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| An acid-loving organism that grows best between 0.1 and 5.4 pH level |
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| Organisms that can survive in the presence of oxygen but do NOT use it in their metabolism |
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| A complex polysaccharide extracted from certain marine algae and used in laboratories to grow and study microorganisms |
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| Alkali-loving organisms that exist best between 7.0 and 11.5 pH level |
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| A procedure used to minimize the chance that a pure culture will be contaminated by organisms from the environment |
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| Bacteria that live at high pressures (like deep in the sea) and die if left in a laboratory for even a few hours under standard atmospheric pressure. The high pressure is so the enzymes that they need to survive can keep their shape |
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| This is when a bacteria duplicates its DNA contents and divides into two cells. The two new cells (daughter cells) will also divide into two cells and so on.... |
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| Many different types of microorganisms growing together to make a layer on a surface. When a biofilm drows to a certain density (quorum) they release more inducer molecules that changes their genes. |
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| Useful medium to identify organisms that can cause hemolysis or breakdown of RBCs. Sheep's blood is used most because its hemolysis is more clearly defined than human blood. |
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| A process of cell division where a new small cell develops from the surface of its parent cell before separating from the parent cell. |
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| Carbon dioxide-loving organisms that thrive with low oxygen and high CO2. Many microaerophiles are also capnophiles |
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| Made from milk protein and contains many amino acids. Used to enrich certain media for microbial study |
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| An enzyme found in most obligate aerobes and facultative anaerobes that is used to convert hydrogen peroxide into water and molecular oxygen |
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Chemically nondefined medium
aka
complex medium |
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Definition
| Contains reasonably familiar materials but varies slightly in chemical composition from batch to batch. Contains blood or extracts from: beef, yeasts, soybeans, and other organisms |
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| A device used to keep the medium of a pure culture fresh so that the log phase of the isolated organism can be maintained indefinitely. It has a thermostat with reservoir of fresh medium replenishes the culture while removing the old medium |
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| The way microbial growth is displayed when they divide on a solid medium. They grow rapidly at the edges and die near the center. All phases of growth occur simultaneously in a colony; which is an example of nonsynchronous growth |
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