Materials Literature
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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…
Low temperature sintering of 0.5Ba(Zr0.2Ti0.8)O3– 0.5(Ba0.7Ca0.3)TiO3 [BZT-BCT] was studied using two different glass additive namely, strontium borate (SrB4O7) and BaO,SiO2,.B2O3. First, single phase BZT–BCT powders were prepared by conventional solid state reaction technique at 1200oC. It was observed that strontium…
En este trabajo se investigo la influencia que ejercen algunos factores cineticos y la quimica superficial de las particulas sobre la distribucion y el grado de dispersion de arcillas en sistemas heterogeneos compuestos por poliestireno (PS) y polibutadieno (PB). El estudio se llevo a cabo en dos etapas. En la primera…
Abstract The new title compounds are prepared from the elements by arc‐melting and subsequent annealing at 870 K for 720 h.
Today, it's me and the womanI replacewho walk the labyrinth lined with stonesat the base of the mountain—we are separated from each otherinside the winding circuitsas if in tragedy:it's her joy to ...
The oxidative deoximination of several aldo- and keto-oximes by tetrakis(pyridine)silver dichromate (TPSD), in dimethylsulphoxide (DMSO), exhibited a first order dependence on TPSD. A Michaelis-Menten type kinetics was observed with respect to oximes. The oxidation of ketoximes is slower than that of aldoximes. The ra…
A new coordination polymer, [Mn(3,4-pybz)2]n·3(H2O)(1), has been hydrothermally synthesized from Mn Cl2·4H2O and an unsymmetrical 3-pyridin-4-yl-benzoic acid(3,4-Hpybz), and characterized by IR, elemental analysis, thermogravimetric analysis, and singlecrystal X-ray diffraction. In complex 1, each 3,4-pybz ligand repr…
设计并合成了一种交叉共轭的(cross-conjugated)缺电子型聚合物单体二溴代噻吩[2,3-b]并噻吩-吡咯[3,4-c]并吡咯(DPPTTZ)二酮,并将其分别与噻吩(T)、硒吩(Se)和N-甲基吡咯(Py)的双锡试剂进行共聚反应,获得了一类新的供体-受体(D-A)型共轭聚合物光电材料.这类材料分子的最高占有轨道(HOMO)能级较低,因此其光电器件具有较高的开路电压(Voc),稳定性好.此外,它们在紫外-可见光区有较宽的吸收,最大吸收位于波长620 nm附近;能带隙(band gap)小,分别为1.86 eV(pDPPTTZ-T)、1.83 eV(pDPPTTZ-Se)和1.85 eV(pDPPTTZ-Py).器件初步测试…
The aims of this research project were to manufacture and characterise PDPA-based pH-sensitive functionalised polymersomes using a medium-high content screening method, suitable for CNS drug delivery. Angiopep-2 functionalised polymersome formulations have been found that are able to penetrate the blood-brain barrier…
A lattice model for binary mixture of lipids and water is introduced and investigated. The orientational degrees of freedom of the amphiphilic molecules are taken into account in the same way as in the model for oil-water-surfactant mixtures introduced earlier by Johan Høye and co-authors. The ground state of the mode…
A series of air permeance tests were performed on test panels constructed of clay brick and mortar according to ASTM E2178-11: Standard Test Method for Air Permeance of Building Materials. Four sets of brick were included in the test which represented a range of brick configurations. Typically, very low values of air…
A new synthetic methodology for the combinatorial preparation of C-terminus-modified Green and Red Fluorescent Protein chromophores is described. This method involves the modification of the previously reported [2+3] cycloaddition reaction scheme to incorporate new R2 groups in the imidate used in the final step. This…
The grinding ball mills are equipments present in mining plants, being important in the ore comminution circuits.Depending on numerous factors, such as, for example, design, manufacturing, overloads, poor maintenance and inadequate operating procedures, flaws are developed in the structural components of this equipmen…