Browsing Artículos científicos by Title
Now showing items 31-50 of 254
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Base de datos sobre la calidad del agua superficial en río Bermúdez
(Universidad Nacional (Costa Rica), 2021-06-21) -
Baseflow recession analysis in the inland Pacific Northwest of the United States
(Springer Nature, 2015)The storage-discharge relationships of 26 water sheds in the inland Pacific Northwest of the United States were analyzed. Four fitting methods were used to obtain the baseflow coefficients: lower envelope, organic corre ... -
Bayesian estimates of the mean recharge elevations of water sources in the Central America region using stable water
(Elsevier, 2020)Study region: Central America. Study focus: Knowledge of the mean recharge elevation (MRE) of water resources is important where water resources are vulnerable. The purpose of this study was to develop and apply a Bayesian ... -
Biocomposite Films of Polylactic Acid Reinforced with Microcrystalline Cellulose from Pineapple Leaf Fibers
(Tech Science Press, 2019)Poly(lactic acid) (PLA) composite films reinforced with microcrystalline cellulose (MCC) extracted from pineapple leaf fibers (PALF) were prepared by a solution casting procedure. In an attempt to improve the interaction ... -
Biodegradable polyurethanes from sugar cane biowastes
(Cellulose chemistry and technology, 2011)In a previous work, it was demonstrated that 70% of the molasses isolated from the biowaste generated by the agro-industrialization of sugar cane allow obtaining composite materials with adequate mechanical properties ... -
Biofabrication of Gold Nanotriangles Using Liposomes as a Dual Functional Reductant and Stabilizer
(American Chemical Society, 2021-03-23)Negatively charged liposomes accomplished both functions as a reducing and stabilizing agent in the synthesis of gold nanotriangles (GNTs). Liposomes are based on a mixture of phospholipids phosphatidylcholine/phosphoglycerol, ... -
Biogardens as constructed wetlands in tropical climate: A case study in the Central Pacific Coast of Costa Rica
(Elsevier, 2019-03-25)In Costa Rica, <10% of wastewater is treated before its discharge. This generates a significant impact on the environment, public health, and tourism industry, which is one of the country's main economic activities. ... -
Biogenic silica-based microparticles obtained as a sub-product of the nanocellulose extraction process from pineapple peels
(Nature Publishing Group, 2018-07-10)Silica in plant tissues has been suggested as a component for enhancing mechanical properties, and as a physical barrier. Pineapples present in their shell and bracts rosette-like microparticles that could be associated ... -
Bioguided Phytochemical Study of Ipomoea cairica Extracts with Larvicidal Activity against Aedes aegypti
(MDPI, 2022-02-16)Vector-borne diseases, such as those transmitted by Aedes aegypti, are a constant threat to inhabitants of tropical regions of the planet. Synthetic chemicals are commonly used as a strategy to control them; however, ... -
Biorefinería de los subproductos agrícolas de ñame (Dioscorea alata): Obtención de fructanas con potencial aplicación en la industria alimentaria
(Universidad del País Vasco (España), 2020-11)La actividad agrícola de Costa Rica es de vital importancia para el desarrollo económico del país. Recientemente, este sector ha incrementado su presencia con los cultivos no tradicionales, como las raíces y tubérculos, ... -
Biorefinery of Biomass of Agro-Industrial Banana Waste to Obtain High-Value Biopolymers
(Multidisciplinary Digital Publishing Institute (MDPI) (Suiza), 2020)On a worldwide scale, food demand is increasing as a consequence of global population growth. This makes companies push their food supply chains’ limits with a consequent increase in generation of large amounts of untreated ... -
Biosensors for the Detection of Bacterial and Viral Clinical Pathogens
(MDPI AG, 2020-12-04)Biosensors are measurement devices that can sense several biomolecules, and are widely used for the detection of relevant clinical pathogens such as bacteria and viruses, showing outstanding results. Because of the latent ... -
Botos Lagoon, Poás Volcano National Park, Costa Rica – Consumer drones in professional research
(Advanced UAV, 2023)The International Union of Geological Sciences designated the Poás Volcano National Park in Costa Rica one of the top 100 sites for geological importance in the world. This was announced on the World Geological Heritage ... -
Calidad del agua de los ríos de la microcuenca IV del Río Virilla
(Universidad Nacional (Costa Rica), 2010)En la evaluación de la calidad del agua de los cauces de los Ríos Tibás, Lajas, Tranqueras y Tures de la Microcuenca IV del Río Virilla se aplicaron dos índices basados en parámetros físicos, químicos y bacteriológicos con ... -
Calidad del agua superficial y presiones socioambientales en la microcuenca alta del río Poás
(Universidad Nacional (Costa Rica), 2022-03-10)El objetivo de esta investigación fue determinar la relación entre la calidad del agua superficial en la parte alta de la microcuenca del río Poás y las principales presiones socioambientales que pueden alterar ... -
Caracterización estructural de vesículas modificadas con quitosano
(Universidad Nacional (Costa Rica), 2018-01-31)Vesículas a base de L-α-fosfatidilcolina (PC) y mezclas de PC/fosfogliceroles fueron caracterizadas por medio de dispersión de luz dinámica (DLS), microscopía electrónica de barrido-criogénico (Cryo-SEM) y ... -
Caracterización química de algunos desechos agroindustriales de Costa Rica
(Universidad Nacional [Costa Rica ], 1998-01-01)Se caracterizó químicamente las cáscaras de la piña y el aserrín de madera, la cascarilla de arroz, la brosa y el pergamino del café y se procedió a la separación de la lignina y la celulosa. Los análisis I R realizados ... -
Carácteres generales, edad y crecimiento de anadara grandis (Pelecypoda Arcidae)
(Universidad Nacional (Costa Rica), 1986-01-01)Cálculos en el porcentaje de carne por peso análisis de la estructura poblacional de Anadara grandis se realizó entre abril de 1984 y marzo de 1985. El valor promedio del porcentaje de carne fue de 10,93 con un valor ... -
Characterization and applications of silver nanoparticles-decorated electrospun nanofibers loaded with polyphenolic extract from rambutan (Nepelium lappaceum)
(Elsevier B.V., 2020-05)Rambutan (Nephelium lappaceum) is a traditional fruit originally from Asia and now widely available in Central America. The rind of rambutan is rich in antioxidants, especially polyphenols, which have natural anti-inflammatory ... -
Characterization of surface water isotope spatial patterns of Scotland
(Elsevier B.V., 2018-07-24)The extended National Waters Inventory of Scotland (NWIS) monitoring network in combination with an extensive, supplementary low flow sampling campaign was used to create isoscapes of surface water for management purposes ...