Introducción: Los páramos de Boyacá cubren el 18.3 % de la superficie de Colombia, y son diversos en flora y fauna, además, registran una alta variabilidad climática, topográfica y de hábitats, que permite que estos ecosistemas sean centros de diversidad en el Neotrópico, y por tanto albergan una...
Abstract Guarana (Paullinia cupana) is a native plant from the Amazon whose seeds contain a high concentration of caffeine. Aqueous extract of guarana is widely used in the world. In this study, the objective was to develop and validate a High-Performance Liquid Chromatography method for the determinatio...
Nordihydroguaiaretic acid (NDGA) is a natural product obtained by the alkaline extraction of dried plants of Larrea tridentata species. Due to the biological properties presented, such as antioxidant, anti-inflammatory, antiviral and cytotoxic capacity, this compound is being increasingly studied. In thi...
Masoprocol/análisis,
Fenómenos Químicos,
Antioxidantes/farmacología,
Antivirales/farmacología,
Hipoglucemiantes/farmacología,
Modelos Animales,
Neoplasias,
Plantas/clasificación,
Productos Biológicos/análisis,
Toxicidad,
Técnicas In Vitro/métodos
Abstract Solanum dolichosepalum is a plant with anti-infective effects. It is a healing agent and has ethnopharmacological uses. In this study, the antifungal activity of extracts and fractions of this species on C. albicans and F. oxysporum was evaluated. The antioxidant activity was measured using the ...
Abstract Flavonoids are a diverse class of polyphenolic substances largely found in plants including citrus peels and are reported to posess a variety of biological activities. We investigated important flavonoids apigenin, hesperidin, narigin, quercetin and tangeritine against diabetes and associated co...
Las mariposas de la tribu Ithomiini son uno de los modelos biológicos más estudiados en años recientes en trabajos de biogeografía, taxonomía y evolución. Sin embargo, aun cuando la biología y distribución de sus especies es mejor conocida que la de otros grupos de mariposas, existen aspectos de ...
Abstract The expression of chemical compounds by individual plants of the same species in different locations may be affected by abiotic factors resulting in differences in the production of allelopathic compounds. The objective of this study was to compare the phytochemical profiles of plant species fr...
Abstract We used 16S rRNA sequencing to assess the archaeal communities across a gradient of Cerrado. The archaeal communities differed across the gradient. Crenarcheota was the most abundant phyla, with Nitrosphaerales and NRPJ as the predominant classes. Euryachaeota was also found across the Cerrado g...
Archaea/clasificación,
Archaea/genética,
Archaea/crecimiento & desarrollo,
Archaea/aislamiento & purificación,
Biodiversidad,
Brasil,
Filogenia,
Desarrollo de la Planta,
Plantas/clasificación,
Plantas/microbiología,
Suelo/química,
Microbiología del Suelo
ABSTRACT The Brazilian Pantanal is an extensive wetland with heterogeneous habitats, primarily due to the river-floodplain system and plants with differential adaptations and reproductive strategies. Factors such as altitude, distance among plant formations, and flood pulse must be considered to better u...
Altitud,
Análisis de Varianza,
Biodiversidad,
Brasil,
Inundaciones,
Dispersión de las Plantas/fisiología,
Plantas/clasificación,
Ríos,
Estaciones del Año,
Especificidad de la Especie,
Clima Tropical,
Humedales
Abstract In Cerrado, studies of post-fire vegetation recovery show that some herbaceous species are able to flower shortly after fires. However, these were mainly short-term studies that focused on grasslands and savannas. Little is known about the effects of fire on ground layer of forests that border t...
