Materials Literature
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Symmetrical four‐chained (tetracatenar) and six‐chained (hexacatenar) bi‐1,3,4‐oxadiazole ester derivatives, namely 5,5′‐bis[phenyl(3,4‐dialkoxybenzoate)]‐2,2′‐bi‐1,3,4‐oxadiazole (Cn, n = 6, 10, 12, 14, 16) and 5,5′‐bis[phenyl(3,4,5‐trialkoxybenzoate)]‐2,2′‐bi‐1,3,4‐oxadiazole (Dn, n = 7, 10, 14, 16) were synthesised…
Shape memory alloy (SMA) actuators have found a wide range of applications due to their unique properties such as high force, long stroke, small size, light weight, and silent operation, etc. However, their strong nonlinear properties make them a challenge to achieve accurate actuations. A simple control strategy is p…
Atmospheric corrosion rate of Al, Zn and mild steel (MS) as well as salinity and sulphation rate have been determined under outdoor exposure at Tithal (Dist. Valsad) situated in South Gujarat, India. MS samples exposed vertically suffer less corrosion than those exposed at an angle of 45°. Monthly corrosion rate was i…
Structure and configuration of boundary dislocations on various low angle tilt grain boundaries in alumina were considered based on the ideas that the boundary is composed of regularly arrayed edge dislocations and that the dislocations could dissociate into partial dislocations with maintaining the hcp-like oxygen su…
The diversity and fertility of 15 soils in the Doi Inthanon area of Chiang Mai province was studied using standard methods for field investigation and laboratory analysis, to characterize differences in their morphology, their physical and chemical properties and to assess their fertility levels. The soils occupied ar…
Problem statement: Nano-scale porous ZnO with high surface area have been studied to enhance physicochemical and electrochemical properties of certain optoelectronic devices applications. Approach: ZnO porous structure consists of flake-shape particles was synthesized through pyrolitic reaction of hydrozincite as Chem…
The CaCO3/biopolymer composite materials have been prepared by a two-step synthesis. The biopolymer was synthesized from chitosan and acrylic acid in supercritical carbon dioxide, then a large scale of novel flowerlike structured calcite CaCO3 on the biopolymer has been synthesized for the first time by the following…
Ultrathin carbon films with a monolayer of uniform mesopores were synthesized on a silicon substrate by contacting triblock copolymer films with benzyl alcohol vapor followed by carbonization.
We report on a tetranuclear Mn(ii) complex possessing a F-bridged molecular square topology directed by 1,10-phenanthroline ligands.
By adding a small amount of HMPA approximately 2.5 equivalent or ca. 8.1 wt% H2 can be released from the LiAlH4–LiNH2 mixture at ambient temperature, which is ∼370 °C lower than the corresponding solid-state dehydrogenation. NMR characterizations reveal the formation of intermediates, such as [AlH] and [AlN] species,…
We prepared an iron(II) spin crossover complex with a new ligand, [1,2,5]thiadiazolo[3,4-f][1,10]phenanthroline, which is a 1,10-phenanthroline analogue annulated with a thiadiazole moiety. X-Ray crystal analysis indicated a 3D network structure formed by short S⋯S contacts, and magnetic measurements revealed a broad…
For successful mesh hernia treatment with medical meshes, it is important to induce angiogenesis and fibroplasia around the site of the mesh implanted. The objective of this study is to combine a mesh with a gelatin hydrogel for basic fibroblast growth factor (bFGF) release and evaluate the angiogenic activity in vivo…
Ti(70)Zr(10)Co(20) containing an icosahedral quasicrystalline phase has been fabricated, and presents high activity and selectivity in catalyzing the oxidation of cyclohexane with oxygen under solvent-free conditions.
Acetate-induced demetalation of a {gamma-SiW(10)Fe(2)}-based dimer affords an acetato/hydroxo-bridged triiron cluster stabilized by two isomerically distinct Keggin units.
Matrix isolation IR spectroscopy has been used to study the vacuum pyrolysis of 1,1,3,3-tetramethyldisiloxane (L1), 1,1,3,3,5,5-hexamethyltrisiloxane (L2) and 3H,5H-octamethyltetrasiloxane (L3) at ca. 1000 K in a flow reactor at low pressures. The hydrocarbons CH3, CH4, C2H2, C2H4, and C2H6 were observed as prominent…
This work analyses the nature of temporal patterning of the anodic potential induced by chlorides during polarization of iron under current-controlled conditions in acid solutions. It is shown that potential oscillations emerged as a result of the local chloride attack of a thin oxide layer, which covers the iron surf…
Mixed-valent manganese phosphonate clusters [Mn(II)(8)Mn(III)(2)O(2)(O(3)PC(10)H(7))(4)(C(6)H(5)CO(2))(10)(py)(4)(H(2)O)(2)] (1) and [Mn(II)(4)Mn(III)(9)O(4)(OH)(2)(O(3)PC(10)H(7))(10)(C(6)H(5)CO(2))(5)(py)(8)(H(2)O)(6)] (2) are reported. Compound 1 is the first example of manganese phosphonate clusters prepared throu…
Calotropis procera produces copious amounts of latex, which has been shown to possess several pharmacological properities. Its local application produces intense inflammatory response. In the 10 cases of Calotropis procera -induced keratitis reported here, the clinical picture showed corneal edema with striate keratop…
Chelate evaporation method for rare earth and aluminum precursor delivery was used for “in-situ” MCVD fabrication of large core rare earth-doped optical fiber preforms. Vaporization conditions and device design are discussed. Preform results are analyzed.
OBJETIVOS: O presente estudo teve como objetivo cultivar condrócitos retirados da articulação do joelho de coelhos encapsulados em hidrogel de alginato (HA) e caracterizar a produção de matriz extracelular (ECM). MÉTODOS: A cartilagem articular foi removida do joelho de coelhos, com três a seis meses, fragmentada em p…