Results: 135

Kinetic characterization and modeling of a microalgae consortium isolated from landfill leachate under a high CO2 concentration in a bubble column photobioreactor

BACKGROUND: The determination of kinetic parameters and the development of mathematical models are of great interest to predict the growth of microalgae, the consumption of substrate and the design of photobioreactors focused on CO2 capture. However, most of the models in the literature have been develop...

Morphogenesis of Cynodon cultivars fertilized with nitrogen

Biosci. j. (Online); 36 (2), 2020
Toevaluate the biomass flow of two cultivars of Cynodon (Tifton 85 grass and vaquero grass) fertilized with increasing levels of nitrogen (N) (control – without nitrogen; 200; 400 and 600 mg dm-3) under greenhouse conditions, this study was carried out, in a completely randomized design, w...

Management of nitrogen fertilization on agronomic and nutritional characteristics in second crop corn

Biosci. j. (Online); 36 (2), 2020
Fertilization management, mainly nitrogen, is one of the factors that most directly affect corn grain yield. Nitrogen dynamics in the soil is quite complex and its main source currently used in corn production, the urea, undergo intense losses in its conventional form, mainly ...

Nutritional assessment in chronic kidney disease: the protagonism of longitudinal measurement

J. bras. nefrol; 42 (1), 2020

Forms of nitrogen fertilizer application in Panicum maximum

Biosci. j. (Online); 36 (1), 2020
Nitrogen is one of the most important nutrients for increasing the yield and quality of forages. This study aimed to evaluate the effect of the different forms of application, spread on the total area using urea fertilizer and foliar using liquid urea, aiming at evaluating the yield and qualitative trait...

Gas exchange in Massai grass fertilized with nitrogen and grazed by sheep

Biosci. j. (Online); 36 (1), 2020
The knowledge of gas exchanges in forage plants is essential for a better understanding of the process of forage biomass production in pasture. This study evaluated the gas exchange in massai grass fertilized with increasing levels of nitrogen fertilizer (control - without nitrogen fertilizer; 400; 800 a...

Metabolic stress and reproductive features in post-partum goats supplemented for a long period with detoxified castor meal as the source of dietary nitrogen

This study evaluated the effect of detoxified castor meal on the reproductive performance, metabolic stress, milk production, and kid development in peripartum goats. The diet of the animals were with (DCM, n= 20) or without (WDCM, n= 21) detoxified castor meal during the entire gestation and until weani...

Levels and degradability of crude protein in digestive metabolism and performance of dairy cows

Two experiments were conducted to evaluate the effect of the level and degradability of crude protein (CP) on the digestive metabolism and productive performance of dairy cows. In both experiments, 15 Holstein cows with 585 ± 40 kg of body weight were distributed in a Latin square design with five conte...

Dinámica del consumo y aporte de nutrientes de fitoplancton, dominado por Microcystis sp. (Cyanophyceae) del lago de Amatitlán

Cienc. tecnol. salud; 7 (1), 2020
El impacto antrópico cercano al lago de Amatitlán ha generado niveles altos de eutrofización que conllevan cambios en la dinámica del ecosistema. Uno de ellos es la proliferación de cianobacterias del género Microcystis que pueden llegar a ser perjudiciales para la fauna y flora de lugar e incluso ...

Evaluación anual del fitoplancton y su respuesta a la calidad de agua en el lago de Amatitlán, Guatemala

Cienc. tecnol. salud; 7 (2), 2020
Se realizó un estudio sobre la composición y abundancia del fitoplancton en el lago de Amatitlán, y el efecto de la calidad de agua sobre su biodiversidad. Para ello, se colectaron muestras de agua en cuatro puntos específicos del lago, en la superficie del agua y a profundidades de 5, 10 y 20 m, de ...