Photocatalytic water splitting, which directly converts solar energy into hydrogen, is one of the most desirable solar-energy-conversion approaches. The ultimate target of photocatalysis is to explore efficient and stable photocatalysts for solar water splitting. Tantalum (oxy)nitride-based mate...

The non-linear current (I)–voltage (V) characteristics of titanium dioxide doped with small quantities of tantalum and barium (99.9 TiO2 + 0.1 Ta and 99.4 TiO2 + 0.1 Ta + 0.5 Ba, all are in at.%) were investigated. These samples have the non-linear coefficient (α) values of (20–30) with high ...

The electromagnetic interference (EMI) shielding properties of polypyrrole/barium ferrite/tantalum pentoxide nanocomposite were studied in the X-band frequency range from 8.2 GHz to 12.4 GHz. The nanocomposites were chemically synthesized at room temperature and then characterized by various tec...

The correlation between the dielectric properties and the structural characteristics of Ta2O5 (Tantalum Oxide) doped BaTiO3 (Barium Titanate) ceramics were investigated under different sintering conditions in this research. The raw materials of making Tantalum Oxide doped Barium Titanate were Ta...

Aminoguanidinium(1+) dihydrogen phosphate was prepared by crystallization from aqueous solution. On the basis of the results of DSC measurements, X-ray structural analysis was carried out at temperatures of 160, 215 and 293 K for three aminoguanidinium(1+) dihydrogen phosphate phases (I|>222K|P1...

RésuméLa fixation de la malouetine 1, une diamine stéroïdique quaternaire, sur le DNA en double hélice a été suivie par spectroscopie ultraviolette dans différentes conditions de concentration, de force ionique et de température.L'analyse des variations de l'absorbance du DNA à...

In this work the synthesis and characterization of new gold(III) complexes with quinoline ligands are described. These complexes contain different steric and electronic properties of the donor atom at 8-position of the quinoline in order to modulate their stability and their biological activity....

An optical sensor for the direct measurement of Ni2+ ion was developed. The basic element of this optode is the immobilization of 1-p-tolyl-3-(3-(trifluoromethyl)phenyl)triaz-1-ene 1-oxide on a triacetyl cellulose membrane. Spectrophotometric studies of complex formation between the triazene-1-o...

A triacetyl form of α-melanocyte-stimulating hormone (MSH) was found in carp (Cyprinus carpio) and goldfish (Carassius auratus), by selective detection of mass profile for cell secretory granules using direct tissue matrix-assisted laser desorption ionization with time-of-flight mass spectromet...

The purpose was to study in vitro metabolism of 2′,3′,5′-triacetyl-6-azauridine (1) by porcine liver esterase (PLE) and in human plasma using an automated analytical system developed previously. A gradient-LC method was developed to study the concentration-time course of 1 and its metabolites...

Nucleophilic ring opening of aziridines involving attack of the nitrogen atom of Z-oxime anions generates nitrones which are then trapped in 1,3-dipolar cycloaddition reactions with N-methylmaleimide to afford 1:1 mixture of endo- and exo-cycloadducts.

Monochiral N-Diphenyphosphinyl aziridines (‘N-Dpp aziridines’) may efficiently be prepared from monochiral 2-aminoalcohols. Such aziridines undergo ring-opening reaction with a variety of nucleophiles in good yield. Dephosphinylation is accomplished under mild conditions.

A series of 1-aminoethyl-3-arylsulfonyl-1H-pyrrolo[2,3-b]pyridines 10a–z was prepared as novel 5-HT6 ligands. The best compounds were high affinity, full agonists at 5-HT6 receptors. Several agonists demonstrated good selectivity over other serotonergic and dopaminergic receptors. Acute adminis...

Janus kinases (JAKs) regulate various inflammatory and immune responses and are targets for the treatment of inflammatory and immune diseases. As a novel class of immunomodulators targeting JAK3, 1H-pyrrolo[2,3-b]pyridine-5-carboxamide derivatives are promising candidates for treating such disea...

Four series of phenylpyrimidine-carboxamide derivatives bearing 1H-pyrrolo[2,3-b]pyridine moiety (14a–e, 15a–g, 16a–e and 17a–g) were designed, synthesized and evaluated for the IC50 values against three cancer cell lines (A549, PC-3 and MCF-7). Four selected compounds (15e, 16a–b and 17a) ...

Reaction of indoles with 2,2,4,4-tetrakis(trifluoromethyl)-1,3-dithietane 1 in the presence of CsF catalyst led to the rapid and high yield formation of indoles bearing a SCH(CF3)2 group in the 3-position. The same reaction carried out in the absence of catalyst unexpectedly resulted in the form...

There is currently great interest in developing drugs that stimulate myelin repair for use in demyelinating diseases such as multiple sclerosis. Thyroid hormone plays a key role in stimulating myelination during development and also controls the expression of important genes involved in myelin r...

Glycine based peptide nucleic acid (PNA) monomers are useful in the construction of PNA oligomers which are, in general, hydrophobic in nature. To overcome this huddle, serine based peptide nucleic acid (PNA) monomer was synthesized which will a good candidate in terms of increasing hydrophilici...

Molds were isolated from natural and processed Cheddar cheese previously treated with potassium sorbate. When potato dextrose agar fortified with up to 8,400 ppm potassium sorbate and adjusted to pH 5.3 to 5.5, served as the substrate, Penicillium roqueforti, a mutant of P. roqueforti, Penicilli...

Rapid evaluation of sorbate/reactant shape-selectivity of medium-pore zeolites at operating conditions using isothermal and non-isothermal techniques (i.e., temperature-programmed desorption under Chromatographie conditions) has been described. The shape-selectivity of silicalite in sorption of ...