all from tiktoks

magnification

how much larger the specimen appears

resolution

ability to distinguish two close points as separate

total magnification

ocular lens x objective lens

scanning lens

4x lens

low power lens

10x lens

high dry lens

40x lens

oil immersion lens

100x

improves resolution by reducing light refraction

streak plate

isolates individual colonies

loop dragged across agar plate

each section spreads fewer cells (forms isolated colonies)

*diluting bacteria across surface

good streak plate

heavy growth at beginning

less growth farther

isolated colonies near final

simple staining

uses one dye to see cell shape, size, arrangement

does not differentiate organisms into major groups like Gram stain does

culture media

nutrient material used to grow microorganisms

broth

liquid medium

agar

solidifying agent used in many solid media

agar plate

petri dish containing solid medium

agar slant

agar solidified at an angle in a tube

agar deep

agar solidified upright in a tube

general purpose media

supports growth of many organisms

selective media

favors growth of certain organisms while inhibiting others

pure culture

one type of microorganism

coccus

sphere

bacillus

rod

spirillum

spiral

staphylo

clusters

strepto

chains

gram-positive

purple/blue

gram-negative

pink/red

gram stain order

crystal violet

iodine

alcohol

safranin