Materials Literature
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A first generation phosphorus-containing dendrimer with twelve terminal benzyl dithiobenzoate functions was designed and subsequently used as a multifunctional agent to derive hybrid star copolymers consisting of a dendritic core surrounded by twelve polystyrene branches by reversible addition-fragmentation chain tran…
In contrast to octaethylporphyrin, which forms a very labile bis-BF(2) complex, treatment of the hexa- and octapyrrolic expanded porphyrins amethyrin and [32]octaphyrin with BF(3).Et(2) under standard reaction and work-up conditions gives rise to stable, non-labile mono- and bis-BF(2) complexes; these were readily cha…
We investigate the transport limited currents (ILim) observed at electrodes placed ‘face-on’ to a sonic transducer such that a significant convective flux arising from acoustic streaming is observed. Experiments conducted at 25 kHz with turbulent solution flow concerned with the oxidations of iodide or ferrocyanide an…
Aging behavior of an ultrafine grained Al–Cu alloy was studied. Al–2 wt%Cu alloy sheets were solution-treated at 550 °C for 1.8 ks and then severely deformed up to an equivalent strain of 4.8 by the accumulative roll bonding (ARB) process at ambient temperature. The ARB processed material showed the ultrafine lamellar…
We used two-photon excitation fluorescence correlation spectroscopy (FCS) and neutron reflectometry to study in situ the effect of salt concentration on the degree of protein binding to polyelectrolyte brushes. The binding of bovine serum albumin (BSA) to poly(acrylic acid) (PAA) brushes was characterized at neutral p…
The solid state properties of cruciform pentamers are examined in thin film preparation, in the single crystalline state and in nanoparticle formulations; emission behavior was found to vary substantially with the solid state morphology. This type of behaviour is an excellent way to manipulate the emissive properties…
Non-symmetric liquid crystal trimers containing three different mesogenic units and two flexible spacers have been synthesised, and exhibit a new smectic modification, the triply-intercalated alternating smectic C phase.
Electrical energy storage is a central element to any electric-drivetrain technology - whether hybrid-electric, fuel-cell, or all-electric. A particularly cost-sensitive issue with energy storage is the high replacement cost of depleted battery banks. One possibility to ease the power burden on batteries and fuel cell…
Organogels are formed through a conventional organogelation involving a heating process and an in situ organogelation at room temperature. The conventional organogelation is carried out by dissolution of gelators by heating, while the in situ organogelation is performed by mixing of highly reactive methyl 2,6-diisocya…
A systematic in vitro biodegradation study of regular poly(ester amide)s (PEAs) composed of naturally occurring hydrophobic alpha-amino acids, fatty diols and dicarboxylic acids using gravimetric (weight loss) method was carried out in the presence of hydrolases like alpha-chymotrypsin, lipase and a complex of proteas…
The change in fracture toughness and its dependence on the content of clay nanoplatelets and adhesion at the interface between clay nanoplatelets and anhydride-cured epoxy matrix are discussed. Three clay nanoplatelets with different chemical modifications were used in this investigation. To fabricate nanocomposites,…
The performance of a solid oxide fuel cell fueled with flames of combustible gases, liquids, and solids was studied. A cell structure in which cells were serially integrated within a disk was also examined. Open-circuit voltages indicated with a single cell and the integrated cell were ∼0.8 and ∼3.5 V, respectively. M…
In situ gamma spectroscopy has been employed to characterise natural radiation in the soil at 32 locations in the Delta region of Nigeria. The outdoor gamma dose rates in the air due to 40K, 238U and 232Th in the soil were 1.5 +/- 0.9 nGy h(-1), 6.9 +/- 1.6 nGy h(-1) and 16.3 +/- 3.1 nGy h(-1) respectively. The estima…
Aims were to observe pharmacokinetics, pharmacodynamics, and toxicity for constructing a Sino-pegylated liposomal platform. Human hepatocarcinoma cells (Bel7402) and murine hepatocarcinoma cells (H(22)) were used for the cytotoxicity assay and the in vivo solid xenograft tumor model in mice, respectively. Pharmacokine…
The enzyme N-acetylglucosamine-6-phosphate deacetylase, NagA, catalyzes the hydrolysis of the N-acetyl group of GlcNAc-6-P to yield glucosamine 6-phosphate and acetate, the first committed step in the biosynthetic pathway to amino-sugar-nucleotides. It is classified into carbohydrate esterase family CE-9 (see afmb.cnr…
The layered double hydroxides (LDHs), [LiAl2(OH)6]nX·qH2O (Xn− = Cl−, Br−, NO3−, SO42−) spontaneously lose both Li+ cations and Xn− anions to give crystalline Al(OH)3 on stirring in water. The kinetics of this topochemical de-intercalation reaction have been studied using time-resolved, in-situ energy dispersive X-ray…
Core/shell nanomaterials composed of only polypyrroles (PPys) were fabricated by microemulsion polymerization using two oxidants with different chemical oxidation potentials, and used as a precursor for the fabrication of PPy and carbon nanocapsules.
Fifteen Keggin-anion-derived polytungstates [TW11O39[MCH2CH2X]]n- (T = Si, Ge, Ga; M = Sn, Ge; X = COOH, COOCH3, CONH2, CN; n = 5, 6) were prepared in aqueous or aqueous-organic solution from the corresponding lacunary polytungstates and trichlorotin and -germanium precursors, and were isolated as caesium salts. The d…
In this survey I will try to describe how Fourier analysis is used in the study of translational tiling. Right away I will emphasize two restrictions that separate this area from the general theory of tilings. These keywords were added by machine and not by the authors. This process is experimental and the keywords ma…
Metal dichalcogenide nanotubes and in particular those of WS2 were shown to exhibit some unique physical and chemical properties, which offer numerous applications for this kind of nanophase material. Using a fluidized bed reactor (FBR), WS2 nanotubes were obtained in substantial amounts recently, rendering a systemat…