Method for controlling the concurrent growth of two or more lact

Details Method for controlling the concurrent growth of two or more lact Method for controlling the concurrent growth of two or more lact

1987-08-17

1990-09-04

Schwartz, Richard A.

Chemistry: molecular biology and microbiology

Micro-organism, per se ; compositions thereof; proces of...

Bacteria or actinomycetales; media therefor

435 42, 435139, 435170, 4352521, 4352529, 4352534, 4352536, 435885, 435853, 426 7, 426 34, 426 36, 426 42, 426 43, C12N 120, C12P 3900, C12P 756, A23C 1900

Patent

active

049544500

ABSTRACT:
Disclosed is a method of growing a mixture of two or more species of lactic acid producing bacteria whose growth rates are differently affected by the pH of the nutrient growth medium. The method involves maintaining the pH of the medium at a low level which actively selects for the growth of one species until that species has reached the desired concentration. The pH is then raised to a level that actively selects for the growth of another species and maintained at this level until that species has reached the desired concentration. The method is especially useful for preparing a starter culture for Italian type cheese containing a mixture of coccus and rod bacteria because the ratio of these bacteria, one to the other, can be closely controlled.

REFERENCES:
patent: 3998700 (1976-12-01), Reinhold et al.
patent: 4282255 (1981-08-01), Sandine et al.
patent: 4622304 (1986-11-01), Reddy

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