Method for preparing yoghourt rich in gamma-aminobutyric acid (GABA)
A technology of yogurt and inoculation amount, applied in the directions of milk preparations, dairy products, applications, etc., can solve the problems of high GABA cost, low GABA content, low GABA, etc., to shorten the curdling time, increase GABA content, and high safety. Effect
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specific Embodiment approach 1
[0023] Specific embodiment one: the preparation method that this embodiment is rich in GABA yoghurt realizes according to the following steps:
[0024] 1. Resuscitate, purify and activate Lactobacillus plantarum NDC 75017, Lactobacillus bulgaricus 11057 and Streptococcus thermophilus CICC 20379 stored at -80°C;
[0025] 2. Inoculate the activated Lactobacillus plantarum NDC 75017 to a final concentration of 30 mM sodium glutamate, vitamin B 6 In MRS liquid medium with a final concentration of 5 μM, culture at 30°C for 10-12 hours to obtain expansion medium A;
[0026] 3. Inoculate the activated Lactobacillus bulgaricus 11057 into the MRS liquid medium according to the inoculation amount of 2%, and cultivate it at 37°C for 10-12 hours to obtain the expanded culture medium B;
[0027] 4. Inoculate the activated Streptococcus thermophilus CICC 20379 into the M17 liquid medium according to the inoculation amount of 2%, and cultivate it at 37°C for 10-12 hours to obtain the expand...
Embodiment
[0039] The preparation method that is rich in GABA yoghurt realizes according to the following steps:
[0040] 1. Resuscitate, purify and activate Lactobacillus plantarum NDC 75017, Lactobacillus bulgaricus 11057 and Streptococcus thermophilus CICC 20379 stored at -80°C;
[0041] 2. Inoculate the activated Lactobacillus plantarum NDC 75017 to a final concentration of 30 mM sodium glutamate, vitamin B 6 In the MRS liquid medium with a final concentration of 5 μM, culture at 30°C for 10 hours to obtain the expansion medium A;
[0042] 3. Inoculate the activated Lactobacillus bulgaricus 11057 into the MRS liquid medium according to the inoculation amount of 2%, and cultivate it at 37° C. for 10 hours to obtain the expanded culture medium B;
[0043] 4. Inoculate the activated Streptococcus thermophilus CICC 20379 into the M17 liquid medium according to the inoculation amount of 2%, and cultivate it at 37°C for 10-12 hours to obtain the expanded culture medium C;
[0044] 5. Cen...
specific Embodiment approach 2
[0065] Specific embodiment two: the difference between this embodiment and specific embodiment one is: every liter of MRS liquid culture medium in step 2 consists of 5g of peptone, 5g of beef extract, 5g of yeast powder and 10g of tryptone, 1.0mL of Tween -80, 20g of glucose, 10 ml of 5 kinds of salt solutions and the rest of distilled water, adjust the pH to 5.8, autoclave at 121°C for 20min; the 5 kinds of salt solutions: 20g K 2 HPO 4 ·3H 2 O+100mL distilled water, 20g diammonium hydrogen citrate+100mL distilled water, 50g sodium acetate+100mL distilled water, 5.8g MgSO 4 ·7H 2 O+100mL distilled water, 2.5gMnSO 4 ·H 2 0+100mL distilled water. Other steps and parameters are the same as those in Embodiment 1.
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