Blue molybdenum oxides: a stain for light and electron microscopy

Area of Science:

• Biochemistry
• Cell Biology
• Histology

Background:

• Histological staining is crucial for visualizing cellular components.
• Molybdenum compounds have potential as staining agents.

Purpose of the Study:

• To prepare and evaluate blue molybdenum oxides as a stain for biological tissues.
• To assess the staining characteristics and electron opacity of these oxides.

Main Methods:

• Preparation of blue molybdenum oxides from aqueous phosphomolybdic acid solutions.
• Application of the stain to thin and semi-thin sections of fixed and embedded tissues.
• Microscopic examination for color and electron opacity.

Main Results:

• Blue molybdenum oxides produced a light blue color in stained tissues.
• High electron opacity was observed in mast cell granules, goblet cell secretions, and Drosophila salivary gland granules.
• The staining appears to correlate with polyhydroxylic components in certain cell structures.

Conclusions:

• Blue molybdenum oxides are effective stains for specific cellular components.
• The staining mechanism may involve interactions with polyhydroxylic groups.
• This method provides enhanced contrast for electron microscopy.