Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (35): 125-133.doi: 10.11924/j.issn.1000-6850.casb2021-0651

Special Issue: 生物技术

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Application of Gallic Acid-KGM Composite Fresh-keeping Film from Stems and Leaves of Scutellaria baicalensis Georgi to Egg Preservation

LI Le(), ZHANG Xiaohu(), YANG Lan   

  1. College of Biology Pharmacy and Food Engineering, Shangluo University/Shaanxi Qinling Industrial Technology Research Institute of Special Biological Resources, Shangluo, Shaanxi 726000
  • Received:2021-07-01 Revised:2022-09-29 Online:2022-12-15 Published:2022-12-09
  • Contact: ZHANG Xiaohu E-mail:1240157221@qq.com;zxh5462@163.com

Abstract:

In order to prolong the shelf life of eggs, composite fresh-keeping film was prepared with gallic acid from the stems and leaves of Scutellaria baicalensis Georgi in Shangluo as the research object. In this study, gallic acid was extracted from the stems and leaves of Scutellaria baicalensis Georgi by ultrasonic-assisted ethanol extraction, and the extraction amount was 203.35 mg/g; the bacteriostasis experiment was carried out on the extracted concentrated solution of gallic acid to study the bacteriostatic ability of gallic acid against Staphylococcus aureus, Escherichia coli and Salmonella enteritidis. The results showed that the bacteriostatic effect was on Escherichia coli< Staphylococcus aureus< Salmonella enteritidis. Based on the single factor experiment of the preservation effect of gallic acid, konjac glucomannan, chitosan and citric acid, the response surface methodology was used to optimize the compound preservation formula with Haugh unit as the response value. The results showed that the best ratio of gallic acid, konjac glucomannan, chitosan and citric acid was 1.85%, 1.24%, 1.96% and 3%, respectively. In summary, the Haugh unit of egg can reach 74.86±2.61 when the composite fresh-keeping film made from this formula is evenly spread on the egg which will be stored at 37℃ for 15 days. The composite fresh-keeping film prepared is environment-friendly and safe, which can provide technical reference for egg preservation.

Key words: stems and leaves of Scutellaria baicalensis, gallic acid, konjac glucomannan, composite fresh-keeping film, egg, preservation

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