Mostrando ítems 21-40 de 4545

    • De los obstáculos... a oportunidades 

      Oficina de Comunicación y Mercadeo, Instituto Tecnológico de Costa Rica (2017)
      Este artículo habla sobre las medidas que como país se deben tomar en cuestiones de biomedicina entre entes públicos y privados para recupara el terreno perdido años atrás en Costa Rica.
    • Biomedicina: un reto nacional 

      Oficina de Comunicación y Mercadeo, Instituto Tecnológico de Costa Rica (2017)
      Este artículo habla de las investigaciones clínicas, ya que, han estado en el ojo de la tormenta. Sin embargo, se dice que la investigación científica es necesaria para un mayor desarrollo y crecimiento en todos los ámbitos ...
    • Profesionalización docente 

      Lira-Valdivia, Rosa Inés (1999-04)
      Este trabajo tiene Como Objetivo analizar la información obtenida del cuestionario "Profesionalización actualización docente" en la Escuela de Agronomía y en la Escuela de Ciencias y Letras de la Sede Regional de San Carlos ...
    • Cobra Real 

      Murillo, Álvaro (2014)
      El tema de este recurso es la locomoción animal de la cobra real. Se trata de un interactivo para que el usuario pueda entender cómo se desplaza este animal.
    • Fundamentos del Curriculo 

      Lira-Valdivia, Rosa Inés (2011-06)
      Introducción La disposición de cambio hacia la modernidad académica y social, obliga a visualizar el conocimiento curricular de manera articulada y coherente con la investigación, la realidad imperante de la educación ...
    • Micropropagación de teca (Tectona grandis L.f) 

      Abdelnour-Esquivel, Ana; Muñoz, Anabelle (2005)
      Micropropagation of teak (Tectona grandis L.f.). Teak (Tectona grandis L.f.) is considered valuable due to the quality of its wood. The world level demand for the wood supported the establishment of commercial plantations. ...
    • Canguro Rojo 

      Coto-Calderón, Ivonne (2014)
      El tema de este recurso es la locomoción animal del canguro rojo. Se trata de un interactivo para que el usuario pueda entender cómo se desplaza este animal.
    • Estudios preliminares para la crioconservación de especies forestales arbóreas 

      Abdelnour-Esquivel, Ana; Rojas, G; Alfaro, U (2007)
      La crioconservación presenta numerosas ventajas con respecto a otras técnicas que se utilizan rutinariamente para la conservación y almacenamiento de germoplasma. Algunas de estas ventajas son los bajos costos de labor ...
    • Conservación in vitro de chayote (Sechium edule) 

      Alvarenga-Venutolo, Silvana; Abdelnour-Esquivel, Ana; Villalobos-Aránbula, Víctor (2007)
      In vitro conservation of chayote (Sechium edule). The in vitro medium-term conservation technique was assayed on chayote. Survival was assayed after the addition of high concentration of sucrose (0, 30, 50, 60, 70 y 80 ...
    • Genetic Characterization of chayote, Sechium edule (Jacq) Swartz, in Costa Rica by using isozyme markers 

      Abdelnour-Esquivel, Ana; Rocha, Oscar (2007)
      We established protocols for the analysis of genetic diversity in chayote (Sechium edule) by using isozyme markers, thereby determining the level of genetic diversity present in 42 accessions of chayote from Costa Rica. ...
    • Evaluation of biodeterioration and the dynamic modulus of elasticity of wood in ten fast-growing tropical species in costa rica exposed to field testing 

      Moya-Roque, Roger (Statny Drevarsky Vyskumny Ustav, 2015)
      In tropical regions, it is possible to produce a large variety of timber species in plantation conditions. However, wood from these trees has low natural durability. Biodeterioration and the dynamic modulus of elasticity ...
    • Environmental gradients and the evolution of successional habitat specialization: A test case with 14 Neotropical forest sites 

      Quesada-Monge, Ruperto; Letcher, Susan G.; Lasky, Jesse R; Chazdon, Robin L; Norden, Natalia; Wright, Joseph; Meave, Jorge A; Muñoz, Rodrigo; Romero-Pérez, Eunice; Andrade, Ana; Andrade, José Luis; Balvanera, Patricia; Becknell, Justin M; Bentos, Tony V.; Radika Bhaskar; Bongers, Frans; Boukili, Vanessa; Brancalion, Pedro H. S.; César, Ricardo G.; Clark, Deborah A.; Clark, David B.; Craven, Dylan; DeFrancesco, Alexander; Dupuy, Juan M.; Finegan, Bryan; Pérez-García, Eduardo; González-Jiménez, Eugenio; Hall, Jefferson S.; Harms, Kyle E.; Hernández-Stefanoni, José Luis; Hietz, Peter; Kennard, Deborah; Killeen, Timothy J.; Susan G., Laurance; Lebrija-Trejos, Edwin E.; Lohbeck, Madelon; Martínez-Ramos, Miguel; Massoca, Paulo E. S.; Mesquita, Rita C. G.; Mora, Francisco; Muscarella, Robert; Paz, Horacio; Pineda-García, Fernando; Powers, Jennifer S.; Rodrigues, Ricardo R.; Sandor, Manette E.; Sanaphre-Villanueva, Lucía; Schüller, Elisabeth; Swenson, Nathan G.; Tauro, Alejandra; Uriarte, María; van Breugel, Michiel; Vargas-Ramírez, Orlando; Viani, Ricardo A. G.; Wendt, Amanda L.; Williamson, Bruce (Blackwell Publishing Ltd, 2015-09)
      Successional gradients are ubiquitous in nature, yet few studies have systematically examined the evolutionary origins of taxa that specialize at different successional stages. Here we quantify successional habitat ...
    • Engineering of the Stellarator of Costa Rica: SCR-1 

      Piedra, C.; Jiménez, W.; Esquivel, L.; Esquivel, R.; Sánchez, K.; González, J.; Mora-Meléndez, Jaime; Otárola-Zúñiga, Carlos; Vargas-Blanco, Iván (Institute of Physics Publishing, 2015-03)
      This Paper aims at briefly describing the challenge of the design and construction of the Stellarator of Costa Rica 1 (SCR-1) [1]. The SCR-1 is a small modular Stellarator for magnetic confinement of plasma (Ro=0.238 m, ...
    • Effects of thinning on diameter, heartwood, density and drying defects of gmelina arborea 

      Vallejos, Jonathan; Serrano, Rafael; Moya-Roque, Roger (Universidade Federal de Sao Carlos, 2015)
      The effect of three levels thinning intensity in Gmelina arborea plantation on tree diameter, heartwood (diameter and percentage), wood density and drying defects (twist, crook, bow and check) was studied. Wood used for ...
    • Effects of adding nano-clay (montmorillonite) on performance of polyvinyl acetate (PVAc) and urea-formaldehyde (UF) adhesives in Carapa guianensis, a tropical species 

      Rodríguez-Zúñiga, Ana; Vega-Baudrit, José; Alvarez, Vera; Moya-Roque, Roger (Elsevier Ltd, 2015-06)
      The aim of this study was to improve the bond strength resistance of polyvinyl acetate (PVAc) and urea-formaldehyde (UF) adhesives modified with nano-clay (montmorillonite) with a tropical species of wood known to exhibit ...
    • Effects of adding multiwall carbon nanotubes on performance of polyvinyl acetate and urea-formaldehyde adhesives in tropical timber species 

      Rodríguez-Zúñiga, Ana; Vega-Baudrit, José; Moya-Roque, Roger (Hindawi Publishing Corporation, 2015)
      Multiwall carbon nanotubes (MWCNTs) functionalized with hydroxyl groups (MWCNTs-OH) have been incorporated into polyvinyl acetate (PVAc) and urea-formaldehyde (UF) adhesives utilized in tropical wood gluing. The Raman ...
    • Digital integrated circuit implementation of an identification stage for the detection of illegal hunting and logging 

      Salazar-García, Carlos; Alfaro-Hidalgo, Luis; Carvajal-Delgado, Mauricio; Montero-Aragón, Jordan; Castro-Gonzalez, Reinaldo; Agustín-Rodríguez, Juan; Chacon-Rodríguez, Alfonso; Alvarado-Moya, Pablo (Institute of Electrical and Electronics Engineers Inc., 2015-09)
      Results of the VLSI implementation of an acoustic classification system's identification stage, intended for the detection of gunshots and chainsaws in a protected tropical area, are shown, with the idea of later building ...
    • Design of an IDM-based determinant computing unit for a 130nm low power CMOS ASIC acoustic localization processor 

      Cerdas-Robles, Roberto; Rodríguez, Agustín; Julián, Pedro; Chacón-Rodríguez, Alfonso (Institute of Electrical and Electronics Engineers Inc., 2015-09)
      A determinant computing circuit in floating point format has been designed and tested for use in a CMOS ASIC acoustic localization processor. The Internal Division Method (IDM) was used to implement the operation, employing ...
    • Design of a Prototype of Water Purification by Plasma Technology as the Foundation for an Industrial Wastewater Plant. 

      Barillas-Mora, Laura (Institute of Physics Publishing, 2015-03)
      In order to mitigate the contamination of water sources due to the spill of sewage without any kind of treatment, mainly generated by the industrial sector; a prototype of water purification by plasma technology has been ...
    • Escalamiento del cultivo de células en suspensión de Azadirachta indica (NEEM) en biorreactor tanque agitado para la produccion de azadiractina 

      Sánchez-Ordoñez, David Leonardo (Instituto Tecnológico de Costa Rica, 2014)
      The following Master’s Thesis engages in the area of NeuroMuscular Electrical Stimulation (NMES), which comprises the activation of nerves and muscle fibers by applying electrical current pulses using two electrodes ...