Technological Institute of Durango

Col. Bosques de las Lomas, Mexico

Technological Institute of Durango

Col. Bosques de las Lomas, Mexico

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Feuereisen M.M.,University of Bonn | Gamero Barraza M.,Technological Institute of Durango | Zimmermann B.F.,University of Bonn | Zimmermann B.F.,Institute Prof. Dr. Georg Kurz GmbH | And 2 more authors.
Food Chemistry | Year: 2017

Response surface methodology was employed to investigate the effects of pressurized liquid extraction (PLE) parameters on the recovery of phenolic compounds (anthocyanins, biflavonoids) from Brazilian pepper (Schinus terebinthifolius Raddi) fruits. The effects of temperature, static time, and ethanol as well as acid concentration on the polyphenol yield were described well by quadratic models (p < 0.0001). A significant influence of the ethanol concentration (p < 0.0001) and several interactions (p < 0.05) were identified. Identification of the biflavonoid I3′,II8-binaringenin in drupes of S. terebinthifolius was achieved by UHPLC-MS2. Interestingly, at high extraction temperatures (>75 °C), an artifact occurred and was tentatively identified as a diastereomer of I3′,II8-binaringenin. Multivariate optimization led to high yields of phenolic compounds from the exocarp/drupes at 100/75 °C, 10/10 min, 54.5/54.2% ethanol, and 5/0.03% acetic acid. This study demonstrates that PLE is well suited for the extraction of phenolic compounds from S. terebinthifolius and can efficiently be optimized by response surface methodology. © 2016 Elsevier Ltd


Jimenez-Islas D.,Polytechnic University of Pachuca | Paez-Lerma J.,Technological Institute of Durango | Soto-Cruz N.O.,Technological Institute of Durango | Gracida J.,Polytechnic University of Pachuca | Gracida J.,Autonomous University of Queretaro
Food Technology and Biotechnology | Year: 2014

In this work the effects of pH and temperature on ethanol production from red beet juice by the strains Saccharomyces cerevisiae ITD00196 and S. cerevisiae ATCC 9763 are studied. Logistic, Pirt, and Luedeking-Piret equations were used to describe quantitatively the microbial growth, substrate consumption, and ethanol production, respectively. The two S. cerevisiae strains used in this study were able to produce ethanol with high yield and volumetric productivity under acid and thermal stress conditions. The equations used to model the fermentation kinetics fit very well with the experimental data, thus establishing that ethanol production was growth-associated under the evaluated conditions. The yeast S. cerevisiae ITD00196 had the best fermentative capacity and could be considered as an interesting option to develop bioprocesses for ethanol production.


Cisneros-de La Cueva S.,Technological Institute of Durango | Martinez-Prado M.A.,Technological Institute of Durango | Rojas-Contreras J.A.,Technological Institute of Durango | Medrano-Roldan H.,Technological Institute of Durango | Murillo-Martinez M.A.,Technological Institute of Durango
Revista Mexicana de Ingeniera Qumica | Year: 2014

In this research, a diesel-degrading bacterium (strain KJ629314) was isolated from a mining soil contaminated with total petroleum hydrocarbons (TPH) and properly characterized using the polymerase chain reaction (PCR) molecular technique. The 16s rDNA sequence analysis allowed to identify KJ629314 as a strain of Bacillus sp. Experimental phase was conducted to assess the aerobic biodegradation of diesel; to determine the removal efficiency and the corresponding microbial growth; diesel was used as a substrate - electron donor - carbon source; and oxygen (via aeration) as the electron acceptor. Tests were conducted in microcosms with sterile sand with nutrients according to the Nitrogen:Phosphorus ratio of 15:1 at different diesel concentrations (10, 000; 20, 000; 30, 000; 40, 000 and 50, 000 mg/kg soil). Results showed that the strain of Bacillus sp KJ629314 has a high potential in the biodegradation of diesel at the evaluated concentrations, and it was demonstrated that the removal efficiency was greater at low concentrations of diesel obtaining higher values for the microbial growth and diesel biodegradation rate constants. These promising results support the fact that Bacillus sp KJ629314 may be used as a novel biological resource to develop a bioprocess for the bioremediation of diesel-contaminated soil.


Cisneros-de la Cueva S.,Technological Institute of Durango | Martinez-Prado M.A.,Technological Institute of Durango | Lopez-Miranda J.,Technological Institute of Durango | Rojas-Contreras J.A.,Technological Institute of Durango | Medrano-Roldan H.,Technological Institute of Durango
Revista Mexicana de Ingeniera Quimica | Year: 2016

This study was conducted with a fungal strain isolated from a mining soil contaminated with total petroleum hydrocarbons (TPH) and properly identified by polymerase chain reaction (PCR) technique as Aspergillus terreus KP862582. The biodegradation potential of this pure culture was evaluated at laboratory scale; a wide diesel concentration range, from 10,000 to 50,000 mg diesel/kg soil (ppm), was tested using sterile soil microcosm over a 90-day period. Aerobic biodegradation of diesel by Aspergillus terreus KP862582 was significantly greater (p < 0:05) for 10,000, 20,000, and 30,000 ppm, with rate constant values of 0.025, 0.023, and 0.012 1/day, respectively. Cell viability at these concentrations was favored because it showed a significant increase during the first period of biodegradation (0-30 days), from this time onwards efficiency removal and cell viability decreased considerably. This pattern was observed as concentration of diesel increased, resulting in a much lower biodegradation rate for 40,000 ppm (0.005 1/day) and 50,000 ppm (0.002 1/day). Based on the results of this study it is concluded that the strain of Aspergillus terreus KP862582 can be used in the bioremediation of soils contaminated with petroleum hydrocarbons at concentrations of 10,000 and 20,000 ppm, and comply with the MPL established by the Mexican regulation. © 2016, Universidad Autonoma Metropolitana Iztapalapa. All rights reserved.


Nunez-Ramirez D.M.,Technological Institute of Durango | Medina-Torres L.,National Autonomous University of Mexico | Valencia-Lopez J.J.,Metropolitan Autonomous University | Calderas F.,National Autonomous University of Mexico | And 3 more authors.
Journal of Microbiology and Biotechnology | Year: 2012

Fermentation with filamentous fungi in a bioreactor is a complex dynamic process that is affected by flow conditions and the evolution of the rheological properties of the medium. These properties are mainly affected by the biomass concentration and the morphology of the fungus. In this work, the rheological properties of a fermentation with the fungus Beauveria bassiana under different hydrodynamic conditions were studied and the rheological behavior of this broth was simulated through a mixture of carboxymethyl cellulose sodium and cellulose fibers (CMCNa-SF). The bioreactor was a 10 L CSTR tank operated at different stir velocities. Rheological results were similar at 100 and 300 rpm for both systems. However, there was a significant increase in the viscosity accompanied by a change in the consistence index, calculated according to the power law model, for both systems at 800 rpm. The systems exhibited shear-thinning behavior at all stir velocities, which was determined with the power law model. The mixing time was observed to increase as the cellulose content in the system increased and, consequently, the efficiency of mixing diminished. These results are thought to be due to the rheological and morphological similarities of the two fungal systems. These results will help in the optimization of scale-up production of these fungi. © The Korean Society for Microbiology and Biotechnology.


Valencia-Vazquez R.,Technological Institute of Durango | Perez-Lopez M.E.,National Polytechnic Institute of Mexico | Vicencio-De-La-Rosa M.G.,Municipality of Durango | Martinez-Prado M.A.,Technological Institute of Durango | Rubio-Hernandez R.,National Polytechnic Institute of Mexico
Waste Management and Research | Year: 2014

As society evolves its welfare level increases, and as a consequence the amount of municipal solid waste increases, imposing great challenges to municipal authorities. In developed countries, municipalities have established integrated management schemes to handle, treat, and dispose of municipal solid waste in an economical and environmentally sound manner. Municipalities of developing and transition countries are not exempted from the challenges involving municipal solid waste handling, but their task is not easy to accomplish since they face budget deficits, lack of knowledge, and deficiencies in infrastructure and equipment. In the northern territory of Mexico, the municipality of Durango is facing the challenge of increased volumes of waste with a lack of adequate facilities and infrastructure. This article analyses the evolution of the municipal solid waste management of Durango city, which includes actions such as proper facilities construction, equipment acquisition, and the implementation of social programmes. The World Bank, offering courses to municipal managers on landfill operation and waste management, promoted the process of knowledge and technology transfer. Thereafter, municipal authorities attended regional and some international workshops on waste management. In addition they followed suggestions of international contractors and equipment dealers with the intention to improve the situation of the waste management of the city. After a 15-year period, transfer of knowledge and technology resulted in a modern municipal solid waste management system in Durango municipality. The actual system did not reach the standard levels of an integrated waste management system, nevertheless, a functional evaluation shows clear indications that municipality actions have put them on the right pathway. © The Author(s) 2014.


Xiang B.Y.,McGill University | Ngadi M.O.,McGill University | Ochoa-Martinez L.A.,Technological Institute of Durango | Simpson M.V.,McGill University
Food and Bioprocess Technology | Year: 2011

Effects of pulsed electric fields (PEF) on structural modification and surface hydrophobicity were assessed for whey protein isolate (WPI) of protein concentrations (3% and 5%) using fluorescence spectroscopy. The effects of a factorial combination of electric field intensities (12, 16, and 20 kV cm -1) and number of pulses (10, 20, and 30) on the intrinsic tryptophan fluorescence intensity, extrinsic fluorescence intensity, and surface hydrophobicity of WPI were evaluated. PEF treatments of WPI resulted in increases in the intrinsic tryptophan fluorescence intensity and led to 2-4-nm red shifts in emission wavelengths, indicating changes in the polarity of tryptophan residues microenvironment in whey proteins from a less polar to a more polar environment. The extrinsic fluorescence intensity of WPI increased with PEF treatments, but with 2-4-nm blue shifts, indicating partial denaturation of WPI fractions and exposure of more hydrophobic regions under these PEF treatments. Thus, under the conditions studied, PEF treatments of WPI yielded increases in surface hydrophobicity. The study confirmed that PEF treatments resulted in whey protein structure modifications. These results suggested that controlled PEF could be applied to process liquids food including WPI ingredients and modify their structure and function in order to get desired food products. © 2009 Springer Science + Business Media, LLC.


PubMed | Municipality of Durango, National Polytechnic Institute of Mexico and Technological Institute of Durango
Type: Journal Article | Journal: Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA | Year: 2014

As society evolves its welfare level increases, and as a consequence the amount of municipal solid waste increases, imposing great challenges to municipal authorities. In developed countries, municipalities have established integrated management schemes to handle, treat, and dispose of municipal solid waste in an economical and environmentally sound manner. Municipalities of developing and transition countries are not exempted from the challenges involving municipal solid waste handling, but their task is not easy to accomplish since they face budget deficits, lack of knowledge, and deficiencies in infrastructure and equipment. In the northern territory of Mexico, the municipality of Durango is facing the challenge of increased volumes of waste with a lack of adequate facilities and infrastructure. This article analyses the evolution of the municipal solid waste management of Durango city, which includes actions such as proper facilities construction, equipment acquisition, and the implementation of social programmes. The World Bank, offering courses to municipal managers on landfill operation and waste management, promoted the process of knowledge and technology transfer. Thereafter, municipal authorities attended regional and some international workshops on waste management. In addition they followed suggestions of international contractors and equipment dealers with the intention to improve the situation of the waste management of the city. After a 15-year period, transfer of knowledge and technology resulted in a modern municipal solid waste management system in Durango municipality. The actual system did not reach the standard levels of an integrated waste management system, nevertheless, a functional evaluation shows clear indications that municipality actions have put them on the right pathway.


PubMed | Technological Institute of Durango
Type: Evaluation Studies | Journal: Journal of microbiology and biotechnology | Year: 2012

Fermentation with filamentous fungi in a bioreactor is a complex dynamic process that is affected by flow conditions and the evolution of the rheological properties of the medium. These properties are mainly affected by the biomass concentration and the morphology of the fungus. In this work, the rheological properties of a fermentation with the fungus Beauveria bassiana under different hydrodynamic conditions were studied and the rheological behavior of this broth was simulated through a mixture of carboxymethyl cellulose sodium and cellulose fibers (CMCNa-SF). The bioreactor was a 10 L CSTR tank operated at different stir velocities. Rheological results were similar at 100 and 300 rpm for both systems. However, there was a significant increase in the viscosity accompanied by a change in the consistence index, calculated according to the power law model, for both systems at 800 rpm. The systems exhibited shear-thinning behavior at all stir velocities, which was determined with the power law model. The mixing time was observed to increase as the cellulose content in the system increased and, consequently, the efficiency of mixing diminished. These results are thought to be due to the rheological and morphological similarities of the two fungal systems. These results will help in the optimization of scale-up production of these fungi.


PubMed | University of Bonn and Technological Institute of Durango
Type: | Journal: Food chemistry | Year: 2016

Response surface methodology was employed to investigate the effects of pressurized liquid extraction (PLE) parameters on the recovery of phenolic compounds (anthocyanins, biflavonoids) from Brazilian pepper (Schinus terebinthifolius Raddi) fruits. The effects of temperature, static time, and ethanol as well as acid concentration on the polyphenol yield were described well by quadratic models (p<0.0001). A significant influence of the ethanol concentration (p<0.0001) and several interactions (p<0.05) were identified. Identification of the biflavonoid I3,II8-binaringenin in drupes of S. terebinthifolius was achieved by UHPLC-MS(2). Interestingly, at high extraction temperatures (>75C), an artifact occurred and was tentatively identified as a diastereomer of I3,II8-binaringenin. Multivariate optimization led to high yields of phenolic compounds from the exocarp/drupes at 100/75C, 10/10min, 54.5/54.2% ethanol, and 5/0.03% acetic acid. This study demonstrates that PLE is well suited for the extraction of phenolic compounds from S. terebinthifolius and can efficiently be optimized by response surface methodology.

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