Resolution of a gold latensification-elon ascorbic acid developer for Ilford L4 emulsion

Area of Science:

• Electron microscopy
• Autoradiography
• Materials science

Background:

• Quantitative electron-microscopical autoradiography requires high resolution.
• Ilford L4 emulsion is a common choice for autoradiography.
• Gold latensification-elon ascorbic acid (GEA) developer is known for its efficiency.

Purpose of the Study:

• To experimentally determine the autoradiographical resolution of the GEA developer for Ilford L4 emulsion.
• To evaluate the suitability of the L4-GEA combination for quantitative electron-microscopical autoradiography.

Main Methods:

• Used radioactive line sources of tritiated albumin to measure resolution.
• Employed thin sections (62 nm) with carbon layers and L4 silver bromide crystals.
• Measured the half-distance (HD) of resolution.

Main Results:

• Achieved a measured half-distance (HD) of resolution of 115 nm.
• Demonstrated high efficiency of the GEA developer for L4 emulsion.
• Observed excellent visibility of cellular structures around small silver grains.

Conclusions:

• The L4-GEA combination offers improved resolution for electron-microscopical autoradiography.
• The method is suitable for quantitative analysis due to high resolution and visibility.
• The L4-GEA combination is a preferred method for quantitative electron-microscopical autoradiography.