An untargeted method using headspace solid-phase microextraction coupled to electronic nose based on mass spectrometry (HS-SPME/MS-eNose) in combination with chemometrics was developed for the discrimination of oranges of three geographical origins (Italy, South Africa and Spain). Three multivar...

The purpose of this study was to evaluate volatile compounds and sensory acceptance of HHP processed orange juice compared with non-processed and pasteurized orange juices. RSM and sniffing were successfully applied for optimization of HS-SPME conditions. The chosen HS-SPME conditions 37 °C dur...

A laser-tuned whispering gallery modes (WGMs) microsphere resonator integrated with ethyl-orange-(EO-) doped polyvinyl alcohol (PVA) coating has been proposed and experimentally demonstrated. Owing to the photo-induced isomerization feature of the azo-doped coating, the WGM resonance wavelength ...

The all-optical switching polymer thin films with azobenzene dye ethyl orange as the guest material and polyvinyl alcohol (PVA) as the host material were prepared by adulteration and spin-coating methods. The all-optical switching characteristics of the samples were measured at different intensi...

A compact light-intensity-controlled Mach–Zehnder interferometer has been proposed by exploiting the photosensitivity of ethyl orange solution in combination with the evanescent field property of a microfiber-assisted Mach–Zehnder structure. We have experimentally investigated the influences o...

A new class of functionalized 3-(benzofuran-2-yl)-5-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazole scaffolds (4a–q) was synthesized by a four step reaction in good yields. Initially, o-alkyl derivative of salicyaldehyde (1) readily furnished corresponding 2-acetyl benzofuran (2) on treatment with po...

(E)-2-Methoxy-4-(3-(4-methoxyphenyl) prop-1-en-1-yl) phenol (MMPP), a new (E)-2,4-bis(p-hydroxyphenyl)-2 - butenal derivative, reportedly has therapeutic effects such as anti-arthritic properties. Although previous studies showed that MMPP has anti-arthritic effects on rheumatoid arthritis (RA),...

The 5-(5-nitro furan-2-ylmethylen), 3-N-(2-methoxy phenyl), 2-N′-(2-methoxyphenyl) imino thiazolidin-4-one compound has been synthesized and fully characterized by FT-IR, 1H and 13C NMR spectroscopy. The crystal structure of the title compound was investigated by X-ray powder diffraction (XRPD)...

A versatile and highly atom economical catalytic system consisting of [Cp∗IrCl2]2/NaHCO3 (Cp∗=pentamethylcyclopentadienyl) for the N-alkylation of amines with primary and secondary alcohols as alkylating reagents has been developed. For example, the reaction of equimolar amounts of aniline and b...

Supported bimetallic nanoparticles (NPs) are extensively used as efficient oxidation catalysts. A series of Au–Ni bimetallic alloy NP catalysts with Au:Ni mole ratios varying from 1:0.35 to 1:4.76 was successfully synthesized via impregnation and H2 reduction. The catalysts are supported by a m...

In this study, homogeneous alloy AuPt nanoparticles were successfully immobilized on ultrathin TiO2 nanorods via a facile photodeposition technique. The AuPt/TiO2 hybrid exhibited high photocatalytic activity and stability during the selective photosynthesis of benzaldehyde from benzyl alcohol u...

Many organophosphorus (OP) and methylcarbamate (MC ) insecticides and related compounds. when injected into the yolk sac on day 4 of incubation, markedly lower chicken embryo NAD levels at day 12 of incubation. The same compounds also produce drastic developmental defects. suggesting that the lo...

Comparative in vitro metabolic activity of human and rat liver fractions toward 5 ring-substituted methylcarbamates are reported. Human liver appeared to be less metabolically active than rat liver toward 4-dimethylamino-3,5-xylyl methylcarbamate (Zectran), 4-dimethylamino-3-cresyl methylcarbama...

The mer-[Co(pydca)(H2O)3(ina)]·H2O (1), (2a3mpyH)2[Co(pydca)2(H2O)2]·2H2O (2) and (2a6mpyH)2[Co(pydca)2(H2O)2]·2H2O (3) complexes (H2pydca: pyridine-2,5-dicarboxylic acid, ina: isonicotinamide, 2a3mpy = 2-amino-3-methylpyridine and 2a6mpy = 2-amino-6-methylpyridine) were synthesised and chara...

Vanadium pentafluoride dissolves in anhydrous hydrogen fluoride to give clear 3·3 M solutions at saturation. Raman spectra of such solution show that no ionization occurs, but that the vanadium pentafluoride is strongly solvated to give a species of unknown composition. The solutions are non-co...

The enthalpy of neutralization of aqueous hydrazine with hydrofluoric acid was determined to be −13.4 kcal mol−1 at 25 °C. The enthalpy of solution ΔHs of hydrazinium monofluoride in water is 0.832 kcal mol−1, whereas ΔHs for hydrazinium difluoride in the same solvent is 9.64 kcal mol−1. To c...

The proton-conducting gel electrolytes (PCGEs) based on PMMA, PVdF or PVdF-HFP doped with solutions of phosphonic acid or ammonium based protic ionic liquids (PILs) in DMF have been synthesized. Rather high values of the conductivity (10−4–10−3 S cm−1) have been reached at low dopant concentrat...

Matrix acidizing treatments are applied to gas wells to remove near-wellbore permeability impairment (formation damage). This work relates to the use of some alcoholic components as a retarding agent in gas field acidizing operations to reduce rate of calcium carbonate (dolomite MgCa(CO3)2) diss...

Phenol/acetone cogeneration via cumene hydroperoxide (CHP) cleavage has been demonstrated using various classes of novel solid acid catalysts. Mineral acid-treated montmorillonite silica-alumina clays, heteropoly acids impregnated into Group IV oxide supports, fluorophosphoric acid and HF-treate...

Since years, ion exclusion chromatography (ICE) has been the standard method to separate strong acid analyte anions from concentrated weak acid matrices such as hydrofluoric acid (HF). In this work, the commercially available IonPac ICE-AS1 column was used to separate trace levels of chloride, n...