Microscopic examination
The analysis of minute organisms, cellular organization of any biological structure, and composition of body fluids with the help of a microscope is known as microscopic examination. The magnification of specimens or samples under study helps in attaining a clearer picture of it.
Gram Staining
Named after Hans Christian Gram, a Danish bacteriologist, Gram stain is one of the most powerful staining techniques within microbiology. This technique was introduced in 1882 to identify pneumonia-causing organisms. The Gram staining technique uses crystal violet or methylene blue as primary staining colors to distinguish gram-positive from gram-negative organisms. Under a microscope, the gram-positive organisms appear purple-brown, retaining the primary color. Gram-negative organisms appear pink or red as they do not acquire the color of the primary stain.
There are two ocular lenses on the microscope. In one lens there is a__________________ . In the other lens, there is a__________________.
A microscope is an instrument that helps in observing objects that cannot be seen with naked eyes. Microscopes can be of many types depending basically on the type of illumination used like light, and electrons. The object in a light microscope can be visualized directly through a setup of lenses but in electron microscope, the image produced through computer software is observed and the observer cannot directly observe the object.
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