Knowledge of resin ultra-thin cutting blades

Resin ultra-thin sectioning is a technique used in microscopy to prepare very thin slices of biological samples for examination under an electron microscope. In this technique, the sample is first embedded in resin and then thin slices of the resin-embedded tissue are cut using an ultra-thin diamond knife. The slices obtained are usually very thin, ranging from 30 to 50 nanometers, and they are mounted on grids for subsequent imaging with the electron microscope.

One of the key features of this technique is the possibility of achieving high resolution images of biological samples, providing detailed information on structures and functions of cells and tissues. Resin ultra-thin sections allow for the study of the intricate details of cells, such as the subcellular organelles and molecular complexes, with a resolution that cannot be achieved with other techniques.

Another feature of this technique is the quality and durability of the samples obtained. The use of resin as an embedding material provides a stable support for the sample during sectioning, preventing damage to the structure of the biological sample. Additionally, these sections can be stored for long periods, allowing for future study and analysis.

To obtain high-quality resin ultra-thin sections, there are specific requirements that must be met. These include:

1. Proper fixation of the biological sample: The tissue must be properly fixed to preserve its structure and avoid post-fixation artifacts. The choice of fixative varies depending on the type of sample being studied.

2. Dehydration of the sample: The sample must be dehydrated to remove water and other solvents, so that the resin can penetrate the tissue properly.

3. Embedding in resin: The sample is then embedded in resin to provide a stable support for the sample. Resins used for this technique must be able to penetrate the tissue properly and harden quickly.

4. Sectioning with an ultra-thin diamond knife: The sections must be cut with an ultra-thin diamond knife to obtain the desired thickness.

5. Staining and mounting: The sections are then stained and mounted on grids for imaging.

Resin ultra-thin sectioning is a valuable technique in microscopy and has been widely used in the study of cell and tissue structures. Its high resolution and durability make it a preferred choice for researchers studying biological samples.