El propósito del presente trabajo de investigación, fue implementar un sistema de monitoreo y control de la tasa respiratoria, en palta variedad Hass y tuna biotipo (PT1-167) el método consistió en mantener un flujo constante y conocido de aire sobre la muestra, de peso previamente determinado y llevar al equilibrio con accesorios purificadores de gas (filtro de partículas, trampa de agua y filtro hidrofóbico), el CO2 liberado por los frutos en la cámara de respiración es acarreado por el flujo de aire, el cual pasa por la cámara de muestreo del sensor doble infrarrojo (NDIR). La palta variedad Hass proveniente de Huanta Ayacucho a 2380 m.s.n.m. se cosechó con 9.26% de aceite (madurez fisiológica), a los 17 días de monitoreo y control respiratorio experimentó el clímax climatérico, este rápido incremento en la respiración estuvo asociado a la maduración con un coeficien...

The research aims to design, build and evaluate a machine that has the ability to release cellulose from the rest of residual biomass and thus provide added value to the pineapple bark fiber. A theoretical study was carried out on the raw material and technology involved in obtaining cellulosic fiber, where it is potential material for the textile industry, tanning, paper pulp, etc. Therefore, the components of the prototype were designed, so it is necessary to analyze and determine the efforts to which they are subjected when the mechanical system (in which they are integrated) is under certain operating conditions. The characteristic of the design is that it has (02) very differentiated bodies: mobile and static, it is accurate in the load of the raw material and is clearly for batch type jobs and especially is unarmable in its components for maintenance

La industria del cuero enfrenta desafíos por prácticas contaminantes, ya que el curtido tradicional utiliza químicos tóxicos y genera residuos peligrosos. El cuero biológico basado en celulosa bacteriana (CB) surge como solución prometedora para mitigar estos impactos. El objetivo del estudio fue evaluar el efecto del medio y condiciones de cultivo en el rendimiento y calidad de CB para obtener cuero biológico, empleando un consorcio bacteriano de té de kombucha en la fermentación. Se realizaron dos ensayos utilizando el Diseño Óptimo de Experimento. Se evaluó el rendimiento de CB en 10 tratamientos con tres fuentes de carbono: sacarosa (SA), mucílago de cacao (MC) y suero de leche en polvo (SL). También se analizaron la resistencia a la tracción (RT) y el porcentaje de elongación (PE) en 7 tratamientos con tres agentes curtientes: sulfato de cromo (SC), tensotan GL-50 (T...

La producción de espirulina, un tipo de cianobacteria de alto valor nutricional y comercial, es de creciente interés en biotecnología y agricultura sostenible. Sin embargo, su eficiencia a gran escala enfrenta desafíos, especialmente en la optimización del rendimiento. Por ende, el objetivo del estudio fue evaluar el efecto de la velocidad de agitación (VA), tiempo de agitación (TA), y altura del agua (H) en tres niveles (bajo, medio y alto) para la optimización en la producción de espirulina en un biorreactor raceway pond. La metodología incluyó un diseño de cribado definitivo (DCD) con 13 tratamientos, donde se midieron los efectos de estas variables operativas sobre la concentración de espirulina en peso seco (g/L). El análisis estadístico reveló que el modelo cuadrático fue capaz de explicar satisfactoriamente (p=0,002 y R2 = 92,53 %). Aunque el análisis de varianza...

In response to the growing interest in non-dairy functional foods, this study aimed to develop a symbiotic beverage based on water kefir fermented with Andean plant-based substrates: black mashua, yacon, and spirulina. An extreme vertices mixture design was applied, maintaining constant levels of 12 % sucrose and 15 % kefir grains, to evaluate eight formulations. The variables analyzed included physicochemical parameters (pH, °Brix, titratable acidity), microbiological indicators (lactic acid bacteria count), and sensory attributes (odor, color, and taste). The results showed a significant decrease in pH (from 6.26 to 2.98) and °Brix (from 15 to 7.0), along with an increase in titratable acidity (up to 1.10 %) and lactic acid bacteria counts exceeding 8 log₁₀ CFU/mL on day 7. Sensory evaluation revealed high acceptability in treatments containing black mashua (odor: 4.6; taste: 4.8...

The article presents the results obtained in the structural, physical and chemical characterization of the stubble fiber of the pineapple harvest (Ananas Comosus) Golden as an alternative to elaborate paper. The biometric properties of the fibers were determined (length and diameter, wall thickness and lumen diameter), to later obtain the pulp quality indexes for paper, as well as the percentages of cellulose, Holocellulose and lignin, according to the TAPPI Standards for each component and the Jayme-Wise method. This study was made with the purpose of having information for its later use in the pulp and paper industry. Pineapple stubble samples were extracted from the population center of Omaya, Pichari in the Valley of the Apurimac, Ene and Mantaro Rivers (VRAEM) - Peru. The results indicate that they present biometric measurements of: Fiber length: 1105 µm, Wall thickness: 2,75 µm, ...

Water intended for human consumption faces increasing contamination by arsenic, a toxic metalloid naturally present or derived from anthropogenic activities, whose prolonged exposure poses a serious public health risk. In response to this problem, the study aimed to evaluate the effectiveness of natural red clay as an ecological adsorbent for arsenic removal from water. A Plackett–Burman experimental design was applied to identify the significant variables, and the Response Surface Methodology (RSM) was used to optimize the process. Six factors were analyzed, among which the Pareto analysis identified firing temperature, Fe₂O₃ content, and red clay percentage as the most influential factors, with a significance level of α = 0.05 and a determination coefficient of R² = 0.74. Subsequently, optimization through RSM achieved a maximum arsenic removal of 85.1% under conditions of 90% ...

The functional compounds present in food are essential to prevent certain types of cancer, so it is important to know how they vary in the food during storage. The study was conducted in the Puno region in 2019; the objective of the trial was to evaluate the behavior of functional compounds in two accessions of Isaño: Yana añu (purple-dark color) and Yellow pumpkin with purple eyes during storage at natural conditions 13 ºC and 65 % of relative humidity. The method used to determine the polyphenols was the one described by Folin-Ciocalteu; ABTS to determine the CAOX and visual titration with 2-6 Dichlorophenolindophenol to quantify the vitamin C content. The results show that the Yana añu accession has the highest polyphenol content and antioxidant capacity compared to the yellow pumpkin with purple eyes accession, being these values for polyphenols 24.90 and 15.89 mg AGE.g-1, which ...

Currently, methods based on neuroscience and technology (neurotechnology) are used to understand how people process different marketing stimuli. These methods could be used to generate adequate public health policies, but it is being used by agri-food companies to improve their marketing strategies and encourage the consumption of fast food, food intake high in sugar, salt, and saturated and trans fats, being the origin of non-communicable diseases such as obesity, heart attacks, cancer, hypertension and diabetes, as well as nutritional deficiencies, which constitute a great danger to people and public health. Neuroscientists have been using different technologies (functional magnetic resonance imaging (fMRI), electroencephalography (EEG), magnetoencephalography (MEG), positron emission tomography (PET), eye tracking, facial coding, galvanic skin response (GSR) or electrodermal activity ...

Currently, methods based on neuroscience and technology (neurotechnology) are used to understand how people process different marketing stimuli. These methods could be used to generate adequate public health policies, but it is being used by agri-food companies to improve their marketing strategies and encourage the consumption of fast food, food intake high in sugar, salt, and saturated and trans fats, being the origin of non-communicable diseases such as obesity, heart attacks, cancer, hypertension and diabetes, as well as nutritional deficiencies, which constitute a great danger to people and public health. Neuroscientists have been using different technologies (functional magnetic resonance imaging (fMRI), electroencephalography (EEG), magnetoencephalography (MEG), positron emission tomography (PET), eye tracking, facial coding, galvanic skin response (GSR) or electrodermal activity ...

El aumento en los índices de obesidad refleja el efecto de las políticas públicas y la forma como se comercializan los productos alimenticios, si esta situación no se revierte, los casos de enfermedades no trasmisibles seguirán en aumento. El objetivo de la investigación fue estudiar la percepción de los diseños de advertencia de cuatro países (Ecuador, Chile, Brasil y Perú) y su influencia en la intención de compra de productos envasados en escolares. El estudio consistió en tres etapas:(a) primero se utilizó un cuestionario para conocer la frecuencia de consumo de productos envasados, (b) luego se diseñaron etiquetas con los productos con mayor frecuencia de consumo, y (c) finalmente se utilizó la técnica instrumental de seguimiento ocular para conocer la percepción visual de las etiquetas, teniendo como región de interés el diseño de advertencia frontal de los cuat...