• Location of the zeros of certain parametric families of functions of generalized Fresnel integral type 

  Lobo Segura, Jaime; Villalobos Arias, Mario (2019)

  In this paper, two parametric families of functions, the so-called Complementary Fresnel Integral and the Lommel type, which are of generalized Fresnel integral type, are considered. We review the problems of existence ...

• Using eDNA to determine the source of organic carbon in seagrass meadows 

  Reef, Ruth; Atwood, Trisha B.; Samper Villarreal, Jimena; Adame, Maria Fernanda; Sampayo, Eugenia M.; Lovelock, Catherine E. (2017)

  Seagrasses sequester globally significant amounts of carbon (C), which is stored mainly in the sediment. BothC fixation by the seagrass (autochthonous) and the trapping of organic matter that is derived from outside ...

• Eastern Pacific 

  Ruiz Robinson, Néstor Manuel; Fernández García, Cindy; Riosmena Rodríguez, Rafael; Rosas Alquicira, Edgar F.; Konar, Brenda; Chenelot, Heloise; Jewett, Stephen C.; Melzer, Roland R.; Meyer, Roland; Försterra, Günter; Häussermann, Vreni; Macaya, Erasmo C. (2017)

  In the Eastern Pacific (EP) the only region where rhodolith beds have been well studied in terms of taxonomy, ecology, distribution and conservation status is the Gulf of California. Outside this region the knowledge of ...

• Tolerance and sorption of Bromacil and Paraquat by thermophilic cyanobacteria Leptolyngbya 7M from Costa Rican thermal springs 

  Brenes Guillén, Laura; Fuentes Schweizer, Paola; García Piñeres, Alfonso J.; Uribe Lorío, Lorena (2019)

  We studied the adsorption ability and tolerance of the thermophilic filamentous cyanobacteria Letolyngbya 7M towards Paraquat and Bromacil. Adsorption isotherms at pH = 7.0 showed an adsorption capacity of 24.4 mg/g and ...

• A Salinity Threshold Separating Fungal Communities in the Baltic Sea 

  Rojas Jiménez, Keilor Osvaldo; Rieck, Angelika; Wurzbacher, Christian; Jürgens, Klaus; Labrenz, Matthias; Grossart, Hans-Peter (2019)

  Salinity is a significant factor for structuring microbial communities, but little is known for aquatic fungi, particularly in the pelagic zone of brackish ecosystems. In this study, we explored the diversity and composition ...

• Las partículas elementales según Wigner: aspectos clásicos y cuánticos 

  Várilly Boyle, Joseph C. (2019)

  En 1939, Wigner clasificó las representaciones unitarias irreducibles del grupo de Poincaré; desde entonces, tales representaciones se identifican con partículas con simetría relativista. Se conocen las representaciones ...

• 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 J. (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 ...

• The contrasting roles of aquatic fungi and oomycetes in the degradation and transformation of polymeric organic matter 

  Masigol, Hossein; Khodaparast, Seyed Akbar; Woodhouse, Jason Nicholas; Rojas Jiménez, Keilor Osvaldo; Fonvielle, Jeremy; Rezakhani, Forough; Mostowfizadeh Ghalamfarsa, Reza; Neubauer, Darshan; Goldhammer, Tobias; Grossart, Hans-Peter (2019)

  Studies on the ecological role of fungi and, to a lesser extent, oomycetes, are receiving increasing attention, mainly due to their participation in the cycling of organic matter in aquatic ecosystems. To unravel their ...

• Coral Reef Conservation in the Eastern Tropical Pacific 

  Alvarado Barrientos, Juan José; Aburto Oropeza, Octavio; Abad Godoy, Rubén Darío; Barraza Sandoval, José Enrique; Brandt, Margarita; Cantera Kintz, Jaime Ricardo; Estrada, Priscilla; Gaymer, Carlos F.; Guzmán Mora, Ana Gloria; Herlan, James J.; Maté, Juan L. (2017)

  This chapter reviews and evaluates coral reef conservation strategies along the eastern tropical Pacific (ETP), a narrow biogeographic region on the Pacific American coast that extends from southern Baja California, Mexico ...

• Human Influences On Eastern Tropical Pacific Coral Communities and Coral Reefs 

  Cortés Núñez, Jorge; Reyes Bonilla, Héctor (2016)

  Coral reefs world-wide have been impacted by direct and indirect human activity and natural disturbances. This has led to the degradation and disappearance of many reef structures. On a basin-wide scale, the natural impact ...

• Large-scale climatic phenomena drive fluctuations in macroinvertebrate assemblages in lowland tropical streams, Costa Rica: The importance of ENSO events in determining long-term (15y) patterns 

  Gutiérrez Fonseca, Pablo E.; Ramírez Ulate, Luis Alonso; Pringle, Catherine M. (2019-02-08)

  Understanding how environmental variables influence the distribution and density of organisms over relatively long temporal scales is a central question in ecology given increased climatic variability (e.g., precipitation, ...

• Producción de un detergente líquido ambientalmente preferible y estrategia de lanzamiento al mercado del Valle Central Occidental de Costa Rica 

  García Céspedes, Jairo (2009)

  Se determinó la viabilidad de instalar una empresa de productos químicos preferibles para el ambiente, en el cantón de Poás de Alajuela, Costa Rica. Con este propósito se seleccionó una formulación de un detergente líquido ...

• Paleontología de una sección del río Corredores, formación Curré, Mioceno, Costa Rica 

  Aguilar Álvarez, Teresita; Acevedo Peralta, Benjamín; Ulloa Carmiol, Andrés (2010)

  En una sección del río Corredores aflora una secuencia de areniscas finas a gruesas en estratos (dm-m) subverticales orientados predominantemente N-S. Se reconocieron 43 especies de moluscos, crustáceos, fragmentos de ...

• El arrecife coralino de Punta Cocles, costa Caribe de Costa Rica 

  Fernández García, Cindy; Alvarado Barrientos, Juan José (2004)

  This paper describes the Punta Cocles reef (Limón, Costa Rica). Data were obtained by sampling nine transects along the coast and observations done by skin diving between September and November of 2002.This reef consist ...

• Formación Bagaces: caracterización de sus unidades para la identificación de depósitos y litofacies 

  Solano Monge, Juan Pablo; Denyer Chavarría, Percy; Pérez Fernández, Wendy; Lücke Castro, Oscar H.; Madrigal Quesada, María Del Pilar (2019-06-01)

  La base de la cordillera volcánica de Guanacaste está conformada, en su mayoría, por una potente secuencia de depósitos piroclásticos de edades entre el Mioceno y el Pleistoceno, las cuales corresponden a las formaciones ...

• Estructura del cono piroclástico Pasquí a partir de interpretación indirecta de datos de gravedad 

  Gutiérrez, Amalia; Solano Monge, Juan Pablo; Argüello Sáenz, Alejandro; Rivera Romero, Federico; Lücke Castro, Oscar H. (2019-06-01)

  El volcán Irazú presenta, en sus cuadrantes sur y oeste, numerosas estructuras relacionadas con antiguos focos de emisión de lavas y piroclastos fuera de su foco cuspidal. Una serie de estas estructuras se encuentra asociada ...

• Abundance of Petrolisthes armatus (Crustacea: Porcellanidae) on a tropical estuarine intertidal rocky beach, Gulf of Nicoya estuary, Costa Rica 

  Díaz Ferguson, Edgardo E.; Vargas Zamora, José A. (2016-09-22)

  Se estudió, de diciembre de 1997 a noviembre de 1998 (14 fechas), la población del cagrejo porcelánido Petrolisthes armatus en dos sitios en una playa rocosa de entre mareas en el Golfo de Nicoya, costa pacífica de Costa ...

• Reef flattening effects on total richness and species responses in the Caribbean 

  Newman, Steven P.; Meesters, Erik H.; Dryden, Charlie S.; Williams, Stacey M.; Sánchez, Cristina; Mumby, Peter J.; Polunin, Nicholas V. C. (2015-09-06)

  1. There has been ongoing flattening of Caribbean coral reefs with the loss of habitat having severe implications for these systems. Complexity and its structural components are important to fish species richness and ...

• The last step of the volcanic unrest in Turrialba volcano: a new stage of magmatic eruptions 

  González Ilama, Gino Steven; Mora Amador, Raúl Alberto; Ramírez Umaña, Carlos José; Lucchi, Federico; Rouwet, Dmitri; Forni, Francesca; Alpízar Segura, Yemerith (2015)

  In 1864-1866, Turrialba volcano had a strombolian eruption with some phases of phreatic and phreatomagmatic activity, that covered the Central Valley of Costa Rica with a variable thickness of ash. During this eruption, ...

• Especies de Thysanoptera en una localidad del Cerro de la Muerte en Costa Rica, Centro América 

  Soto Rodríguez, Gerardo Alcides; Retana Salazar, Axel P.; Rodríguez Arrieta, Jesús Alexander (2015)

  El estudio se llevó a cabo de Julio 2010 a Octubre 2013 en 10 hectáreas localizadas en el Cerro de la Muerte, Costa Rica, Centroamérica. Se tomaron muestras mensuales por el método de golpeo de la vegetación en 22 especies ...

View more