Listar Ciencias básicas por título
Mostrando ítems 1659-1678 de 3121
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Inventario florístico de la Reserva Biológica Alberto Ml. Brenes en San Ramón
(2014-01-28)A partir de 1978 se incician las actividades docentes-administrativas y de investigación en la Reserva Biológica, por lo que se hizo necesario conocer su biodiversidad.Este proyecto de tuvo como objetivos: conocer la ... -
Inventario florístico en varias áreas boscosas en Tabarcia de Mora y Palmichal de Acosta, Costa Rica
(1993)Se realizó un inventario florístico en la cuenca de los ríos Tabarcia y Negro, San José, con el fin de estimular la creación de un sistema de pequeñas reservas forestales privadas. Se identificaron más de 180 especies ... -
Inventory of macroalgal epiphytes on the seagrass Thalassia testudinum (Hydrocharitaceae) in Parque Nacional Cahuita, Caribbean coast of Costa Rica
(2008)Seagrass epiphytes play an important role in seagrass habitats; however, available information from Central America is scarce. The present study focuses on macroalgal epiphytes on leaves of the seagrass Thalassia testudinum ... -
Investigación colaborativa, generación de redes y coautoría de publicaciones: un estudio de caso del Instituto Clodomiro Picado
(2013)Este texto analiza la importancia de las colaboraciones y redes científicas en la generación de conocimientos y la publicación de artículos científicos en coautoría. Plantea cuestiones sobre cómo las redes de colaboración ... -
La investigación en la Reserva Biológica Alberto ML. Brenes (Área de Conservación Arenal - Tilarán)
(2000)El documento se refiere a las actividades de investigación en la Reserva Biológica Alberto Manuel Brenes (RBAMB), ubicada en San Ramón de Alajuela y administrada por la Universidad de Costa Rica, por medio de la Sede de ... -
Iridiscencia foliar
(2020)La iridiscencia en plantas es un fenómeno óptico producido por la interacción entre la luz y la estructura de las células, lo que origina un color estructural (no intervienen pigmentos). La luz que incide en las hojas puede ... -
Irreversibility in an ideal fluid
(2014-10)When a real fluid is expelled quickly from a tube, it forms a jet separated from the surrounding fluid by a thin, turbulent layer. On the other hand, when the same fluid is sucked into the tube, it comes in from all ... -
Irreversibility of mechanical and hydrodynamic instabilities
(2017-12-01)The literature on dynamical systems has, for the most part, considered self-oscillators (i.e., systems capable of generating and maintaining a periodic motion at the expense of an external energy source with no corresponding ... -
Is birdsong music? Evaluating harmonic intervals in songs of a Neotropical songbird
(2012)Signals in animal communication are commonly judged as aesthetically appealing by human standards. This is particularly common for birdsong, often equated to musical compositions. No formal test, however, has analysed ... -
Is black plumage an adaptation to high elevations in a cosmopolitan bird genus?
(2019)Black plumage is expected to absorb and retain more heat and provide better protection against UV radiation compared with lighter plumages. Black plumage is common in species of the genera Turdus and Platycichla that inhabit ... -
Is mating in the Túngara Frog (Engystomops pustulosus: Leptodactylidae) random or non-random?
(2017)Random and non-random mating result from sexual selection, and both can occur across populations of the same species. Body size is a trait commonly used to determine if mating is random or non-random, and for the latter ... -
Isla del Coco / Cocos Island: la isla que hizo grande a Costa Rica
(2018)Reseña del libro de Ross Lemus, Jazmín, Salguero Moya, Karina & Parra, Ana María; fotografías por Luciano Capelli, Pristine Seas y otros, sobre la biodiversidad, los paisajes y la historia de la Isla del Coco en el Pacífico ... -
Isolation and characterization of microsatellites for the neotropical dioecious palm Chamaedorea tepejilote (Arecaceae) and cross‑amplification in other Chamaedorea species
(2020-06-18)Palms are important components of tropical and subtropical ecosystems and have even been considered keystone plant resources that can support a large array of pollinators and frugivores. Palms are also economically important. ... -
Isolation and characterization of microsatellites loci in Spondias purpurea (Anacardiaceae) and cross amplification in congeneric species
(2019-07-18)Microsatellite markers provide high polymorphism levels, useful to study genetic diversity and gene flow patterns in plant populations. Here we develop and characterize microsatellite primers to evaluate patterns of genetic ... -
Isolation of a myotoxin from Bothrops asper venom: Partial characterization and action on skeletal muscle
(1984)A myotoxic phospholipase has been isolated from Bothrops asper venom by ion-exchange chromatography on CM-Sephadex followed by gel filtration on Sephadex G-75. The toxin is a basic polypeptide with an estimated molecular ... -
Isolation of Flavonoids from Deguelia duckeana and Their Effect on Cellular Viability, AMPK, eEF2, eIF2 and eIF4E
(2016)Preparations of Deguelia duckeana, known in Brazil as timbó, are used by indigenous people to kill fish. Reinvestigation of its extracts resulted in the isolation and identification of 11 known flavonoids identified as ... -
Isolation of Fungi and Bacteria Associated with the Guts of Tropical Wood-Feeding Coleoptera and Determination of Their Lignocellulolytic Activities
(2015-08)The guts of beetle larvae constitute a complex system where relationships among fungi, bacteria, and the insect host occur. In this study, we collected larvae of five families of wood-feeding Coleoptera in tropical forests ... -
Isolation of Major Components from the Roots of Godmania aesculifolia and Determination of Their Antifungal Activities
(2013)From the methanol root extract of Godmania aesculifolia, a species selected in a multinational OAS program aimed at discovering antifungal compounds from Latin American plants, a new chavicol diglycoside (1), the known ... -
Isometry groups of borel randomizations
(2018-08)We study global dynamical properties of the isometry group of the Borel randomization of a separable complete structure. In particular, we show that if properties such as the Rohklin property, topometric generics, extreme ... -
IVF in Costa Rica
(2017)For 16 years, Costa Rica was the only country in the world that banned IVF, after it had been successfully conducted from 1995 to 2000. It also has been the only country that banned IVF based on the argument that it protects ...