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1
tesis de grado
Antecedentes: Los cambios de estilo de vida y la mayor valoración de una dieta saludable ha permitido el desarrollo de alimentos y bebidas funcionales. Estas bebidas funcionales, sean naturales o artificiales, contienen sustancias benéficas para la salud o potencian algún aspecto de esta. Además, se consumen con cierta frecuencia y presentan pigmentos relacionados a sus componentes. No existe información sobre el efecto que puede producir sobre restauraciones de composite. Objetivo: Evaluar la influencia de bebidas funcionales en el color de un composite de nanorelleno. Materiales y Métodos: Se confeccionaron 60 especímenes de composites (Filtek™ Z350 XT, 3M ESPE, St. Paul, EEUU) color A2 (7 mm diámetro x 2 mm altura). Los especímenes fueron inmersos en las bebidas (Vitaenergía, ON, No Stress, Amalaki, café y agua destilada) por 30 minutos durante 28 días. El registro del c...
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artículo
Bulk-fill composite resins have emerged as a key innovation in restorative dentistry, offering an efficient and modern alternative for direct dental restorations. These resins allow for the placement of thicker layers, reducing clinical time. Among their main features are their adaptability, adequate depth of polymerization, and mechanical properties, which meet clinical requirements for functional and durable restorations. The clinical benefits of bulk-fill resins include reduced polymerization shrinkage stress and simplified handling, making them particularly useful for deep cavity restorations. However, despite these advantages, controversies have arisen regarding their long-term performance, such as color stability and wear resistance in areas of high occlusal load. This article reviews the fundamental characteristics of bulk-fill resins, their clinical benefits, and the controversie...
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artículo
Zea Mays L. variety purple (purple corn) is a plant native of America, which has the episperm seeds (grains) and the cobs (cob) in purple, which gives special characteristics to the pigments that have (between 1.5% and 6.0%), called anthocyanins, which belong to the group of flavonoids. Due to its high content of anthocyanins (cianin C3G-3-glucose as its main color) and phenolic compounds act as powerful natural antioxidant and anticancer, Further having functional properties due to these bioactive compounds. The purple corn also provides significant amounts of starch, about 80% (complex carbohydrate), 10% of sugars provide sweetness, up to 11% protein, up to 2% minerals and B vitamins and ascorbic acid, concentrated in endosperm (grain free envelope). Also the nutritional value, the purple corn has a rich composition of phytochemicals, which have beneficial effects on our body, such as ...
4
artículo
Zea Mays L. variety purple (purple corn) is a plant native of America, which has the episperm seeds (grains) and the cobs (cob) in purple, which gives special characteristics to the pigments that have (between 1.5% and 6.0%), called anthocyanins, which belong to the group of flavonoids. Due to its high content of anthocyanins (cianin C3G-3-glucose as its main color) and phenolic compounds act as powerful natural antioxidant and anticancer, Further having functional properties due to these bioactive compounds. The purple corn also provides significant amounts of starch, about 80% (complex carbohydrate), 10% of sugars provide sweetness, up to 11% protein, up to 2% minerals and B vitamins and ascorbic acid, concentrated in endosperm (grain free envelope). Also the nutritional value, the purple corn has a rich composition of phytochemicals, which have beneficial effects on our body, such as ...
5
artículo
This work studies the dependence of Cs-137 root uptake on the structure of landscape, especially on the properties of soils, under controlled conditions. Researches were carried out at various levels of Cs-137 contamination (from 20 up 1000 kBq/m²), with five different types of soils, which differ in texture and granulometric composition. The results showed that transfer factor (TF) values of Cs-137 differ 5 times for the natural grassy coenoses. The correlation between Cs-137 TF values and granulometric composition of soil was determined for both automorphic and hydromorphic mineral soils.
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Objective: To determine the association between frailty syndrome and family functioning among older adults with diabetic retinopathy. Materials and methods: An analytical and cross-sectional study conducted among patients diagnosed with diabetic retinopathy. The ophthalmology department diagnosed diabetic retinopathy through pupil dilation, using tetracaine and an ophthalmoscope. Three groups were determined using the FRAIL questionnaire: frail, prefrail and nonfrail; the sample sizes were 39, 64 and 76, respectively, matched by age. The study variables included age, sex, education, marital status and occupation. Additionally, the time since the diagnosis of diabetic retinopathy was measured. Furthermore, the type of family was determined according to Huerta’s classification, which identifies nuclear family, extended family, composite extended family, single-parent family and blended f...
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artículo
Microalgae are photosynthetic organisms with cosmopolitan distribution (i.e., marine, freshwater and terrestrial habitats) and possess a great diversity of species [1] and consequently an immense variation in biochemical compositions [2]. To date genomic information is available mainly from the model green microalga Chlamydomonas reinhardtii [3]. Here we provide the dataset of a de novo assembly and functional annotation of the transcriptomes of three native oleaginous microalgae from the Peruvian Amazon. Native oleaginous microalgae species Ankistrodesmus sp., Chlorella sp., and Scenedesmus sp. were cultured in triplicate using Chu-10 medium with or without a source of nitrate (NaNO3). Total RNA was purified, the cDNA libraries were constructed and sequenced as paired-end reads on an Illumina HiSeq™2500 platform. Transcriptomes were de novo assembled using Trinity v2.9.1. A total of 4...
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tesis de grado
La ratificación de magistrados en el Perú es una función conferida a la Junta Nacional de Justicia (JNJ), antes Consejo Nacional de la Magistratura, a través del artículo 154 numeral 2 de la Constitución, siendo modificada mediante la Ley Nº 30904 (Ley de Reforma Constitucional sobre la conformación y funciones de la Junta Nacional de Justicia). El escenario previo a la modificatoria no era claro con respecto a la obligación de motivar las resoluciones del Consejo Nacional de la Magistratura (CNM) tal como lo establece el artículo 142 de la Constitución. Sin embargo, el Tribunal Constitucional, a través de su jurisprudencia y recurriendo al principio de unidad y método de integración, estableció el deber de motivación a las resoluciones del Consejo Nacional de la Magistratura, fijándose como precedente vinculante la STC N.º 1412- 2007-AA/TC, en el cual se obliga a que t...
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Currently there is a great demand for food products containing functional properties and/or bioactive compounds. One of the fruits that has been widely studied is the murta (Ugni molinae), which appears to contain various beneficial health properties. This review compiles scientific information on the functional and beneficial properties of murta for human health, such as the main components associated with anti-inflammatory activity, antimicrobial activity, antioxidant activity, nutritional composition, other uses of murta, economic aspects, and current and future challenges of murta, all based on updated scientific work.
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Currently there is a great demand for food products containing functional properties and/or bioactive compounds. One of the fruits that has been widely studied is the murta (Ugni molinae), which appears to contain various beneficial health properties. This review compiles scientific information on the functional and beneficial properties of murta for human health, such as the main components associated with anti-inflammatory activity, antimicrobial activity, antioxidant activity, nutritional composition, other uses of murta, economic aspects, and current and future challenges of murta, all based on updated scientific work.
11
artículo
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...
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tesis de maestría
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...
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El objetivo de este trabajo de investigación es en el campo de las ciencias, el tema de las funciones tiene distintas aplicaciones, por lo cual es necesario su estudio. Definir conceptos y propiedades fundamentales de las funciones permite definir otros que derivan de ella, conceptos como el de equipotencia y numerabilidad, entre otros, que tienen aplicaciones en diferentes espacios científicos. En este trabajo de investigación se pretende brindar una información clara, concisa y formal de los conceptos fundamentales relacionados con las funciones, la equipotencia y numerabilidad, incluyendo algunas de sus propiedades. El presente estudio consta de cuatro capítulos; en el primero se detalla la definición de una función, cómo establecer el dominio y rango de una función, qué es el grafo de una función, cuándo decimos que existe una igualdad de funciones, los tipos de funciones...
14
tesis de maestría
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...
15
tesis de grado
En la región Cusco, las municipalidades de la provincia de La Convención reciben recursos importantes por canon gasífero, presupuesto que se orienta a la ejecución de proyectos de inversión; la Municipalidad Distrital de Huayopata destina estos recursos, principalmente, a las funciones de agropecuaria y de transporte. Teniendo en cuenta que una de sus actividades es la producción de frutas y hortalizas ha asignado como presupuesto de inversión actividades agropecuarias que no se concretizan en activos tangibles, debiendo ser evaluadas en la composición de su saldo para ser trasladadas a cuentas de gastos o reconocerlas como activo intangible, situación que no se cumple y que se refleja en los estados financieros afectando a su confiabilidad. El objetivo es identificar los problemas que presenta la información financiera por el registro de las inversiones intangibles de la funci...
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tesis de grado
This final report of the thesis implemented in the Eslabon district, describes the activities carried out in compliance with the stated objectives. The thesis entitled "ESTABLISH LINES OF ACTION FOR THE INTEGRAL MANAGEMENT OF RESIDENTIAL SOLIO WASTE OF THE ESLABON CITY, PROVINCE OF HUALLAGA, 2013 ", aims; determine the generation and physical composition of the salid waste, diagnose the current situation of the Integral Management of salid waste and propase alternative lines of action of work for proper handling, disposal and utilization of salid waste in the district of the link. With the implementation of the thesis is reached the following conclusions: ./ Per Capita Generation of Salid Waste - GPC in the Eslabon district is 0.58 kg/hab/day, which is to say that the projection of the salid waste generation in the Eslabon district will be a function of the population and this rate deter...
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artículo
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.
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tesis de grado
Universidad Nacional Agraria La Molina. Facultad de Ciencias. Departamento Académico de Biología
19
tesis de maestría
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...
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tesis de grado
Pleurocollybia cibaria Singer es una seta comestible nativa de Cusco que goza de mucha popularidad. Se expende en la fiesta de “Q’oncha Raymi” y en los mercados de la ciudad durante la época de lluvia. Su composición nutricional aún es poco conocida y no se ha profundizado sobre su composición de minerales, vitaminas y alguna propiedad funcional, cómo su actividad antioxidante. Las setas tienen la capacidad de acumular trazas de metales, resultando en un peligro potencial para la salud de los consumidores. Por estas razones, se reportó la composición nutricional, la concentración de metales pesados y la actividad antioxidante in vitro de P. cibaria Singer. Respecto a la composición nutricional, la muestra fresca contenía una alta proporción de humedad (79.48%) y deshidratada, un alto contenido de carbohidratos (44.44%), proteínas (23.83%), fibra (12.73%) y de los minera...