Class Iii Biosafety Cabinet
Class Iii Biosafety Cabinet - Related Videos
06:19
Decontamination for Laboratory Biosafety
0 Views •
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,...
05:48
Fume Hoods and Laminar Flow Cabinets
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2023
Robert M. Rioux & William A. Elliott, Pennsylvania State University, University Park, PA Fume hoods and laminar flow cabinets are engineering controls that operate under similar principles. Both use a constant flow of air to prevent contamination of the laboratory environment and its inhabitants. Fume hoods prevent hazardous substances from exiting the hood workspace, whereas laminar flow cabinets prevent contaminants from entering the cabinet workspace. Fume hoods are ventilation systems...
01:12
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
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2024
Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of the heart's...
11:13
Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 3. Aerobiology
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Cited by 9 •
2016
As high-consequence pathogens can potentially infect subjects through airborne particles, aerobiology has been increasingly applied in pathogenesis research and medical countermeasure development. We present a detailed visual demonstration of aerobiology procedures during an aerosol challenge in nonhuman primates in an animal biosafety level 4 maximum containment environment.
15:42
Visualizing Antigen Specific CD4+ T Cells using MHC Class II Tetramers
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Cited by 28 •
2009
This procedure demonstrates the purification and in vitro expansion of antigen specific CD4+ T cells from whole peripheral blood and their visualization using MHC class II tetramers. Tetramers permit the direct visualization of T cells with a single antigen specificity and defined MHC class II restriction.
FAQs
Negative pressure keeps airflow moving inward rather than outward through potential leakage points. This directional airflow supports containment by reducing the chance that contaminated air will escape into the laboratory. HEPA-filtered supply and exhaust air add another control layer, helping retain infectious aerosols while maintaining a protected workspace for immunology and infection procedures.
Attached glove ports allow operators to manipulate materials without opening the cabinet or directly entering the enclosed workspace. Because the cabinet remains gas-tight and totally enclosed, the gloves preserve separation between the worker and hazardous biological material. This arrangement supports controlled handling while maintaining containment during culture, diagnostic, and experimental activities.
Sealed pass-through chambers provide a controlled route for moving materials into the cabinet without broadly exposing the enclosed workspace to the surrounding laboratory. Their use supports the cabinet’s total-enclosure design and helps preserve containment during material transfer. This is especially relevant when infectious or potentially aerosol-transmitted agents are used in laboratory procedures.
The cabinet is particularly relevant when work involves highly infectious or potentially aerosol-transmitted agents and requires stringent containment. Its enclosed design addresses risks associated with infectious aerosols while also protecting samples from the surrounding environment. In infection research, that combination supports safer culture, diagnostic, and experimental procedures under rigorous biosafety controls.
Within immunology and infection research, these cabinets can support culture, diagnostic, and experimental procedures involving hazardous biological materials. The same containment features apply across these workflows: operators work through glove ports, air is filtered at supply and exhaust, and materials enter through sealed pass-through chambers. This makes the cabinet suitable for activities requiring tightly controlled handling conditions.
Stringent containment primarily reduces exposure risks while preserving a controlled environment for handling hazardous biological materials. By limiting escape of infectious aerosols and separating operators from the workspace, the cabinet helps researchers conduct sensitive procedures under consistent biosafety conditions. These controls support reliable studies in which containment is essential to the quality and security of experimental work.