lab procedures test 1

A ?

objective lenses

B ?

condenser

C ?

nosepiece

D ?

fine adjustment knob

E ?

coarse adjustment knob

F ?

ocular lenses

G ?

stage

H ?

light source

very first step of cleaning a microscope ?

bring stage to lowest height

how to clean ocular lenses of microscope ?

lens paper

how to clean the (100x) objective lens of a microscope ?

use part of a lens paper, wipe off excess oil

how to clean (4x) objective lens of a microscope ?

use the clean part of the same lens paper, add a few drops of lens cleaner, wipe it, then after, clean the (10x) then up to the (100x) lens

how do you get rid of the excess lens cleaner from the objective lenses of a microscope?

use a dry part of same lens paper and wipe off excess

how to put away microscope ?

turn off microscope and put on dust cover

how to clean refractometer ?

rinse with distilled water over sink, take a new Kim wipe and wipe off excess water, (a small amount of alcohol can be used to clean prism glass & cover plate, place refractometer back into protective case once dry

how to calibrate a refractometer before use ?

place water drop on prism cover glass, hold refractometer up to light and look into eye piece, scale should read 1.000 SG and adjusting if needed

how to measure specific gravity

take a sample with a pipette, place drop on prism cover glass. put down cover plate over sample, hold refractometer up to a light, look into eyepiece and use focuson eyepiece if blurry. read result using appropriate scale

things checked in a gross Exam

odor, colour,

what is In a gross exam

odor, clarity, colour,　foam

if.sg is morethan 1.050

dilute urIne sample with.1 to 1 ratio urine to.distilled water, if.reading is 1.040 multiply last two numbers by two and.you.get.1.080