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Effects of tourmaline ceramic balls on growth and metabolism of Saccharomyces cerevisiae, Lactobacillus acidophilus and Aspergillus oryzae were studied. Treatments with 3, 6, 9 or 12 g of tourmaline ceramic balls in a 50 ml culture showed significant stimulation of the growth of the three microorganisms. In optimal treatments with 12 g of tourmaline balls, the growth of S. cerevisiae, L. acidophilus...
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