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1
artículo
Publicado 2021
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Passion fruit peel is an agro-industrial waste that with added value can be used in the food industry. The purpose of this work was the physicochemical, functional and rheological characterization of passion fruit shell flour (HCMr). Physicochemical, functional and rheological analyzes were carried out. The humidity value of HCMr was 11.25%, this is within the requirements of Peruvian standards. Protein values (5.14%) are low compared to cerelae flours. The total dietary fiber value was 63.88%. The total values of polyphenols and antioxidant activity were 504.75 mg G.A.E./100g and 1520.49 µmol ET / 100g respectively. The water retention capacity value was 12.93 ml retained water / g. The rheological values were: 702 consistency farinographic units with 14.02% humidity. With these characteristics obtained, HCMr can be used as an ingredient or food substitute and thus obtain products with...
2
artículo
Publicado 2024
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The germination of quinua improves the content of polyphenols, flavonoids, amino acids, dietary fiber, vitamin E, antioxidants and other bioactive compounds, making this pseudocereal a nutritious and healthy source for the preparation of functional foods. The aim of this work was to assess the effect of the germination of quinua on the nutritional, biological and functional properties, in turn to be able to analyze the potential that this golden grain has in the food industry. For the systematic review, the databases (Scopus, Scielo and Science Direct) were used, following the PRISMA guideline and the PIO strategy (Population, Intervention, Outputs), which helped to formulate the search equations and to identify the most relevant articles of the last 5 years. The results of the bibliometric analysis showed that the germination of quinua improves the nutritional properties and the content...
3
artículo
Publicado 2024
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The germination of quinua improves the content of polyphenols, flavonoids, amino acids, dietary fiber, vitamin E, antioxidants and other bioactive compounds, making this pseudocereal a nutritious and healthy source for the preparation of functional foods. The aim of this work was to assess the effect of the germination of quinua on the nutritional, biological and functional properties, in turn to be able to analyze the potential that this golden grain has in the food industry. For the systematic review, the databases (Scopus, Scielo and Science Direct) were used, following the PRISMA guideline and the PIO strategy (Population, Intervention, Outputs), which helped to formulate the search equations and to identify the most relevant articles of the last 5 years. The results of the bibliometric analysis showed that the germination of quinua improves the nutritional properties and the content...
4
artículo
The functional compounds present in food are essential to prevent certain types of cancer, so it is important to know how they vary in the food during storage. The study was conducted in the Puno region in 2019; the objective of the trial was to evaluate the behavior of functional compounds in two accessions of Isaño: Yana añu (purple-dark color) and Yellow pumpkin with purple eyes during storage at natural conditions 13 ºC and 65 % of relative humidity. The method used to determine the polyphenols was the one described by Folin-Ciocalteu; ABTS to determine the CAOX and visual titration with 2-6 Dichlorophenolindophenol to quantify the vitamin C content. The results show that the Yana añu accession has the highest polyphenol content and antioxidant capacity compared to the yellow pumpkin with purple eyes accession, being these values for polyphenols 24.90 and 15.89 mg AGE.g-1, which ...
5
artículo
Publicado 2021
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The Rietveld refinement method has taken high relevance since its creation. Nowadays, it is an useful tool in many fields of industry, materials science, and technology. For these reasons, it becomes a need for scientists and engineers whom pretend to use it for proper analysis of their materials. However, the initiation in the method can be slow, taking into account the accelerated rhythm of the research and economic demands. Thus, this work is an intend to fulfill this hole, providing the basic foundations and methodology of the Rietveld refinement in a brief way, this along with the results of its application in superconducting samples of Yttrium Barium Copper Oxide and magnesium diboride, and functional magnetic nanoadsorbents of maghemite and a multiphasic composite (iron oxide, hydroxyapatite and secondary phases). In the process, an in-detail protocol was designed and provided. It...
6
artículo
Publicado 2019
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Maca is nutritious, energetic and functional food. As a defense mechanism, its secondary metabolites react to biotic and abiotic stress, during pre-harvest, harvest and traditional post-harvest drying. The aim of this review is to evaluate and provide relevant scientific information about bioactives, biochemistry and biological activity of the maca (Lepidium meyenii Walpers or Lepidium peruvianum Chacón) related to health and reassess its functional food condition. A search of four electronic databases and information required from the authors was used for this review. There is a lack of in vivo and clinical research with more representative sample sizes and more consistent methodologies. Therefore, glucosinolates, phenolic compounds, phytosterols, macaenes, macamides, macahidantoins, meyeniins, alkaloids and others formed during the productive cycle of maca act synergistically to preve...
7
artículo
Publicado 2019
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Maca is nutritious, energetic and functional food. As a defense mechanism, its secondary metabolites react to biotic and abiotic stress, during pre-harvest, harvest and traditional post-harvest drying. The aim of this review is to evaluate and provide relevant scientific information about bioactives, biochemistry and biological activity of the maca (Lepidium meyenii Walpers or Lepidium peruvianum Chacón) related to health and reassess its functional food condition. A search of four electronic databases and information required from the authors was used for this review. There is a lack of in vivo and clinical research with more representative sample sizes and more consistent methodologies. Therefore, glucosinolates, phenolic compounds, phytosterols, macaenes, macamides, macahidantoins, meyeniins, alkaloids and others formed during the productive cycle of maca act synergistically to preve...
8
artículo
Publicado 2019
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Maca is nutritious, energetic and functional food. As a defense mechanism, its secondary metabolites react to biotic and abiotic stress, during pre-harvest, harvest and traditional post-harvest drying. The aim of this review is to evaluate and provide relevant scientific information about bioactives, biochemistry and biological activity of the maca (Lepidium meyenii Walpers or Lepidium peruvianum Chacón) related to health and reassess its functional food condition. A search of four electronic databases and information required from the authors was used for this review. There is a lack of in vivo and clinical research with more representative sample sizes and more consistent methodologies. Therefore, glucosinolates, phenolic compounds, phytosterols, macaenes, macamides, macahidantoins, meyeniins, alkaloids and others formed during the productive cycle of maca act synergistically to preve...
9
artículo
Publicado 2019
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Maca is nutritious, energetic and functional food. As a defense mechanism, its secondary metabolites react to biotic and abiotic stress, during pre-harvest, harvest and traditional post-harvest drying. The aim of this review is to evaluate and provide relevant scientific information about bioactives, biochemistry and biological activity of the maca (Lepidium meyenii Walpers or Lepidium peruvianum Chacón) related to health and reassess its functional food condition. A search of four electronic databases and information required from the authors was used for this review. There is a lack of in vivo and clinical research with more representative sample sizes and more consistent methodologies. Therefore, glucosinolates, phenolic compounds, phytosterols, macaenes, macamides, macahidantoins, meyeniins, alkaloids and others formed during the productive cycle of maca act synergistically to preve...
10
informe técnico
Publicado 2018
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Las verduras, frutas, bacterias “ácidos láticas “juegan un papel importante en la dieta porque además de suministrar nutrientes, contienen sustancias no nutritivas, pero que son esenciales para nuestro organismo porque cumplen una función, ayudando a algunos órganos, que intervienen en el metabolismo, también denominados compuestos bioactivos, los cuales pueden tener efectos fisiológicos beneficiosos, al modular funciones corporales u orgánicas específicas. Muchos de ellos tienen potencialmente las posibilidades de contribuir a mejorar la salud de los individuos y quizás, de reducir el riesgo o retrasar el desarrollo de algunas enfermedades. Por tal razón, estos componentes las verduras, frutas, bacterias “ácido láctico” que los contienen se denominan también alimentos funcionales. Por lo anterior el objetivo del presente trabajo es contribuir en el consumo de verdu...
11
artículo
Publicado 2017
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En el presente trabajo se llevaron a cabo dos diseños experimentales para la determinación de las condiciones óptimas de la fabricación de nanohilos de nylon y síntesis de grafeno, para lo cual se obtuvo: 0.68 M de (NH4)2SO4 y 11.45 V; 27 kV, 2.3 mL/h y 11.40 cm de distancia de la aguja al colector (cm); respectivamente. De esta manera, se produjeron electrohilos de nylon y grafeno, ambos de tamaño nanométrico. A partir de estos materiales se preparó un compósito nanohilos/grafeno, a las condiciones óptimas de fabricación. Los materiales obtenidos (nanohilos de nylon, grafeno y compósito) fueron caracterizados morfológica (SEM) y químicamente (FTIR, UV), comprobando su escala nanométrica, grupos funcionales y sus propiedades bloqueadoras de rayos UV. Es así, como este trabajo abre una nueva perspectiva al uso de nylon reciclado para la obtención de hilos electrohilados d...
12
artículo
Publicado 1968
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The triiodothyronine uptake test, was performed on 44 patients suffering from a variety of thyroid diseases plus 11 pregnant women, using this hormone labeled with I-131 and ionic exchange resin. Among the 44 patients there were 20 with thyrotoxicosis, 10 hypothyroid, 8 with diffuse non-toxic goiter and 6 with other thyroid conditions with no evidence of thyroid disfunction. An averange of 48,9% uptake for the hyperthyroid, 22,2% for the hypothyroid an 23,3% for the pregnant women was found. This gave a very significant difference from the normal group that averaged 32% according to a previous report. There was no difference between the normal group and the other two groups having no functional disturbance. Our results agree with the findingsof the other investigators in other countries. We think that this is a useful test adding a new parameter for the study of thyroid function. It is n...
13
tesis de grado
Publicado 2012
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It study the production of oxygenated organic compounds by pyrolysis of mango pit is studied. the influence of the reaction temperature, nitrogen flow, humidity and particle size of the raw material is investigated. the functional groups are identified by infrared spectroscopy with Fourier transform of the liquid product obtained in the organic and aqueous phase. The results show that increasing the reaction temperature influences cyclically in the product, indicating a dynamic formation-destruction of the functional groups. Thus, when at a temperature forming functional groups in organic compounds in aqueous compositions is opposite effect is favored. The nitrogen flow in the range of 30 to 150 cm3 min-1, does not influence the formation-destruction of the functional groups present in organic and aqueous compounds, but 200 cm3 min-1 adversely affects the yield of liquid product total. H...
14
artículo
Publicado 2015
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Objective:To identify obstacles and errors that manifest students of the National University of Apurimac –Micaela Bastidasregarding the use of different representations of the function concept. Method:Descriptive study with non-experimental design of simple descriptive type. The collection of information was done through a questionnaire composed of 9 open questions, a sample of 99 students from different careers of the University. Results:Students prevail with the conception of function as an equation. There is a better performance when they work with an algebraic expression that can be evaluated; when they are working in other forms of representation show difficulties to carry out coordination and conversions. Conclusion:It was identified the obstacle of epistemological and cognitive type related to the consideration that a function must be written by a single algebraic expression; an...
15
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...
16
artículo
Publicado 2019
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Porous films formed by a semiconductor ZnO-NiO (% mol) doped with Au nanoparticles (3% mol) were prepared by sol-gel method using nickel acetate tetrahydrate (NiC4H6O4.4H2O) and zinc acetate dihydrate (C4H6O4Zn.2H2O) as precursors, methanol (CH6OH) and ethanol (C2H6O) as solvents, monoethanolamine (C2H7NO) and diethanolamine (C4H11NO2) as functional chelants, and chloroauric acid (HAuCl4) as gold precursor. The samples were characterized by infrared (IR) and ultraviolet (UV-VIS) spectroscopy, microscopy SEM, X-ray diffraction (XRD) and gas sensing tests. The semiconductor samples were deposited on silicon substrates by spin-coating method at 2000 rpm, subsequently annealing at 500 and 600 °C. The effects of the compositions of NiO-ZnO and the percentage of doping are also discussed. The layer thickness was determined by ellipsometry in approximately 75 nm. These compounds were test...
17
tesis de grado
Publicado 2025
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Universidad Nacional Agraria La Molina. Facultad de Industrias Alimentarias. Departamento Académico de Tecnología de Alimentos y Productos Agropecuarios
18
objeto de conferencia
Publicado 2020
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ABSTRACT This work evaluated the influence of the concentration of NaOH (100, 200 and 300 g/L NaOH) in the mercerization process at 25 °C for 1 h, and of the percentage (15, 20 and 25% m/m) of Mauritia flexuosa fibers on impact resistance in a polyester matrix composite. The polyester matrix composite was obtained by the compression molding process, at a constant pressure of 24 MPa. The obtained plates had a dimension of 130 mm long x 80 mm wide x 3.4 mm thick. Specimens for the impact assay were extracted from the obtained plates under the EN ISO 179-1 standard. Likewise, the fiber-reinforced composites without treatment were also evaluated, all the fibers were characterized before and after the NaOH treatment by means of the chemical characterization of the fiber, absorption percentage, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy ( FT-IR). The result...
19
tesis de grado
Publicado 2025
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Los pobladores de todo el mundo utilizan plantas medicinales para poder prevenir y/o curar enfermedad, ya que lo consideran un método alternativo a la medicación habitual. El presente trabajo de investigación tuvo como objetivo determinar compuestos bioactivos, metales y citotoxicidad de la raíz de Heliotropium Curassavicum L. La especie vegetal fue recolectada en la ciudad de Chincha, se maceró en alcohol de 96° para luego obtener el extracto seco de la misma. Los compuestos bioactivos se determinaron mediante la realización de una marcha fitoquímica, en donde se obtuvieron diferentes fracciones y en cada una se realizaron reacciones de coloración y/o precipitación para el reconocimiento de grupos funcionales. La determinación de metales fue realizada mediante el método de Espectrometría de Emisión Atómica de Plasma Acoplado Inductivamente. La citotoxicidad se analizó me...
20
tesis de maestría
Publicado 2018
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El presente trabajo se centró en la síntesis y la caracterización de carbón activado modificado con cobre con el propósito de a) potenciar las propiedades del carbón como material adsorbente de compuestos fenólicos: fenol, 4-nitrofenol y 4-clorofenol, b) evidenciar la propiedad bacteriostática del carbón modificado con cobre en contacto con las cepas de Escherichia coli. Se utilizaron como precursor semillas de aguaje (Mauritia Fleuxuosa L.f.), que es un material lignocelulósico, abundante y renovable. Se estudió el efecto de la funcionalización ácida del carbón activado variando la concentración del ácido, temperatura y tiempo de contacto, y analizando su efecto en el cobre incorporado en la superficie del carbón. Los resultados mostraron una disminución en la capacidad de adsorción del carbón funcionalizado y modificado con cobre. Se realizó el estudio de la capaci...
