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1.
Entramado ; 20(1): 1-ene.-jun. 2024. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1574814

ABSTRACT

RESUMEN El artículo tuvo como objetivo plantear el diseño e implementación de una propuesta para el fortalecimiento de las competencias de desarrollo sostenible y la ciudadanía mundial. Se formula el modelo de gestión curricular que contribuye en la solución de los problemas locales y globales, dentro de los procesos pedagógicos de la Institución Universitaria Pascual Bravo en Medellín- Colombia. A través de las fases de caracterización, planificación, aplicación y evaluación, se propuso una investigación cuantitativa, con alcance descriptivo y de tipo experimental aplicada a 152 profesionales en formación de diferentes pregrados, durante el segundo el semestre académico del año 2021. Los resultados indican que el rango medio de la puntuación mediana del post test es mayor que la del pre test con un p-valor 4.553x10-9 menor del 5%. Esto se ve materializado en las capacidades de los estudiantes para ser flexibles y adaptables, tener conocimientos de la comunicación intercultural, ser autosuficiente en relación con los asuntos globales y generar un buen clima escolan De ahí se concluye que, la intervención pedagógica mejoró los resultados, de forma significativa, sobre los aprendizajes de los participantes del estudio.


ABSTRACT The objective of this article was to propose the design and implementation of a proposal to strengthen sustainable development competencies and global citizenship. The curricular management model is formulated that contributes to the solution of local and global problems, within the pedagogical processes of the Pascual Bravo University Institution in Medellín-Colombia. Through the phases of characterization, planning, application and evaluation, quantitative research was proposed, with a descriptive and experimental scope applied to 152 professionals in training from different undergraduate degrees, during the second academic semester of the year 2021. The results indicate that the average range of the median score of the post test is greater than that of the pretest with a p-value 4.553x01-9 less than 5%. This is materialized in the students' abilities to be flexible and adaptable, have knowledge of intercultural communication, be self-sufficient in relation to global issues, and generate a good school climate. From this it is concluded that the pedagogical intervention significantly improved the learning results of the study participants.


RESUMO O objetivo do artigo foi propor a elaboração e a implementação de uma proposta para fortalecer as competências de desenvolvimento sustentável e a cidadania global. Ele formula o modelo de gestão curricular que contribui para a solução de problemas locais e globais, dentro dos processos pedagógicos da Instituição Universitária Pascual Bravo em Medellín-Colômbia. Por meio das fases de caracterização, planejamento, aplicação e avaliação, foi proposta uma pesquisa quantitativa, com escopo descritivo e tipo experimental, aplicada a 152 profissionais em formação de diferentes cursos de graduação, durante o segundo semestre acadêmico do ano de 2021. Os resultados indicam que a faixa média da pontuação mediana do pós-teste é maior do que a do pré-teste, com um p-valor de 4,553x01-9 inferior a 5%. Isso se materializa nas habilidades dos alunos de serem flexíveis e adaptáveis, de terem conhecimento de comunicação intercultural, de serem autoconfiantes em relação a questões globais e de gerarem um bom clima escolar Portanto, conclui-se que a intervenção pedagógica melhorou significativamente os resultados de aprendizagem dos participantes do estudo.

2.
Molecules ; 25(18)2020 Sep 04.
Article in English | MEDLINE | ID: mdl-32899662

ABSTRACT

The interactions between films of bacterial nanocellulose (BNC) and B complex vitamins were studied using a Quartz Crystal Microbalance with Dissipation monitoring (QCM-D). Thin films of BNC were generated in situ by QCM-D, followed by real-time measurements of the vitamin adsorption. The desorption of vitamins was induced by rinsing the system using phosphate buffers at a pH of 2 and 6.5, emulating gastric conditions. Changes in frequency (which are proportional to changes in adsorbed mass, ∆m) detected by QCM-D were used to determine the amounts of vitamin adsorbed and released from the BNC film. Additionally, changes in dissipation (∆D) were proven to be useful in identifying the effects of the pH in both pristine cellulose films and films with vitamin pre-adsorbed, following its changes during release. The effects of pH on the morphology of the vitamin-BNC surfaces were also monitored by changes in rugosity from images obtained by atomic force microscopy (AFM). Based on this data, we propose a model for the binding phenomena, with the contraction on the relaxation of the cellulose film depending on pH, resulting in an efficient vitamin delivery process.


Subject(s)
Cellulose/chemistry , Gluconacetobacter/chemistry , Nanoparticles/chemistry , Vitamin B Complex/chemistry , Adsorption , Microscopy, Atomic Force , Molecular Conformation , Quartz Crystal Microbalance Techniques , Surface Properties
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