10 terms

Tools of the Biologist

STUDY
PLAY
Compound Light Microscope
Microscope that allows light to pass through a specimen and uses two lenses to form an image.
Electron Microscope
Microscope that forms an image by focusing beams of electrons onto a specimen.
Eyepiece
Contains the lense through which we look, typically 10x
Objective lens
Individual lens attached to the revolving nose piece, magnification varies.
Total Magnification
Determined by multiplying the eyepiece power (usually 10x) by the objective lens in place
Centrifuge
an apparatus that rotates at high speed to separate substances of different densities
Chromatography
A process used for separating mixtures by virtue of differences in absorbency.
Gel Electrophoresis
Separates DNA fragments by size using an electric current
Diaphragm
Controls the amount of light reaching the specimen
FOV
Field of View; the area of a specimen which is visible at any given maginfication. The field of view decreases as the magnification increases.
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