Liquid-liquid extraction using aqueous two-phase systems (ATPSs) presents advantages when compared to traditional liquid-liquid extraction. In this work, the extracting behavior of thallium (III) in the polyethylene glycol-based aqueous two-phase system (PEG–ATPs) was thoroughly investigated. T...

The synthesis of thallium(III) chloride and bromide was performed in solution by chlorination and bromination, respectively, of the suspensions of the corresponding thallium(I) halides in acetonitrile. Crystalline compounds TlX3(CH3CN)2 (X = Cl−, Br−) were prepared from the acetonitrile solution...

The paper presents both “good” and “bad” results obtained during speciation analysis of thallium in plant tissues of a hyperaccumulator of this metal. The object was white mustard – Sinapis alba L. In this plant there were found traces of trivalent thallium. The crucial point of this study ...

Neptunium trichloride (NpCl3) of high purity was synthesized by the solid state reaction of neptunium nitride with cadmium chloride. Lattice parameters of hexagonal NpCl3 were determined from the powder X-ray diffraction pattern to be a = 0.7428 ± 0.0001 nm and c = 0.4262 ± 0.0003 nm, which fa...

Oxidative doping of thin π-conjugated polymer films using acetonitrile solutions of gold trichloride yields electronically conductive polymers (15 Ω−1 cm−1) containing the AuCl4− counter ion. Thin oxidized films containing counter ions are orders of magnitude more stable in ambient atmosphere ...

We report the synthesis of aryldiazonium tetrachloroaurate(III) salts [X-4-C6H4N≡N]AuCl4 (X = F, Cl, Br, I, CN, NO2) and their mild reduction to covalently functionalized nanoparticles. The synthesis of the salts was carried out by the oxidation of anilines, dissolved in HCl, using sodium nitri...

Tellurated alkylamine derivatives 4-CH3OC6H4Te(CH2)2NH3+Cl-(1), 4-CH3OC6H4Te(Cl2)(CH2)3NH3+Cl-(2),Cl2Te((CH2)2NH3+Cl-)2(3) and Cl2Te((CH2)3NH3+Cl-)2(4) have been synthesized by reacting appropriate organic halides with the nucleophile 4-CH3OC6H4Te− or Te2− generated in situ by borohydride reduct...

Crystal structure of (NH4)2(SO4)0.73(SeO4)0.27Te(OH)6 (NSSeTe) crystallizes in the monoclinic P21/c space group. It was analyzed at room temperature using X-ray diffractometer data. The unit cell parameters are a = 13.7340(2) Å, b = 6.6583(1) Å, c = 11.4582(2) Å, β = 106.8270(6)°, Z = 2, V = 1...

A novel cellulose (Cell) derivative, sodium-tellurato (Cell-TeO(OH)4(ONa)/Cell-Cl), has been synthesized from the reaction of 6-chloro-6-deoxycellulose (Cell-Cl) with telluric acid in the presence of sodium hydroxide. The subsequent reaction of this polymeric material with chromium(III) in aqueo...

At room temperature the rubidium ammonium sulfate tellurate salt Rb1.12(NH4)0.88SO4·Te(OH)6 (RbNST) has been prepared using the reaction of the rubidium sulfate, ammonium sulfate and telluric acid. Its structure has been determined from single crystal using neutron diffraction data. The RbNST c...

The molecular structure of decamethyl cyclopentasilane has been determined in the gas phase at a nozzle temperature of 85°C. The geometrical parameters obtained from least squares refinements are: r(SiSi) = 2.358(3) Å, r(Si1bC) = 1.898(2) Å, q=0.68(4)Å,

Pyrrole β-amides are useful building blocks for the preparation of novel molecular architectures that can be used in supramolecular chemistry and sensor development. Under basic conditions, pyrrole β-amides with an α-aldehyde produce different condensation products when reacted with pyrrolino...

The aim of this study was to evaluate the in vitro skin phototoxicity of cosmetic formulations containing photounstable and photostable UV-filters and vitamin A palmitate, assessed by two in vitro techniques: 3T3 Neutral Red Uptake Phototoxicity Test and Human 3-D Skin Model In Vitro Phototoxici...

Biocatalytic synthesis of ethylhexyl palmitate and ethylhexyl stearate as natural alternatives of cyclomethicone has been studied. In this work the esters have been obtained with two commercial enzymes: Novozym®435 and Novozym®40086 in a “solvent free” system. Operational conditions have been ...

The 2-ethylhexyl esters of fatty acids were synthesized by immobilized lipase from Candida sp. 99–125. The reuse stability of immobilized lipase was at least four batches. The conditions of enzymatic synthesis of 2-ethylhexyl palmitate were optimized. In the system of petroleum ether, 10% (w/w)...

The aim of this study was to improve intestinal mucus permeation of a peptide antibiotic via incorporation into papain-palmitate–modified self-emulsifying drug delivery systems (SEDDS) as nanocarrier. Vancomycin as a peptide antibiotic was lipidized by hydrophobic ion pair formation using sodiu...

A new immobilized lipase membrane reactor was studied for synthesis of 2-ethylhexyl palmitate. The lipase from Candida sp. 99–125 was immobilized on surfactant modified cotton membrane (130 IU/cm2). The conditions of enzymatic synthesis of 2-ethylhexyl palmitate were optimized and the optimized...

About 12 glycosides prepared through amyloglucosidase catalysis and 23 amino acyl esters of carbohydrates prepared through lipase catalysis in organic solvents showed angiotensin converting enzyme (ACE) inhibition activity. Both amino acyl esters of carbohydrates and glycosides exhibited IC50 va...

Within the United Kingdom, there is evidence that faith-based affiliations, ideas, actors and organisations play a role in public health (PH) that has been neither properly recognised nor integrated into mainstream health systems (November, 2014). Discourses on faith and improving health outcome...

Kinetic resolution of 6-acetyloxy-2H-pyran-3(6H)-one (1) is achieved by immobilized lipase PS on Hyflo Super Cell in organic solvents. Transesterification in hexane/n-butanol yields enantiomerically pure R-(−)-6-acetyloxy-2H-pyran-3(6H)-one, whereas esterification of 6-hydroxy-2H-pyran-3(6H)-one...