Escuelas y Departamentos: Envíos recientes
Mostrando ítems 261-280 de 534
-
General, physical and mechanical properties, termites resistance and drying defects of lumber of Tectona grandis from plantations of different climatic and sites fertility condition
(Springer India, 2015-06)The influence of climatic and site fertility conditions affect wood quality from fast growing trees. The change in tree diameter, thickness of sapwood, heartwood percentage and bark and pith tissue, physical and mechanical ... -
30-Gb/s Optical Link Combining Heterogeneously Integrated III–V/Si Photonics With 32-nm CMOS Circuits
(Institute of Electrical and Electronics Engineers Inc., 2015-02)We present a silicon photonics optical link utilizing heterogeneously integrated photonic devices driven by low-power advanced 32-nm CMOS integrated circuits. The photonic components include a quantum-confined Stark effect ... -
Using migratable objects to enhance fault tolerance schemes in supercomputers
(IEEE Computer Society, 2015-07)Supercomputers have seen an exponential increase in their size in the last two decades. Such a high growth rate is expected to take us to exascale in the timeframe 2018-2022. But, to bring a productive exascale environment ... -
The role of tropical dry forests for biodiversity, carbon and water conservation in the neotropics: lessons learned and opportunities for its sustainable management
(Springer-Verlag France, 2015-08)In this paper, we provide a comprehensive evaluation of the current regional literature associated with tropical dry forest (TDF) along three main axes: biodiversity, carbon and water conservation in the neotropics. Our ... -
Recommendations for the use of tree models to estimate national forest biomass and assess their uncertainty
(Springer-Verlag France, 2015-09)Three options are proposed to improve the accuracy of national forest biomass estimates and decrease the uncertainty related to tree model selection depending on available data and national contexts. Introduction: Different ... -
Cultivo in vitro de Geophila macropoda (Ruiz & Pav.DC) a partir de embriones cigóticos
(2010)El objetivo de esta investigación fue desarrollar un protocolo para el cultivo in vitro de Geophila macropoda. Este trabajo se efectuó en Guácimo de Limón, Costa Rica, entre junio del 2006 y febrero del 2007. En la fase ... -
Brotación in vitro de brotes de teca (Tectona grandis L.f.)
(2012)Teak (Tectona grandis L. f.) is an exotic timber species introduced to Costa Rica for commercial plantations due to the high demand for its wood, rapid growth and high-quality. Initially the seed was use as the only planting ... -
Crioconservación de semillas de teca (Tectona grandis L. f)
(2013)La teca (Tectona grandis L.f) es un árbol tropical con gran demanda por la alta calidad de su madera y rápido crecimiento. Los programas de mejoramiento genético para esta especie han dado como resultado semillas de mejor ... -
Guidelines for documenting and reporting tree allometric equations
(Springer-Verlag France, 2015-09)Given the pressing need to quantify carbon fluxes associated with terrestrial vegetation dynamics, an increasing number of researchers have sought to improve estimates of tree volume, biomass, and carbon stocks. Tree ... -
Establecimiento de un protocolo para la conservación in vitro a mediano plazo de uña de gato (Uncaria Tomentosa (Willd). D.C.)
(2011)Aproximadamente el 25% de los medicamentos de patente posee algún componente o es derivado de plantas. La importancia farmacológica de la uña de gato (U. tomentosa) radica en la producción de alcaloides empleados en medicina ... -
Micropropagación de Pilón (Hieronyma Alchorneoides)
(2011)El pilón (Hieronyma alchorneoides, Euphorbiaceae) es una de las especies nativas maderables de Costa Rica mejor adaptadas a condiciones abiertas de plantación; por sus características de crecimiento y variedad de usos, la ... -
Overcoming obstacles to sharing data on tree allometric equations
(Springer-Verlag France, 2015-09)Advances in ecology face the complexity of ecosystems with dynamics longer than a single scientist’s career. In forestry and REDD+ practice, in particular, our ability to understand forest ecosystem dynamics and to manage ... -
An overview of existing and promising technologies for national forest monitoring
(Springer-Verlag France, 2015-09)The main goal of national forest programs is to lead and steer forest policy development and implementation processes in an inter-sectoral way (FAO 2006). National forest monitoring systems contribute to forest programs ... -
Crioconservación de ápices y semillas de cedro (Cedrela odorata L.) mediante las técnicas de vitrificación y deshidratación
(2013)En busca de proteger el recurso forestal de Cedrela odorata L., actualmente amenazado, se planteó la necesidad de establecer un protocolo para su crioconservación; la investigación se realizó con ápices y semillas. Con los ... -
Uso de biotecnología modifica salmón para que crezca en la mitad del tiempo convencional
(Revista Alimentaria. Cámara Costarricense de la Industria Alimentaria. Edición 141, año 2015., 2015-01)Transgenic crops of plant origin are widely used globally in animal and male diets, however, no genetically modified animal has been approved for human consumption. This article mentions about the process and the regulated ... -
Biotecnología: trigo para celíacos y arroz enriquecido con lisina
(Cámara Costarricense de la Industria Alimentaria., 2016-09)The major importance of transgenic products at the commercial level is between soybeans, maize, cotton and canola. The objective of modifying crops is not only due to agronomic characteristics, taste and appearance but ... -
20 años de la comercialización mundial de cultivos biotecnológicos
(2016-11)The use of living organisms to obtain goods and services for humans is known as biotechnology. From these improvements are achieved such as higher nutritional quality, drought tolerance, pest resistance, and more. This ... -
Pellets Evaluation Made from Tropical-Climate Agricultural and Forestry Crops of Costa Rica with a Domestic Stove
(Springer Netherlands, 2015-12)The present study shows the results of the evaluation of the pellets made from two forestry crops and eight agricultural crops in Costa Rica by employing a 50 kW domestic stove. Methods: The following variables were ... -
Citrus huanglongbing associated with ‘Candidatus liberibacter asiaticus’ present in the northern region of Costa Rica but has not been detected in other citrus-growing areas
(American Phytopathological Society, 2015-12)Since 2011, citrus Huanglongbing (HLB, ex-greening) disease has been detected in Los Chiles, Costa Rica, close to the Nicaraguan border, by the State Phytosanitary Service (Servicio Fitosanitario del Estado; SFE) and by ... -
Identificación y valor nutricional de algunos materiales nativos de arándano (Vaccinium spp)
(2013)El arándano es un arbusto de la familia de las ericáceas del género Vaccinium. Sus frutos son bayas de color oscuro, azuladas o rojizas. Presenta cualidades nutricionales y antioxidantes que lo hace un fruto de alto valor ...