Publications by authors named "C Portillo"
Objective: To develop a treatment algorithm for patients with penicillin allergy.
Methods: Retrospective study, carried out in adult patients with penicillin allergy, who were in group 3 or 4 of the established classification, and attended the outpatient clinic of the Department of Pulmonology and Allergy of the Central Hospital of the Social Security Institute, between January 2021 and December 2022. Each patient underwent an amoxicillin provocation test, after obtaining informed consent.
Hydrogen has emerged as a promising energy carrier, offering a viable solution to meet our current global energy demands. Solar energy is recognised as a primary source of renewable power, capable of producing hydrogen using solar cells. The pursuit of efficient, durable, and cost-effective photocatalysts is essential for the advancement of solar-driven hydrogen generation.
View Article and Find Full Text PDFHigh Performance of MnO Electrodes for Hydrogen Evolution Using Natural Bischofite Salt from Atacama Desert: A Novel Application for Solar Saline Water Splitting.
Materials (Basel)
October 2024
Solar saline water splitting is a promising approach to sustainable hydrogen production, harnessing abundant solar energy and the availability of brine resources, especially in the Atacama Desert. Bischofite salt (MgCl·6HO) has garnered significant attention due to its wide range of industrial applications. Efficient hydrogen production in arid or hyper arid locations using bischofite solutions is a novel and revolutionary idea.
View Article and Find Full Text PDFArticle Synopsis
- Ag-based electrical contact materials are crucial in low-voltage devices like relays and switches, with Ag-CdO composites historically favored for their excellent properties, though toxicity issues with Cd have led to restrictions.
- A new, eco-friendly alternative using Ag-ZnSnO-based materials is being explored, focusing on the hot mechanochemical oxidation of a Ag-Sn-Zn solid solution made through mechanical alloying.
- The study indicates that this method yields uniform nanoscale ZnSnO precipitates and reveals that the oxidation process follows the Johnson-Mehl-Avrami-Kolmogorov model, with the oxidation mechanism primarily driven by three-dimensional oxide growth limited by oxygen diffusion after nucleation.
Objective: Describe the methodological aspects, sociodemographic, and clinical characteristics of patients hospitalized with acute decompensated heart failure (ADHF) and their short-term outcomes.
Methods: Prospective cohort of patients with ADHF from the emergency service of the cardiovascular center. Descriptive statistics were used to synthesize sociodemographic characteristics, clinical characteristics during hospitalization, and outcomes.