A cell can act in astonishingly complex ways. It must decide for itself whether to grow and multiply, rest, specialize, age ...

Calibration is one of the most critical steps in the pH measurement process. Some of the common calibration-related problems include out-of-range slope values and cell constants, inaccurate readings ...

You should never mix any other cleaners with bleach, since bleach can produce potentially fatal compounds when combined with other chemicals.