Bacterial mass measured with the MRC Grey-Wedge Photometer.
D001409:Bacillus cereus / Q000302:isolation & purification; D001431:Bacteriological Techniques; D010783:Photometry; D012486:Salmonella typhimurium / Q000302:isolation & purification; D013210:Staphylococcus / Q000302:isolation & purification