Materials Literature
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Abstract Due to pollution issue and dark color of carbon black, nonblack filler are getting more importance for reinforcing elastomer. EPDM‐kaolin composites with variable maleated EPDM concentration have been prepared by mixing on a two roll mill. Optimum cure time increases with increasing compatibilizer concentrati…
Many achiral polymers crystallize into spherulites with gigantic chirality, as is evident from spectacular images of periodic banding observed in a polarized optical microscope, arising from the twisting of the lamellae making up the spherulites. We present a new mechanism of the spontaneous chiral symmetry breaking,…
We report on several unusual properties of a graphene antidot created by a piecewise constant potential in a magnetic field. We find that the total probability of finding the electron in the barrier can be nearly one while it is almost zero outside the barrier. In addition, for each electron state of a graphene antido…
La0.67Ca0.33MnO3 thin films were epitaxially grown on miscut MgO(001) substrates by pulsed laser ablation. Electrical transport properties were studied by using an ultra high vacuum, four-probe STM system at different temperatures. Anomalous resistivity behavior and metal-insulator transition temperatures were found,…
Effects related with the attenuation and deflection suffered by an electron beam when it passes through a carbon conductive coating and an oxide film layer on the surface of bulk samples are studied by Monte Carlo simulations and energy dispersive spectroscopy with electron excitation. Analytical expressions are provi…
The crystal structures of Pb 2 Pd 3 Se 2 and superconducting Bi 2 Pd 3 Se 2 are investigated from single crystal X -ray diffraction. Thus, an enhanced view on structure trends can be given for the series Bi 2 M 3 Ch 2 and Pb 2 M 3 Ch 2 ( M = Ni, Rh, Pd, Ch = S, Se) including structure-property relations to superconduc…
Abstract Amino polysiloxanes (APSs) with different amino values and amino types were synthesized and applied to cotton fabrics. Softening and smoothening properties of the fabrics treated with APSs were investigated and evaluated by measuring wrinkle recovery angles and friction coefficients, and the morphological fea…
The surfaces of poly(urea-formaldehyde) (PUF) were modified by γ -glycidoxypropyltrimethoxy silane (KH560) in order to improve the interfacial bonding between self-healing PUF microcapsules and epoxy matrix. The modification mechanism between PUF microcapsules and KH560 was studied. X-ray photoelectron spectra (XPS) a…
Nanoporous gold (NPG) is a material of emerging interest for the immobilization of biomolecules and especially enzymes. The material provides a high surface area form of gold that is suitable for physisorption or covalent modification by self-assembled monolayers. The material can be used as a high surface area electr…
The effect of Solanum melongena L. leaf extract on the corrosion of aluminium in 0.5 M H2SO4 was investigated by using the gravimetric technique. It was shown that the presence of S. melongena L. leaf extract inhibited the corrosion of aluminium in the test solutions and that the inhibition efficiency depended on the…
The scanning helium ion microscope has been used in transmission mode to investigate both the feasibility of this approach and the utility of the signal content and the image information available. Operating at 40 keV the penetration of the ion beam, and the imaging resolution achieved, in MgO crystals was found to be…
Nine polycarboxylic acids (PAs) were employed in silica sol to offer an alternative approach in improving washing durability of the hydrophobic cellulose fabric by the sol−gel method. Polycarboxylic acids played a twofold role since they work not only as catalysts in hydrolyzing silica precursor but more importantly a…
The effect of gold nanoparticles on mouse epididymal sperm has been studied using the model system of nuclear chromatin decondensation in vitro. It is shown that the treatment of gametes, preliminary membrane-freed by sodium dodecyl sulfate, in the mediums containing gold nanoparticles (with diameter ∼2.5 nm) in conce…
Soil seasonal change is believed to be one of the major factors that contribute to high-pH stress corrosion cracking (SCC) of underground pipelines, although the specific role and mechanisms of the soil seasonal change in the SCC susceptibility are not clearly understood. This study is directed at investigating this r…
Various hardwood and softwood chemical pulps, including those with relatively high lignin content (up to ca. 10.5%), were completely dissolved without milling in lithium chloride/dimethyl sulfoxide (LiCl/DMSO) after a pretreatment with ethylenediamine (EDA). Because milling of the sample is not required, degradation o…
Abstract We present electronic transport calculations for single wall carbon nanotubes (CNTs) using two highly idealized models to describe the electrodes and their contact to the CNT. In the first model we use CNT‐electrodes and in the second one we apply the wide‐band approximation, neglecting any atomic structure w…
Structural phase transitions of GeTe are studied with the use of the ab initio pseudopotential density-functional method. Transition pathways and pressures for NaCl-to-CsCl structures are investigated considering three different paths, namely, the Watanabe, Tol\'edano, and modified Buerger pathways. Structural and ele…
The present investigation demonstrates the effectiveness of ultraviolet (UV) radiation and ethyl methanesulfonate (EMS) in strain improvement for enhanced cellulose production by Gluconacetobacter xylinus NCIM 2526. The mutants were compared with wild type for cellulose production. UV mutants GHUV3, GHUV4, and GHUV5 o…
Peptide amphiphile (PA) is a peptide-based biomaterial that can self-assemble into a nanostructured gel-like scaffold, mimicking the chemical and biological complexity of natural extracellular matrix. To evaluate the capacity of the PA scaffold to improve islet function and survival in vitro, rat islets were cultured…
Azotobacter vinelandii is a bacterium obligate aerobe able to fix nitrogen and grow under microaerophilic conditions. This microorganism has remarkable cellular machinery with the ability to biosynthesize three molecules of important biotechnological and biomedical applications: the extracellular polysaccharide algina…