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A variant of a slam freezing device for electron microscopy
C Lemke1, M Schwerdtfeger, I Pöhlmann
1Friedrich Schiller University Jena, Institute of Anatomy, Germany.
Summary
A novel homemade slam freezing device enables reproducible cryopreservation of unfixed tissues and cell suspensions. This innovation ensures consistent sample integrity for biological research.
Area of Science:
- Biotechnology
- Histology
- Cryopreservation
Background:
- Reproducible freezing of biological samples is crucial for downstream analysis.
- Existing methods may not adequately preserve delicate tissues or cell suspensions.
Purpose of the Study:
- To develop and present a novel, homemade slam freezing device.
- To achieve reproducible cryopreservation of various unfixed biological samples.
Main Methods:
- Construction of a slam freezing device utilizing an aluminum socket, spring-loaded plunger, and electromagnet.
- Utilizing a sheet metal planchette to hold samples during the freezing process.
- Implementing an interrupted electrical contact system for plunger retraction.
Main Results:
- The device allows for reproducible freezing of both solid tissues and cell suspensions.
- Successful cryopreservation demonstrated for samples including blood and bone marrow.
- The design ensures specimen integrity upon freezing.
Conclusions:
- The homemade slam freezing device offers a reliable and reproducible method for cryopreservation.
- This apparatus is suitable for a wide range of unfixed biological samples, enhancing research capabilities.