Materials Literature
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Abstract The title compounds are prepared by arc melting of stoichiometric amounts of the elements followed by annealing (evacuated quartz tubes, 770 K, 720 h).
Abstract The new uranium borates K10 [(UO2)16(B2O5)2 (BO3)6O8]·7H2O (I) and K13 [(UO2)19(UO4) (B2O5)2 (BO3)6(OH)2O5] ·H2O (II) are isolated in 50% and 25% yield, resp., from reactions of UO3, KBO2, B2O3, and KOH in supercritical H2O (sealed Ag ampoules in autoclave, 600 °C, 4 d, ≈200 MPa).
Abstract The nitrilase mediated enantioselective hydrolysis is combined with an in situ racemization.
Abstract Nanosized MgS is synthesized by ball‐milling of MgH2 and sulfur.
Abstract isolation and structure determination of two novel noroleanane saponins, tubeimoside A (I) and regioisomeric tubeisomide B, and a new dammarane triterpene saponin, tubeimoside C (II), together with two known compounds
Na área de moagem secundária, ou remoagem, a preocupação com a eficiência energética se mostra de extrema importância. Em geral, os consumos específicos desta etapa são superiores aos da etapa primária. Além disso, tem se observado uma tendência de afinamento das granulometrias de moagem nos novos projetos de minerais…
Density functional theory calculations at the B3LYP/6-31G* level was performed to investigate the adsorption of formaldehyde (HCHO) on the pristine (6,0) magnesium oxide nanotube (MgONT) in terms of energetic, geometric, and electronic properties. It was found that HCHO molecule can be adsorbed on the nanotube surface…
Abstract The title compounds are prepared by arc melting of the elements followed by annealing at 800 °C (7 d).
Thermal transformations of talc-carbonate rocks consisting of talc, chlorite, mica/illite, quartz, feldspar and calcite were investigated in the range of 900°-1100°C by X-ray diffraction, thermal analyses, scanning electron microscopy and energy dispersive spectroscopy. Microstructural changes of heated decarbonated s…
Abstract Nano‐sized NASICON type LiTi2(PO4)3 particles are prepared by a Pechini type polymerizable complex method and subsequently coated with carbon.
Bilayer Graphene Bilayer graphene has two layers of hexagonally arranged carbon atoms stacked on top of each other in a staggered configuration. This spatial arrangement results in degenerate electronic states: distinct states that have the same energy. Interaction between electrons can cause the states to separate in…
Abstract The electronic structure of the V‐based title Heusler alloy is investigated by first‐principles spin‐polarized DFT calculations.
Separation Membranes Membranes for gas separation require a combination of high surface area and selective transport pathways. Brown et al. present a potentially scalable route for making high-quality gas separation membranes in a high-surface-area configuration. Using two different solvents flowing in opposite direct…
A etapa de polimento de rochas ornamentais ocorre em politrizes, as quais podem ser semi-automáticas ou automáticas. Em ambas as máquinas, a velocidade de rotação do satélite é invariável, e, por consequência, a velocidade de corte, que é a distância percorrida por um rebolo abrasivo em função do tempo, permanece cons…
Back in 1962, at the beginning of the electronics revolution, G.K. Teal, Assistant VP of Research and Engineering at Texas Instruments, predicted that modern electronics would be based fundamentall...
Abstract Pb(II) oxide hydroxide nitrates are prepared under subcritical hydrothermal conditions by adjusting the pH values of the Pb(NO3)2—NaOH reaction system.
A new complex, {[Mn3(oba)2(IP)2(CH3COO)2]·H2O}n (1) (H2oba = 4,4′-oxybis(benzoic acid), IP = 1-H-imidazo[4,5-f][1,10]-phenanthroline), has been synthesized and structurally characterized by single-crystal diffraction analysis. The structural determination revealed that 1 has a 2-D grid motif, which can be further link…
Two color white organic light-emitting diode (WOLED) that uses a co-host system in a solution process method was achieved. The device configuration was ITO/PEDOT:PSS (40 nm)/emitting layer (50 nm) / BCP (10nm) / Alq3 (20 nm) / LiF (1 nm) / Al. The emitting layer consists of two co-hosts of TATa and NPB and dopants of…
On peut utiliser une mine de crayon comme variateur de lumiere pour une lampe a incandescence.
Most of the conventional organic-inorganic composite materials developed for bone tissue engineering do not possess intimate interactions between their constituents. As a consequence, they generally degrade in a non-homogeneous manner and lose easily their integrity under mechanical load. On the other hand, their bioa…