Materials Literature
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Different concentrations (i.e., 10, 20, 30, and 40 wt%) of Al metal are dispersed in polymethylmethacrylate (PMMA) matrix and the composite films are prepared by solution casting method. The frequency and temperature dependence of dielectric constant, dielectric loss, and conductivity of pure polymer and polymer compo…
The quality of the Electrical power is effected by many factors like harmonic contamination, due to non-linear loads, such as large thyristor power converters, rectifiers, voltage and current flickering due to arc in arc furnaces, sag and swell due to the switching of the loads etc. One of the many solutions is the us…
An extremely thermophilic bacterium, Thermus thermophilus, possesses two glutamate dehydrogenase (GDH) genes, gdhA and gdhB, putatively forming an operon on the genome. To elucidate the functions of these genes, the gene products were purified and characterized. GdhA showed no GDH activity, while GdhB showed GDH activ…
Hydroprocessing of fats and oils for the production of renewable diesel fuel is a commercial technology with more than 800 million gallons per year of announced capacity. Both co-processing with petroleum feeds and dedicated process technologies to produce a 100% renewable fuel are available with the latter providing…
We measured the magnetic field dependence of the specific heat in PrPb 3 in the field direction H ∥[100] up to H =8 T. At H =0 T, an antiferro-quadrupole ordering occurs at T Q =0.43 K, which is higher than T Q =0.4 K in previous measurements, and is evidence of the high quality of the sample. We describe a new T – H…
Tracer zero length column (TZLC) and pulsed field gradient (PFG) NMR techniques were used to study self-diffusion of toluene in two samples of SBA-15 silica. Analysis of the diffusion data allowed us to assign evaluated diffusivities to diffusion of toluene in pore systems of SBA-15 particles. It was observed that the…
The structural phase transitions, mechanical properties and electronic structures of OsO2under high pressure are systemically investigated by the first-principles plane-wave basis pseudopotential calculations. The possible pressure-induced transition sequence in OsO2may be the rutile, pyrite and fluorite phases, and t…
Leuchtet im Dunkeln: Eine durchstimmbare Singulett-Triplett-Austauschlücke wurde in optisch aktiven konjugierten Polymeren mit starker Fluoreszenz aus dem Singulett-Zustand und ausgeprägter Phosphoreszenz aus Triplett-Anregungen nachgewiesen (siehe Bild). Die Polymere wurden in organischen Leuchtdioden (OLEDs) hinsich…
The location and dynamics of the [Ru(bpy)(3)](2+) complex inside sodium bis(2-ethylhexyl)sulfosuccinate (AOT)/octane/water microemulsions were studied, over a range of droplet sizes, using magnetic resonance spectroscopy, dynamic light scattering, and molecular modeling. The T(1) magnetic resonance relaxation times of…
Abstract A novel bis( m ‐phenylene)‐26‐crown‐8‐based lariat ether (i.e., 3b ) was synthesized and characterized. It can bind paraquat derivatives more strongly than bis( m ‐phenylene)‐26‐crown‐8 in solution. It forms pseudorotaxanes with two paraquat derivatives in the solid state. N ‐Methyl substitution was found to…
The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of semiconductors and dielectrics by linearly polarized high-intensity Ti:sapphire fs-laser pulses (τ ~100 fs, λ ~800 nm) is studied experimentally and theoretically. In the experiments, two different types of LIPSS exhibiting very dif…
Rhodium complexes have potential uses in both catalysis and promoting the cleavage of C-C bonds. In order to further our understanding of these species and their potential applications, it is vital to obtain insight into the bonding within the species, particularly the Rh-C interactions, and to this end experimental c…
Nonlinear transport in the one dimensional Hubbard model at half-filling under a finite bias voltage is investigated by the adaptive time-dependent density matrix renormalization group method. For repulsive on-site interaction, dielectric breakdown of the Mott insulating ground state to a current-carrying nonequilibri…
We report on a ternary intermetallic compound, "YMn2Zn20", comprising a pyrochlore lattice made of Mn atoms. A series of In-doped single crystals undergo no magnetic long-range order down to 0.4 K, in spite of the fact that the Mn atom carries a local magnetic moment at high temperatures, showing Curie-Weiss magnetism…
A detailed experimental and computational study of the absorption and fluorescence spectra of 5-aminouracil (5 AU) and 6-aminouracil (6 AU) in aqueous solution is reported. The lowest energy band of the steady-state absorption spectra of 5 AU is considerably red-shifted, noticeably less intense, and broader than its c…
miRNAs (microRNAs) have proven to play essential roles in diverse biological processes including early development, cell proliferation and cell death, and cell differentiation. However, there is only limited amount of information about their potential role in chondrogenesis. In the present study, we investigated the r…
PdxB catalyzes the second step in the biosynthesis of pyridoxal phosphate by oxidizing 4-phospho-d-erythronate (4PE) to 2-oxo-3-hydroxy-4-phosphobutanoate (OHPB) with concomitant reduction of NAD(+) to NADH. PdxB is a nicotino-enzyme wherein the NAD(H) cofactor remains tightly bound to PdxB. It has been a mystery how…
Nucleation is considered for nonzero rate of change of the dimensionless barrier B, which is characterized by a finite, slowly varying "nonstationary index" N∝-(dB/dt). In the standard adiabatic approximation it is assumed that after the start of nucleation an N-independent nucleation flux is established instantaneous…
We have studied the active properties of erbium-doped aluminophosphosilicate (APS) core fibres in wide ranges of erbia, alumina and phosphorus pentoxide concentrations. The absorption and luminescence spectra of the P 2 O 5 - or Al 2 O 3 -enriched erbium-doped APS fibres are shown to be similar to those of the erbium-…
Abstract The photoinduced processes occurring after pulsed laser excitation of a series of donor–bridge–acceptor molecules comprising a phenothiazine electron donor, variable‐length fluorene bridges, and a rhenium(I) electron acceptor were investigated. A dyad with a single fluorene bridge unit exhibits electron trans…