Microbial Growth

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Microbiology
Chapters 6, 7, 20
ch.6
Subjects:
microbiology
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1

microbial growth

the number of cells, not the size of the cells.

2

psychrophiles

cold-loving microbes

3

mesophiles

moderate-temperature -loving microbes

4

minimum growth

is the lowest temperature at which the species will grow.

5

optimum growth

is the temperature at which the species grows best.

6

maximum growth

is the highest temperature at which growth is possible.

7

Trace elements

microbes require very small amounts of other mineral elements, such as iron, copper, molybdenum, and zinc.

8

plasmolysis

shrinkage of the cell's cytoplasm.

9

inoculating loop

a device used for handing bacteria in the laboratory.

10

extreme halophile

high salt concentration that they actually require them for growth.

11

obligate halophiles

must first be dipped into a saturated slat solution.

12

facultative halophiles

do not require high salt concentration but are able to grow at salt concentration up to 2%.

13

agar

a complex polysaccharide isolated from marine algae.

14

biofilm

thin, slimy layer encasing bacteria that adheres to a surface.