Buscar
Mostrando ítems 21-30 de 69
Identification and Quantification of Microplastics in Effluents of Wastewater Treatment Plant by Differential Scanning Calorimetry (DSC)
(2022-04-20)
In this research, the presence of microplastics was detected through a differential scanning
calorimetry (DSC) analysis of three wastewater treatment plants. One of these plants applied
only a preliminary treatment stage ...
Experimental assessment of performance and emissions for hydrogen-diesel dual fuel operation in a low displacement compression ignition engine
(2022-04-01)
The combustion of pure H2 in engines is still troublesome, needing further research and development. Using H2 and diesel in a dual-fuel compression ignition engine appears as a more feasible approach. Here we report an ...
Condensation driven by a quantum phase transition
(2022-03-22)
The grand canonical thermodynamics of a bosonic system is studied in order to identify the footprint of its own high-density quantum phase transition. The phases displayed by the system at zero temperature establish ...
Resolución de problemas en química: descifrando métodos, errores, obstáculos, temáticas y aplicabilidad usando N-Vivo
(2022-02-15)
El alcance de esta investigación fue identificar los métodos, los errores y los obstáculos reconocidos por los estudiantes, y las temáticas y la aplicabilidad que los profesores le otorgan a la resolución de problemas en ...
Demanda de servicios y posgrados de salud en la Región Caribe de Colombia y en Bogotá D.C.
(2022-02-06)
El objetivo de este estudio es analizar la importancia que tienen los programas formativos de posgrado en el área de la salud para la satisfacción de la demanda de servicios de salud en Colombia. Se comparan la oferta de ...
Synthesis of 3-Aroyl-4-heteroarylpyrrole Derivatives by the Van Leusen Method
(2022-02-15)
The synthesis and structural diversification of N-heterocycles systems have attracted much
attention because of their potential applications. Three 6-aryl-3-methyl-1-phenyl-1H-pyrazolo[3,4-
b]pyridine-5-carbaldehyde 4 ...
Soil macrofauna, mesofauna and microfauna and their relationship with soil quality in agricultural areas in northern Colombia: ecological implications
(2022-07-15)
Soil fauna is an essential component of the soil ecosystem for maintaining nutrient
cycling and biological soil fertility. This study assessed the soil biodiversity (macrofauna,
mesofauna, and microfauna) to define ...
High-Intensity Ultrasound-Assisted Extraction of Pectin from Mango Wastes at Different Maturity
(2022-07-15)
Valorisation of food processing by-products is a welcome and developing area. The mango processing industry produces 40% to 60% of the fruit as solid waste, in which components of industrial interest, such as pectin, are ...
El derecho natural en la constitución política de Colombia, una visión desde los postulados de Javier Hervada
(2022-06-20)
La pluralidad temática y la prolijidad de los textos y reconocimientos que se integran en la Constitución Política de Colombia de 1991 permiten que a esta se le estudie y considere desde diversas ópticas y criterios tanto ...
Lógica Matemática con aplicaciones
(2022-01-28)
Esta obra sobre la lógica matemática fue diseñada como una guía de estudio para los estudiantes y docentes universitarios que estén cursando o necesiten aplicar los tópicos fundamentales de la lógica. Los conceptos, ejemplos ...