Browsing by Author "Herrera, Jose"

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    Latin American Surgical Outcomes Study in Paediatrics (LASOS-Peds): study protocol and statistical analysis plan for a multicentre international observational cohort study
    (BMJ PUBLISHING GROUP, 2024) Quintao, Vinicius Caldeira; de Sousa, Gabriel Soares; Torborg, Alexandra; Vieira, Alexandra; Consonni, Francesco; Rodrigues, Samuel; Proenca, Julia; Carlos, Ricardo Vieira; Clemente, Marcella; Alonso, Nivaldo; Neville, Mariana; Leite, Fernanda; Tonello, Cristiano; Evans, Faye; Garcia-Marcinkiewicz, Annery; Guris, Rodrigo; Herrera, Jose; Andersen, Ana; Schaigorodsky, Lorena; Biondini, Nanci; Cajas, Ninon; Cruzat, Francisco; Cortínez, Luis Ignacio; Giraldo, Marisol; Valle, Alioth; Pozo, Cristian; Betancourt, Ana; Echeto, Maria Alejandra; Dominguez, Alma; Sarmiento, Lina; Gonzalez, Kenya; Abrego, Gesely; Leguizamon, Lorena; Paula, Leila; Lauber, Clarisa; Lopez, Gabriela; Biccard, Bruce M.; Carmona, Maria Jose; Hajjar, Ludhmila Abrahao
    Introduction Surgery is a cost-effective public health intervention. Access to safe surgery is a basic human right. However, there are still significant disparities in the access to and safety of surgical and anaesthesia care between low-income and middle-income countries and high-income countries. The Latin American Surgical Outcomes Study in Paediatrics (LASOS-Peds) is an international, observational, 14-day cohort study to investigate the incidence of 30-day in-hospital complications following elective or emergency paediatric surgery in Latin American countries.Methods and analysis LASOS-Peds is a prospective, international, multicentre observational study of paediatric patients undergoing both elective and non-elective surgeries and procedures, inpatient and outpatient, including those performed outside the operating room. The primary outcome is the incidence of in-hospital postoperative complications up to 30 days after surgery. Secondary outcomes include intraoperative complications and the need for intensive care unit admission.Ethics and dissemination This study received approval from the Institutional Review Board of the coordinating centre (Hospital das Cl & iacute;nicas, Faculdade de Medicina, Universidade de S & atilde;o Paulo) as well as from all the participating centres. The study results are expected to be published in peer-reviewed journals and disseminated at international conferences.Trial registration number NCT05934682.
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    Learning to Leverage Microblog Information for QA Retrieval
    (2018) Herrera, Jose; Poblete, Barbara; Parra Santander, Denis Alejandro
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    Use of copper sheet in a solar photo-Fenton-like process applied in the treatment of landfill leachate
    (2023) Poblete, Rodrigo; Rodriguez, Carlos Anibal; Carrasco, Claudia; Herrera, Jose; Salazar-Gonzalez, Ricardo
    It is known that copper can be used as catalyst in photo-Fenton-like process; however, there is a lack of information related with its use in the treatment of landfill leachate (LL) in solar photo-Fenton-like processes. Here, we studied the effect of the mass of a copper sheet, the pH of the solution, and the concentration of LL in the removal of the organic matter present in this water. Before the reaction with landfill leachate, the copper sheet used in the reaction was constituted by Cu+ and Cu2O, respectively. The results showed that in a volume of 0.5 L of a pretreated LL, the higher removal of organic matter resulted using a mass of 2.7 g of the copper sheet, a pH of solution of 5, and a concentration of LL of a 10%, obtaining a final value of C/C-0 of chemical oxygen demand (COD) of 0.34, 0.54, 0.66, and 0.84 for concentrations of 25%, 50%, 75%, and 100%, respectively, and 0.0041, 0.0042, 0.0043, and 0.016 for concentration of 25%, 50%, 75%, and 100%, respectively, of C/C-0 of humic acids. The photolysis on LL at its natural pH using solar UV removes very little humic acid and COD, going from 9.4 to 8.5 and 7.7 Abs(254) for photolysis and UV + H2O2, obtaining 8.6 and 17.6% of removal, respectively, and 2.01 and 13.04% removal of COD, respectively. Copper sheet applied under Fenton-like conditions results in 65.9% removal and an increase of 0.2% for humic acid and COD, respectively. Removal using only H2O2 for Abs(254) and COD was 11.95 and 4.3%, respectively. Raw LL produced a 29.1% inhibition of the biological activated sludge rate after the adjustment to pH 7 and the final process of inhibition was 0.23%.