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Mcb lab practical

Terms in this set (25)

Magnification
Increases the apparent size of the observed specimen
Total magnification
Ocular magnification X objective magnification
Refractive index
Light bending ability of a medium ( ex. glass)
Working distance
The distance between the specimen on a slide and the objective lens
Parfocal
Where the microscope stays in focus when objectives are changed
Resolution power
The ability for the microscope to separate close details
Gram (+)
Stays purple
Thick peptidoglycan
Gram (-)
Pink/red
Differential staining
Separates bacteria into groups to be able to observe capsules or endospores
Gram staining, acid-fast staining
Nutrient broth/agar
Complex media's
With basic nutrition needed for the bacteria to grow
Slant agar
Increases surface area
Selective media
Only allows growth of one bacteria and inhibits all other bacteria
Differential media
Allows growth of different bacteria and shows specifics of each bacteria
Enriched media
contains complex organic substances such as blood, serum, hemoglobin, or special growth factors required by fastidious microbes
Blood agar
enrichment medium for fastidious microbes
differential media
Hemolytic
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