Materials Literature
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Abstract We provide an overview on diffusion in frictionless two‐dimensional Yukawa liquids as a model for dusty plasmas. Results are obtained for the combined influence of temperature and screening length on the character of diffusion, i.e., on the value of the diffusion exponent at long times (© 2009 WILEY‐VCH Verla…
Abstract Because of low cost, easily productivity and high thermal conductivity, aluminum (Al) moulds are preferred in the production of the polyurethane (PUR) parts. In this study, adhesion behavior and surface properties of coated materials between mould used in the production of automotive seat and PUR materials we…
Since nanomembranes are a novel concept which extends the range of MEMS & NEMS building blocks and practically introduces a new one, this means that whole branches of science and technology can be re-read and re-created through it, which may create an enormous number of novel applications. Nanomembranes need to be inc…
Abstract Fluorocarbon polymers are used to enhance thermal stability and electrostatic protection of composite propellant compositions. A precipitation technique has been developed to coat ammonium perchlorate (AP) using a copolymer of hexafluoropropylene and vinylidene fluoride (HFP‐VF) with the help of solvent‐count…
We experimentally investigated the influence of contact contour on breakdown characteristics in vacuum under uniform field. Four vacuum interrupters were used and their contact contours were designed to obtain an effective area (Seff) from 211 mm2to 550 mm2. The contact parameters were contact diameter 42.8 mm, contac…
O levantamento das espécies pertencentes aos gêneros de grandes parmélias do litoral centro-sul do Estado de São Paulo revelou a ocorrência de sete espécies de Parmotrema (talos foliosos de lobos arredondados em geral com mais de 0,5 cm larg. com margens inferiores não rizinadas) contendo como constituintes químicos m…
The rare earth-rich magnesium compounds RE 23 Ru 7 Mg 4 (RE = La, Ce, Pr, Nd) were synthesized from the elements in sealed tantalum ampoules in an induction furnace. They crystallize with the hexagonal non-centrosymmetric Pr 23 Ir 7 Mg 4 -type structure, space group P6 3 mc. The structures of La 23 Ru 6.88(1) Mg 4 (a…
Spectral characteristics including photoluminescence (PL) spectra and its excitation spectra for different AlN materials (AlN ceramics, macro size powder and nanostructured forms such as nanopowder, nanorods and nanotips) were investigated at room temperature. Besides the well known UV-blue (around 400 nm) and red (60…
This paper presents a novel framework for supporting the development of well-informed research policies and plans. The proposed methodology is based on the use of bibliometrics; i.e., analysis is conducted using information regarding trends and patterns of publication. While using bibliometric techniques in this way i…
AIM: Microbial biofilm matrix contains polysaccharides and proteins and can require extracellular nucleic acids for initial formation. Experiments were designed to identify infectious pathogens in human aneurysms and to characterize biofilm formed by calcified human arterial-derived nanoparticles. MATERIALS & METHOD:…
This paper presents the coupled analysis method to calculate the temperature rise in a gas insulated busbar (GIB). Harmonic eddy current analysis is carried out and the power losses are calculated in the conductor and enclosure tank. Two methods are presented to analyze the temperature distribution in the conductor an…
Transthyretin (TTR) is a tetrameric protein associated with amyloidosis caused by tetramer dissociation and monomer misfolding. The structure of two TTR variants (E54G and E54K) with Glu54 point mutation that cause clinically aggressive amyloidosis remains unclear, although amyloidogenicity of artificial triple mutati…
The lanthanide complex aquatrichloridobis(1,10-phenanthroline)cerium(III) [Ce(phen)2(H2O)Cl3] (KP776) was fully characterized by elemental analysis, IR-, and 1H- and 13C-NMR spectroscopy, as well as TG/DTA measurements, and its behavior in H2O, important for the application as a chemotherapeutic, was studied. In addit…
Based on the understanding of kinetic views of GeO desorption from GeO2/Ge stacks, thermodynamic control of the qualities of both GeO2films and GeO2/Ge interfaces was demonstrated. It was proposed to characterize the effects of GeO desorption on GeO2by the optical absorption. In addition, MIS band alignment was also d…
Abstract Graft copolymers of different grafting levels were synthesised by the free radical initiated reaction of cassava starch with acrylamide in presence of ceric ammonium nitrate. The viscosity properties of the native granular starch and the grafted starches were determined using a Rapid visco analyzer (RVA) and…
Abstract Since the work of Armand, polymer electrolytes have received great attention and lots of publication can be found in the literature. Each publication has its particular orientation and tries to emphasize only limited points to prove their system as the better one. But to really get some good fruitful material…
On-chip, planar integration of Er-doped Silicon-rich silicon nitride microdisks with SU-8 waveguide and polymer cladding is achieved. The lack of high temperature or etching processes allows back-end integration without any optical damage to the microcavity resonator. The maximum measured Q-factor at 1475.5 nm was 13,…
An advanced reprocessing system for spent FBR fuels based on two precipitation processes has been proposed. In the first process, only U(VI) species is precipitated using a pyrrolidone derivative (NRP) with lower hydrophobicity and donicity, which should yield a lower precipitation ability. In the second process, resi…
Abstract A new iridoid alkaloid containing a spirolactone unit, plumericidine (1), was isolated from the flowers of Plumeria rubra L. cv. Acutifolia. Its structure was elucidated by spectroscopic evidence and confirmed by X‐ray diffraction crystallography. Its anticancer and antiviral activities were evaluated, but fo…
This report shows the structural analysis study of the 30-50 nm Ni/Ni oxide nanoparticles obtained by displacement of a nickel-organometallic complex.So using techniques as electron diffraction (ED), and X-ray diffraction it was shown the presence of Ni 2 O 3 , NiO, NiO 2 , and nickel phases on it.