Create an account
steps to preperation of specimens
smear on microorganisms on slide, fixing, flood with stain, washing, drying, microscope observation
positive ion stain
Dyes used in microbiology are salts in which the colored ion is reffered as
aka acidic stain
stains the background, bacteria do not stain with electronegative stain, because both bacteria and dye are electronegative resulting in ionic repulsion.. Advantage is NO FIXING
Gram positive and negative bacteria may appear if
Bacteria stain poorly or not at all, or older cultures of gram positive bacteria give inconsistent results
crystal violet-iodine can be removed from gram negative bacteria with alcohol because
alcohol is decolorizing agent
Most chemoheterotrophic bacteria are grown... Media for which the exact chemical composition varies slightly from batch to batch.
marine red algae with unique properties that make it useful in culture media. Few microbes degrade agar so it remains solid during microbial growth. Liquifies 100 degrees C and remains liquid state until cooled 40 degrees C.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together