Vanadium supported on highly ordered nanoporous silica (VOx-LUS-1) was synthesized and characterized by XRD, Nitrogen adsorption‑desorption isotherms and UV-visible spectrophotometer. Direct oxidation of benzene to phenol in liquid phase by H2O2 peroxide were examined by using various solvents (methanol, acetone, acetic acid, acetonitryl). The maximum yield (25%) and selectivity (73%) of the ph...

This paper studies the transformation of phenol and of 3,5-dichlorophenol (3,5-DCP) upon UVA irradiation of anthraquinone-2-sulfonate (AQ2S). Light-excited AQ2S is able to oxidise phenol, 3,5-DCP, and AQ2S. Transformation reactions do not proceed at a significant extent in the absence of molecular oxygen, in which case recombination reactions of initially formed oxidised and reduced radical spe...

Efficient bioconversion of glucose to phenol via the central metabolite tyrosine was achieved in the solvent-tolerant strain Pseudomonas putida S12. The tpl gene from Pantoea agglomerans, encoding tyrosine phenol lyase, was introduced into P. putida S12 to enable phenol production. Tyrosine availability was a bottleneck for efficient production. The production host was optimized by overexpressi...

Phenol biodegradation by Ralstonia eutropha was modeled in different culture modes to assess phenol feeding in biotechnological depollution processes. The substrate-inhibited growth of R. eutropha was described by the Haldane equation with a Ks of 2 mg/L, a Ki of 350 mg/L and a mumax of 0.41 h(-1). Furthermore, growth in several culture modes was characterized by the appearance of a yellow colo...

Herein, we prepared a V/SBA-16 catalyst using vanadyl acetylacetonate as a precursor and SBA-16 nanoporous silica as a support via an immobilization technique. The ordered mesoporous structure of catalyst was determined by X-ray diffraction  and transmission electron microscopy techniques , and the catalyst was evaluated in the benzene hydroxylation to phenol with hydrogen peroxide (H2O2) as a ...

Kiwifruit requires a high quantity of nutrients that must be supplied through fertilization to obtain an optimum yield on a sustainable basis. This research was conducted to evaluate different fertilization methods including broadcast application (as control), deep placement of the fertilizer and fertigation, alone or in combination with foliar application and their effects on the yield, leaf m...

The research used an artificial neural network (ANN) to examine optimum extraction conditions and phytochemical contents of Luffa cylindrica seed oil. oil yield was predicted using network. performance the ANN response surface methodology models compared. yielded 7.567% yield, 185.676 mg/l phenol, 45.087 terpineol at 75.57 °C temperature, 5.77 h time, 10.68 g/mol n-hexane concentration, respect...

On the way towards a new total synthesis of (S)-arogenate, a novel aryl-λ(3)-iodane-mediated oxidative spirocyclization of para-substituted phenol derivatives has been discovered. Starting from easy accessible 2-(4-hydroxybenzamido)acrylates we could construct spirocyclic lactams in up to 52% yield. Under alternative reaction conditions the same precursors underwent an unexpected oxidative spir...

This paper describes a series of environmental chamber experiments and gas/particlephase chemical analysis performed in order to elucidate the mechanisms of SOA formation from biomass burning intermediates: phenol, guaiacol, and syringol under low NOx conditions. Time-profiles of signals observed by the CIMS, in comparison with SOA mass, suggested that ring-fragment carboxylic acids were in equ...