Organic compounds have been produced for industrial applications for decades and they are some of... more Organic compounds have been produced for industrial applications for decades and they are some of the widest spread and most persistent pollutants found in air, water, and sediments. Those so-called persistent organic pollutants (POPs) include to polycyclic aromatic hydrocarbons (PAHs) comprising several of the most prioritized compounds on the US EPAs lists because of its detrimental biological effects, including toxicity, mutagenicity, and carcinogenicity. Its remediation is a priority. A wide diversity of bacteria has been isolated from soils and sediments with the ability to use PAHs as their sole carbon and energy source. The objective of this chapter is to provide an overview of the strategies for bioremediation of PAHs by immobilized biomass and biotransformation that have been applied based on the benefits from the biofilm mode of growth. In the following sections, general concepts about some microbial immobilization processes will be explained. In later sections, different case studies concerning microbial immobilization systems used for hydrocarbon decontamination in waters and soils will be reviewed.Fil: Alessandrello, Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Juárez Tomás, María Silvina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Isaac, Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Transferencia de Villa María. Universidad Nacional de Villa María. Centro de Investigaciones y Transferencia de Villa María; ArgentinaFil: Vullo, Diana Lia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de General Sarmiento; ArgentinaFil: Ferrero, Marcela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentin
The University of Buenos Aires (UBA) develops the UBANEX program, focused on service-learning pro... more The University of Buenos Aires (UBA) develops the UBANEX program, focused on service-learning projects for students involving social, environmental and public health concerns. One of these proposals was a collaborative project between UBA and the National University of General Sarmiento. Based on the hypothesis that students´ voluntary involvement in social concerns improves their attitudes towards themselves and learning, the aim was to focus on the development of social and professional skills by implementing an interdisciplinary work for water quality and supply assessment in low-income homes from a southern district of Buenos Aires Metropolitan Area. Eighteen volunteers -Chemical and Civil Engineering students- were recruited during August-December 2016. Tasks were distributed according to their interests: surveys making, sampling, lab analysis, infrastructure checking, etc. Volunteers were surveyed in social involvement, lab skills, data compilation and analysis, leading to a f...
World journal of microbiology & biotechnology, Jan 17, 2018
Siderophores are low-molecular weight ligands secreted by bacteria as a survival strategy in Fe(I... more Siderophores are low-molecular weight ligands secreted by bacteria as a survival strategy in Fe(III)-lacking environments. They bind not only Fe(III), but Co(II), Zn(II), Mn(II), Ni(II), Ga(III) as a detoxification alternative. The synthesis, purification and characterization of siderophores produced by Pseudomonas veronii 2E were evaluated to be applied in future environmental technologies. Optimal production was obtained in Fe(III)-free M9-succinate at 25 °C, 40 h and pH 6.9. Siderophores were chemically characterized as hydroxamate and catechol mixed-type. Spectroscopic analysis indicated their belonging to the pyoverdine family, behaving as ligand to Cd(II), Zn(II), Cu(II), Ni(II) and Cr(III), which promoted siderophoregenesis during growth. Siderophore-Cd(II) complexation was studied by electrochemical monitored titration revealing one family of moderate-strength binding sites. Mass spectral analysis evidenced the secretion of a variety of molecules (molecular mass ca.1200 u). ...
Organic compounds have been produced for industrial applications for decades and they are some of... more Organic compounds have been produced for industrial applications for decades and they are some of the widest spread and most persistent pollutants found in air, water, and sediments. Those so-called persistent organic pollutants (POPs) include to polycyclic aromatic hydrocarbons (PAHs) comprising several of the most prioritized compounds on the US EPAs lists because of its detrimental biological effects, including toxicity, mutagenicity, and carcinogenicity. Its remediation is a priority. A wide diversity of bacteria has been isolated from soils and sediments with the ability to use PAHs as their sole carbon and energy source. The objective of this chapter is to provide an overview of the strategies for bioremediation of PAHs by immobilized biomass and biotransformation that have been applied based on the benefits from the biofilm mode of growth. In the following sections, general concepts about some microbial immobilization processes will be explained. In later sections, different case studies concerning microbial immobilization systems used for hydrocarbon decontamination in waters and soils will be reviewed.Fil: Alessandrello, Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Juárez Tomás, María Silvina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Isaac, Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Transferencia de Villa María. Universidad Nacional de Villa María. Centro de Investigaciones y Transferencia de Villa María; ArgentinaFil: Vullo, Diana Lia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de General Sarmiento; ArgentinaFil: Ferrero, Marcela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentin
The University of Buenos Aires (UBA) develops the UBANEX program, focused on service-learning pro... more The University of Buenos Aires (UBA) develops the UBANEX program, focused on service-learning projects for students involving social, environmental and public health concerns. One of these proposals was a collaborative project between UBA and the National University of General Sarmiento. Based on the hypothesis that students´ voluntary involvement in social concerns improves their attitudes towards themselves and learning, the aim was to focus on the development of social and professional skills by implementing an interdisciplinary work for water quality and supply assessment in low-income homes from a southern district of Buenos Aires Metropolitan Area. Eighteen volunteers -Chemical and Civil Engineering students- were recruited during August-December 2016. Tasks were distributed according to their interests: surveys making, sampling, lab analysis, infrastructure checking, etc. Volunteers were surveyed in social involvement, lab skills, data compilation and analysis, leading to a f...
World journal of microbiology & biotechnology, Jan 17, 2018
Siderophores are low-molecular weight ligands secreted by bacteria as a survival strategy in Fe(I... more Siderophores are low-molecular weight ligands secreted by bacteria as a survival strategy in Fe(III)-lacking environments. They bind not only Fe(III), but Co(II), Zn(II), Mn(II), Ni(II), Ga(III) as a detoxification alternative. The synthesis, purification and characterization of siderophores produced by Pseudomonas veronii 2E were evaluated to be applied in future environmental technologies. Optimal production was obtained in Fe(III)-free M9-succinate at 25 °C, 40 h and pH 6.9. Siderophores were chemically characterized as hydroxamate and catechol mixed-type. Spectroscopic analysis indicated their belonging to the pyoverdine family, behaving as ligand to Cd(II), Zn(II), Cu(II), Ni(II) and Cr(III), which promoted siderophoregenesis during growth. Siderophore-Cd(II) complexation was studied by electrochemical monitored titration revealing one family of moderate-strength binding sites. Mass spectral analysis evidenced the secretion of a variety of molecules (molecular mass ca.1200 u). ...
Parte del asombro que ha dado lugar a la filosofía ha sido la
existencia de armonías en el univer... more Parte del asombro que ha dado lugar a la filosofía ha sido la existencia de armonías en el universo. Pronto a los griegos les llamó la atención otra cosa más: que las relaciones entre las cosas guardaban proporciones. Al parecer, fue el pitagórico Arquitas de Taranto quien las presentó con el término de analogías. Cuando sus discípulos, ya impacientes, interrogaron a Sócrates en la República de Platón sobre la Idea del Bien, les respondió que era difícil, si no imposible; pero que podía ofrecerles una analogía entre el Bien y el Sol y sus mundos respectivos. Aristóteles utilizó el término como clave de su ética. Su tesis de que el ser, como el bien, se dice de muchas maneras, relacionadas entre sí, fue leída más tarde por los medievales como analogía de atribución. Estudios recientes sobre Leibniz, Kant y Hegel han mostrado que la analogía ha seguido presente en los modernos. Y desde hace unas décadas diversos filósofos y epistemólogos de calibre plantearon su rol fundamental en el conocimiento. Este el libro está dirigido a quien se asombre por el hecho de que la realidad, o nuestro pensamiento y la ciencia, o la música y el arte, presente el enigma de estas proporciones.
Se aborda el rol de la analogía, su estructura y fundamento, en la filosofía, la lógica y diversa... more Se aborda el rol de la analogía, su estructura y fundamento, en la filosofía, la lógica y diversas ciencias. The role of analogy, its structure and foundation, in philosophy, logic and various sciences is addressed.
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Papers by Diana L Vullo
existencia de armonías en el universo. Pronto a los griegos les llamó
la atención otra cosa más: que las relaciones entre las cosas
guardaban proporciones. Al parecer, fue el pitagórico Arquitas de
Taranto quien las presentó con el término de analogías. Cuando sus
discípulos, ya impacientes, interrogaron a Sócrates en la República
de Platón sobre la Idea del Bien, les respondió que era difícil, si no
imposible; pero que podía ofrecerles una analogía entre el Bien y el
Sol y sus mundos respectivos. Aristóteles utilizó el término como
clave de su ética. Su tesis de que el ser, como el bien, se dice de
muchas maneras, relacionadas entre sí, fue leída más tarde por los
medievales como analogía de atribución. Estudios recientes sobre
Leibniz, Kant y Hegel han mostrado que la analogía ha seguido
presente en los modernos. Y desde hace unas décadas diversos
filósofos y epistemólogos de calibre plantearon su rol fundamental
en el conocimiento.
Este el libro está dirigido a quien se asombre por el hecho de que
la realidad, o nuestro pensamiento y la ciencia, o la música y el arte,
presente el enigma de estas proporciones.
The role of analogy, its structure and foundation, in philosophy, logic and various sciences is addressed.