Fe(III)-bearing clay minerals are ubiquitous in the environment. However, the fate of organic contaminants mediated by structural Fe(III) in clays was rarely reported. Here we demonstrated that hydroxylated polychlorinated diphenyl ethers (HO-PCDEs) could be spontaneously formed from the reactio...

In this work, direct As(III) removal without pre-oxidation by the in-situ generated Fe(III) hydroxide derived from ferrous sulfate on the surface of calcium carbonate was investigated. The coagulation sediments were characterized by XPS, Zeta potential, AFM and SEM, respectively and the mechanis...

Previous studies have shown that the oxidation of Fe(II) by molecular oxygen can lead to the co-oxidation of As(III) at neutral pH. However, the mechanism of As(III) oxidation in the presence of Fe(II) with respect to the interaction between As(III) and Fe(II) is still unclear. In this work, we ...

Trivalent rhodium was determined spectrophotometrically as its 1:2 rhodium o-methylphenyl thiourea (OMPT) complex, extracted into chloroform from aqueous acetate buffer media at pH 5.4. The complex exhibits maximum absorption at 320 nm (Molar absorptivity 9.76 × 103 L mol−1 cm−1), Sandell’s se...

All of the data obtained by electrochemical methods involving the mercury electrode, spectrophotometry and conductometry have showed the stepwise formations of a neutral σ-donor-acceptor pentacoordinated NiX2-L3 and a cationic tetracoordinated NiL42+, associated with a shift in the dissociation...

Multiple complexes of 20S proteasomes with accessory factors play an essential role in proteolysis in eukaryotic cells. In this report, several forms of 20S proteasomes from extracts of Spodoptera frugiperda (Sf9) cells were separated using electrophoresis in a native polyacrylamide gel and exam...

We have developed a sensitive and specific HPLC-fluorescence assay for the determination of estradiol-3-glucuronide and estradiol-17-glucuronide in human and rat liver microsomal incubations. The method utilizes a mobile phase comprised of acetonitrile and 50 mM ammonium phosphate buffer (35:65,...

The preparation and antigenic properties of estradiol 3-glucuronide-bovine serum albumin (BSA) conjugate in which the hapten is coupled to the carrier protein through the aminomethyl group at C-6 by glutaraldehyde, have been described. Antibody raised against the immunogen in the rabbit possesse...

The effect of the co-infusion of ursodeoxycholate and its taurine conjugate, 3-O-glucuronide and 3,7-disulfate on estradiol-17β-glucuronide-induced cholestasis was examined. Estradiol-17β-glucuronide was intravenously administered to bile-drained rats at a rate of 0.075 μmol/min/100 g for 20 ...

We have recently shown that several classes of glucuronide metabolites, including the morphine metabolite morphine-3-glucuronide and the ethanol metabolite ethyl glucuronide, cause toll like receptor 4 (TLR4)-dependent signaling in vitro and enhanced pain in vivo. Steroid hormones, including est...

We have previously found that repeated exposure to heroin reduces liver synthesis of morphine-3-glucuronide (M3G) and increases the production of morphine-6-glucuronide (M6G), which normally is not formed in the rat. By contrast repeated exposure to naltrexone does not activate M6G synthesis but...

Laboratory degradation tests with two model estrogen conjugates, 17ß-estradiol-3-glucuronide (E2-3G) and 17ß-estradiol-3-sulphate (E2-3S), using river water and sediment as inoculum under aerobic conditions were investigated. Throughout the 14-day incubation, degradation of E2-3G in river water,...

The N-3 position of a series of 3-phenoxypropyl piperidine benzimidazol-2-one analogues was optimised using the predictive power of a CoMFA model. The model was used to prioritise compounds for synthesis culminating in the triazole (+)-24. (+)-24 was found to be a high affinity, potent NOP agoni...

The preparation of compounds incorporating the 3-hydroxy-2-methyl-1-alkyl moiety of high diastereomeric purity is described. Such compounds can serve as potential building blocks for the preparation of several kinds of natural products. Diastereoselective synthesis of two potential pine sawfly p...

A numerical simulation is designed in order to better understand the selective catalytic reduction of NOx by propane (C3H8-SCR) in the presence of hydrogen. The simulation was designed for a single channel of a monolith typical for automotive catalytic converters, coated with a silver alumina ca...

In the previous study, it was exhibited that composite membrane prepared from 2,2-bis[4-(2-hydroxy-3-methacryloyloxy propoxy)phenyl]propane (Bis-GMA) had slightly lower salt rejection than that prepared from m-phenylenediamine (MPDA) and trimesoyl chloride (TMC), while water permeability of the ...

The conversion of propane in the presence of oxygen over alumina has been studied using a fixed bed flow reactor. The interaction of the same catalyst with propane, propene, isopropanol and acetone has also been investigated, with additional gas-phase monitoring, in an FT-IR cell. Alumina looks ...

Reaction kinetic studies of propane conversion to aromatics were conducted on an HZSM-5 zeolite at a pressure of 1 atm, temperatures in the range 793–823 K, and different space times (0–12 gcat h/mol). The rates of production of methane, ethane, ethene, propene, propane, butane, butene, benzen...

To understand possible reaction pathway for propane selective oxidation to acrolein over the MoPO/SiO2 catalyst, the surface species formed by adsorption of the reactant (propane), possible intermediates or their probe molecules (propene, isopropanol, 1-propanol, 2-Br-propane, allyl alcohol) as ...

The gas phase reaction of V4O10+ with propane is studied by infrared photodissociation spectroscopy combined with density functional calculations. Mass-selected V4O10+ clusters react with propane under thermalized, multiple collision conditions in a buffer gas filled ion trap at 100 K. Two main ...