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Federico Villarreal National University (UNFV)
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Aldo Bazán-Ramírez; Néstor Miguel Velarde-Corrales; María Elena Rodríguez-Pérez; Jorge Guerrero-Barrios; +1 Authors

    <p style="text-align:justify">There are different strategies to analyze teacher and student performance when they interact with each other in class. The most used strategies are direct observation and verbal reports. Even though what is observed or reported depends on theoretical frameworks regarding didactic interactions, these must be related to teacher functions such as supervision, providing feedback, and evaluation of student performance. In this study, instruments for observational recording and verbal reports were developed and validated considering teacher functions and their student performance counterparts to compare the degree of correspondence or divergence between data gathered from both strategies. 135 students enrolled in a science class and their teachers participated. The class was taught in a public high school located in center/south Mexico. Classes were videotaped and the corresponding observational records were analyzed. Two months later, verbal reports were administered to students and teachers. Coincidences and differences that were found revealed that observer-observe interaction is conditioned by social norms. These results were interpreted considering the notion of silence as a communicative element.</p>

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ International Journa...arrow_drop_down
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    International Journal of Educational Methodology
    Article . 2022 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ International Journa...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      International Journal of Educational Methodology
      Article . 2022 . Peer-reviewed
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Carlos Scotto; Fernando Serna;

    In this paper the transgenic fluorescent red, orange and pink zebra fish (Danio rerio), found in local aquariums in Peru, were identified using the PCR technique to amplify the transgene RFP sea anemone belonging to Discosoma spp. The gene expression of the red fluorescent protein (RFP) transgene was found to determine different gradients-of-bioluminescence (shades in color) in each GMO fish analyzed. We performed sequence analysis of the two variants of the RFP along with six variants of the existing fluorescent protein GFP from the Genbank, this could help identify quickly if they are new genes or variants thereof as these novel fluorescent proteins may be introduced in aquatic GMO in the future. Thus, developing and improving biosecurity measures through its timely detection at the molecular genetic level. En el presente trabajo se identificó por primera vez peces Cebra transgénicos (Danio rerio) fluorescentes de color rojo, naranja y rosado introducidos al territorio peruano de acuarios locales utilizando la técnica de PCR para amplificar el transgen RFP perteneciente a la anémona marina Discosoma spp. Se encontró una expresión génica diferencial del transgen de la proteína fluorescente roja (RFP) que determinaría una gradiente de bioluminiscencia para cada color entre los peces OVM analizados. Se realizó un análisis de secuencias de las dos variantes de la RFP junto con las seis variantes de la GFP de proteínas fluorescentes existentes en el Genbank que podrían ayudar a identificar rápidamente si son nuevos genes o si son nuevas variantes de éstas proteínas fluorescentes y que podrían ser utilizadas en otros OVMs hidrobiológicos a futuro. De este modo, desarrollar y optimizar las medidas de bioseguridad mediante su oportuna detección a nivel genético molecular.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ LAReferencia - Red F...arrow_drop_down
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Scientia Agropecuaria
    Article . 2013 . Peer-reviewed
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    DOAJ
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    Scientia Agropecuaria
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Scientia Agropecuaria
    Article . 2013
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ LAReferencia - Red F...arrow_drop_down
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      Article . 2013 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Article . 2013
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      DOAJ
      Article . 2013
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Scientia Agropecuaria
      Article . 2013
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Chavarry Vallejos, Carlos Magno; Príncipe Bayona, Gisselle Isabel;

    El presente artículo tiene por objetivo aplicar las herramientas del Manual de Seguridad Vial, en la elaboración de Estudios de Inspección de Seguridad Vial, a fin de identificar los elementos susceptibles de mejora, evaluar sus deficiencias y recomendar las actuaciones por prioridad, para incrementar los niveles de seguridad vial de la infraestructura del Sistema Nacional de Carreteras (SINAC) del Perú. Los tramos de estudio tienen un total 202.00 km, donde entre los años 2015 y 2018 se han producido 563 accidentes, resultando 181 víctimas fatales y 1390 víctimas no fatales entre leves y graves. Las causas de estos siniestros viales fueron en un 61 % por colisiones y choques, 24% despistes y 15% atropellos, ocurriendo en gran medida en el horario de la madrugada. El análisis de la data de siniestros viales indica que, en un 93 % la causa principal se atribuye al factor humano, en 23 % al factor infraestructura y el 2% al factor vehículo. El IMDA promedio es de 53% vehículos pesados y 48% vehículos ligeros, cuyas velocidades oscilan entre 60 km/h y 90km/h, siendo el factor humano principal causa de los siniestros: la imprudencia del conductor, el exceso de velocidad e invasión del carril contrario. El tipo del estudio está enmarcado en descriptivo, correlacional y explicativo, de nivel descriptivo, con un diseño no experimental, transversal, prospectivo y el estudio de cohorte (causa-efecto). Entre los principales problemas identificados en relación con la infraestructura vial tenemos: discontinuidad e insuficientes sistemas de contención vehicular, accesos y salidas sin canalización, escasa longitud para cambios de velocidad, curvas con radios de curvaturas escasas, sobreanchos insuficientes, visibilidad deficiente y ubicación de accesos en tramos curvos, percepción deficiente de los dispositivos de control de tránsito, etc. El costo de inversión para el mejoramiento de los elementos susceptibles de mejora las que se encuentran en Tramos Potenciales Peligrosos (TPPs) asciende a S/.15,538,665.45 soles y en Tramos de Concentración de Accidentes (TCAs) asciende a S/. 41, 585,131.42 Soles, la suma total para la mejora en los cuatro tramos de estudio requiere un monto de S/. 57, 123,796.87 de Costo Directo, incluido Gastos Generales al 15.8%, con Utilidad de 10% y IGV al 18% se requeriría de S/. 83, 611,542.43 soles.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Pro Sciences: Revist...arrow_drop_down
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Pro Sciences: Revista de Producción Ciencias e Investigación
    Article . 2021 . Peer-reviewed
    License: CC BY NC ND
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      Pro Sciences: Revista de Producción Ciencias e Investigación
      Article . 2021 . Peer-reviewed
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Rosa Velasco Valderas; José Cuenca Alfaro;

    Se evaluó la capacidad discriminativa de tres instrumentos que tienen como objetivo identificar el deterioro cognitivo: Mini Mental Test de Folstein, MEC30 de LOBO y el Test de Detección Precoz de Alzheimer. Se aplicó a una muestra de 50 pacientes con diagnóstico clínico de demencia atendidos en un instituto especializado de Lima frente a un grupo control (50 sujetos normales). Los resultados indican que los tres instrumentos presentan diferencias significativas con un nivel de significación de 95%. La media del Mini Mental test de Folstein, de los grupos control y clínico fueron de 27.98 y 18.34 respectivamente. El test Mini Examen Cognoscitivo MEC30 de LOBO tuvo medias de GControl= 28.32 y GClínico= 15.12 y por último el test Detección precoz de Demencia por Enfermedad de Alzheimer (TDPD) obtuvo una media de GControl= 92.34 y GClínico= 82. Se concluye que existen diferencias significativas entre el grupo clínico y no clínico, lo cual sugiere que los tres instrumentos presentan capacidad discriminativa.Palabras clave: capacidad discriminativa, test de demencia, validez, deterioro cognitivo

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Cátedra Villarrealarrow_drop_down
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    Cátedra Villarreal
    Article . 2014 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Cátedra Villarrealarrow_drop_down
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      Cátedra Villarreal
      Article . 2014 . Peer-reviewed
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    Authors: José Iannacone;

    Se realizó una investigación cuantitativa de la fauna parasitaria del anfibio Atelopus bomolochus Peters 1973 (Bufonidae). treintaytres especímenes fueron colectados manualmente de las inmediaciones del río Seco (80° 9'22'' LW, 5° 5'19'' LS), en las cercanías de la localidad de Chulucanas, provincia de Morropón, departamento de Piura, Perú en octubre del 2000. En total se colectaron 7 especies y 13.268 especímenes. Veintyocho hospederos estuvieron parasitados (84,8 %). Trece hospederos (39,4 %) mostraron infección con 1 especie de parásito, seis (18,2 %), ocho (24,2 %) y uno (3,0 %) tuvieron 2, 3 y 4 especies de parásitos, respectivamente. Se encontraron siete especies de parásitos con las siguientes prevalencias de infección: Gorgoderina parvicava Travassos 1922 (Digenea) (6,1 %), Cylindrotaenia americana Jewell 1916 (Cestoda) (9,1 %), Batracholandros spectatus (Freitas & Ibáñez 1962) Freitas & Ibáñez 1965 (Nematoda) (33,3 %), Aplectana hylambatis (Baylis 1927) (6,1 %); Rhabdias sphaerocephala Goodey 1924 (Nematoda) (69,7 %), Capillaria sp. (Nematoda) (39,4 %) y Centrorhynchus sp. (Acantocephala) (3,0 %). B. spectatus fue la especie dominante (97,8 %). Sólo se encontró efecto de la longitud con la prevalencia de infección de R. sphaerocephala, una especie central. B. spectatus y Capillaria sp. fueron especies secundarias. G. parvicava, C. americana, A. hylambatis y Centrorhynchus sp. fueron especies satélites. Se discute la relación de la helmintofauna con A. bomolochus A quantitative research of parasitofauna of thirty-three anuran Atelopus bomolochus Peters 1973 collected from Seco river (80° 9'22'' LW, 5° 5'19'' LS), close to locality of Chulucanas, Province of Morropon, Department of Piura, Peru, in October 2000, was conducted. 13 268 specimens of parasites and seven species in total during all the survey were collected. 28 hosts were parasited (84.8 %). 13 hosts (39.4 %) showed infection with 1 parasite species, six (18.2 %), eight (24.2 %) and one (3,0 %) had two, three and four parasites species, respectively. Seven parasite species with the following prevalence of infections were found: Gorgoderina parvicava Travassos 1922 (Digenea) (6.1 %), Cylindrotaenia americana Jewell 1916 (Cestoda) (9.1 %), Batracholandros spectatus (Freitas & Ibáñez 1962) Freitas & Ibáñez 1965 (Nematoda) (33.3 %), Aplectana hylambatis (Baylis 1927) (Nematoda) (6.1 %), Rhabdias sphaerocephala Goodey 1924 (Nematoda) (69.7 %), Capillaria sp. (Nematoda) (39.4 %), Centrorhynchus sp. (Acantocephala) (3.0 %). B. spectatus was the dominant species (97.8 %). The effect of length with prevalence of infection of R. sphaerocephala, a core specie was found. B. spectatus and Capillaria sp. are secondary species. G. parvicava, C. americana, A. hylambatis and Centrorhynchus sp. are satellite species. The relationship of helminthes parasites with A. bomolochus is discussed

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      Gayana
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    Authors: Frame, Mary; Vallejo, Francisco; Ruales, Mario; Tosso, Walter;

    Un contexto funerario, excavado en 1982, en el sitio de Armatambo proporciona la base para describir el estilo de textiles Ychsma durante el Horizonte Tardío. Los datos textiles (tipos de prendas de vestir, la iconografía, la disposición de diseño, las fibras, las estructuras de tejido, hilos, colores, etc.) son suficientemente extensos para distinguir los tipos de textiles Ychsma con textiles de otros estilos, y para identificar textiles semejantes en colecciones de museos. La procedencia de los textiles Ychsma en las colecciones de los museos, es considerada para sugerir el ámbito de interacción de la cultura Ychsma en la costa central.

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    Arqueología y Sociedad
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    Arqueología y Sociedad
    Article . 2012 . Peer-reviewed
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      Arqueología y Sociedad
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    Authors: José Iannacone; Werther Fernando Fernández;

    Se realizó un estudio sobre el comportamiento poblacional de Aedes aegypti en su fase larvaria, para explicar sus fluctuaciones a través de tres indicadores entomológicos (IE) y su relación con los casos de dengue en la ciudad de Yurimaguas, Loreto, Perú. Se censaron las viviendas positivas a través de tres IE: {Índice de Infestación domiciliaria o también llamado Índice aédico (IA), Índice de recipientes (IR) e Índice de Breteau (IB)} y los tipos de recipientes más comunes en 11 zonas de la ciudad de Yurimaguas durante el 2000 al 2002. Se encontró que los tres IE presentaron diferencias entre las doce evalua-ciones realizadas durante el 2000 al 2002. En los tres IE se ha notado una tendencia a la disminución de Abril-2000 a Diciembre-2002. El IA disminuye en un 46,82%; el IR en un 67,29% y IB disminuye en 43,71%. Los casos de dengue registrados del 2000 al 2002 disminuyeron en 80,6%. No se observaron diferencias entre las 11 zonas de la ciudad para IA, IR e IB. Los IA, IB e IR estuvieron altamente correlacionados lineal y positivamente durante el periodo 2000 al 2002. Sólo el IA y los casos de dengue, se encuentran correlacionados linealmente. En algunas evaluaciones del 2000 al 2002 existieron diferencias significativas para el IR e IB entre las diez categorías de recipientes. Se notaron valores altos para las cuatro categorías siguientes: 10 (inservibles), 9 (florero y macetero), 6 (llantas), tres (barril, cilindro, sansón). Se evaluaron las variaciones de los IE durante los periodos secos y lluviosos A research about population behaviour of Aedes aegypti (L.) in its larval phase, to explain their fluctuations through three entomological indexes and their relationships with dengue cases in Yurimaguas city, Loreto, Peru was performed. Positive housing were surveyed through three Entomological Indexes (EI) {Index of Domiciliary Infestation or Housing Index or also named Aedic Index (AI), Container Index (CI) or Breteu Index (BI)} and the kind of container more common in 11 zones of Yurimaguas city (5°53'30'' L.S; 76°05'26'' L.O), Loreto, Peru during 2000 to 2002. The three entomological indexes showed differences between all twelve evaluations performed during 2000 to 2002. In the three EI had observed a tendency to decrease from April-2000 to December-2002. AI decreased in 46.82 %; CI in 67.29 % and IB decreases in 43.71 %. The cases of dengue registered among 2000 to 2002 decreased 80.6 %. None differences between 11 zones in Yurimaguas for AI, CI and BI were observed. The three EI: AI, BI and CI all had highly lineal correlation and positive during all period 2000 to 2002. Only in AI and dengue cases, were found lineal correlation. In some evaluations among 2000 to 2002 existed significantly differences between ten categories of containers in CI and BI. Higher values for the next four categories: 10 (useless), 9 (flower pot and flower pot stand), 6 (rubber tyre), three (barrel, cylinder, sanson) were observed. The variations of EI during wet and dry periods were evaluated

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    Parasitología latinoamericana
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    Parasitología latinoamericana
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      Parasitología latinoamericana
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      Parasitología latinoamericana
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  • Authors: Violeta L. Romero-Carrión; Rosalvina Campos-Pérez; Justo P. Solís-Fonseca; Juan Carlos Altamirano-Romero; +1 Authors
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    Authors: José Iannacone;

    A research of parasitefauna of 50 palm ruff Seriolella violacea Guichenot, 1816 from Ventanilla Fishmarket, Callao, Peru, between July and October 2001 and necropsied to study parasite infracommunities was conducted. Of the fishes collected, 21 were females and 29 males. Male showed a standard length between 21-95 cm (52.6 ± 24.9) and female between 18-96 cm (43.2 ± 21.1) and was not found differences between both sexes. 358 specimens of parasite were collected in total during all the survey, with a mean abundance of 7.2 ± 3.2 (2-18). The mean parasite species richness 1.2 (1-3) was not correlated with standard body length. All hosts were parasited. Forty-two hosts (84%) showed infection with 1 parasite species, and eight (16%) had 2 parasite species. Three parasite species: Paraeurysorchis sarmientoi (Tantaleán, 1974) (Monogenea) (Prevalence = 14%, mean Intensity = 1, mean abundance = 0.14), Neobothriocephalus aspinosus Mateo & Bullock, 1966 (Cestoda) (Prevalence = 100%; mean Intensity = 7.02, mean abundance = 7.02) and Lernanthropus trachuri (Brian, 1903) (Copepoda) (Prevalence = 2%, mean Intensity = 1, mean abundance = 0.02) were found. Neobothriocephalus aspinosus had an overdispersed distribution and was the dominant species. An effect of sex and standard length with prevalence and mean abundance of infection of P. sarmientoi and N. aspinosus were not found. Paraeurysorchis sarmientoi showed the most prevalence of infection in the second gill-arch. Finally, we included a complete list of all metazoan parasites of S. violacea reported from Peru.

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    Revista Brasileira de Zoologia
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    Revista Brasileira de Zoologia
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Revista Brasileira d...arrow_drop_down
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      Revista Brasileira de Zoologia
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      Revista Brasileira de Zoologia
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Wendy León Lescano;

    La presente investigación tuvo como objetivo determinar el nivel de adicción a Internet en estudiantes de un instituto tecnológico en el distrito de Chosica, según su edad, estado civil y género. La población estuvo integrada por 407 estudiantes de ambos sexos; en edades comprendidas entre los 15 y 39 años. Se trabajó con una muestra censal. Se aplicó la prueba de Kimberly Young “Test Adicción a Internet”, instrumento que permite valorar las dimensiones de obsesión, dependencia y deterioro. Esta prueba tiene un nivel de confiabilidad de a = 0,867. Los resultados obtenidos indican que el 74% de la población estudiada presentan un nivel bajo de adicción; el 22% un nivel medio a la adicción y el 4% muestra un nivel alto de adicción. En cuanto al estado civil, los casados tienen un porcentaje nulo (0%) en el uso de internet, no creándoles adicción, a diferencia de los solteros que utilizan Internet con una mayor frecuencia; además esta población tiene un 2% de adicción al uso de Internet. No se ha detectado adicción a Internet en estudiantes comprendidos entre los 20 a 40 años de edad, a diferencia del 7% de los estudiantes entre las edades de 15 a 20 años que tiene adicción a Internet. En cuanto a género son las mujeres quienes no presentan adicción a internet; en cambio el 2% de los varones presentan una adicción a Internet. Palabras Clave: Adicción, Internet, Tecnología, Dependencia.

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Federico Villarreal National University (UNFV)
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Aldo Bazán-Ramírez; Néstor Miguel Velarde-Corrales; María Elena Rodríguez-Pérez; Jorge Guerrero-Barrios; +1 Authors

    <p style="text-align:justify">There are different strategies to analyze teacher and student performance when they interact with each other in class. The most used strategies are direct observation and verbal reports. Even though what is observed or reported depends on theoretical frameworks regarding didactic interactions, these must be related to teacher functions such as supervision, providing feedback, and evaluation of student performance. In this study, instruments for observational recording and verbal reports were developed and validated considering teacher functions and their student performance counterparts to compare the degree of correspondence or divergence between data gathered from both strategies. 135 students enrolled in a science class and their teachers participated. The class was taught in a public high school located in center/south Mexico. Classes were videotaped and the corresponding observational records were analyzed. Two months later, verbal reports were administered to students and teachers. Coincidences and differences that were found revealed that observer-observe interaction is conditioned by social norms. These results were interpreted considering the notion of silence as a communicative element.</p>

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    International Journal of Educational Methodology
    Article . 2022 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ International Journa...arrow_drop_down
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      International Journal of Educational Methodology
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Carlos Scotto; Fernando Serna;

    In this paper the transgenic fluorescent red, orange and pink zebra fish (Danio rerio), found in local aquariums in Peru, were identified using the PCR technique to amplify the transgene RFP sea anemone belonging to Discosoma spp. The gene expression of the red fluorescent protein (RFP) transgene was found to determine different gradients-of-bioluminescence (shades in color) in each GMO fish analyzed. We performed sequence analysis of the two variants of the RFP along with six variants of the existing fluorescent protein GFP from the Genbank, this could help identify quickly if they are new genes or variants thereof as these novel fluorescent proteins may be introduced in aquatic GMO in the future. Thus, developing and improving biosecurity measures through its timely detection at the molecular genetic level. En el presente trabajo se identificó por primera vez peces Cebra transgénicos (Danio rerio) fluorescentes de color rojo, naranja y rosado introducidos al territorio peruano de acuarios locales utilizando la técnica de PCR para amplificar el transgen RFP perteneciente a la anémona marina Discosoma spp. Se encontró una expresión génica diferencial del transgen de la proteína fluorescente roja (RFP) que determinaría una gradiente de bioluminiscencia para cada color entre los peces OVM analizados. Se realizó un análisis de secuencias de las dos variantes de la RFP junto con las seis variantes de la GFP de proteínas fluorescentes existentes en el Genbank que podrían ayudar a identificar rápidamente si son nuevos genes o si son nuevas variantes de éstas proteínas fluorescentes y que podrían ser utilizadas en otros OVMs hidrobiológicos a futuro. De este modo, desarrollar y optimizar las medidas de bioseguridad mediante su oportuna detección a nivel genético molecular.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ LAReferencia - Red F...arrow_drop_down
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    Scientia Agropecuaria
    Article . 2013 . Peer-reviewed
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ LAReferencia - Red F...arrow_drop_down
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    Authors: Chavarry Vallejos, Carlos Magno; Príncipe Bayona, Gisselle Isabel;

    El presente artículo tiene por objetivo aplicar las herramientas del Manual de Seguridad Vial, en la elaboración de Estudios de Inspección de Seguridad Vial, a fin de identificar los elementos susceptibles de mejora, evaluar sus deficiencias y recomendar las actuaciones por prioridad, para incrementar los niveles de seguridad vial de la infraestructura del Sistema Nacional de Carreteras (SINAC) del Perú. Los tramos de estudio tienen un total 202.00 km, donde entre los años 2015 y 2018 se han producido 563 accidentes, resultando 181 víctimas fatales y 1390 víctimas no fatales entre leves y graves. Las causas de estos siniestros viales fueron en un 61 % por colisiones y choques, 24% despistes y 15% atropellos, ocurriendo en gran medida en el horario de la madrugada. El análisis de la data de siniestros viales indica que, en un 93 % la causa principal se atribuye al factor humano, en 23 % al factor infraestructura y el 2% al factor vehículo. El IMDA promedio es de 53% vehículos pesados y 48% vehículos ligeros, cuyas velocidades oscilan entre 60 km/h y 90km/h, siendo el factor humano principal causa de los siniestros: la imprudencia del conductor, el exceso de velocidad e invasión del carril contrario. El tipo del estudio está enmarcado en descriptivo, correlacional y explicativo, de nivel descriptivo, con un diseño no experimental, transversal, prospectivo y el estudio de cohorte (causa-efecto). Entre los principales problemas identificados en relación con la infraestructura vial tenemos: discontinuidad e insuficientes sistemas de contención vehicular, accesos y salidas sin canalización, escasa longitud para cambios de velocidad, curvas con radios de curvaturas escasas, sobreanchos insuficientes, visibilidad deficiente y ubicación de accesos en tramos curvos, percepción deficiente de los dispositivos de control de tránsito, etc. El costo de inversión para el mejoramiento de los elementos susceptibles de mejora las que se encuentran en Tramos Potenciales Peligrosos (TPPs) asciende a S/.15,538,665.45 soles y en Tramos de Concentración de Accidentes (TCAs) asciende a S/. 41, 585,131.42 Soles, la suma total para la mejora en los cuatro tramos de estudio requiere un monto de S/. 57, 123,796.87 de Costo Directo, incluido Gastos Generales al 15.8%, con Utilidad de 10% y IGV al 18% se requeriría de S/. 83, 611,542.43 soles.

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