Laboratory Course Module
Laboratory Course Module - Related Videos
06:19
Decontamination for Laboratory Biosafety
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2023
Robert M. Rioux and Zhifeng Chen, Pennsylvania State University, University Park, PA Decontamination is essential for laboratory biosafety, as the accumulation of microbial contamination in the laboratory can lead to the transmission of disease. The degree of decontamination can be classified as either disinfection or sterilization. Disinfection aims to eliminate all pathogenic microorganisms, with the exception of bacterial spores on lab surfaces or equipment. Sterilization, on the other hand,...
08:00
Measuring Mass in the Laboratory
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2023
The analytical balance is the common piece of equipment in the scientific laboratory. These highly precise instruments can measure down to ten thousandths or even hundred thousandths of a gram. The triple beam balance is a type of scale that uses counterweights on a three rider beams to counterbalance the sample in the pan. On the other hand, modern analytical balances use a complex system of electronic sensors to accurately mass a substance. The analytical balance is so sensitive that it...
07:27
Making Solutions in the Laboratory
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2023
The ability to successfully make solutions is a basic laboratory skill performed in virtually all biological and chemical experiments. A solution is a homogenous mixture of solute dissolved in bulk liquid known as the solvent. Solutions can be described by their solute concentration, a measure of how much solute is present per unit of solution. In this video, a step-by-step procedure for how to make a water-based, or aqueous, solution for biological applications is presented. The video...
05:28
Guidelines in Case of a Laboratory Emergency
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2023
Robert M. Rioux & Zhifeng Chen, Pennsylvania State University, University Park, PA The most common laboratory emergencies include chemical spills, fire or explosion, electric shock, and personnel injuries. Most laboratory accidents occur due to poor planning or lack of attention. Therefore, it's always better to prevent accidents (being proactive) than having to take any actions during an emergency (being reactive). For example, always wear proper personal protective equipment (PPE) in the...
05:31
A Fluorescent Screening Assay for Identifying Modulators of GIRK Channels
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Cited by 7 •
2012
A real-time screening procedure for identifying drugs that interact with G protein-gated inward rectifier K+ (GIRK) channels is described. The assay utilizes membrane potential-sensitive fluorescent dyes to measure GIRK channel activity. This technique is adaptable for use on a number of cell lines.
FAQs
Controlled conditions make it easier to determine whether an observed result reflects the biochemical process being studied rather than an uncontrolled change in the experiment. Students learn to manage relevant variables, follow protocols consistently, document observations, and assess experimental reliability. This approach supports more defensible interpretations when examining enzyme activity, protein structure, or molecular interactions.
These principles connect laboratory actions to biochemical explanations. Measuring enzyme activity can link reaction behavior with experimental conditions, while examining protein structure or molecular interactions helps students relate samples and observations to molecular properties. Using these concepts as interpretive frameworks prevents data collection from becoming purely procedural and encourages students to explain evidence in biochemical terms.
Quantitative analysis converts observations into data that can be compared, evaluated, and interpreted systematically. Within a Laboratory Course Module, students record measurements, examine patterns, and use the results to judge whether the evidence supports the relevant biochemical concept. This process also helps reveal unexpected outcomes that may require troubleshooting or a closer review of experimental reliability.
A typical sequence begins with reviewing the scientific concept and protocol, followed by preparing samples, controlling experimental conditions, and carrying out the investigation. Students then record observations, use instrumentation when required, analyze quantitative results, and interpret the findings. The final stage involves communicating conclusions and considering sources of error, reliability, or unexpected behavior.
Sample preparation establishes the material that will be examined, while instrumentation provides measurements or observations needed for analysis. Both stages require careful adherence to the protocol because mistakes before or during measurement can affect later interpretation. Practicing these skills gives students experience connecting physical laboratory handling with quantitative biochemical evidence.
These modules are useful when learners need to practice applying biochemical methods before addressing more complex research questions. Their activities can support preparation for work involving biotechnology, medicine, and related life sciences by combining experimental procedures with data analysis and scientific communication. The structured format also gives students opportunities to evaluate reliability and troubleshoot results.
Unexpected results provide an opportunity to review the protocol, recorded observations, controlled conditions, sample preparation, and measurements obtained from instrumentation. Students can use that review to identify possible procedural or interpretive problems rather than treating the outcome as unusable. Troubleshooting in this way develops a more careful approach to evaluating evidence and communicating limitations.