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Journal of Food Science and Technology

, Volume 50, Issue 6, pp 1137–1143 | Cite as

Development of shelf-stable, ready-to-eat (RTE) shrimps (Litopenaeus vannamei) using water activity lowering agent by response surface methodology

  • Hongbo Cui
  • Changhu XueEmail author
  • Yong Xue
  • Wei Su
  • Zhaojie Li
  • Haihua Cong
Original Article

Abstract

Three water-activity-lowering agents (composite phosphate, sorbitol and glycerol) were used to develop a kind of shelf-stable, ready-to-eat (RTE) shrimp. Formula of water-activity- lowering agents was optimized by response surface methodology (RSM) using a central composite design. Model equation was proposed with regard to the contents of composite phosphate (X1), sorbitol (X 2) and glycerol (X3) : \( Y = {1}.000{4} - 0.{5851}{{\text{X}}_1} - 0.0{322}{{\text{X}}_2} - 0.0{243}{{\text{X}}_3} + 0.0{167}{{\text{X}}_1}{{\text{X}}_2} + 0.0{156 }{{\text{X}}_1}{{\text{X}}_3} + {1}.0000 \times {1}{0^{ - {3}}}{{\text{X}}_2}{{\text{X}}_3} + {1}.0{\text{844X}}_1^2 + {3}.{35}00 \times {1}{0^{ - {3}}}{\text{X}}_2^2 + {2}.{6}000 \times {1}{0^{ - {3}}}{\text{X}}_3^2 \). The model with a very low probability value (P < 0.0003) was highly significant and the value of lack-of-fit was 0.4028, indicating that the model could predict water activity of shrimps using different agents. Composite phosphate of 0.22%, sorbitol of 3.12% and glycerol of 2.51% were found to be the optimal condition to obtain the lowest water activity of 0.884. Compared to the control shrimps, RTE shrimps treated with water-activity-lowering agents had a longer shelflife and higher sensorial acceptability. During storage at temperature of 35 °C, the quality of RTE shrimps in term of appearance, flavor and texture was found to be superior to the untreated ones. Texture profile, TBARS value, contents of astaxanthin and free amino acid of treated samples were found to be decreased slower from origin value compared to that of untreated samples. These RTE shrimps were biologically safe and sensorially acceptable after 30 days of storage at temperature of 35 °C. Briefly, the application of water-activity-lowering agents extent the shelflife of RTE shrimps obviously and would be beneficial for the exploitation of white shrimp.

Keywords

Ready-to-eat shrimp Water-activity-lowering agent Response surface methodology Storage 

Notes

Acknowledgments

This work was supported by National Marine Public Welfare Scientific Research Project of China (No.201105029), International Science & Technology Cooperation Program of China (No. 2010DFA31330) and National High Technology Research and Development Program of China (No.2011AA100803).

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Copyright information

© Association of Food Scientists & Technologists (India) 2011

Authors and Affiliations

  • Hongbo Cui
    • 1
  • Changhu Xue
    • 1
    Email author
  • Yong Xue
    • 1
  • Wei Su
    • 1
  • Zhaojie Li
    • 1
  • Haihua Cong
    • 1
  1. 1.College of Food Science and Engineering, Department of Food Science and TechnologyOcean University of ChinaQingdaoPeople’s Republic of China

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