Vacuum Sectioning
Vacuum Sectioning - Related Videos
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Source: Robert M. Rioux, Ajay Sathe & Zhifeng Chen, Pennsylvania State University, University Park, PA Vacuum is required for a number of laboratory procedures. This is most routinely achieved in the laboratory by the use of vacuum pumps. In addition to working at low pressures, vacuum pumps can also be used to enable rapid changing of the atmospheres in a reactor or flask by evacuation and backfilling.
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Inoculating a Bacterial Pathogen into Arabidopsis Leaves via Vacuum Infiltration
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Vibratome Sectioning of Whole Murine Kidney: A Technique to Generate Thin Sections of Murine Kidney
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In this video, we demonstrate the vibratome sectioning of a whole mouse kidney to obtain thin slices. These sliced tissue sections can be stored at low temperatures until further downstream analysis.
FAQs
Reduced pressure removes air from around the specimen and the sectioning system. This can improve contact among the sample, its support medium, and the cutting surface, helping the specimen remain positioned during slicing. Better contact and reduced movement may produce more regular section surfaces, which is particularly useful when delicate material is disrupted by conventional cutting.
Consistent contact helps the cutting surface interact with the specimen in a more controlled way. When air or movement interferes, sections may become irregular or the sample may sustain damage. Vacuum sectioning addresses these problems by limiting air around the cutting setup, supporting preparation of surfaces that are more suitable for later microscopic examination.
The technique is most relevant when conventional cutting produces irregular sections or damages delicate specimens. Its reduced-pressure environment can limit disruption during slicing and improve the relationship between the specimen and cutting system. This makes it a useful alternative for biological samples whose organization or material interfaces need to remain sufficiently intact for microscopy.
A basic workflow places the biological specimen within the sectioning system, establishes reduced pressure around the specimen and cutting components, and then produces thin sections through slicing. The resulting sections can be prepared for subsequent staining or imaging. The key procedural purpose of the vacuum step is to remove surrounding air and reduce movement during cutting.
Sections produced through this approach can support microscopic examination of tissue organization and cellular features. They may also reveal characteristics of interfaces between biological materials when those surfaces are preserved during preparation. After sectioning, staining and imaging allow researchers to compare visible structures across specimens or experimental conditions within a histology or microscopy workflow.
Researchers apply the method within histology and microscopy workflows when thin, well-prepared specimen surfaces are needed for observation. It can support analysis of tissue organization, cellular features, and material interfaces, while the sections may undergo staining, imaging, or comparative evaluation. Its value is greatest when preserving specimen condition during cutting affects the quality of interpretation.