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Actividad hemolítica de la Anémona Marina Aiptasia pallida (Cnidaria: Actiniaria: Actiniidae) de Costa Rica
(Tecnológico de Costa Rica (TEC) (Costa Rica), 2017)El filo Cnidaria incluye organismos considerados dentro de los más venenosos en la naturaleza. Más específicamente, alrededor de 32 especies de anémonas marinas han sido reportadas como productoras de péptidos y proteínas ... -
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, ... -
Calidad fisicoquímica y microbiológica del agua superficial del río Grande de Tárcoles, Costa Rica: un enfoque ecológico
(Universidad Estatal a Distancia (Costa Rica), 2021-06)Introducción: La calidad del agua en una cuenca hidrográfica, y su uso potencial, se ven afectados por factores antrópicos y naturales. El río Tárcoles es el receptor final de aguas de la región central de Costa Rica, donde ... -
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 ... -
Cloning, purification and characterization of nigrelysin, a novel actinoporin from the sea anemone Anthopleura nigrescens
(Elsevier B.V., 2019)Actinoporins constitute a unique class of pore-forming toxins found in sea anemones that being secreted as soluble monomers are able to bind and permeabilize membranes leading to cell death. The interest in these proteins ... -
Environmentally relevant concentrations of silver nanoparticles diminish soil microbial biomass but do not alter enzyme activities or microbial diversity
(Elsevier B.V., 2020-06-05)The increasing use of silver nanoparticles (AgNPs) due to their well-known antimicrobial activity, has led to their accumulation in soil ecosystems. However, the impact of environmental realistic concentrations of AgNPs ... -
Evaluación de la producción de proteasas en dos cepas de Mucor sp. Por fermentación sumergida empleando dos tipos de medio de cultivo
(Universidad Nacional (Costa Rica), 2010)Los hongos se caracterizan por su capacidad de producción y secreción de enzimas al medio externo. Las especies del género Mucor son microorganismos importantes en la producción de proteasas. En este trabajo se investigó ... -
Evaluación de los parámetros físicos y químicos del agua de mar en los alrededores de la Isla Uvita, Limón, Costa Rica
(Instituto Tecnológico de Costa Rica, 2021-04)El presente trabajo evaluó una serie de parámetros físicos y químicos para determinar la calidad del agua marina en los alrededores de la isla Uvita, Limón, Costa Rica, y determinar la posible influencia de las descargas ... -
Extracción, identificación y prueba microbiológica del agar extraído de Gracilaria fortissima dawson (rhodophyta, gigartinales, gracilariaceae)
(Universidad Nacional (Costa Rica), 2008)A la especie de alga marina Gracilaria fortissima Dawson, recolectada en el Parque Nacional Cahuita, Limón, Costa Rica, se le realizaron los siguientes procedimientos: un análisis de oligoelementos que presentó los siguientes ... -
Fuentes terrestres de contaminación que impactan la zona marino-costera del Golfo de Papagayo, Costa Rica
(Universidad Nacional (Costa Rica), 2019-07)El Golfo de Papagayo, en los últimos años, ha experimentado un acelerado desarrollo socioeconómico que puede ejercer presión sobre sus espacios y recursos naturales, y contribuir, así, al deterioro de su zona ... -
Fungal Extracellular Lipases from Coffee Plantation Environments for the Sustainable Management of Agro-Industrial Coffee Biomass
(Multidisciplinary Digital Publishing Institute (Suiza), 2022-03-22)Coffee wastes have large amounts of by-products rich in phenolic compounds such as chlorogenic and caffeic acid, with potential applications for developing fine chemicals such as caffeic acid phenethyl ester (CAPE). A ... -
Horizontal transport and seasonal distribution of nutrients, dissolved oxygen and chlorophyll-a in the Gulf of Nicoya, Costa Rica: a tropical estuary
(Elsevier, 2002)The distributions of salinity, temperature, nutrients, dissolved oxygen and chlorophyll-a (chl-a) concentrations in the Gulf of Nicoya, Costa Rica, during the rainy and dry seasons are presented. In the rainy season, the ... -
Isotopic composition in precipitation and groundwater in the northern mountainous region of the Central Valley of Costa Rica
(Taylor & Francis, 2016)The linkage between precipitation and recharge is still poorlyunderstood in the Central America region. This study focuses onstable isotopic composition in precipitation and groundwater in the northern mountainous region ... -
Microhabitat heterogeneity associated with Vanilla spp. and its influences on the microbial community of leaf litter and soil
(Springer Nature, 2020-09)The impact of forest microhabitats on physiochemical properties of the soil and that of microbial communities on tropical soils remain poorly understood. To elucidate the effect of tropical forest stand on leaf litter ... -
Organic amendments exacerbate the effects of silver nanoparticles on microbial biomass and community composition of a semiarid soil
(Elsevier, 2020-11-20)Increased utilization of silver nanoparticles (AgNPs) can result in an accumulation of these particles in the environment. The potential detrimental effects of AgNPs in soil may be associated with the low fertility of soils ... -
Physical, chemical, and biological treatment of chemical waste from teaching laboratories at Universidad Nacional, Costa Rica
(Universidad Nacional, Costa Rica, 2020-07-31)Herein, we report the physical, chemical, and biological treatment of wastewater generated in the teaching laboratories at Universidad Nacional, Costa Rica. Initial physicochemical treatment included neutralization and ... -
What do we Think About Water?Public Perception of the Current Situation of Water Resources in Costa Rica: an Indicator of Water Understanding and Management
(Universidad Nacional (Costa Rica), 2020-01-31)The objective of this research was to determine the level of knowledge and perception of the Costa Rican population about water for human consumption, general concepts, the impact of human activities, the ...