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Quality Characteristics and Antioxidant Activities of Cookies containing Teff (Eragrostis tef) Flour

Teff (Eragrostis tef) 분말을 첨가한 Gluten-free 쿠키의 품질 특성 및 항산화 활성 비교

  • 정기영 (고려대학교 식품영양학과) ;
  • 송가영 (고려대학교 식품영양학과) ;
  • 오현빈 (고려대학교 식품영양학과) ;
  • 장양양 (고려대학교 식품영양학과) ;
  • 신소연 (고려대학교 식품영양학과) ;
  • 김영순 (고려대학교 식품영양학과)
  • Received : 2017.01.13
  • Accepted : 2017.05.22
  • Published : 2017.06.30

Abstract

This study investigated the quality characteristics and antioxidant activities of gluten-free cookies containing teff flour. By substituting 0% (control), 25% (TF25), 50% (TF50), 75% (TF75), and 100% (TF100) of wheat flour with teff flour, five samples were produced. Baking loss rate was the highest in TF25 at 13.76% and the lowest in TF75 at 4.03%. Spread factor was significantly higher in cookies made with teff flour (83.00~85.00) than in the control (81.33) (p<0.05). There was no significant difference in density among the samples at 1.17~1.25 g/mL (p<0.05); however, pH significantly decreased at 6.42~6.04 (p<0.05). While the L-value and b-value significantly decreased with the amount of teff flour, the a-value significantly increased (p<0.05). The ${\Delta}E$ value was the highest in the control at 31.31 and the lowest in TF100 at 58.69. Hardness was the highest in the control at 42.04 N than in cookies containing teff flour. The content of polyphenols was the highest in TF100 at $3.37{\mu}g\;GAE/mg$ and the lowest in the control at $1.32{\mu}g\;GAE/mg$. The content of flavonoids was the highest in TF100 at $3.66{\mu}g\;QE/mg$ and the lowest in controls at $0.45{\mu}g\;QE/mg$. The value of DPPH $IC_{50}$ was the highest in the control at $3,723.00{\mu}g/mL$ and the lowest in TF 100 at $405.27{\mu}g/mL$. The value of ABTS $IC_{50}$ was the highest in the control at $1,822.32{\mu}g/mL$ and the lowest in TF100 at $529.30{\mu}g/mL$. In sensory evaluation, while control, TF75, and TF100 had a higher score in appearance at 5.52~5.60, all samples had no significant differences in flavor, sweetness, savory taste, chewiness, and overall acceptability (p<0.05). These results showed that the gluten-free cookies containing teff flour can improve the quality characteristics and antioxidant activities of a cookie. We concluded that gluten-free cookies containing 100% teff flour are desirable.

Keywords

References

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