Producción Científica UPeU

URI permanente para esta comunidadhttps://cris.upeu.edu.pe/handle/123456789/1

Examinar

Ajustes

Fecha de inicio: 2010Fecha de finalización: 2019

Resultados de la búsqueda

Mostrando 1 - 10 de 236
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    Mitochondrial genome of the Peruvian scallop<i>Argopecten purpuratus</i>(Bivalvia: Pectinidae)
    (2014-01-07)
    ;
    R. Alfaro
    ;
    Takafumi Fujimoto
    ;
    Katsutoshi Arai
    The mitochondrial genome of the Peruvian scallop Argopecten purpuratus was determined. The length of the mitochondrial coding region is 15,608 bp. A typical bivalve mitochondrial composition was detected with 12 protein-coding genes, 2 ribosomal RNA genes and 21 transfer RNA genes, with the absence of the atp8 gene. Fifty percent of the protein-coding genes use typical ATG start codon, whereas five genes utilize ATA as their start codon. Only one gene was found to utilize TTG as its start codon. The A. purpuratus mitogenome shows a significant similarity to that of A. irradians irradians, in length as well as in gene composition.
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    A glimpse into the genetic diversity of the Peruvian seafood sector: Unveiling species substitution, mislabeling and trade of threatened species
    (2018-11-16)
    ;
    José Serna
    ;
    Christian Robles
    ;
    Beder Ramírez
    ;
    Lorenzo E. Reyes‐Flores
    Peru is one of the world's leading fishing nations and its seafood industry relies on the trade of a vast variety of aquatic resources, playing a key role in the country's socio-economic development. DNA barcoding has become of paramount importance for systematics, conservation, and seafood traceability, complementing or even surpassing conventional identification methods when target organisms show similar morphology during the early life stages, have recently diverged, or have undergone processing. Aiming to increase our knowledge of the species diversity available across the Peruvian supply chain (from fish landing sites to markets and restaurants), we applied full and mini-barcoding approaches targeting three mitochondrial genes (COI, 16S, and 12S) and the control region to identify samples purchased at retailers from six departments along the north-central Peruvian coast. DNA barcodes from 131 samples were assigned to 55 species (plus five genus-level taxa) comprising 47 families, 24 orders, and six classes including Actinopterygii (45.03%), Chondrichthyes (36.64%), Bivalvia (6.87%), Cephalopoda (6.11%), Malacostraca (3.82%), and Gastropoda (1.53%). The identified samples included commercially important pelagic (anchovy, bonito, dolphinfish) and demersal (hake, smooth-hound, Peruvian rock seabass, croaker) fish species. Our results unveiled the marketing of protected and threatened species such as whale shark, Atlantic white marlin, smooth hammerhead (some specimens collected during closed season), shortfin mako, and pelagic thresher sharks. A total of 35 samples (26.72%) were mislabeled, including tilapia labeled as wild marine fish, dolphinfish and hake labeled as grouper, and different shark species sold as "smooth-hounds". The present study highlights the necessity of implementing traceability and monitoring programs along the entire seafood supply chain using molecular tools to enhance sustainability efforts and ensure consumer choice.
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    Metabolic Pathways of Alcohol in the Liver
    (2015-04-16)
    ;
    Hern�n Iturriaga
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    Capacity Building Models Through Distance Education
    (2014-01-01)
    ;
    Marcia Ortega
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    La Matriz de Variables (La MAVA): Brújula en la elaboración de proyectos de investigación
    (2016-02-04)
    La dificultad para elaborar proyectos de investigacion radica mayormente en el manejo escaso de la informacion teorica sistematica sobre la secuencia del proceso de investigacion.  El presente tiene el objetivo  de proponer La Matriz de Variables (La MAVA), como una brujula para la elaboracion de proyecto de investigacion, que muy bien podria ser utilizada  para mejorar la ensenanza en las asignaturas de investigacion, asi como para facilitar el desarrollo de investigaciones generadas para obtener el titulo profesional o un grado aca-demico.  Una vez establecido el tema de investigacion, hay que determinar las variables, al mismo tiempo el tipo de investigacion. La elaboracion de La MAVA de la investigacion, con sus respectivas dimensiones, indicadores e indices es de primordial importancia; teniendo correctamente definidas las variables, dimensiones e indicadores, es casi imposible que  la investigacion  pierda su orientacion, porque estan presentadas y abordadas en toda la investigacion, desde la escritura del titulo hasta la redaccion de las conclusiones. Es importante entender que dicha matriz de variables e indicadores se elabora teniendo en cuenta la ramificacion de las variables. La matriz de variables sirve de brujula (mejor termino usado para su cometido), derrotero y guia para la elaboracion del proyecto de investigacion; de esa forma, el investigador  no se desviara ni a izquierda ni a derecha. Viendo el caso practico de la elaboracion de la descripcion del problema, la matriz de variables sirve de guia, porque solo se debe describir en funcion de las variables, dimensiones e indicadores y asi tambien cada parte del proyecto de investigacion.
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    Análisis de los factores y su relación con la informalidad de los comerciantes del mercado N° 3–Huayco, de la ciudad de Tarapoto
    (2016-09-19)
    Rosita Almendra Rojas Arévalo
    ;
    La presente investigacion tiene como objetivo: determinar como se relacionan los factores con la informalidad de los comerciantes del mercado N° 3 – Huayco, de la ciudad de Tarapoto 2015. El presente estudio es de tipo correlacional de corte transversal, de diseno no experimental. Se concluyo que la relacion de los factores con dificultad sectorial, sustenta que a mayor nivel de condicion social aceptable, mejores relaciones afectivas, mayor generacion de confianza social y mayor comunicacion afectiva, menor sera la dificultad sectorial.
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    Factores que se relacionan con la evasión tributaria de los comerciantes acogidos al Nuevo RUS del mercado "El Huequito", Tarapoto, 2015
    (2016-09-19)
    Betty Giovelith Jiménez Pérez
    ;
    La presente tematica pretende determinar en que medida los factores se relacionan con la evasion tributaria de los comerciantes acogidos al Nuevo RUS del mercado “El Huequito”, Tarapoto, 2015, mediante un tipo de investigacion correlacional y diseno no experimental. Se uso un cuestionario como instrumento de investigacion y la encuesta como tecnica de estudio, la misma fue aplicada a 64 comerciantes. De este modo, se llego a obtener que la medida de relacion entre los factores con el desconocimiento de las normas tributarias, desconocimientos de los procesos tributarios y la obtencion de beneficios propios en los comerciantes del mercado El Huequito, es 49.6%, 35.1% y 50.7%, respectivamente. En tal sentido, la medida de relacion que existe entre los factores y la evasion tributaria de los comerciantes del mercado “El Huequito” de Tarapoto 2016 es 44.4%.
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    Screening Genetic Resources of Capsicum Peppers in Their Primary Center of Diversity in Bolivia and Peru
    (2015-09-24)
    ;
    Marleni Ramirez
    ;
    David E. Williams
    ;
    Michael Petz
    ;
    Sven W. Meckelmann
    For most crops, like Capsicum, their diversity remains under-researched for traits of interest for food, nutrition and other purposes. A small investment in screening this diversity for a wide range of traits is likely to reveal many traditional varieties with distinguished values. One objective of this study was to demonstrate, with Capsicum as model crop, the application of indicators of phenotypic and geographic diversity as effective criteria for selecting promising genebank accessions for multiple uses from crop centers of diversity. A second objective was to evaluate the expression of biochemical and agromorphological properties of the selected Capsicum accessions in different conditions. Four steps were involved: 1) Develop the necessary diversity by expanding genebank collections in Bolivia and Peru; 2) Establish representative subsets of ~100 accessions for biochemical screening of Capsicum fruits; 3) Select promising accessions for different uses after screening; and 4) Examine how these promising accessions express biochemical and agromorphological properties when grown in different environmental conditions. The Peruvian Capsicum collection now contains 712 accessions encompassing all five domesticated species (C. annuum, C. chinense, C. frutescens, C. baccatum, and C. pubescens). The collection in Bolivia now contains 487 accessions, representing all five domesticates plus four wild taxa (C. baccatum var. baccatum, C. caballeroi, C. cardenasii, and C. eximium). Following the biochemical screening, 44 Bolivian and 39 Peruvian accessions were selected as promising, representing wide variation in levels of antioxidant capacity, capsaicinoids, fat, flavonoids, polyphenols, quercetins, tocopherols, and color. In Peru, 23 promising accessions performed well in different environments, while each of the promising Bolivian accessions only performed well in a certain environment. Differences in Capsicum diversity and local contexts led to distinct outcomes in each country. In Peru, mild landraces with high values in health-related attributes were of interest to entrepreneurs. In Bolivia, wild Capsicum have high commercial demand.
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,
    Cambios curriculares, un reto para las unidades académicas
    (2019-07-18)
    El actual entorno de autoevaluación y acreditación requiere que las universidades con sus unidades académicas fortalezcan el proceso de cambio curricular, en aras de construir una organización que se adapta proactivamente a los cambios del micro y macro entorno. Es aquí donde surge la necesidad que una organización desarrolle un clima organizacional de cambio con docentes y estudiantes motivados para lograr el objetivo común.
  • Publicacion
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publicación,