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  • Correlative In-Resin Super-Resolution and Electron Microscopy Using Standard Fluorescent Proteins

    We introduce a method for correlative in-resin super-resolution fluorescence and electron microscopy (EM) of biological structures in mammalian culture cells. Cryo-fixed resin embedded samples offer superior structural preservation, performing in-resin super-resolution, however, remains a challenge.
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  • Immersion Freezing for Cryo-Transmission Electron Microscopy: Fundamentals

    The high vacuum required in a transmission electron microscope (TEM) greatly impairs the ability to study specimens naturally occurring in an aqueous phase: exposing "wet" specimens to a pressure significantly lower than the vapour pressure of water will lead to the water phase boiling off rapidly in the column, with devastating consequences for the structure of the specimen. Hence, various methods to dry specimens before inspection are employed in conventional TEM – a preparative step often associated with artifacts limiting the significance of the results.
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  • Freeze Substitution of Trypanosoma brucei

    Chemical fixation of biological specimens for ultrastructural investigation is a relatively slow and selective process, and therefore a common source of artifacts. Freezing, on the other hand, is an excellent method to physically fix biological specimens in their entirety and without delay; the formation of ice crystals large enough to displace cellular material and destroy structures, would be, however, a major issue.
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  • Brief Introduction to High-Pressure Freezing

    Water is the most abundant cellular constituent and therefore important for preserving cellular ultra-structure. Currently the only way to fix cellular constituents without introducing significant structural alterations is by cryo-fixation. There are currently two common methods employed; plunge freezing and high pressure freezing.
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