1993Publication History Published online1 May 2002Published inis…