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Institution

University of Costa Rica

EducationSan José, Costa Rica
About: University of Costa Rica is a education organization based out in San José, Costa Rica. It is known for research contribution in the topics: Population & Venom. The organization has 9817 authors who have published 16781 publications receiving 238208 citations. The organization is also known as: UCR & Universidad de Costa Rica.
Topics: Population, Venom, Antivenom, Snake venom, Myotoxin


Papers
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Journal ArticleDOI
TL;DR: The result is a single-variable light-front Schrödinger equation for QCD which determines the eigenspectrum and the light- front wave functions of hadrons for general spin and orbital angular momentum.
Abstract: Starting from the Hamiltonian equation of motion in QCD, we identify an invariant light-front coordinate {zeta} which allows the separation of the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single variable light-front Schroedinger equation for QCD which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. This light-front wave equation is equivalent to the equations of motion which describe the propagation of spin-J modes on anti-de Sitter (AdS) space. This allows us to establish formally a gauge/gravity correspondence between an effective gravity theory defined on AdS5 and light front QCD.

331 citations

Journal ArticleDOI
TL;DR: It is highlighted that LaeA-based genome mining helps decipher the secondary metabolome of Aspergilli and provides an unparalleled view to assess secondary metabolism gene regulation.

322 citations

Journal ArticleDOI
TL;DR: Widespread declines and extinctions in Atelopus may reflect population changes in other Neotropical amphibians that are more difficult to survey, and the loss of this trophic group may have cascading effects on other species in tropical ecosystems.
Abstract: We surveyed the population status of the Neotropical toad genus Atelopus, and document recent catastrophic declines that are more severe than previously reported for any amphibian genus. Of 113 species that have been described or are candidates for description, data indicate that in 42 species, population sizes have been reduced by at least half and only ten species have stable populations. The status of the remaining taxa is unknown. At least 30 species have been missing from all known localities for at least 8 yr and are feared extinct. Most of these species were last seen between 1984 and 1996. All species restricted to elevations of above 1000 m have declined and 75 percent have disappeared, while 58 percent of lowland species have declined and 38 percent have disappeared. Habitat loss was not related to declines once we controlled for the effects of elevation. In fact, 22 species that occur in protected areas have disappeared. The fungal disease Batrachochytrium dendrobatidis has been documented from nine species that have declined, and may explain declines in higher elevation species that occur in undisturbed habitats. Climate change may also play a role, but other potential fact ors such as environmental contamination, trade, and introduced species are unlikely to have affected more than a handful of species. Widespread declines and extinctions in Atelopus may reflect population changes in other Neotropical amphibians that are more difficult to survey, and the loss of this trophic group may have cascading effects on other species in tropical ecosystems.

322 citations

Journal ArticleDOI
TL;DR: Proteomic protocols for uncoiling the composition, immunological profile, and evolution of snake venoms are reviewed to gain a deep insight of all viperid venom proteomes.

317 citations

Journal ArticleDOI
TL;DR: This study assembles a geographic information system (GIS) to relate the 2000 census population with an inventory of health facilities (supply) and assesses the equity in access to health care by Costa Ricans and the impact on it by the ongoing reform of the health sector.

314 citations


Authors

Showing all 9922 results

NameH-indexPapersCitations
Alberto Ascherio13646269578
Gervasio Gomez133184499695
Myron M. Levine12378960865
Hong-Cai Zhou11448966320
Edward O. Wilson10140689994
Mary Claire King10033647454
Olga Martín-Belloso8638423428
José María Gutiérrez8460726779
Cesare Montecucco8438227738
Rodolphe Clérac7850622604
Kim R. Dunbar7447020262
Paul J. Hanson7025119504
Hannia Campos6921015164
Jean-Pierre Gorvel6723115005
F. Albert Cotton66102327647
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202325
2022155
2021864
20201,009
2019894
2018834