haemocytometer

Question 1

Calculate the volume (in nanolitres) above one of the 400 small squares

Answer 1

area of square = area of central platform/number of squares

volume = area x depth

Question 2

Calculate bacterial cells per mL from haemocytometer count

Answer 2

number of square in cell count x volume x diltuion = total volume

cell count / total volume = cells per mL