Materials Literature
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We present Monte Carlo simulations of surface induced disordering in a model of a binary alloy on a bcc lattice which undergoes a first order bulk transition from the ordered DO3 phase to the disordered A2 phase. The data are analyzed in terms of an effective interface Hamiltonian for a system with several order param…
We present recent Monte Carlo results on surfaces of bcc-structured binary alloys which undergo an order-disorder phase transformation in the bulk. In particular, we discuss surface order and surface induced disorder at the bulk transition between the ordered (DO3) phase and the disordered (A2) phase. An intricate int…
Raman spectroscopy of radiation-damaged natural zircon samples shows increased line broadening and shifts of phonon frequencies with increasing radiation dose. Stretching and bending frequencies of SiO 4 tetrahedra soften dramatically with increasing radiation damage. The frequency shifts can be used to determine the…
The magnetization distributions in a series of ternary intermetallic compounds based on the composition Co 2 YZ where Y is Ti, Mn or Fe and Z a subgroup-B element have been determined from polarized neutron diffraction measurements. Comparison of the magnetic structure factors with model calculations shows that the ma…
High‐precision stepped‐heating experiments were performed to better characterize helium diffusion from apatite using Durango fluorapatite as a model system. At temperatures below 265°C, helium diffusion from this apatite is a simple, thermally activated process that is independent of the cumulative fraction of helium…
Measurements of liquid−liquid equilibria were performed in order to study the suitability of triethylamine and diisopropylamine for the extractive crystallization of lithium sulfate or lithium formate from its aqueous solutions. In the temperature range studied, two liquid phases exist in all ternary-salt-saturated sy…
The transient kinetics of ethylene oxidation by oxygen over a commercial Pt/Rh/CeO 2 /γ-Al 2 O 3 three-way catalyst were modeled. Experiments were carried out in a fixed-bed microreactor with two separate inlets, enabling alternate feeding of ethylene and oxygen with frequencies up to 1 / 4 Hz. The experimental condit…
Mixed-stack structures of monovalent [Ni(dmit)2]- and planar M+(4,13-diaza-18-crown-6) (M+ = K+ or Rb+) supramolecular cation were obtained in the isostructural M+(4,13-diaza-18-crown-6)[Ni(dmit)2] salts. The mixed-stack structure decreases the effective π−π overlap of [Ni(dmit)2]- molecules, which results in the one-…
Combined small and wide angle X‐ray scattering (SAXS and WAXS) analysis was applied to purified biogenic silica of cultured diatom frustules and of natural populations sampled on marine tidal flats. The overall WAXS patterns did not reveal crystalline phases (WAXS domain between 0.07 to 0.5 nm) in this biogenic silica…
The induced-fit mechanism in Enterobacter cloacae MurA has been investigated by kinetic studies and X-ray crystallography. The antibiotic fosfomycin, an irreversible inhibitor of MurA, induced a structural change in UDP-N-acetylglucosamine (UDPGlcNAc)-liganded enzyme with a time dependence similar to that observed for…
Thermogravimetric curves and IR and UV-VIS spectra were measured for 1-butyl-3methylimidazolium based ionic liquids. The solubility of ionic liquids in several organic solvents was determined.
It is pointed out that the variation of the plasmon frequency of metal with temperatures, though generally extending to a very limited amount, could however have significant effects on the recently observed dependence of surface-enhanced Raman scattering (SERS) on substrate temperatures.
A version of a transient method for measuring specific heat, thermal diffusivity and thermal conductivity is presented. The dynamic temperature field is generated by the passage of the electrical current through a planar electrical resistance made of thin metallic foil. The heat is produced in the form of a step-wise…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Heavily Cu + -doped amorphous PbCl 2 has been obtained by quench deposition of the mixture of PbCl 2 and CuCl. Upon crystallization, the large majority of Cu + ions aggregate to form CuCl precipitates embedded in the crystalline PbCl 2 matrix. The present experiment opens up the possibility of producing densely disper…
Tryptophan analogues with unique spectral and photophysical properties offer intrinsic fluorescent probes for studying peptide−protein and protein−protein interactions. Two benzannulated indole derivatives, benz[ f ]indole and 3-methylbenz[ f ]indole, were synthesized and their fluorescence was characterized. The abso…
The effects of a partial substitution of Mo, Ga, Si or Al, respectively, for Fe on the structure and magnetic properties of Nd 8.4 Fe 87.1 B 4.5 alloy prepared by mechanical alloying have been studied in detail. The addition of 1.1 at% Mo, Si or Ga results in the improvement of the intrinsic coercivity of the nanocomp…
N-Benzoyl-L-tyrosyl-p-aminobenzoic acid hydrolase (PPH, human meprin), a zinc-metalloendopeptidase of the astacin family, consists of two similar subunits. As well as in small-intestinal epithelial cells, the enzyme is found in lamina propria leucocytes, human cancer cells and colorectal cancer tissue, making it a pot…
Laser-ablated rhenium, ruthenium, and osmium atoms react with O 2 in excess neon and argon during condensation to form the MO 2 dioxide molecules as major products. The MO 3 trioxides with D 3 h symmetry, the (O 2 )MO 2 dioxide complexes with C 2 v symmetry, and the tetrahedral MO 4 (M = Ru, Os) molecules are formed o…
We study the liquid-glass transition of the Lennard-Jones binary mixture introduced by Kob and Andersen from a thermodynamic point of view. By means of the replica approach, translating the problem in the study of a molecular liquid, we study the phase transition due to the entropy crisis and we find that the Kauzmann…