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2. Electron Microscopy.

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Presentation on theme: "2. Electron Microscopy."— Presentation transcript:

1 2. Electron Microscopy

2 A. Transmission electron Microscopy (TEM)

3 LM vs. TEM

4 TEM Fixatives:

5 3-D reconstruction of a mitochondrion from TEM sections

6 Immunogold localization (TEM)

7 Replica technique for surfaces

8 TEM of replica of freeze-fractured chloroplast

9 TEM of negatively stained actin filaments
(Uranium acetate)

10 B. Scanning Electron Microscopy

11 SEM DIC TEM

12 Radioisotope labeling

13 Radioisotopically labeled molecules

14 EM Autoradiography Labeled Pancreatic beta Insulin: cells pulsed w 3H-leucine for ’ 5 min, followed grains over by 10’ and 45’ Golgi app. chase. Sections coated w photo emulsion and ’ exposed in dark Grains over Grains secretory developed and granuled photographed in TEM


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