Educacion Quimica最新文献_第2页

Construcción de un potenciostato de bajo costo para estudios de inhibición de corrosión de acero: determinación del potencial de corrosión y mediciones cronoamperométricas 钢抗腐蚀研究用低成本恒电位器的构造:腐蚀电位的测定和计时安培的测量

Educacion Quimica Pub Date : 2017-10-01 DOI: 10.1016/j.eq.2017.05.006

Marco Alfaro , Ignacio Alfaro

引用次数: 3

La cuarta revolución química (1945-1966). De las sustancias a las especies químicas

Educacion Quimica Pub Date : 2017-10-01 DOI: 10.1016/j.eq.2017.07.001

José Antonio Chamizo Guerrero

引用次数: 6

Ligações químicas em livros didáticos de química: uma análise dos elementos dos gêneros de discurso 化学教科书中的化学键:语篇体裁元素分析

Educacion Quimica Pub Date : 2017-10-01 DOI: 10.1016/j.eq.2017.05.001

João Rufino de Freitas Filho , Sírio Pereira da Silva , Cleiton Luiz da Silva Souza , Ladjane Pereira da Silva Rufino de Freitas , Juliano Carlo Rufino de Freitas , Jucleiton José Rufino de Freitas

引用次数: 0

Teorias ácido‐base no século XX e uma análise reflexiva do trabalho científico 20世纪酸碱理论与科学工作的反思性分析

Educacion Quimica Pub Date : 2017-10-01 DOI: 10.1016/j.eq.2017.07.002

Felipe de Moura Souza , Eliana Maria Aricó

引用次数: 0

El laboratorio en Química Orgánica: una propuesta para la promoción de competencias científico-tecnológicas 有机化学实验室:促进科学技术能力的建议

Educacion Quimica Pub Date : 2017-10-01 DOI: 10.1016/j.eq.2017.04.002

Liliana I. Viera, Silvia S. Ramírez, Ana Fleisner

{"title":"El laboratorio en Química Orgánica: una propuesta para la promoción de competencias científico-tecnológicas","authors":"Liliana I. Viera, Silvia S. Ramírez, Ana Fleisner","doi":"10.1016/j.eq.2017.04.002","DOIUrl":"https://doi.org/10.1016/j.eq.2017.04.002","url":null,"abstract":"<div><p>From different spaces it has been stated that the training in competences would seem to be the challenge of High Education. In this teaching model, not only is the understanding of the conceptual content of the disciplines important, but also the acquisition of the complex skills needed to develop competently.</p><p>This paper presents a proposal for the experimental part of a university course of Organic Chemistry based on the approach of teaching by competences. We believe that, through its implementation, competencies such as: organization and decision making, manual skills, investigative procedures and attitudes, conceptual understanding, social attitudes and information management, are promoted. Students must design a work plan whose objective is the isolation and purification of a natural product, using all the theoretical tools studied and the materials and reagents available. Subsequently they must present it in oral and written form, execute it and make a final report (written and oral) in which the results are communicated, analyzed and discussed.</p><p>The experiences showed a greater motivation of the students and an environment of great potentiality to favor the acquisition of scientific-technological competences. These kinds of experiences are transferable to other disciplines that require experimental work.</p></div>","PeriodicalId":39011,"journal":{"name":"Educacion Quimica","volume":"28 4","pages":"Pages 262-268"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.eq.2017.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109183951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Fe de errores de «Van der Waals, más que una ecuación cúbica de estado» “范德华错误信念，而不是三次状态方程”

Educacion Quimica Pub Date : 2017-10-01 DOI: 10.1016/j.eq.2017.10.001

Paola R. Duque Vega, Jesus Gracia-Fadrique

引用次数: 0

Investigación en Química Analítica aplicada a la Nutrición como una herramienta en docencia 分析化学作为教学工具应用于营养的研究

Educacion Quimica Pub Date : 2017-07-01 DOI: 10.1016/j.eq.2017.01.004

Rodrigo José Vargas, Dulce G. Saldaña, Lorena López-Donado

引用次数: 0

Proposta de aula experimental utilizando a perlita expandida modificada com ortofenantrolina na remoção do negro de eriocromo T em resíduos de titulometria de complexação 用邻菲罗啉改性的膨胀珍珠岩去除络合滴定法残基中的红黑T的实验课程建议

Educacion Quimica Pub Date : 2017-07-01 DOI: 10.1016/j.eq.2017.01.001

Janiele Mayara Ferreira de Almeida, Sheila Pricila Marques Cabral de Souza, Isabel do Nascimento Silva, Nedja Suely Fernandes

{"title":"Proposta de aula experimental utilizando a perlita expandida modificada com ortofenantrolina na remoção do negro de eriocromo T em resíduos de titulometria de complexação","authors":"Janiele Mayara Ferreira de Almeida, Sheila Pricila Marques Cabral de Souza, Isabel do Nascimento Silva, Nedja Suely Fernandes","doi":"10.1016/j.eq.2017.01.001","DOIUrl":"https://doi.org/10.1016/j.eq.2017.01.001","url":null,"abstract":"<div><p>In this paper, an approach to the removal of the eriochrome black T in an actual effluent (generated from the test to determine the water hardness by complexometric titration) using perlite modified with orthophenanthroline by the adsorption technique is proposed. A preliminary assessment of the removal of eriochrome black T in a synthetic effluent (aqueous solution of eriochrome black T) was executed for subsequent application of the optimized conditions in actual residual water (titration residue of complexation). The removal of dye at pH 10, the natural pH of the actual effluent, was not significant reaching 8.12% of color removal, on the other hand, the removal of dye at pH 3 achieved the maximum color removal (100%), indicating that the eriochrome black T interacts more effectively with the adsorbent at acidic pH (pH 5 or 3), and more efficiently at pH 3. Therefore, by the results obtained under conditions established in this present study were concluded that expanded perlite (an amorphous and naturally acidic aluminosilicate) modified with orthophenanthroline (a Bronsted base) is an easy to prepare, cheap and effective material for removal of acid dyes (eriochrome black T) applied to residues containing eriochrome T black generated during practical chemistry classes.</p></div>","PeriodicalId":39011,"journal":{"name":"Educacion Quimica","volume":"28 3","pages":"Pages 131-139"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.eq.2017.01.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91683995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

¿Cómo podemos averiguar si Limpics es un fraude? Aprendiendo a diseñar investigaciones en educación secundaria 我们如何知道Limpics是否是一个骗局?学习设计中等教育研究

Educacion Quimica Pub Date : 2017-07-01 DOI: 10.1016/j.eq.2017.01.002

Beatriz Crujeiras , Fermín Cambeiro

引用次数: 1

Aprendizaje basado en problemas como complemento de la enseñanza tradicional en Fisicoquímica 以问题为基础的学习是对传统物理化学教学的补充

Educacion Quimica Pub Date : 2017-07-01 DOI: 10.1016/j.eq.2017.03.001

Carina Lorena Fernández, María Inés Aguado

{"title":"Aprendizaje basado en problemas como complemento de la enseñanza tradicional en Fisicoquímica","authors":"Carina Lorena Fernández, María Inés Aguado","doi":"10.1016/j.eq.2017.03.001","DOIUrl":"https://doi.org/10.1016/j.eq.2017.03.001","url":null,"abstract":"<div><p>Physicochemistry's contents are considered as of little application in the future, and so a lot of the students direct their efforts towards a superficial learning. Problem-based learning (PBL) is a methodological strategy that seeks to stimulate the need of knowing in students and it is used as a mean to acquire knowledge and apply them to solve a real or fictitious problem. The purpose of this article is to describe the results of an experience in which PBL was used as a complement of traditional teaching in three student cohorts. Two instances of qualitative evaluation and three of quantitative evaluation were done. Results showed a high qualitative evaluation, emphasizing the studentś satisfaction with the close integration of theoretical and practical contents. At the same time, the group quantitative achievements were very encouraging, even though the individual performance of the group members did not reflect the same. In conclusion, the adoption of PBL as a complement to traditional teaching is an educational investment that is fruitful at least in the short and medium term, despite the initial resistance of the students and the time and effort demanded to teachers and students.</p></div>","PeriodicalId":39011,"journal":{"name":"Educacion Quimica","volume":"28 3","pages":"Pages 154-162"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.eq.2017.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91683997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8