RESULTS Results of the plate counts for the samples you worked with. Number of Colonies for Each Dilution Plated Time Sampled 10-3 10-4 10-5 10-6 10-7 10-8 10-9 TFTC3 TFTC2 TFTC 10:40 TNTC TNTC TNTC 2 80 TFTC INTC TNTC TNTC 60 87 TNTC TNTC TNTC TNTC TNTC TNTC ITNTC |TNTC TNTC 125 TNTC TNTC TNTC 164 |1:00 8. 1:20 TFTC 9. TFTC TFTC TFICA 11:40 12:00 TNTC TFTC 13 T+TC 3 Calculate the cfu/ml for each time sample you worked with in the space below and record those values in the table below.
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.
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