首页 > 最新文献

World Journal of Chemical Education最新文献

英文 中文
ELLs in Higher Education: Learning Strategy Use and Goal Orientation 高等教育中的ELLs:学习策略运用与目标导向
Pub Date : 2022-02-20 DOI: 10.5430/wje.v12n1p45
Hong Shi
This study examined language learning strategy and goal orientation of college-level English Language Learners (ELLs) by using a questionnaire survey. It analyzed the relationship between goal orientation and demographic characteristics and further explored the correlation between learning strategy use and goal orientation. The results of the study show that non-Asian ELLs had a greater performance goal orientation tendency than Asian ELLs. ELLs who had bachelor’s degree had a higher level of mastery goal orientation, as well as performance-approach goals than those who had master’s and doctoral degree. Female ELLs had a higher level of mastery goal orientation than male ELLs. Mastery goal orientation is positively related to all types of strategy, and it possessed the beneficial role in strategy use. Effective instructional methods for ELLs were provided to promote their adopting of mastery goals.
本研究采用问卷调查的方法对大学英语学习者的语言学习策略和目标取向进行了研究。分析了目标取向与人口统计学特征的关系,并进一步探讨了学习策略使用与目标取向的关系。研究结果表明,非亚裔学生表现出比亚裔学生更大的绩效目标取向倾向。具有学士学位的ELLs比具有硕士学位和博士学位的ELLs具有更高的掌握目标取向和绩效方法目标。女性大学生的掌握目标取向水平高于男性大学生。掌握目标取向与各类策略均呈正相关,在策略使用中具有有益作用。提供了有效的教学方法,以促进外语学习者对掌握目标的采用。
{"title":"ELLs in Higher Education: Learning Strategy Use and Goal Orientation","authors":"Hong Shi","doi":"10.5430/wje.v12n1p45","DOIUrl":"https://doi.org/10.5430/wje.v12n1p45","url":null,"abstract":"This study examined language learning strategy and goal orientation of college-level English Language Learners (ELLs) by using a questionnaire survey. It analyzed the relationship between goal orientation and demographic characteristics and further explored the correlation between learning strategy use and goal orientation. The results of the study show that non-Asian ELLs had a greater performance goal orientation tendency than Asian ELLs. ELLs who had bachelor’s degree had a higher level of mastery goal orientation, as well as performance-approach goals than those who had master’s and doctoral degree. Female ELLs had a higher level of mastery goal orientation than male ELLs. Mastery goal orientation is positively related to all types of strategy, and it possessed the beneficial role in strategy use. Effective instructional methods for ELLs were provided to promote their adopting of mastery goals.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75286101","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
Ready or Not: Gulf Country Teachers’ Challenges toward Teaching Online Courses in Emergency Cases in Higher Education 准备好了没有:海湾国家教师在高等教育紧急情况下教授在线课程的挑战
Pub Date : 2022-02-15 DOI: 10.5430/wje.v12n1p52
A. Zeyab, R. Larkins, Monirah Alsalim, Shimaa A. Albloushi
The purpose of this study was to determine the challenges faced by teachers from the Arabian Gulf countries of Saudi Arabia and Kuwait while teaching virtual online courses. Because online learning in higher education in these countries had not occurred before the current pandemic, the teachers and students faced new challenges for the first time, including online communication, inadequate training, insufficient practice, and incompetence in online assessment. Seventy-six teachers of higher education in Kuwait or Saudi Arabia participated in this study, which was a survey created by the first author to determine the effectiveness of communication, training, practicing and assessing students’ performance during the pandemic. Results indicated that no differences were found between the two countries; while participants felt that training was adequate for the task of converting to remote teaching, they were concerned about nonverbal aspects of communication and assessing online work. Suggestions included obtaining participants from other Gulf countries, refining the survey, and involving different types of institutions such as private colleges. The results of this study imply that for many teachers, improvements in communication and assessment are necessary to improve online teaching, which is likely to continue in these countries after the pandemic is over.
本研究的目的是确定来自沙特阿拉伯和科威特等阿拉伯海湾国家的教师在教授虚拟在线课程时所面临的挑战。由于在本次大流行之前,这些国家的高等教育尚未实现在线学习,教师和学生首次面临在线交流、培训不足、实践不足、在线评估能力不足等新挑战。科威特或沙特阿拉伯的76名高等教育教师参加了这项研究,这是由第一作者创建的一项调查,旨在确定大流行期间沟通、培训、练习和评估学生表现的有效性。结果表明,两国之间没有发现差异;虽然与会者认为培训足以完成向远程教学转变的任务,但他们担心沟通的非语言方面和评估在线工作。建议包括从其他海湾国家获得参与者,改进调查,以及让不同类型的机构(如私立大学)参与调查。这项研究的结果表明,对于许多教师来说,改善沟通和评估对于改善在线教学是必要的,在大流行结束后,这种情况可能会在这些国家继续下去。
{"title":"Ready or Not: Gulf Country Teachers’ Challenges toward Teaching Online Courses in Emergency Cases in Higher Education","authors":"A. Zeyab, R. Larkins, Monirah Alsalim, Shimaa A. Albloushi","doi":"10.5430/wje.v12n1p52","DOIUrl":"https://doi.org/10.5430/wje.v12n1p52","url":null,"abstract":"The purpose of this study was to determine the challenges faced by teachers from the Arabian Gulf countries of Saudi Arabia and Kuwait while teaching virtual online courses. Because online learning in higher education in these countries had not occurred before the current pandemic, the teachers and students faced new challenges for the first time, including online communication, inadequate training, insufficient practice, and incompetence in online assessment. Seventy-six teachers of higher education in Kuwait or Saudi Arabia participated in this study, which was a survey created by the first author to determine the effectiveness of communication, training, practicing and assessing students’ performance during the pandemic. Results indicated that no differences were found between the two countries; while participants felt that training was adequate for the task of converting to remote teaching, they were concerned about nonverbal aspects of communication and assessing online work. Suggestions included obtaining participants from other Gulf countries, refining the survey, and involving different types of institutions such as private colleges. The results of this study imply that for many teachers, improvements in communication and assessment are necessary to improve online teaching, which is likely to continue in these countries after the pandemic is over.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"113 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73129778","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
In-situ Surface Enhanced Electrochemical Chemiluminescence and Raman Scattering with Screen-printed Gold- and Silver-Electrodes 丝网印刷金和银电极的原位表面增强电化学化学发光和拉曼散射
Pub Date : 2022-02-13 DOI: 10.12691/wjce-10-1-4
A. Habekost
Redox reactions on goldand silver screen-printed electrodes (SPE) can be monitored electrochemically using cyclic voltammetry (CV) and spectroscopically by electrochemical chemiluminescence (ECL). Alongside conventional anionic ECL, cathionic ECL with in-situ generated, finely-dispersed Au as a co-reagent is also presented. Raman spectroscopy is a powerful technique that can be employed for the detection of ultralow concentrations when promoted by an enhancement of the scattering process. Simple in-situ electrochemical modification of the electrode leads to surface-enhanced Raman intensities.
利用循环伏安法(CV)和电化学化学发光法(ECL)对金、银丝网印刷电极(SPE)上的氧化还原反应进行了电化学监测。除了传统的阴离子ECL外,还提出了用原位生成的、细分散的Au作为共试剂的阴离子ECL。拉曼光谱是一种强大的技术,当散射过程增强时,可以用于检测超低浓度。简单的原位电化学修饰电极导致表面拉曼强度增强。
{"title":"In-situ Surface Enhanced Electrochemical Chemiluminescence and Raman Scattering with Screen-printed Gold- and Silver-Electrodes","authors":"A. Habekost","doi":"10.12691/wjce-10-1-4","DOIUrl":"https://doi.org/10.12691/wjce-10-1-4","url":null,"abstract":"Redox reactions on goldand silver screen-printed electrodes (SPE) can be monitored electrochemically using cyclic voltammetry (CV) and spectroscopically by electrochemical chemiluminescence (ECL). Alongside conventional anionic ECL, cathionic ECL with in-situ generated, finely-dispersed Au as a co-reagent is also presented. Raman spectroscopy is a powerful technique that can be employed for the detection of ultralow concentrations when promoted by an enhancement of the scattering process. Simple in-situ electrochemical modification of the electrode leads to surface-enhanced Raman intensities.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90116757","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: 1
Conditions Fostering International Graduate Students’ Happiness and Engagement During the COVID-19 Pandemic 在2019冠状病毒病大流行期间促进国际研究生快乐和参与的条件
Pub Date : 2022-02-12 DOI: 10.5430/wje.v12n1p1
W. Ankomah
This paper focuses on eight conditions that kept international master’s students (IMS) in a Southern Ontario university happy and engaged in their studies during the first and second waves of the COVID-19 pandemic. Using the first phase of the Appreciative Inquiry’s (AI) 4-D cycle—i.e., discovery—this doctoral study conducted 14 individual interviews and three focus group discussions to identify conditions that made the IMS students happier and more engaged despite pandemic-related challenges. The study is crucial in advancing positive experiences of IMS because existing literature has focused primarily on their challenges and problems. The study’s use of AI, a strength-based theoretical and methodological approach, suggests the need to highlight the quality experiences of this minoritized group. Data revealed specific factors that brought about happiness and boosted IMS engagement in their studies, namely: financial and emotional support from family; responsive instructors; employment opportunities during the pandemic; and learning and engaging in extracurricular activities with colleagues and friends. Other conditions also proved crucial to participants’ happiness and engagement in their studies, including: professionalism of non-teaching staff; the institution’s learning management system and supporting online platforms; virtual access to campus software and other learning resources; and reduced travel time. Study findings aim to inform international student policy and enrich the international student experience literature.
本文重点分析了南安大略省一所大学国际硕士生在第一波和第二波新冠肺炎大流行期间保持快乐和学习的八个条件。使用赏识性调查(AI) 4-D循环的第一阶段,即:这项博士研究进行了14次个人访谈和3次焦点小组讨论,以确定使IMS学生更快乐和更投入的条件,尽管面临与流行病相关的挑战。这项研究对促进IMS的积极经验至关重要,因为现有文献主要集中在他们的挑战和问题上。该研究使用人工智能,这是一种基于优势的理论和方法方法,表明有必要强调这一少数群体的优质体验。数据揭示了带来幸福感和提高IMS学习参与度的具体因素,即:来自家庭的经济和情感支持;响应教师;大流行期间的就业机会;与同事和朋友一起学习和参加课外活动。其他条件也被证明对参与者的快乐和学习投入至关重要,包括:非教学人员的专业精神;学校的学习管理系统及配套的网络平台;虚拟访问校园软件和其他学习资源;减少了旅行时间。研究结果旨在为国际学生政策提供信息,并丰富国际学生体验文献。
{"title":"Conditions Fostering International Graduate Students’ Happiness and Engagement During the COVID-19 Pandemic","authors":"W. Ankomah","doi":"10.5430/wje.v12n1p1","DOIUrl":"https://doi.org/10.5430/wje.v12n1p1","url":null,"abstract":"This paper focuses on eight conditions that kept international master’s students (IMS) in a Southern Ontario university happy and engaged in their studies during the first and second waves of the COVID-19 pandemic. Using the first phase of the Appreciative Inquiry’s (AI) 4-D cycle—i.e., discovery—this doctoral study conducted 14 individual interviews and three focus group discussions to identify conditions that made the IMS students happier and more engaged despite pandemic-related challenges. The study is crucial in advancing positive experiences of IMS because existing literature has focused primarily on their challenges and problems. The study’s use of AI, a strength-based theoretical and methodological approach, suggests the need to highlight the quality experiences of this minoritized group. Data revealed specific factors that brought about happiness and boosted IMS engagement in their studies, namely: financial and emotional support from family; responsive instructors; employment opportunities during the pandemic; and learning and engaging in extracurricular activities with colleagues and friends. Other conditions also proved crucial to participants’ happiness and engagement in their studies, including: professionalism of non-teaching staff; the institution’s learning management system and supporting online platforms; virtual access to campus software and other learning resources; and reduced travel time. Study findings aim to inform international student policy and enrich the international student experience literature.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80288392","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: 1
Teachers’ Beliefs: Positive or Negative Indicators of Inquiry-Based Science Teaching? 教师信念:探究性科学教学的积极指标还是消极指标?
Pub Date : 2022-02-12 DOI: 10.5430/wje.v12n1p17
S. Mohammed
Inquiry-based science teaching is an innovative pedagogy that is more effective than traditional instruction in promoting scientific literacy. However, teachers must develop strong favourable beliefs about inquiry teaching before they can successfully employ it to improve students’ learning outcomes. Despite its importance few studies have been done to examine teachers’ beliefs about inquiry teaching in places, like Africa, where there are serious inquiry curricula implementation challenges. This study investigated whether teachers’ beliefs are positive or negative indicators of inquiry-based science teaching. Convergent parallel mixed methods was used for the study. Purposive and stratified random sampling were used to select 308 and subsample of 18 integrated science teachers from public and private junior high schools (JHSs) from urban and rural areas. Administration of questionnaires and semi-structured interviews were used for the quantitative and qualitative data collection. The questionnaire has content and construct validities and is reliable. The interview schedule is credible and dependable. One finding suggests that most teachers in the research setting hold weak beliefs about inquiry teaching but strong beliefs about traditional instruction, that are negative indicators of inquiry-based science teaching. Other findings indicate that there are significant school type and academic qualification differences in teachers’ beliefs about inquiry-based science teaching. One implication of the findings is that currently most teachers in the study context do not hold strong positive beliefs necessary for the implementation of inquiry-based science curricula. It is recommended that regular inquiry-based in-service trainings be designed to improve teachers’ beliefs. It is also recommended that inquiry-based in-service trainings should be designed based on teachers’ school type and academic qualifications.
探究性科学教学是一种比传统教学更有效地促进科学素养的创新教学法。然而,教师必须对探究式教学产生强烈的好感,才能成功地运用它来提高学生的学习成果。尽管它很重要,但很少有研究调查教师对研究性教学的看法,比如在非洲,那里存在严重的研究性课程实施挑战。本研究探讨教师信念是探究性科学教学的正面或负面指标。采用收敛并行混合方法进行研究。采用目的抽样和分层随机抽样的方法,选取城乡公办和民办初中综合科学教师308名和亚样本18名。定量和定性数据的收集采用问卷调查和半结构化访谈的管理。问卷具有内容效度和结构效度,信度高。面试时间表是可信和可靠的。一项发现表明,研究环境中的大多数教师对探究性教学的信念较弱,但对传统教学的信念很强,这是探究性科学教学的负面指标。其他研究结果显示,教师对探究性科学教学的信念存在显著的学校类型和学历差异。研究结果的一个含义是,目前研究背景下的大多数教师对实施探究性科学课程没有强烈的积极信念。建议定期设计以探究为基础的在职培训,以改善教师的信念。还建议根据教师的学校类型和学历来设计以探究为基础的在职培训。
{"title":"Teachers’ Beliefs: Positive or Negative Indicators of Inquiry-Based Science Teaching?","authors":"S. Mohammed","doi":"10.5430/wje.v12n1p17","DOIUrl":"https://doi.org/10.5430/wje.v12n1p17","url":null,"abstract":"Inquiry-based science teaching is an innovative pedagogy that is more effective than traditional instruction in promoting scientific literacy. However, teachers must develop strong favourable beliefs about inquiry teaching before they can successfully employ it to improve students’ learning outcomes. Despite its importance few studies have been done to examine teachers’ beliefs about inquiry teaching in places, like Africa, where there are serious inquiry curricula implementation challenges. This study investigated whether teachers’ beliefs are positive or negative indicators of inquiry-based science teaching. Convergent parallel mixed methods was used for the study. Purposive and stratified random sampling were used to select 308 and subsample of 18 integrated science teachers from public and private junior high schools (JHSs) from urban and rural areas. Administration of questionnaires and semi-structured interviews were used for the quantitative and qualitative data collection. The questionnaire has content and construct validities and is reliable. The interview schedule is credible and dependable. One finding suggests that most teachers in the research setting hold weak beliefs about inquiry teaching but strong beliefs about traditional instruction, that are negative indicators of inquiry-based science teaching. Other findings indicate that there are significant school type and academic qualification differences in teachers’ beliefs about inquiry-based science teaching. One implication of the findings is that currently most teachers in the study context do not hold strong positive beliefs necessary for the implementation of inquiry-based science curricula. It is recommended that regular inquiry-based in-service trainings be designed to improve teachers’ beliefs. It is also recommended that inquiry-based in-service trainings should be designed based on teachers’ school type and academic qualifications.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85074271","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
The Post-Pandemic Effects of Distance Education on Business Students: A Review of Expert Reports 大流行后远程教育对商科学生的影响:专家报告综述
Pub Date : 2022-02-12 DOI: 10.5430/wje.v12n1p34
H. Estelami, A. Bezzone
The period following the outbreak of the COVID-19 pandemic presented monumental challenges to education systems around the world. In the United States, the unique effects experienced by business students due to the rapid adoption of distance teaching methods resulted in significant changes in the students' learning environments. Using expert reports published in the media, this article systematically reviews the pattern of student experience cited by experts, and identifies six disruptive effects. Furthermore, the disruptive nature of the changes is contrasted with earlier historical contexts in which distance business education had been deployed to overcome societal challenges. The article concludes with a discussion of expected changes resulting from the massive deployment of distance education methods among business schools in the post-pandemic era.
2019冠状病毒病大流行爆发后的一段时间,给世界各地的教育系统带来了巨大挑战。在美国,由于远程教学方法的迅速采用,商科学生经历了独特的效果,导致学生的学习环境发生了重大变化。本文利用媒体上发表的专家报告,系统地回顾了专家引用的学生体验模式,并确定了六种破坏性影响。此外,这些变化的破坏性与早期的历史背景形成了对比,在早期的历史背景下,远程商业教育被用来克服社会挑战。文章最后讨论了后流行病时代商学院大规模部署远程教育方法所带来的预期变化。
{"title":"The Post-Pandemic Effects of Distance Education on Business Students: A Review of Expert Reports","authors":"H. Estelami, A. Bezzone","doi":"10.5430/wje.v12n1p34","DOIUrl":"https://doi.org/10.5430/wje.v12n1p34","url":null,"abstract":"The period following the outbreak of the COVID-19 pandemic presented monumental challenges to education systems around the world. In the United States, the unique effects experienced by business students due to the rapid adoption of distance teaching methods resulted in significant changes in the students' learning environments. Using expert reports published in the media, this article systematically reviews the pattern of student experience cited by experts, and identifies six disruptive effects. Furthermore, the disruptive nature of the changes is contrasted with earlier historical contexts in which distance business education had been deployed to overcome societal challenges. The article concludes with a discussion of expected changes resulting from the massive deployment of distance education methods among business schools in the post-pandemic era.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86420307","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: 1
Is Hammett Correlation of Dipole Moments of mono-Substituted Benzenes Helpful to Distinguish o,p-Directing Groups from m-Directing Groups in an Aromatic Electrophilic Substitution? A Chemical Education Perspective 单取代苯偶极矩的Hammett相关是否有助于区分芳香亲电取代中o,p-导向基和m-导向基?化学教育的视角
Pub Date : 2022-01-03 DOI: 10.12691/wjce-10-1-3
R. Sanjeev, D. A. Padmavathi, V. Jagannadham
In chemistry literature it is so far achieved to distinguish o,p-directing groups from m-directing groups purely on the basis of only relative yields of ortho, para and meta electrophilic substituted products in the benzene ring and it is also based on their ability to disturb the pi-electron density at the carbons. It is for the first time in chemistry literature using dipole moment data a linear free energy relationship (LFER), Hammett equation is used to distinguish o,p-directing groups from m-directing groups. This could be achieved by constructing Hammett plots with dipole moments versus Hammett σpara substituent constants for electron donating groups and Hammett σmeta substituent constants for electron withdrawing groups. Good straight lines are obtained with correlation coefficients close to 0.9 with certainly an unmistakable trend.
在化学文献中,迄今为止,仅根据苯环上邻位、对位和间位亲电取代产物的相对产率,以及它们干扰碳上pi电子密度的能力,就可以区分o、p导向基团和m导向基团。这是化学文献中首次利用偶极矩数据建立线性自由能关系(LFER),利用Hammett方程来区分o,p导向基团和m导向基团。这可以通过用偶极矩与给电子基的Hammett σ准取代基常数和吸电子基的Hammett σ元取代基常数建立Hammett图来实现。在相关系数接近0.9的情况下,可以得到很好的直线,这无疑是一个明确无误的趋势。
{"title":"Is Hammett Correlation of Dipole Moments of mono-Substituted Benzenes Helpful to Distinguish o,p-Directing Groups from m-Directing Groups in an Aromatic Electrophilic Substitution? A Chemical Education Perspective","authors":"R. Sanjeev, D. A. Padmavathi, V. Jagannadham","doi":"10.12691/wjce-10-1-3","DOIUrl":"https://doi.org/10.12691/wjce-10-1-3","url":null,"abstract":"In chemistry literature it is so far achieved to distinguish o,p-directing groups from m-directing groups purely on the basis of only relative yields of ortho, para and meta electrophilic substituted products in the benzene ring and it is also based on their ability to disturb the pi-electron density at the carbons. It is for the first time in chemistry literature using dipole moment data a linear free energy relationship (LFER), Hammett equation is used to distinguish o,p-directing groups from m-directing groups. This could be achieved by constructing Hammett plots with dipole moments versus Hammett σpara substituent constants for electron donating groups and Hammett σmeta substituent constants for electron withdrawing groups. Good straight lines are obtained with correlation coefficients close to 0.9 with certainly an unmistakable trend.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86615672","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
Introducing NMR to Biomedical Laboratory Scientists through a Laboratory Exercise; Synthesis, Structure Determination and Quantization of Aspirin by Employing an 1H-NMR Bench Top Instrument 通过实验室练习向生物医学实验室科学家介绍核磁共振用1H-NMR台式仪器合成、结构测定及定量阿司匹林
Pub Date : 2021-12-22 DOI: 10.12691/wjce-10-1-2
Marit Kristin Leiren, S. Steinkopf
In this chemical education research study, NMR was introduced to a group of 3 students with minor chemistry background. A bench top NMR instrument was used to acquire the 1 H-NMR spectra. The 1 H-NMR spectra were used to monitor the synthesis of ASA and product purity. The spectrum of the product confirmed its formation, and the spectra of crude and final product allowed the students to observe the elimination of impurities upon recrystallization of the product. Further, the spectrum of the final product was used to quantify the yield through integration of the proton resonances. The use of integrals of the proton resonances for calculation of the yield of ASA is to our knowledge not described elsewhere in undergraduate experiments. A procedure for the synthesis, recording and processing of 1 H-NMR spectra, as well as calculation of the yield is reported. This procedure can be implemented by undergraduate or by high school students and might as well be useful for instructors who wants to introduce NMR spectroscopy early in the curriculum of Chemistry. By including an exercise like this, the students get hands on experience to employ advanced technology that might be commonly used in the future, also in Hospital laboratories. Furthermore, it is useful to introduce one of the most demanding and advanced methods in chemistry as early as possible in the curriculum in Chemistry to promote the chemistry career.
在这次化学教育研究中,NMR被引入到一组3名非化学背景的学生中。采用台式核磁共振仪采集了1h -NMR光谱。利用1h - nmr谱监测ASA的合成及产物纯度。产品的光谱证实了它的形成,而原油和最终产品的光谱让学生们观察到产品再结晶时杂质的消除。此外,通过质子共振的积分,最终产物的光谱被用来量化产率。利用质子共振积分来计算ASA的产率,据我们所知,在本科生实验中没有其他地方描述过。本文报道了氢核磁共振谱的合成、记录和处理以及产率的计算过程。这个程序可以由本科生或高中生实施,也可能对那些想在化学课程早期引入核磁共振波谱的教师有用。通过这样的练习,学生们获得了使用先进技术的经验,这些技术将来可能会在医院实验室中普遍使用。此外,在化学课程中尽早引入一种要求最高、最先进的化学方法,有助于促进化学事业的发展。
{"title":"Introducing NMR to Biomedical Laboratory Scientists through a Laboratory Exercise; Synthesis, Structure Determination and Quantization of Aspirin by Employing an 1H-NMR Bench Top Instrument","authors":"Marit Kristin Leiren, S. Steinkopf","doi":"10.12691/wjce-10-1-2","DOIUrl":"https://doi.org/10.12691/wjce-10-1-2","url":null,"abstract":"In this chemical education research study, NMR was introduced to a group of 3 students with minor chemistry background. A bench top NMR instrument was used to acquire the 1 H-NMR spectra. The 1 H-NMR spectra were used to monitor the synthesis of ASA and product purity. The spectrum of the product confirmed its formation, and the spectra of crude and final product allowed the students to observe the elimination of impurities upon recrystallization of the product. Further, the spectrum of the final product was used to quantify the yield through integration of the proton resonances. The use of integrals of the proton resonances for calculation of the yield of ASA is to our knowledge not described elsewhere in undergraduate experiments. A procedure for the synthesis, recording and processing of 1 H-NMR spectra, as well as calculation of the yield is reported. This procedure can be implemented by undergraduate or by high school students and might as well be useful for instructors who wants to introduce NMR spectroscopy early in the curriculum of Chemistry. By including an exercise like this, the students get hands on experience to employ advanced technology that might be commonly used in the future, also in Hospital laboratories. Furthermore, it is useful to introduce one of the most demanding and advanced methods in chemistry as early as possible in the curriculum in Chemistry to promote the chemistry career.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"8 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83605939","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
Level of Knowledge of Agricultural Science Graduate Students about Climate Change Mitigation and Adaptation Practices of Agriculture 农业科学研究生关于减缓气候变化与农业适应实践的知识水平
Pub Date : 2021-12-20 DOI: 10.5430/wje.v11n6p50
N. M. Gazzaz, M. Al-Masad
Climate change (CC) is a global environmental problem and source of concern. Effective planning and implementation of CC mitigation and adaptation may arise from knowledge of its causes and effects. Therefore, dissemination of knowledge is highly important for ensuring that the knowledge grows and spreads amongst the various stakeholders and that it is turned into action. The students of today are the leaders and policy makers of tomorrow. They will effectively serve as change agents once their knowledge base has been well established. This study provides analysis of graduate students' level of knowledge of CC, its nature, causes, effects, mitigation, and adaptation. The study population was 57 agricultural science master's students in the Faculty of Agricultural Sciences in Jarash University, Jordan, and the sample consisted of 50 of those students. The study used online test as the knowledge assessment and data collection tool. Frequency distribution analysis uncovered that the sample students possess high level of general knowledge of CC, moderate level of knowledge of mitigation of CC, and high level of knowledge of adaptation to CC. As to the three investigated facets of general knowledge of CC, these students have high levels of knowledge of the nature and the effects of CC and moderate level of knowledge of its causes. These findings contribute to understanding of students' knowledge achievements and gaps and of the need for curricular reform in terms of structure and content that can be shared by agricultural science faculties around the World with similar CC graduate programs.
气候变化是一个全球性的环境问题,引起了人们的广泛关注。了解气候变化的原因和影响,就可以有效地规划和实施减缓和适应气候变化的工作。因此,知识的传播对于确保知识在各个利益相关者之间增长和传播并将其转化为行动非常重要。今天的学生是明天的领导者和决策者。一旦他们的知识库得到很好的建立,他们将有效地充当变革推动者。本研究分析了研究生对气候变化、气候变化的性质、原因、影响、减缓和适应的认识水平。研究人群为约旦贾拉什大学农业科学学院57名农业科学硕士研究生,样本由其中50名学生组成。本研究采用在线测试作为知识评估和数据收集工具。频率分布分析发现,样本学生对CC的一般知识水平较高,对CC的缓解知识水平中等,对CC的适应知识水平较高。在CC的一般知识调查的三个方面,这些学生对CC的性质和影响知识水平较高,对CC的原因知识水平中等。这些发现有助于理解学生的知识成就和差距,以及在结构和内容方面进行课程改革的必要性,可以为世界各地具有类似CC研究生课程的农业科学学院所共享。
{"title":"Level of Knowledge of Agricultural Science Graduate Students about Climate Change Mitigation and Adaptation Practices of Agriculture","authors":"N. M. Gazzaz, M. Al-Masad","doi":"10.5430/wje.v11n6p50","DOIUrl":"https://doi.org/10.5430/wje.v11n6p50","url":null,"abstract":"Climate change (CC) is a global environmental problem and source of concern. Effective planning and implementation of CC mitigation and adaptation may arise from knowledge of its causes and effects. Therefore, dissemination of knowledge is highly important for ensuring that the knowledge grows and spreads amongst the various stakeholders and that it is turned into action. The students of today are the leaders and policy makers of tomorrow. They will effectively serve as change agents once their knowledge base has been well established. This study provides analysis of graduate students' level of knowledge of CC, its nature, causes, effects, mitigation, and adaptation. The study population was 57 agricultural science master's students in the Faculty of Agricultural Sciences in Jarash University, Jordan, and the sample consisted of 50 of those students. The study used online test as the knowledge assessment and data collection tool. Frequency distribution analysis uncovered that the sample students possess high level of general knowledge of CC, moderate level of knowledge of mitigation of CC, and high level of knowledge of adaptation to CC. As to the three investigated facets of general knowledge of CC, these students have high levels of knowledge of the nature and the effects of CC and moderate level of knowledge of its causes. These findings contribute to understanding of students' knowledge achievements and gaps and of the need for curricular reform in terms of structure and content that can be shared by agricultural science faculties around the World with similar CC graduate programs.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78534177","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
The Effect of Building Closures due to COVID 19 on the Perceptions and Practices of School Counselors COVID - 19导致的建筑物关闭对学校辅导员的认知和实践的影响
Pub Date : 2021-12-12 DOI: 10.5430/wje.v11n6p1
L. Nadelson, V. Couture, Odunola Oyeniyi
With school buildings shuttering due to COVID-19, school counselors’ work needed to shift to virtual environments. The shift in operations led us to wonder about school counselors’ perceptions and practices in these new and unfamiliar conditions. In our mixed-methods cross-sectional study, we gathered quantitative and qualitative data from 89 school counselors. Our findings include evidence of the counselors feeling disconnected from their students, lack of technology and student access, privacy issues, limited preparation to counsel in virtual environments, and work and life balance. We follow our results with a discussion, related implications, and directions for future research.
随着新冠肺炎疫情导致校舍关闭,学校辅导员的工作需要转移到虚拟环境中。这种运作方式的转变让我们对学校辅导员在这些陌生的新环境中的看法和做法感到好奇。在我们的混合方法横断面研究中,我们收集了89名学校辅导员的定量和定性数据。我们的发现包括辅导员感觉与学生脱节的证据,缺乏技术和学生接触,隐私问题,在虚拟环境中咨询的准备有限,以及工作和生活的平衡。我们在结果之后进行了讨论,相关的含义和未来的研究方向。
{"title":"The Effect of Building Closures due to COVID 19 on the Perceptions and Practices of School Counselors","authors":"L. Nadelson, V. Couture, Odunola Oyeniyi","doi":"10.5430/wje.v11n6p1","DOIUrl":"https://doi.org/10.5430/wje.v11n6p1","url":null,"abstract":"With school buildings shuttering due to COVID-19, school counselors’ work needed to shift to virtual environments. The shift in operations led us to wonder about school counselors’ perceptions and practices in these new and unfamiliar conditions. In our mixed-methods cross-sectional study, we gathered quantitative and qualitative data from 89 school counselors. Our findings include evidence of the counselors feeling disconnected from their students, lack of technology and student access, privacy issues, limited preparation to counsel in virtual environments, and work and life balance. We follow our results with a discussion, related implications, and directions for future research.","PeriodicalId":23766,"journal":{"name":"World Journal of Chemical Education","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80988141","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
期刊
World Journal of Chemical Education
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1