RESUMEN Desde tiempos remotos la plata coloidal ha sido utilizado principalmente para la desinfección del agua, como productos medicinales, entre otros; sin embargo, su eficiencia está en función al tamaño de la partícula metálica con la cual se da la interacción. En el caso de esta investigación se diseñó y elaboró filtros de arcilla con agregado de partículas de plata a tamaño micrométrico (plata coloidal comercial) y nanopartículas de plata (NP Ag), este último sintetizado mediante el método de química verde (biosíntesis) a partir del reductor obtenido de residuos de la producción vinícola. Como caso puntual de estudio, se ha considerado investigar la muestra de agua proveniente del afluente hídrico del Río Moche, ubicado en la Provincia de Trujillo, La Libertad – Perú, el mismo que cuenta con elevado contenido de contaminación microbiológica. Para la evalu...

Tomatoisanimportantcropduetoitsnutritionalcontributionsandorganolepticproperties, which make it an appetizing vegetable around the world. In its sowing, the use of seed is the most accessible propagation mechanism for farmers. However, the induction to germination and emergence is often limited in the absence of stimulants that promote the development and growth of the seedling, added to the interference of infectious agents that notoriously reduce the vitality and viability of the seed. Given this, it was proposed as a research objective to determine the effect of zinc oxide nanoparticles (ZnO NPs) mediated by a green route on the germinative characteristics of Lycopersicon esculentum Mill. 1768 “tomato”. The experimental phase consisted of the synthesis of ZnO NPs and its subsequent characterization. After its synthesis, its inoculation was conducted during the germination of seeds...

RESUMEN En el sector agroindustrial la materia prima es sometida a procesos de transformación para otorgarle un valor agregado, para ello se implementa diversas metodologías las cuales facilitan sus consumos, pero los residuos vinícolas por el contrario generan una de las principales problemáticas ambientales. Esta investigación adopta el estudio de la influencia del tiempo de reposo del extracto en solvente alcohólico (96%) de residuos provenientes de la producción vinícola, evaluándose la concentración de los compuestos fenólicos por alrededor de 114 días (un total de seis datos) y a su vez se sintetizaron nanopartículas de plata (NP Ag) por el método de química verde (biosíntesis) evaluándose también el potencial reductor del extracto respecto del precursor AgNO3 para la formación de NP Ag. La evaluación del extracto fue mediante la cuantificación del contenido de...

ABSTRACT The objective of the study was to evaluate diverse and known types of heat transfer fluids (water, oil and glycerin) commonly used in solar thermal systems, in this work denoted as base fluids, with respect to them, but with the addition of biosynthesized metal nanoparticles. It was considered a prototype of solar heating systems by thermosiphon in the application-experimental phase assisted by halogen light (with wavelengths ranging from deep infrared to violet). The process of biosynthesis or green synthesis of silver nanoparticles (NP Ag) was from the precursor of silver nitrate (AgNO3) and using as a reducer the alcoholic extract from agroindustrial residues of the wine production, obtaining colloids with high monodispersity and with sizes between 30 and 40 nm. (spherical geometry). The results suggest a greater increase in heat absorption capacity when biosynthesized silver...

“The potential for the application of metal-containing nanomaterials at the nanoscale promotes the opportunity to search for new methods for their elaboration, with special attention to those sustainable methods. In response to these challenges, we have investigated a new method for green synthesis of cuprous oxide nanoparticles (Cu2O NPs) using Myrciaria dubia juice as an organic reductant and, comparing it with chemical synthesis, evaluating in both cases the influence of the volume of the organic (juice) and chemical (ascorbic acid) reductants, for which a large number of techniques such as spectrophotometry, EDX spectrometry, TEM, SEM, DLS, FTIR spectroscopy have been used. Likewise, the nanomaterial with better morphological characteristics, stability, and size ho- mogeneity has been applied in the functionalization of textiles by means of in situ and post-synthesis impreg- nation...

The potential for the application of metal-containing nanomaterials at the nanoscale promotes the opportunity to search for new methods for their elaboration, with special attention to those sustainable methods. In response to these challenges, we have investigated a new method for green synthesis of cuprous oxide nanoparticles (Cu2O NPs) using Myrciaria dubia juice as an organic reductant and, comparing it with chemical synthesis, evaluating in both cases the influence of the volume of the organic (juice) and chemical (ascorbic acid) reductants, for which a large number of techniques such as spectrophotometry, EDX spectrometry, TEM, SEM, DLS, FTIR spectroscopy have been used. Likewise, the nanomaterial with better morphological characteristics, stability, and size homogeneity has been applied in the functionalization of textiles by means of in situ and post-synthesis impregnation method...

La investigación aborda la nanofertilización sostenible y sus impactos en el proceso de germinación de las semillas de quinua. El estudio se centra en el uso de nanopartículas de plata producidas mediante síntesis verde, destacando la importancia de los métodos ecológicos en la nanotecnología agrícola. A través de evaluaciones detalladas y análisis estadísticos, examinamos cómo estas nanopartículas afectan el crecimiento inicial de las semillas de quinua. Los resultados ofrecen información esencial sobre la eficacia de la nanofertilización ecológica para promover el desarrollo de la germinación de este cultivo clave. Este estudio surge como una valiosa contribución a la vanguardia de la nanotecnología agrícola, destacando su enfoque directo en la búsqueda activa de soluciones sostenibles para optimizar la productividad agrícola. Al profundizar en las ventajas intr�...

RESUMEN El objetivo del estudio fue evaluar el efecto en la estabilidad de las nanopartículas de plata sintetizadas por ruta química, como función de la variación del tiempo de exposición de la intensidad luminosa. Se evaluaron por espectrofotometría UV-Vis dos casos, el primero para solución coloidal, el cual mostró tener su pico de absorbancia en 434 nm, típico en nanopartículas de plata con morfología esférica; en un segundo caso para solución coloidal bajo exposición de intensidad luminosa constante (4409 lux) con tiempos que van desde 15 horas hasta 48 horas. Los resultados sugieren el incremento del diámetro de las nanoesferas en función al incremento del tiempo de exposición luminosa, así como un aumento de la absorbancia, lo que indica una posible reacción incompleta y una mayor producción.

RESUMEN El objetivo del estudio fue evaluar la influencia del tipo de solvente (alcohol comercial 96% y etanol absoluto) y pH (1.7, 3.5 y 5.5) en el proceso de extracción de compuestos fenólicos presentes en los residuos de la producción vinícola para aplicarlos como agente reductor del precursor nitrato de plata (AgNO3) en la síntesis verde de nanopartículas de plata (NP Ag). Los coloides de plata obtenidos fueron evaluados inicialmente por espectrofotometría UV-Vis, el cual determinó en un primer plano la presencia de coloides con alta producción de nanopartículas en los casos de alcohol comercial 96% y etanol ambos con pH= 3.5, con valores de absorbancia en 2.21 u.a. / 425.9 nm. y 2.8 u.a. / 431.8 nm. respectivamente; también se pudo visualizar una mediana producción con ambos tipos de disolventes, pero con pH=5.5, siendo los resultados 1.91 u.a. / 424.6 nm. para alcohol c...

In this research work has been synthesized and characterized by chemical route monometallic and bimetallic nanoparticles Core / Shell (Au / Ag), using two-step method involving the preparation of a solution of nuclei formed by gold nanospheres and its union with the armor formed by silver nanospheres; to this, the final size of the nanostructure, intimately dependent kernel size for that matter studied and experimentally examined the influence of parameter variation in the synthesis process._x000D_ It basically studied the influence of synthesis parameters on the gold nucleus, then it choose the best conditions and make the coating and produce silver bimetallic nanostructures. Variations were such as: Method of synthesis of the nanosphere, temperature stabilizing cetyltrimethylammonium bromide (CTAB) 65, 75, 85 and 95 °C, precursor Origin of chloroauric acid (HAuCl4) Stabilizer Type hom...

Tourism contributes 10% to global gross domestic product (GDP), yet it generates 5% of all anthropogenic CO2, while 50 to 60% of carbon emissions are indirectly related to the sector. High levels of poverty afflict rural areas in developing countries, and sustainable tourism based on renewable energy is an ideal approach to generate local development. Our objectives are thus to gauge sustainable tourism’s influence on local development in the community of La Florida, Huaral, Peru and to evaluate the potential of renewable energy (solar and wind power) to propose an eco-efficient business alternative. A non-experimental, quantitative approach was used, in which 265 local residents completed a survey to ascertain their perspectives on the proposal. Moreover, the potential for solar and wind energy was measured to identify sustainable alternatives that residents might incorporate into loc...

The green synthesis of metal oxide nanoparticles is presented as an excellent sustainable alternative for achieving nanostructures, with potential applications. This research provides important information regarding the influence of the type of solvent used in extracting organic reducing agents from E.globulus on the FeO NPs green synthesis protocol. A broad approach to characterization is presented, where UV-vis spectrophotometry suggests the presence of this type of nanoparticulate material. Likewise, the reduction mechanism was evaluated by FT-IR and the magnetic properties were evaluated by PPSM. In addition, characterizations were linked via elemental analysis (EDX), crystallographic characterization (XRD), electron microscopy (SEM/STEM), and Z potential to evaluate colloidal stability. The results show the influence of the type of solvent used for the extraction of organic reduci...

Tourism contributes 10% to global gross domestic product (GDP), yet it generates 5% of all anthropogenic CO2 , while 50 to 60% of carbon emissions are indirectly related to the sector. High levels of poverty afflict rural areas in developing countries, and sustainable tourism based on renewable energy is an ideal approach to generate local development. Our objectives are thus to gauge sustainable tourism’s influence on local development in the community of La Florida, Huaral, Peru and to evaluate the potential of renewable energy (solar and wind power) to propose an eco-efficient business alternative. A non-experimental, quantitative approach was used, in which 265 local residents completed a survey to ascertain their perspectives on the proposal. Moreover, the potential for solar and wind energy was measured to identify sustainable alternatives that residents might incorporate into lo...