A cost-efficient system was developed for the production of single cell oil from lignocellulosic biomass. The pretreatment of corn stover by ammonium carbonate-steam explosion was performed. A maximum lignin removal rate of 47.26% was observed and confirmed by SEM, XRD and FTIR. In the process o...

To directly obtain solution of (NH4)2WO4 instead of Na2WO4 is the key for developing a cleaner technology of ammonium paratungstate production. In this paper, ammoniacal ammonium carbonate solution was adopted for leaching tungsten from the converted product, a mixture of H2WO4 and CaSO4 obtaine...

Green tea and (−)-epigallocatechin gallate (EGCG: one of the main components of green tea) are reported to have cancer-preventive activity in humans. A previous SAR study of EGCG and derivatives indicated that a galloyl group is essential for the activity. To test this hypothesis, we synthesized...

In the search of better antioxidants for different applications, we have designed and synthesized two series of antioxidants that possess surfactant properties: glucosyl- and glucuronosyl alkyl gallates. They display better surface-active efficiency that alkyl gallates and some show critical mic...

The antioxidant activity of gallic acid and a series of alkyl gallates (C4–C18) and glycosylated alkyl gallates (C4–C18) on fish oil-in-water emulsions was studied. Three types of emulsifiers, lecithin, Tween-20 and sodium dodecyl sulphate (SDS) were tested. A nonlinear behavior of the antioxi...

Dextran-covered poly(d,l-lactide) (PLA) nano- and microparticles were prepared using an emulsion/solvent evaporation (or diffusion) process for the encapsulation of alkyl gallates (AGs). In the first step, a solution of PLA and AG in ethyl acetate was emulsified to give an aqueous phase containi...

A metaphosphate NaFe(PO3)3 compound has been obtained by solid state method here. This title compound belongs to the orthorhombic structure with the space group of P212121 (No. 19) and lattice parameters of a = 14.3390(3) Å, b = 14.3374(2) Å, c = 14.3642(1) Å. Its structure can be described as m...

In order to understand the influence of SrO content on the structure, physical properties and thermochemistry of sodium-strontium metaphosphate glasses, a series of glasses having the formula (50-x) Na2O-x SrO-50 P2O5, with x ranging from 0% to 50% molar, have been prepared by melt quenching tec...

Sodium metaphosphate glasses containing divalent metal oxide, ZnO or CdO with composition 50 P2O5 – (50 − x) Na2O – x MO (ZnO, or CdO) where x = 0, 10, 20 (mol%) were prepared by conventional melt method. UV/visible spectroscopy and FTIR spectroscopy are measured before and after exposing to s...

Two series of glasses, the first with the formula (50-x/2)Na2O-xCaO-(50-x/2)P2O5 and an oxygen over phosphorus O/P ratio between 3 and 3.33 and the second with the composition (50-x)Na2O-xCaO-50P2O5 with an O/P = 3, were obtained by melt quenching and studied in order to understand the effects o...

Sodium metaphosphate glasses with successive increasing added Bi2O3 contents (5–40%) were prepared to improve their chemical stability and increase their optical and thermal properties through the additional building BiO6 and BiO3 units. The optical spectrum of the base metaphosphate glass reve...

(E)-1-(2-aminophenyl)-3-(pyridine-4-yl)prop-2-en-1-one (or simply 2-aminochalcone) was synthetized and characterized by elemental analysis, FT-IR, NMR, MS and XRD. Molecular geometry optimization, vibrational harmonic frequencies, 1H and 13C NMR chemical shifts were calculated by ab initio (HF a...

The development of a photoelectrochemical cell for the self-powered determination of propyl gallate (PG) is presented. The photoelectrochemical measurements were performed in a two-compartment self-powered photoelectrochemical cell (SPPC) based on CdSe/CdS/FTO as photoanode for the PG determinat...

Present work focuses on the differences in the performances obtained in the froth flotation of copper smelter slag with multiple collector viz. sodium iso-propyl xanthate (SIPX), sodium di-ethyl dithiophosphate (DTP) and alkyl hydroxamate at various dosages. Flotation tests were carried out usin...

It has been shown that AgX zeolite has a distinctly higher adsorption capacity compared to NaX, NiX and NiAgX zeolites for ethyl mercaptan. Chosen as the best adsorbent, the adsorption isotherms of ethyl, iso-propyl, n-butyl and iso butyl mercaptans on AgX zeolite at three different temperatures...

We have developed a heterogeneous catalyst for the decomposition and removal of dimethyl sulfide used as an odorant in fuels such as city gas in residential fuel cell systems. For the dimethyl sulfide decomposition at 500 °C over various oxides such as γ-Al2O3, TiO2, ZrO2, CeO2, SiO2, and MgO,...

More than half of the global cobalt supply from primary sources is currently produced in the Democratic Republic of Congo (DRC) from ores containing copper-cobalt oxides or copper-cobalt sulphides. Where oxide and sulphide cobalt-bearing copper minerals occur together, efficient recovery of copp...

The reaction of methyl iodide with tert-butylphenylsulfide in DMF leads to a transalkylation that produces methylphenylsulfide. This transalkylation reaction was further studied by 1H NMR spectroscopy. The polarity of the solvent, the electron density on the sulfur atom, and the strength of the ...

The reactions of dimethyltin(IV)chloride with different N-alkyl-N-phenyl dithiocarbamate ligands in 1 mol equivalence yielded complexes of the type [(CH3)2SnL1L3] (1) and [(CH3)2SnL2L3] (2), where (alkyl = methyl (L1), ethyl= (L2) and butyl (L3). The complexes were characterized using spectrosco...

The eudesmane-type methylene lactones (isoalantolactone, alantolactone, 4,15-epoxyisoalantolactone, 2′,2′-dichloro-4H-spiro[cyclopropane-1′,4-eudesma-11(13)-en-8β,12-olide], and alantolactone) react with 8-bromoxanthines (8-bromocaffeine, 8-bromotheobromine, 8-bromo-3-butyltheobromine, 8-bro...