The skin is constantly exposed to various environmental stresses, in particular to the damage caused by pollution and ultraviolet radiation (UV), and as a consequence, the horny extract can be negatively impacted by the harmful influence of some of its surface components. The mechanisms involved in the degradation processes promoted by UV radiation are driven by the direct absorption of radiation via cellular chromophores, the formation of excited states and the consequent chemical reactions, or even by the photosensitization mechanisms, in which UV light is absorbed by the sensitizers that are excited and their reactions promote the formation of reactive oxygen species (ROS). The mechanisms of polluting agents are not yet fully understood, however, they indicate that one of the main mechanisms involved is oxidative stress by lipid peroxidation, with the ability to promote damage to the composition of sebum, the quality of the stratum corneum and also, promote aging skin. Recent studies demonstrate the potential of antioxidant agents, with an emphasis on products of natural origin, which try to promote the maintenance of the physiological balance of the skin.

The objectives of the present study were to evaluate the macronutrients of the peel and the pulp, as well as the phytochemical screening (PS), determines the total polyphenolic compounds (TPC), total flavonoid content (TFC) and antioxidant activity (AA) of the extracts of the pell and pulp of Oenocarpus bataua Mart. The fruits of Puerto Maldonado city were classified taxonomically. The macronutrients of the peel and pulp were determined by proximate analysis. Hydroalcoholic extract of the peel (PEE) and pulp (PUE) was prepared with ethanol: water (70: 30, v: v) separately. It was detected mainly carbohydrates and polyphenols, flavonoids, antioxidante activity through the qualitative test of PS. For PEE and PUE, the results were: TPC of 60.60±0.30 and 40.77±0.90mg GAE/mL; TFC of 20.67±0.26 and 13.05±0.27mg CE/mL respectively. For skin and pulp AA by the ABTS technique reported values of 713.86±16.24 and 583.29±15.91μmol/100g TEAC and 29.64±0.68 and 45.82±1.23 IC50 (μg/mL) respectively. Also DPPH radical technique was used. Concluding that the peel presented greater antioxidant capacity than the pulp and this would be due to the polyphenols. In addition, the fat and protein content in the pulp was significant.

Efecto De La Humedad Relativa Y La Temperatura En La Aplicacion De Insecticidas Organofosforados Y Carbamatos E Impacto En La Colinesterasa De Agro Productores De Tomate (Solanum Lycopersicum L.) En La Localidad De “San Luis, Chimborazo, Ecuador