Materials Literature
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Recently Ni-free Ti-based shape memory alloys have been actively studied for biomedical applications in order to replace Ti-Ni alloys which bear the possibility of Ni-hypersensitivity. In this paper, The Ti-(40-65) Ta (wt. %) alloys have been studied with regard to their microstructure, mechanical and shape memory pro…
Abstract Heterometal alkoxide clusters of lanthanide and sodium, LnNa 8 [OC(CH 3 ) 3 ] 10 (OH) [where Ln = Nd ( 1 ) or Yb ( 2 )], which were synthesized by the metathesis reaction of LnCl 3 with NaOC(CH 3 ) 3 and NaOH in a 1 : 10 : 1 molar ratio in high yields and fully characterized including X‐ray analysis for 2 , w…
Abstract In this study, hydrogels were prepared from blends of poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP). The miscibility of the polymers was confirmed with differential scanning calorimetry with the appearance of a single glass‐transition temperature. Additionally, a negative Flory–Huggins interacti…
Purpose The purpose of this paper is to describe how a discrete element model is used to predict the penetration depth and the perforation caused by a non‐deformable missile against a thin reinforced concrete slab. Design/methodology/approach Initial calibration of the model was done with a series of flat‐nose missile…
The adsorption of NO molecules on small Pd(n) (n = 1-6) clusters has been studied using first-principles density-functional theory. Three adsorption sites were considered: vertex (on-top), bridge, and hollow. Adsorption is strong, ranging from 2 to 3 eV. In all cases NO adsorbs in a bent configuration. Calculated shif…
Diffraction of plane waves on dielectric gratings with planar plasmonic inserts is studied with the emphasis put on the anomalous selectivity of diffraction orders. It is shown that some formally propagating orders can be suppressed within a wide frequency range. The effect of suppression is more general than the isol…
The charge-transport properties of the one-dimensional stacking metal phthalocyanine iodides (M(Pc)I, M = Fe, Co, Ni, Cu) and metal-free phthalocyanine iodide (H2(Pc)I) have been theoretically investigated. On the basis of the tight-binding approximation and two-state theory, both the site-energy corrected energy spli…
The temperature-dependent local structures of cuprites (M 2 O for M = Cu I, Ag I ) have been probed using variable-temperature (80−500 K) high-resolution pair distribution function (PDF) analysis of X-ray scattering data measured to very high values of momentum transfer ( Q max = 35 Å −1 ). These noble metal oxides ex…
Abstract Physical and chemical modifications of polymeric ultrafiltration membranes are necessary to improve their hydrophilic properties, strength, and other characteristics. Microcrystalline cellulose (MCC) was prepared from cellulose pulp by acid‐catalyzed hydrolysis in the presence of ultrasonic radiation, and the…
The Escherichia coli siderophore enterobactin is assembled from 2,3-dihydroxybenzoate (2,3-DHB) and l-serine by the nonribosomal peptide synthetases EntB and EntF. The processive thiol-template strategy used can be sabotaged by EntB misacylation. Through in vitro kinetic analysis, we demonstrate two potential routes t…
Abstract The thermal degradation behavior of styrene‐butadiene‐styrene triblock copolymer (SBS) and SBS/multiwalled carbon nanotubes (MWCNTs) composites prepared by solution processing and melt mixing, respectively, was investigated using nonisothermal thermogravimetric analysis (TGA). The kinetic parameters of the ac…
The third-generation bis(1-pyrazolyl)methane ligands p-C(6)H(4)[CH(2)OCH(2)CH(pz)(2)](2) (L(p), pz = pyrazolyl ring) and m-C(6)H(4)[CH(2)OCH(2)CH(pz)(2)](2) (L(m)) have been synthesized by the reaction of (pz)(2)CHCH(2)OH with NaH followed by alpha,alpha'-dibromo-p-xylene or alpha,alpha'-dibromo-m-xylene. The reaction…
Both hyaluronan (HA) and chitosan (CHI) are biocompatible polysaccharide electrolytes. The multilayers formed by these polyelectrolytes alone are known to be rather soft and strongly viscoelastic. In this work we study multilayers formed by incorporating synthetic nonsaccharide polyelectrolytes such as polyallylamine…
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTRevision of Purity Criteria for Tested CompoundsPhilip S. PortogheseCite this: J. Med. Chem. 2009, 52, 1, 1Publication Date (Web):January 2, 2009Publication History Published online2 January 2009Published inissue 8 January 2009https://pubs.acs.org/doi/10.1021/jm801525shttps://…
Cerium oxide nanoparticles with sphere-like in shape were synthesized by precipitation method, using cerium nitrate as raw material and ammonium acid carbonate as precipitation agent. Effects of reactant concentration, supersonic wave and dispersant agent on properties of the cerium oxide particles were investigated.…
We report the first synthesis of π-bonded rhodio and iridio- o -benzoquinones [Cp*M( o -benzoquinone)] (M = Rh ( 3a ); M = Ir ( 3b )) following a novel synthetic procedure. These compounds were fully characterized by spectroscopic methods; in particular the X-ray molecular structure of 3b was determined. Compounds 3a,…
Gluconate 5-dehydrogenase (Ga5DH) is an NADP(H)-dependent enzyme that catalyzes a reversible oxidoreduction reaction between D-gluconate and 5-keto-D-gluconate, thereby regulating the flux of this important carbon and energy source in bacteria. Despite the considerable amount of physiological and biochemical knowledge…
Vapor-liquid equilibrium data for systems of hyperbranched polymer (HBP) and carbon dioxide are reported for temperatures of 285-455 K and pressures up to 13 MPa. The bubble-point pressures of (CO2 + hyperbranched polyester) and of (CO2 + hyperbranched polyglycerol + CH3OH) samples with fixed compositions were measure…
Abstract A new interesting class of polyamides containing diarylidenecyclopentanone moiety III a–f was synthesized by polycondensation reaction of the new diamino arylidene monomer I with different aliphatic and aromatic diacid chlorides (including adipoyl, sebacoyl, oxaloyl, terephthaloyl, isophthaloyl, biphenyldicar…
Abstract In this study, a series of shape‐memory polyurethanes were prepared from polycarbonate diol (PCDL) with a molecular weight of 2000, trimethylol propane, and isophorone diisocyanate (IPDI). The properties of crosslinked poly(carbonate urethane) (PCU) networks with various compositions were investigated. The ch…