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Revisión sistemática sobre la producción de biodiésel a partir de microorganismos oleaginosos en Latinoamérica con énfasis en Colombia
(Universidad Santiago de Cali, 2023) Quiñones Aguirre, Lina Natalia; Álzate Calderón, Paola; Mellizo, Jhon Eric
Currently, the production of biodiesel is considered the best alternative to reduce among other things the environmental impacts caused in the production and use of fossil fuels, the use of oily microorganisms as a raw material to produce biodiesel triggers great interest because it has great advantages compared to other types of raw materials, among these the reduction of production costs. That is why we proposed the elaboration of a systematic review of the existing literature during the period 2008-2022 on studies related to the production of biodiesel from oilseed microorganisms in the most representative countries of Latin America (Brazil, Argentina, Colombia, Peru, Ecuador, Mexico, and Chile). For this, a search log was prepared in which databases of gray literature type, specialized and multidisciplinary are included. The data were analyzed according to some of the parameters recommended by the PRISMA Declaration. In total, 70 publications were included, finding that the type of microorganism most used in the different studies were Microalgae (53) and that the country with the most reports for the different microorganisms was Brazil (31), as well as relevant information such as lipid productivity, biomass and fatty acids according to the information provided in the different studies for each case It is expected that this review will strengthen the studies for the production of biodiesel using oilseed microorganisms as raw material in Colombia, providing consolidated and relevant information so that the scientific community can develop related studies and promote the use of microorganisms at an industrial and biotechnological level
Degradación del polietileno de baja densidad mediada por hongos filamentosos: Una revisión sistemática
(Universidad Santiago de Cali, 2023) Banguera Ortiz , Adriana Sofia; Rangel Hoyos, Patricia; Rojas Barreto, Julián Alonso; Caicedo Bejarano, Luz Dary
Low-density polyethylene (LDPE), is used in the food, clothing, transportation, construction, and medical industries. It is a high-consumption material and due to its physicochemical nature is extremely durable, recalcitrant, relatively unbreakable, and could be present for more than 50 years in the environment. Their accumulation generates serious pollution damage affecting natural resources, threatening fauna, wildlife, and even public health. In most landfills plastic waste represents the largest fraction, reaching up to 25% by weight in some sites. Degradation of LDPE can occur by chemical, physical, and biological methods, which can be affected by temperature, UV light, and enzymatic actions of both bacterial and fungal microorganisms. In biodegradation studies, fungi are considered potential candidates for LDPE degradation, due to their ability to adhere to the polymer surface and the production of intra- and extracellular enzymes. This review reports fungi isolated from LDPE-rich landfills with LDPE biodegradative capacity. Some fungi reported were of the genus Aspergillus, Penicillium, Rhizopus, among others. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) techniques are used to measure biodegradation and although other reviews have been analyzed, there is little information on fungi extracted from landfills used for LDPE biodegradation
Evaluación de la actividad antimicrobiana de colistina encapsulada en nanopartículas de quitosano frente a bacterias extremadamente drogo resistentes
(Universidad Santiago de Cali, 2023) Barrera Vélez, Alejandro-Programa Química Farmacéutica ; Pacheco Sierra, Fabian Alexander-Programa Microbiología; Oñate Garzón, José Fernando; Polo Cerón, Dorian
Antibiotics are a crucial tool in the fight against bacterial infections, both in humans and animals. However, inappropriate use of these drugs has led to bacteria adapting and developing resistance to them, as is the case of P. aeruginosa bacteria, which has multiple ways of resisting even last-line antibiotics, such as colistin. This antimicrobial polypeptide is effective against gram-negative bacteria, but it has nephrotoxic side effects and its efficacy is decreasing against P. aeruginosa. To address this global problem, new techniques have been developed to improve the antimicrobial activity of existing antibiotics. One such technique is the encapsulation of colistin in a natural polymer called chitosan, which improves drug dispersion and increases its activity against bacteria. Recent studies evaluated the performance of chitosan nanoparticles loaded with antibiotics to treat bacterial resistance. The results indicated a significant decrease in bacterial antimicrobial activity, suggesting that the chitosan encapsulation technique could be a promising alternative for the treatment of antibiotic-resistant bacterial infections. To determine this, the performance of chitosan nanoparticles loaded with colistin was synthesized, characterized and evaluated against 2 strains of P. aeruginosa, one sensitive and the other extremely resistant to colistin; obtaining as a result a decrease in the microbial activity (going from growth at colistin concentration of 16 µ/mL to 4 µ/mL) of extremely resistant P. aeruginosa
Generación automática de reglas procedurales a partir de objetos 3D aplicado al modelado de entornos urbanos (GENOME)
(Universidad Santiago de Cali, 2025) Calvache Clavijo, Juan Felipe; Alomia Peñafiel, Gustavo Adolfo (Director)
3D modeling is a virtualization technique applied in different fields such as architecture, design, video games and digital environments, the characteristics of the different techniques are given by their complexity or time consumption, therefore, the project aims to study the technique known as procedural modeling, for the creation of a tool and a workflow, that allows to reduce the time in the creation of structures in urban environments. The workflow created in the project comprises three phases, the first aims to capture information, data from geographic information systems (GIS) and photographic image analysis are integrated, the second takes the data from phase one where it is processed by software, generating procedural rules that describe how to model the captured building. The third phase consists of implementing the rules generated in Phase 2 in the CityEngine software. This tool uses procedural rules to extrude 2D axioms into complete 3D models. This project was developed in order to create a tool that would allow the construction of these structures so that the process of building digital environments could be streamlined.
Software como herramienta complementaria durante el proceso de aprendizaje en el área de matemáticas para estudiantes de grado quinto de primaria
(Universidad Santiago de Cali, 2021) Lozano Amaya, Daniela; Ochoa Асosta, Diego Fernando; Tavera, Carlos Andres (Director)