Materials Literature
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Zirconia was prepared by firing the coprecipitate from ZrOCl 2 and AlCl 3 mixed aqueous solution with ammonia. When fired above 600°C, the products were fine crystalline tetragonal zirconia of crystallite size <10 nm. In previous studies, the tetragonal phase had been assumed to be a (Zr 1− x 4+ Al x 3+ )O 2− x /2…
Abstract In an investigation into making more effective use of underutilized fisheries resources, collagen was prepared from Callistoctopus arakawai arm. The arm was only slightly solubilized in acetic acid but on digestion with 10% pepsin (w/v), pepsin-solubilized collagen (PSC) was successfully produced. The PSC obt…
Tryptophan synthase catalyzes the last two steps in the biosynthesis of the amino acid tryptophan. The enzyme is an alpha beta beta alpha complex in mesophilic microorganisms. The alpha-subunit (TrpA) catalyzes the cleavage of indoleglycerol phosphate to glyceraldehyde 3-phosphate and indole, which is channeled to the…
We have designed, synthesized and evaluated dibenzothiophenylacetylene homologues as new heterocyclic molecules which were expected to have high δα values and short wavelength UV absorption spectra. The dibenzothiophenyl acetylene homologues exhibited wide nematic phase ranges and had very high extrapolated δn of over…
As propriedades químicas e cristalográficas detalhadas da caulinita (Ct) e dos óxidos de ferro do solo e dos sedimentos do Grupo Barreiras são pouco conhecidas. Para estudar as características desses minerais em profundidade, coletaram-se 11 amostras (0,7; 1,4; 2,1; 2,8; 3,5; 4,2; 4,9; 5,6; 7,7; 10,5 e 14m) nos horizo…
Tryptophan synthase is a bifunctional alpha(2)beta(2) complex catalyzing the last two steps of l-tryptophan biosynthesis. The natural substrates of the alpha-subunit indole- 3-glycerolphosphate and glyceraldehyde-3-phosphate, and the substrate analogs indole-3-propanolphosphate and dl-alpha-glycerol-3-phosphate are al…
We describe concept, design, and performance of a novel spin polarimeter based on spin-dependent specular reflection of electrons from a Fe(100) surface. The Fe surface is prepared as an ultrathin film on Ag(100). By tuning the energy of the electrons to a critical point in the Fe band structure, a large spin asymmetr…
Tetragonal BaTiO 3 powders were prepared hydrothermally at 240°C, in only 12 h, using BaCl 2 ·2H 2 O and TiCl 4 , which are rather easy to manipulate. Characterization via X‐ray diffractometry, scanning electron microscopy, Brunauer–Emmett–Teller analysis, and differential scanning calorimetry confirmed that increasin…
We prepared two new linkers, S-functionalized adamantane derivatives 2 and 3, which bind as monolayers on polycrystalline gold. From these surface anchors, both L- and D-isomers of alanine can be grown as thin films of α-helical polypeptides directed from the gold surface by using the appropriate N-carboxyalanine anhy…
Pseudomonas oleovorans NRRL B-778 accumulated mixtures of poly-3-hydroxybutyrate (PHB) and medium-chain-length poly(hydroxyalkanoates) (mcl-PHAs) when grown on glucose, octanoic acid or oleic acid, whereas growth on nonanoic acid or undecanoic acid resulted in copolymers of poly-3-hydroxybutyrate-co-3-hydroxyvalerate…
We present our experimental results on the measurements of excited state dynamics in phthalocyanines ( Pc , CuPc , FePc , and ZnPc ) using degenerate four wave mixing with incoherent light (DFWM-IL). Three different timescales were observed, for all samples, in the phase conjugate signal recorded as a function of dela…
A Kirkendall-effect-mediated behaviour (migration) of fiducial markers originally situated at the contact surface of a diffusion couple can be complex in both temporal and spatial domains. A phenomenological approach based on a concept of the Kirkendall velocity construction is used to rationalize the movement of the…
Binary and ternary cation‐exchange reactions involving NH + 4 , K + , and Ca 2+ on vermiculite and hydroxy‐Al interlayered vermiculite (HIV) were investigated. In the case of vermiculite, NH 4 ‐Ca exchange was nearly indistinguishable from the nonpreference isotherm while HIV exhibited preference for NH + 4 The presen…
A method has been proposed for developing structure-property relationships of nano-structured materials. This method serves as a link between computational chemistry and solid mechanics by substituting discrete molecular structures with equivalent-continuum models. It has been shown that this substitution may be accom…
The electrochemical synthesis of tetraphenylborate (TPB) ion doped polypyrrole is reported. The electrochemical polymerization of ion exchanger doped polypyrrole is carried out in dry acetonitrile. The polypyrrole synthesized under present conditions is characterized by scanning electron microscopy and cyclic voltamme…
A neural network (NN)-based model of scalar hysteresis characteristics has been developed for modeling the behavior of magnetic materials. The virgin curve and a set of the first-order reversal branches can be stored preliminary in a system of three NNs. Different properties of magnetic materials can be simulated by a…
We present an analytical solution for Monte Carlo simulations of the microstructure of ethylene/α-olefin copolymers synthesized using single-site catalysts. The bivariate distribution and the longest ethylene sequence (LES) distribution in number and weight are derived for this system. All the results were compared wi…
Boronization of NSTX has allowed access to higher density higher confinement plasmas. A glow discharge with 4 mtorr helium and 10% deuterated trimethyl boron deposited 1.7 g of boron on the plasma facing surfaces. Ion beam analysis of witness coupons showed a B + C areal density of 10 18 cm -2 corresponding to a film…
The paper reports the influence of an ethanol emitter (Ethicap) on the microbiological condition and the shelf life extension of a bakery product. Pre-baked buns, with a water activity of 0.95, were packaged with different amounts of Ethicap and stored at room temperature. Yeasts and moulds remained largely absent fro…
Cascaded identical resonant grating reflection filters are shown to exhibit flattened spectral responses when the individual filter elements are cascaded pi out of phase. Off resonance, the net response of a cascaded arrangement is given approximately by the sum of the individual filter responses. Cascading filters pi…