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Now showing items 1891-1910 of 13725
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Characteristics of the spontaneous deposition of Sn in polycrystalline Pt
(2012-04)Spontaneous deposition of tin (Sn) in polycrystalline platinum (Pt pc) from a sulfuric acid solution of tin salts, was evaluated by conventional electrochemical techniques, to determine its characteristics. Tin was deposited ... -
Characteristics of the venoms and digestive secretions of Aphonopelma seemanni and Sphaerobothria hoffmanni (Araneae: Theraphosidae) of Costa Rica
(Universidad de Costa Rica, 1987)A comparison of some components of the venoms of two Costa Rican tarantulas, Aphonopelma seemanni (Cambridge) and Sphaerobothria hoffmanni (Karsch) by polyacrylamide gel electrophoresis shows patterns similar to those of ... -
Characterization and applications of silver nanoparticles-decorated electrospun nanofibers loaded with polyphenolic extract from rambutan (Nepelium lappaceum)
(Elsevier B.V., 2020-05)Rambutan (Nephelium lappaceum) is a traditional fruit originally from Asia and now widely available in Central America. The rind of rambutan is rich in antioxidants, especially polyphenols, which have natural anti-inflammatory ... -
Characterization and development of citizenship competence in the training of secondary school mathematics teachers
(Tecnológico de Costa Rica, 2016)This paper is intended to determine the knowledge of teachers during their period of training of what characterizes a good citizen, to shed light on the concept of citizenship through activities related to the teaching ... -
Characterization of a recent malaria outbreak in the autonomous indigenous region of Guna Yala, Panama
(BioMed Central, 2015-11-17)Background: This study aims to describe the epidemiological and entomological factors associated with a recent malaria outbreak that occurred in 2012 in a socially marginalized population from Guna Yala Comarca in Panama. ... -
Characterization of Anaplasma spp. infection in dogs from Costa Rica
(Universidad Nacional, Costa Rica, 2017-02-09)A cross-sectional study combining serological and molecular techniques for detecting selected Anaplasma species was conducted between 2011 and 2012 in dogs and ticks sampled in all provinces of Costa Rica. Global Anaplasma ... -
Characterization of attack events on sea turtles (chelonia mydas and lepidochelys olivacea) by jaguar (panthera onca) in naranjo sector, santa rosa national park, Costa Rica
(International Journal of Conservation Science, 2016-01)In this study, we examined sea turtles consumption by jaguars and their temporal and spatial distribution at Naranjo beach, Santa Rosa National Park Costa Rica. We include information about sea turtle consumption rate by ... -
Characterization of Brucella abortus and Brucella melitensis native haptens as outer membrane O-type polysaccharides independent from the smooth lipopolysaccharide
(American Society for Microbiology, 1996)Brucella native haptens (NHs) extracted with hot water from smooth (S)- type B. abortus and B. melitensis were purified to high levels of serological activity and compared with the polysaccharide obtained by acid hydrolysis ... -
Characterization of Brucella abortus lipopolysaccharide macrodomains as mega rafts
(Blackwell Science, 2005-09-28)The lipopolysaccharides (LPS) of intracellular Proteobacteria such as Brucella, Chlamydia, Legionella and Rickettsia, have properties distinct from enterobacterial LPSs. These properties include deficient LPS induction of ... -
Characterization of culturable marine luminescent bacteria isolated from the Gulf of Nicoya, Costa Rica
(Consejo Superior de Investigaciones Científicas (España), 2017)Luminescence in bacteria is dependent on quorum sensing and is regulated by the luxCDAB operon. The expression of this operon genes can be inhibited by explosion to toxic substances such as heavy metals. The ratio between ... -
Characterization of PRRSV and dynamics of the virus in swine farms in Costa Rica
(Universidad Nacional, Costa Rica, 2018)The Porcine ReproducPve and Respiratory Syndrome (PRRS) was first recognized clinically in the EU in 1987, and thereaYer it spread through Europe and America. The virus has two genotypes: ... -
Characterization of sandy beaches of the Southern Caribbean of Costa Rica
(Instituto Tecnológico de Costa Rica, 2021-07)Las zonas costeras son ambientes dinámicos que brindan múltiples servicios ecosistémicos. La influencia de factores naturales y antrópicos conducen cambios cada vez más drásticos, que generan impactos negativos en la ... -
Characterization of surface water isotope spatial patterns of Scotland
(Elsevier B.V., 2018-07-24)The extended National Waters Inventory of Scotland (NWIS) monitoring network in combination with an extensive, supplementary low flow sampling campaign was used to create isoscapes of surface water for management purposes ... -
Characterization of the coral communities and reefs ot two previously underscribed locations in the upwelling region of Gulf of Papagayo Costa Rica
(Universidad Nacional (Costa Rica), 2010)In the seasonal upwelling region of Gulf of Papagayo (Northern Pacific coast of Costa Rica), we evaluated and described two previously poorly known coral habitats, Punta Cacique and Bahía Guacamaya. Both localities differed ... -
Characterization of the VARIAN®PaxScan 2020+ flat panel detector for quantitative X-ray imaging
(X-Ray Spectrometry vol.45 no.3 169-175 2016, 2016-02-19)In this work, the response of the VARIAN® PaxScan 2020+ flat panel detector was characterized in terms of spatial resolution and uniformity across the detection area along with detection efficiency for photon beams from ... -
Characterizing tsunami signals from the Hunga Tonga-Hunga-Ha’apai eruption and its effects on the Caribbean
(American Geophysical Union, 2022-12-13)The Hunga Tonga Hunga Ha'apai eruption of January 15 2022, was a rare geological event, resulting in atmospheric pressure waves being recorded around the world. The event caused significant environmental consequences, ... -
Chavela Vargas : su mitificación como personaje artístico y cultural
(Universidad Nacional, Costa Rica, 2019-03-08)Luego de seis años del deceso de Chavela Vargas, resulta imposible negar su notoriedad en el ámbito artístico, su transgresión a los roles femeninos de principios del siglo XX y su relación con artistas influyentes, todos ... -
El che y la eternidad historica
(Universidad Nacional, Costa Rica, 1999) -
Chechnya and regional order: The bear against the scimitar
(Universidad Nacional, Costa Rica, 2002)El fin de la Guerra Fría se inauguró como remate de una posible guerra nuclear entre las superpotencias como Estados Unidos y la Unión Soviética. Pero esta nueva era ha comenzado con una escalada de conflictos étnicos ... -
Checklist of the vascular flora of Reserva Biológica San Luis, Costa Rica
(Pensoft, 2016-03-21)The Reserva Biológica San Luis is a small protected area located on the Pacific side of the Cordillera de Tilarán, northwestern Costa Rica, with a forest transitioning between the basal and premontane floras according to ...