Search results
The basic subcellular structures of an eukaryotic cell as seen by transmission electron microscopy (TEM). Try to identify the cell borders and nuclei. Switch between the grayscale and color images (see above) to help identify the following structures: Plasma Membranes (dark green) - portions visible in cells 1, 2 and 4
The TEM has revealed structures in cells that are not visible with the light microscope. SEMs are often used at lower magnifications (up to ×30,000). The limit of resolution of a SEM is lower...
Figure 01-01: Examples of the four different types of microscopy, imaging green algae cells (species unknown): brightfield light microscopy, fluorescence light microscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). An average algal cell is between 2 and 7 µm.
Three-dimensional views of the surfaces of cells and tissues are obtained by scanning electron microscopy. The shapes of isolated macromolecules that have been shadowed with a heavy metal or outlined by negative staining can also be readily determined by electron microscopy.
- Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts, Peter Walter
- 2002
- 2002
The transmission electron microscope (TEM) is used to examine thin slices or sections of cells or. tissues. . TEMs have a maximum magnification of around x1,000,000, but images can be enlarged...
The photo in (a) shows the tall cylindrical microscope, which has a binocular eyepiece near its base. The microscope stands on the bench and the images are displayed on computer screens beside it. The electron micrograph in (b) shows a roughly spherical cell with its darkly staining (electron-dense) nucleus toward the left.
People also ask
What cytoplasm is visible on a TEM micrograph?
What is a TEM cytoplasm?
How can electron microscopy determine a 3 dimensional view of a cell?
What can we see in a cell with a light microscope?
Can a sample be viewed using a transmission electron microscope?
How big is a cell in a microscope?
Image formation depends on differential scattering of electrons within the specimen, an effect that is proportional to the sizes of atomic nuclei in the specimen (Figure 7.1). Biological material mainly consists of atoms of low atomic number.
