Journal of Chemical Education最新文献_第5页

Detecting Color Change with an Arduino-Based Sensor System: The Iodine Clock Experiment 基于arduino传感器系统的颜色变化检测：碘时钟实验

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-16 DOI: 10.1021/acs.jchemed.6c00273

Özgür K.Çoban, Semih Özden, Ayşe Yalçın Çelik

{"title":"Detecting Color Change with an Arduino-Based Sensor System: The Iodine Clock Experiment","authors":"Özgür K.Çoban, Semih Özden, Ayşe Yalçın Çelik","doi":"10.1021/acs.jchemed.6c00273","DOIUrl":"https://doi.org/10.1021/acs.jchemed.6c00273","url":null,"abstract":"In chemistry laboratories, microcontroller boards canbe used toreduce observer-dependent variability in student measurements. Thistechnical report describes a low-cost Arduino-based sensor designthat automatically detects the moment of color change in the iodineclock experiment, digitally records the reaction time, and emits anaudible alert. The activity was implemented with 19 preservice chemistryteachers organized into four groups; one five-member group used theArduino-based system, and interviews were conducted with these fiveparticipants to collect their views on its possible benefits for chemistrylaboratory applications. Compared with traditional stopwatch-basedtiming, the Arduino-based system generally produced a narrower rangeand lower observed variability across repeated measurements, particularlyunder conditions with longer reaction times. In addition, participantsin the Arduino group suggested that the design may offer accessibility-relatedbenefits, as its audible feedback and sensor-based end point detectioncould reduce reliance on visual color judgment in laboratory activities.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"6028–6034"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173626","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

Multidimensional Effects of Decision Tree-Based Scientific Modeling Practice on High School Students’ Learning of Redox Reactions 基于决策树的科学建模实践对高中生氧化还原反应学习的多维效应

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-14 DOI: 10.1021/acs.jchemed.6c00225

Saetbyeol Moon, Seoung-Hey Paik

{"title":"Multidimensional Effects of Decision Tree-Based Scientific Modeling Practice on High School Students’ Learning of Redox Reactions","authors":"Saetbyeol Moon, Seoung-Hey Paik","doi":"10.1021/acs.jchemed.6c00225","DOIUrl":"https://doi.org/10.1021/acs.jchemed.6c00225","url":null,"abstract":"Thisstudy examined the multidimensional effects of a decisiontree-based scientific modeling program on high school students’learning of redox reactions and explored the applicability of findingsfrom prior small-scale studies in a larger classroom context. Participantswere 96 students from a general high school, and the program was implementedover ten instructional sessions using a single-group pre-test–post-testdesign. The instructional program integrated scientific modeling practiceswithin the 5E learning cycle. Using the Orange3 platform, studentsexternalized their judgment rules as data through model construction,compared their judgments with AI predictions through model testing,and reconstructed concepts by diagnosing errors through model revision.Program effects were examined in terms of academic achievement, understandingof redox reaction models, judgment confidence, learning experiences,and perceived potential for transfer. Results showed statisticallysignificant improvements in overall academic achievement from pre-testto post-test (p < 0.001), with a very large effectsize (d = 2.43) across all model domains. Students’confidence in redox judgment also increased substantially (d = 0.93), alongside the development of a more pluralisticview of models that recognized contextual appropriateness and limitations.In addition, the interpretable AI-based modeling process functionedas cognitive scaffolding that supported metacognitive reflection duringmodel construction, testing, and revision. Notably, a large proportionof students reported that decision tree-based reasoning could be appliedbeyond chemistry learning to everyday decision making and future academicor career contexts, indicating features of high-road transfer. Thesefindings suggest that interpretable AI-supported scientific modelingpractice can foster robust cognitive, affective, and process-orientedlearning outcomes in regular high school classrooms.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"5303–5316"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173629","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

Graphical Analysis of Ordinary Differential Equations in Biochemical Kinetics: A Pedagogical Framework for Stability and Bifurcations 生化动力学常微分方程的图解分析：稳定性和分岔的教学框架

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-07 DOI: 10.1021/acs.jchemed.6c00316

Krishnamachari Sriram

{"title":"Graphical Analysis of Ordinary Differential Equations in Biochemical Kinetics: A Pedagogical Framework for Stability and Bifurcations","authors":"Krishnamachari Sriram","doi":"10.1021/acs.jchemed.6c00316","DOIUrl":"https://doi.org/10.1021/acs.jchemed.6c00316","url":null,"abstract":"Graphical analysis provides an intuitive yet rigorousframeworkfor understanding dynamical behavior in biochemical systems. Thisarticle develops a pedagogical framework for the analysis of one-dimensionalautonomous ordinary differential equation (ODE) models arising inbiochemistry and biophysics. Using the production–loss dynamicsof a protein P as a foundational template, we systematicallyintroduce increasing regulatory complexity through (i) Michaelis–Mentenactivation, (ii) cooperative Hill kinetics, and (iii) mutual inhibition.The resulting linear and nonlinear models are analyzed using rate–balanceand rate–difference representations, together with phase-linediagrams that encode the underlying one-dimensional vector field.These graphical constructions enable the systematic identificationof steady states and determination of their qualitative stability.Slope-based graphical arguments are further employed to detect theonset of bifurcations through the loss of hyperbolicity at equilibrium.Although slope information alone does not fully determine the specificbifurcation type, the vanishing of the local derivative provides areliable graphical indicator of qualitative change, thereby strengtheningthe connection between visual intuition and formal dynamical systemsanalysis. In addition, the instructional implementation of this frameworkis evaluated through structured classroom deployment and assessment-basedanalysis. The results indicate improved conceptual understanding,enhanced ability to interpret dynamical behavior graphically, andincreased student confidence in linking mathematical formalism withbiological intuition. These findings highlight the importance of integratingevaluation-driven pedagogical strategies to validate and refine teachingapproaches in mathematical chemistry education.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"5574–5585"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173646","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

Integrating Advanced Research Methods into Teaching Practice: Optimization of Water Caltrop Shell Extract Yield as a Green Corrosion Inhibitor Based on Response Surface Methodology 将先进的研究方法与教学实践相结合：基于响应面法优化绿色缓蚀剂菱角壳提取物收率

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-22 DOI: 10.1021/acs.jchemed.6c00361

Hualiang Huang, Mengli Ye, Xiaotao Zheng

{"title":"Integrating Advanced Research Methods into Teaching Practice: Optimization of Water Caltrop Shell Extract Yield as a Green Corrosion Inhibitor Based on Response Surface Methodology","authors":"Hualiang Huang, Mengli Ye, Xiaotao Zheng","doi":"10.1021/acs.jchemed.6c00361","DOIUrl":"https://doi.org/10.1021/acs.jchemed.6c00361","url":null,"abstract":"Traditional laboratory teaching often relies heavilyon confirmatoryexperiments, which may provide limited opportunities for studentsto practice experimental design, data interpretation, and model-baseddecision-making. Building on our group’s prior work, we designeda research-oriented laboratory experiment applicable to upper-divisionundergraduate and graduate instruction. In this module, response surfacemethodology (RSM), including Box–Behnken design-based quadraticmodeling, ANOVA, and response surface analysis, was applied to optimizethe extraction yield of water caltrop shell extract as a green corrosioninhibitor. The model-derived optimum was approximately 50 °C,60 min, 60% ethanol (v/v), and 27 mL/g, and practical classroom validationwas conducted at 50 °C, 60 min, 60% ethanol (v/v), and 30 mL/g.Through experimental design, extraction operation, statistical analysis,and model validation, the module helps students connect hands-on experimentationwith quantitative reasoning. Overall, this activity provides a practicalexample of integrating research-based optimization, green chemistry,and data-driven decision-making into advanced laboratory teaching.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"5887–5896"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173762","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

From Unsure to Decided: A Science Careers Course Model That Elevates Career Readiness and Competency 从不确定到决定：一个提升职业准备和能力的科学职业课程模型

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-28 DOI: 10.1021/acs.jchemed.6c00379

Ana Ramirez, Marlen Lopez, Coby Zadeh, Li Ye

{"title":"From Unsure to Decided: A Science Careers Course Model That Elevates Career Readiness and Competency","authors":"Ana Ramirez, Marlen Lopez, Coby Zadeh, Li Ye","doi":"10.1021/acs.jchemed.6c00379","DOIUrl":"https://doi.org/10.1021/acs.jchemed.6c00379","url":null,"abstract":"As college students near graduation, many remain undecidedabouttheir career paths. To bridge the gap between college education andemployment, an upper-division elective career course was designedfor chemistry and biochemistry majors. The course introduces a widerange of science-oriented career pathways through advanced seminarswith local industry scientists, panel discussions with science professionals,training that enhances students’ employment skills, and studentgroup presentations and final research projects. The purpose of thisstudy was to evaluate the extent to which the course affected students’career readiness, career competency, and potential career interests.Repeated-measures surveys were administered throughout the semester,complemented by exit tickets and open-ended responses after each class.Results indicated that both career readiness and competency increasedsignificantly over the semester. The largest improvements were instudents’ confidence in their understanding of science employmentsectors and in their competency in career and self-development. Atthe beginning of the semester, half of the students felt unsure abouttheir career interest. However, toward the end, almost all studentswho expressed that they had decided on a career path and were exploringa much wider array of options. Importantly, students who began undecideddemonstrated greater growth in career readiness and competency thanthose who had identified a career path at the outset. This study establishesa science-oriented career-development course model within the sciencecurriculum. Findings suggest that such a course is an effective investmentthat raises awareness of career opportunities, supports identificationof career interests, and improves career readiness and competencyfor the workforce.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"5344–5358"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173878","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

The Science of Design: Introducing Design of Experiments (DoE) through a Hydrogel-Based High School Chemistry Investigation 设计的科学：通过一项基于水凝胶的高中化学调查来介绍实验设计

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-09 DOI: 10.1021/acs.jchemed.6c00856

Penelope E. Jankoski, Jamie Sorrell, Harrison A. Livingston, Dori C. Harcharik, Claire M. Clemons, Tristan D. Clemons

{"title":"The Science of Design: Introducing Design of Experiments (DoE) through a Hydrogel-Based High School Chemistry Investigation","authors":"Penelope E. Jankoski, Jamie Sorrell, Harrison A. Livingston, Dori C. Harcharik, Claire M. Clemons, Tristan D. Clemons","doi":"10.1021/acs.jchemed.6c00856","DOIUrl":"https://doi.org/10.1021/acs.jchemed.6c00856","url":null,"abstract":"Creating lessons that connect classroomcontent to real-worldapplicationcan enhance high school students’ interest in STEM curricula.The scientific method is one such component of the curriculum thatcan be meaningfully connected to techniques and practices used acrossa range of STEM fields. Specifically, Design of Experiments (DoE)is a statistical process widely used in STEM industries and researchand development contexts to efficiently collect and analyze scientificdata, yet it is rarely taught at the high school level. Importantly,DoE also introduces foundational concepts in structured data generation,multivariable analysis, and pattern recognition that underpin emergingartificial intelligence (AI) and machine learning (ML) approaches.To bridge this gap between methodological understanding and real-worldapplication, this study implemented a hands-on DoE-based lesson focusedon polymer hydrogels, which was assessed in a high school scienceclassroom with students across grades 9–12. Pre- and postlessonassessments, consisting of multiple-choice, short-answer, and conceptualunderstanding questions, were used to evaluate shifts in students’content knowledge and understanding of the DoE approach. The mediancorrect response rate for the conceptual understanding section increasedfrom 33.33% to 66.67% between the pre- and postassessments. Additionally,while response rates for conceptual questions increased followingthe intervention, a statistically significant improvement in responseaccuracy was not observed. This pilot study serves as a valuable startingpoint for designing STEM lessons that introduce students to DoE asa framework for experimental design, while also providing insightinto student understanding of this approach─an essential skillset for preparing students for future STEM workforce demands.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"5689–5697"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173359","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 Students-as-Partners Approach to Developing an Advanced Chemistry Laboratory Experiment: Synthesis and Purification of 2-Phenylcyclohexanol 以学生为合作伙伴的方式开展高级化学实验室实验：2-苯基环己醇的合成和纯化

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-08-31 DOI: 10.1021/acs.jchemed.6c00668

Peter J. Rayner, Samantha K. Furfari, David S. Pugh, Kieran Godfree, Harry J. Roper, Julia S. Russ, Stuart J. Taylor-Lavill, Ruby K. Williams

{"title":"A Students-as-Partners Approach to Developing an Advanced Chemistry Laboratory Experiment: Synthesis and Purification of 2-Phenylcyclohexanol","authors":"Peter J. Rayner, Samantha K. Furfari, David S. Pugh, Kieran Godfree, Harry J. Roper, Julia S. Russ, Stuart J. Taylor-Lavill, Ruby K. Williams","doi":"10.1021/acs.jchemed.6c00668","DOIUrl":"https://doi.org/10.1021/acs.jchemed.6c00668","url":null,"abstract":"The efficacy of a Students-as-Partners (SaP) approachto the designof an advanced chemistry practical for year 3 undergraduate studentsis exemplified. Student consultation identified key priorities forlaboratory teaching, which subsequently informed a codesign processinvolving four student partners. The resulting practical integratesair-sensitive synthesis, purification by gradient flash column chromatography,TLC visualization using staining methods, and spectroscopic determinationof the reaction outcome within a single laboratory experience. Thelaboratory experience and subsequent feedback revealed a positiveimpact on the cohort’s confidence in performing the specificlaboratory techniques, while simultaneously being an enjoyable experience.The study illustrates the potential for SaP approaches to developpractical experiments that achieve the desired practical skill acquisitionand align with students’ educational priorities and expectations.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"5941–5948"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173374","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

Go-Game-Driven Introduction to Monte Carlo Simulation of Langmuir Adsorption 围棋游戏驱动的朗缪尔吸附蒙特卡罗模拟入门

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-12 DOI: 10.1021/acs.jchemed.6c00569

Hao Zhang

引用次数: 0

Using RAMP to Incorporate Risk-Based Safety Competencies into the Development of Undergraduate Forensic Chemistry and Toxicology Courses 使用RAMP将基于风险的安全能力纳入本科法医化学和毒理学课程的开发

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-08 DOI: 10.1021/acs.jchemed.5c01698

Eduardo G. de Campos, Samuella B. Sigmann

引用次数: 0

Bridging the Gap: Enhancing Intermolecular Forces Understanding with IMFs Cards 弥合差距：用IMFs卡加强分子间力的理解

IF 3 3区教育学

Journal of Chemical Education Pub Date : 2026-10-13 Epub Date: 2026-09-04 DOI: 10.1021/acs.jchemed.5c01165

Erlina, Maria Ulfah, Eny Enawaty, Azwa Fadilla Wafiq, Venni Ika Susanti

{"title":"Bridging the Gap: Enhancing Intermolecular Forces Understanding with IMFs Cards","authors":"Erlina, Maria Ulfah, Eny Enawaty, Azwa Fadilla Wafiq, Venni Ika Susanti","doi":"10.1021/acs.jchemed.5c01165","DOIUrl":"https://doi.org/10.1021/acs.jchemed.5c01165","url":null,"abstract":"Intermolecularforces (IMFs) are a fundamental yet challengingtopic in chemistry, as students often struggle to connect abstractconcepts with observable phenomena. This study reports the development and evaluation of IMF cards,a card-based learning medium designed to integrate multiple levelsof chemical representation, including definitions, diagrams, relativestrengths, and molecular examples. The activity engages students instructured collaborative gameplay that promotes peer discussion andconceptual reasoning at a foundational level. The effectiveness ofthe cards was evaluated using a one-group pre-test–post-testdesign involving 53 students. The results show a statistically significantimprovement in students’ understanding of intermolecular forces(p < 0.001), particularly in identifying and describinginteraction types. Students also reported positive perceptions ofthe activity. These findings suggest that the IMF card activity maysupport students’ recognition and description of intermolecularforces in selected molecular systems, particularly in relation toidentifying the dominant interactions between molecules.","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"103 10","pages":"6056–6062"},"PeriodicalIF":3.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149173480","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