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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 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...
4
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...
5
artículo
The restoration of a root canal treated tooth with change of color represents a challenge in the current dentistry, since in some cases it is not enough to perform only one procedure that is the appropriate one in our opinion, but it is possible to consider choosing a set of them to obtain satisfactory results. It is not sufficient to know the forms of the dental pieces if these are not homogenized with the other ones in all their aspects; consequently, the color gains vital importance to perform a good restoration procedure. By applying procedures such as internal and external whitening, as well as composite resins, suitable results can be obtained giving back the patient the aesthetics and function lost. In this article, some basic criteria are detailed to be taken into account in the resolution of a case of dyschromia combining whitening and composite resins procedures; the results ob...
6
artículo
The restoration of a root canal treated tooth with change of color represents a challenge in the current dentistry, since in some cases it is not enough to perform only one procedure that is the appropriate one in our opinion, but it is possible to consider choosing a set of them to obtain satisfactory results. It is not sufficient to know the forms of the dental pieces if these are not homogenized with the other ones in all their aspects; consequently, the color gains vital importance to perform a good restoration procedure. By applying procedures such as internal and external whitening, as well as composite resins, suitable results can be obtained giving back the patient the aesthetics and function lost. In this article, some basic criteria are detailed to be taken into account in the resolution of a case of dyschromia combining whitening and composite resins procedures; the results ob...
7
artículo
Publicado 2024
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Commercial tara protein (CTP) and sacha inchi oil are promising Peruvian products for forming food emulsions. The present work aimed (1) to characterize the functional properties of CTP as a new protein source (water and oil absorption, foam, and gelling capacity) and (2) to deepen the CTP to form sacha inchi oil emulsions. The CTP (2%, 4%, 6%) and oil concentration (15%, 20% and 25%) were evaluated for rotor-stator (RS) emulsion production. Final emulsions (RS-US) were produced with RS emulsions added with 2% tara gum and ultrasound homogenization at 75% power amplitude for 3 min. Emulsions were analyzed according to gravitational stability, droplet size, and optical microscopy. The results showed that the CTP presented a centesimal composition of 6.03% moisture, 45.16% proteins, 12.32% lipids, 2.49% fiber, 6.04% ashes, and 27.96% carbohydrates. CTP had a greater oil absorption (2.1442 ...
8
artículo
Publicado 2018
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The complex refractive indices of formamidinium cesium lead mixed-halide [FA0.83Cs0.17Pb(I1– xBrx)3] perovskite thin films of compositions ranging from x = 0 to 0.4, with both flat and wrinkle-textured surface topographies, are reported. The films are characterized using a combination of variable angle spectroscopic ellipsometry and spectral transmittance in the wavelength range of 190 nm to 850 nm.
9
artículo
Publicado 2025
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The sequence of a comprehensive oral rehabilitation is described in a patient with generalized loss of tooth structure, highlighting the importance of restoring stomatognathic system function through a multidisciplinary approach. The patient was a 57-year-old woman diagnosed with occlusal disharmony, generalized attrition due to parafunction, mild dental crowding, defective restorations, carious lesions, and partial mandibular edentulism. Treatment was performed in two phases: initially, an esthetic mini-JIG was used, and occlusion was stabilized by increasing the vertical dimension using stamped composite resins restorations. In the second phase, veneers, vonlays, and implant-supported crowns were placed in the maxilla, along with a removable partial denture in the mandible, followed by delivery of a protective occlusal splint. The combination of analog and digital techniques allowed fo...
10
tesis de maestría
Publicado 2020
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Los puntos cuánticos de grafeno (GQDs) son un nuevo miembro de la familia de los materiales carbonosos que han concitado gran interés por las propiedades y aplicaciones en diferentes campos como el de sensores, catálisis, medicina, etc. Sus propiedades varían con su tamaño, morfología, dopaje y grupos funcionales presentes en su estructura; a pesar de ello en la literatura no se hace una clara distinción entre GQDs y la especie que contiene grupos funcionales oxigenados, cuya estructura es más probable por el tipo de método de síntesis utilizado y que algunos autores denominan puntos cuánticos de óxido de grafeno (GOQDs). Esta tesis está enfocada en combinar métodos computacionales y experimentales para el estudio de la síntesis electroquímica de GOQDs, su comportamiento en solventes de diferente naturaleza y el efecto de estos al incorporarlos en compósitos basados en T...
11
tesis de maestría
Publicado 2018
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The complex refractive indices of formamidinium cesium lead mixed-halide (FA0.83Cs0.17Pb(I1 − xBrx)3) perovskite thin films of compositions ranging from x = 0 to 0.4, with both flat and wrinkle-textured surface topographies, are reported. Films are characterized using a combination of variable angle spectroscopic ellipsometry and spectral transmittance in the wavelength range of 190 nm to 850 nm. Optical constants, film thicknesses and roughness layers are obtained point-by-point by minimizing a global error function, without using optical dispersion models, and including topographical information supplied by a laser confocal microscope. To evaluate the bandgap engineering potential of the material, the optical bandgaps and Urbach energies are then accurately determined by applying a band fluctuations model for direct semiconductors, which considers both the Urbach tail and the fundame...
12
Publicado 2018
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El objetivo de este trabajo de investigación es dar a conocer que en el diseño arquitectónico, se consideran tanto las formas geométricas planas como el cuadrado, el círculo y el triángulo, como los volúmenes tridimensionales creados por ellas, como el cubo, el prisma, la esfera, la pirámide y el cono, cuando se analiza la relación entre función y forma. El arquitecto logra crear una composición que conformará la estructura exterior de la edificación mediante la combinación de estas formas tridimensionales y el uso de operaciones de adición o sustracción, o ambas. La configuración arquitectónica ha sido constante desde épocas ancestrales, y cada cultura ha desarrollado su propia identidad arquitectónica, con similitudes o diferencias con otras culturas. Posteriormente, surgió el Funcionalismo como una tendencia arquitectónica. En su origen se encuentra la raíz de e...
13
artículo
Publicado 2018
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The complex refractive indices of formamidinium cesium lead mixed-halide [FA0.83Cs0.17Pb(I1– xBrx)3] perovskite thin films of compositions ranging from x = 0 to 0.4, with both flat and wrinkle-textured surface topographies, are reported. The films are characterized using a combination of variable angle spectroscopic ellipsometry and spectral transmittance in the wavelength range of 190 nm to 850 nm. Optical constants, film thicknesses and roughness layers are obtained point-by-point by minimizing a global error function, without using optical dispersion models, and including topographical information supplied by a laser confocal microscope.
14
artículo
Publicado 2018
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This study is part of research developed in the area of Food Science, Department of Analytical Chemistry and Food, University of Vigo Ourense Campus, Spain.; whose ultimate goal is to occurring fermented beverages with probiotic properties with kefir grains juice of red and white grapes would thus not valuing vinificables grapes with low commercial value or direct consumption. And obtaining healthy drinks combining ink effects mainly polyphenol grape character with antioxidant kefir and functional benefits. Kinetics main fermentation process cash studied, the effect of change on the fermentation substrate and microbial populations analyzed kefir. The procedure was carried out as follows: the pellet was activated, conducted a sequence of four successive crops. In each one the juice grain was incubated of nonsterile red grape during 24 h. The grain separated and juice fermented by fr...
15
tesis de maestría
Publicado 2017
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Los índices de refracción complejos de películas delgadas de perovskitas de haluros mixtos de formamidinio-cesio de plomo (FA0.83Cs0.17Pb(I1 − xBrx)3), con composiciones variando de x = 0 a 0.4, y para topografías planas y de textura rugosa, son reportadas. Las películas se caracterizan por medio de una combinación de elipsometría espectral de ángulo variable y transmitancia espectral en el rango de longitudes de onda de 190 nm a 850 nm. Las constantes ópticas, espesores de las películas y las capas de microrugosidad, son determinadas con un método “punto a punto”, minimizando una función de error global, sin hacer uso de modelos de dispersión, e incluyendo información topográfica proporcionada por un microscopio con focal láser. Para evaluar el potencial de ingeniería del ancho de banda del material, sus anchos de banda y energías de Urbach son determinadas con e...
16
tesis doctoral
Publicado 2022
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Universidad Nacional Agraria La Molina. Escuela de Posgrado. Doctorado en Ciencia Animal
17
tesis de grado
Publicado 2025
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Fruits such as papaya (Carica papaya), star fruit (Averrhoa carambola) and camu camu (Myrciaria dubia) are seasonal fruits from the Amazon region of Peru, characterized by their high content of bioactive compounds such as vitamin C, vitamin A, antioxidants and tocopherols. This study was carried out entirely in the laboratories of the Amazonian Natural Resources Research Center of the UNAP. using the Peruvian Food Composition Tables (2025) for the nutritional characterization of raw materials, the antioxidant capacity was evaluated using the -2-2-diphenyl-1-picrylhydracil methodology, using 517 nanometers, the gallic acid content was determined following the method described by Folin - Ciocalteu, Graphs of percentage of antioxidant (PA%) versus concentration of -2-2 diphenyl-1-picrylhydracil were also elaborated, and % activation vs total phenol content for each fruit, subsequently, a fu...
18
tesis de maestría
Publicado 2018
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Los aditivos, presentes hace mucho tiempo en la tecnología de la construcción, pueden transmitir excelentes propiedades físicas y químicas, teniendo la capacidad de poder ser aplicados en muchos campos, para proporcionar nuevas funciones y características. Y esta es la razón por la cual, los últimos desarrollos en el campo de la construcción, están asociados con la evolución de estos aditivos, siendo necesarios para generar mezclas con alta resistencia a los sulfatos, con un contenido de aire óptimo, entre otras propiedades; manteniendo sin embargo hasta la actualidad como principal función, actuar como agente plastificante, dentro de las mezclas de concreto, retardando la pérdida del slump y de la fragua inicial, a través de complejas interacciones químicas. Y es precisamente por este motivo, que cobra importancia esta investigación, titulada "Influencia de la composici...
19
tesis de grado
Publicado 2022
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Universidad Nacional Agraria La Molina. Facultad de Industrias Alimentarias. Departamento Académico de Tecnología de Alimentos y Productos Agropecuarios
20
tesis de maestría
Publicado 2017
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Los índices de refracción complejos de películas delgadas de perovskitas de haluros mixtos de formamidinio-cesio de plomo (FA0.83Cs0.17Pb(I1 − xBrx)3), con composiciones variando de x = 0 a 0.4, y para topografías planas y de textura rugosa, son reportadas. Las películas se caracterizan por medio de una combinación de elipsometría espectral de ángulo variable y transmitancia espectral en el rango de longitudes de onda de 190 nm a 850 nm. Las constantes ópticas, espesores de las películas y las capas de microrugosidad, son determinadas con un método “punto a punto”, minimizando una función de error global, sin hacer uso de modelos de dispersión, e incluyendo información topográfica proporcionada por un microscopio con focal láser. Para evaluar el potencial de ingeniería del ancho de banda del material, sus anchos de banda y energías de Urbach son determinadas con e...
