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수분함량을 달리하여 제조한 볶음 옥수수차의 품질 및 항산화 특성

Quality and Antioxidant Characteristics of Roasted Maize Tea with Different Moisture Contents

  • 이지혜 (농촌진흥청 국립식량과학원 중부작물부) ;
  • 김현주 (농촌진흥청 국립식량과학원 중부작물부) ;
  • 김미정 (농촌진흥청 연구정책국) ;
  • 정건호 (농촌진흥청 국립식량과학원 중부작물부) ;
  • 이병원 (농촌진흥청 국립식량과학원 중부작물부) ;
  • 이병규 (농촌진흥청 국립식량과학원 중부작물부) ;
  • 우관식 (농촌진흥청 국립식량과학원 중부작물부)
  • Lee, Ji Hae (Dept. of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Hyun-Joo (Dept. of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Mi Jung (Research Policy Bureau, Rural Development Administration) ;
  • Jung, Gun-Ho (Dept. of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Byong Won (Dept. of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Byoung Kyu (Dept. of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Woo, Koan Sik (Dept. of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
  • 투고 : 2017.08.17
  • 심사 : 2017.09.12
  • 발행 : 2017.12.31

초록

We investigated the quality characteristics and the antioxidant efficacy of roasted maize tea according to different moisture contents (9% to 14%) using the puffing system (PS) and the roasting system (RS). Compared with the RS, the PS caused higher turbidity (0.017 vs. 0.003 in PS-14% vs. RS-14%), brown color intensity (0.170 vs. 0.059 in PS-14% vs. RS-14%), a-values (0.20 vs. -0.44 in PS-14% vs. RS-14%), b-values (7.90 vs. 5.57 in PS-14% vs. RS-14%), and a lower L-value (19.67 vs. 21.03 in PS-14% vs. RS-14%). Total polyphenol and flavonoid contents of roasted maize tea were increased along with the moisture content and they were higher with the PS (polyphenol; 5.95 mg GAE/g, flavonoids; 1.27 CE/g in PS-14%) than with the RS (polyphenol; 5.39 mg GAE/g, flavonoids; 1.12 mg CE/g in RS-14%). The DPPH and ABTS radical scavenging effects of roasted maize tea were also increased along with the moisture content, and the scavenging efficacy was significantly higher with the PS (DPPH; 160 mg TE/100g, ABTS; 507 mg TE/100g in PS-14%) compared with the RS (DPPH; 120 mg TE/100g, ABTS; 362 mg TE/100g in RS-14%). The polyphenol levels were significantly correlated with turbidity, brown color intensity, and L, a, and b-values of the roasted maize tea. In addition, an increase of the total polyphenol content in roasted maize tea induced antioxidant activities. As a result, an increase in polyphenols during the roasting process induced antioxidant activities which could prevent damage from free radicals.

키워드

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