ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (8): 1436-1445.doi: 10.11843/j.issn.0366-6964.2017.08.007

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Effect of Different Parities on the Antioxidant Activity of Dairy Goat Placenta Extract

GAO Shan-shan1, GE Wu-peng1*, PEI Jian-fei1, WANG Xi-ning2, LI Xiao-peng3, LIANG Xiu-zhen4, WU Xiao-yong3   

  1. 1. College of Food Science and Engineering, Northwest A & F University, Yangling 712100, China;
    2. Yangling Demonstration Zone Hospital, Yangling 712100, China;
    3. Xianyang Food and Drug Inspection Center, Xianyang 712000, China;
    4. Shaanxi Feitian Dairy Co. Ltd., Baoji 721100, China
  • Received:2017-02-22 Online:2017-08-23 Published:2017-08-23

Abstract:

The objective of this work was to explore the impact of parities on antioxidant activities of extractions from dairy goat placenta, which could provide technical foundation to the application of placenta. The scavenging rate of DPPH radical and hydroxyl radical were taken as the evaluate indices of antioxidant peptides activity, the water-soluble protein content in the extract was also taken into account. The changes of placenta extract indices for different parities were compared and the attenuation of indicators with the change of storage conditions was investigated. The results showed that:1) The polypeptides contents of 1st, 2nd, 3rd parities in placenta were (0.201±0.03), (0.270±0.02) and (0.193±0.02) mg·mg-1 dry matter, respectively. The DPPH radical scavenging rate of 1st, 2nd, 3rd parities were 32.75%, 53.20% and 37.97%.The scavenging rate of hydroxyl radicals of these 3 parities were 35.45%, 51.94% and 39.35%. The water-soluble protein content were 16.63%, 23.87% and 18.60%, respectively. 2) Compared with the ambient temperature, the decay rate was slower under the condition of 4℃, there was significant difference among parities under different conditions (P<0.05). 3) The preservation rate of DPPH radical scavenging of 2nd parities at 4℃ was 78.85%.The preservation rate of hydroxyl radicals scavenging activity of 2nd parities was 71.93%. The preservation rate of the water-soluble protein content was 77.36%. In conclusion, it is demonstrated that the 2nd parities was the most prominent on antioxidant activity, dacay rate and WSP content and 4℃ was the ideal storage temperature for the preservation of activities.

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