Guillermo Correa Londoño
National University of Colombia
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Publication
Featured researches published by Guillermo Correa Londoño.
International Journal of Polymer Science | 2016
Javier Ricardo Gómez Cardozo; Amanda Lucía Mora Martínez; María del Socorro Yepes Pérez; Guillermo Correa Londoño
Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible plastics. They are synthesized by a wide variety of microorganisms (i.e., fungi and bacteria) and some organisms such as plants, which share characteristics with petrochemical-based plastics. The most recent studies focus on finding inexpensive substrates and extraction strategies that allow reducing product costs, thus moving into a widespread market, the market for petroleum-based plastics. In this study, the production of polyhydroxybutyrate (PHB) was evaluated using the native strains, Bacillus megaterium, Bacillus sp., and Lactococcus lactis, and glycerol reagent grade (GRG), residual glycerol (RGSB) byproduct of biodiesel from palm oil, Jatropha oil, castor oil, waste frying oils, and whey as substrates. Different bacteria-substrate systems were evaluated thrice on a laboratory scale under different conditions of temperature, pH, and substrate concentration, employing 50 mL of broth in 250 mL. The bacterial growth was tested in all systems; however, the B. megaterium GRG system generated the highest accumulation of PHA. The previous approach was allowed to propose a statistical design optimization with RGSB (i.e., RGSB, 15 g/L, pH 7.0, and 25°C). This system reached 2.80 g/L of PHB yield and was the optimal condition tested; however, the optimal biomass 5.42 g/L occurs at pH 9.0 and 25°C, with a substrate concentration of 22 g/L.
Biotecnoloía en el Sector Agropecuario y Agroindustrial | 2017
Edinsón Elicer Bejarano Toro; José Uriel Sepúlveda Valencia; Guillermo Correa Londoño
The quesito antioqueno (QA), fresh, soft, milled and salty cheese, without added bacteria. This cheese contains 2,1% of sodium chloride. Were supplemented with Bifidobacterium lactis (bb12) and It was salty with NaCl (Q1) and some mixtures of NaCl/KCl (3:1 (Q2)) and 1:1 (Q3), w/w), to reduce the sodium content and give probiotic characteristics. There were no significant differences between treatments (Q1, Q2 and Q3) (P>0,05) in some compositional (moisture, MG/MS, total protein, ash, acidity), chemical (pH) and physical (hardness, adhesiveness, springiness, cohesiveness, gumminess, chewiness, resilience) characteristics. A significant difference was observed by storage time in moisture, pH, protein content and acidity (P<0,05). With respect to Na and K content, there was a significant differences between treatments (P<0,05) but was not in the Ca content. In Q2 the Na level was decreased 24,2% and K increased 143% in average; in Q3 the Na level was decreased 48,3% and K increased 311%. The processed QA with 50% of Na substitution maintains the traditional compositional a physicochemical characteristics, therefore, according to this investigation results, can be performed this substitution and it is an excellent matrix to include probiotics in the people diet.
CES Medicina Veterinaria y Zootecnia | 2013
Isabel Cristina Molina Botero; Juan Manuel Cantet; Sebastián Montoya; Guillermo Correa Londoño; Rolando Barahona Rosales
Revista Facultad Nacional de Agronomía | 2007
Guillermo Correa Londoño; Lelia Leonor Lavalett Oñate; María Purificación Galindo Villardón; Lucía Afanador Kafuri
Revista Facultad Nacional de Agronomía Medellín | 2012
Luisa Fernanda Torres Jaimes; Guillermo Correa Londoño; José Régulo Cartagena Valenzuela; Danilo Augusto Monsalve García; Martha Eugenia Londoño Zuluaga
Revista Brasileira De Zootecnia | 2017
Ariel Marcel Tarazona Morales; María C Ceballos; Guillermo Correa Londoño; César Augusto Cuartas Cardona; Juan Fernando Ramírez; Mateus José Rodrigues Paranhos da Costa
Revista Iberoamericana de Tecnología Postcosecha | 2014
Germán Franco; José Régulo Cartagena Valenzuela; Guillermo Correa Londoño; Benjamín Alberto Rojano; Ana María Piedrahita Correa; Mario Lobo Arias
Revista Facultad Nacional de Agronomía, Medellín | 2013
Juan Diego Rodríguez Neira; Guillermo Correa Londoño; José Julián Echeverri Zuluaga
Revista Facultad Nacional de Agronomía - Medellín (Colombia) Num.2 Vol.66 | 2013
Carlos Julio Márquez Cardozo; José Régulo Cartagena Valenzuela; Guillermo Correa Londoño
Revista Colombiana De Ciencias Pecuarias | 2012
José Jaime García González; Guillermo Correa Londoño; Sandra Pardo-Carrasco