Moessbauer Spectroscopy and Its Recent Application to Silicate Mineralogy.
Mossbauer spectroscopy has been widely used to determine oxidation states and site occupancies of 1991年10月4日
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Varied line-space gratings and applications (invited)
This paper presents a straightforward analytical and numerical method for the design of a specific type of varied line-space grating system. The mathematical development will assume plane or nearly plane spherical gratings that are illuminated by convergent light, which covers many interesting cases for synchrotron ra…
Difference between guanidinium chloride and urea as denaturants of globular proteins: The possibility of application to improved refolding processes.
The difference in the effect of guanidinium chloride (GdnHCl) and urea on the unfolding of hen egg-white lysozyme was evaluated mostly by means of circular dichroism(CD) measurements at pH 6.2 and at room temperature. The CD spectrum of lysozyme in 6M GdnHCl revealed the unfolded state, but that in 8M urea was almost…
Poly(Acrylic Acid)‐Starch Composites. A Key for Improving Sizeability and Desizeability of Starch from Cotton Textiles
Abstract Maize and rice starches were independently polymerized with acrylic acid (AA) using potassium permanganate/citric acid initiation system. The dependence of total conversion (grafting and homopolymerization) on AA, potassium permanganate and citric acid concentrations, time and temperature of polymerization an…
Purification and Characterization of Lysozyme from Ayu Skin Mucus.
Two different types of lysozyme, types I and II, that lysed the lyophilized cells of Micrococcus lysodeikticus were purified from the skin mucus of ayu Plecoglossus altivelis by sequential column chromatographies on SP-Toyopearl 650M, Heparin Sepharose CL-6B, Mono S HR 5/5, and Superose 12HR 10/30. The types I and II…
Computation of low-energy crystalline arrangements of cellulose triacetate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComputation of low-energy crystalline arrangements of cellulose triacetateRomain M. Wolf, Eric Francotte, Leslie Glasser, Istvan Simon, and Harold A. ScheragaCite this: Macromolecules 1992, 25, 2, 709–720Publication Date (Print):January 1, 1992Publication History Published o…
‘Corrosion resistance of technical ceramics’
"‘Corrosion resistance of technical ceramics’." British Corrosion Journal, 27(1), p. 25
Thermal degradation of polybutadiene, 2. Overall thermal behaviour of polymers with different microstructures
Abstract The thermal decomposition at volatilization temperatures of polybutadiene samples with different initial microstructures was investigated i. vac. and under nitrogen atmosphere by thermogravimetry, differential scanning calorimetry, thermal volatilization analysis and infrared spectroscopy. The decomposition o…
Development of a B4C/Al Cermet for Use as an Improved Structural Neutron Absorber
Abstract An aluminum and boron carbide cermet was evaluated for possible application as a neutron absorbing material where structural strength and rigidity will be required. The boron carbide/aluminum composite possessed unique continuous interconnected ceramic and metal phases. Traditional bocon containing neutron ab…
Ein Germaniumsesquisulfid der Zusammensetzung (tBuGe)4S6 ohne Adamantanstruktur
Zwei schwefelverbrückte, nahezu planare Ge 2 S 2 ‐Vierringe liegen im neuartigen Sesquichalcogenid 1 vor, das, sich bei der Umsetzung von t uGeCl 3 mit (NH 4 ) 2 S 5 bildet. 1 lagert bei thermischer Belastung in das bereits bekannte ( t BuGe) 4 S 6 ‐Isomer mit Adamantangerüst um. Wird dieses direkt aus t BuGeCl 3 und…
Effect of Work Roll Materials and Progress of Manufacturing Technology on Cold Rolling and Future Developments in Japan.
As the fundamental tools in the cold rolling, work rolls have been greatly affected on the quality, production cost and productivity. The issue of the technological innovation about work roll manufacturing have been changed from the original, which was concerned with steel making and ingotting techniques for minimizin…
Pressure-induced phase transformations in alkali-metal hydrides calculated using an improved linear-muffin-tin-orbital–atomic-sphere-approximation energy scheme
A scheme for the calculation of total energies from first principles is described which is intermediate between the popular linear muffin-tin-orbital method in the atomic-sphere approximation (LMTO-ASA) and an exact full-potential treatment. The local-density total energy is evaluated accurately for the output charge…
Spectroelectrochemical observation of poly(benzo[c]thiophene) n- and p-doping
The deposition and properties of electropolymerised poly(benzo[c]thiophene)(PBCT) films have been studied using in situ UV–VIS spectroscopy. Film stability is enhanced by ‘conditioning’ in background electrolyte [0.2 mol dm–3 tetraethylammonium tetrafluoroborate (TEAT)–CH3CN]; this involves a single potential cycle be…
The Effect of Phosphorus on the Radiation-Induced Microstructure of Stabilized Austenitic Stainless Steels
This paper deals with the correlation of irradiation behavior and microstructural evolution of mono-(Ti) and multi-(Ti, Mb, V) stabilized Type 316 (UNS S31600) stainless steels with different phosphorus levels. These steels, in the 20% cold-worked condition, were irradiated between 400 and 500°C up to 100 dpa in the P…
Evaluation of properties and special features for high-temperature applications of rhenium
Sixty‐six years have passes since rhenium was discovered in June 1925 by husband‐and‐wife team Walter and Ida Noddack. The rapid development of rhenium is due to the unique properties of the metal and its alloys. Rhenium has a hexagonal close packed structure as opposed to the body centered cubic structure of other re…
The Effects of Relative Humidity on Some Physical Properties of Modern Vellum: Implications for the Optimum Relative Humidity for the Display and Storage of Parchment
The effects of different relative humidities on some physical properties of three types of calfskin parchment (vellum) were investigated. Standard samples were subjected to (1) tensile fracture, and (2) measurement of the force that developed when the restrained samples were subjected to step decreases in relative hum…
Infrared Absorption Coefficients of Silica Glasses
The absorption coefficient values of several silicate glasses in the IR radiation range were determined. Four methods were employed in this study: (1) direct transmission by CO 2 laser, (2) direct transmission through ultrathin sections using an IR spectrometer, (3) glass particle dispersions in KBr pressed pellets, a…
Investigations of Tribological Characteristics of Solid Lubricants Exposed to Atomic Oxygen
At low earth orbit (LEO) altitudes of 100–1000 km, pressures are relatively high (10−5 Pa) and the residual atmosphere consists primarily of atomic oxygen (AO). Spacecraft orbital velocities, approximately 8 km/sec, at LEO altitudes result in a reactive chemical environment with 5eV AO. Long-term (10–30 years) operati…
Modulation of Tc–NX (X = O or S) bonds by π-acceptor ligands
Transfer of a sulfur atom from S2Cl2 to cis-[TcN(Cl)(phen)2]PF6(phen = 1,10-phenanthroline) yields cis-[Tc(NS)Cl(phen)2]PF6, which crystallizes in the triclinic space group, P(no. 2), with cell parameters a= 9.850(3), b= 16.293(3), c= 8.349(2)Å, α= 100.06(2), β= 93.84(3) and γ= 106.96(3)°. The Tc–NS bond length is 1.7…
On the Inhomogeneity of Refractive Index of CaF2 Crystals for High Performance Optics
Abstract CaF 2 ‐crystals belong to the standard materials, used in optical precision instruments. As well as the traditional optics for microscopy new developments in the field of DUV‐lithography (projecting lenses made out of CaF 2 and quartz) need a homogeneity of the refractive index in the order of 10 −6 , but ove…