Listar Investigación por título
Mostrando ítems 41-60 de 19072
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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: ... -
A climatology of low level wind regimes over Central America using a weather type classification approach
(2015-04)Based on the potential of the weather types classification method to study synoptic features, this study proposes the application of such methodology for the identification of the main large scale patterns related with ... -
A Clostridium difficile Lineage Endemic to Costa Rican Hospitals Is Multidrug Resistant by Acquisition of Chromosomal Mutations and Novel Mobile Genetic Elements
(2017-01)The antimicrobial resistance (AMR) rates and levels recorded for Clostridium difficile are on the rise. This study reports the nature, levels, diversity, and genomic context of the antimicrobial resistance of human C. ... -
A comparative study of hurricanes Fifi (1974) and Greta (1978) and their associated rainfall distributions over central America
(1996)A comparative study of hurricanes Fifi (1974), which had similar tracks but produced different rainfall distributions over Central America, was made. It was found that Fifia was much rainier in spite of being much less ... -
A Comparative Study on Denoising Algorithms for Footsteps Sounds as Biometric in Noisy Environments
(2022-08-03)Biometrics is the automated identification of a person based on distinctive characteristics, such as fingerprints, face, voice, or the sound of footsteps. This last characteristic has significant challenges considering the ... -
A Comparison between a Relational Database and a Graph Database in the context of a Personalized Cancer Treatment Application
(2016)This paper presents a performance comparison between a relational database (implemented in MySQL) and a graph database (implemented in Neo4j). Unlike traditional benchmarks, this comparison is made in the context of a real ... -
A Comparison of Associations Between Self-Reported and Device-Based Sedentary Behavoir and Obesity Markers in Adults: A Multi-National Cross-Sectional Study
(2021-05-28)The purpose of this study was to examine the associations between self-reported and device-based measures of sedentary behavior (SB) with obesity markers in adults from Latin American countries. Sitting time and total time ... -
A comparison of bio-inspired optimization methodologies applied to the tuning of industrial controllers
(2016-11-09)A comparison of different bio-inspired methods is presented for the problem of tuning the parameters of a PID industrial controller for second order plus time delay plants. The compared algorithms are representative of ... -
A Comparison of four Methods to Evaluate the Butterfly Abundance. Using a Tropical Community
(Journal of the Lepidopterists' Society 45(3), 1991, 241-243, 1991-03-18)In recent years. several transect methods to evaluate the abundance of butterflies have been proposed (Pollard, E. 1977, Biol. Conserv. 12:115—134; Feltwell, 3. 1982. Proc. Trans. Br. Entomol. Nat. Hist. Soc. 15:17—24). ... -
A comparison of in vitro methods for assessing the potency of therapeutic antisera against the venom of the coral snake Micrurus nigrocinctus
(1997-04)Therapeutic antisera against Micrurus nigrocinctus venom were tested for protection against lethality, as well as for inhibition of the nicotinic acetylcholine receptor (AchR)-binding and neutralization of phospholipase ...