Claudia Patrícia Bravo-Chaucanés, Yerly Vargas‐Casanova, Luis Carlos Chitiva, Andrés Ceballos-Garzón, Geison M. Costa, Claudia M. Parra-Giraldo,
Due to the increased incidence of fungal infections and the emergence of antifungal resistance mainly by Candida species, the need for safe and effective novel therapies is imperative. Consequently, plants and herbs are a powerful source to combat infections. Here, we evaluated the anti-Candida potential of an ethanolic extract from Piper nigrum. The phytochemical analysis of P. nigrum revealed bioactive compounds such as alkaloids, terpenoids, and tannis. Our results showed that P. nigrum extract ...
Tópico(s): Essential Oils and Antimicrobial Activity
2022 - Multidisciplinary Digital Publishing Institute | Journal of Fungi
Juan Sebastián Gómez-Chitiva, Andrés Felipe Escalante-Sarrias, Oscar Danilo Montoya,
This article addresses the problem regarding power regulation in classical DC-DC second-order converters by means of a nonlinear control technique based on inverse optimal control theory. There are few papers that describe inverse optimal control for DC-DC converters in the literature. Therefore, this study constitutes a contribution to the state of the art on nonlinear control techniques for DC-DC converters. In this vein, the main objective of this research was to implement inverse optimal control ...
Tópico(s): Multilevel Inverters and Converters
2022 - Metropolitan Technological Institute (Medellin) | TecnoLógicas
Tatiana García Díaz, Ana Lúcia Teodoro, Iván Camilo Ospina Rojas, Andrés Felipe Pachón Chitiva, Jairo Andrés Pardo Guzman,
Tópico(s): Plant Micronutrient Interactions and Effects
2015 - Editora MV Valero | PubVet
Produção Nacional
Revisado por pares
Tatiana García Díaz, Ana Lúcia Teodoro, Iván Camilo Ospina Rojas, Andrés Felipe Pachón Chitiva, Jairo Andrés Pardo Guzman,
Copper is an essential trace element for all living organisms. Their biological, functional and structural importance is related to the metabolic functions of cupro-dependent enzymes such as, cytochrome C oxidase, lysyl oxidase, superoxide dismutase, among others, which catalyze important physiological reactions related to breathing biosynthesis melanin metabolism of dopamine, iron homeostasis and antioxidant defense. To be involved in the oxidation mechanism, deficiency of copper produces disorders ...
Tópico(s): Trace Elements in Health
2015 - Editora MV Valero | PubVet
Javier Andrés Matulevich Peláez, William Cardona, Luis Carlos Chitiva, Edwin Antonio Flórez Díaz,
A partir de hojas frescas de la especie vegetal Senna reticulata (Fabaceae) se obtuvo el aceite esencial mediante la técnica de extracción por arrastre de vapor; la identificación y composición química se realizó por medio de cromatografía de gases acoplada a espectrometría de masas (CG-EM), comparación de los índices de retención (IR) y los datos reportados en la literatura. El aceite esencial se obtuvo con un rendimiento del 0.10% en peso, en el cual se identificaron 20 compuestos correspondientes ...
Tópico(s): Coconut Research and Applications
2017 - | Revista Facultad de Ciencias Básicas
Hernán Paz Penagos, Marco Andrés Ortiz Niño, Johnny Alexander Arévalo López, Karol Milena Chitiva Medellín,
This paper presents an experience with integrating projects in Engineering education, developed using the CDIO methodology: conception, design, implementation and operation. The methodology is student centered with guidance by a professor, and aims to promote the development of autonomous learning with responsibility and interdisciplinarity.This study follows the process experienced by three students in their last semester of Electronic Engineering, who were research assistants in a project funded ...
Tópico(s): Higher Education Teaching and Evaluation
2015 - Universidad de Los Andes | Voces y Silencios Revista Latinoamericana de Educación
Javier Andrés Matulevich Peláez, William Fernando Castrillón-Cardona, Luis Carlos Chitiva,
El propósito de este trabajo fue contribuir al estudio fitoquímico de las hojas de esta especie y evaluar su capacidad antioxidante. Para tal fin, a partir del material vegetal colectado en el municipio de Honda (Tolima) e identificado en el Herbario Nacional Colombiano bajo el número de colección COL 573012, se obtuvo el extracto etanólico (131.18 g) del cual a través de separaciones por cromatografías en columna (CC), cromatografía en capa delgada (CCD) y cromatografía en capa delgada preparativa ( ...
Tópico(s): Essential Oils and Antimicrobial Activity
2017 - District University of Bogotá | Revista Científica