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 P-supplying power of the fine-textured soils from Abitibi-Temiscaming (Quebec, Canada) has never been investigated. Anion exchange membranes (AEM), the electro-ultrafiltration (EUF) technique and chemical extractions were used to describe their P status. Phosphorus was desorbed from four soils that had received 52…
Encapsulation of silica nanoparticles was performed by dispersion polymerization of styrene, butyl acrylate and butyl methacrylate in aqueous alcoholic media. Following previous works1-3), the silica beads were first modified by reacting on their surface the 3-trimethoxysilyl propyl methacrylate coupling agent (MPS).…
Abstract Vascular corrosion casting has been used for about 40 years to produce replicas of normal and abnormal vasculature and microvasculature of various tissues and organs that could be viewed at the ultrastructural level. In combination with scanning electron microscopy (SEM), the primary application of corrosion…
The action of pressure-radiation (or Bjerknes) forces on gas bubbles is well understood. This paper studies the analogous phenomenon for vapor bubbles, about which much less is known. A possible practical application is the removal of boiling bubbles from the neighborhood of a heated surface in the case of a downward…
Single-crystal MgO is a good candidate substrate for growing metal oxide films, even though it has a few drawbacks, such as surface degradation caused by its easy reaction with H 2 O and CO 2 and high concentration of impurities originating from the method by which it is grown. We propose a thermal annealing carried o…
The photophysical properties of a ring B benzoporphyrin derivative 1,3-diene dimethylester were investigated in solution (waterDMSO mixtures). At low proportions of water in DMSO, the diester obeys Beer's law at all pH values and ionic strengths investigated. For solvent systems containing more than 30% water, the ex…
We present a method for near-field analysis of ultrashort optical pulse propagation in periodic structures-including subwavelength and resonant grating structures-based on the integration of Fourier spectrum decomposition and rigorous coupled-wave analysis (RCWA). We discuss the spectral decomposition, including consi…
Temperature modulated DSC (TMDSC) in the frequency range from 10–3 Hz to 3.4 10–2 Hz and dielectric spectroscopy in the frequency range from 10–2 Hz to 106 Hz is employed to analyze the temperature dependence of the relaxation rates of the α- and of the δ-relaxation of a liquid crystalline polymethacrylate having a de…
Several solvates of LiBH4 with amines have been prepared and characterized by X-ray structure determinations. LiBH4·3H2NPh (1) is monomeric with a triply bridging BH4 group. LiBH4·2en (3) is shown to be an ionic compound containing chains of cationic [Li(en)2)]+ units. In contrast, the BH4 group of LiBH4·triene (4) fo…
Two polyhydroxyalkanoate synthase genes, phaC1 from Pseudomonas pseudoalcaligenes HBQ06 and phaC2 from Pseudomonas nitroreducens 0802, were cloned using a PCR cloning strategy based on the type II pha loci property of Pseudomonas strains. The complete open reading frames (ORFs) of phaC1 (P. nitroreducens HBQ06) and ph…
Abstract A new nonlinear optical (NLO) borate crystal Na3La2(BO3)3 (sodium lanthanum borate, NLBO) has been discovered. The bar-shaped crystal with sizes up to 8 × 3 × 2 mm3 was grown by the Top-Seeded Solution Growth (TSSG) method using Na2CO3–H3BO3–NaF as fluxes. The measurement of the infrared spectrum indicated th…
La 0.5 Sr 0.5 MnO 3 thin films were deposited onto sapphire substrates by means of the pulsed-laser deposition technique. These films were characterized by several techniques including x-ray diffraction, Rutherford backscattering spectrometry, energy-dispersive x-ray, atomic-force microscopy, scanning electron microsc…
Abstract 4-Dialkylamino-2-hydroxychalcones [3-(4-dialkylamino-2-hydroxyphenyl)-1-(substituted phenyl)-2-propen-1-ones] undergo reversible E/Z-photoisomerization in good quantum yields (0.2–0.4) in neutral aprotic solvents. The absorption bands of the photo-Z-isomers are significantly red-shifted from the E-isomers. By…
The optimum technique of finishing silk fabric with EPSIA (a silicone‐containing epoxy crosslinking agent) has been investigated through single factor experiments and orthogonal design. Treatment parameters such as finishing agent concentration, catalyst concentration, steaming temperature and time have been investiga…
Beryllium and its compounds are extremely toxic, but the biological mechanism of their toxicity is largely speculative. Beryllium is the second lightest metal after lithium and it is a component of materials indispensable in today's nuclear, aerospace and electronic industries. Concern about possible pollution by bery…
Ammonium fixation by soil clays may influence N availability to plants; however, the nature of the clay minerals responsible for NH4-fixation is unclear. The first objective of this study was to investigate how ammonium concentration and temperature affect ammonium fixation. The second objective was to determine wheth…
Abstract We have fabricated a textured monocrystalline Si solar cell with a thickness of 15·5 μm and a confirmed efficiency of 12·2% using porous silicon (PSI) for layer transfer. The PSI process avoids photolithography and high‐temperature oxidation. The cell has a surface that is textured with randomly positioned in…
The novel cycloaliphatic epoxide 3,4-epoxycyclohexylmethyl-2′,3′-epoxycyclohexyl ether (II) containing an unsymmetrical epoxycyclohexyl moiety linked via an ether bond, and its precursor 3-cyclohexene-1-methyl-2′-cyclohexene ether (I) were synthesized. Their structure was confirmed by means of elemental analysis, FT-I…
A novel transparent conducting bixbyite solid solution In 2−2 x (Cd,Sn) 2 x O 3 (0 < x < 0.34 at 1175°C) has been discovered. Four‐point dc‐conductivity varies widely with x and the [Sn]/[Cd] ratio with a maximum in excess of 1800 S/cm ( x = 0.05, [Sn]/[Cd] = 9) and a minimum too low to be measured ( x = 0.05, […
The author reviews the interaction of micro bubbles with ultrasound. First, the action of acoustic radiation pressure on bubbles is discussed in contrast with that on small particles noting the concept of Bjerknes force, resonant bubbles and nonlinear oscillation of bubbles. In the past decade, sonoluminescence, light…