Search
Now showing items 451-460 of 556
Organic matter sedimentation and resuspension in tilapia (Oreochromis niloticus) ponds during a production cycle
(2002-07-01)
The rates of sedimentation and resuspension of organic carbon and total nitrogen were
measured in earthen fishponds, based on nutrient input, water quality parameters and fish size and biomass. Material collected in ...
A dynamic simulation model for the blooming of Oscillatoria agardhii in a monomictic lake
(Elsevier, 1995-01-15)
The occurrence of phytoplankton blooms is a common problem in water bodies. The quantitative description of the algal population growth is of primary importance to understand the mechanisms which lead to these phytoplankton ...
Optimización de técnicas de PCR para la detección de Salmonella enterica (serotipo Gallinarum) en aves de corral de Costa Rica
(UNED, 2022-02-21)
Introducción: La tifosis aviar y la pulorosis,
enfermedades ocasionadas por Salmonella enterica
subsp. enterica (serotipo Gallinarum, biotipos Gallinarum
y Pullorum), son responsables de una elevada mortalidad
en aves ...
Caracterización fenotípica y molecular, e influencia de medios de cultivo, en el crecimiento y emisión de luz de bacterias del litoral de La Habana, Cuba
(Universidad de Costa Rica, 2020-09-18)
Phenotypic and molecular characterization, and influence of culture media, on the growth and light emission of bacteria from the coast of Havana, Cuba. Introduction: The light-emitting enzyme complex of luminescent bacteria ...
Primer reporte de bacterias y dinoflagelados marinos luminiscentes del Parque Nacional Isla del Coco, Costa Rica
(Universidad de Costa Rica, 2020-03-24)
First report of marine luminescent bacteria and dinoflagellates from Isla del Coco National Park, Costa Rica. Introduction: Bioluminescence is the ability of certain organisms to transform chemical energy into light energy ...
Caracterización del sustrato y el agua intersticial del manglar de Mata de Limón, Puntarenas, Costa Rica
(Universidad Nacional (Costa Rica), 2023-01-09)
Los manglares son sistemas que mediante la interacción marino terrestre varían
durante el tiempo y son altamente productivos. El objetivo del estudio fue
describir la granulometría, parámetros fisicoquímicos y nutrientes ...
Assessment of methods for predicting eukaryotic promoter sequences
(IEEE, 2023)
Identifying promoters is challenging due to their short sequences, low conservation, and complex regulation. Historically, this was done through slow and expensive experimental methods. Efficient pattern recognition and ...
Insecticidal activity of ethanolic plant extracts on Aedes aegypti larvae
(Universidad Nacional (Costa Rica), 2023-06-01)
The objective of this study was to determine the larvicidal activity against A. aegypti of ethanolic extracts of plants commonly found in Costa Rica. [Methodology] Larvicidal activity of ethanolic extracts of plants was ...
Floristic composition and richness of urban domestic gardens in three urban socioeconomic stratifications in the city Heredia, Costa Rica
(Urban Ecosystems Vol.20 51-63, 2017)
The urban domestic gardens that are part of urban green areas have become a very important element due to their ecosystematic benefits and the poor information about them. Information regarding the floristic richness of ...
Áreas verdes urbanas, una caracterización paisajística y biológica aplicada a una microcuenca de la Gran Área Metropolitana de Costa Rica
(Universidad Nacional (Costa Rica), 2022-07-30)
Este artículo presenta una caracterización paisajística y biológica de las áreas verdes urbanas (AVU)
de la microcuenca del río Bermúdez, provincia de Heredia, Costa Rica. Esta caracterización se basa
en una clasificación ...