Changes in quality characteristics of tofu with freezing treatment of soybeans

Abstract

The aim of this study was to investigate the influence of length of freezing time (−18°C for 5 or 24 h) on the quality characteristics of tofu. The yield and moisture content of tofu obtained from frozen soybean were lower than control tofu. Tofu made from frozen soybeans showed higher hardness, gumminess and chewiness than the control. Freezing treatment also made the microstructure of the tofu more uniform than the control. However, after 24-h freezing, hardness decreased and the microstructure of tofu appeared to form pores. Sensory evaluation showed that mouth-feel decreased with an increase of freezing time. Among all of tofu frozen at −18°C, 5-h freezing treatment showed the highest overall acceptability. These results indicate that the length of time that soybeans are frozen before making tofu affects the quality of tofu.

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References

  1. 1.

    Liu ZS, Chang SKC. Effect of soy milk characteristics and cooking conditions on coagulant requirements for making filled tofu. J. Agr. Food Chem. 52: 3405–3411 (2004)

    CAS  Article  Google Scholar 

  2. 2.

    Tang CH. Effect of thermal pretreatment of raw soymilk on the gel strength and microstructure of tofu induced by microbial transglutaminase. LWT-Food Sci. Technol. 40: 1403–1409 (2007)

    CAS  Article  Google Scholar 

  3. 3.

    Kong F, Chang SKC, Liu Z, Wilson LA. Changes of soybean quality during storage as related to soymilk and tofu making. J. Food Sci. 73: 134–144 (2008)

    Article  Google Scholar 

  4. 4.

    Lim BT, de Man JM, de Man L, Buzzell RI. Yield and quality of tofu as affected by soybean and soymilk characteristics. Calcium sulfate coagulant. J. Food Sci. 55: 1088–1092 (1990)

    Google Scholar 

  5. 5.

    Saio K. Tofu-relationships between texture and fine structure. Cereal Food. World 24: 342–354 (1979)

    CAS  Google Scholar 

  6. 6.

    Shen CF, de Man L, Buzzel RI, de MAN JM. Yield and quality of tofu as affected by soybean and soymilk characteristics: Glucono delta lactone coagulant. J. Food Sci. 56: 109–112 (1991)

    CAS  Article  Google Scholar 

  7. 7.

    Sun N, Breene WM. Calcium sulphate concentration influence on yield and quality of tofu from five soybean varieties. J. Food Sci. 56: 1604–1607 (1991)

    CAS  Article  Google Scholar 

  8. 8.

    Wally-Vallim, A, Vanier NL, Zavareze ER, Zambiazi RC, de Castro LAS, Schirmer MA, Elias MC. Isoflavone aglycone content and the thermal, functional, and structural properties of soy protein isolates prepared from hydrothermally treated soybeans. J. Food Sci. 79: 1351–1358 (2014)

    Article  Google Scholar 

  9. 9.

    Noh, EJ, Kang C, Hong ST, Yun SE. Freezing of soybeans influences on hydrophobicity of soy protein. Food Chem. 97: 212–216 (2006)

    CAS  Article  Google Scholar 

  10. 10.

    Fuchigami M, Ogawa N, Teramoto A. Trehalose and hydrostatic pressure effects on the structure and sensory properties of frozen tofu (soybean curd). Innov. Food Sci. Emerg. 3: 139–147 (2006)

    Article  Google Scholar 

  11. 11.

    Lee DR, Choi YH, Kim MK, Yun, SE. Influence of freezing upon the cooking time and eating quality of beans. J. Appl. Biol. Chem. 35: 219–226 (1992)

    CAS  Google Scholar 

  12. 12.

    Hashizume K, Kakiuchi K, Koyama E, Watanabe T. Denaturation of soybean protein by freezing. Agr. Biol. Chem. 35: 449–459 (1971)

    CAS  Google Scholar 

  13. 13.

    Noh EJ, Park SY, Park JI, Hong ST, Yun SE. Coagulation of soymilk and quality of tofu as affected by freeze treatment of soybeans. Food Chem. 91: 715–721 (2005)

    CAS  Article  Google Scholar 

  14. 14.

    Lee S, Inglett GE. Functional characterization of steam jet-cooked ß-glucanrich barley flour as an oil barrier in frying batters. J. Food Sci. 71: 308–313 (2006)

    Article  Google Scholar 

  15. 15.

    Kim, YS, Choi, YM, Noh, DO, Choi, SY, Suh, HJ. The effect of oyster shell powder on the extension of the shelf life of tofu. Food Chem. 103: 155–160 (2007)

    CAS  Article  Google Scholar 

  16. 16.

    Akingbala JO, Oguntimein GB, Sobande AO. Physico-chemical properties and acceptability of yam flour substituted with soy flour. Plant Food. Hum. Nutr. 48: 73–80 (1995)

    CAS  Article  Google Scholar 

  17. 17.

    Cai TD, Chang KC. Dry tofu characteristics affected by soymilk solid content and coagulation time. J. Food Quality 20: 391–402 (1997)

    Article  Google Scholar 

  18. 18.

    Hu H, Eunice CY, Chan L, Wan L, Tian M, Pan, S. The effect of high intensity ultrasonic pre-treatment on the properties of soybean protein isolate gel induced by calcium sulfate. Food Hydrocolloid. 32: 303–311 (2013)

    CAS  Article  Google Scholar 

  19. 19.

    Lee CY, Kuo MI. Effect of ã-polyglutamate on the rheological properties and microstructure of tofu. Food Hydrocolloid. 25: 1034–1040 (2011)

    CAS  Article  Google Scholar 

Download references

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Correspondence to Hyeon Gyu Lee.

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Gu, Z., Lee, K.Y. & Lee, H.G. Changes in quality characteristics of tofu with freezing treatment of soybeans. Food Sci Biotechnol 25, 757–761 (2016). https://doi.org/10.1007/s10068-016-0129-0

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Keywords

  • tofu
  • soybean
  • freezing treatment
  • textural properties
  • sensory evaluation