Conference Agenda

The objective of this study was to evaluate the effect of different concentrations of starch extracted from purple sweet potato peel (2 %, 2.5 %, and 3 %) on the mechanical and physical properties of biodegradable films produced by the casting method. Maximum tensile strength, elongation at break, thickness, and moisture content were analyzed. The results showed that starch concentration significantly influenced the mechanical behavior of the films, with both tensile strength and elongation increasing as starch content increased. The 3 % treatment exhibited the highest tensile strength (0.33 kg) and elongation (9.23 %), while the 2% formulation showed the highest moisture content. Statistical analysis (ANOVA and Tukey) revealed significant differences among treatments for tensile strength, elongation, and moisture (p < 0.05), identifying the 3 % treatment as the most suitable formulation for achieving films with superior mechanical performance. These findings indicate that starch obtained from purple sweet potato peel is a promising and sustainable raw material for the development of biodegradable films. Further research should focus on optimizing formulation parameters and processing conditions to enhance the overall performance of the material.

In Peru, mining is a fundamental activity for economic development; however, its practice generates significant environmental impacts, especially on soils affected by heavy metals such as copper and lead. Therefore, sustainable remediation strategies are needed to contribute to their recovery. This study evaluated the effectiveness of compost enriched with and without effective microorganisms (EM) as a biotechnological alternative for the recovery of soils degraded by mining waste. A quantitative experimental methodology was used, lasting 60 days. Four treatments were applied in pots containing 1 kg of soil: T1 and T2 used conventional compost at 25% and 50%, respectively; while T3 and T4 consisted of 25% and 50% compost enriched with EM, with the addition of 50 ml and 100 ml of EM, maintaining the same amendment proportions. The results showed removal efficiencies of 15.2%, 41.7%, 97.7%, and 98.8% for copper, and 18.1%, 42.2%, 98.7%, and 98.8% for lead, in the respective treatments. In conclusion, the compost enriched with 50% EM (T4) was the most effective treatment, demonstrating its potential to reduce metal concentrations and improve the soil's physicochemical properties. However, very similar values were obtained in T3, indicating that 50 ml is sufficient. Furthermore, increasing the dosage and application time optimized the efficiency of the remediation process

The development of germicidal infrastructure and antimicrobial materials can play a significant role in containing pathogenic microorganisms in public health, food safety, public transportation, and across all sectors. This study aimed to test the antimicrobial properties of candidate metals such as copper and three of its alloys in solid and powder (scraping) form using pathogenic microorganisms such as Staphylococcus aureus and E. coli, simulating environmental conditions in which these microorganisms could survive. The results surprisingly showed significant bactericidal and bacteriostatic power in all the tested alloys except stainless steel, presenting a promising scenario for the development of innovations, materials, products, and infrastructure with antimicrobial and germicidal properties for all sectors.

The lack of accessible information and digital tools aimed at the clinical and educational monitoring of canine health is a challenge in Honduras, contributing to abandonment and to the late detection of diseases associated with zoonosis. This situation increases public health risks and limits responsible pet ownership. In this context, the objective of this project was to develop a mobile application prototype oriented toward the prevention and monitoring of canine health, through the implementation of clinical criteria, educational components, and data security mechanisms. The development of the prototype was carried out through the selection of a digital tool using the ELECTRE methodology, followed by the design of the functional architecture and the user interface under usability and user experience principles. Additionally, relevant clinical and educational indicators were defined based on a literature review, surveys conducted with potential users, and interviews with veterinary medicine specialists, ensuring that the proposed system addressed real needs and aligned with professional practices. Preliminary validation was performed through the application of the System Usability Scale and the Technology Acceptance Model to users and specialists. The results demonstrated that the prototype adequately integrated functions oriented toward health information recording, preventive reminders, access to educational content, and a directory of veterinary services, while complying with basic data security and ease-of-use requirements. It is concluded that the prototype is viable as a supportive tool for education, prevention, and monitoring of canine health, with potential to reduce abandonment, mitigate zoonosis-related risks, and promote responsible pet care through digital tools.

To determine the optimal solvent-to-feed mass ratio in a liquid–liquid extraction (LLE) process, four systems comprising the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF₄) and an impure diesel model represented by dodecane were constructed. The impurities considered were pyridine, thiophene, and toluene. The systems were simulated using coarse-grained molecular dynamics (CGMD) with the MARTINI 3 force field. The amount of IL was kept constant, while the amount of impure diesel was varied to obtain solvent-to-feed mass ratios of 1:0.5, 1:1, 1:2, and 1:3. In all four systems, the impure diesel composition was identical, consisting of 70% dodecane and 10% of each impurity. The optimal ratio was determined by extraction efficiency, distribution ratio, and selectivity. The 1:2 system exhibited the highest extraction efficiency for all three impurities, reaching 49% for toluene, 77% for thiophene, and 84% for pyridine. The distribution ratio followed the same pattern as the extraction efficiency, with the highest values also observed for the 1:2 system for all three impurities. Pyridine exhibited the highest distribution ratio, reaching 9.0, followed by thiophene (5.4) and toluene (1.9). Selectivity increased with increasing impure diesel mass, indicating a stronger preference of the IL for the impurities. The highest selectivity values were obtained for pyridine, indicating its preferential extraction over the other system components. The RDF analysis for the optimized system followed the same trend with the pyridine closer to the [BMIM] confirming a strong affinity.

In automotive body and paint shops, one of the main causes of exposure to chemical aerosols is poor ventilation and the lack of extraction systems, affecting workers' health. Therefore, this study will evaluate the concentration of chemical aerosols to which workers in an automotive workshop in the city of Arequipa are exposed, in order to design a localized extraction system that improves ventilation and occupational health and safety conditions. To this end, three environmental measurements were taken during the work shift, lasting one hour for each stage of the production process (normal conditions, paint mixing, and spray application), using a personal sampling pump and the NIOSH 0600 gravimetric method. Concentrations of 0.143 mg/m³, 2.36 mg/m³, and 6.19 mg/m³ were obtained, respectively, the latter exceeding the maximum permissible limit of 3 mg/m³ established in the D.S. No. 015-2005-SA for respirable particles, which demonstrates significant overexposure during the spray gun application stage. Finally, given that the maximum permissible limits for chemical aerosols to which workers are exposed are exceeded, the implementation of a 2 HP centrifugal fan, a Ø300 mm flexible duct, and a three-stage filtration system is proposed. This system captures and expels contaminated air to the outside through a metal chimney, aiming to significantly reduce the concentration of contaminants.