Materials Literature
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Formulae of magnetic field enhancement at a two-dimensional semi-elliptical bump and a two-dimensional pit with chamfered edges are derived by using the method of conformal mapping. The latter can be regarded as an approximated model of the two-dimensional pit with round edges.
Abstract Two new asymmetrical 3-( p -R-phenyl)-4-amino-5-(2-pyridyl)-1,2,4-triazoles ( 3a , R = CH 3 and 3b , R = OCH 3 ) were synthesized with a yield of 58% and 69%, respectively. The compounds 3a and 3b were characterized with FT-IR, 1 H NMR, ESI-MS spectra, and elemental analysis. Additionally, their molecular and…
The Ge concentration play an importion role in SiGe channel Fin-FET device. A fast, more convenient, and nondestructive analysis method, three-dimensional spectroscopic ellipsometry-optical critical dimension metrology (3D SE-OCD), is used to extract Ge concentrations of SiGe channel FinFETs. The refractive index (n)…
The pressurized heavy water reactors make use of heavy water in moderator and in primary heat transport system. The cationic fission products produced during the reactor operation such as Cesium, Strontium, Cobalt, Palladium, Ruthenium and anions Iodide, Iodate, Ruthenate etc. contaminate the heavy water. Columns cont…
The three-dimensional Zn(II) coordination polymer poly[[bis(μ2-benzene-1,4-dicarboxylato){μ4-N(1),N(3),N(5)-tris[(pyridin-3-yl)methyl]benzene-1,3,5-tricarboxamide}dizinc(II)] monohydrate], {[Zn2(C8H4O4)2(C27H24N6O3)]·H2O}n, is characterized by a rare (4,4,4)-connected (4.6(2).7(2).8)(4.6(2).7(3))(4(2).6(2).7(2)) topol…
Abstract Review: 131 refs.
Abstract Ln(IO3)3 (Ln = Ce, Nd, Eu, Gd, Er, Yb) polycrystals are hydrothermally prepared using aqueous solutions of Ln(NO3)3 or Ln2O3 and HI as precursors (autoclave, 230 °C, 24 h).
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…