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 simulated annealing approach to structure solution from powder diffraction data, as implemented in the DASH program, is easily amenable to parallelization at the individual run level. Modest increases in speed of execution can therefore be achieved by executing individual DASH runs on the individual cores of CPUs.
To develop a novel coating material for coronary covered stents, we prepared a kind of composite membrane which contains polyvinyl alcohol (PVA) and porcine small intestinal submucosa (SIS) powders crosslinked and heparinized by N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimid…
Micropeptins C (1), D (2), E (3), and F (4) have been isolated from the freshwater cyanobacterium Microcystis aeruginosa (NIES-100). The structures were elucidated by analyses of MS, NMR spectra, and chemical degradation. Micropeptins C, D, E, and F inhibited chymotrypsin with IC(50)'s of 1.1, 1.2, 1.0, and 1.5 microg…
New, biodegradable poly(L-lactide) disulfides, PLLA-SS-PLLA, were first prepared through the DMAP-catalyzed ring-opening polymerization of L-lactide with a dihydroxyethyl disulfide initiator, and were further catalytically reduced into thiol-end-functionalized poly(L-lactide)s, HO-PLLA-SH, with a tributyl phosphine ca…
The main objective of this study was to study the effects of length, alignment and diameter distribution of the carbon nanotubes (CNTs) on the percolation threshold of nanocomposites using computational simulations. Furthermore, the effects of the aforementioned parameters on the efficiency of the produced networks ar…
In this study, the potential of recycled polyethylene terepthalate (rPET) as a well-defined reinforcing material for the in situ microfibrillar reinforced composite was investigated in comparison with that of liquid crystalline polymer (LCP). Each dispersed phase (LCP or rPET) was melt blended with polypropylene (PP)…
Clay/epoxy nanocomposites were fabricated using shear mixing to determine the increase in mechanical properties over those of pure epoxy. The effectiveness of the fabrication process was improved and explained in detail to provide composites researchers with the ability to fabricate thermosetting nanocomposites effici…
Cyclic and linear oligoamides were extracted with methanol in 0.1−0.9% yield from condensation polymers of hexamethylenediamine or m -xylylenediamine with mixtures of adipic, isophthalic, and terephthalic acids. The parent polymers and methanol extracts were analyzed using mass spectrometry, and the extracts, in which…
The success of cancer chemotherapy is largely dependent on the efficient anticancer drug accumulation in target tumor tissues and cells so as to inhibit the proliferation of the cancer cells. Recently, some biocompatible nanomaterials have been utilized as drug target delivery systems and have shown the great potentia…
Complexes [(A-α-AsW9O34)2]12− (1) and [(PhSnIVOH)3(A-α-AsW9O34)2]12− (2) were synthesized by the reaction of tin(II) sulfate and phenyltintrichloride with in aqueous solution. Complex [(HOSnIVOH)3(AsW9O34)2]12− (3) is synthesized by the oxidation of 1 by Br2. The complexes were characterized by elemental analysis, IR,…
Titanosilicate (1.5 wt.% Ti) with very well-ordered MCM-48 mesostructure was synthesized using fumed silica and titanium isopropoxide as silicon and titanium sources, respectively. It was successfully used as a new catalyst for the mild oxidation of S-containing organic compounds with H 2 O 2 . Recent results obtained…
Novel π-conjugated coil-rod-coil triblock oligomers containing optoelectronic active oligoaniline segments were synthesized. The block oligomer can self-assemble into diverse aggregating morphologies including spherical micelles and thin-layer vesicles in THF, which is found associated with the removing of the protect…
Long-range quasiperiodic patterns are found in scanning tunneling microscopy (STM) images of double-walled carbon nanotubes (DWNTs) on top of the atomic images of six-membered carbon rings of the outer tubes. By comparing the results of first-principles calculations on model DWNTs, we conclude that they are moir\'e pa…
Abstract PET/PEN blends were prepared over the full composition range via a melt mixing process under various processing conditions. This resulted in transesterification reactions and formation of copolymer structures with various average sequence block lengths $(\bar L_{nPET} ,\;\bar L_{nPEN} )$ and degree of randomn…
Site-selective spectroscopy and stimulated emission experiments performed in the (4)F(3/2)-->(4)I(11/2) laser transition of Nd(3+)-doped 0.8CaSiO(3-) 0.2Ca(3)(PO(4))(2) eutectic glass are presented. The spectral features of the excitation spectra and those of spontaneous and stimulated emissions reveal the existence o…
In this work, we report the behavior of two different hemicyanines, trans-4-[4-(dimethylamino)styryl]-N-methylpyridinium iodide (HC) and 4-[4-(dihexadecylamino)styryl]-N-methylpyridinium iodide (DIA), in water/sodium 1,4-bis-2-ethylhexylsulfosuccinate (AOT)/benzene reverse micelles media using absorption and emission…
Block copolymerization of a seven-membered cyclic carbonate (5 S,6 S )-dimethyl-5,6-isopropylidene-1,3-dioxepin-2-one (ITC) with ε-caprolactone in “one-shot feeding” is reported. The cyclic carbonate monomer ITC was synthesized from naturally occurring l -tartaric acid in three steps. Three catalysts—stannous octanoat…
This work reports the synthesis of new polymer-titania hybrids, where the organic phase is constituted by polyesters such as poly(-caprolactone), poly(d,l-lactic acid), and poly(l-lactic acid). In these hybrids, very strong interaction between the organic and inorganic domains is obtained through transesterification o…
In the present study, the results of the numerical implementation of a mathematical model of a planar anode-supported SOFC are reported. In particular, model results are validated and discussed when the fuel is a mixture of hydrogen and carbon monoxide, focusing on the importance of simulating direct oxidation of carb…
The new compounds K(2)Ln(2)As(2)Se(9) (Ln = Sm, Gd) were obtained by applying the reactive flux method. The structure consists of a three-dimensional (3D) [Ln(2)As(2)Se(9)](2-) framework with K(+) ion-filling tunnels running along the b axis. The two unique Ln(3+) cations are coordinated by two Se(2)(2-) dumbbells, tw…