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Vol. 10 No. 2 (2018)
Vol. 10 No. 2 (2018)
December 2018
Published:
2018-09-21
Articles
First pages
UNED Research Journal
233-240
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DOI:
https://doi.org/10.22458/urj.v10i2.2165
New model for Physics tutorials and its effect on student performance at a distance university in Costa Rica
Diana Herrero Villareal, Yency Calderón Badilla, Carmen Andrés Jiménez
241-246
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DOI:
https://doi.org/10.22458/urj.v10i2.2155
Competency level of teachers in the Agroindustry chair in a distance university
Carmen Andrés Jiménez, Jacqueline Alfaro Azofeifa
247-256
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DOI:
https://doi.org/10.22458/urj.v10i2.2156
Use of industrial waste in prenursery stage of oil palm (Elaeis guineensis, Arecaceae) production: growth and nutrient uptake
Ángel Madrigal-Valverde, Gabriel Garbanzo-León
257-266
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DOI:
https://doi.org/10.22458/urj.v10i2.2157
Distribution and seasonal abundance of Anopheline mosquitoes and their association with rainfall around irrigation and non-irrigation areas in Nigeria
Ebube Charles Amaechi, Onyinye Mkpola Ukpai, Carmelita Chima Ohaeri, Uzoamaka Blessing Ejike, Ozioma Prisca Irole-Eze, Onyekachi Egwu, Chidiogo Comfort Nwadike
267-272
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DOI:
https://doi.org/10.22458/urj.v10i2.2158
Histopathological markers of environmental stress in the fish Odonthestes bonariensis (Atheriniformes, Atherinopsidae) in two reservoirs of Argentina
Oscar Leone, Soledad Valdecantos, Virginia Martínez
273-282
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DOI:
https://doi.org/10.22458/urj.v10i2.1909
A velvet worm (Onychophora: Peripatidae) feeding on a free ranging spider in Sierra Llorona, Panama
Macario González, Ángel Sosa-Bartuano, Julián Monge-Nájera
283-284
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DOI:
https://doi.org/10.22458/urj.v10i2.2159
In vivo enzyme activity and induction of DNA damage in Swiss albino male mice by automobile waste leachate
Abass Toba Anifowoshe, Oluyinka Ajibola Iyiola, Temitope Fatima Olafimihan, Segun Olayinka Oladipo, Sunday Frank Yakubu, Thuwaibat Oyiyoza Abubakar, Rukayat Ifedolapo Bakare, Kehinde Monica Akinseye, Faoziyat Adenike Sulaiman
285-295
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DOI:
https://doi.org/10.22458/urj.v10i2.1938
The genus Liocanthydrus in Venezuela (Coleoptera: Noteridae) with description of two new species
Mauricio M. García R., Jesús A. Camacho M., Nedy C. Poleo S.
296-303
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DOI:
https://doi.org/10.22458/urj.v10i2.2161
The genus Crenitulus in Venezuela (Hydrophilidae: Chaetarthriinae: Anacaenini) with description of twelve new species
Mauricio M. García R.
304-329
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DOI:
https://doi.org/10.22458/urj.v10i2.2162
Bio-optimization of compost with cultures of mountain microorganisms (MM) and digested sludge from bio-digester (LDBIO)
Fabricio Camacho Céspedes, Lidieth Uribe Lorío, Quint Newcomer, Karen Masters, Maureen Kinyua
330-341
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DOI:
https://doi.org/10.22458/urj.v10i2.2163
Aula en el Bosque, an environmental education program for the Costa Rican tropical forest: effect on students and teacher opinions
Esteban Salazar-Acuña, Yesenia López-García
342-352
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DOI:
https://doi.org/10.22458/urj.v10i2.2164
Maize landraces of Guanacaste, Costa Rica: grain characterization
Patricia Oreamuno Fonseca, José Eladio Monge Pérez
353-361
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DOI:
https://doi.org/10.22458/urj.v10i2.1956
Absence of a molecular structural effect on the thermodynamic properties of several biodiesel materials
Hermes R. Alvarado-Montero, Carmen Monge-Montero, María Sol Vargas, Giselle Lutz, Julio F. Mata-Segreda
362-367
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DOI:
https://doi.org/10.22458/urj.v10i2.1988
Morphogenetic responses of cuttings and in vitro plants of Vanilla planifolia (Orchidaceae) during initial development in greenhouse and agroforestry systems
José Bernal Azofeifa Bolaños, German Rivera Coto, Amelia Paniagua Vásquez, Roberto Cordero Solórzano
368-378
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DOI:
https://doi.org/10.22458/urj.v10i2.1995
Distribution and abundance of mosquito larvae in Ohafia, Abia State, Nigeria
Onyekachi Egwu, Carmelita C. Ohaeri, Ebube C. Amaechi, Collins N. Ehisianya
379-385
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DOI:
https://doi.org/10.22458/urj.v10i2.2166
Predation of the scorpion Centruroides bicolor by the Scorpion Eater Snake, Stenorrhina degenhardtii (Squamata: Dipsadidae).
Alejandro Solórzano
386
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DOI:
https://doi.org/10.22458/urj.v10i2.2167
Quantification by atomic absorption of Cu, Fe and Zn in distilled alcohol and water
Esteban Pérez López, Diana Carlina Alvarado Rodriguez
387-396
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DOI:
https://doi.org/10.22458/urj.v10i2.1998
Composition of the community, population structure, reproductive status and habitat use of rodents in a poultry farm in Costa Rica
Javier Monge, Carol Sánchez
397-403
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DOI:
https://doi.org/10.22458/urj.v10i2.2168
First record of the highfin goby Gobionellus oceanicus (Gobiiformes: Gobiidae) in Costa Rican freshwaters
Francisco S. Álvarez, Derick Herrerea, Arturo Angulo
404-408
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DOI:
https://doi.org/10.22458/urj.v10i2.2169
Pollution and reduction of the El Laguito reservoir, Costa Rica, by urban waters: survey and physical-chemical properties
María José Chassoul Acosta, Cindy Rodríguez Arias
409-415
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DOI:
https://doi.org/10.22458/urj.v10i2.2006
Optimal time and dose of fluoxymesterone, for masculinization of Mayan fish Cichlasoma urophthalmus (Percidae: Cichlidae)
Irma Gutiérrez-Sigueros, Carlos A. Cuenca-Soria, Leonardo I. Navarro-Angulo, Emilio J. Maldonado-Enríquez, Carolina E. Melgar-Valdes, Alfonso Castillo-Domínguez
416-421
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DOI:
https://doi.org/10.22458/urj.v10i2.2170
Production and reproduction of cows; Holstein, Jersey and their crossbreed, in five locations of Costa Rica
Jose Pablo Gonzáles Blanco, Rodolgo WingChing-Jones
422-427
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DOI:
https://doi.org/10.22458/urj.v10i2.2171
Herd structure, and nutritional, sanitary, reproductive and environmental management of Iberoamerican horses in Costa Rica.
Grethel Solano Mora, Rodolfo WingChing-Jones
428-434
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DOI:
https://doi.org/10.22458/urj.v10i2.2172
A wildfires vulnerability model for Guanacaste Conservation Area, Costa Rica
Daniela Vargas-Sanabria, Carlos Campos-Vargas
435-446
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DOI:
https://doi.org/10.22458/urj.v10i2.2173
Neighbors’ opinion on the use of a farm acquired by a public university for socio-environmental purposes: the case of Los Llanos, Costa Rica
Verónica Bonilla Villalobos
447-454
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DOI:
https://doi.org/10.22458/urj.v10i2.2174
Impact and biorefinery opportunities for agricultural waste of the cultivation of pineapple (Ananas comosus) in Costa Rica
Rodolfo Antonio Hernández Chaverri, Lilia Arely Prado Barragán
455-468
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DOI:
https://doi.org/10.22458/urj.v10i2.2059
Antimicrobial activity evaluation of residual orange oil
Dolores Castañeda-Antonio, Antonio Rivera-Tapia, Esther Choy Flores, Ricardo Munguía-Pérez, Roberto Portillo-Reyes, Jesús Muñoz
469-474
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DOI:
https://doi.org/10.22458/urj.v10i2.2175
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