Measurements of excess molar enthalpies at the temperature 298.15 K in a flow microcalorimeter, are reported for the ternary mixtures [x 1 {CH 3 (CH 2 ) 3 } 2 O +x 2 (CH 3 ) 3 CCH 2 CH(CH 3 ) 2 + (1 -x 1 ...
An improved process was developed to produce gold with purity >99.9998% (>5 N) from gold scraps using dibutyl carbitol (DBC) as an extractant. The extraction of gold into DBC was optimised, which showed that gold could be effectively loaded into DBC up to 190 g/L Au. Only small amounts of other ...
The building block of N-alkyl derivative of allosamidin (chitinase inhibitor), 4,6-O-benzylidene-N-octyl-d-allosamine hydrochloride was stereoselectively synthesized in two steps under mild conditions. Nucleophilic addition of octylamine to 2-oxoglucopyranoside gave a ‘carbonyl group transfer’...
The thermal dissociation of tri-n-octylamine hydrochloride (TOAHCl) was investigated using both the quantum chemical simulation and experimental methods. The pathway through which a mixture of tri-n-octylamine (TOA) and hydrogen chloride (HCl), rather than di-n-octylamine (DOA) and 1-chlorooctan...
The adsorption and separation of palladium and platinum from an acidic aqueous solution were conducted using microcapsules containing a metal extractant, tri-n-octylamine hydrochloride. The spherical microcapsules with an average diameter of 208μm were prepared through encapsulation of the extr...
We report on the role of the protein molecular state in binding and release of an aroma compound in an aqueous medium. For this purpose, the quantitative binding parameters (these are, a total number of binding sites in the protein molecule, the intrinsic binding constant and Gibbs free energy o...
This paper presents a study of the effect of aroma compound (hexyl acetate, HxAc) on thermodynamic properties of legumin (11S globulin from broad beans) in an aqueous medium (protein conformational stability and protein-protein interactions) by a combination of gas-liquid chromatography, differe...
The present work deals with synthesis of vanadium pentoxide supported on alumina as a heterogeneous catalyst using two approaches as conventional synthesis based on ozonation and intensified approach based on combination of ultrasound with ozonation. Commercially available vanadium sulfate hydra...
This research was aimed to characterize microemulsion systems of isopropyl palmitate (IPP), water, and 2∶1 Brij 97 and 1-butanol by different experimental techniques. A pseudoternary phase diagram was constructed using water titration method. At 45% wt/wt surfactant system, microemulsions conta...
BACKGROUND This study investigated the use of core–shell biocatalysts, synthesized using recombinant lipase B from Candida antarctica (CALB), for the production of isopropyl palmitate and the optimization of this biocatalytic route.RESULTS Initially, three distinct core–shell biocatalysts, wer...
A repeat-batch membrane bioreactor was constructed for the novel bioconversion of isopropyl hexadecanoate to isopropyl cis-6-hexadecenoate by a Rhodococcus mutant. The addition of glutamate, thiamine, and MgSO 4 was very effective in improving not only the rate and yield of the bioconver...
Divalent copper coordination polymers containing aliphatic dicarboxylate and bis(3-pyridylmethyl)piperazine (3-bpmp) tethering ligands exhibit different topologies depending on the length of the polymethylene chain and stoichiometric ratio. {[Cu(succinate)(3-bpmp)]·8H 2 O} n (1)...
Hydrothermal synthesis has generated a series of luminescent cadmium aliphatic dicarboxylate coordination polymers containing the neutral multitopic bis(4-pyridylformyl)piperazine (bpfp) ligand, which were characterized by single-crystal X-ray diffraction, luminescence spectroscopy. {[Cd(suc)(bp...
Using data on heat capacity of sodium decyl sulfate solutions near the third critical micelle concentration, obtained earlier via high-precision scanning calorimetry, the temperature dependences are calculated for the thermodynamic functions of the corresponding micellar transition and the compo...
A study is made of the temperature and concentration dependences for conductance of aqueous sodium decyl sulfate solutions. The nature of hydration of the decyl sulfate anion is discussed within the theories proposed by Samoilov, Gurikov, and Krestov. An analysis is performed of the influence of...
The interfacial tension against hexane of the aqueous solution of the mixture of sodium decyl sulfate (SDeS) and sodium perfluorooctanoate was measured as a function of the total molality and the composition of surfactants at 298.15 K under atmospheric pressure. The miscibility in the adsorbed f...
Extracting polycyclic aromatic structures (PASs)-enriched portion from direct coal liquefaction residue (DCLR) with an energy-efficient way is significantly important for the effective utilization of DCLR. In the investigation, dipropylamine (DPA) with weak polarity was used to extract DCLR as a...
Excess molar enthalpies, HmE, at 298.15K and atmospheric pressure, have been measured, over the entire mole fraction range, by means of a Tian–Calvet microcalorimeter, for the systems: dipropylamine (DPA), or dibutylamine (DBA)+2-propanone,+2-butanone,+2-pentanone, or+2-heptanone. These data, t...
The title reactions with R = Me, Et, n-Pr are studied in a temperature range of 25 ~ 40 o C by spectrophotometry. It is found that the rate with respect to [complex] is unity and that to [amine] is fractional. A linear relationship between [amine]/k o b s and [amine] is...
Fatty acid esters of propylene glycol (1, 2‐propanediol) have been known to the food industry for about 40 years. The specific crystalline properties of distilled propylene glycol monostearate (PGMS) and its ability to stabilize the meta‐stable α‐crystal form of distilled monoglycerides are ...
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