Materials Literature
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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…
An analytical methodology is developed to model the response of unidirectional ceramic matrix composites (CMCs) under monotonic and fatigue loadings at room temperature. The analysis is presented as a first step toward analyzing the fatigue behavior of CMCs at elevated temperatures. The laminate is modeled using a mod…
For the first time, the formation of paramagnetic defect centers in AlPO 4 molecular sieves has been monitored by electron spin resonance (ESR) spectroscopy. Results from ESR measurements demonstrate that the structural defects in hydrated AlPO 4 -5 and VPI-5 molecular sieves change into paramagnetic defect centers wh…
Abstract Electron paramagnetic resonance (EPR), Optical absorption and Transport properties of (NH 4 ) 2 CuCl 4 2 H 2 O single crystals have been studied. An anisotropic g tensor was observed with gl = 2.241 and g∥ = 2.081 by EPR method. The spin orbit coupling constant is found to be 540 cm −1 . The optical absorptio…
The fluorescence quenching and complexation behaviour of tetraphenylporphyrin (TPP) have been studied using fluoresence, electronic absorption spectra and the stopped-flow technique. The second-order fluorescence quenching rate constant (kq) increases in the order Ni2+ > Co2+ > Hg2+ > Sn2+ in methanol. Both Ni2+ and C…
Abstract One of the most important applications of the population balance approach to MSMPR crystallizer modelling is the recovery of crystal nucleation and growth rates data from steady‐state crystal size distributions (RANDOLPH, LARSON). A large number of studies have confirmed that both size‐dependent (growth rate…
We have examined HCN synthesis by the ammoxidation of CH 4, C 2 H 6, and CH 4 /C 2 H 6 mixtures in air or O 2 at atmospheric pressure on α-Al 2 O 3 foam monoliths coated with 1−10 wt % Pt and on Pt−10% Rh gauzes. The HCN reaction system was found to be highly sensitive to the catalyst microstructure because we observe…
Second harmonic generation decay has been used to follow the orientational relaxation of dipolar chromophores either dissolved in (guest−host) or chemically attached to (side chain) an amorphous polymer host. The guest−host system investigated is the chromophore lophine-1 in a polyimide host and the side-chain system…
A Langmuir–Blodgett film of a platinized viologen-linked porphyrin is prepared, and steady photoinduced hydrogen evolution is observed with the porphyrin under steady-state irradiation.
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionSelf-Consistent Theory of Block Copolymers with Conformational Asymmetry Vol. 26, Number 25, December 6, 1993, pp 7070−7075J. D. Vavasour and M. D. WhitmoreCite this: Macromolecules 1996, 29, 15, 5244Publication Date (Web):July 15, 1996Publication History Published o…