Materials Literature
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A series of water-soluble tri-anionic and -cationic substituted phthalocyanines has been synthesized via iodinated boron subphthalocyanines. The latter were opened with differently substituted diiminoisoindolines via the Kobayashi ring expansion reaction followed by metal insertion to exclusively yield the asymmetrica…
Abstract A biodegradable, immiscible poly(butylenes adipate‐ co ‐butylenes terephthalate) [P(BA‐ co ‐BT)]/poly(ethylene oxide) (PEO) polymer blend film with compositional gradient in the film‐thickness direction has been successfully prepared in the presence of a low‐molecular‐weight compound 4,4′‐thiodiphenal (TDP),…
Some properties of the remarkable Ti3SiC2 based ceramic synthesised by hot pressing of elemental Ti, Si, and C powders have been investigated. Its flexural strength by using three point bending tests and fracture toughness by using single edge notched beam tests were measured at room temperature to be in the range 310…
Research Article| September 01, 2005 Valve development in the diatom family Asterolampraceae H. L Smith 1872 Mary Ann Tiffany; Mary Ann Tiffany 1Center for Inland Waters and Department of Biology, San Diego State University, San Diego CA 92182-4614, USA Search for other works by this author on: GSW Google Scholar Davi…
A series of cyclosiloxane‐based cholesteric liquid crystalline (LC) polymers were synthesized from a cholesteric LC monomer cholest‐5‐en‐3‐yl(3β) 4‐(2‐propenyloxy)benzoate and a nematic LC monomer butyl 4‐[4‐(2‐propenyloxy)benzoxy]benzoate. All the polymers exhibit thermotropic LC properties and show cholesteric phase…
Electron-paramagnetic-resonance (EPR) and photoluminescence (PL) studies on magnesium gallate (MgGa2O4) phosphor activated with divalent manganese have been carried out. The EPR spectrum exhibits a six-line hyperfine structure centered at g=1.995, which is a characteristic of a Mn2+ ion with a nuclear spin I=5∕2. The…
Four organic inhibitors namely 2-amino-1,3,4-thiadiazole (AT), 5-methyl-2-amino-l,3,4-thiadiazole (MAT), 5-ethyl-2-amino-1,3,4-thiadiazole (EAT) and 5-propyl-2-amino-1,3,4-thiadiazole (PAT) were synthesized and their influence on the inhibition of corrosion of mild steel (MS) in hydrochloric acid was investigated by w…
Three-dimensional (3D) microscopy is a new and rapidly expanding area. A DualBeam system, with both a focused ion beam (FIB) column and an electron column, is a powerful instrument for imaging and sectioning microstructures to generate a full 3D sample reconstruction. When an electron backscatter diffraction (EBSD) sy…
Structural and dielectric properties of epitaxial SrTiO3 (STO) thin films on LaAlO3 substrates fabricated by a two-step growth technique using pulsed laser deposition were investigated by in situ and ex situ observations in terms of strain relaxation from the lattice mismatch between the film and the substrate. In a f…
Abstract The use of polymeric materials for the administration of pharmaceuticals, and as biomedical devices has increased dramatically. This review focuses on synthetic biodegradable polymers of current interest for medical use, based on ester and anhydride bonds. Special attention is given to factors affecting biode…
O/W emulsions with liquid crystals are complex systems for the delivery of actives into the skin surface since they modulate the release rate in the structure, and they increase the stability and solubility of slightly soluble substances in oil or aqueous phase and support moisturing by decreasing the transepidermal w…
The dependences of electrical properties on (111) and (100) orientations were investigated for (Ba 0.5 Sr 0.5 )TiO 3 films with in-plane random (one-axis-oriented films) and aligned orientations (epitaxial films) prepared by RF magnetron sputtering. Epitaxial films with (100) and (111) orientations were grown on (100)…
Formate dehydrogenase (FDG) from methylotrophic bacteria Pseudomonas sp. 101 catalyzes the reaction of oxidation of the formate ion to carbon dioxide, which is accompanied by the reduction of nicotinamid adenine dinucleotide (NAD + ). The structures of the apo and holo (enzyme-NAD-azide triple complex) forms of the en…
To create a functionalizable and photopatternable biodegradable polyester, 2-hydroylethyl methacrylate (HEMA) grafted poly(ε-caprolactone- co -RS-β-malic acid) (PCLMAc) was synthesized. The ring-opening random copolymerization of ε-caprolactone (CL) and RS-β-benzyl malolactonate (MA) using stannous octoate catalyst wa…
Precise X-ray diffraction measurements have revealed that phonon (conventional) strain is introduced at the phase transition from an icosahedral quasicrystal to its orthorhombic crystal approximant in a Mg–Ga–Al–Zn alloy. From the magnitude of the measured phonon strain, the phonon–phason coupling constant has been ev…
Abstract Kaolinite deposits, hosted by rhyolitic tuffs, are found in the SE of the ‘Los Menucos’ area (Province of Rio Negro, Argentina). The most representative examples are from the Blanquita and Equivocada mines. To discover the origin of these deposits, a mineralogical, geochemical (major and trace element) and st…
A combined wide angle X‐ray diffraction (WAXD)/small‐angle X‐ray scattering (SAXS)/scanning electron microscopy (SEM)/density study of structure and morphology was carried out for a large series of pyromellitic dianhydride‐oxydianiline (PMDA‐ODA) polyimide (PI) samples processed using different powder metallurgy techn…
In previous papers [Wang, Q.; Li, X.; Wang, L.; Cheng, Y.; Xie, G. Ind. Eng. Chem. Res . 2005, 44 (2), 261−266; 2005, 44 (13), 4518−4522], a lumped kinetic scheme and a fractional kinetic model for the liquid-phase oxidation of p -xylene catalyzed by Co−Mn−Br was proposed and tested and the effect of water on the oxid…
Highly concentrated pastes of gold nanoparticles were successfully produced by using a special type of protective polymer and a mild reductant. The solid part of these pastes comprises up to 85wt% of gold nanoparticles, 10≈30 nm in diameter and a residual protective polymer. This component can be diluted at arbitrary…
We study experimentally the dynamics of the spontaneous rise of a meniscus made of polydimethylsiloxane of various viscosities on the outside of a micrometric fiber made of monofilament in polyethyleneterephthalate. Optical methods are used to measure simultaneously the height of the liquid interface and the associate…