Sergio Valdivia-Rivera
@conahcyt.mx
Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C. (CIATEJ), Subsede Sureste
Consejo Nacional de Humanidades Ciencias y Tecnologías (CONAHCYT)
EDUCATION
Biotechnological Innovation Ph.D.
RESEARCH, TEACHING, or OTHER INTERESTS
Multidisciplinary, Food Science, Biotechnology, Pollution
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Sergio Valdivia-Rivera, Iván Emanuel Herrera-Pool, Teresa del Rosario Ayora-Talavera, Juan Carlos Cuevas-Bernardino, Ulises García-Cruz, Neith Pacheco, and Manuel Alejandro Lizardi-Jiménez
Elsevier BV
Sergio Valdivia-Rivera, Iván Emanuel Herrera-Pool, Teresa Ayora-Talavera, Manuel Alejandro Lizardi-Jiménez, Ulises García-Cruz, Juan Carlos Cuevas-Bernardino, José Manuel Cervantes-Uc, and Neith Pacheco
MDPI AG
The effect of temperature (60, 70, 80, and 90 °C) and time (30, 45, 60, 75, and 90 min) on citric acid extraction of Haden mango (Mangifera indica L. cv. Haden) peel pectin was evaluated in the present study. In order to obtain a better understanding of both the extraction process and the characteristics of the pectin (obtained from an agro-industrial waste) for a future scaling process, the following characterizations were performed: (1) Kinetic, with the maximum extraction times and yields at all evaluated temperatures; (2) thermodynamic, obtaining activation energies, enthalpies, entropies, and Gibbs free energies for each stage of the process; (3) physicochemical (chemical analysis, monosaccharide composition, degree of esterification, galacturonic acid content, free acidity, Fourier-transform infrared spectroscopy, thermogravimetric and derivative thermogravimetric analyses); and (4) economical, of the pectin with the highest yield. The Haden mango peel pectin was found to be characterized by a high-esterified degree (81.81 ± 0.00%), regular galacturonic acid content (71.57 ± 1.26%), low protein (0.83 ± 0.05%) and high ash (3.53 ± 0.02%) content, low mean viscometric molecular weight (55.91 kDa), and high equivalent weight (3657.55 ± 8.41), which makes it potentially useful for food applications.
Sergio Valdivia-Rivera, Teresa Ayora-Talavera, Manuel Alejandro Lizardi-Jiménez, Ulises García-Cruz, Juan Carlos Cuevas-Bernardino, and Neith Pacheco
Springer Science and Business Media LLC
N.U. García-Cruz, S. Valdivia-Rivera, L. Narciso-Ortiz, J.Q. García-Maldonado, M.M. Uribe-Flores, M.L. Aguirre-Macedo, and M.A. Lizardi-Jiménez
Elsevier BV
Sergio Valdivia-Rivera, Elizabeth del Carmen Varela-Santos, Tannia Alexandra Quiñones-Muñoz, Ricardo Hernández-Martínez, and Manuel Alejandro Lizardi-Jiménez
Springer Science and Business Media LLC
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Universidad Autonoma Metropolitana
A native-microbial biomass obtained from a contaminated site in Puebla, Mexico was evaluated to determine hydrocarbonoclastic capacities and solubilization strategies of Mayan crude oil. The biomass was able to use 13 g L-1 of Mayan crude oil as a single carbon source in a bubble column reactor during 14 days period. Gompertz model was chosen as the best fit for the profiles of growth and hydrocarbon consumption. The microbial biomass achieved removal efficiencies of 70 ± 2 % and a high maximum growth rate (μmax = 0.76 d-1). Hydrocarbon degradation increased due to solubilization strategies, mainly emulsification. In particular, a maximum emulsification index (17.7 ± 0.4 %) was reached at 12-day of cultivation increasing the solubility and dispersion of hydrocarbons. Our work contributes to understand the mechanisms of hydrocarbon-degradation in multiphasic systems and reveal the potential use of this native-microbial biomass for bioremediation purposes.
Sergio Valdivia-Rivera, Manuel Alejandro Lizardi-Jiménez, Sergio Alejandro Medina-Moreno, and Victor Sánchez-Vázquez
Elsevier
S. Valdivia-Rivera, A.K. Martínez-Cano, G. Aguirre-García, and M.A. Lizardi-Jiménez
Elsevier BV
Abhishek Dutta, Sergio Valdivia-Rivera, and Manuel Alejandro Lizardi-Jiménez
Walter de Gruyter GmbH
Abstract The aim of this study was to simultaneously evaluate diesel transfer rate (DTR) and oxygen transfer rate (OTR) on the production of an oil-degrading consortium in a three-phase airlift bioreactor (ALB) working at high hydrocarbon phase concentration with the purpose of determine whether the oxygen transfer rate is increased or diminished by an increase in the oil-phase concentration. Increase in hydrocarbon concentration allows an increase in DTR and a consequently higher DTR/OTR ratio thus avoiding hydrocarbon mass transfer limitations. This study demonstrates evidence that at high diesel concentrations, the main carbon fate is the production of biosurfactants.