Three water-soluble pyridylazoaniline reagents were synthesized and their application as spectrophotometric reagents for iron(II), copper(II), nickel(II) and cobalt(III) was investigated. Of the three reagents, 2-(5-bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)aniline (5-Br-PSAA) was found...

2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)aniline rapidly forms a water-soluble complex with palladium in an acetate-buffered medium at pH 3.2.The molar absorptivity of the complex is 9.84×104l mol−1 at 612 nm. The calibration graph is linear over the range of 10–100 μg l−1 pall...

ObjectiveTo develop a simple, novel, sensitive, precise and specific RP-HPLC method for the determination of Tapentadol hydrochloride in bulk and its tablet dosage forms.

Background: Tapentadol hydrochloride is a centrally acting oral analgesic approved by the US Food and Drug Administration in November 2008 for the treatment of moderate to severe acute pain. It is available as immediate-release 50-, 75-, and 100-mg tablets.Objective: The purpose of this article ...

Changes in intracellular calcium (Ca2+) levels in response to developmental processes or external stimuli serve as signals in eukaryotic cells. These Ca2+ signals are likely perceived through sensor proteins that bind Ca2+ by EF-hand (a helix-loop-helix structure) motif. Calmodulins (CaMs), a gr...

Computational quantum chemical study and biological evaluation of a synthesized novel sulfur heterocyclic thiophene derivative containing 1,2,3-triazole and pyridine moieties namely BTPT [2-(1-benzyl-5-methyl-1H-1,2,3-triazol-4-yl)-6-methoxy-4-(thiophen-2-yl) pyridine] was presented in this stud...

A new 2,5-di-(2-thienyl)-1H-pyrrole (SNS) moiety containing perylenediimide (PDI) acceptor as pendant side chain has been synthesized for an electroactive monomer and then directly deposited onto ITO/glass surface via electrochemical polymerization process. The observed electronic interaction on...

The syntheses of five pyrazine-2,3-dicarbonitriles, substituted with combinations of electron donating substituents, namely 5-methylthiophen-2-yl or thiophen-2-yl and the electron withdrawing substituent pyridin-3-yl, are reported. The compounds were obtained from the condensation of diaminomale...

A new regioselective method for the synthesis of 2-aryl-5-benzoylpyridine derivatives has been developed. The reaction proceeds via ring opening and closing cascade mechanism (ROCC) of isoxazole to synthesize various functionalized pyridine derivatives. This is the first report for the preparati...

Magnesium hydroxide as coagulant for treating high pH reactive orange wastewater was studied. The floc formation kinetics was investigated with a laser particle analyzing system under different experimental conditions. Floc formation time tended to decreases with the increase of coagulant dose, ...

The sonochemically synthesized Ho-doped ZnO nanoparticles were characterized by XRD, SEM, TEM, and XPS techniques. The sonocatalytic degradation of Reactive Orange 29 (RO29) was greater than that with sonolysis alone. DE% declines with the addition of chloride, carbonate, sulfate, and tert-butan...

Cross-linked chitosan/sepiolite composite was prepared from sepiolite clay and chitosan, and was cross-linked using epichlorohydrin. Among the various weight ratio percentage of chitosan and sepiolite clay composites, CS50SP50 was selected as the best adsorbent for both methylene blue (MB) and r...

The adsorption potential of empty cotton flower agro-residue based activated carbon (CFAC) to adsorb Reactive Orange 84 (RO84) dye from aqueous solution was studied using packed-bed adsorption column. The breakthrough curve characteristics were highly influenced by process variables like influen...

Nanofiber membrane chromatography integrates liquid membrane chromatography and nanofiber filtration into a single-step purification process. Nanofiber membrane can be functionalised with affinity ligands for promoting binding specificity of membrane. Dye molecules are a good affinity ligand for...

In this work, Box–Behnken design (BBD) in response surface methodology (RSM) was applied to optimize the synthesis condition of crosslinked chitosan-tripolyphosphate/TiO2 nanocompsite (CCTPP/TiO2 NC) as well as the adsorption conditions of reactive orange dye (RO16) from aqueous solution. The k...

The photocatalytic activity of granite waste (GW), an iron-rich material, was evaluated by the decolorization and degradation of Reactive Orange 122 (RO122) in the presence of H2O2 by solar photo-Fenton. X-ray powder diffraction (XRD), 57Fe Mössbauer spectroscopy, and scanning electron microscop...

Through the fine tuning of the activity-sensitive aminoalkoxy moiety of 4,6-bisphenyl-2-(3-alkoxyanilino)pyrimidine as a novel inhibitor of the receptor for advanced glycation end products (RAGE), the tertiary amine was elucidated as an essential part associated with RAGE inhibition. On the basi...

By means of capillary gas chromatography urine samples of patients with cerebrotendinous xanthomatosis (CTX) were investigated before and during treatment by oral administration of chenodeoxycholic acid. The occurrence of various conjugated bile alcohols, presumably glucuronides, was demonstrate...

Urine samples and serum samples of a patient with cerebrotendinous xanthomatosis (CTX) were investigated by means of capillary gas chromatography, both before and during oral treatment with ursodeoxycholic acid (UDCA), and the results compared with those obtained during chenodeoxycholic acid (CD...

This study is aimed to further investigate the anti-atopic dermatitis (AD) activities of dehydroxymethylepoxyquinomicin (DHMEQ) ointment and compare its effect with that of tacrolimus ointment based on the previous study that DHMEQ improves AD-like lesions. AD were induced by 2,4-dinitroclilorob...