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1
artículo
Publicado 2012
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The aim of the present work was to optimize the sensorial and technological features of ice cream. The experimental work was performed in two stages: 1) optimization of lactose enzymatic hydrolysis, and 2) optimization of the process and product. For the first stage a complete factorial design was developed, optimized using both response surface and the steepest ascent method. In the second stage a mixture design was performed, combining the process variables. The product with the best sensorial acceptance, high yield and low cost was selected. The acceptance of the product was developed by an untrained taster’s panel. As a main result the sensorial and technological features of the final product were improved, establishing the optimum parameters for its elaboration.
2
artículo
Publicado 2012
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The aim of the present work was to optimize the sensorial and technological features of ice cream. The experimental work was performed in two stages: 1) optimization of lactose enzymatic hydrolysis, and 2) optimization of the process and product. For the first stage a complete factorial design was developed, optimized using both response surface and the steepest ascent method. In the second stage a mixture design was performed, combining the process variables. The product with the best sensorial acceptance, high yield and low cost was selected. The acceptance of the product was developed by an untrained taster’s panel. As a main result the sensorial and technological features of the final product were improved, establishing the optimum parameters for its elaboration.
3
artículo
Publicado 2025
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We evaluate the performance of an Omnivision OV5647 CMOS image sensor (5 Mp) for detecting radiation from Sr90 and Cs137 sources. Our experimental setup uses a Raspberry Pi 3 mini-computer for data acquisition, with image processing using Python and OpenCV libraries. We specify the necessary settings to convert a standard camera into a particle detector sensitive to electrons and photons, including a two-step background filtering procedure. In addition, we implement the first detailed Geant4 simulation that describes the layered geometry and material composition of a commercial CMOS sensor along with the radioactive sources. To enhance the simulation, we include an algorithm for charge diffusion and conversion of the energy deposited by electrons and photons into ADC counts. Our measurements are presented in terms of cluster size, the maximum ADC signal per cluster, and the number of clu...
4
artículo
Publicado 2021
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This study aims to design and validate a nutritional recipe for a snack made of Green Banana (Musa paradisiaca) Peel Flour (GBPF) and to assess the nutritional composition and microbiological quality of the flour. Banana peel, a food industry by-product, is a nutritious, low-cost material available for all year. Banana peel flower could be used as a functional ingredient due to its high fiber content and good functional properties. In general, university students have a deficient dietary fiber intake due to altered dietary patterns; thus, this study was focused on this population. The GBPFs were obtained from the peels of pre-climacteric bananas by fluidized bed (FDB) dryer, after which, microbiological, proximate, and dietary fiber analyses were applied. It was designed the nutritional recipe for the snack taking into account the energy and dietary fiber nutritional requirements of the ...
5
artículo
Publicado 2024
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The valorization and use of lignocellulosic biomass from food processing to obtain value-added products is crucial to improve sustainability and reduce waste management costs. This potential for cost reduction is a reason for optimism, as it allows agro-industrial waste to be transformed into valuable resources, contributing to the circular economy. This study focused on the compositional and structural characterization of eleven types of lignocellulosic biomass (LCB) to evaluate their potential in producing nanopolysaccharides and polyhydroxyalkanoates. Parameters such as humidity, ash, proteins, extractives, structural carbohydrates, and lignin were analyzed in passion fruit peels, artichoke bracts, asparagus peels, lemon peels, orange peels, avocado seed, potato peels, cassava peels, sugar cane bagasse, rice husk, and rice straw. The results showed that fruit peels and other waste had...
6
artículo
Publicado 2020
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In this paper, a three-dimensional numerical solution for the bending study of laminated composite doubly-curved shells is presented. The partial differential equations are solved analytically by the Navier summation for the midsurface variables; this method is only valid for shells with constant curvature where boundary conditions are considered simply supported. The partial differential equations present different coefficients, which depend on the thickness coordinates. A semi-analytical solution and the so-called Differential Quadrature Method are used to calculate an approximated derivative of a certain function by a weighted summation of the function evaluated in a certain grin domain. Each layer is discretized by a grid point distribution such as: Chebyshev-Gauss-Lobatto, Legendre, Ding and Uniform. As part of the formulation, the inter-laminar continuity conditions of displacement...
7
artículo
Publicado 2020
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El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.
8
tesis de grado
Publicado 2025
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El presente estudio analiza el efecto principalmente de la banca digital y las condiciones del sistema financiero sobre la inclusión financiera, utilizando información de 106 países para los años 2014, 2017 y 2021. Con base en indicadores del Global Findex, Financial Access Survey (IMF), World Development Indicators y la Unión Internacional de Telecomunicaciones se construye un índice de inclusión financiera y un índice de digitalización bancaria, incorporando variables de control como el Z-score bancario, la concentración bancaria, el ratio cost-to-income, el PIB per cápita, el margen neto de interés y la brecha de crédito. El modelo se estima mediante un Modelo de Respuesta Fraccional (FR) con errores agrupados por país, complementado con el enfoque de Función de Control (CF) para corregir posibles problemas de endogeneidad. Los resultados muestran que la digitalización...
9
tesis doctoral
Publicado 2023
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El presente trabajo consistió en la formulación de un material restaurador dental a base de nanopartículas de hidroxiapatita (HAp) obtenida de la cáscara de huevo de gallina. Para ello se utilizó el método de mecano-síntesis para la preparación de HAp usando como precursor de calcio a la cáscara de huevo, variando el tiempo de molienda y la temperatura de tratamiento térmico. Se utilizaron las técnicas de DRX, FTIR, MEB, EDS, SPOS y CRM para determinar cuáles fueron las condiciones óptimas de preparación, obteniendo que para 16 horas de molienda y 400 °C de tratamiento térmico la HAp resultante consistía en un material puro con tamaño nanométrico, inclusiones de carbonato y mayor tensión elástica interna. A la par, se realizaron simulaciones computacionales mediante cálculos ab-initio para obtener algunas propiedades físicas de manera teórica en dos tipos de HAp: ...
10
tesis de grado
Publicado 2009
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Thís research aíms to characterize the sedíments and suspended solíds leavíng the desanding to optimize the design of the sediments in the Special Project CHAVIMOCHIC Suspended solids without causing a number of drawbacks in the pressurized irrigation system, resulting in a reduction in the lifetime of the equipment and other elements of the system, resulting in negative effects on the cost of operation and production systems and crops. The settlers are a simple and economical solution for the removal of suspended /solids (sand, silt and el ay). May be designed to be the characteristics of the sediments such as size, shape, weight, speed and mineralogical composition offall. Sediment characterization was performed in the first and second phase of the Special Project CHA VIMOCHIC at the following stations: S. Desanding, S. The Agony, S. Cargo House, S. 10 E. Side Rinconada. As the mo...
11
tesis de grado
Publicado 2020
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Se evaluó el efecto bioprotector de tres consorcios de hongos micorrízicos arbusculares nativos en plantones de tres variedades de Coffea arabica L., propagados sexual y asexualmente frente al ataque de la roya amarilla (Hemileia vastatrix). La investigación fue desarrollada en Chirapa – Lamas, bajo condiciones de vivero y en el Laboratorio de Micorrizas del IIAP, Tarapoto - San Martín. Se usó el Diseño Completamente al Azar con arreglo factorial de 3A x 2B x 4C, siendo A: variedades de café (caturra, pache y nacional), B método de propagación (sexual y asexual) y C: consorcios de HMA nativos (de las provincias de Moyobamba, El Dorado y Huallaga) comparados con un testigo, resultando 24 tratamientos, 9 plantas/ tratamiento y 216 unidades experimentales. En el repique de las plántulas se inoculó con 1500 esporas de HMA nativos y un mes después fueron instalados en el vivero ...
12
tesis de grado
Publicado 2014
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El estudio se desarrolló en el bosque de colina baja de la cuenca del río Tahuamanu, distrito de Iberia, en la provincia de Tahuamanu, en la región de Madre de Dios, en un área de 3205,52 ha. El objetivo del estudio fue determinar la estructura horizontal y la valorización económica de las especies forestales comerciales que permita conocer la viabilidad económica de las mismas. El método estuvo en función a la clasificación de costos de manera que presente características comunes para realizar los cálculos y el análisis correspondientes. La composición florística estuvo representada por un total de 19 especies forestales comerciales, agrupadas en 11 familias botánicas. Las especies con mayor peso ecológico fueron Dypteryx odorata “Shihuahuaco” (54,02%), Brosimum alicastrum “Manchinga” (29,26%), Manilkara surinamensis “Quinilla” (28,76%), Amburana cearensis ...
13
tesis de grado
Universidad Nacional Agraria La Molina. Facultad de Industrias Alimentarias. Departamento Académico de Tecnología de Alimentos y Productos Agropecuarios
14
artículo
Publicado 2023
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The investigation constitutes an analysis of the management of hazardous solid waste during the hydrocarbon spill in Ventanilla. The method used is descriptive and comparative, consisting of the search, evaluation and analysis of the facts. Inadequate waste management was evidenced during the hydrocarbon clean-up work. After the accident occurred, the quantity and physical composition of the waste generated were not strictly accounted for, a waste hierarchy must be defined due to its dangerousness, prioritizing the separation of waste at the source of generation, and the prevention of secondary pollution. Contingency planning must incorporate handling and storage at the source: temporary storage with impermeable containers, transport through clearly defined and signposted accesses, and define final disposal in secure landfills. It is concluded that hazardous solid waste is the responsibi...
15
tesis de grado
Publicado 2017
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El látex natural del caucho es la fuente de materia prima de innumerables productos los cuales poseen un gran impacto en el desarrollo económico, industrial, social, ambiental. La calidad de tales productos está sometida a la composición inicial del látex fresco preservado y en especial la cantidad de hidrocarburo presente en él. Este trabajo de investigación, está basado en la preservación y caracterización fisicoquímica del látex natural de caucho “Hevea Brasilienses”, situado específicamente en el distrito de Chazuta en la Región San Martin. El trabajo se divide en tres fases: la primera es obtener los análisis fisicoquímicos del látex fresco sin preservante: contenido de sólidos totales (TSC), Contenido de caucho seco (DRC), material volátil (MV), cenizas y densidad relativa. En la segunda es ver cómo influye el preservante (amoniaco) a diferentes concentracio...
16
tesis de grado
Publicado 2022
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Nowadays, waste generation has increased to an alarming level and it is of major importance to treat them to minimize the risk that they represent both for the environment and for people's health. The focus of this research is directed at a type of waste that is not taken much into account, the waste from electrical and electronic equipment. Over the years, technology’s progress and the constant updates that arise from it have increased the waste generation to a great extent. Electrical and electronic devices are made up of a long list of materials, which with proper treatment can be recovered in the form of secondary raw material, but are also made up of some components, which are a very dangerous pollutant, for example the batteries. Therefore, it seeks to further investigate the recycling processes of these wastes and thereby recover the materials with which they are produced, formi...
