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Antioxidant Capacity of "Rhizophora Mangle" Bark Extracts: A Contextualized Approach in the Teaching of Analytical Chemistry
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Bruna M. Damm; Izabela de F. Schaffel; Gabriel F. S. dos Santos; Lilia E. S. Azevedo; Rafael de Q. Ferreira; Paulo R. G. de Moura – Journal of Chemical Education, 2023
Antioxidants are molecules that act against free radicals, and this effect can bring many benefits to health and society. Antioxidants can be found in various matrices of nature, such as fruits and plants. Some studies have shown that "Rhizophora mangle," a typical mangrove plant, is rich in antioxidants. People report its use for…
Descriptors: Chemistry, Science Instruction, Scientific Concepts, Plants (Botany)
Cockroaches: An Alternative Model to Teach Enzymatic Inhibition to Undergraduate Students
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Schmitz, Gabriela L.; Nogara, Pablo A.; Medina, Natiéle; da Rocha, João Batista T.; Vargas Barbosa, Nilda; Segatto, Ana Lúcia A.; Oliveira, Cláudia S. – Journal of Biological Education, 2022
Enzymes are organic molecules known for their catalytic nature because they accelerate metabolic reactions in organisms. The study of enzyme functions and modes of action is essential to understand Biochemistry. This study aimed to analyse the acetylcholinesterase enzymatic activity, as well as the enzymatic inhibition mechanism in practical…
Descriptors: Science Instruction, Metabolism, Biochemistry, Scientific Concepts
STR120: A Web-Based Board Game for Aiding Students in Review of the Structural Theory of Organic Compounds
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Jose´ Nunes da Silva Ju´nior; Jean-Yves Winum; Andrea Basso; Luca Gelati; Lisa Moni; Antonio Jose´ Melo Leite Junior; Jair Mafezoli; Da´vila Zampieri; Francisco Serra Oliveira Alexandre; Kimberly Benedetti Veja; Andre´ Jalles Monteiro – Journal of Chemical Education, 2022
This paper provides information about a multilingual (Portuguese, English, Spanish, Italian, and French) virtual card game for computers and smartphones. Facing the disruption caused by the COVID-19 pandemic, this game allows students to play remotely or face-to-face with friends in a fun and cooperative environment and review the topics related…
Descriptors: Organic Chemistry, Scientific Concepts, Educational Games, Video Games
Using a Sequence of Experiments with Turmeric Pigments from Food to Teach Extraction, Distillation, and Thin-Layer Chromatography to Introductory Organic Chemistry Students
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da S. F. Fagundes, Thayssa; Dutra, Karen Danielle B.; Ribeiro, Carlos Magno R.; de A. Epifanio, Rosa^ngela; Valverde, Alessandra L. – Journal of Chemical Education, 2016
This experiment encourages students to use deductive reasoning skills to understand the correlation between different techniques used in a chemistry laboratory and to extract and analyze curcuminoids using natural products and processed food from a grocery store. Turmeric pigments were used to teach continuous or discontinuous extraction, vacuum…
Descriptors: Science Instruction, Science Experiments, Science Laboratories, Laboratory Experiments
Have Biofuel, Will Travel: A Colorful Experiment and a Different Approach to Teach the Undergraduate Laboratory
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El Seoud, Omar A.; Loffredo, Carina; Galgano, Paula D.; Sato, Bruno M.; Reichardt, Christian – Journal of Chemical Education, 2011
The substitution of petroleum-based fuels with those from renewable sources has gained momentum worldwide. A UV-vis experiment for the quantitative analysis of biofuels (bioethanol or biodiesel) in (petroleum-based) diesel oil has been developed. Before the experiment, students were given a quiz on biofuels, and then they were asked to suggest a…
Descriptors: Fuels, Science Instruction, Science Experiments, Laboratory Experiments
The Contribution of History to Engineering Education.
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Barboza, Christina Helena – 1998
This paper intends to bring out the experience of introducing a discipline of History of Science and Technology in an Undergraduate Course of Engineering and a proposal of transforming it so as to help future engineers deal with the challenges posed by the present moment of capitalism, usually called globalization. The discipline was lectured at…
Descriptors: Engineering Education, Foreign Countries, Higher Education, History