Microbiology Chapter 6 - Microbial Growth and Nutrition

any chemical such as carbon, hydrogen, etc. required for growth of microbial populations

microorganism which requires light energy and uses carbon dioxide as a carbon source

microorganism that uses carbon dioxide as a carbon source and catabolizes organic molecules for energy

microorganism that uses organic compounds for both energy and carbon

microorganism that requires oxygen as the final electron acceptor of the electron transport chain

microorganism which can live with or without oxygen

microorganism that requires low levels of oxygen

the conversion of atmospheric nitrogen to ammonia

element required in very small amounts for microbial metabolism

temperature at which a microorganism’s metabolic activities produce the highest growth rate

microorganisms requiring cold temperatures (below 20C)

microorganism requiring temperatures ranging from 20C to about 40C

microorganism requiring temperatures above 45C

microorganism requiring temperatures above 80C

microorganism requiring acidic pH

microorganism requiring a saline environment (greater than 9% NaCl)

a slimy community of microbes growing on a surface

sample of microorganisms

a collection of nutrients used for cultivating microorganisms

act of cultivating microorganisms or the microorganisms that are cultivated

visible population of microorganisms living in one place; an aggregation of cells arising from a single parent cell

a liquid, nutrient-rich medium used for cultivating microorganisms

gel-like polysaccharide isolated from red algae and used as thickening agent

culture containing cells of only one species

method of culturing microorganisms in which a sterile inoculating loop is used to spread an inoculum across the surface of a solid medium in Petri dishes

method of culturing microorganisms in which colony-forming units are separated from one another using a series of dillutions

test tube containing agar media that solidified while the tube was resting at an angle

culturing medium of which the exact chemical composition is known

culturing medium that contains nutrients released by the partial digestion of yeast, beef, soy, or other proteins; thus, the exact chemical composition is unknown

culturing medium formulated such that either the presence of visible changes in the medium or differences in the appearance of colonies help microbiologists differentiate among different kinds of bacteria growing on the medium

culturing medium containing substances that either favor the growth of particular microorganisms or inhibit the growth of unwanted ones

special culturing medium containing compounds that combine with free oxygen and remove it from the medium

removal of water from a frozen culture or other substance by means of vacuum pressure – used for the long-term preservation of cells and foods

long-term storage of cultures at temperatures ranging from -50C to -90C

time required by a cell to grow and divide