Chemistry Teacher International最新文献_第2页

A lab experiment on metals separation and recovery from waste ink-jet cartridges as a non-formal appealing learning activity for students of secondary schools 从废弃喷墨墨盒中分离和回收金属的实验室实验，作为面向中学生的非正规吸引力学习活动

Chemistry Teacher International Pub Date : 2024-05-13 DOI: 10.1515/cti-2023-0063

A. Rossi, Angela Serpe

{"title":"A lab experiment on metals separation and recovery from waste ink-jet cartridges as a non-formal appealing learning activity for students of secondary schools","authors":"A. Rossi, Angela Serpe","doi":"10.1515/cti-2023-0063","DOIUrl":"https://doi.org/10.1515/cti-2023-0063","url":null,"abstract":"\u0000 Since 2004, the Italian Ministry of Education, University and Research (MIUR), the Conference of Science and Technology Headmasters, and Confindustria, have been promoting the National Plan for Scientific Degrees (PLS) aimed at supporting students in acquiring scientific skills better responding to contemporary society challenges and increasing vocations in basic sciences. This paper describes a successful experience of the University of Cagliari together with selected local secondary schools, in which the hot topic of technological waste valorization was selected to create an orientation laboratory for students towards chemistry disciplines. Specifically, students and teachers were guided into the challenging world of e-waste production and treatment through the practical activity of noble metals recovery from real waste ink-jet cartridges. A specific emphasis was placed on fundamental chemical aspects – separation and recovery of metals driven by redox processes favored by a complexing agent – as well as on the chance to play on coordination chemistry to promote a green chemistry approach. The close collaboration between school and university teachers in planning and implementing laboratory activities is the element that characterizes PLS actions and promotes the development and strengthening of relations between secondary school and university courses in science, technology, engineering, and mathematics (STEM).","PeriodicalId":515025,"journal":{"name":"Chemistry Teacher International","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140984509","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

Analysis of undergraduate chemistry students’ responses to substitution reaction mechanisms: a road to mastery 分析本科化学学生对取代反应机理的反应：通向掌握的道路

Chemistry Teacher International Pub Date : 2024-05-08 DOI: 10.1515/cti-2023-0075

Esther Nartey, Ernest Koranteng, Emmanuel Kyame Oppong, Ruby Hanson

{"title":"Analysis of undergraduate chemistry students’ responses to substitution reaction mechanisms: a road to mastery","authors":"Esther Nartey, Ernest Koranteng, Emmanuel Kyame Oppong, Ruby Hanson","doi":"10.1515/cti-2023-0075","DOIUrl":"https://doi.org/10.1515/cti-2023-0075","url":null,"abstract":"\u0000 This study analyzed third-year undergraduate Chemistry major students’ drawings and written explanations of substitution reactions. Seventy (70) students were purposively selected for this study. The main data collection instrument was a diagnostic test and students’ responses were analyzed using deductive coding. The study aimed to unearth students’ conceptual understanding and difficulties on substitution reactions to provide significant insights into improving teaching strategies and learning outcomes. The findings revealed that: 1. Students were more familiar with SN2 reaction mechanisms and could answer questions on SN2 reaction mechanisms better than SN1 reaction mechanisms; 2. Students’ use of ‘chemical vocabulary’ did not translate into an understanding of electron movement and causal mechanistic explanation; 3. About 97 % of the students who gave a correct/partially correct description provided a description of what was happening in the reaction without any further explanation of why the reaction occurred; 4. Students had a slightly better understanding of drawing the correct mechanisms than providing accurate explanations. This study recommends that, in teaching organic reaction mechanisms, instructors should emphasize on electron-pushing formalisms and explain how and why reactions occur to encourage mechanistic thinking in students. Also, students should be given ample practice in organic reaction mechanisms to improve mastery.","PeriodicalId":515025,"journal":{"name":"Chemistry Teacher International","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141001442","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

Students’ perceptions towards the use of computer simulations in teaching and learning of chemistry in lower secondary schools 学生对初中化学教学中使用计算机模拟的看法

Chemistry Teacher International Pub Date : 2024-04-15 DOI: 10.1515/cti-2023-0064

Jane Batamuliza, Gonzague Habinshuti, Jean Baptiste Nkurunziza

{"title":"Students’ perceptions towards the use of computer simulations in teaching and learning of chemistry in lower secondary schools","authors":"Jane Batamuliza, Gonzague Habinshuti, Jean Baptiste Nkurunziza","doi":"10.1515/cti-2023-0064","DOIUrl":"https://doi.org/10.1515/cti-2023-0064","url":null,"abstract":"\u0000 The study aims to explore how students perceive the use of interactive computer simulations (ICS). The mixed-method approach under a converging design was employed to collect quantitative and qualitative data. A sample of 160 participants were purposively selected. The questionnaire consisted of four sections, including Behavioral Intention to Use, Attitude Toward Usage, Usefulness, and Perceived Ease of Use. The collected data was analyzed in MS Excel. 83 % of participants believed that their learning experience has improved and become easier. Moreover, a significant number of students 79 % expressed high perceptions towards the ease-of-use ICS in the teaching and learning process, and 77 % demonstrated a strong positive attitude towards the usage. Additionally, 76 % had a highly positive perception of their behavioral intention to use ICS in their chemistry learning. However, 39 % of students expressed low perceptions of ease of use of ICSs due to a lack of basic computer skills. In general, the findings show positive significance in students’ perceptions toward the use of ICSs in teaching and learning chemistry. The study recommends that ICSs should be used to supplement chemistry education.","PeriodicalId":515025,"journal":{"name":"Chemistry Teacher International","volume":"36 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140702081","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

Fractionating microplastics by density gradient centrifugation: a novel approach using LuerLock syringes in a low-cost density gradient maker 通过密度梯度离心分离微塑料：在低成本密度梯度离心机中使用 LuerLock 注射器的新方法

Chemistry Teacher International Pub Date : 2024-04-11 DOI: 10.1515/cti-2023-0079

Alina Majcen, J. Gohla, Anna S. Steinhoff, Lena Meißner, Sebastian Tassoti, Philipp Spitzer

{"title":"Fractionating microplastics by density gradient centrifugation: a novel approach using LuerLock syringes in a low-cost density gradient maker","authors":"Alina Majcen, J. Gohla, Anna S. Steinhoff, Lena Meißner, Sebastian Tassoti, Philipp Spitzer","doi":"10.1515/cti-2023-0079","DOIUrl":"https://doi.org/10.1515/cti-2023-0079","url":null,"abstract":"\u0000 Microplastics are now ubiquitous in the environment and are even considered “technofossils” of the Anthropocene. Given their omnipresence and potential impact, identifying and analyzing these particles becomes increasingly crucial. Novel approaches suggest density gradient centrifugation for simultaneous extraction and fractionation of microplastic particles based on their plastic-specific densities. In this article we describe a cheap and harmless experimental setting to fractionate microplastic particles by density gradient centrifugation. An innovative low-cost Do-It-Yourself (DIY) gradient maker using Luer-Lock syringes is presented. With this gradient maker it is possible to produce density gradients with water and sucrose solutions, covering a density range of 1.00–1.32 g/cm3, as well as with water and saturated potassium carbonate solutions, covering a density range of 1.06–1.53 g/cm3. The separation performance was tested with the most broadly used plastics polyamide, polyurethane, polycarbonate, polyethylene terephthalate and polyvinylchloride. Both density gradients show centrifugation stability and clear banding patterns after centrifugation. Due to its cheap and easy-to-build-easy-to-use nature, this experimental setting for microplastic fractionation by density gradient centrifugation offers an approach for schools not only to address the microplastic problems, but also to integrate new methods of microplastic analysis in upper secondary school laboratories.","PeriodicalId":515025,"journal":{"name":"Chemistry Teacher International","volume":"32 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140714546","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

EDITORIAL for Volume 6_1 第 6_1 卷编辑

Chemistry Teacher International Pub Date : 2024-03-28 DOI: 10.1515/cti-2024-2002

Mustafa Sözbilir

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List of reviewers contributing to volume 5, 2023 为 2023 年第 5 卷撰稿的审稿人名单

Chemistry Teacher International Pub Date : 2024-03-12 DOI: 10.1515/cti-2024-2001

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Consequences of the incorrect disposal of electronic waste when growing flower seedlings 种植花苗时错误处理电子垃圾的后果

Chemistry Teacher International Pub Date : 2024-02-29 DOI: 10.1515/cti-2023-0061

Karen Ouverney dos Santos, Cauã Paes de Almeida Martins, Maurício Luzetti de Oliveira Leite, Michel Alves Moura Andrade, Sophia da Cruz Augusto

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Design of Jacob’s ladder-based teaching aids for illustrating the dualities of benzene derivatives 设计基于雅各布天梯的教具，用于说明苯衍生物的二元性

Chemistry Teacher International Pub Date : 2024-02-22 DOI: 10.1515/cti-2023-0038

R. Horikoshi, Hiroki Nakajima

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Learning about Confucian ecological ethics to promote education for sustainable development in Chinese secondary chemistry education 在中国中学化学教育中学习儒家生态伦理以促进可持续发展教育

Chemistry Teacher International Pub Date : 2024-02-12 DOI: 10.1515/cti-2023-0037

Baoyu Li, Ingo Eilks

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Learning about Confucian ecological ethics to promote education for sustainable development in Chinese secondary chemistry education 在中国中学化学教育中学习儒家生态伦理以促进可持续发展教育

Chemistry Teacher International Pub Date : 2024-02-12 DOI: 10.1515/cti-2023-0037

Baoyu Li, Ingo Eilks

引用次数: 0