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Now showing items 873-892 of 13018
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Ansiedad, depresión y estrategias de autocuidado y afrontamiento ante el malestar psicológico en estudiantes universitarios.
(Universidad Nacional (Costa Rica) Sección Regional Huetar Norte y Caribe. Campus Sarapiquí, 2019-07-19)Este es un estudio sobre la prevalencia de criterios diagnósticos de ansiedad y depresión según lo indicado en el DSM-V, y la identificación de las estrategias de autocuidado, prevención y afrontamiento del malestar ... -
Antagonismo de Trichoderma contra el moho gris (Botrytis cinerea) de la mora en Costa Rica
(XX Congreso Latinoamericano de Fitopatología, 59 Reunión de la Sociedad Americana de Fitopatología División Caribe (APS-CD) y Tercer Seminario Internacional de Sanidad Agropecuaria, 2019-05)Obtiene aislamientos de organismos nativos antagonistas de B. cinerea en cuatro zonas productoras de mora en Costa Rica. -
Antecedentes sociohistóricos preliminares para evaluar el reconocimiento de saberes (Etno) matemáticos
(UNIVERSIDAD CATÓLICA DE CHILE, CAMPUS VILLARRICA, 2022-09-29)Este póster muestra los resultados preliminares de los antecedentes sociohistóricos de un trabajo de investigación doctoral sobre la configuración de un marco categorial que evalúe el reconocimiento institucional de los ... -
Anthelmintic resistance in commercial sheep farms in Costa Rica
(Elsevier B.V., 2021)Forty-eight commercial sheep farms were sampled between the years 2017 and 2019 to evaluate the percentage of reduction of the three families of broad-spectrum anthelmintic drugs available in Costa Rica - benzimidazoles ... -
Anthrone and oxanthrone C,O-diglycosides from Picramnia teapensis
(Elsevier, 2000)Two C,O-diglycosylated compounds, the anthrone picramnioside F, and the oxanthrone mayoside C, were isolated from the stem bark of Picramnia teapensis, along with the previously reported anthraquinones, 1-O-b-d- and ... -
Anthropogenic materials used by birds to nest in an urban landscape of Costa Rica
(Universidad Estatal a Distancia (Costa Rica), 2020-12)Introduction: Urbanization has affectedthe materials available for bird nesting, including anthropogenic materials that may be dangerous to the birds. Objective:To quantifythe materials used byseveral bird species ... -
Anthropometric Indicators in an Urban Fitness Center of the Province of Heredia
(Universidad Nacional de Costa Rica, 2015-04-17) -
Anti-inflammatory and antinociceptive activities of Loasa speciosa in rats and mice
(Elsevier, 2003)In the range of doses of 250–500 mgykg (given i.p.) the aqueous extract of Loasa speciosa leaves showed an inhibitory effect on leukocyte migration, and a reduction on the pleural exudate, as well as dose-dependent ... -
Anticuerpos contra Toxocara spp.en perros de la comunidad de Getsemaní de Heredia, Costa Rica
(Universidad Nacional, Costa Rica, 2018-08)La toxocariasis es causada por el nématodo Toxocara canis cuyo hospedero definitivo es el perro y otros cánidos. Es considerada una de las zoonosis más importantes por su impacto en salud pública. El ser humano puede ... -
Antifungal Saponins from the Maya Medicinal Plant Cestrum schlechtendahlii G. Don (Solanaceae)
(Wiley, 2015-12-15)Bioassay-guided fractionation of the crude extract (80% EtOH) of the leaves of Cestrum schlechtendahlii, a plant used by Q'eqchi' Maya healers for treatment of athlete's foot, resulted in the isolation and identification ... -
Antigenic relationship between the animal and human pathogen Pythium insidiosum and nonpathogenic Pythium species
(American Society for Microbiology, 1987)Identification of the newly named pathogenic oomycete Pythium insidiosum and its differentiation from other Pythium species by morphologic criteria alone can be difficult and time-consuming. Antigenic anaysis by ... -
Antigua luna (2017)
(Universidad Nacional, Costa Rica, 2020-06-30)La ciudad de Antigua, en Guatemala, ha sido y continúa siendo evocada a través de la palabra diluida en la historia y la memoria. Prueba de ello es el libro Poesía-documento, titulado Antigua Luna (2017), de la escritora ... -
Antiimperialismo latinoamericanista en la generación del Bicentenario
(Universidad Nacional, Costa Rica, 2015)En este artículo sostengo la tesis de que uno de los componentes centrales del llamado cambio de época en América Latina, en el siglo XXI, corresponde a una vertiente antiimperialista que se expresa con claridad en dos ... -
Antimicrobial activities of Marcgraviaceae species and isolation of a naphthoquinone from Marcgravia nervosa (Marcgraviaceae)
(NRC Research Press, 2015)The Marcgraviaceae is a neotropical plant family of lianas and shrubs distributed throughout Central and South America, mainly in evergreen and semi-evergreen tropical forests. In this study, extracts of 12 Marcgraviaceae ... -
Antimicrobial activity of myotoxic phospholipases A2 from crotalid snake venoms and synthetic peptide variants derived from their C-terminal region
(Elsevier, 2005)A short peptide derived from the C-terminal region of Bothrops asper myotoxin II, a Lys49 phospholipase A2 (PLA2), was previously found to reproduce the bactericidal activity of its parent molecule. In this study, a panel ... -
Antimicrobial activity of the heliangolide chromolaenide and related sesquiterpene lactones
(Pergamon Press, 1980)Some sesquiterpene lactones are known to exhibit antimicrobial activity [1, 2]. More recently, it has been noted that the pseudoguainolide carpesiolin inhibits the growth of Xanthomonas oryzae [3]. Here, we report on ... -
Antimicrobial properties of sea anemone Anthopleura nigrescens from Pacific coast of Costa Rica
(Elsevier (Países Bajos), 2016-05)Objective: To evaluate the antimicrobial and antifungal activities of the aqueous and partitioned extract of sea anemone Anthopleura nigrescens (A. nigrescens). Methods: The sea anemone A. nigrescens was collected, minced, ... -
Antimicrobial resistance and genetic diversity of Campylobacter spp. isolated from broiler chicken at three levels of the poultry production chain in Costa Rica
(International Association for Food Protection, 2021-07-29)Campylobacter spp. are considered the most common bacterial cause of human gastroenteritis, one of the four main causes of diarrheal disease worldwide, and they are one of the main foodborne pathogens causing hospitalizations ...