Units of measures commonly encountered in the lab Dimensional Analysis Units of measures commonly encountered in the lab

Units of measures commonly encountered in the lab ng/ml mM mg Dimensional Analysis femtogram Units of measures commonly encountered in the lab

From Robyt 1.1.1 Significant Figures 1.1.2 Scientific Notation 1.1.3 Units

Most Commonly Encountered Units m (meter) g (gram) l (liter)

Use prefixes in tables and graphs m (meter) g (gram) l (liter) 103 mm 103 mg 103 ml 106 mm 106 mg 106 ml 109 nm 109 ng 1012 pg 1015 pg Use prefixes in tables and graphs

Most Commonly Encountered Units m (meter) g (gram) l (liter) 103 mm 103 mg 103 ml Mass of protein, cells Volume of solutions 106 mm 106 mg 106 ml Size of cells Volume of DNA or Enzyme Mass of DNA 109 nm 109 ng Wavelength of light Size of virus Mass of DNA 1012 pg Weight of single cell 1015 fg

Derived Units - Concentration g/l = mg/ml = mg/ml = ng/nl

Derived Units - Concentration g/l = mg/ml = mg/ml = ng/nl 103 mg/l = 103 mg/ml = 103 ng/ml

Derived Units - Concentration [Pro] [DNA] g/l = mg/ml = mg/ml = ng/nl 103 mg/l = 103 mg/ml = 103 ng/ml ppm [DNA]

Derived Units - Concentration g/l g/mol = mol/l (M)

Molar Concentrations g/l = mg/ml = mg/ml = ng/nl___ g/mol mg/mol mg/mmol ng/nmol =? =? =? =?

Molar Concentrations g/l = mg/ml = mg/ml = ng/nl g/mol mg/mmol mg/mmol ng/nmol = mol/l (moles per liter) = M (molar concentration)

mM millimolar – units mmol/l – symbol mM M x 103 eg. 0.05 M = 50 mM Concentration of buffers (Tris, Phosphate) and other salts (EDTA) in solutions

mM micromolar – units mmol/l – symbol mM mM x 103 eg. 0.5 mM = 500 mM Concentration of trace minerals and vitamins KM of many enzymes