The essential oil from Conyza bonariensis (Asteraceae) aerial parts (CBEO) was extracted by hydrodistillation in a Clevenger-type apparatus and characterized gas chromatography–mass spectrometry. antitumor potential evaluated against human tumor cell lines (melanoma, cervical, colorectal, leukemias), as well non-tumor keratinocyte using the MTT assay. effect of CBEO on production Reactive Oxyge...

Cry1C, Cry1F and Cry1Ab are insecticidal proteins from Bacillus thuringiensis (Bt) which expressed in transgenic crops. Given the entry of these into aquatic environments, it is relevant to evaluate their impacts on organisms. In this work, we sought effects zebrafish embryos larvae a predicted worst-case scenario concentration (set 1.1 mg/L). For that, coupled traditional toxicity approach (th...

The aim of the study is to perform a fast and efficient toxicity test that demonstrates safety or levels in embryonic development zebrafish exposed different doses curcumin. Embryotoxicity tests were performed according OECD guideline. A standard dose 100 mg/kg curcumin per embryo weight was determined. stock solution dissolved dimethylsulfoxide then used serial dilution dechlorinated water ide...

In the USSR the study of pesticide toxicity and toxicodynamics began in 1932. All the compounds used are assessed; hygienic standards of acceptable concentrations in foods, working area air, atmospheric air, and water are calculated. The maximum acceptable daily intake of chemicals from all the media is tabulated and these data are examined for hygienic standardization. In the past toxicologist...