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1
artículo
Publicado 2023
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In recent years, the consumption of beverages has increased; however, the excessive consumption of processed and packaged foods with a high sugar content is detrimental to human health as it has led to an increase in various metabolic diseases, which is why it is essential to introduce into the food chain new options of beverages enriched with fruit pulp, rich in polyphenolic compounds and antioxidants. This research sought to develop a functional beverage based on soybean juice and aguaymanto pulp sweetened with stevia, for which nine treatments were formulated consisting of 70, 80 and 90% soybean juice, 30, 20 and 10% aguaymanto pulp and 0.08, 0.10 and 0.12% stevia, and their physicochemical characteristics, sensory acceptability and bioactive composition were evaluated. The results showed that treatment 3 presented the highest sensory acceptability by the panelists with a score of 3.3...
2
artículo
Formulation of a functional probiotic, protein and energy drink beverage based on mago pulp and whey
Publicado 2025
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Childhood malnutrition and anemia constitute a serious public health problem, driving the search for foods enriched with protein and vitamin supplements to help reduce this issue. In this context, the present research was developed with the objective of creating a protein rich, probiotic, and energy boosting becerage based on mango (Mangifera indica), whey, and Lactobacillus casei. Five treatments were formulated with different proportions of mango pulp and whey (T1: 90/10, T2: 70/30, T3: 50/50, T4: 30/70, and T5: 10/90, with two replicates per treatment. The bererages were inoculated with L. casei, and the pH was monitored every 48 hours for 14 days. Aprogessive decrease in pH from 5.0 - 6.0 to aproximately 4.0 was observed, demonstrating the viability and stability of the probiotic during storage. Regarding protein composition, treatment T5 reached 4.92 g/100 ml of protein, while treat...
3
artículo
Publicado 2024
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The soil microbiome, a crucial component of agricultural ecosystems, plays a pivotal role in crop production and ecosystem functioning. However, its response to traditional tillage systems in potato cultivation in the Peruvian highlands is still far from understood. Here, ecological and functional aspects of the bacterial community were analyzed based on soil samples from two traditional tillage systems: 'chiwa' (minimal tillage) and 'barbecho' (full tillage), in the Huanuco region of the Peruvian central Andes. Similar soil bacterial community composition was shown for minimal tillage system, but it was heterogeneous for full tillage system. This soil bacterial community composition under full tillage system may be attributed to stochastic, and a more dynamic environment within this tillage system. 'Chiwa' and 'barbecho' soils harbored distinct bacterial genera into their communities, i...
4
artículo
Publicado 2015
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This paper presents an analytical solution for the thermoelastic bending analysis of advanced composite sandwich plates by using a new quasi-3D hybrid type HSDT with 6 unknowns which is based on a generalized formulation. In addition, the nonlinear term of the temperature field is included in the generalized mathematical formulation in such way that it can be freely chosen and if desired can be different from the shear strain shape functions of the displacement field. So, infinite quasi-3D hybrid type HSDTs with just 6 unknowns can be derived from the present generalized formulation. The thermoelastic bending governing equations are obtained through the principle of virtual works and solved via Navier Method. Interesting results are obtained and compared with quasi-3D and 2D HSDTs. Transverse shear stress results are strongly influenced by nonlinear temperature field and for different HS...
5
tesis de grado
Publicado 2025
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The objective of this study was to elaborate a functional nectar based on Averrhoa carambola (carambola) and Physalis angulata (mullaca), using Stevia rebaudiana (Stevia) and Apis mellifera (honey) as natural sweeteners. An experimental type of research was developed, establishing technological formulation parameters and evaluating the nutritional quality by means of proximal analysis, microbiological quality, antioxidant capacity applying DPPH and ABTS techniques, as well as the quantification of phenols and sensory acceptability through a hedonic test. The results showed that the type of sweetener influenced the nutritional composition of the nectar, with higher carbohydrate and energy content observed in the formulations with honey. Microbiological analyses confirmed the safety of all samples. In terms of antioxidant capacity, nectars sweetened with Stevia and honey showed higher acti...
6
artículo
Publicado 2019
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The mechanical behavior of advanced composites can be modeled mathematically through unknown variables and Shear Strain Thickness Functions (SSTFs). Such SSTFs can be of polynomial or non-polynomial nature and some parameters of non-polynomial SSTFs can be optimized to get optimal results. In this paper, these parameters are called “r” and “s” and they are the argument of the trigonometric SSTFs introduced within the Carrera Unified Formulation (CUF). The Equivalent Single Layer (ESL) governing equations are obtained by employing the Principle of Virtual Displacement (PVD) and are solved using Navier method solution. Furthermore, trigonometric expansion with Murakami theory was implemented in order to reproduce the Zig-Zag effects which are important for multilayer structures. Several combinations of optimization parameters are evaluated and selected by different criteria of aver...
7
libro
Publicado 2023
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La mayoría de los músicos que hemos transcurrido por alguna orquesta o grupo de música popular, luego de ingresar al Conservatorio y sumergirnos en alguna de sus especialidades (interpretación, composición, dirección, investigación o educación) hemos continuado viviendo una “realidad paralela”: la calle, los arreglos, la salsa, el jazz, los valses y festejos o también la música incidental. He aquí un texto en español escrito por un compositor graduado en la Universidad Nacional de Música, profesor - en la misma universidad - de Armonía Tradicional y también de Armonía Funcional, recursos que ha aplicado con éxito en su vida profesional. Se trata de un texto que, partiendo de las bases del sonido, llega hasta las diversas posibilidades de rearmonización de una melodía, usando para ello los materiales descritos a lo largo del libro, con ejercicios i...
8
tesis de grado
Publicado 2022
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La desionización capacitiva (CDI) es una tecnología que consiste en la electrosorción de especies iónicas provenientes de un electrolito el cual se encuentra contenido entre dos electrodos muy próximos y en presencia de un campo eléctrico. Para la construcción de un módulo o dispositivo de desalinización de agua, basado en desionización capacitiva, se fabricaron dos tipos de electrodos: uno de carbón activado y otro de carbón activado con óxido de zinc, el proceso de fabricación consiste en la conformación de una película sobre una lámina de grafito. Las características más relevantes de los electrodos tales como su morfología, superficie específica, capacitancia, resistencia eléctrica laminar, porosidad, etc. son estudiadas y analizadas con el uso de diversas técnicas, logrando establecer una clara distinción en las propiedades que corresponden a cada tipo electr...
9
artículo
Publicado 2009
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The anterior sector problems are very common in our professional practice and became vital importance to make a suitable rehabilitation in these cases; we can not do a good rehabilitation if we do not know the basic characteristics, both aesthetic and functional. Today the composites are a valid alternative for the restoration of the anterior sector, since they offer to us a conservative and aesthetic possibility, but independently of the material to use we have to based on certain rules or parameters to realize a suitable rehabilitation. In this article the basic criteria to keep in mind are detailed to restore the anterior sector as well as the skills on having used composites.
10
tesis de grado
Publicado 2020
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RESUMEN Los factores que afectan la colocación ideal del brackets incluyen la forma y el tamaño de los dientes, los pacientes suelen presentar problemas tanto de ortodoncia como de restauración, es necesario restaurar los dientes o colocar una restauración provisional antes, durante o después del tratamiento de ortodoncia, si un diente incisivo izquierdo es más corto que el otro Incisivo derecho, colocar, en posición correcta y precisa los brackets tendrá una influencia importante en el resultado del tratamiento de ortodoncia, para el tratamiento de anomalías dentarias en los incisivos se colocan carillas, las de resinas compuesta, fueron la elección en el presente informe, cuyo objetivo fue Restaurar funcional y estéticamente el incisivo central superior izquierdo, con alteración de tamaño, mediante el uso de resina compuesta a fin de ubicar correctamente el Brackets y recu...
11
El objetivo de este trabajo de investigación es el consumo de bebidas elaboradas a partir de alimentos con un alto valor nutricional viene siendo una de las actuales tendencias en lo que se refiere a la industria alimentaria, y desde las escuelas se busca impulsar por medio de áreas curriculares como Educación para el Trabajo, Ciencia y Tecnología o por medio del fomento de la participación de los estudiantes en ferias de ciencias que promueve el desarrollo de competencias científicas y tecnológicas obteniéndose resultados muy positivos. El trabajo monográfico que se presenta tiene por objetivo hacer una descripción general sobre los alimentos funcionales de nuestro territorio peruano y de los procesos tecnológicos y científicos en la formulación de bebidas o néctares que hoy en día se ve en el mercado, y que es necesario que los niños y jóvenes desarrollen emprendimient...
12
artículo
Tooth wear is the loss of hard tissue of multiple aetiology and may be due to functional or parafunctional factors. Depending on this, a restorative treatment should be chosen based on the severity of the wear, as it can result in loss of vertical dimension of occlusion (VOD), tooth sensitivity, and decreased quality of life. In these cases, the choice of restoration strategy must follow evidence-based treatment protocols, which include direct and indirect restoration techniques, as well as minimally invasive treatments based on composite resins that emerge as an alternative to conventional restorations of ceramics. This clinical case describes the treatment of a patient with severe dental wear through oral rehabilitation with composite resins through direct and indirect techniques, with the aim of preserving the tooth structure as much as possible and having greater aesthetic-functional...
13
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: ...
14
artículo
Publicado 2017
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The alterations of the lipid metabolism and the uncertainty at the moment of selecting beneficial foods to the human body lead to the investigation of omega fatty acids. The study is based on the evaluation of the effect of three preparation methods of chía seed, before getting the oil through two extraction methods and the characterization of the lipid fraction of chia seed (Salvia hispánica L.) from Colta-Ecuador. The oil yield of the conditioned seeds showed statistical differences. Regarding the extraction method, the differences were highly significant, the use of ether in the Soxhlet equipment showed the superiority in the oil performance in a relation of approximately 2:1 versus immersion in hexane. The presence and the content of fatty acids was determined by the use of a gas chromatograph with FiD detector Agilent Technologies 5975C brand, fatty acids were separated with a cap...
15
artículo
Publicado 2019
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This paper presents a static analysis of laminated composite doubly-curved shells using refined kinematic models with polynomial and non-polynomial functions recently introduced in the literature. To be specific, Maclaurin, trigonometric, exponential and zig-zag functions are employed. The employed refined models are based on the equivalent single layer theories. A simply supported shell is subjected to different mechanical loads, specifically: bi-sinusoidal, uniform, patch, hydrostatic pressure and point load. The governing equations are derived from the Principle of Virtual displacement and solved via Navier-Type closed form solutions. The results are compared with results from Layer-wise solutions and different higher order shear deformation theories available. It is shown that refined models with non-polynomial terms are able to accurately predict the through-the-thickness displaceme...
16
artículo
Publicado 2023
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Early mathematical competencies have a great impact on academic performance and on the development of more complex mathematical skills, especially in early education. Several authors have highlighted the importance of working memory and inhibition in the development of these mathematical skills; however, there is no agreement regarding the explanatory capacity of these executive domains with respect to differentiated performance in mathematics. The aim of this research was to evaluate the predictive capacity of verbal and visuospatial working memory and of behavioral and cognitive inhibition in mathematical competencies of relational logic and numerical type in 106 Chilean children of early education between 4 and 6 years old, who were evaluated with four executive tasks and an early mathematical assessment test. For data analysis, correlations and multiple linear regressions were perfor...
17
artículo
Publicado 2023
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In Peru, the payment received by the producer per kilogram of raw milk is based on a base price, to which bonuses are applied according to quality criteria established by the dairy industry. In the present study, the relationship of compositional and hygienic quality with the value of payment per kilogram of milk in a dairy in the Huaura Valley was evaluated. Retrospective information on the total solids content (%ST), mesophilic aerobic count (UFC/ml) and the payment received (Peruvian sol - S/) per kilogram of raw milk (VP) was obtained from biweekly reports for the period 2017-2020. Data were analysed using Spearman’s trend and correlation analysis. The results showed a positive trend for the %ST (from 12.02% in 2017 to 12.21% in 2020) and negative for the CFU/ml (32,690 in 2017 to 18,117 in 2020). The PV had a similar trend to the %ST (S/ 1.39 in 2017 to S/ 1.41 in 2020). The %ST a...
18
artículo
Publicado 2019
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This study presents a static analysis of laminated composite doubly curved shells using a refined kinematic model with polynomial and non-polynomial functions. In particular Maclaurin, trigonometric, exponential and zig-zag functions are employed. Refined models are based on the Equivalent Single Layer theories and obtained by using Carrera Unified formulation. The shell model is subjected to different mechanical loading such as bi-sinusoidal, uniform and point load. The governing equations are derived from the principle of virtual displacement and solved via Navier-Type closed form solutions. The results are compared with Layer-wise and higher-order shear deformation solutions available in the literature. It is shown that refined models with non-polynomial terms are capable of accurately predicting the through-the-thickness displacements and stress distributions with a low computational...
19
artículo
Publicado 2019
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The mechanical behavior of advanced composites can be modeled mathematically through unknown variables and Shear Strain Thickness Functions (SSTFs). Such SSTFs can be of polynomial or non-polynomial nature and some parameters of non-polynomial SSTFs can be optimized to get optimal results. In this paper, these parameters are called “r” and “s” and they are the argument of the trigonometric SSTFs introduced within the Carrera Unified Formulation (CUF). The Equivalent Single Layer (ESL) governing equations are obtained by employing the Principle of Virtual Displacement (PVD) and are solved using Navier method solution. Furthermore, trigonometric expansion with Murakami theory was implemented in order to reproduce the Zig-Zag effects which are important for multilayer structures. Several combinations of optimization parameters are evaluated and selected by different criteria of aver...
20
Publicado 2021
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El objetivo principal de este trabajo de investigaciòn es dar a conocer que hicimos una revisión bibliográfica, hemerográfica, fuentes digitales y apuntes de clase desarrolladas durante nuestra formación académico-profesional, teniendo como texto de base la Introducción a las estructuras algebraicas, elaborada por docentes de la UNE Enrique Guzmán y Valle. Los contenidos temáticos de la balota asignada fueron desarrollados siguiendo un estricto orden de prelación, los cuales se inician con una revisión de conceptos previos como: conjuntos, las operaciones de unión, intersección, diferencia, producto cartesiano de conjuntos; y a partir de ello definimos los conceptos de relaciones entre conjuntos, dominio y rango; relaciones definidas sobre un conjunto, el estudio de las clases de relaciones como las reflexivas, simétricas, transitivas y las relaciones de equivalencia. La re...
