To develop an efficient method for degradation of grape seed and skin proanthocyanidins polymers into oligomers, an optimized sulphurous acid degradation conditions for grape seed with the temperature of 60 °C, reaction time of 60 min and sample-sulphurous acid ratio of 1:0.2, and for grape ski...

Sulfur dioxide (SO2) is one of the principal impurities in carbon dioxide (CO2) streams captured from coal-fired power plants, and the synergistic effect of CO2/SO2 on the corrosion of steels has attracted significant recent attention. In this work, the corrosion mechanism of valve steel X80CrSi...

Holmium/Ytterbium co-doped fluorophosphate glasses with compositions (80-x-y) NaPO3-10SrF2-10ZnF2- xHoF3- yYbF3 (x = 1 and y = 0.5, 1, 1.5 and 2 mol%) were prepared by melt-quenching technique. The stability criteria indicate that these glasses exhibit a good resistance against devitrification. ...

Fluorophosphate glass co-doped with Er3+ and Ho3+ ions has been synthesized by high temperature melting method. Using a commercially available 980 nm laser diode, intense about 2 μm emissions were successfully obtained in present Ho3+/Er3+ co-doped glasses without obvious quenching. To understa...

Europium (Eu3+)-doped zinc-fluorophosphate (PKAZfEu) glasses have been synthesized by usual melt-quenching technique. Optical absorption, photoluminescence excitation, photoluminescence and decay curves of these glasses were measured at room temperature and investigated. The Judd-Ofelt (JO) para...

Concentration dependent spectroscopic properties of Ln3+ (Ln= Nd, Sm, Dy and Yb) -doped fluorophosphate glasses have been investigated. From the absorption spectra, Judd-Ofelt (JO) intensity parameters have been evaluated which are in turn used to predict radiative properties for the fluorescent...

The fluorophosphate (PKABfNf:P2O5+K2O+Al2O3+BaF2+NaF2) glasses doped with single and co-doped (Ce and/or Dy) were prepared by conventional melt quenching technique and characterized their luminescence properties. The emission spectra of co-doped glass (PKABfNfCeDy) showed a broad blue band of Ce...

Formation of CuBr nanocrystals in fluorophosphate glass is investigated for the first time. The features of the nanocrystals nucleation and growth during isothermal treatment of the glass are analyzed based on spectral studies results. The mean size of the CuBr nanocrystals formed via thermo-ind...

In recent years, low melting temperature glasses have received wide attention as the hosts of phosphor-converted light emitting diodes (pc-WLED). In this work, a series of trivalent europium doped tin fluorophosphates glasses were prepared by conventional melting method. Under ultraviolet excita...

Silver-containing glasses are promising candidates for photonic applications, due to the potentiality of spectroscopic properties of silver nanoclusters (NC's) and/or silver metallic nanoparticles. In this framework, silver-containing fluorophosphate glasses are candidates with a strong pot...

NaPO3-ZnF2 binary fluorophosphate glasses doped with trivalent erbium and monovalent copper were synthesized by the conventional melting and casting method using ErF3 and CuCl as starting materials. The samples were systematically investigated using X-ray diffraction (XRD), energy dispersive X-r...

The fluorophosphate ion has been widely used as a source of fluoride in dentifrices because of its anticaries properties. Because it is isoelectronic with sulfate, which is known to replace phosphate in apatite, fluorophosphate could be expected to react similarly. In an attempt to incorporate t...

The rates of degradation of N-7 platinated deoxyguanosine (dG) and deoxyguanylyl-(3′-5′)-deoxyguanosine (dGpdG) were followed in 66 mM Tris -HCl (pH 7.4) at 100°C. The half-life for the intramolecular cross-link of cis-diamminedichloroplatinum(II) (cis-Pt) between two neighboring guanines (Pt...

Alcuronium, a neuromuscular blocking drug, was recently introduced to the European Pharmacopoeia. A HPLC method is described to limit the impurities of alcuronium, namely the diallylcaracurine (DAC) and the allyl-Wieland-Gumlich-aldehyde (WCA), to less than 0.5%. Since alcuronium and all impurit...

Fluorodeoxyuridine (5-FdUrd) is an antineoplastic agent with clinical activity against different types of solid tumours. To enhance the effectiveness of this drug, we have synthesised new heterodinucleoside phosphate dimers of 5-FdUrd. These dimers were compared to 5-FdUrd for their cytotoxic ef...

Far-UV irradiation of 2′-deoxycytidylyl-(3′-5′)-thymidine (dCpT) gave rise to the pyrimidine (6-4) pyrimidone adduct and its Dewar valence isomer as the main photoproducts. The absolute configuration of the former adduct was determined and its photoisomerization studied. A comparison of the a...

Mercapto benzothiazole linked 1,2,4-oxadiazole derivatives were designed (4a-u) as new anti-inflammatory agents using bioisosteric approach and docking studies. The docking results clearly indicated that the compounds 4a-u shown good docking interaction towards COX-2 enzyme. In silico drug-like ...

Both racemic ethyl 5-iodo-2-methylcyclohexanecarboxylate (1), known as Mediterranean fruit fly attractant ceralure B1, and its (−)-(1R,2R,5R) enantiomer 1a were conveniently synthesized from commercially available racemic trans-6-methyl-3-cyclohexenecarboxylic acid 2 or its (1R,6R) enantiomer 2a...

Pure cis- and trans-methylcyclohexanecarboxylic acids and their 2-diethylaminoethyl esters have been prepared. The latter were isolated as crystalline hydrochloride salts. They were tested for possible anticancer activity.

Reaction of [2-14C]-cyanamide (1) with D(-) arabinose (2) afforded the oxazoline 3. The reaction of 3 with methyl propiolate gave [2-14C]-2,2′-anhydrouridine (4) having a specific activity of 50 mCi (1.9 GBq) mmol−1 in 25% overall radiochemical yield from labelled barium carbonate. Reaction of ...