Browsing Química by Procedence

Now showing items 1-12 of 12

    • Bioassay-guided isolation of anti-inflammatory O-sulfated withanolides from Acnistus arborescens (Solanaceae) 

      Steinbrueck, Clara; Mora Ugalde, Nohelia; Morales Sánchez, Carlos; Loaiza Montoya, Randall; García Piñeres, Alfonso J.; Araya Barrantes, Juan José (2019)
      Bioassay-guided fractionation of Acnistus arborescens (Solanaceae) organic extract afforded two anti-inflammatory withanolides: 2,3-Dihydro-3β-O-sulfate withacnistin (1) and 2,3-Dihydro-3β-O-sulfate withaferin A (2) showing ...

    • Bocaparvovirus, Erythroparvovirus and Tetraparvovirus in New World Primates from Central America 

      Chaves Ramírez, Andrea; Ibarra Cerdeña, Carlos N.; López Pérez, Andrés; Monge Solano, Otto; Avendaño Vega, Roberto; Ureña Saborío, Hilary; Chavarría Vargas, Max; Zaldaña, Karla; Sánchez, Lucía; Ortíz Malavasi, Edgar; Suzán, Gerardo; Foley, Janet; Gutiérrez Espeleta, Gustavo A. (2020)
      Parvoviruses in the genera Bocaparvovirus (HBoV), Erythroparvovirus (B19) and Tetraparvovirus (PARV4) are the only autonomous parvoviruses known to be associated with human and non‐human primates based on studies and ...

    • Differential volatile organic compound expression in the interaction of Daldinia eschscholtzii and Mycena citricolor 

      Escudero Leyva, Efraín; Quirós Guerrero, Luis Manuel; Vásquez Chaves, Víctor; Pereira Reyes, Reinaldo; Chaverri Echandi, Priscila; Tamayo Castillo, Giselle (2023)
      Fungi exhibit a wide range of ecological guilds, but those that live within the inner tissues of plants (a.k.a. endophytes) are particularly relevant due to the benefits they sometimes provide to their hosts, such as ...

    • Fungi with history: Unveiling the mycobiota of historic documents of Costa Rica 

      Escudero Leyva, Efraín; Vieto Fonseca, Sofía; Avendaño Vega, Roberto; Rojas Gätjens, Diego; Agüero Gamboa, Paola; Pacheco Ureña, Carlos; Montero Villalobos, Mavis Lili; Chaverri Echandi, Priscila; Chavarría Vargas, Max (2022-06-12)
      Through nondestructive techniques, we studied the physicochemical characteristics and mycobiota of five key historic documents from Costa Rica, including the Independence Act of Costa Rica from 1821. We determined that for ...

    • Influence of rice field agrochemicals on the ecological status of a tropical stream 

      Jessen Rasmussen, Jes; Carazo Rojas, Elizabeth; Muñoz Rivera, Alejandro; Reiler, Emilie Marie; Matarrita Rodríguez, Jessie Alejandra; Cedergreen, Nina (2016-01-15)
      Many tropical countries contain a high density of protected ecosystems, and these may often be bordered by intensive agricultural systems. We investigated the chemical and ecological status of a stream connecting an area ...

    • Metals in coastal mollusks of Costa Rica 

      Vargas Zamora, José A.; Acuña González, Jenaro; Gómez Ramírez, Eddy; Molina Delgado, Johan (2015-12)
      The input of contaminants to coastal ecosystems is a global problem on the rise. Data on metal pollution from tropical sites is often lacking and pilot surveys are urgently needed to provide a general framework to estimate ...

    • Methylotrophs and Hydrocarbon-Degrading Bacteria Are Key Players in the Microbial Community of an Abandoned Century-Old Oil Exploration Well 

      Rojas Gätjens, Diego; Fuentes Schweizer, Paola; Rojas Jiménez, Keilor Osvaldo; Pérez Pantoja, Danilo; Avendaño Vega, Roberto; Alpízar Mena, Randall; Coronado Ruiz, Carolina; Chavarría Vargas, Max (2021-04-17)
      In this work, we studied the microbial community and the physicochemical conditions prevailing in an exploratory oil well, abandoned a century ago, located in the Cahuita National Park (Costa Rica). According to our analysis, ...

    • Microbial Community Structure Alogn a Horizontal Oxygen Gradient in a Costa Rican Volcanic Influeced Acid Rock Drainage System 

      Arce Rodríguez, Alejandro; Puente Sánchez, Fernando; Avendaño Vega, Roberto; Libby Hernández, Eduardo; Mora Amador, Raúl Alberto; Rojas Jiménez, Keilor; Martínez Cruz, María; Pieper, Dietmar H.; Chavarría Vargas, Max (2020-06-22)
      We describe the geochemistry and microbial diversity of a pristine environment that resembles an acid rock drainage (ARD) but it is actually the result of hydrothermal and volcanic influences. We designate this environment, ...

    • Parámetros físico-químicos en aguas costeras de la Isla del Coco, Costa Rica (2001-2007) 

      Acuña González, Jenaro; García Céspedes, Jairo; Gómez Ramírez, Eddy; Vargas Zamora, José A.; Cortés Núñez, Jorge (2008-11-17)
      Four cruises to Isla del Coco (Cocos Island), Costa Rica, were carried out in order to gather oceanographic data related to surface temperature, salinity, dissolved oxygen concentration, Secchi disk depth, nutrient ...

    • Phenolic variation among Chamaecrista nictitans subspecies and varieties revealed through UPLC-ESI(-)-MS/MS chemical fingerprinting 

      Quirós Guerrero, Luis Manuel; Albertazzi Castro, Federico José; Araya Valverde, Emanuel; Romero Chacón, Rosaura María; Villalobos Barrantes, Heidy M.; Poveda Álvarez, Luis Jorge; Chavarría Vargas, Max; Tamayo Castillo, Giselle (2019-01-19)
      Introduction Comparative analysis of metabolic features of plants has a high potential for determination of quality control of active ingredients, ecological or chemotaxonomic purposes. Specifically, the development of ...

    • Rapid shift in microbial community structure in a neutral hydrothermal hot spring from Costa Rica 

      Rojas Gätjens, Diego; Arce Rodríguez, Alejandro; Puente Sánchez, Fernando; Avendaño Vega, Roberto; Libby Hernández, Eduardo; Conejo Barboza, Geraldine; Mora Amador, Raúl Alberto; Rojas Jiménez, Keilor Osvaldo; Pieper, Dietmar H.; Chavarría Vargas, Max (2020)
      In this work, we characterize the geochemistry and microbial community of Bajo las Peñas, a neutral (pH 6.5-7.4), hot spring (T = 62.0-68.0°C) located near Turrialba Volcano, Costa Rica. The microbiota at its two sources ...

    • Three new species of Gliocephalotrichum causing fruit rot on different hosts from Brazil 

      Pereira de Almeida, Camila; da Silva, Rildo Alexandre Fernandes; Reis, Ailton; Mendes Aguiar, Frederick; Chaverri Echandi, Priscila; Batista Pinho, Danilo (2020-09-18)
      The genus Gliocephalotrichum (Nectriaceae), originally described as a soil-borne fungus, has been associated with postharvest diseases, especially of tropical fruits. Taxonomic studies using both morphological and molecular ...