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Table 4 Changes of organic acids content between blank group, sample group and control group

From: Proliferation of Bifidobacterium L80 under different proportions of milk protein hydrolysate

Group

0 h

12 h

24 h

36 h

48 h

60 h

72 h

Formic acid

 S

375.23 ± 13.96Aa

346.60 ± 41.73Aa

363.71 ± 30.42Aa

316.24 ± 46.37Aa

296.80 ± 38.54Ac

368.52 ± 64.11Aa

323.46 ± 29.25Aa

 C

132.55 ± 14.98Ab

136.46 ± 16.92Aa

148.86 ± 17.71Aa

171.44 ± 17.08Ba

172.66 ± 16.84Ba

180.43 ± 19.77Ba

170.89 ± 26.31Ba

 B

161.66 ± 21.25Aa

169.25 ± 19.69Aa

162.05 ± 7.05Aa

175.36 ± 17.74Ba

179.44 ± 14.49Ba

176.04 ± 18.83Ba

182.36 ± 24.02Ba

Malic acid

 S

1509.57 ± 13.26Aa

1796.97 ± 47.06Ba

1713.53 ± 38.01Ba

1746.78 ± 26.62Ba

1795.79 ± 26.36Ba

3509.39 ± 6.55Ca

3964.10 ± 32.18Ca

 C

984.97 ± 51.64Ab

1545.00 ± 4.17Bb

8824.06 ± 40.23Cb

4276.99 ± 73.35Db

3798.85 ± 10.08Eb

829.83 ± 87.97Ab

816.47 ± 36.04Ab

 B

740.72 ± 19.22Ac

884.60 ± 18.61Bc

875.05 ± 39.19Bc

1107.02 ± 70.78Cc

1121.89 ± 46.17Cc

1203.91 ± 27.87Cc

1211.81 ± 33.16Cc

Acetic acid

 S

11,808.40 ± 37.46Aa

10,749.70 ± 71.55Aa

15,281.85 ± 36.09Ba

25,955.56 ± 24.28Ca

19,537.92 ± 46.78 Da

26,054.04 ± 46.61Ea

28,959.24 ± 53.51Fa

 C

11,999.17 ± 48.58Aa

39,144.76 ± 54.20Bb

28,442.37 ± 72.75Cb

19,331.98 ± 30.87Db

37,808.13 ± 40.42Ea

13,416.85 ± 57.67Fb

14,136.17 ± 67.28Fb

 B

11,979.74 ± 259.99Aa

11,712.70 ± 152.85Ba

22,185.18 ± 40.65Cc

26,274.13 ± 52.95Dc

26,223.01 ± 31.54Ec

23,345.78 ± 68.56Fc

20,390.12 ± 58.00Gc

Tartaric acid

 S

7076.60 ± 45.05Aa

10,936.73 ± 175.16Ba

8280.10 ± 129.98Ca

14,642.50 ± 162.01 Da

15,503.45 ± 190.70Ca

22,189.72 ± 17.13 Da

8028.57 ± 250.80Ca

 C

3021.09 ± 69.46Aa

4423.68 ± 287.38Bb

2279.29 ± 146.66Bb

3634.52 ± 63.66Bb

11,095.15 ± 76.35Bb

6527.85 ± 22.87Bb

10,804.73 ± 78.58Bb

 B

8080.52 ± 664.09Aa

4796.85 ± 698.35Bb

26,237.91 ± 279.37Bc

29,573.06 ± 453.82Cc

5593.38 ± 48.66Dc

33,504.45 ± 34.46Ec

4656.49 ± 24.51Bc

Lactic acid

 S

15,928.88 ± 38.46Aa

23,462.22 ± 98.99Ba

38,533.43 ± 31.55 Da

44,123.76 ± 216.39Ea

52,962.41 ± 64.50Fa

60,765.36 ± 73.53 Ga

683,687.47 ± 36.87Ha

 C

19,988.31 ± 316.88Ab

13,108.94 ± 1240.51Bb

12,969.60 ± 257.78Cb

13,411.65 ± 1328.58Bb

12,128.05 ± 702.84Bb

11,317.57 ± 62.91Bb

11,190.02 ± 60.49Bb

 B

13,539.66 ± 56.66Aa

14,016.28 ± 31.51Bc

14,262.22 ± 56.59Cc

48,697.84 ± 67.83Dc

59,608.36 ± 1291.34Dc

61,204.75 ± 1128.17 Da

63,937.61 ± 5136.01Dc

Citric acid

 S

2833.59 ± 250.87Aa

1827.42 ± 142.72Aa

507.97 ± 50.07Aa

539.52 ± 43.98Aa

188.95 ± 77.93Aa

1955.97 ± 47.73Aa

478.22 ± 28.26Aa

 C

1301.16 ± 83.21Ab

1791.26 ± 50.82Ba

822.82 ± 40.27Cb

635.84 ± 186.69Db

849.45 ± 20.53Cb

1406.05 ± 62.47Eb

1545.00 ± 46.72Eb

 B

748.19 ± 39.63Ac

613.27 ± 163.18Ac

430.99 ± 79.94Bc

1227.71 ± 46.07Cc

2060.72 ± 57.59Dc

797.49 ± 48.12Ec

549.27 ± 105.85Fc

  1. In the figure, S refers to the sample group with 1:9 proportion of macromolecules and small molecule peptides in MPH addition to MRS medium; C refers to the control group with the milk protein addition to MRS medium; B refers to the blank group with the basic MRS medium. A−H Different alphabets indicate significant differences between different time at the same group (P < 0.05). a−c Different alphabets indicate significant differences between sample groups, control group and bland group within a row (P < 0.05)