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1
artículo
Publicado 2019
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The effects of organic and conventional crop systems on chemical composition, antioxidant activity and functional properties were evaluated in white and dark chia (Salvia hispanica L.) seeds. The organic system reduced the total protein content, and increased the total carbohydrates but did not change polyunsaturated fatty acids, total phenolic or flavonoids. Organic white chia seeds showed the best techno-functional properties. The antioxidant capacity of chia extracts varied in relation to the chemical complexity and differential rate kinetics of different assays. Extractable total phenolic acids and antioxidant capacity were better in organic white chia seeds. In this first approach, we have demonstrated that the organic white chia seed has a better total antioxidant capacity measured by direct quencher approaches than its conventionally-grown counterpart. To summarize, we conclude th...
2
artículo
Publicado 2019
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The effects of organic and conventional crop systems on chemical composition, antioxidant activity and functional properties were evaluated in white and dark chia (Salvia hispanica L.) seeds. The organic system reduced the total protein content, and increased the total carbohydrates but did not change polyunsaturated fatty acids, total phenolic or flavonoids. Organic white chia seeds showed the best techno-functional properties. The antioxidant capacity of chia extracts varied in relation to the chemical complexity and differential rate kinetics of different assays. Extractable total phenolic acids and antioxidant capacity were better in organic white chia seeds. In this first approach, we have demonstrated that the organic white chia seed has a better total antioxidant capacity measured by direct quencher approaches than its conventionally-grown counterpart. To summarize, we conclude th...
3
artículo
Publicado 2014
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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
Publicado 2014
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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
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.
6
artículo
Publicado 2019
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Juan D. Rios-Mera and Erick Saldaña are grateful to the support of the Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica – CONCYTEC, from Peru (CIENCIACTIVA programme, PhD scholarship contracts: No. 238-2018-FONDECYT and No. 104-2016-FONDECYT). Juan D. Rios-Mera is also grateful for the scholarship granted by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – CAPES, from July 2017 to January 2019.
7
tesis de grado
Desde hace varias décadas se sabe de la existencia de las enfermedades periodontales, dentro de las cuales está la Periodontitis, al inicio no se sabía el origen exacto de la enfermedad, por lo cual los tratamientos que usaban no obtenían los resultados esperados y la enfermedad Periodontal avanzaba rápidamente llegando a poducir perdida prematura de piezas dentarias, con los avances tecnológicos se descubrió que eran los microorganismos presentes en el Biofilm Dental. Fue Socransky en año 1998 que estudio mas de 1300 muestras de placa dental, estudio su composición asi como también tipos, cantidad y comportamiento de los microorganismos presentes, descubrió que hay microorganismos presentes en la cavidad oral que son beneficiosos para el Huesped ya que lo ayuda a desarrollar distintas funciones, asi como también otros que son dañinos para los tejidos orales; la presencia en...
8
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...
9
artículo
Publicado 2018
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The authors are grateful to the São Paulo Research Foundation (FAPESP, Brazil) for funding projects n° 2016/18052-5 and 2014/16998-3 and the L.H. Campestrini post-doctoral fellowship (2011/51707-1); the National Council for Scientific and Technological Development (CNPq, Brazil) for funding the project n° 401004/2014-7; Cienciactiva for the A.C. Miano Ph.D. scholarship (Contract 272-2015-FONDECYT) and E. Saldaña Ph.D Scholarship (Contract 104-2016-FONDECYT) from the “Consejo Nacional de Ciencia, Tecnología e Inovación Tecnológica" (CONCYTEC, Peru). The authors are also grateful to the “Núcleo de Apoio à Pesquisa em Microscopia Eletrônica Aplicada à Pesquisa Agropecuária” (NAP/MEPA-ESALQ/USP) for the support and facilities of Electronic Microscopy; to the Laboratório Multiusuário em Produção Vegetal (ESALQ/USP) for the mineral determination analysis and to Prof. Dr. ...
10
artículo
Publicado 2019
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This research was funded by FONDECYT–CONCYTEC (grant contract number 274-2015-FONDECYT).
11
artículo
Publicado 2024
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This study aimed to determine the impact of age on the fecal microbiota in the genetic nucleus of cattle, with a focus on microbial richness, composition, functional diversity, and correlations with blood parameters. Fecal and blood samples from 21 cattle were analyzed using 16S rRNA gene sequencing. Older cattle exhibited greater bacterial diversity and abundance, with significant changes in alpha diversity indices (p < 0.05). Beta diversity analysis revealed significant variations in microbial composition between age groups and the interaction of age and sex (p < 0.05). Correlations between alpha diversity, community composition, and hematological values highlighted the influence of microbiota on bovine health. Beneficial butyrate-producing bacteria, such as Ruminococcaceae, were more abundant in older cattle, suggesting a role in gut health. Functional diversity analysis indicated tha...
12
artículo
Publicado 2024
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This study aimed to determine the impact of age on the fecal microbiota in the genetic nucleus of cattle, with a focus on microbial richness, composition, functional diversity, and correlations with blood parameters. Fecal and blood samples from 21 cattle were analyzed using 16S rRNA gene sequencing. Older cattle exhibited greater bacterial diversity and abundance, with significant changes in alpha diversity indices (p < 0.05). Beta diversity analysis revealed significant variations in microbial composition between age groups and the interaction of age and sex (p < 0.05). Correlations between alpha diversity, community composition, and hematological values highlighted the influence of microbiota on bovine health. Beneficial butyrate-producing bacteria, such as Ruminococcaceae, were more abundant in older cattle, suggesting a role in gut health. Functional diversity analysis indicated tha...
13
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...
14
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.
15
informe técnico
Publicado 2021
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Nanometric soot particles generated by incomplete oxidation of fuels have a negative impact on the climate change and human health. Although the soot production improves the radiative heat transfer in combustion systems, their mechanisms of formation/oxidation are not well understood due to the complex morphology and composition of soot particles inside the flame. In addition, measurements in flames are challenging due to high gradients of concentration and temperature, so non-intrusive techniques with high spatial and temporal resolution must be applied. After fuel pyrolysis, soot production beginning with the birth of incipient nascent soot particles; which are then transform into young soot by surface chemical reaction and surface condensation of polycyclic aromatic hydrocarbons (PAHs). This is followed by further growth of soot particles through surface reactions and clusters aggrega...
16
informe técnico
Publicado 2021
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Nanometric soot particles generated by incomplete oxidation of fuels have a negative impact on the climate change and human health. Although the soot production improves the radiative heat transfer in combustion systems, their mechanisms of formation/oxidation are not well understood due to the complex morphology and composition of soot particles inside the flame. In addition, measurements in flames are challenging due to high gradients of concentration and temperature, so non-intrusive techniques with high spatial and temporal resolution must be applied. After fuel pyrolysis, soot production beginning with the birth of incipient nascent soot particles; which are then transform into young soot by surface chemical reaction and surface condensation of polycyclic aromatic hydrocarbons (PAHs). This is followed by further growth of soot particles through surface reactions and clusters aggrega...
17
revisión
Publicado 2021
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This research was supported by the Phosagro/UNESCO/IUPAC Partnership in Green Chemistry for Life (Contract ). JCFRR acknowledges the support of 4500245048FONDECYT and the World Bank (Contract 106-2018).The participation of GL was possible through the Real Life Experience (RLE) program at UTEC. Karinna Visurraga is thanked for administrative support.
18
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...
19
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...
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...
