Another technology that ERRC scientists have improved USES pulsed electric fields (PEF) to kill yeasts, molds, and vegetative bacteria in liquid foods.

It was found that the grape pigment had stronger antibacterial action on most parts of the bacterium and weaker antibacterial action on the some yeasts, and few effects on molds as well.

Sanitary quality usually is measured by counts of bacteria, yeast, mold, and insect fragments, as well as by sediment levels.