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 causes and mechanism of hygroscopicity of binary ultraphosphate glasses are difficult to study. This is due, in particular, to the formation of a thin layer of partially hydrolyzed glass with physisorbed water. 1H MAS NMR is more suitable than IRTF spectroscopy to investigate very hygroscopic glasses. In absence o…
Le matériel original de Gomphonema rhombicum M. SCHMIDT, 1904 a pu être identifié et examiné en microscopie optique. L'observation de quelque 210 individus a donné lieu à une diagnose et une illustration photographique de l'espèce. Un lectotype est proposé parmi les isotypes répartis dans diverses collections.
Abstract The prospects for developing efficient molecular devices for all‐optical switching are discussed on the basis of measurements of the second molecular hyperpolarizability coefficient, γ, responsible for third harmonic generation. More than twenty structurally different organic compounds comprising organic meta…
MoO2(acac)2 has been used as a precursor for the one-step MOCVD of silica- and zirconia-supported MoO3. Pure films were obtained by suitable control of the deposition parameters. The films were characterised by UV-VIS spectroscopy, XRD, SEM, wavelength-dispersive X-ray fluorescence analysis and XPS. Silica-supported M…
The structures of the electronic energy bands of LiB3O5, Li2B4O7 and KBe2BO3F2 solid compounds, containing both ionic and covalent bonds, have been calculated using the INDO/S method first, and the dynamic refractive indices and frequency-dependent second susceptibilities have been obtained in terms of INDO/SCI follow…
The authors investigated the in-situ processing temperatures and effects of various formulation additives on the formation of ultraviolet (UV) excitable chromophores in the thermal lamination and curing of ethylene-vinyl acetate (EVA) encapsulants for solar cells. A programmable, microprocessor-controlled, double-bag…
The solubilities of o -chlorobenzoic acid, p -chlorobenzoic acid, o -nitroaniline, and p -nitroaniline in dimethylformamide (DMF) + water at different compositions are reported at 303 K. At this temperature, p-chlorobenzoic acid is more soluble than o-chlorobenzoic acid in DMF + water with the difference in solubiliti…
Cu–Al–Ni shape memory alloys present a minimum in their elastic modulus during the martensitic transformation, and the values in both the martensite and high temperature β-phase, follow the same trend. The addition of Ti, as grain refiner, produces χ-phase precipitates which substantially modify the elastic modulus pr…
新しいアモルファス分子材料の創製を目指して, 新規なπ電子系分子1, 3, 5-トリ (N-カルバゾリル) ベンゼン (TCB) を設計・合成し, そのガラス形成ならびにガラスからの緩和過程を検討した. その結果, TCBは, 溶融サンプルを冷却することにより, 容易にガラスを形成することを見いだした. CPKモデルから, TCBは, 三つのカルバゾール環が中心ベンゼン環の平面から著しくねじれた非平面構造を有していることが示唆され, このことがガラス形成を容易にしていると考えられる. TCBガラスは, カルバゾール環を含まない類似化合物1, 3, 5-トリス (4-メチルフェニルフェニルアミノ) ベンゼンのガラスと比較して, 格段…
The effect of Zr addition to austenitic stainless steels on the suppression of radiation induced Cr segregation at grain boundaries under 400 keV He+ irradiation was studied. Type 316L stainless steel and steels with addition of 0.07, 0.21 or 0.41 mass% Zr were kept at 1,423K for 30 min, and then they were quenched in…
Use of 19F NMR to Probe Protein Structure and Conformational Changes, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/biophys/25/1/annurev.bb.25.060196.001115-1.gif
Thin poly(vinylidene fluoride) films were irradiated with swift heavy ions in order to induce along the ion path the formation of radicals which can initiate the grafting of styrene. Using size exclusion chromatography, we have studied the influence of irradiation (dose, type of ion) and kinetic (grafting time, monome…
An in-house anomalous X-ray scatterig (AXS) method has been done for determiningcation distribution in ZnFe2O4, NiFe2O4 and NiAl2O4 spinels using the anomalous dispersion effect near the K absorption edges of Zn and Ni. When introduced the ratio (x) of the number of divalent cations of M element, MA, residing in the t…
Perhaps the single most important property controlling the mechanical performance of a piece of wood is its density. Density is the ratio of mass to volume.
The atomic structure of monolayer graphite formed on a Ni (111) surface was investigated by means of LEED intensity analysis. We measured the I-V curves of the (1, 0), (0, 1) and (1, 1) diffraction spots from a 1×1 atomic structure, and analyzed them by using the Van Hove's analytical program based on dynamical theory…
(1) D. C. conductivity of Mg(PO3)2 glasses at room temperature was drastically enhanced from -1015S·cm-1 to -5×10-4S·cm-1 and the activation energy of the conduction was greatly reduced from 1.1eV to 0.18eV upon implantation of 120keV H+ to a fluence of 1×1018cm-2. Almost the same changes in conductivities and the act…
Five different fluorinated polyimides were characterized using X-ray photoelectron spectroscopy (XPS). Elemental compositions and polyimide stoichiometries as elucidated with XPS are reported. The fluorinated polyimides derived from corresponding poly(amic acid)s were completely imidized after thermal cure at 350°C, g…
Abstract Far‐infrared and Raman scattering spectra as well as galvanomagnetic measurements of PbTe 1− x S x ( x = 0.02 and 0.05) mixed crystals in the temperature range from 10 to 300 K are presented. The far‐infrared reflectivity spectra are analysed using a fitting procedure based on the plasmon‐phonon interaction m…
Preliminary studies on the carbothermal reduction of sillimanite (Al2O3SiO2) powders are reported. The effects of various reaction parameters, e.g. reaction temperature (1550–1700 °C), C: Si molar ratio (4.5–9.0) in the reactant mixtures, the nature and source of carbon (carbon black or activated charcoal) and the rea…
Abstract A method for X‐ray interferometric investigation of the deformation field of crystal imperfections by means of double and triple interferometers is proposed. It is shown experimentally that by means of double and triple interferometers it is possible to detect segregation lines, displacement lines, and the Mo…