The article provides information on the development of a new reference material (RM) for composition solution six priority phthalates (dimethyl phthalate, diethyl di(n-butyl) benzyl butyl bis(2-ethylhexyl) di(n-octyl) phthalate) in methanol provided with metrological traceability to GET 208-2019 (GET 208). procedure preparation and certification RMs is shown, including estimation homogeneity st...

Phthalate esters (PEs) are a group of widely used commercial chemicals consisting of many different congeners. Concentrations of di(2-ethylhexyl) phthalate ester in the parts per million range have been observed in sediments from locations in North America and Europe. However, sediment and biota concentrations of other widely used PEs (i.e., dibutyl phthalate, diisononyl phthalate, and diisodec...

The B-strain of Bemisia tabaci Gennadius is a key pest of several crops and chemical control is the main control method used by growers, although reduction in efficacy due to insecticide resistance has already been reported. The aim of this work was to investigate the insecticidal effect of an array of synthetic sucrose esters with the aliphatic and aromatic groups on whitefly adults. Sucrose b...

Di-n-butyl phthalate (DBP) and its active metabolite, monobutyl phthalate (MBP) are the most common endocrine disrupting chemicals. Many studies indicate that high-doses of DBP and/or MBP exhibit toxicity on testicular function, however, little attention have been paid to the effects of low levels of DBP/MBP on steroidogenesis. As we all know, the steroidogenic acute regulatory protein (StAR) i...

There is convincing evidence in the literature that most of the adverse biological effects of phthalate diesters are actually effects of metabolites rather than of the parent compounds. If so, the dramatic species differences in endpoint metabolic profiles make it essential that metabolism of phthalates be understood in detail, including the factors that may alter the metabolism. A metabolic pa...

BACKGROUND Several species of the genus Launaea are used in folk medicine such as in bitter stomachic, skin diseases, and reported to have antitumor, insecticide, and cytotoxic activities. The antimicrobial activities of coumarin constituents and the neuropharmacological properties have been investigated as well. In this study, the chemical composition of essential oils from Launaea resedifolia...