Browsing by Author "Logroño Veloz, Mayra Alexandra"

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    Desarrollo de una membrana a base de fibra de cabuya (furcraea andina) recubierta con nanopartículas de plata y evaluación de su actividad antimicrobiana frente a Staphylococcus aureus y pyogenes
    (Universidad Técnica de Ambato. Facultad de Ingeniería en Sistemas, Electrónica e Industrial. Maestría en Química, 2022) Logroño Veloz, Mayra Alexandra; Silva Yumi, Jorge Efrén
    The advancement of nanotechnology during the last decades has allowed great progress in various fields, including health sciences and the application of green chemistry. The objective of the present work was to synthesize and characterize silver nanoparticles in solution and supported on a plant membrane of cabuya (Furcraea andina), in turn, to measure their antimicrobial activity. In situ synthesis was carried out by wet chemistry method using common and King mandarin peel extracts as a reducing agent, and the levels of concentration, temperature, and immersion times of the cabuya fibers were evaluated. The colloids were characterized by UV-visible spectroscopy providing an average wavelength range between 430 to 450 nm. The optimal concentration of the precursor reagent was 0.0025 M Ag NO3 and as a reducing agent, 5% of the aqueous extract of mandarin peel of the common variety or 3% of the King variety. The characterization of the surface was carried out by means of SEM, EDX and FT-IR microscopy. The process allowed obtaining a material with silver nanoparticles that exhibit antimicrobial activity with medium sensitivity against Staphylococcus aureus and pyogenes.