Nucleolus medium

Fig. 10. Electron micrograph from a 300- xm neostriatal slice incubated for 2 hr before fixation. (Top) Electron micrograph shows a well-preserved neostriatal medium-sized cell and surrounding neurophil. N, nucleus No, nucleolus G, golgi M, mitochondria D and d, dendrite AX, axon. (Bottom left) An electron micrograph taken from the middle layer of the slice demonstrating well-preserved neurophil with many axo-spinous synapses and clear...

When cultured in a complete medium, the nucleolus of the HeLa cell appears as a single, spherical dense body. In contrast, small fragments of nucleoli are seen when cells are grown on a tissue culture medium... 

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