Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
Binary fission
|
single cell divides into two identical cells.
|
|
|
Mycelial Growth
|
Standard Plate Count-Reflects # of Viable microbes & assumes that each bacterium grows into a single colony
|
|
|
Mycelial Growth
|
Plate count done by either pour or spread plate method
|
|
|
Mycelial Growth
|
filtration[ bacteria obtained on surface of a membrane filter and then transferred tol a cult. medium to grow and be counted
|
|
|
Mycellial Growth
|
MPN-most probable number- used for microbes that will grown in liquid medium. It is a statistical estimation.
|
|
|
Mycellial growth
|
Direct Microscopic Count- Microbes in a measured volume of a bacterial suspension are counted without the use of specially designed slide.
|
|
|
Budding
|
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.
|
|
|
Growth Rates``
|
Generation Time-The time required for a cell to divide (and its population to double).
|
|
|
Growth Curve
|
1. Lag Phase-Little or no change in # of cells, but metabolic activity is high.
|
|
|
growth curve`
|
2. Log phase-bacteria multiply at the fastest rate possible under the conditions provided.
|
|
|
growth curve
|
3. stationary phase- equilibrium between cell division and death.
|
|
|
growth curve
|
4. death phase- the # of deaths exceeds the # of new cells formed.
|
|
|
Enumeration of cell number and culture mass-viable and total counts, turbidity
|
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.
|
|
|
Metabolic Activity
|
Measure metabolic activity. acid production is used to determine amts. of vitamins eg; of metabolic test.
|
|
|
Dry Weight
|
Fungus is removed from the medium, filtered pand placed in weighing bottle, dried . In bacteria removed from centrifugation.
|
