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15 Cards in this Set
- Front
- Back
Binary fission
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single cell divides into two identical cells.
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Mycelial Growth
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Standard Plate Count-Reflects # of Viable microbes & assumes that each bacterium grows into a single colony
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Mycelial Growth
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Plate count done by either pour or spread plate method
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Mycelial Growth
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filtration[ bacteria obtained on surface of a membrane filter and then transferred tol a cult. medium to grow and be counted
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Mycellial Growth
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MPN-most probable number- used for microbes that will grown in liquid medium. It is a statistical estimation.
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Mycellial growth
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Direct Microscopic Count- Microbes in a measured volume of a bacterial suspension are counted without the use of specially designed slide.
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Budding
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A sexual reprodujction beginning as a protuberance from the parent cell that grow to become a daughter cell. Release of an eneveloped virus through the plasma membrane of an animal cell.
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Growth Rates``
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Generation Time-The time required for a cell to divide (and its population to double).
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Growth Curve
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1. Lag Phase-Little or no change in # of cells, but metabolic activity is high.
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growth curve`
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2. Log phase-bacteria multiply at the fastest rate possible under the conditions provided.
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growth curve
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3. stationary phase- equilibrium between cell division and death.
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growth curve
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4. death phase- the # of deaths exceeds the # of new cells formed.
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Enumeration of cell number and culture mass-viable and total counts, turbidity
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Turbidity- Monitoring bacterial growth as bacteria multiply in a liq. medium the medium becomes turbid or cloudy with cells. Less light transmitted the more bacteria in the sample.
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Metabolic Activity
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Measure metabolic activity. acid production is used to determine amts. of vitamins eg; of metabolic test.
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Dry Weight
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Fungus is removed from the medium, filtered pand placed in weighing bottle, dried . In bacteria removed from centrifugation.
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