Journal of Chemical Education最新文献_第10页

Integrated Instructions and Solvent Polarity Indicators: Reducing the Complexity of First-Time Distillation 集成指令和溶剂极性指示器：降低首次蒸馏的复杂性

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-09 DOI: 10.1021/acs.jchemed.4c00466

Patrick I. T. Thomson, Deborah Cleary

引用次数: 0

Welcome to 310 Environmental Working Group! A Group Project That Places Students in the Role of Consultants Helping Businesses Choose the Most Climate Friendly Fluorinated Gas 欢迎来到 310 环境工作组！一个让学生扮演顾问角色的小组项目，帮助企业选择对气候最友好的含氟气体

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-06 DOI: 10.1021/acs.jchemed.4c00479

Jessica C. D’eon, Sivani Baskaran, Jennifer A. Faust, Mima Staikova, Cora J. Young

{"title":"Welcome to 310 Environmental Working Group! A Group Project That Places Students in the Role of Consultants Helping Businesses Choose the Most Climate Friendly Fluorinated Gas","authors":"Jessica C. D’eon, Sivani Baskaran, Jennifer A. Faust, Mima Staikova, Cora J. Young","doi":"10.1021/acs.jchemed.4c00479","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00479","url":null,"abstract":"The Montreal Protocol is an international treaty that controls substances that deplete the ozone layer. Through the control of halogenated gases, it has been one of the most successful climate legislations to date. This success is driven by the interplay between chemical regulation and smart chemical design, demonstrating the positive impact chemistry can have on the world. This Article describes a group project that includes four assignments, a group presentation, and a writing task where students take on the role of consultants to assess the environmental friendliness of two fluorinated gases. Through the assignments students determine the global warming potential of two chemicals and pair this assessment with an evaluation of their potential to produce persistent products, such as trifluoroacetic acid, via atmospheric oxidation. Students worked together to take these, sometimes conflicting, pieces of evidence to make a final recommendation to their client as to the most “environmentally friendly” option in a mock Board of Directors meeting and then individually through a written recommendation. The project effectively addressed the learning goals of a third-year environmental chemistry class and was well received by students as a means of contextualizing the course material and providing students with a clear peer network in the class. This project is an effective application of fundamental chemistry topics (e.g., spectroscopy and the relationship between structure and reactivity) within a real-world context that emphasizes the ability of chemistry to have a positive impact on important environmental issues such as climate.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"136 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laboratory Safety Teams as an Evolving Community of Practice: Exploring the How and Why 实验室安全小组是一个不断发展的实践社区：探索如何和为什么

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-06 DOI: 10.1021/acs.jchemed.4c00702

Monica M. S. Nyansa, Jessica A. Martin, Kali A Miller, Kedmon N. Hungwe

{"title":"Laboratory Safety Teams as an Evolving Community of Practice: Exploring the How and Why","authors":"Monica M. S. Nyansa, Jessica A. Martin, Kali A Miller, Kedmon N. Hungwe","doi":"10.1021/acs.jchemed.4c00702","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00702","url":null,"abstract":"Reports of laboratory damage, personal injury, and death have triggered increasing concern over the academic safety culture and the safety education of those pursuing studies in the chemical sciences. Student-led laboratory safety teams (LSTs) within academic institutions serve as a new and expanding informal, bottom-up approach to improving the academic safety culture and safety education of student researchers. Since 2018, a workshop has been run by the American Chemical Society Division of Chemical Health and Safety to support graduate students in the chemical sciences in establishing and growing LSTs of their own. Here, we examine how LSTs within the different academic institutions have evolved into a community of practice (CoP) through these workshops and why the members have engaged in growing this CoP. We determine the current stage of the LST CoP and what values the members created and experienced through the evaluation of artifacts from 14 workshops conducted from 2018 to 2022, semistructured interviews with student researchers running the workshops, and a guided focus group interview with the three primary student leaders of the workshops. We are sharing this analysis with the chemical education community to provide others with insights into experimental ways to improve the safety education of those pursuing studies in the chemical sciences.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"11 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visualizing Symmetry: A Resource for Chemical Education with VMD and SYVA Programs 可视化对称性：使用 VMD 和 SYVA 程序的化学教育资源

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-06 DOI: 10.1021/acs.jchemed.4c00530

Qingyan Zeng, Jinglin Mu

{"title":"Visualizing Symmetry: A Resource for Chemical Education with VMD and SYVA Programs","authors":"Qingyan Zeng, Jinglin Mu","doi":"10.1021/acs.jchemed.4c00530","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00530","url":null,"abstract":"Symmetry, a common occurrence in nature, holds significant importance in the realm of chemistry education. However, students often struggle to visualize the symmetry elements of three-dimensional molecules and identify point groups using traditional textbooks. In order to address this challenge, we integrated SYVA into VMD for accurate determination of molecular point groups. Additionally, we have organized molecular point group materials to serve as an educational resource. The resource currently includes hundreds of unique molecules, with continuous expansion, to effectively demonstrate various symmetry elements within molecules and aid in determining point groups. Expanding on this resource, we have designed an educational activity focused on molecular symmetry. According to student feedback, utilizing VMD to showcase molecular point group files and visually represent molecular symmetry elements is beneficial for students in comprehending related concepts. This resource can serve as a valuable tool for teaching symmetry, offering interactivity, visual appeal, and offline accessibility, allowing for flexible use across different times and locations.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"1 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel General Chemistry Experiment for Freshmen: Transgenic Soybean Detection Based on Microfluidic Molecular Fluorescence Spectroscopy Analysis 面向高一新生的新型普通化学实验：基于微流控分子荧光光谱分析的转基因大豆检测

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-05 DOI: 10.1021/acs.jchemed.4c00668

Pintao Li, Min Gu, Ghazala Ashraf, Huiwen Xiong, Fei Cun, Xuting Chen, Jilie Kong, Xueen Fang

{"title":"A Novel General Chemistry Experiment for Freshmen: Transgenic Soybean Detection Based on Microfluidic Molecular Fluorescence Spectroscopy Analysis","authors":"Pintao Li, Min Gu, Ghazala Ashraf, Huiwen Xiong, Fei Cun, Xuting Chen, Jilie Kong, Xueen Fang","doi":"10.1021/acs.jchemed.4c00668","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00668","url":null,"abstract":"In this experiment, we present a microfluidic-based molecular fluorescence spectroscopy method for analyzing nucleic acids to identify transgenic soybeans. This method is integrated into a General Chemistry Experiment course tailored for freshmen. The primary goals of this course are to deepen student’s understanding of some important knowledge points of general chemistry, introduce students to experimental techniques at the micro- and nanoscale, help students understand the principles of molecular fluorescence spectroscopy and enzyme reaction kinetics, elucidate the relationship between chemistry and its practical applications, stimulate their interest in chemistry, and provide multidisciplinary perspectives and thinking. Over the period from 2021 to 2023, more than 180 freshmen enrolled in this course, and over 30 universities in China have initiated the advancement of this course. Most students successfully completed the experiment, achieving high completion rate and promising results. Participating students improved their practical skills and the ability to work collaboratively in a laboratory setting, which led to numerous innovative ideas and insights in related areas. Positive feedback from the students confirmed that the predetermined learning objectives were successfully achieved.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"8 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alligation Alternate: Borrowing a Useful Concept from the Pharmacy Curriculum 配药交替：从药学课程中借用一个有用的概念

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-05 DOI: 10.1021/acs.jchemed.4c00559

Peter A. C. McPherson, Iain G. Jack

引用次数: 0

Simple Nanostructured 3D Printed Objects: An Inside-Out View of Block Copolymer Self-Assembly by Fuse Deposition Modeling 简单的纳米结构三维打印物体：通过熔融沉积建模对嵌段共聚物自组装的由内而外的观察

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-04 DOI: 10.1021/acs.jchemed.4c00438

Laurent Rubatat, Alexandre Foucard, Frédéric Léonardi, Julien Maros, Virginie Pellerin

{"title":"Simple Nanostructured 3D Printed Objects: An Inside-Out View of Block Copolymer Self-Assembly by Fuse Deposition Modeling","authors":"Laurent Rubatat, Alexandre Foucard, Frédéric Léonardi, Julien Maros, Virginie Pellerin","doi":"10.1021/acs.jchemed.4c00438","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00438","url":null,"abstract":"Polymer 3D printing methods are now widely spread in educational strategies, whether for teachers to produce 3D objects, facilitating knowledge transfer, or directly for students to master a unique polymer processing method. Regarding block copolymer (BCP) microphase separation and self-assembly, which occurs in volume and at the nanoscale, they are both challenging to teach in the classroom without adapted materials. The present paper describes a graduate student laboratory project with two objectives: first, to train students on 3D printing and BCP microphase separation; second, to produce a macroscale 3D representation of the inner BCP microphase separation, such as an inside-out demonstration of the nanostructure, which can be used as a comprehensive object. Interestingly, the project covers a large range of polymer processing and characterization methods, raising fundamental discussions between students and educators. In addition, in this paper we demonstrate the feasibility to easily produce two-phase nanostructured 3D printed objects by fuse deposition modeling from BCP filament using exclusively commercially available means.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"2 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Qualitative Investigation of Higher Education Chemistry Students’ Perceptions of What Scientists Do 高等教育化学专业学生对科学家工作认知的定性调查

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-04 DOI: 10.1021/acs.jchemed.4c00334

Brianna L. Martinez, Zahilyn D. Roche Allred, Sonia M. Underwood

{"title":"A Qualitative Investigation of Higher Education Chemistry Students’ Perceptions of What Scientists Do","authors":"Brianna L. Martinez, Zahilyn D. Roche Allred, Sonia M. Underwood","doi":"10.1021/acs.jchemed.4c00334","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00334","url":null,"abstract":"An understanding of how scientists construct knowledge and make sense of the natural world (i.e., science practices) is critical not just to those with careers in the science field but for all members of society. Such understanding empowers people to make more informed decisions about science and technology issues and reduce susceptibility to pseudoscientific claims or misleading presentation of scientific data that can result in science denial. Considering this, current educational reforms aim to better facilitate all students’ understanding and use of scientific practices within science classrooms and teaching laboratories. Beyond these formal teaching environments, chemistry students at the undergraduate and graduate levels have opportunities to engage in authentic research experiences that serve as a platform for students to genuinely engage with the practices of scientists. This qualitative study used semistructured interviews of chemistry undergraduate (<i>n</i> = 5) and graduate (<i>n</i> = 14) students involved in traditional research experiences to investigate their perceptions regarding the activities that scientists undertake to generate new knowledge. The analysis identified 15 unique activities described by the students and delineated three themes related to their perceptions of scientific inquiry: (1) doing science means performing an experiment, (2) science as a linear process, and (3) scientists and researchers engage in distinct activities/practices. These findings align with previous research of chemistry students’ conceptions of scientific inquiry and call attention to the need for further support in helping students refine their perceptions of what scientists do.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"8 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Simple Method for the Preparation and Characterization of Nanostructured Lipid Carriers (NLC) Formulations for Cutaneous Use 制备和表征皮肤用纳米结构脂质载体（NLC）制剂的简单方法

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-04 DOI: 10.1021/acs.jchemed.4c00503

Ana C. Silva, Joana A. Loureiro

{"title":"A Simple Method for the Preparation and Characterization of Nanostructured Lipid Carriers (NLC) Formulations for Cutaneous Use","authors":"Ana C. Silva, Joana A. Loureiro","doi":"10.1021/acs.jchemed.4c00503","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00503","url":null,"abstract":"Nanostructured lipid carriers (NLC) are promising nanocarriers for improving the delivery of drugs and cosmetics. This laboratory study aims to familiarize Master’s level students from the areas of Pharmaceutical Sciences, Biology and Biomedical Engineering with the applications of nanotechnology in healthcare, pharmaceuticals, and cosmetics. In particular, it provides students with essential knowledge on the preparation and characterization of formulations of lipid nanoparticles, namely, NLC, for cutaneous use. Ibuprofen has been used as a lipophilic drug model. The experimental protocol included two class sessions of 120 min each. Collaboration in groups of three students facilitated a comprehensive exploration of the learning methods. The students prepared NLC loaded with a model lipophilic drug (ibuprofen) with the aim of incorporating it into a hydrogel to facilitate their cutaneous use. The ibuprofen-loaded NLC were characterized in terms of particle size, polydispersity index (PDI), zeta potential (ZP) and encapsulation efficiency (EE). Rheological characterization of the prepared hydrogel containing ibuprofen-loaded NLC was then carried out. Both laboratory sessions were successful, demonstrating a strong understanding of the concepts taught. Student scores ranged from 93% to 100%, reflecting a high level of comprehension.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"61 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Computer Simulations on Student Ability to Translate Chemical Representations When Learning the Particulate Nature of Matter Concept 学习物质的微粒性质概念时，计算机模拟对学生转换化学表象能力的影响

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2024-09-03 DOI: 10.1021/acs.jchemed.4c00964

Bokai Hu, Liying Zhu, Hualin Bi

{"title":"Effect of Computer Simulations on Student Ability to Translate Chemical Representations When Learning the Particulate Nature of Matter Concept","authors":"Bokai Hu, Liying Zhu, Hualin Bi","doi":"10.1021/acs.jchemed.4c00964","DOIUrl":"https://doi.org/10.1021/acs.jchemed.4c00964","url":null,"abstract":"The particulate nature of matter (PNM) concept poses a significant challenge for numerous students, primarily because it is abstract and difficult to visualize. Computer simulations (CSs) can aid students in visualizing microscopic particles using particle models. Despite the wide use of CSs in the development of student understanding of the submicroscopic representation of particles, for topics such as PNM, additional representations such as macroscopic and symbolic representations are typically present, which add additional complexity. Facilitating students’ meaningful understanding of the PNM requires careful scaffolding to help them establish interconnections and transformations among different chemical representations. This study describes the development and testing of activities that use CSs to introduce PNM concepts. The findings revealed that CSs significantly enhanced middle school students’ proficiency in translating between various kinds of chemical representations when learning the PNM concept. Specifically, their competence in translating between macroscopic and submicroscopic representations was significantly improved, while their understanding of symbolic and submicroscopic representations was moderately improved. We hypothesize that engaging with CSs provides a more comprehensive particle model that incorporates diverse dimensions and offers students a modeling process. This study proposes implications for incorporating CSs during instruction and provides evidence-based support for how CSs could be useful in promoting chemical representations of topics related to the PNM.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"6 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0