Grupo UTN GISTAQ (Grupo de Investigación sobre temas Ambientales y Químicos)

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Author: search.filters.author.Cuadra, Pablo NicolásStart date: 2024

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    Isolation of microorganisms in effluents from a public health laboratory
    (Sociedad Argentina de Microbiología General, 2024-12-10) Fontana, Gimena Lilián; Hervot, Elsa Ivonne; Farías, Alejandro Rubén; Cuadra, Pablo Nicolás; Guidoli, Marcos Gabriel
    The waste from health facility laboratories consists largely of liquid effluents from automatic analyzers. In practice, these effluents are typically discharged into the sewer system without any prior treatment. Automatic analyzers use disinfectants, detergents, cleaning solutions, and other reagents that may eliminate pathogenic microorganisms. As a result, they generate effluents with a high load of chemical contaminants. If discharged directly into the sewage system without prior treatment, these contaminants can be considered a point source of various residual antimicrobial compounds and other pollutants that may promote the development of antimicrobial resistance. The objective of this study is to isolate environmental microorganisms capable of growing and degrading the chemical contaminants present in effluents generated by the analysis equipment and staining process of the Clinical Analysis Laboratory at Julio C. Perrando Hospital, located in Resistencia, Chaco Province.
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    Analysis of herbicide biodegradation by native bacteria isolated from rice crop soils in Chaco, Argentina
    (Sociedad Argentina de Microbiología General, 2024-12-10) Cuadra, Pablo Nicolás; Farías, Alejandro Rubén; Jorge, Nelly Lidia; Vullo, Diana Lia
    In Argentina, weed management in rice and other crops is often done with herbicides that persist in the soil for a long time. The incorrect and indiscriminate use of these agrochemicals has caused environmental problems, such as soil, groundwater and surface water contamination. Clomazone (CLM), an herbicide from the chemical group of oxazolidinones, is a selective pre- and post-emergence herbicide indicated for application in rice. Imazapyr and imazapic (IMR+IMC) are two herbicides that belong to the group of imidazolinones which interfere weed growth by inhibiting the action of the plant enzyme acetohydroxyacid synthase (AHAS). The objective of this work was to analyze the growth kinetics (GK) of bacterial strains isolated from rice crop soils with CLM and IMR+IMC as the only carbon source, and to analyze their biodegradation over time.