Materials Literature
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ABSTRACT Rigid polyurethane‐polyisocyanurate (PUR‐PIR) foams modified with tris(5‐hydroxypentyl)‐2‐hydroxypropane‐1,2,3‐tricarboxylate (THHT) were synthesized. Selected foams were subjected to degradation in an aging oven for 168, 346, and 504 h, respectively. These foams have been exposed to UV radiation. FTIR analys…
Abstract NiL 2+ (L = 1,4,8,11‐tetraazacyclotetradecane) was entrapped in sol–gel matrices in the presence of graphite. The matrices thus prepared serve as electrocatalysts for the oxidation of amines. The results point out that: (1) It is easy to prepare electrocatalytic electrodes by using this approach. (2) The prop…
Abstract A major challenge to turn the potential of carbon nanotubes (CNTs) into customer applications is to reduce or eliminate their toxicity. Taking into account health and safety concerns, intensified research efforts have been conducted to improve the biocompatibility of CNTs, including the development of new sho…
An intuitively persistent enhancement of the local surface potential of BiFeO3 layers in both heterostructures of BiFeO3/SrRuO3/SrTiO3 and BiFeO3/Sr0.09Nb0.01TiO3 was observed by the Kelvin probe force microscopy technique after the illumination of 375 nm laser. This photo-induced enhanced surface potential can mainta…
For the first time, comprehensive phycological screening on El-Farafra Oasis (Western Desert, Egypt) had been implemented for unveiling and characterization of its cryptic algal diversification, with special interest on springs and drilled wells. Overall during summer 2011 and winter 2012, 82 different algal taxa have…
This study investigated the glueless preparation of biomass board using rape straw on a laboratory scale. The board-making process was broken down into four steps: soaking, refining, shape recovery, and hotpressing. To observe the effect of pressure during the hot-press stage on the strength of the bio-board, five pan…
The molecular mechanism of CeONP in protecting against neuronal cytotoxicity from amyloid peptides and copper ions was investigated systematically by photoluminescence of [Ru(phen)2dppz](2+), morphology of TEM, mass spectroscopy, cell viability assay, ROS fluorescence assay, and EPR. The results revealed that CeONPs r…
β and α relaxation processes are dynamical scaling regimes of glassy systems occurring on two separate time scales which both diverge as the glass state is approached. We study here the crossover scaling from β to α relaxation in the cooperative facilitation scenario (CFS) and show that it is quantitatively described,…
We report on wide-angle X-ray scattering measurements along the smectic-A to chiral ferroelectric smectic-C* phase transition of the liquid crystal SCE9 and its mixture with maghemite magnetic nanoparticles of typical dimension 20 nm. The temperature profiles of the tilt angle are fitted by an extended mean-field mode…
Molecular magnetism draws from the fundamental ideas of structural chemistry and combines them with experimental physics resulting in one of the highest profile current topics, namely molecular materials that exhibit multifunctionality. Recent advances in the design of new generations of multifunctional molecular magn…
In asymmetric poly(l-lactide)/poly(d-lactide) (PLLA/PDLA) blends, the pre-existing stereocomplex crystals can impose confinement effects on homocrystallization of uncomplexed PLLA among them. However, confinement effects are very weak in the blend films because of relatively large PLLA domains distributed in the skele…
Described in this work is a novel method for photochemically manipulating peptides and proteins via the installation of cysteine-selective photoactive tags. Thiomaleimides, generated simply by the addition of bromomaleimides to reduced disulfide bonds, undergo [2 + 2] photocycloadditions to reconnect the crosslink bet…
Impingement of high fluxes of helium ions upon metals at elevated temperatures has given rise to the growth of nanostructured layers on the surface of several metals, such as tungsten and molybdenum. These nanostructured layers grow from the bulk material and have greatly increased surface area over that of a not nano…
culturing of human mesenchymal stem cells with SMPs coated with dexamethasone-loaded nanogels. This article offers a new strategy to independently tune multiple functions on a single polymeric device, and has broad application toward implantable, minimally invasive medical devices such as vascular stents and ocular sh…
Alkylacetamide-based model peptides display an intense Debye-type dielectric relaxation. In order to explore the extent to which this feature has to be regarded analogous to that in other supramolecular liquids, notably the monohydroxy alcohols, we applied broadband dielectric, time-dependent solvation, and near-infra…
New homologous series of coumarin Schiff base derived from 6-aminocoumarin and their zinc(II) complexes have been synthesised. The spectroscopic characterisations, photophysical properties, phase transition temperature, characterisation of phase and gelation behaviour are reported. The ligand is non-mesogenic at lower…
The effect of concentrations of organic components (ethylene glycol and citric acid) on the intensity of redox reaction and the properties of the product in the glycol citrate synthesis of ultrafine lanthanum zirconate La 2 Zr 2 O 7 has been studied. The onset and offset temperatures of the fluorite–pyrochlore phase t…
A library of microorganisms originating from various marine environments in French Polynesia was screened for polyhydroxyalkanoate producing bacteria. No significant connection was found between the geo-ecological source of bacteria and their ability to produce polyhydroxyalkanoate. A bacterial strain designated as En…
In this study, calcium carbonate (CaCO 3 ) whiskers were grafted with poly(methyl methacrylate) (PMMA) by in situ emulsion polymerization using γ‐methacryloxy propyl trimethoxyl silane (γ‐MPS) as a coupling agent, and the properties of resultant whisker were determined using Fourier transform infrared (FTIR) spectrosc…
A novel method for synthesizing fluorescent, cyan emitting Cu nanoclusters (CuNCs) has been successfully established in aqueous solution. Moreover, the as-synthesized CuNCs were employed for assaying TC accompanied by a satisfactory detection limit and linear range. Additionally, this type of CuNC was further applied…