Urine concentration can affect the semiquantitative results of the dipstick (dilute urine will result in underestimation of protein). A special indicator dye, Bromophenol blue, is most sensitive to albumin. However, it may not detect globulins and Bence-Jones proteins (secreted in multiple myeloma,...
There are a number of stains to determine viability of protoplasts, one of them is Fluorescein Diacetate (FDA) stain that has been used often, and as an alternative there is Evan's blue stain, bromophenol blue stain, methylene blue stain and phenosafranin stain. Which is the most convenient ...