Lead is one of the main heavy metals that can cause adverse effects on human health and plant growth. Various plant species are used in lead-contaminated environments, finding variations in their response capacity in relation to their growth and development. In the present investigation, the effect of 4 concentrations of lead acetate (0, 400, 600 and 800 ppm) on the growth of L. maritima Desv. at 30, 60 and 90 days of cultivate under greenhouse conditions. For this, plants grown in perlite substrate, irrigated with nutrient solution and lead acetate, following a completely randomized experimental design. Growth was evaluated based on: root and stem length, leaf area, and number of branches with inflorescence. Lead acetate was found to cause a decrease in the growth parameters analyzed; observing the lowest values at the concentration of 800 ppm in the first 2 periods of time.

La responsabilidad social es uno de los pilares que refleja la esencia de una institución, cualquiera sea su naturaleza, tamaño o complejidad; hoy mejor que antes, se comprueba fácticamente que la responsabilidad social es una tarea compartida entre los diferentes roles sociales que forman parte en los distintos niveles organizacionales y sociales que configuran el sistema de actividad humana, para lograr su bienestar de una manera sostenible.

This research develops a microbicidal aqueous paint to prevent infections on high-touch surfaces. Based on the experimental tests, two chemical formulations were proposed consisting of an acrylic latex resin, silicone resin, titanium oxide, zinc omazide, copper oxide nanoparticles and additives. Th e results showed that the formulation 2 paint presented good homogenization, gloss and stability, its average drying time is 30 min, it has adequate metal coating thickness (49.2 μm) and viscosity (60 s in Ford No. 4 cup), according to the standards ASTM D 1186 01 and ASTM D 1200, respectively; Based on these characteristics, it is considered to be of acceptable quality. Th e bioassays carried out with bacteria of Staphylococcus aureus Rosenbach, 1884 and Escherichia coli (Escherich, 1885) by the incorporation method, showed that the two formulations have antifungal and antimicrobial properti...