Sunscreens reduce the occurrence risk of skin disorders such as sunburn, aging, and cancer through their ability to absorb, reflect, scatter ultraviolet (UV) radiation. This review provides an overview UV filters active ingredients sunscreen products, emphasizing classification structural characteristics. Their photostability, mechanism action radiation absorption, optical properties, regulator...

Two-dimensional (2D) graphitic carbon nitride materials have been drawing increasing attentions in energy conversion, environment protection and spintronic devices. Here, based on first-principles calculations, we demonstrate that the already-synthesized honeycomb lattice of s-triazines with a chemical formula of C6N6 (g-C6N6) has topologically nontrivial electronic states characterized by px,y...

Pesticides are substances often described as carcinogenic initiators for some neoplasms, such lympho-hematopoietic and breast cancer. As cancer of the digestive system, this relationship is still poorly explored requires more evidence. A systematic review with meta-analysis was conducted on association between pesticides system in PUBMED database. Of 567 papers found, 32 were approved qualitati...

Determining the accurate chemical structures of synthesized compounds is essential for biomedical studies and computer-assisted drug design. The unequivocal determination of N-adamantylation or N-arylation site(s) in nitrogen-rich heterocycles, characterized by a low density of hydrogen atoms, using NMR methods at natural isotopic abundance is difficult. In these compounds, the heterocyclic moi...

Commercially available solid-phase microextraction fibers used for isolation of polar analytes are based on the adsorption phenomenon. In consequence, typical limitations bonded with analytes displacement and matrix effects are very frequent. In the present study, alternative solution is described. Polycaprolactone (PCL) was used for the first time as sorbent to isolate polar organic compounds ...

We investigated a potential mechanism for the estrogenic properties of three chloro-s-triazine herbicides and six metabolites in vitro in several cell systems. We determined effects on human aromatase (CYP19), the enzyme that converts androgens to estrogens, in H295R (adrenocortical carcinoma), JEG-3 (placental choriocarcinoma), and MCF-7 (breast cancer) cells; we determined effects on estrogen...

Due to the use of pesticides during cotton production and/or textile storage, it is necessary assure and clothing safety in order improve protection human health. In this work, an efficient method was established for a multiresidue determination 33 covering several pesticide classes such as organochlorine, organophosphate, pyrethroides, triazines, etc., textiles by modified QuEChERS followed ga...