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Papers by Gonzalo Taborda-Ocampo

Research paper thumbnail of Selection of promissory crops of wild cherry-type tomatoes using physicochemical parameters and antioxidant contents

Bragantia, 2020

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Research paper thumbnail of Evaluation of plant-growth promoting properties of Gluconacetobacter diazotrophicus and Gluconacetobacter sacchari isolated from sugarcane and tomato in West Central region of Colombia

African Journal of Biotechnology, 2017

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Research paper thumbnail of Multi-residue analysis of pesticides in blood plasma using hollow fiber solvent bar microextraction and gas chromatography with a flame ionization detector

Environmental Toxicology and Pharmacology, Feb 1, 2021

The challenges faced on pesticide extraction from biological samples are finding a method that al... more The challenges faced on pesticide extraction from biological samples are finding a method that allows a multi-residue extraction, pre-concentration, clean-up, and isolation of analytes in just one step. In this sense, the hollow fiber - liquid phase microextraction method (HF- LPME) in the "solvent bar" mode was used to optimize and validate a method for pesticide multi-residue analysis in blood plasma at trace levels, through gas chromatography coupled with a flame ionization detector (GC-FID). Hollow fiber solvent bar microextraction HF-SBME was carried out with octanol immobilized into the pores of hydrophobic polypropylene fiber and disposed within a matrix of blood plasma, spiked with a mixture of pesticides (monocrotophos, lindane, aldrin, methyl parathion, endosulfan, dieldrin, DDD, DDT, and endrin). The optimization parameters evaluated were: extraction temperature and time, stirring speed, and salt concentration. A principal component analysis was performed to visualize the analytes' behaviour based on their explained variance, and then, a Box-Behnken analysis was generated to identify the optimum parameters. According to the PCA, all pesticides showed similar responses to the extraction method and the response of dieldrin exhibit the lowest variance. Moreover, the stationary points selected from the Box-Behnken analysis were 25.5 °C for the extraction temperature, 870 rpm for stirring speed, 16 min for extraction time, and 8.3 % w/v of salt concentration. Moreover, the validation results proved that HF-SBME is an alternative technique for pesticide multi-residue extraction in blood plasma. The analytes were able to concentrate, reaching 46 fold enrichment. The solvent type, sample and solvent volume were narrowed down without changing the method's precision or accuracy. The relative standard deviation was under 10 %, and the recovery was between 55 % and 105 % for the different analytes excepting lindane, which had lower recovery (27 %). The detection limits were 0.02 until 0.13 µg mL-1 for most of the pesticides used. Finally, HF-SBME is a good alternative for pesticide multi-residue extraction in complex matrices like plasma.

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Research paper thumbnail of Estudio de la degradación de fenol sobre catalizador de arcilla pilarizada-Study of the degradation of phenol on pillar clay catalyst

Revista Científica del Centro de Investigaciones y Desarrollo Científico de la Universidad Distrital Francisco José de Caldas, Aug 31, 2016

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Research paper thumbnail of Proteínas del moco intestinal humano aislado por irrigación transanal y rectosigmoidoscopia

Revista Colombiana de Química, Sep 1, 2014

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Research paper thumbnail of Proteinas do muco intestinal humano isolado por irrigação transanal e retossigmoidoscopia

Revista Colombiana de Química, Sep 1, 2014

Abstract Human intestinal mucus essentially consists of a network of Mucin2 glycoproteins embedde... more Abstract Human intestinal mucus essentially consists of a network of Mucin2 glycoproteins embedded in many lower molecular weight proteins. This paper contributes to the proteomic study of human intestinal mucus by comparing two sample collection methods (transanal irrigation and brush cytology during proctosigmoidoscopy) and analysis techniques (electrophoresis and digestion in solution). The entire sample collection and treatment process is explained, including protein extraction, digestion and desalination and peptide characterisation using a nanoAcquity UPLC chromatograph coupled to an HDMS spectrometer equipped with a nanoESI source. Collecting mucus via transanal irrigation provided a larger sample volume and protein concentration from a single patient. The proctosigmoidoscopy sample could be analysed via digestion in solution after depleting albumin. The analysis indicates that a simple mucus lysis method can evaluate the electrophoresis and digestion in solution techniques. Studying human intestinal mucus complexes is important because they perform two essential survival functions for humans as the first biochemical and physical defences for the gastrointestinal tract and a habitat for intestinal microbiota, which are primarily hosted in the colon and exceeds the human genetic information and cell number 100- and 10-fold (1).

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Research paper thumbnail of Gone wild: Integration of antioxidative, physicochemical, volatilomic and sensorial profiles ratify rustic relatives of cherry tomato as ideal mating partners

Scientia Horticulturae, 2021

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Research paper thumbnail of Determinación preliminar por cromatografía de gases de los compuestos volátiles presentes en el espacio de cabeza de uchuva (Physalis peruviana L.)

Revista De La Universidad De Caldas, 2003

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Research paper thumbnail of Chemical properties of polyphenols: a reviewfocusedonanti-inflammatory and anti-viral medical application

Biomedicine, Apr 2, 2021

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Research paper thumbnail of Química aplicada para el sector productivo

Universidad EAN eBooks, Aug 11, 2021

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Research paper thumbnail of Effects of post-harvest process on volatile - sensory profile for coffee in Colombia

Coffee Science

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Research paper thumbnail of Reduction in chemical oxygen demand, coliforms, molds and yeast in coffee mucilage through electrocoagulation/Reducción de la demanda química de oxigeno, coliformes, mohos y levaduras en mucilago de café mediante electrocoagulación/Reducao da demanda quimica de oxigenio, coliformes, mofos e leved...

Revista de Investigacion Agraria y Ambiental, 2013

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Research paper thumbnail of Extracción de plaguicidas mediante protocolo QuEChERS

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Research paper thumbnail of Identification of volatile compound markers during the ripening and senescence of lulo (Solanum quitoense Lam.)

Journal of Food Science and Technology, 2017

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Research paper thumbnail of Gluconacetobacter diazotrophicus in tropical tomato (Solanum lycopersicum L.) and sugarcane crops (Saccharum officinarum L.) from the West Central region of Colombia

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Research paper thumbnail of Estudio metabolómico en muestras de sangre de personas intoxicadas con organofosforados

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Research paper thumbnail of Composición volátil de Solanum quitoense mediante microextracción en fase sólida del espacio de cabeza

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Research paper thumbnail of Metabolite Profiling to Monitor Organochlorine Pesticide Exposure in HepG2 Cell Culture

Chromatographia, 2016

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Research paper thumbnail of Remoción de agentes contaminantes por electrocoagulación

Revista De La Universidad De Caldas, 2004

La electroquimica se define clasicamente como la ciencia que trata los cambios quimicos producido... more La electroquimica se define clasicamente como la ciencia que trata los cambios quimicos producidos por la corriente electrica, y de la produccion de electricidad mediante la energia de reacciones quimicas. La electrocoagulacion es una tecnica electroquimica que se perfila como una alternativa de solucion ambiental en las industrias. El presete trabajo consisio en diseñar, construir y poner en funcionamiento un reactor de electrocoagulacion que permita tratar un agua residual de origen industrial en continuo sin necesidad de almacenar estos dsechos y tratarlos conforme se van generando; en ese proceso se remueve materia orgánica y metales pesados. Para la evaluación y optimización del proceso electroquimico en dinàmico se ha trabajado con un sisema modelo de agua residual, del ual se conoce su composiciòn y nos permite valorar la eficiencia de la remociòn en estàtico con un agua residual proveniente de la quebrada Manizales. Se observó que a bajos voltajes los porcentajes de remoción de metales y materia orgánica han aumentado, esta ultima se determina con el analisis de la demanda quimia de oxigeno (DQO) antes y despues del tratamiento, demostrandose que la electrocoagulacion ha sido eficiente tanto en estàtico como en dinámico, aunque en dinámico los porcentajes de remocion han sido menores, los volumenes tratados por unidad de tiempo han sido mayores.

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Research paper thumbnail of Validación de dos métodos analíticos para la determinación espectrofotométrica de ácido sórbico y nitritos en productos cárnicos

Revista De La Universidad De Caldas, 2004

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Research paper thumbnail of Selection of promissory crops of wild cherry-type tomatoes using physicochemical parameters and antioxidant contents

Bragantia, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evaluation of plant-growth promoting properties of Gluconacetobacter diazotrophicus and Gluconacetobacter sacchari isolated from sugarcane and tomato in West Central region of Colombia

African Journal of Biotechnology, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Multi-residue analysis of pesticides in blood plasma using hollow fiber solvent bar microextraction and gas chromatography with a flame ionization detector

Environmental Toxicology and Pharmacology, Feb 1, 2021

The challenges faced on pesticide extraction from biological samples are finding a method that al... more The challenges faced on pesticide extraction from biological samples are finding a method that allows a multi-residue extraction, pre-concentration, clean-up, and isolation of analytes in just one step. In this sense, the hollow fiber - liquid phase microextraction method (HF- LPME) in the "solvent bar" mode was used to optimize and validate a method for pesticide multi-residue analysis in blood plasma at trace levels, through gas chromatography coupled with a flame ionization detector (GC-FID). Hollow fiber solvent bar microextraction HF-SBME was carried out with octanol immobilized into the pores of hydrophobic polypropylene fiber and disposed within a matrix of blood plasma, spiked with a mixture of pesticides (monocrotophos, lindane, aldrin, methyl parathion, endosulfan, dieldrin, DDD, DDT, and endrin). The optimization parameters evaluated were: extraction temperature and time, stirring speed, and salt concentration. A principal component analysis was performed to visualize the analytes' behaviour based on their explained variance, and then, a Box-Behnken analysis was generated to identify the optimum parameters. According to the PCA, all pesticides showed similar responses to the extraction method and the response of dieldrin exhibit the lowest variance. Moreover, the stationary points selected from the Box-Behnken analysis were 25.5 °C for the extraction temperature, 870 rpm for stirring speed, 16 min for extraction time, and 8.3 % w/v of salt concentration. Moreover, the validation results proved that HF-SBME is an alternative technique for pesticide multi-residue extraction in blood plasma. The analytes were able to concentrate, reaching 46 fold enrichment. The solvent type, sample and solvent volume were narrowed down without changing the method's precision or accuracy. The relative standard deviation was under 10 %, and the recovery was between 55 % and 105 % for the different analytes excepting lindane, which had lower recovery (27 %). The detection limits were 0.02 until 0.13 µg mL-1 for most of the pesticides used. Finally, HF-SBME is a good alternative for pesticide multi-residue extraction in complex matrices like plasma.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Estudio de la degradación de fenol sobre catalizador de arcilla pilarizada-Study of the degradation of phenol on pillar clay catalyst

Revista Científica del Centro de Investigaciones y Desarrollo Científico de la Universidad Distrital Francisco José de Caldas, Aug 31, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Proteínas del moco intestinal humano aislado por irrigación transanal y rectosigmoidoscopia

Revista Colombiana de Química, Sep 1, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Proteinas do muco intestinal humano isolado por irrigação transanal e retossigmoidoscopia

Revista Colombiana de Química, Sep 1, 2014

Abstract Human intestinal mucus essentially consists of a network of Mucin2 glycoproteins embedde... more Abstract Human intestinal mucus essentially consists of a network of Mucin2 glycoproteins embedded in many lower molecular weight proteins. This paper contributes to the proteomic study of human intestinal mucus by comparing two sample collection methods (transanal irrigation and brush cytology during proctosigmoidoscopy) and analysis techniques (electrophoresis and digestion in solution). The entire sample collection and treatment process is explained, including protein extraction, digestion and desalination and peptide characterisation using a nanoAcquity UPLC chromatograph coupled to an HDMS spectrometer equipped with a nanoESI source. Collecting mucus via transanal irrigation provided a larger sample volume and protein concentration from a single patient. The proctosigmoidoscopy sample could be analysed via digestion in solution after depleting albumin. The analysis indicates that a simple mucus lysis method can evaluate the electrophoresis and digestion in solution techniques. Studying human intestinal mucus complexes is important because they perform two essential survival functions for humans as the first biochemical and physical defences for the gastrointestinal tract and a habitat for intestinal microbiota, which are primarily hosted in the colon and exceeds the human genetic information and cell number 100- and 10-fold (1).

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Gone wild: Integration of antioxidative, physicochemical, volatilomic and sensorial profiles ratify rustic relatives of cherry tomato as ideal mating partners

Scientia Horticulturae, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Determinación preliminar por cromatografía de gases de los compuestos volátiles presentes en el espacio de cabeza de uchuva (Physalis peruviana L.)

Revista De La Universidad De Caldas, 2003

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Chemical properties of polyphenols: a reviewfocusedonanti-inflammatory and anti-viral medical application

Biomedicine, Apr 2, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Química aplicada para el sector productivo

Universidad EAN eBooks, Aug 11, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effects of post-harvest process on volatile - sensory profile for coffee in Colombia

Coffee Science

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Research paper thumbnail of Reduction in chemical oxygen demand, coliforms, molds and yeast in coffee mucilage through electrocoagulation/Reducción de la demanda química de oxigeno, coliformes, mohos y levaduras en mucilago de café mediante electrocoagulación/Reducao da demanda quimica de oxigenio, coliformes, mofos e leved...

Revista de Investigacion Agraria y Ambiental, 2013

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Research paper thumbnail of Extracción de plaguicidas mediante protocolo QuEChERS

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Identification of volatile compound markers during the ripening and senescence of lulo (Solanum quitoense Lam.)

Journal of Food Science and Technology, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Gluconacetobacter diazotrophicus in tropical tomato (Solanum lycopersicum L.) and sugarcane crops (Saccharum officinarum L.) from the West Central region of Colombia

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Estudio metabolómico en muestras de sangre de personas intoxicadas con organofosforados

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Composición volátil de Solanum quitoense mediante microextracción en fase sólida del espacio de cabeza

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Metabolite Profiling to Monitor Organochlorine Pesticide Exposure in HepG2 Cell Culture

Chromatographia, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Remoción de agentes contaminantes por electrocoagulación

Revista De La Universidad De Caldas, 2004

La electroquimica se define clasicamente como la ciencia que trata los cambios quimicos producido... more La electroquimica se define clasicamente como la ciencia que trata los cambios quimicos producidos por la corriente electrica, y de la produccion de electricidad mediante la energia de reacciones quimicas. La electrocoagulacion es una tecnica electroquimica que se perfila como una alternativa de solucion ambiental en las industrias. El presete trabajo consisio en diseñar, construir y poner en funcionamiento un reactor de electrocoagulacion que permita tratar un agua residual de origen industrial en continuo sin necesidad de almacenar estos dsechos y tratarlos conforme se van generando; en ese proceso se remueve materia orgánica y metales pesados. Para la evaluación y optimización del proceso electroquimico en dinàmico se ha trabajado con un sisema modelo de agua residual, del ual se conoce su composiciòn y nos permite valorar la eficiencia de la remociòn en estàtico con un agua residual proveniente de la quebrada Manizales. Se observó que a bajos voltajes los porcentajes de remoción de metales y materia orgánica han aumentado, esta ultima se determina con el analisis de la demanda quimia de oxigeno (DQO) antes y despues del tratamiento, demostrandose que la electrocoagulacion ha sido eficiente tanto en estàtico como en dinámico, aunque en dinámico los porcentajes de remocion han sido menores, los volumenes tratados por unidad de tiempo han sido mayores.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Validación de dos métodos analíticos para la determinación espectrofotométrica de ácido sórbico y nitritos en productos cárnicos

Revista De La Universidad De Caldas, 2004

Bookmarks Related papers MentionsView impact