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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 ...
Convergent and complementary selection shaped gains and losses of eusociality in sweat bees
(2023-03-20)
Sweat bees have repeatedly gained and lost eusociality, a transition from individual to group reproduction. Here we generate chromosome-length genome assemblies for 17 species and identify genomic signatures of evolutionary ...
Mecanismo de acción de miotoxinas aisladas de venenos de serpientes
(1984)
Biochemically and pharmacologically, myotoxins isolated from snake venoms can be placed in four main groups: myolaxic phospholipases A, low molecular weight basic toxins, cardiotoxins, and hemorrhagic myotoxins. The myotoxic ...
Polimorfismos genéticos en Costa Rica.
(Acta Médica Costarricense 41(3):3, 1999)
En Costa Rica, pocos son los estudios genéticos realizados en la población general, constituida por una amalgama que incluye tres etnias principales en diferentes proporciones. El trabajo de Rojas et al. representa un ...
Behavioral changes across novelty habituation: Contextual modulation of self-grooming after a stress event
(2018-07)
Grooming is a widespread behavior in the animal kingdom primarily geared towards the care of the body surface; nonetheless, other behavioral functions have been investigated and postulated. For example, rodents display ...
Comparative study of the edema-forming activity of Costa Rican snake venoms and its neutralization by a polyvalent antivenom
(1986)
The edema-forming activity of eight Costa Rican crotaline snake venoms and its neutralization by a polyvalent antivenom were studied using the mouse footpad test. All of the venoms induced edema, the highest activity being ...
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 ...
Predictors of overall survival after surgery in gastric cancer patients from a Latin-American country
(2017)
Background: Gastric cancer is one of the major causes of cancer-related deaths in several Latin-American countries, including Costa Rica. However, determinants of poor outcomes are fairly unknown for patients from this ...
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 ...
Ultrastructural and microbial analyses of cellulose degradation in leaf-cutter ant colonies
(2017)
Leaf-cutter ants (Atta and Acromyrmex) use fresh leaves to cultivate a mutualistic fungus (Leucoagaricus gongylophorus) for food in underground gardens. A new ant queen propagates the cultivar by taking a small fragment ...