Browsing Biología by Title
Now showing items 536-555 of 732
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Observations on the breeding behaviour of Snowy Cotinga
(2016)Tres nidos de la Cotinga Nivosa Carpodectes nitidus muestran un diseño muy simple, que consiste en una plataforma construida de ramitas y zarcillos, similar al descrito previamente para esta especie y para otras cotingas. ... -
Observations on the ultrastructure and hydrophobicity of the wings of thirteen Neotropical families of diptera (insecta) with comments on their flight
(2015-11)Insects' wings are complex surfaces that have become a new field to study towards the design of flying devices and hydrophobic surfaces. Several orders and families of insects have been analyzed for their hydrophobic ... -
Ontogenetic changes in web architecture and growth rate of Tengella radiata(Araneae, Tengellidae)
(2008)In some spiders features of the webs of early instars may represent features of the ancestor's web. Some second instar spiderlings (first instar outside of the egg sac) of Tengella radiata (Kulczynski 1909) construct a ... -
Ontogeny repeats phylogeny in Steatoda and Latrodectus spiders
(2010)Web designs of young spiders are often less derived than those of older conspecific individuals. This study tested whether this ‘‘ontogeny repeats phylogeny’’ pattern occurs in two species of Latrodectus and two species ... -
Optimization of a Fungally Bioaugmented Biomixture for Carbofuran Removal in On-Farm Biopurification Systems
(2016)Biomixtures comprise the active part of biopurification systems (BPS) for the removal of pesticide-containing wastewater from agricultural origin. Considering that biomixtures contain an important amount of lignocellulosic ... -
Las orquídeas de la Isla del Coco
(2005-08)A pesar de que a veces parece que el mundo se ha vuelto demasiado pequeño y muy bien conocido, todavía hay algunos lugares remotos y solitarios que no han sido totalmente conquistados por el hombre. La Isla del Coco es uno ... -
Otro más que atraviesa el mutualismo plata - hormiga
(2018)Las interacciones mutualistas entre hormigas y plantas son comunes y el grado de especialización varía mucho entre ellas. Algunas especies de hormigas en el género Pseudomyrmex mantienen relaciones mutualistas obligatorias ... -
Papel de la bacteria endosimbionte Wolbachia en el control de enfermedades vectoriales: dengue, zika y chikunkunya
(2017)Wolbachia es un género de bacterias perteneciente al orden Rickettsiales, que participa en diversas relaciones simbióticas con varios organismos, principalmente artrópodos y nematodos. Debido a su capacidad para inducir ... -
Parque Nacional Manuel Antonio Análisis de Satisfacción de Demanda
(2005-02-01)Generar información necesaria y relevante respecto a los mercados demandantes que visitan el Parque Manuel Antonio con motivos turísticos y otro objetivo es recoger datos en terreno mediante encuestas; para luego ordenarlos, ... -
Parturition in onychophorans: new record and a review.
(Brenesia 29:15-20, 1988)El parto en una especie costarricense de Epiperiparus tiene la siguiente secuencia: la madre presenta peristalsis y un hinchamiento del gonoporo, los lobopodios terminales se levantan y el neonato empieza a salir, a lo que ... -
Pathogenesis of myonecrosis induced by crude venom and a myotoxin of Bothrops asper.
(1984)The pathogenesis of skeletal muscle necrosis induced by crude Bothrops asper venom and isolated myotoxic phospholipase was studied using light and electron microscopy. White mice were injected intramuscularly with a dose ... -
Patterns of second‐to‐fourth digit length ratios (2D:4D) in two species of frogs and two species of lizards at La Selva, Costa Rica
(2012)It is now well documented that androgen and estrogen signaling dur- ing early development cause a sexual dimorphism in second-to-fourth digit length ratio (2D:4D). It is also well documented that males of mam- malian ... -
El pensamiento evolucionista de Clodomiro Picado T.
(Historia de la ciencia y la tecnología: el avance de una disciplina. Cartago: Editorial Tecnológica, 1989)Los autores que han escrito sobre la filosofía biológica de C. Picado han afirmado que era lamarckista, “como correspondía a un científico entren ado en París” en esa época Este trabajo intenta demostrar que esa afirmación ... -
Pharmacological activities of a toxic phospholipase A isolated from the venom of the snake Bothrops asper
(1986)A toxic phospholipase A was isolated from the venom of Bothrops asper. It induced skeletal muscle damage, anticoagulant effects and edema in the foot pad. The toxin had an intravenous LD50 of 95 micrograms/16-18 g mouse ... -
Phospholipase C and sphingomyelinase activities of the Clostridium perfringens Alfa-toxin
(Chemistry and Physics of Lipids, 2009-02)Alfa-Toxin is a major pathogenic determinant of Clostridium perfringens, the causative agent of gas gangrene. Alfa-Toxin has been known for long to be a phospholipase C, but up to now its hydrolytic properties have been ... -
Photochemical efficiency of adult and young leaves in the neotropical understory shrub Psychotria limonensis (Rubiaceae) in response to changes in the light environment
(Revista de Biologia Tropical 52 (4): 839-844, 2004-12)We explored the short-term adjustment in photochemical efficiency (Fv/Fm) in adult and young leaves of the understory neotropical shrub Psychotria limonensis Krause (Rubiaceae) in response to rapid changes in the light ...