Investigation of resins suitable for the preparation of biological sample for 3-D electron microscopy.

Details

Serval ID
serval:BIB_EDCB3874D5CA
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Investigation of resins suitable for the preparation of biological sample for 3-D electron microscopy.
Journal
Journal of Structural Biology
Author(s)
Kizilyaprak C., Longo G., Daraspe J., Humbel B.M.
ISSN
1095-8657 (Electronic)
ISSN-L
1047-8477
Publication state
Published
Issued date
2015
Peer-reviewed
Oui
Volume
189
Number
2
Pages
135-146
Language
english
Notes
Publication types: Journal Article Publication Status: ppublish
Abstract
In the last two decades, the third-dimension has become a focus of attention in electron microscopy to better understand the interactions within subcellular compartments. Initially, transmission electron tomography (TEM tomography) was introduced to image the cell volume in semi-thin sections (∼500nm). With the introduction of the focused ion beam scanning electron microscope, a new tool, FIB-SEM tomography, became available to image much larger volumes. During TEM tomography and FIB-SEM tomography, the resin section is exposed to a high electron/ion dose such that the stability of the resin embedded biological sample becomes an important issue. The shrinkage of a resin section in each dimension, especially in depth, is a well-known phenomenon. To ensure the dimensional integrity of the final volume of the cell, it is important to assess the properties of the different resins and determine the formulation which has the best stability in the electron/ion beam. Here, eight different resin formulations were examined. The effects of radiation damage were evaluated after different times of TEM irradiation. To get additional information on mass-loss and the physical properties of the resins (stiffness and adhesion), the topography of the irradiated areas was analysed with atomic force microscopy (AFM). Further, the behaviour of the resins was analysed after ion milling of the surface of the sample with different ion currents. In conclusion, two resin formulations, Hard Plus and the mixture of Durcupan/Epon, emerged that were considerably less affected and reasonably stable in the electron/ion beam and thus suitable for the 3-D investigation of biological samples.
Pubmed
Web of science
Create date
13/02/2015 18:22
Last modification date
20/08/2019 17:15
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