Materials Literature
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Mountain rivers diatoms from a complex of sierras that form the Galician Central Massif (Ourense province), place of communitarian importance, have been studied. For that study, eight rivers and one spring have been sampled, over one and a half years (from 2001 to 2003) and water samples were also taken to obtain some…
North Carolina State University Theses Textile Engineering, Chemistry and Science.
In recent years, hydrogels with network structure which are consisting of more than 90 % of water have been prepared. They have the capability of swelling in water without
Abstract Octahedral gold nanocrystals have been fabricated in an alcohol ionic liquid by a one-step method in the absence of any extra capping agent. The method is based on a reaction of HAuCl4·4H2O in 1-(3-hydroxylpropyl)-3-methylimidazolium tetrafluoroborate (C3OHmimBF4) by microwave heating. Upon adjusting HAuCl4·4…
Abstract Five novel fluorescent Schiff base tin(IV) complexes of the type [SnCl3(L)] were synthesized and their properties were investigated: the emission wavelengths range from bluish green to orange (λmax: 492–545 nm). DFT calculation shows that the order of the magnitudes of HOMO–LUMO gaps is consonant with that of…
Simultaneous high-Curie temperature (TC) ferromagnetism and enhanced temperature-independent paramagnetism (χTIP) is quantified in TiO2 anatase nanorods doped with nominal 0.5 at % Fe synthesized by a hydrothermal route. The nanorod dimensions are 8–35 nm in width and several hundred nanometers in length and possess a…
We report for the first time the complete set of elastic coefficients of the mechanoluminescent material SrAl2O4 stuffed tridymite determined by the first-principles plane-wave pseudopotential total energy method. We calculate other mechanical properties (i.e., bulk modulus, Young’s modulus, and Poisson’s ratio) of th…
Abstract Functionalized mesoporous silica particles having TiO2 nanoparticles are prepared by an aerosol-assisted coassembly. The obtained mesoporous silica microparticles possess a high surface area (>400 m2/g) and uniform mesopores of about 8 nm. A TEM image shows that the TiO2 nanoparticles aredistributed wi…
A novel organic–inorganic heteropolyoxometalate compound [Cu 2 (2,2′-bipy) 2 (Inic) 2 (H 2 O) 2 ][Y(Inic) 2 (H 2 O) 5 ]H 3 [V 2 W 18 O 62 ]·5.5H 2 O ( 1 ) was hydrothermally synthesized by reaction of Cu(CH 3 COO) 2 ·4H 2 O, Y(NO 3 ) 3, V 2 O 5, K 9 BW 11 O 39, 2,2′-bipyridine, and γ-picolinic acid. The molecular asym…
The structural, magnetic, and electric properties of Dy1−xSrxCoO3−δ perovskite have been investigated systematically over the range of doping, 0.65≤x≤0.90. The Rietveld refinements of x-ray powder diffraction patterns at room temperature indicate that the samples with 0.65≤x≤0.75 show a tetragonal structure with I4/mm…
Abstract Ni–CeO2 catalyst prepared by coprecipitation–nitric-acid-leaching method was highly active and selective for high-temperature water–gas shift reaction in reforming. TPR and XRD results suggested that the high activity for water–gas shift reaction was attributed to high amounts of Ni2+ ions incorporated into C…
Pseudomonas aeruginosa PA4872 was identified by sequence analysis as a structurally and functionally novel member of the PEP mutase/isocitrate lyase superfamily and therefore targeted for investigation. Substrate screens ruled out overlap with known catalytic functions of superfamily members. The crystal structure of…
Silver-iodide (AgI)-based superionic conductors are attracting widespread interest for their potential applications in electrochemical devices such as sensors and batteries. A new kind of nanocomposite with highly ordered AgI nanowires embedded in an anodic-aluminum-oxide (AAO) membrane was fabricated by low-temperatu…
In this paper, we focus on the isotropic-to-nematic phase transition in a liquid-crystal droplet. We present the results of an experiment to measure the growth of the nematic phase within an isotropic phase liquid-crystal droplet. Experimentally, we observe two primary phase transition regimes. At short time scales, o…
High Resolution Image Download MS PowerPoint Slide The local structure around Si species in mesoporous silica FSM-16 was investigated by Si K-edge XAFS. As expected from the previous studies, the local symmetry of Si species in FSM-16 is almost identical to that of amorphous silica. The Si−O bond length was longer tha…
Diazinon is an Organophosphate Insecticide (OPI) is commonly used in agriculture to protect of crops and to control pests in home gardens and farms. Many alterations observed by diazinon have been described, such as; alterations in blood factors (RBC, Hb and Hct), plasma testosterone and glucose levels. We selected 12…
, is one of the most common materialsused in the construction of commercialbuildings. Its properties make concrete anexcellent choice for structures, claddingsystems and floor slabs. On the other hand,concrete is widely used for radiation shieldingin radiotherapy facilities and nuclear reactors,and for the prevention…
Trituration and crystallization are essential techniques for purification of intermediates and drug substances in pharmaceutical process development. Traditionally, identifying the optimal solvent conditions for impurity rejection adopts an empirical approach that can be a time and material consuming process. On the b…
The lowest energy structures of bare Gen(z) clusters (n = 10, 12; z = -6, 0, +2, +4) obtained using density functional theory (DFT) at the hybrid B3LYP level often are relatively low-symmetry polyhedra not readily recognizable by the Wade-Mingos rules. However, such optimized structures may arise from higher symmetry…
Doubly activated alkaline-earth phosphors are known to present luminescent and charge-storage properties. In this work, we investigate the photoluminescence (PL) and the optically stimulated luminescence (OSL) of the SrS:Ce,Sm phosphor by means of time-resolved spectroscopy with excitation laser pulses of 2ps duration…