El principal objetivo de la investigación fue determinar la influencia de las herramientas virtuales en el rendimiento académico de matemática, en estudiantes de una Institución Educativa Pública, Lima-2021. Metodológicamente, el tipo de investigación es básica con nivel de profundidad explicativo y de diseño no experimental. Se consideró como población objeto de estudio a 453 estudiantes de cuarto y quinto de secundaria de la Institución Educativa de la Policía Nacional del Perú (I.E.PNP.) “Precursores de la independencia Nacional”, correspondiente a la jurisdicción de la UGEL 02 de Rímac-Los olivos-SMP, se determinó una muestra de 208 estudiantes. Las técnicas para recabar información fueron el análisis documental y la encuesta. Los resultados fueron que el 63,5% de los estudiantes consultados consideraron que las herramientas virtuales se ubican en un alto nive...

La tesis “Autoeficacia Percibida y Rendimiento Académico en matemática de los estudiantes de VI ciclo de EBR de la I. E. PNP Precursores de la Independencia Nacional – Los Olivos – 2018” tiene como objetivo general determinar la influencia de la Autoeficacia Percibida en el Rendimiento Académico en Matemática. La investigación se realizó con un enfoque cuantitativo, el diseño utilizado fue el no experimental transversal; fue un estudio descriptivo y correlacional-causal. La población la constituyen 431 discentes de primer y segundo grados de educación secundaria, la muestra fue de 204 estudiantes determinada mediante el programa STATS® 2.0., con un error máximo de 5%. Se utilizaron técnicas de análisis documental y psicométricas y se administró la Escala de Autoeficacia Escolar, validada por Cartagena (2008) y aplicada en diferentes estudios; se utilizó los Regist...

acceptable, then detect the pollution source. It was performed a microbiologicalanalysis of the water of 21 Lima’s beaches and the detections of contamination sources with human feces. The results qualify the water of 33.33% (07) beaches as unacceptable if it is used as indicators of fecal pollution, the total coliforms and fecal coliforms; if it is included Escherichia coli, it reaches to 47.62% (10); and if also it is included Enterococcus it reaches to 66.66%(14). It was demonstrated the existence of domestic sewage discharge in all the beaches considered as unacceptable; in 35.75% (05) with visual inspection; in 14.29% (02) was observed water running with fecal pollution and in 50% (07) by the relation between E. coli and Enterococcus.

The aim of the study was to isolate and characterize E. coli O157: H7 from fresh ground beef obtained in different food markets. 195 samples were analyzed, for isolation and enumeration of E. coliwas used most probable number technique using multiple tubes, for the isolation and characterization of E. coliO157: H7 selective enrichment and biochemical analysis, characteristic colonies were confirmed serologically. To determine the presence of shigatoxin (stx1, stx2) and intimin (eaeA) was done with multiplex real time PCR and for enterohemolysin the hemolysis test. The 87.18% of the samples were positive for E. coliand 77.95% had a count greater than or equal to 50 NMP/g. Were obtained 3 (1.54%) strains of E. coliO157: H7, one stx1 +/stx2 +/eaeA - and enterohemolysin -, one stx1 +/stx2 -/eaeA + and enterohemolysin - and the other stx1 -/stx2 -/eaeA - and enterohemolysin +. Also obtained 4...

The aim of the study was to isolate and characterize E. coli O157: H7 from fresh ground beef obtained in different food markets. 195 samples were analyzed, for isolation and enumeration of E. coliwas used most probable number technique using multiple tubes, for the isolation and characterization of E. coliO157: H7 selective enrichment and biochemical analysis, characteristic colonies were confirmed serologically. To determine the presence of shigatoxin (stx1, stx2) and intimin (eaeA) was done with multiplex real time PCR and for enterohemolysin the hemolysis test. The 87.18% of the samples were positive for E. coliand 77.95% had a count greater than or equal to 50 NMP/g. Were obtained 3 (1.54%) strains of E. coliO157: H7, one stx1 +/stx2 +/eaeA - and enterohemolysin -, one stx1 +/stx2 -/eaeA + and enterohemolysin - and the other stx1 -/stx2 -/eaeA - and enterohemolysin +. Also obtained 4...

Consumption of transgenic foods constitutes a potential health risk. However, in Peru there is a lack of updated and reliable information on the presence of transgenics in food and on the relevant data on their labeling; in the same way about the food consumed by animals for supply, whose products are going to be ingested by humans. Objetive. To determine the transgenicity, through the detection of the 35S promoter, in industrialized corn food products for human and animal consumption, which are marketed in Lima and to verify if the labeling mentions whether or not it contains transgenic sequences. Methods. 30 food samples for human consumption and 10 for consumption by animals for production were analyzed; and the labeling was revised. The Dneasy Mericon Food kit was used for DNA extraction, the Real Time-PCR method for P35S detection using the Mericon Screen 35S kit, and the Mericon Qu...

Introducción. El consumo de alimentos industrializados que contienen organismos genéticamente modificados (OGM) se ha incrementado notablemente. Desde su inicio ha generado crecientes controversias debido a que se considera de riesgo para la salud. En Perú se carece de información científica sobre los OGM en alimentos industrializados. Objetivo. Detectar y cuantificar molecularmente los indicadores de transgenicidad P35S y TNOS, y la soya transgénica Roundup Ready en alimentos industrializados de soya; y verificar su mención en la etiqueta. Métodos. Analizamos 30 muestras, para extraer el ADN utilizamos los kits Dneasy Mericon Food y Dneasy Power Soil. Para la detección y cuantificación de las secuencias transgénicas usamos la técnica PCR en tiempo real con los kits Mericon. Resultados. Detectamos transgenicidad en el 100% de las muestras y soya Roundup Ready en el 66,7%. El ...