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Steam sterilizing units designed for total inactivation of microorganisms that are or may be present on agar and/or other culture media. These units usually include a pressurized (1.5 kg/cm2-15 psi is typical) treatment chamber with electric heaters, a water circulation system for rapid cooling, and a compressor. Some units prepare the appropriate culture media from dehydrated culture media and water before sterilization. Agar culture media sterilization units are mainly used in clinical laboratories for culture media that do not contain compounds that are affected by heat.
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