IPSA Scientia, revista científica multidisciplinaria最新文献_第8页

Crosslinked carboxymethyl cellulose-SiO2 hidrogels fabrication: Composition and thermal stability towards biomedical applications 交联羧甲基纤维素- sio2水凝胶的制备:生物医学应用的组成和热稳定性

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2020-10-15 DOI: 10.25214/27114406.935

D. Patiño-Ruiz

{"title":"Crosslinked carboxymethyl cellulose-SiO2 hidrogels fabrication: Composition and thermal stability towards biomedical applications","authors":"D. Patiño-Ruiz","doi":"10.25214/27114406.935","DOIUrl":"https://doi.org/10.25214/27114406.935","url":null,"abstract":"Novel and innovative materials for biomedical and pharmaceutical applications have to consider several factors during their fabrication, such as the material composition and thermal stability, aiming to establish the promising physicochemical properties towards efficient and controlled drug release systems. In this study, carboxymethyl cellulose (CMC) hydrogels are prepared by incorporating silica dioxide (SiO2) nanoparticles previously modified with primary amine (-NH2) functional groups. The carbodiimide chemistry method is performed to promote the crosslinking of the CMC structure through the formation of amide bonds from the activation of carboxyl (C=O) groups and further covalent binding with -NH2 groups. The morphology information displays high dispersed SiO2 nanoparticles with a smooth surface, regular shape, and an average particle size of 104 nm. The material composition and thermal stability are evaluated using the Fourier transform infrared spectroscopy and thermogravimetric analysis to establish a preliminary overview of a functional hydrogel for biomedical and pharmaceutical applications. The formation of amide bonds is confirmed indicating the successful crosslinking of the CMC structure with SiO2-NH2 nanoparticles, which is attributed to the activation of the C=O groups and its strong affinity to the -NH2 groups. This interaction enhanced the thermal stability of the crosslinked CMC-SiO2 hydrogels up to 469°C which was the last decomposition event, outstanding the contribution of major content of SiO2-NH2 nanoparticles. These preliminary results suggest a suitable procedure for the fabrication of crosslinked CMC-SiO2 hydrogels as novel materials with promising physicochemical properties, allowing to proceed with further research works related to the controlled drug release and delivery.","PeriodicalId":387684,"journal":{"name":"IPSA Scientia, revista científica multidisciplinaria","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116810028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nistatina como inhibidor de caveolas: tratamiento preventivo para el contagio por COVID-19 制霉菌素作为小泡抑制剂:COVID-19感染的预防治疗

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2020-06-30 DOI: 10.25214/27114406.942

Jose Palacio-Angulo

引用次数: 1

Gestión ambiental para la innovación y competitividad de las organizaciones ecoturísticas en áreas protegidas 保护区生态旅游组织创新与竞争力的环境管理

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2019-12-31 DOI: 10.25214/27114406.944

Meri Ruiz-Cabezas, Angel-Iván García-Moreno, M. Martínez-Zabaleta

{"title":"Gestión ambiental para la innovación y competitividad de las organizaciones ecoturísticas en áreas protegidas","authors":"Meri Ruiz-Cabezas, Angel-Iván García-Moreno, M. Martínez-Zabaleta","doi":"10.25214/27114406.944","DOIUrl":"https://doi.org/10.25214/27114406.944","url":null,"abstract":"El propósito del presente artículo es analizar la gestión ambiental como estrategia para la innovación y competitividad de las organizaciones prestadoras de servicios ecoturísticos en áreas protegidas, como es el caso del Parque Nacional Natural Tayrona. Se planteó el enfoque cualitativo y técnicas como el análisis documental, la observación cualitativa, la entrevista no estructurada. Los resultados ofrecen una percepción de estas organizaciones sobre la gestión ambiental y el desarrollo de su actividad productiva; las estrategias y herramientas ambientales utilizadas en el sector ecoturístico. La investigación se realiza en áreas de interés ecológico y ambiental aprovechada por organizaciones que desarrollan actividades productivas generadas por el consumo de turistas extranjeros y nacionales; así como las implicaciones en procesos de innovación y competitividad para este tipo de organizaciones que operan en los sectores de Cañaveral y Arrecifes del Parque Nacional Natural Tayrona. Se concluye acerca de la aplicación continua de estrategias ambientales preventivas e integradas a los procesos productivos, los productos y los servicios con el fin de incrementar la eficiencia, competitividad y rentabilidad de las organizaciones.","PeriodicalId":387684,"journal":{"name":"IPSA Scientia, revista científica multidisciplinaria","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116949769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Transferencia de tecnología y conocimiento en el sector exportador de bovinos 牛出口部门的技术和知识转让

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2019-12-31 DOI: 10.25214/27114406.936

Herwy Paternina-Pedroza, José Linares-Morales, Katerine Hernandez-Ayala

引用次数: 7

Nuevo liderazgo organizacional para fortalecer instituciones universitarias débilmente acopladas según Weick 威克认为，新的组织领导加强了松散耦合的大学机构

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2019-12-31 DOI: 10.25214/27114406.938

Waldyr Fong-Silva, Arnulfo Tarón-Dunoyer, Randy Zabaleta-Mesino

引用次数: 7

Salud visual y ocular de escolares atendidos en una clínica universitaria oftalmológica de Cartagena de Indias (Colombia) 在哥伦比亚卡塔赫纳德印第亚斯大学眼科诊所接受治疗的学童的视力和眼睛健康

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2019-12-31 DOI: 10.25214/27114406.941

Carlos Alfonso-Rojas, Karen Murcia-Rojas

引用次数: 1

Política de arbitraje de la revista IPSA SCIENTIA: atributo de calidad de la publicación científica IPSA科学期刊的仲裁政策:科学出版物的质量属性

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2019-12-31 DOI: 10.25214/27114406.953

José Linares-Morales

引用次数: 0

Riesgo biológico generado por el manejo de residuos sólidos en un centro hospitalario 医院固体废物管理产生的生物风险

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2019-12-31 DOI: 10.25214/27114406.940

Alvaro Quintana-Salcedo, Carolin Ramos-De-La-Espriella, Edgar Lugo-Calderón

{"title":"Riesgo biológico generado por el manejo de residuos sólidos en un centro hospitalario","authors":"Alvaro Quintana-Salcedo, Carolin Ramos-De-La-Espriella, Edgar Lugo-Calderón","doi":"10.25214/27114406.940","DOIUrl":"https://doi.org/10.25214/27114406.940","url":null,"abstract":"El objetivo de este artículo es evaluar el riesgo biológico generado por el manejo de residuos sólidos por parte del personal de servicios generales en la E.S.E Hospital Local Cartagena de Indias. Se realizó un estudio descriptivo de enfoque cuantitativo. Se utilizó la matriz de riesgo de la guía técnica colombiana 45 y la encuesta de 14 ítems basada en el Sistema de Vigilancia Epidemiológica para el Riesgo Biológico (modelo para el control del riesgo biológico) de la ARL SURA aplicado al sector hospitalario. La muestra fue de 34 trabajadoras del área de servicios generales, distribuidos en los CAP intraurbanos de la E.S.E. Cartagena. Los resultados muestran que las actividades donde presenta mayor contacto con agentes biológicos son en el lavado de camillas, cambio de bolsas rojas para residuos peligrosos y lavado de guardián (se observó durante el desarrollo de la investigación), siendo esta última inusual. Se concluye que las medidas preventivas y de seguridad que adopta el personal en su puesto de trabajo son eficientes en relación a tener su área limpia y en orden, son conscientes que al realizar sus actividades entran en contacto con agentes biológicos. Por ello se deben realizar capacitaciones de autocuidado, capacitación e inspección del uso y mantenimiento de los elementos de protección personal, así mejorando las acciones preventivas evitando accidentes o enfermedades laborales.","PeriodicalId":387684,"journal":{"name":"IPSA Scientia, revista científica multidisciplinaria","volume":"37 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134464504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Academic performance and its association with class attendance, intrinsic motivation and gender in engineering students 工科学生的学习成绩及其与出勤、内在动机和性别的关系

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2018-12-31 DOI: 10.25214/27114406.927

W. Fong-Silva, F. Colpas-Castillo, D. Franco-Borré

{"title":"Academic performance and its association with class attendance, intrinsic motivation and gender in engineering students","authors":"W. Fong-Silva, F. Colpas-Castillo, D. Franco-Borré","doi":"10.25214/27114406.927","DOIUrl":"https://doi.org/10.25214/27114406.927","url":null,"abstract":"The association between academic performance, attendance to classes, intrinsic motivation and gender in 950 students of the engineering programs of the University of Cartagena between 2014 and 2016 was analyzed. The survey was used to evaluate the academic performance from the dimensions: conceptual, procedural and global. Class attendance and gender was assessed by teacher survey. The intrinsic motivation was evaluated through the CEVEAPEU questionnaire, which was designed and validated by Gargallo et. al (2009). For the relationship analysis, the variables were crossed and the bar diagrams and the 2x2 contingency tables were constructed applying the Chi-Square independence test. The values 0.89 (academic performance) and 0.90 (CEVEAPEU) for the Cronbach's Alpha, allowed to validate the instruments used. The results indicate that there is a significant degree of statistical significance (p <0.05) between academic performance and intrinsic motivation (p = 0.0003) at a confidence level of 95%. This means that the intrinsic motivation associated with enthusiasm, self-awareness, perseverance, mental agility and self-control have a relevant impact on the academic performance of the engineering student at the University of Cartagena. No statistical significance could be verified between the academic performance and the gender of the students. Nor between academic performance and class attendance of engineering students of the University of Cartagena at a 95% level of confidence.","PeriodicalId":387684,"journal":{"name":"IPSA Scientia, revista científica multidisciplinaria","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130874049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Sistema de gestión de seguridad y salud en el trabajo: una revisión desde los planes de emergencia 职业健康和安全管理体系:应急计划的回顾

IPSA Scientia, revista científica multidisciplinaria Pub Date : 2018-12-31 DOI: 10.25214/27114406.920

Jose Jaimes-Morales

引用次数: 11