Materials Literature
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Many applications of native cellulose, regenerated cellulose, and chemical cellulose derivatives, such as esters and ethers, involve contact of the material with a liquid phase that contains dissolved or dispersed matter. For most of these applications, detailed knowledge of the interactions of the cellulosic material…
The checklist of freshwater diatom species from Parana state was based on 88 studies, considering scientifi c papers and monographic works for Master´s Degree. A total of 1004 infrageneric taxa were recorded, including 775 species and 229 taxonomic varieties or forms. 265 taxa can be considered new records for Parana,…
The electronic transmission and conductance of a gapped graphene superlattice were calculated by means of the transfer-matrix method. The system that we study consists of a sequence of electron-doped graphene as wells and hole-doped graphene as barriers. We show that the transmission probability approaches unity at so…
Abstract Electroabsorption and electrophotoluminescence spectra of supramolecular porphyrin dimers in a solid film of poly(methyl methacrylate), PMMA, have been examined. The electroabsorption spectra in the Soret band region are fitted by the deconvolution of the corresponding absorption spectrum into four components…
A fiberglass-reinforced polymer blend with a new-generation flame retardant is studied with multienergy synchrotron X-ray tomography to assess the blend homogeneity. Relative to other composite materials, this sample is difficult to image due to low X-ray contrast between the fiberglass reinforcement and the polymer b…
This paper attempts to apply artificial intelligent techniques in high voltage applications and especially to estimate the critical flashover voltage (FOV) for polluted insulators, using experimental measurements carried out in an insulator test station according to the IEC norm and a mathematical model based on the c…
The effect of confinement and energy transfer on the dynamics of a molecular magnet, known as a model system to study quantum coherence, is investigated. For this purpose the well-known polyoxovanadate [V(15)As(6)O(42)(H(2)O)](6-) (V(15)) is incorporated into a protein (human serum albumin, HSA) cavity. Due to a huge…
Silicon surface is modified using electrochemical deposition methods to improve its reactivity for photoelectrochemical reduction of CO2. Starting from a solution of CuSO4, copper is deposited by potentiostatic and a pulsed deposition technique providing metal particles. These catalytic sites lower the overpotential f…
Abstract Star‐shaped poly(phenoxy propylene sulfide) [poly (PPS)] were synthesized by anionic polymerization using a trifunctional initiator ( I 1 ) derived from a trifunctional five‐membered cyclic dithiocarbonate and benzyl amine. Conditions for the anionic polymerization of PPS were optimized to obtain polymers wit…
The crystallization of polyethylene/fullerene (PE/C60) nanocomposites with different fullerene content was investigated at different temperatures by means of molecular dynamics simulation. It is found that there is a critical temperature for PE/C60 nanocomposite crystallization. The high C60 content makes the low crit…
Abstract A new structurally simple motif, where two anthracene moieties are linked by a 2‐aza‐1,3‐butadiene bridge has been synthesized and characterized. This new molecular probe senses Yb 3+ metal cations through two different channels: a colour change from yellowish to orange, which can be used for its “naked‐eye”…
Abstract Ring opening polymerization of ε‐caprolactone was realized in the presence of monomethoxy poly(ethylene glycol) with M n = 1000 and 2000, using Zn(La) 2 as catalyst. The resulting PCL‐PEG diblock copolymers with CL/EO repeat unit molar ratios from 0.2 to 3.0 were characterized by using DSC, WAXD, SEC, and 1 H…
The control of the assembly of nanostructures of dye-coded oligonucleotide−silver nanoparticle (DOSN) conjugates (silver nanoparticles cofunctionalized with thiol modified DNA and a Raman reporter molecule) in a sandwich assay format with single base discrimination in an unmodified target oligonucleotide is reported.…
Abstract Applying a metathesis approach (MCl2·xH2O+Na2SnO3·xH2O→MSn(OH)6+NaCl+xH2O), Schoenfliesite-type materials with general formula MSn(OH)6 (where M=Ca, Cu, Mg, Mn or Zn) were synthesized at room-temperature. The high lattice-energy of the by-product alkali halide NaCl drives the reaction in the forward direction…
As a kind of important extremophiles to realize the adaptation of life at high temperatures, thermophiles have attracted extensive studies. However, the pathways of thermophile proteins related to thermoadaptation remain to be addressed. Our study showed that there existed two types of protein profiles for the thermop…
Abstract A stochastic approach to describe the crystal size distribution dynamics in antisolvent based crystal growth processes is here introduced. Fluctuations in the process dynamics are taken into account by embedding a deterministic model into a Fokker‐Planck equation, which describes the evolution in time of the…
Ln(4)FeGa(12), where Ln is Y, Tb, Dy, Ho, and Er, prepared by flux growth, crystallize with the cubic Y(4)PdGa(12) structure with the Im3m space group and with a = 8.5650(4), 8.5610(4), 8.5350(3), 8.5080(3), and 8.4760(3) A, respectively. The crystal structure consists of an iron-gallium octahedra and face-sharing rar…
Abstract A combined power system with solid oxide fuel cell (SOFC) and gas turbine (GT) is modelled and analysed thermodynamically in this paper. A novel optimisation strategy including the design of optimal parameters is proposed and applied to the hybrid system. Different sources of irreversible losses are specified…
Polypyrrole films have been prepared by potentiostatic electrochemical polymerization at low temperatures. The cyclic voltammograms and the electronic transport properties of the films are investigated as a function of the polymerization potential. As the potential increases from 520 mV to 1.2 V, the oxidation peak mo…
In the present study, the duplex stainless steel (DSS) composite plate (SAF2205/16MnR) was welded by shielded metal arc welding, and the appropriate joint design and welding procedure were carried out. After welding, the mechanical behaviors and microstructure of welded joint were analyzed by using SEM and TEM. Result…