Vol. 35 No. 2 (2021): Uniciencia. July-December, 2021

Published: 2021-07-31

Original scientific papers (evaluated by academic peers)

  • Effect of two surfactants on in vitro permeation of butorphanol through horse nasal mucosa

    María Inés Velloso, Héctor Alfredo Andreeta, María Fabiana Landoni (Author)
    1-9
    DOI: https://doi.org/10.15359/ru.35-2.1

  • Optimization of larval culture for the production of juvenile spotted snapper Lutjanus guttatus in Costa Rica

    Jonathan Chacón-Guzmán, Milagro Carvajal-Oses, Ángel Herrera-Ulloa (Author)
    1-17
    DOI: https://doi.org/10.15359/ru.35-2.2

  • Multitemporal analysis of plant associations and land use changes in a high Andean locality, Puno-Peru

    Alfredo Loza-Del-Carpio, Irene Taype-Huamán (Author)
    1-19
    DOI: https://doi.org/10.15359/ru.35-2.3

  • Bacterial pathogens and their antimicrobial resistance in tilapia culture in Guatemala

    Josué García-Pérez, Juan B. Ulloa-Rojas, Susana Mendoza-Elvira (Author)
    1-14
    DOI: https://doi.org/10.15359/ru.35-2.4

  • Preliminary inventory of atmospheric emissions (SO2, NOx and TSP) from different industrial sectors in Costa Rica

    Daniel Alfaro-Alfaro, Luis Salas-Morelli, Bryan Sánchez-Mejías, José Mora-Barrantes, José Pablo Sibaja-Brenes, Henry Borbón-Alpízar (Author)
    1-13
    DOI: https://doi.org/10.15359/ru.35-2.5

  • Changes in land cover in coastal erosion hotspots in the southern Caribbean of Costa Rica during the period 2005-2017

    Luis Sandoval-Murillo, Gustavo Barrantes-Castillo (Author)
    1-23
    DOI: https://doi.org/10.15359/ru.35-2.6

  • Effect of a Wind Lens diffuser on turbulent flow

    Gustavo Richmond-Navarro, Pedro Casanova-Treto, Franklin Hernández-Castro (Author)
    1-15
    DOI: https://doi.org/10.15359/ru.35-2.7

  • Nesting of arboreal ants (Hymenoptera: Formicidae) in artificial substrates in coffee plantations in the Colombian Andes

    Andrés Jireh López-Dávila, Selene Escobar-Ramírez, Inge Armbrecht (Author)
    1-17
    DOI: https://doi.org/10.15359/ru.35-2.13

  • Origin of color variations of thin, nano-sized layers of volcanic cinder from the Sierra Negra Volcano of the Galapagos Islands

    Alexis Debut, Theofilos Toulkeridis, Andrea V. Vaca, Carlos R. Arroyo (Author)
    1-13
    DOI: https://doi.org/10.15359/ru.35-2.14

  • Socio-environmental aspects affecting water contamination in an urban area

    Rolando Sánchez-Gutiérrez, Carolina Alfaro-Chinchilla, Kimberly Ledezma-Zamora, Ligia Hernando-Echeverría, Carmen Mora-Aparicio, Roy Pérez-Salazar (Author)
    1-20
    DOI: https://doi.org/10.15359/ru.35-2.20

  • Workload in a group of Latin American teachers during the COVID-19 pandemic

    Leonardo Flavio Medina-Guillen, Gustavo Jared Quintanilla-Ferrufino, Margarita Palma-Vallejo, Mónica Fernanda Medina Guillen (Author)
    1-13
    DOI: https://doi.org/10.15359/ru.35-2.15

  • An approach to didactic-mathematical knowledge of future Basic Education teachers to teach elementary mathematics

    Nataly Pincheira, Claudia Vásquez, Belen Giacomone (Author)
    1-18
    DOI: https://doi.org/10.15359/ru.35-2.8

  • Comparing probabilities in urns: A study with primary school students

    Luis Armando Hernández-Solís, Carmen Batanero, María M. Gea, Rocío Álvarez-Arroyo (Author)
    1-18
    DOI: https://doi.org/10.15359/ru.35-2.9

  • Knowledge of preservice elementary teachers on fractions

    Elena Castro-Rodríguez, Luis Rico (Author)
    1-17
    DOI: https://doi.org/10.15359/ru.35-2.10

  • Pedagogical effectiveness in the school organizational culture and the professional learning community

    Derling José Mendoza Velazco, Magda Francisca Cejas Martínez, Mercedes Navarro Cejas, Elizeth Mayrene Flores Hinostroza, Karina Maribel Castillo Pinos (Author)
    1-15
    DOI: https://doi.org/10.15359/ru.35-2.11

  • Competencies of pre-service mathematics teachers when transforming the representations of a function

    Tulio Amaya De Armas, Arjuna Gabriel Castellanos, Luis Roberto Pino-Fan (Author)
    1-15
    DOI: https://doi.org/10.15359/ru.35-2.12

  • Structures in direct and inverse forms of a function evidenced by 7–8-year-old students

    María D. Torres, María C. Cañadas, Antonio Moreno, Pedro Gómez (Author)
    1-16
    DOI: https://doi.org/10.15359/ru.35-2.16

  • Argument schemes of high school students when using GeoGebra in the context of tessellations

    Guadalupe Morales Ramírez, Víctor Larios Osorio, Norma Rubio Goycochea (Author)
    1-18
    DOI: https://doi.org/10.15359/ru.35-2.17

  • Analysis of definitions of limit provided by University students

    Yosenith González-Flores, Ana Belén Montoro-Medina, Juan Francisco Ruiz-Hidalgo (Author)
    1-20
    DOI: https://doi.org/10.15359/ru.35-2.18

  • Suitability criteria used by future primary school teachers in the assessment of math educational videos

    María Burgos Navarro, María José Castillo Céspedes (Author)
    1-17
    DOI: https://doi.org/10.15359/ru.35-2.19

  • Norms that regulate the management of virtual mathematics classes in the COVID-19 context

    Cristina N. Peña, Luis R. Pino-Fan, Adriana Assis (Author)
    1-20
    DOI: https://doi.org/10.15359/ru.35-2.21