Crystallization of struvite (MgNH4PO4·6H2O, MAPH) for both N and P recovery from municipal wastewater is an attractive alternative. The low magnesium concentration in calls low-cost sources. In the present work, precipitation supersaturated solutions was investigated. were prepared by addition either slurry Mg(OH)2 (brucite) obtained hydrothermal treatment oxide (MgO) or using aqueous solution ...

The infrared absorption spectra of lipids have been studied by numerous investigators chiefly interested in using the spectra to identify the various substances studied or for quantitative estimations. However, the spectra can be further used to obtain an understanding of the ionic groups that are present in the molecule and to identify changes in ionic structures arising as the lipid reacts wi...

The imine podands tris[(2-nitrobenzylidene)aminoethyl]amine and tris[(2-nitrobenzylidene)aminopropyl]amine both stabilize copper(I), forming {tris[(2-nitrobenzylidene)aminoethyl]amine-kappa4N}copper(I) perchlorate acetonitrile disolvate, [Cu(C27H27N7O6)]ClO4.2CH3CN, (II), and {tris[(2-nitrobenzylidene)aminopropyl]amine-kappa4N}copper(I) perchlorate, [Cu(C30H33N7O6)]ClO4, (VI), respectively. The...

In the paper, fermentation conditions and medium of bacillus subtilis protease production were optimized to improve outcome produced from provide premium raw materials for subsequent preparation chitin crab shell. The optimal are temperature at 39°C, pH value 7.5, time 60h, inoculum size 5%, filling volume 80/250mL, rotational speed 180r/min; component ratio is 1.25% starch mass concentration, ...

The main objective of the work discussed in this paper was evaluation of a chromatographic method for simultaneous determination of hydrochlorothiazide (HCTZ), lisinopril (L), and their impurities in pharmaceuticals. Chlorothiazide (CTZ) and disulfonamide (DSA), as potential impurities in hydrochlorothiazide, and diketopiperazine (DKP), as an impurity of lisinopril, were analyzed. The chromatog...

Two reversed-phase liquid chromatographic (RP-LC) methods are described for the determination of two binary mixtures of hypoglycemic agents. In the first method, vildagliptin (VDG) was determined in the presence of 3-amino-1-adamantanol (AAD), a synthetic intermediate and impurity of VDG. In the second method, pioglitazone hydrochloride (PGZ) and metformin hydrochloride (MET) were simultaneousl...

In this work, we have demonstrated the suitability of a novel Deep Eutectic Solvent (DES) composed cholinium dihydrogen phosphate and ethylene glycol at molar ratio 1:2 (ChDHP:EG) to extract Candida antarctica lipase B from aqueous solutions non-ionic surfactants Triton X-100 Tween 80. The binodal curves were firstly explored temperatures between 298.15 333.15 K experimental data correlated by ...