Materials Literature
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Este trabalho teve como objetivo o estudo da resistência à compressão e flexão de painéis de cimento-madeira utilizando farinha de madeira de Pinus spp. com granulometria controlada proveniente de reaproveitamento do rejeito de indústrias madeireiras. O material, na forma de pequenas partículas (pó), com dimensões men…
Abstract The widespread application of collagen warrants studies on the effects of ultraviolet (UV) radiation on stabilized collagen. The negative impact of UV radiation is well known. Because collagen is used as a biomaterial in various biomedical applications, knowing the effects of UV irradiation on stabilized coll…
The solubilities of irbesartan (form A) in ethanol, acetone, chloroform, dioxane, and tetrahydrofuran between 278 K and 323 K are measured by a synthetic method. A laser technique is used to determine the disappearance of undissolved solute particles. Results are correlated by a semiempirical equation, the calculated…
Two pure hydrated sodium borates, α-Na 2 B 5 O 8 (OH)·2H 2 O and β-Na 2 B 5 O 8 (OH)·2H 2 O, have been synthesized under mild hydrothermal conditions and characterized by X-ray diffraction, infrared spectral, and thermogravimetric analysis and chemical analysis. The molar enthalpies of solution of α-Na 2 B 5 O 8 (OH)·…
Abstract The influence of shear flow on the crystallization of polyamide 6/MMT nanocomposites prepared by melt intercalation process was investigated in detail by differential scanning calorimetry. The melted nanocomposites were controlled sheared in the steady and oscillatory shear flow, using a rotational rheometer,…
The effects of adsorption on the graphite(0001) surface on the nonplanar dis-tortions of nickel(II)octaethylporphyrin were studied by molecular mechanics (MM) ap-proach. Using the Consistent Force Field (CFF) program with previously developed pa-rameters for metalloporphyrins and supplemented to treat intermolecular i…
We present the atomically resolved room temperature scanning-tunneling microscopy study of bias dependent images of charge density waves (CDWs) in $1T\text{\ensuremath{-}}\mathrm{Ta}{\mathrm{Se}}_{2}$. With the help of angle-resolved photoemission of the CDW-split $\mathrm{Ta}\phantom{\rule{0.2em}{0ex}}{d}_{{z}^{2}}$…
Abstract A nanotube diode fabricated from a single C/CN x multiwalled nanotube exhibits a large photocurrent and a large photovoltage under illumination. The current–voltage ( I–V ) characteristics of the diode indicate a clear rectification effect. By comparing the I–V characteristics of C, CN x , and C/CN x nanotube…
Abstract Synthesis and characterization of a series of new emissive flexible copolymers composed of two kinds of special side‐chain functional groups is demonstrated. One of the side‐chain groups provides emissive properties, while the other serves as the ligand unit. The copolymers are used to prepare a new kind of C…
The complex relationship between the mechanical properties of individual particles and the global response of a granular assembly for many geotechnical engineering applications is well acknowledged. When studying the deformation behavior of sands, little experimental research exists in the past literature that reports…
Abstract The rheological investigation of concentrated solutions of aliphatic hyperbranched polyesters (AHBP) in N ‐methyl‐2‐pyrrolidinon (NMP) is presented. Two series of hydroxy‐functional AHBP were synthesized using pseudo‐one‐step and one‐step procedure. Three commercial (Boltorn®) AHBP were also investigated. In…
Abstract Doping of diamond using multi‐component, multi‐species structures has been modelled using density functional methods. We find that few combinations of impurities yield donor levels shallower than phosphorus. Complexes involving impurities from the second or lower rows of the periodic table are unbound, and th…
We present an interpretation that differs from an accepted explanation for resonance excitation of surface plasmons (SPs) on a metal using an attenuated total reflection (ATR) method. The metal ATR phenomenon is well expressed in terms of wave optics and accompanies an enhanced evanescent field. The ATR curves and the…
Abstract Hydrogen in a variety of forms (molecular hydrogen, atomic hydrogen, hydrocarbon radicals) is involved in diamond formation. The present work studies the incorporation of hydrogen and its bonding configuration in diamond films composed of diamond grains of varying size which were deposited by three different…
A new supramolecular system, liquid-crystalline polyrotaxane (LCPR), has been recently prepared by introduction of 4-cyano-4'- n -pentylbiphenyl (5CB) groups to the cyclic molecules of a polyrotaxane (PR) consisting of polyethylene glycol (PEG) and α-cyclodextrin (α-CD). Here we measured and compared the dielectric re…
High-resolution 2p photoionization and subsequent Auger decay of atomic Al have been investigated both experimentally and theoretically. Fine-structure-resolved experimental main and satellite photoelectron spectra were reproduced using extensive relativistic multiconfiguration Dirac–Fock calculations. Emphasis was pl…
Abstract The co‐assembly between a polyisoprene‐ block ‐poly(dimethylaminoethyl methacrylate) block copolymer and poly(ureamethylvinyl)silazane is investigated. The hybrid morphology can be controlled by systematically increasing the inorganic‐to‐organic ratio or by changing the molecular weight of the block copolymer…
Wide-angle X-ray scattering, molecular dynamics (MD) simulations, and integral equation theory are used to study the structure of poly(diethylsiloxane) (PDES), poly(ethylmethylsiloxane) (PEMS), and poly(dimethylsiloxane) (PDMS) melts. The structure functions of PDES, PEMS, and PDMS are similar, but systematic trends i…
Abstract We synthesized a series of polystyrene derivatives containing coumarin side groups using polymer analogous reactions. The liquid‐crystal (LC) alignment director for these polymer films was found to be perpendicular to the rubbing direction. The contrast ratio and anchoring‐energy values of these polystyrene d…
We explore the origin of ferromagnetism in $\mathrm{Cu}{\mathrm{Cr}}_{2}{\mathrm{S}}_{4}$ and $\mathrm{Cu}{\mathrm{Cr}}_{2}{\mathrm{Se}}_{4}$ by analyzing the computed, ab initio electronic structure. Based on our analysis, we establish the kinetic-energy driven mechanism as operative in the case of double perovskites…