Lipase enzyme from Aspergillus oryzae (EC 3.1.1.3) was immobilized onto a micro porous polymeric matrix which contains aldehyde functional groups and methyl esters of long chain fatty acids (biodiesel) were synthesized by transesterification of crude canola oil using immobilized lipase. Micro po...

Oleic acid, cis-9-octadecenoic acid, is the major fatty acid in mammals. Its oxide, cis-9,10-epoxyoctadecanoic acid (cis-EODA), has been identified in blood and urine of humans, its origin is, however, still unknown. Lipid peroxidation and enzyme-catalyzed epoxidation of oleic acid are two possi...

A growing number of researchers are focusing their attention on the possibility that thyroid hormone metabolites, particularly 3,5-diiodothyronine (T2), may actively regulate energy metabolism at the cellular, rather than the nuclear, level. Due to their biochemical features, mitochondria have b...

The study presents investigations on the basic photophysical characteristics of seven polymerizable triazine–stilbene fluorescent brighteners in aqueous and ethanol solutions and their photochemical trans–cis isomerisation. It was established that the type of substituents in triazine ring does...

Reaction of [Cu(PR3)Cl]4 [where PR3 = tri-p-tolylphosphine (tptp), or triphenylphosphine (tpp)] with several heterocyclic thiones (L) yields binuclear complexes of the general formula [Cu(PR3)(L)Cl]2 [L = 1,3-thiazolidine-2-thione (tzdtH), benz-1,3- thiazoline-2-thione (bztztH), dithiouracil (dt...

The photochemical reduction of uranyl ions by triphenylphosphine, tri-p-tolylphosphine, triphenylarsine and tri-p-tolylarsine in a dry acetone medium in the presence of trimethylacetic acid, using radiation in the visible region (λ > 365 nm), was investigated. The electron spin resonance and el...

Molecules of C12H4F8N2 crystallize in the orthorhombic space group P212121 with cell constants a=9.200(1), b=10.896(1), c=23.178(3)Å and V=2323.4(5)Å3. There are two molecules in the asymmetric unit which have D2 symmetry. However these two molecules have C2 symmetry in central C–C bonds, sep...

1H and 19F MAS, 13C and 15N CP/MAS NMR and liquid phase NMR spectra of 4,4′-diaminooctafluorobiphenyl (DAOFB) have been reported for the first time. 1H, 13C and 15N NMR chemical shifts of DAOFB (C12H4F8N2) have been calculated by means of the Hartree–Fock (HF) and Becke-3-Lee-Yang-Parr (B3LYP)...

Natural laccase-mediator systems have been well recognized as an eco-friendly and energy-saving approach in environmental remediation, whose further application is however limited by the high cost of natural mediators and relatively long treatment time span. This study evaluated the water extrac...

Understanding the mechanisms underlying cancer cell survival is critical toward advancing drug discovery efforts in this field. Supplemental vitamins have been proposed to play a role in cancer cell metabolism because the increased supply of nutrients is thought to provide cofactors supporting t...

The solubility curves for the (carbon dioxide + 2-phenoxyethyl acrylate) and (carbon dioxide + 2-phenoxyethyl methacrylate) systems were determined by a static view cell apparatus at five temperatures (313.2, 333.2, 353.2, 373.2, and 393.2) K as well as pressures up to 31.43 MPa. Two {carbon dio...

Titania modified by tungstophosphoric (TPA) and tungstosilicic (TSA) acid (30% w/w) were synthesized by the sol-gel method, using urea as low cost pore-forming agent and annealing at 500 °C for 2 h (TiO2/TPA and TiO2/TSA respectively). The obtained materials were characterized by 31P, 29Si, 1H ...

This study investigated the effects of different doses of 17-β-estradiol (E2) in Rhamdia quelen. Groups of males exposed to different doses of E2 (0.1 mg kg− 1, 1 mg kg− 1 and 10 mg kg− 1) were compared with non-exposed male and female fish groups. Among the considered biomarkers, no significan...

The estrogen receptors (ERs)-dependent effects of Zearalenone (ZEA) on structure and function of the testis as well as sperm parameters were compared with 17-β estradiol as endogenous substance. For this purpose, 30 mature male rats were assigned into five groups as; control (appropriate volume...

A method was developed for the simultaneous determination of four kinds of estrogens (hexoestrol, diethylstilbestrol, estrone, and 17-beta-estradiol) in feed by gas chromatography-mass spectrometry (GC-MS). After the sample was extracted by ethyl ether and cleaned-up on HLB phase extraction colu...

The estrogens 17-β-estradiol (E2) and 17-α-ethinylestradiol (EE2) are reported as highly endocrine-disrupting agents, being recently included in an EU watch list regarding emerging aquatic pollutants. Therefore, the monitoring of these chemicals in the different environmental compartments assu...

β-Estradiol residue in water is very dangerous and unacceptable due to its endocrine disturbing and carcinogenetic nature. Therefore, fast, effective and eco-friendly removal method of β-estradiol is described from water. The maximum removal of β-estradiol from water was 82% with 600 μg L− 1...

Four pregnanes: 1-methoxy-pregnan-17(R)-1,4-dien-3,16-dione (1), 1-methoxy-pregnan-17(S)-1,4-dien-3,16-dione (2), 2,3-seco-pregnan-17(S)-2,3-dioic acid-16-oxo-dimethyl ester (4), 2α,3α,16α-trihydroxy-5α-pregnan-17(R)-20-yl acetate (7), three androstanes: 1-methoxy-androstan-1,4-dien-3,16-dio...

IntroductionLipophilic delocalized cations accumulate in tumor cell mitochondria due to their higher transmembrane potential. In this work, this strategy was adopted for the development of 99mTc tumor-targeted imaging agents.

A simple and convenient method for the synthesis of nitriles by dehydration of aldoximes has been developed using triphenylphosphine dibromide in acetonitrile at room temperature. A variety of aromatic and heteroaromatic aldoximes are converted into the corresponding nitriles in high yields.