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Ângelo Luís; Fernanda Domingues – Biochemistry and Molecular Biology Education, 2025
Bacteria have developed a cell-to-cell communication system called quorum sensing (QS), allowing them to regulate group behavior and synchronize the expression of virulence factors, responsible for increasing their infection capacity and resistance to antimicrobials. Although the control of microbial infections through the inhibition of microbial…
Descriptors: Inhibition, Evaluation Methods, Science Experiments, Microbiology
Yan Wang; Jinling Geng; Zhiwei Zhu – Journal of Chemical Education, 2024
This paper outlines a comprehensive teaching laboratory course program that centers on titration analysis, a timeless and essential technique in analytical chemistry spanning various disciplines, such as environmental science, medicine, and industry. In these fields, titration analysis is paramount for determining the concentrations of substances…
Descriptors: Undergraduate Students, Chemistry, Science Instruction, Laboratory Experiments
Nicola´s Andre´s Saffioti; Carla Angelani; Jose´ Mari´a Delfino; Silvia Ferna´ndez Villamil; Gabriela Elena Go´mez; Irene Mangialavori; Mari´a Florencia Pignataro; Pablo Julio Schwarzbaum – Journal of Chemical Education, 2023
Metabolic Control Analysis (MCA) is a systems biology approach that measures the control of a metabolic step on the overall flux of a metabolic pathway. In undergraduate courses in biochemistry, learning of MCA can be encouraged by experimental activities demonstrating practical applications of the MCA theory. In this work, we present a laboratory…
Descriptors: Biochemistry, Metabolism, College Science, Undergraduate Students
Christianson, Anna M.; Waters, Carolyn A. – Journal of Chemical Education, 2022
We describe a guided-inquiry laboratory experiment for instrumental analysis in which our students test an improved protocol for the recycling of silver chloride to produce nontoxic waste. Students are provided with samples of silver chloride that they created as waste products in a previous lab experiment and tasked with performing a stepwise…
Descriptors: Inquiry, Active Learning, Science Experiments, Laboratory Experiments
Molina, Isabel; Weber, Katrin; Alves Cursino dos Santos, Deborah Y.; Ohlrogge, John – Biochemistry and Molecular Biology Education, 2009
The introduction of dwarfing traits into crops was a major factor in increased grain yields during the "Green Revolution." In most cases those traits were the consequence of altered synthesis or response to the gibberellin (GA) plant hormones. Our current understanding of GA synthesis and physiology has been facilitated by the characterization of…
Descriptors: Laboratories, Science Experiments, Laboratory Procedures, Biochemistry
Li, Suxia; Wu, Haizhen; Zhao, Jian; Ou, Ling; Zhang, Yuanxing – Biochemistry and Molecular Biology Education, 2010
In an effort to achieve high success in knowledge and technique acquisition as a whole, a biochemistry and molecular biology experiment was established for high-grade biotechnology specialty students after they had studied essential theory and received proper technique training. The experiment was based on cloning and expression of alkaline…
Descriptors: Experimental Groups, Biotechnology, Molecular Biology, Biochemistry
Gilbert, Michael K.; Luttrell, Robert D.; Stout, David; Vogt, Frank – Journal of Chemical Education, 2008
Beer's law is an ideal technique that works only in certain situations. A method for dealing with more complex conditions needs to be integrated into the analytical chemistry curriculum. For that reason, the capabilities and limitations of two common chemometric algorithms, classical least squares (CLS) and principal component regression (PCR),…
Descriptors: Measurement Techniques, Chemistry, Least Squares Statistics, Science Curriculum
Carvalho-Knighton, Kathleen M.; Keen-Rocha, Linda – Journal of Chemical Education, 2007
The effectiveness of two different laboratory techniques is compared to teach students majoring in science in a general chemistry laboratory. The results demonstrated that student laboratory activities with computer-interface systems could improve student understanding.
Descriptors: Chemistry, Computer Assisted Instruction, College Science, Science Instruction

Gomes, M. Teresa S. R.; Oliveira, M. Manuela O.; Fonseca, M. Arminda; Oliveira, Joao A. B. P. – Journal of Chemical Education, 2004
Examination of the Faraday constant is conducted using a speedy electrolysis experiment. This cost-effective, easy and fast procedure makes it highly suitable for classroom applications.
Descriptors: Science Experiments, Chemistry, Laboratory Procedures, Evaluation Methods
Economou, A.; Tzanavaras, P. D.; Themelis, D. G. – Journal of Chemical Education, 2005
The sequential-injection analysis (SIA) is an approach to sample handling that enables the automation of manual wet-chemistry procedures in a rapid, precise and efficient manner. The experiments using SIA fits well in the course of Instrumental Chemical Analysis and especially in the section of Automatic Methods of analysis provided by chemistry…
Descriptors: Chemistry, Higher Education, College Science, Laboratory Procedures
Palombi, Peggy Shadduck; Jagger, Kathleen Snell – Bioscene: Journal of College Biology Teaching, 2008
Using cultured fibroblast cells, undergraduate students explore cell division and the responses of cultured cells to a variety of environmental changes. The students learn new research techniques and carry out a self-designed experiment. Through this project, students enhance their creative approach to scientific inquiry, learn time-management and…
Descriptors: Undergraduate Students, Student Attitudes, Cytology, Inquiry

Kuehl, Ernest; And Others – Physics Teacher, 1984
Content, readability, safety aspects, appearance, technique, effectiveness of experiments, enrichment exercises, teacher aids, and special features of 12 physics laboratory manuals are reported and compared. (JN)
Descriptors: Evaluation, High Schools, Laboratory Manuals, Laboratory Procedures
Blyth, Kristy M.; Mullings, Lindsay R.; Philips, David N.; Pritchard, David; van Bronswijk, Wilhelm – Journal of Chemical Education, 2005
The chemical and instrumental methods used in the study of transition-metal complexes provide a complete determination of their structure, bonding, and properties. It unites concepts of analytical, inorganic, and physical chemistry in a way that students might appreciate that these areas of chemistry are not different.
Descriptors: Holistic Approach, Chemistry, Science Education, Science Instruction