Changes in Quality of Pine Nuts (Pinus koraiensis) and Walnuts (Juglans regia) Coated with Protein Film Containing Green Tea Extract during Storage

녹차 추출물을 함유한 단백질 필름으로 코팅한 잣(Pinus koraiensis)과 호두(Juglans regia)의 저장 중 품질 변화

  • Published : 2004.10.31

Abstract

To elucidate quality changes of pine nuts and walnuts coated with green tea extract-containing protein film during storage, pine nuts and walnuts were coated with soy protein isolate (SPI) and zein film containing green tea extract, and stored at $35^{\circ}C$ for 4 weeks. During storage, peroxide, acid, and 2-thiobarbituric acid (TBA) values increased with increasing storage time regardless of treatments. Degrees of lipid oxidation were lowest in protein coating containing green tea extract, followed by protein coating and control. After 4 weeks, for pine nuts, 40, 32, and 21% of peroxide, acid, and TBA values respectively decreased by treatment of zein film coating containing green tea extract compared with control. For walnuts, 29, 24, and 21% of peroxide, acid, and TBA values respectively decreased. With SPI film coating, 41, 36, and 8% of peroxide, acid, and TBA values of pine nuts respectively decreased. For walnuts, 26, 28, and 5% of peroxide, acid, and TBA values respectively decreased by treatment of SPI film coating containing green tea extract.

Keywords

green tea extract;Juglans regia;Pinus koraiensis;protein film

References

  1. Lee M, Lee S, Song KB. Effect of various natural antioxidants on the safflower oil. Korean J. Food Preserv. 11: 126-129 (2004)
  2. Buonocore GG, Del Nobile MA, Di Martino C, Gambacorta G, La Notte E, Nicolais L. Modeling the water transport properties of casein-based edible coating. J. Food Eng. 60: 99-106 (2003) https://doi.org/10.1016/S0260-8774(03)00022-0
  3. Baldwin EA, Nisperos MO, Chen X, Hagenmaier RD. Improving storage life of cut apple and potato with edible coating. Postharvest. Biol. Technol. 9:151-163 (1996) https://doi.org/10.1016/S0925-5214(96)00044-0
  4. Fukuda T, Ito H, Yoshida T. Antioxidative polyphenols from walnuts (Juglans regia L.). Phytochemistry 63: 795-801 (2003) https://doi.org/10.1016/S0031-9422(03)00333-9
  5. Harris NE, Westcott DE, Henick AS. Rancidity in almonds: Shelf life studies. J. Food Sci. 37: 824-827 (1972) https://doi.org/10.1111/j.1365-2621.1972.tb03679.x
  6. Agbo OF, Anderson JC, Singh B. Lipid oxidation of edible peanut pastes during storage with variation of environmental and processing factors. Peanut Sci. 19: 101-105 (1992) https://doi.org/10.3146/i0095-3679-19-2-10
  7. Kim M. Changes in the concentration of tocopherol and carotenoid in pinenut oil during antioixdation. Korean Soc. Food Nutr. 22: 96-100 (1993)
  8. Trezza TA, Krochtak JM. Application of edible protein coating to nuts and nut-contaning food products. pp. 527-549. In: Protein Based Films and Coatings. Genadios A (ed). CRC Press, Inc., New York, NY, USA (2002)
  9. Yoon TH. Fatty acid composition of total lipids from seed of Pinus koraiensis. J. Korean Soc. Food Nutr. 16: 93-97 (1987)
  10. AOAC. Official Method of Analysis. 15th ed. Association of Official Analytical Chemists, Washington, DC, USA (1995)
  11. Cho HS, Park BH. Effect of onion and garlic juice on the lipid oxidation and quality characteristics during the storage of congereel (Astroconger myriaster). Korean J. Soc. Food Sci. 16: 135-142 (2000)
  12. Rhim JW, Gennadios A, Handa A, Weller CL, Hanna MA. Solubility, tensile, and color properties of modified soy protein isolate films. J. Agric. Food Chem. 48: 4937-4941 (2000) https://doi.org/10.1021/jf0005418
  13. Torres JA. Edible films and coatings from proteins. pp. 467-507. In: Protein Functionality in Food Systems. Hettiarachchy NS, Ziegler GR (eds). Marcel Dekker, Inc., New York, NY, USA (1994)
  14. Albert S, Mittal GS. Comparative evaluation of edible coating to reduce fat uptake in a deep-fried cereal product. Food Res. Int. 35: 445-458 (2002) https://doi.org/10.1016/S0963-9969(01)00139-9
  15. Park SK, Cho JM, Lee YS, Rhee CO. Extending shelf-life of rice cake using coating agent containing soy protein isolate. Korean J. Postharvest Sci. Technol. 8: 181-186 (2001)
  16. Mate JI, Frankel EN, Krochta JM. Whey protein isolate edible coatings: Effect on the rancidity process of dry roasted peanuts. J. Agric. Food Chem. 44: 1736-1740 (1996) https://doi.org/10.1021/jf9506646
  17. Kim M, Rhee SH, Ryu JH, Cheigh HS. Studies on the oxidative stability of pinenut oil. Korean J. Food Sci. Technol. 20: 868-872 (1988)
  18. Suja KP, Abraham JT, Thamizh SN, Jayalekshmy A, Arumughan C. Antioxidant efficacy of sesame cake extract in vegetable oil protection. Food Chem. 84: 393-400 (2004) https://doi.org/10.1016/S0308-8146(03)00248-6
  19. Mate JI, Krochta JM. Whey protein and acetylated monoglyceride edible coatings: Effect on the rancidity process of walnuts. J. Agric. Food Chem. 45: 2509-2513 (1997) https://doi.org/10.1021/jf960645b
  20. Gennadios A, McHugh TH, Weller CL, Krochta JM. Edible coating films based on proteins. pp. 201-227. In: Edible Coatings and Films to Improve Food Quality. Krochta JM, Baldwin EA, Nisperos-Carriedo M (eds). Technomic Publishing Company, Inc., Lancaster, PA, USA (1994)
  21. Mate JI, Krochta JM. Oxygen uptake model for uncoated and coated peanuts. J. Food Eng. 35: 99-312 (1998)
  22. Cosler HB. Prevention of staleness, rancidity in nut meats and peanuts. Peanuts J. Nut. World 37: 10-15 (1958)
  23. Yoon SH, Kim JW. Antioxidantive effects of various antioxidants on the soybean oil. J. Korean Soc. Food Nutr. 17: 19-23 (1988)