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

2. Dimensional Analysis Units of measures commonly encountered in the lab gg mM ng/  l femtogram

3. From Chapter 13: Seidman and Moore  I.A. Exponents  I.B. Scientific Notation  II.A. Common logarithims  II.B. Antilogarithims  II.C. Natural logarithims – skip for now  II. D. pH  III. Units  IV.A. Equations  IV.B. Units and Mathematical Operations

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

5. Prefixes m (meter)g (gram)l (liter) 10 3 mm10 3 mg10 3 ml 10 6  m10 6  g10 6  l 10 9 nm10 9 ng 10 12 pg 10 15 pg Use prefixes in tables and graphs

6. Most Commonly Encountered Units m (meter)g (gram)l (liter) 10 3 mm10 3 mg10 3 ml 10 6  m10 6  g10 6  l 10 9 nm10 9 ng 10 12 pg 10 15 fg Mass of protein, cellsVolume of solutions Weight of single cell Wavelength of light Size of virus Mass of DNA Volume of DNA or Enzyme Size of cells

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

8. Derived Units - Concentration g/l = mg/ml =  g/  l = ng/nl 10 3 mg/l = 10 3  g/ml = 10 3 ng/  l

9. Derived Units - Concentration g/l = mg/ml =  g/  l = ng/nl 10 3 mg/l = 10 3  g/ml = 10 3 ng/  l [DNA] [Pro] ppm

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

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

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

13. mM   millimolar – units mmol/l – symbol mM   M x 10 3 eg. 0.05 M = 50 mM   Concentration of buffers (Tris, Phosphate) and other salts (EDTA) in solutions

14. MMMM   micromolar – units  mol/l – symbol  M   mM x 10 3 eg. 0.5 mM = 500  M   Concentration of trace minerals and vitamins   K M of many enzymes