abstract |
PURPOSE: To provide the title composition capable of producing high- concentration vinegar in shorter time, containing, as active ingredients, 4,5- dihydro-4,5-dioxy-1H-pyrrolo[2,3-f]quinoline-2,7,9-tricarboxylic acid (PQQ) and Ca 2+ . n CONSTITUTION: The objective composition containing, as active ingredients, PQQ of the formula and Ca 2+ . This composition is incorporated in a fermentation solution so as to be ≥1μg/l of PQQ and ≥3mg/l, on a CaCl 2 basis, of Ca 2+ , each based on said solution. Also, this composition is added to an acetic fermentation medium to make an acetic fermentation to produce vinegar. By using this composition, high ADH (membrane-bound type alcohol dehydrogenase) activity can be retained even in, so to speak, stationary and dying periods where the growth of acetic bacteria has almost been terminated. As a result, high acetic acid productivity in the high concentration range can be maintained; therefore, high-concentration vinegar will be obtained in a shorter time. n COPYRIGHT: (C)1990,JPO&Japio |