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。
Hydrogen absorbed from the test environment was detected experimentally from an Al–4.9%Zn–2.2%Mg–1.3%Cu alloy deformed in laboratory air, which is a direct evidence of hydrogen embrittlement. The alloy exhibited grain boundary embrittlement when deformed at a strain rate of 10−7 s−1 in laboratory air and hydrogen beha…
The crystals of ferroelectric-semiconductor Sn2P2S6 exhibit a strong piezoelectric effect. We present measurements of ultrasonic and piezoelectric properties of other crystals of the Sn2P2S6 family: i.e., Sn2P2Se6 and CuInP2S6. The acoustoelectric method was applied to measure electromechanical coupling parameters in…
Poly(2,3,5,6-tetrafluoro-1,4-phenylenevinylene) (PTFPV) was prepared for the first time by the Stille cross-coupling reaction and the resulting material was characterized through MALDI-TOF mass spectrometry, employing a novel sample preparation protocol suitable for insoluble compounds; preliminary optical and electro…
Systematic studies of nickel tungstate thin film, amorphous and polycrystalline powders were performed by X-ray absorption spectroscopy at the Ni K and W L1,3 edges, X-ray diffraction and Raman spectroscopy. We found that in spite of the similarity of the local environment around nickel and tungsten ions in all three…
Previously, we showed that liposomes with surface-attached anti-CD19 were internalized into human B lymphoma cells through receptor-mediated endocytosis, resulting in improved anti-tumor efficacy 1-2 . In order to further increase the efficacy of antineoplastic drug-containing liposomes, we have taken advantage of thi…
The morphological evolution of isolated individual single crystals deposited on solid substrates was investigated during annealing experiments using in situ and ex situ atomic force microscopy techniques. The crystal morphology changed during annealing at temperatures slightly above the original crystallization temper…
Several layered double hydroxides (LDHs) containing metals of different nature intercalated with benzoate anions have been synthesised in order to study the O-alkylation reaction of the interlayered species with alkyl halide in dry media conditions. In all the cases, the expected ester was obtained with good yield (>6…
The synthesis and liquid crystalline behaviour of several sixteen-branched dendrimers based on poly(amidoamine) (PAMAM) and poly(propyleneimine) (DAB) are reported. Mono-, di- and trialkoxybenzoyloxysalicylaldehydes are used as mesogenic promotor moieties and are attached at the peripheral amino groups of the pre-exis…
A DNA–polyaniline complex has been successfully prepared by the photopolymerization of dimeric aniline via photocatalytic reaction with Ru(bpy)32+ complex in the presence of DNA , a reaction which occurs, even in solution at pH 3.0–6.0, due to the specific local “lower-pH” environment provided by DNA.
Two new steroid derivatives, (22E,24R)-3alpha-ureido-ergosta-4,6,8(14),22-tetraene (1) and (22E,24R)-5alpha,8alpha-epidioxyergosta-6,9,22-triene-3beta-ol 3-O-beta-D-glucopyranoside (2) were isolated from the fruit bodies of Chlorophyllum molybdites (Agaricaceae). The structures were established by spectroscopic and ch…
The complexation of the new mixed thia–aza–oxa macrocycle 5-oxa-2,8-dithia[9](2,9)-1,10-phenanthrolinophane (L) containing the 1,10-phenanthroline unit with NiII, PdII, PtII, RhIII and RuII has been investigated. The results have been compared with those obtained with the structurally related ligand 2,5,8-trithia[9](2…
Alkane (petroleum ether) vapor plasma technique was used for surface modification of chitosan membranes to control their permeation rate of water-soluble drugs and metabolites. Water contact angles of the chitosan surface increase from 13° to 23° after plasma treatment at 93 W for 60 min, and from 13° to 26° after pla…
The complex dielectric constant of 4- n -pentyl-4 ′ -cyanobiphenyl (5CB) was measured between 0.0001 Hz and 1 kHz in nematic and isotropic phases. Dielectric relaxation due to space-charge polarization was observed for both phases. In the nematic phase, the diffusion coefficient D ⊥ and the mobility µ ⊥ of ions in 5CB…
The surface morphology of polypyrrole (ppy) films prepared by potentiostatic and voltammetric methods at the platinum electrode was studied by ex situ atomic force microscopy (AFM). The study was mainly focused on the early stages of polymer film growth up to a film thickness of 30 to 50 nm. AFM analysis revealed that…
The aim of the present study was to develop polyamide 6 membrane blended with gelatin and chondroitin sulfate using the phase precipitation method and evaluate its in vitro biocompatibility. Morphology of membranes was studied by laser scanning confocal microscopy which allowed the nondestructive visualization of inte…
Recently, an electron backscatter diffraction (EBSD) system was developed that uses a 1024 x 1024 CCD camera coupled to a thin phosphor. This camera has been shown to produce excellent EBSD patterns. In this system, crystallographic information is determined from the EBSD pattern and coupled with the elemental informa…
The combustion process is an important powder preparation process by which several hundred compounds may be prepared. The process is, in the simplest sense, the exploitation of an exothermic and usually very rapid chemical reaction to produce a useful material. It is a versatile process to synthesize any kind of singl…
Treatment of [WO2Cl2(DME)] with 2-pyridylalkoxo NO-bidentate ligands [HLn (n = 1–5)] in the presence of n-BuLi or 2-pyridylthiolato NS-bidentate ligands [LiLn (n = 6, 7)] gave the corresponding dioxotungsten(VI) complexes [WO2(Ln)2] (n = 1–7). The new compounds were spectroscopically characterised and the molecular st…
Glass slides were chemically etched with nitric acid using five different methods. We investigated the effects of chemical etching treatments on such properties as chemical composition, surface roughness, transmittance, and thermal stability of the glass. Sodium, calcium, and aluminum atoms in the surface of the glass…
Polyester-polyether segmented block copolymers of poly[(butylene succinate)-co-poly(butylene terephthalate)] (PBS–PBT) and poly(tetramethylene glycol) (PTMG) (Mn = 2000) with various compositions were synthesized. PBT content in the PBS was adjusted to ca. 5 mol %. Their thermal and mechanical properties were investig…