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Enhancing the Microscopy Skills of Non-Science Majors and Nursing Microbiology Students: Promoting the Practice of Observing Multiple Fields of View Using Blood Smear Slides 提高非理科生和护理微生物学学生的显微技术:促进用血液涂片观察多视场的实践
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.32
Brian M. Forster, A. Pacitti
One of the challenges in teaching microscopy is having students scan multiple fields of view at high power magnification. Many times, students will feel this unnecessary, especially when presented with slides that show only one structure or a monoculture of cells. This communication presents a simple microscopy activity to engage students in the importance of examining several fields of view when using the microscope. Students are challenged with determining whether an “unknown” blood smear slide is indicative of normal blood or a blood disorder. The disorders the activity examines include sickle cell anemia, leukemia, thrombocytosis and a bloodstream infection. All slides can be purchased from science education supply companies. Students must properly focus on commercially available blood slides and examine several fields of view in order to reach the most reasonable diagnosis. This lesson has been used to engage both non-science majors taking a laboratory-based science class as well as nursing/allied health microbiology students and simulates real-life scenarios in
显微镜教学的挑战之一是让学生在高倍放大镜下扫描多个视场。很多时候,学生会觉得这是不必要的,特别是当幻灯片只显示一个结构或单一培养的细胞时。这个交流提出了一个简单的显微镜活动,让学生在使用显微镜时检查几个视野的重要性。学生们面临的挑战是确定“未知”的血液涂片片是正常血液还是血液疾病的指示。该活动检查的疾病包括镰状细胞性贫血、白血病、血小板增多症和血液感染。所有的幻灯片都可以从科教用品公司购买。学生必须适当地关注市售的血液玻片,并检查几个视野,以达到最合理的诊断。本课程已被用于吸引非科学专业的学生参加以实验室为基础的科学课程,以及护理/相关健康微生物学学生,并模拟了现实生活中的场景
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引用次数: 0
An Interactive Protocol for In-Classroom DNA Extraction 课堂DNA提取的交互式协议
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.37
Danica C. Levesque, Athena L. Wallis, Jenna Daypuk, Jesse Petahtegoose, Mitchell Slobodian, Allie K. Sutherland-Hutchings, Ian Black, Jessica M. Vélez, Abdullah Abood, Marah H. Wahbeh, Romina B. Cejas, Angel F. Cisneros, Laerie McNeil, Kento Konno, Lissa McGregor, Birha Faroqi, Carla Bautisa, Subhash Rajpurohit, Divita Garg, Jiechun Zhu, Guangdong Yang, Solomon Arthur, Thomas J. S. Merritt
Using commonly available materials, this tool allows students to extract DNA, exploring DNA chemistry and the principles of experimental design and execution. We take a “Choose Your Own Adventure” approach encouraging students to explore the protocol and vary individual steps. Students learn the science behind each step of extraction, how that science can allow us to identify and understand certain aspects of the structure of DNA, and how modifying experimental steps can change the observed results. The lesson is intended for an undergraduate setting, but we include adaptations to allow delivery of this lesson to a variety of ages from preschool through adult science events. The manuscript is in English, but we have included supporting materials in Anishinaabemowin, French, Spanish, Urdu, Arabic, Japanese, Mandarin, Hindi, Twi, and English, so that more learners can access these materials in their first language. We have included a supplemental figure showing the simplified structure of DNA using a color scheme that is effective with those with typical sight and colorblindness. We have also linked a video demonstration of the extraction that is available in both French and English and with closed captioning. Inclusion of materials in multiple languages and formats makes the material more user-friendly, allowing its direct inclusion in non-English speaking classrooms, and allows learners to understand that science is not limited to the “universal” scientific language and can be conducted in any language of choice. Primary Image: This image highlights the basic steps of the extraction process, showing the experimental setup, the DNA precipitation, the product and variation observed amongst different group members.
使用常用的材料,这个工具允许学生提取DNA,探索DNA化学和实验设计和执行的原则。我们采取“选择你自己的冒险”。方法鼓励学生探索协议和不同的个人步骤。学生们将学习萃取每一步背后的科学,科学如何让我们识别和理解DNA结构的某些方面,以及修改实验步骤如何改变观察结果。本课程的目的是为本科生设置,但我们包括适应,以允许本课程的各种年龄,从学龄前到成人科学事件交付。手稿是英文的,但我们也加入了阿尼什纳阿贝莫文、法语、西班牙语、乌尔都语、阿拉伯语、日语、普通话、印地语、特维语和英语的辅助材料,以便更多的学习者可以用他们的母语访问这些材料。我们添加了一个补充图,显示了使用典型视力和色盲的人有效的配色方案简化的DNA结构。我们还链接了一个视频演示,该视频有法语和英语两种版本,并配有字幕。包含多种语言和格式的材料使材料更加用户友好,允许将其直接纳入非英语课堂,并使学习者了解科学并不局限于“普遍的”;科学的语言,可以用任何语言进行选择。主图:此图突出了提取过程的基本步骤,显示了实验设置,DNA沉淀,产物和不同组成员之间观察到的变化。
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引用次数: 0
A Simple Method for Predicting a Molecule's Biological Properties From Its Polarity 从极性预测分子生物学特性的一种简单方法
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.16
Gregory J. Crowther, Sasha D. Gradwell, T. Eckert
The distinction between very polar and less polar substances is a foundation of biochemistry, cell biology, and physiology; it surfaces in multiple concept inventories and elaborations of biological core concepts. However, in our experience, most biology courses do not explicitly teach students how to assess the polarity of any given molecule, thus limiting students’ ability to predict related biological properties such as the molecule’s solubility in bodily fluids, its rate of diffusion through cell membranes, the location of its receptors (at the cell surface or inside the cell), its rate of filtration by the kidneys, and the extent of its persistence in the blood. Here we present a quantitative yet student-friendly method for determining a molecule’s polarity according to the prevalence of polar functional groups. The method calculates a molecule’s “C/fun” ratio—the number of carbon atoms per polar functional group—which correlates closely with the logP value, a widely used indicator of polarity. In addition, the lesson incorporates the Test Question Templates (TQT) framework to provide transparent guidance to both instructors and students on formative and summative assessments of understanding. Our lesson stresses the connections between polarity and the above-mentioned biological properties to help students appreciate the biological utility of understanding polarity. Given its central position in biochemistry and cell biology, polarity might be considered a Threshold Concept, i.e., one that is troublesome (hard to understand), transformative (affecting scientific identity), integrative (connecting other concepts), and irreversible (hard to forget once mastered).
极极性物质和弱极性物质之间的区别是生物化学、细胞生物学和生理学的基础;它出现在多种概念清单和生物核心概念的阐述中。然而,根据我们的经验,大多数生物学课程并没有明确地教学生如何评估任何给定分子的极性,从而限制了学生预测相关生物学特性的能力,如分子在体液中的溶解度,其通过细胞膜的扩散速度,其受体的位置(在细胞表面或细胞内),其肾脏过滤的速度,以及其在血液中的持续程度。在这里,我们提出了一个定量的,但学生友好的方法来确定一个分子的极性根据极性官能团的流行。该方法计算分子的“C/fun”比率——每个极性官能团的碳原子数——它与logP值密切相关,logP值是一种广泛使用的极性指标。此外,课程还结合了测试问题模板(TQT)框架,为教师和学生提供关于形成性和总结性理解评估的透明指导。本课程强调极性与上述生物学特性之间的联系,以帮助学生了解极性在生物学上的用途。考虑到极性在生物化学和细胞生物学中的中心地位,极性可能被认为是一个门槛概念,即一个麻烦的(难以理解),变革的(影响科学身份),整合的(连接其他概念),和不可逆的(一旦掌握就很难忘记)。
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引用次数: 0
Debating Conservation: Developing Critical Thinking Skills in Introductory Biology Classes 辩论保护:在生物学导论课中培养批判性思维能力
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.1
Chloé Orland, Kimberly M. Ballare, A. Garcia-Vedrenne, Maura Palacios Mejia, R. Wayne, B. Shapiro
,
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引用次数: 1
Why Do I Need a Lab Notebook? Teaching Responsible Conduct of Research with CURE Lab Notebooks 为什么我需要一个实验笔记本?用CURE实验室笔记教学负责任的研究行为
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.31
Staci N Johnson
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引用次数: 0
Advancing Global Learning Through a Collaborative Online International Learning (COIL) Module on the United Nations Sustainable Development Goals (UN SDGs) 通过协作式在线国际学习(COIL)模块推进联合国可持续发展目标(UN SDGs)的全球学习
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.4
Cody S. Bekkering, Chongsheng Peng, Liyuan Tian
An increasingly interconnected world presents opportunities for globally relevant curricula in the classroom. Implementing collaborative online international learning (COIL) modules within medium-sized courses can take advantage of this interconnectedness to enhance student learning by integrating global issues and cultures into their curricula. Adoption of COIL in STEM courses is increasing but also encountering challenges related to language, course timing, learner culture, learning platforms, and instructor logistics. We present a successful implementation of a COIL lesson module that addresses these challenges. In this module, students from upper-division classes in the United States and China worked together to study medicinal plants in an eight-week group project anchored in the Unit ed Nations Sustainable Development Goals (UN SDGs). Students worked in groups across the classes to analyze a given medicinal plant in terms of its use, biological activities, cross-cultural perceptions, and connection to the UN SDGs. This synthesis was delivered in an electronic poster format to each class after the eight-week period. Students described significant personal gains from the COIL module including a broadened worldview, an inspiration to engage in more cross-cultural experiences, and a desire to learn more disciplinary knowledge about medicinal plants. Challenges encountered by students during the module included scheduling, online platform issues, and occasional language barriers. However, overcoming these challenges reinforced desired learning outcomes from the module and fostered transferable skills applicable to other intercultural experiences. These outcomes were captured by the positive responses to the post-module reflection and showcase the utility of adopting a similar COIL experience in other classrooms.
一个日益相互联系的世界为课堂上的全球相关课程提供了机会。在中等规模的课程中实施协作式在线国际学习(COIL)模块,可以利用这种相互联系,通过将全球问题和文化融入课程,提高学生的学习水平。在STEM课程中越来越多地采用COIL,但也遇到了与语言、课程时间、学习者文化、学习平台和教师后勤相关的挑战。我们提出了一个解决这些挑战的COIL课程模块的成功实现。在这个模块中,来自美国和中国高年级的学生在一个为期八周的小组项目中共同研究药用植物,该小组项目以联合国可持续发展目标(UN SDGs)为基础。学生们在课堂上分组工作,从药用植物的用途、生物活性、跨文化认知以及与联合国可持续发展目标的联系等方面分析给定的药用植物。八周后,这篇综合论文以电子海报的形式分发给每个班级。学生们描述了从COIL模块中获得的重大个人收益,包括开阔的世界观,参与更多跨文化体验的灵感,以及学习更多关于药用植物的学科知识的愿望。学生们在学习过程中遇到的挑战包括日程安排、在线平台问题以及偶尔的语言障碍。然而,克服这些挑战加强了期望的学习成果,并培养了适用于其他跨文化经验的可转移技能。这些成果反映在对模块后反思的积极反应中,并展示了在其他教室采用类似COIL体验的效用。
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引用次数: 0
Using Collaborative Projects to Promote Active Learning of Microbial Skin Diseases and Their Impact on Everyday Lives 利用合作项目促进微生物皮肤病及其对日常生活的影响的主动学习
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.20
J. Ebomoyi, N. Boury
One of the most daunting aspects of introductory clinical microbiology is learning details about a vast number of different microbial diseases that can infect humans. Each of these diseases has different causative agents, diagnostic procedures
入门临床微生物学最令人生畏的方面之一是学习大量不同微生物疾病的细节,这些疾病可以感染人类。每一种疾病都有不同的病原体和诊断程序
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引用次数: 0
Simulating Cortical Rotation, Axis Induction, and Experimental Embryology in Amphibian Embryos Using Clay Models 用粘土模型模拟两栖动物胚胎的皮质旋转、轴诱导和实验胚胎学
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.22
D. C. Spitzer
The study of development requires learners to understand spatially complex concepts like embryo anatomy. Embryo anatomy is dynamic over time, and it is often manipulated by researchers in experiments that are fundamental to the field. This spatial complexity can be challenging for novice developmental biologists, particularly those who are taught in lecture-only courses that rely heavily on two-dimensional representations of three-dimensional concepts. This article describes a hands-on teaching activity I used in an undergraduate developmental biology course to help students learn about early development in amphibians through the lens of experimental embryology. Students used modeling clay to construct a frog egg and simulate early developmental processes. Students then used the models to recreate the classical embryological experiments that demonstrated the inductive properties of the dorsal organizer and the requirement of cortical rotation for organizer establishment. As students performed the activity, they completed a worksheet to check their comprehension, particularly of concepts that students typically struggle to understand. Data from a survey and pre/post-assessments show evidence of learning gains and positive student perceptions of the lesson. This activity is a simple, inexpensive, and easily replicable way to include hands-on active learning in developmental biology courses and enable students to practice experimental thinking, even in courses without an associated lab
发展的研究要求学习者理解空间复杂的概念,如胚胎解剖。随着时间的推移,胚胎解剖是动态的,它经常被研究人员在该领域的基础实验中操纵。这种空间复杂性对发育生物学家新手来说可能是一个挑战,特别是那些只在课堂上授课的人,这些课程严重依赖于三维概念的二维表示。本文描述了我在本科发育生物学课程中使用的实践教学活动,通过实验胚胎学的视角帮助学生了解两栖动物的早期发育。学生们用粘土模型制作青蛙蛋,模拟青蛙早期发育过程。然后,学生们用这些模型重现了经典的胚胎学实验,证明了背侧组织体的归纳特性和组织体建立需要皮层旋转。当学生们进行活动时,他们完成了一份工作表来检查他们的理解能力,特别是对学生通常难以理解的概念的理解。来自调查和前后评估的数据显示了学习成果和学生对课程的积极看法的证据。这个活动是一种简单、廉价、容易复制的方式,它将动手主动学习纳入到发育生物学课程中,使学生能够练习实验思维,即使在没有相关实验室的课程中也是如此
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引用次数: 0
Fragile States: A Case Study Exploring Genetics, Molecular Biology, and Biochemistry Through the Lens of Fragile X Syndrome 脆弱状态:通过脆性X综合征探索遗传学、分子生物学和生物化学的案例研究
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.33
A. T. Hark, Lauren E. Washco
This case aims to strengthen students’ understanding of molecular biology concepts through study of Fragile X Syndrome (FXS). Students begin by learning the cause and phenotypes of FXS and related conditions. Students then apply genetics knowledge to describe the inheritance of FXS. Knowledge of the central dogma of molecular biology helps students understand the impact of genetic and epigenetic changes on expression of the Fragile X mental retardation gene 1 and the impacts of the loss of the Fragile X Mental Retardation Protein on other protein production. As one example of the latter, students look at alterations in metabolic enzymes and consider ways to mitigate the phenotype, proposing treatments for FXS. Throughout the case, students are pointed to a clinical website and scientific literature to build their understanding. This case study also engages students in consideration of diversity and inclusion in conveying, interpreting, and acting on scientific information. Overall, this case can help students connect biological concepts to a real-world application while developing their abilities to think critically and comprehend scientific information.
本案例旨在通过对脆性X综合征(Fragile X Syndrome, FXS)的学习,加强学生对分子生物学概念的理解。学生从学习FXS的原因和表型以及相关条件开始。然后学生们运用遗传学知识来描述FXS的遗传。了解分子生物学的中心法则有助于学生理解遗传和表观遗传变化对脆性X智力发育迟滞基因1表达的影响,以及脆性X智力发育迟滞蛋白的缺失对其他蛋白质产生的影响。作为后者的一个例子,学生们观察代谢酶的变化,并考虑减轻表型的方法,提出治疗FXS的方法。在整个案例中,学生们被指向一个临床网站和科学文献,以建立他们的理解。这个案例研究也让学生思考在传达、解释和运用科学信息时的多样性和包容性。总的来说,这个案例可以帮助学生将生物学概念与现实世界的应用联系起来,同时培养他们批判性思考和理解科学信息的能力。
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引用次数: 0
Sanger Sequencing by Hand: Using Paper Clips to Demonstrate Chain Termination 桑格测序手:使用回形针演示链终止
Pub Date : 2023-01-01 DOI: 10.24918/cs.2023.7
C. E. Smith, Chrystal Ho Pao
Sanger sequencing is commonly taught with a hands-on approach. Sanger sequencing involves chain termination by dideoxynucleotides, because they are missing the oxygen on the 3’ carbon atom, which is required for the addition of subsequent nucleotides. This is a first-generation sequencing method, but it is still relevant to genetics today. It is also simpler than next-generation sequencing. Therefore, Sanger sequencing is a helpful introduction to sequencing techniques for students. The concept of chain termination can be visualized in a variety of ways using different objects, such as candy or cut pieces of paper
桑格测序通常是用动手的方法来教授的。桑格测序涉及到双脱氧核苷酸的链终止,因为它们缺少3 '碳原子上的氧,而这是后续核苷酸添加所必需的。这是第一代测序方法,但它仍然与今天的遗传学相关。它也比下一代测序更简单。因此,桑格测序是一个有用的介绍测序技术的学生。链终止的概念可以用不同的物体以各种方式可视化,比如糖果或剪纸
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引用次数: 0
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