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  • Title: Evaluation of substrates and storage conditions for preparing and maintaining starter cultures for tempeh fermentation.
    Author: Shambuyi M, Beuchat LR, Hung YC, Nakayama T.
    Journal: Int J Food Microbiol; 1992; 15(1-2):77-85. PubMed ID: 1622761.
    Abstract:
    Heat-pasteurized cassava root, cowpeas, partially defatted peanuts, rice and soybeans were evaluated for their suitability to support growth and sporulation of the tempeh mold, Rhizopus microsporus var. oligosporus, and the oncom mold, Neurospora intermedia, at 25, 30 and 37 degrees C. The molds grew best and sporulated most luxuriantly on cassava and rice incubated at 37 degrees C. Viability of molds remained high for up to 30 weeks when dried (a(w) 0.48), powdered substrates on which the molds had been cultured, were stored at 5, 25 and 37 degrees C. Survival was best when powders were stored at 5 degrees C, although storage at 25 degrees C did not cause a marked decline in CFU/g. R. microsporus var. oligosporus starter cultures produced on rice and then stored for 20 weeks at these temperatures compared most favorably with commercial starter cultures for preparing high-quality soybean tempeh. The simple technology required to prepare these starter cultures enhances the potential for their application in developing countries where the introduction of nontraditional fermented legume foods to low-protein diets could help to ameliorate malnutrition.
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