USP 751 is a pharmaceutical test designed to limit to an unobjectionable level the number and size of discrete metal particles that may occur in ophthalmic ointments. This test requires a very specific microscope system. Learn more about it here.
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Images of spirogyra captured under the microscope at 100x.
Different types of microscopes use different techniques to create images. These include light microscopes, confocal microscopes, electron microscopes, and x-ray microscopes. Learn the differences between these microscopes and which microscope is used for different applications.