Unformatted text preview: 7. Characteristics for Stained Characteristics for Non-stained • Has a cell wall (crystal violet) • Organelles that are difficult to see • Transparent • Small microorganisms • Live organisms when observing behavior • Larger microorganisms with color and contrast 8. OD Measurements Direct Counts • More accurate • More convenient • More time efficient • Saves time, therefore more cost efficient • Reduces strain on eyes from looking through a microscope • Less Error due to human mistakes • More accurate estimate when counting a homogenous mixture • Cheaper to stain and count than to spend money on spectrophotometers • Less error due to dirty cuvettes and dirt reflecting light...
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This note was uploaded on 10/12/2008 for the course BIO 205L taught by Professor Hanson during the Fall '07 term at University of Texas.
- Fall '07