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A biogeographical evaluation of high-elevation myxomycete assemblages in the northern Neotropics
(2011-08)This study represented an effort to apply some of the relatively well-known biogeographical and macroecological models to the observed structure of myxomycete assemblages, with emphasis on the northern Neotropical region. ... -
A brief account of the history of family planning in Costa Rica
(2009)Costa Rica has been a focus of demographic attention for at least two reasons: its startling rate of natural population growth, which peaked at 3.8% during 1955 and 1960 and which was considered one of the highest in the ... -
A brief survey of Higgs bundles
(2019-06)Considering a compact Riemann surface of genus greater or equal than two, a Higgs bundle is a pair composed of a holomorphic bundle over the Riemann surface, joint with an auxiliar vector field, so-called Higgs field. This ... -
A bright future for integrative venomics
(2015-10)Venomous secretions are produced by a myriad of animal species, from invertebrates to vertebrates. As a general rule, peptides and proteins represent the most abundant and functionally relevant components of these dangerous ... -
A Call for Incorporating Social Research in the Global Struggle against Snakebite
(2015-09-17)In Africa, Asia, Latin America, and parts of Oceania, envenoming after snakebite is a serious public health problem. Conservative data suggest that between 1.2 and 5.5 million people suffer snakebites every year, resulting ... -
A call-and-response system facilitates group cohesion among disc-winged bats
(2013)Acoustic signals are important in maintaining group cohesion, particularly in highly mobile species. For these signals to facilitate group cohesion, individuals must be able to recognize, and respond to, calls emitted by ... -
A carbonate platform associated with shallow cold methane seeps in Golfo Dulce, Pacific Costa Rica
(2015)Marine methane seeps are typically observed in cold, anoxic and organic-rich deep-sea environments, such as in the Black Sea, where methane emissions fuel the authigenic accretion of calcium carbonate structures via microbial ... -
A case-control study of breast cancer and hormonal contraception in Costa Rica
(1987)By 1981, 11% of married women in Costa Rica ages 20-49 years had used depot-medroxyprogesterone acetate (DMPA) and 58% had used oral contraceptives (OCs). Since 1977, the Costa Rican Ministry of Health has maintained a ... -
A catalytically-inactive snake venom Lys49 phospholipase A2 homolog induces expression of cyclooxygenase-2 and production of prostaglandins through selected signaling pathways in macrophages
(2013-05-15)The effects of a snakevenom Lys-49phospholipaseA2 (PLA2) homolog named MT-II,devoid of enzymatic activity, on the biosynthesis of prostaglandins and protein expression of cyclooxygenase-2(COX-2) and signaling pathways ... -
A cellular deficiency of gangliosides causes hypersensitivity to Clostridium perfringens phospholipase C
(2005-07-22)Clostridium perfringens phospholipase C (Cp-PLC), also called alpha-toxin, is the major virulence factor in the pathogenesis of gas gangrene. Previously, a cellular UDP-Glc deficiency was related with a hypersensitivity ... -
A check list of asexual fungi from Costa Rica
(2018-09-27)A checklist of recorded asexual fungi from Costa Rica is presented. This study compiles information from 1927 to 2018 based on scientific papers, theses, reviews of hyphomycetous and coelomycetous fungi, dermatophyte ... -
A Chronoamperometric Screen Printed Carbon Biosensor Based on Alkaline Phosphatase Inhibition for W(VI) Determination in Water, Using 2-Phospho-l-Ascorbic Acid Trisodium Salt as a Substrate
(2015)This paper presents a chronoamperometric method to determine tungsten in water using screen-printed carbon electrodes modified with gold nanoparticles and cross linked alkaline phosphatase immobilized in the working ... -
A ClC Chloride Channel Homolog and Ornithine-Containing Membrane Lipids of Rhizobium tropici CIAT899 Are Involved in Symbiotic Efficiency and Acid Tolerance
(2005)Rhizobium tropici CIAT899 is highly tolerant to several environmental stresses and is a good competitor for nodule occupancy of common bean plants in acid soils. Random transposon mutagenesis was performed to identify novel ... -
A climate change projection for summer hydrologic conditions in a semiarid watershed of central Arizona
(2015-03-05)Potential climate change impacts on summer precipitation and subsequent hydrologic responses in the southwestern U.S. are poorly constrained at present due to a lack of studies accounting for high resolution processes. In ... -
A Climate Feature of the Tropical Americas: The Trade Wind Easterly Jet
(1998-06)Utilizando datos medios mensuales globales de los Reanálisis de NCEP/NCARP para el periodo 1982-1994 se documenta una característica de la circulación de las Américas tropicales no reportada hasta el momento en la literatura: ...