한국식품저장유통학회지 (Food Science and Preservation)

  • 제24권7호
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  • Pages.965-974
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  • 2017
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  • 3022-5477(pISSN)
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  • 3022-5485(eISSN)
한국식품저장유통학회 (The Korean Society of Food Preservation)
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쌀귀리 가루의 입도별 이화학적 특성 및 항산화 활성

Effect of particle size of naked oat flours on physicochemical and antioxidant property

  • Jun, Hyun-Il (Department of Food Science and Technology, Chonbuk National University) ;
  • Yoo, Sun-Hee (Agricultural Technology Center) ;
  • Song, Geun-Seoup (Department of Food Science and Technology, Chonbuk National University) ;
  • Kim, Young-Soo (Department of Food Science and Technology, Chonbuk National University)
  • 투고 : 2017.11.09
  • 심사 : 2017.11.23
  • 발행 : 2017.11.30
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초록

본 연구에서는 영양학적 가치가 높은 쌀귀리의 식품산업 이용률을 높이고자 쌀귀리를 입도별로 제조하여 이들의 이화학적 특성 및 항산화 활성을 비교하였다. 쌀귀리의 조단백질, 조지방 및 조회분 함량이 각각 15.7%, 10.0% 및 1.8%이었으며, 입도가 작아질수록 이들의 함량은 감소하였다. 주요 유리아미노산은 비필수아미노산 중에서는 cystine(58.3 mg%), ${\beta}$-aminoisobutyric acid(53.8 mg%) 등, 필수아미노산 중에서는 phenylalanine(8.6 mg%)과 histidine (12.2 mg%)이었으며, 입도가 작아질수록 함량은 감소하였다. 총 전분, 아밀로스, 손상전분, 총 식이섬유, ${\beta}$-glucan 및 총 유리당 함량은 각각 56.4%, 21.4%, 11.7%, 11.0%, 4.7% 및 2,555.3 mg%이었으며, 입도가 작아질수록 총 전분, 아밀로스 및 손상전분의 함량은 감소한 반면에 총 식이섬유와 ${\beta}$-glucan의 함량은 증가하였다. 색도는 L 값이 75.3, a 값이 0.3 및 b 값이 13.1이었으며, 입도가 작아질수록 L 값은 증가하였으나 a와 b 값은 감소하였다. 호화특성은 최고점도가 263.8 RVU, 최저점도가 155.6 RVU 및 최종점도가 399.3 RVU이었으며, 입도가 작아질수록 최고점도와 최종점도는 증가하였다. TPC, TFC 및 항산화 활성(DPPH radical assay, ABTS radical cation assay 및 reducing power)은 각각 $237.8{\mu}g/g$, $90.9{\mu}g/g$, 57.3%, 53.4% 및 0.23이었으며, 입도가 작아질수록 항산화 성분 및 항산화 활성은 감소하였다. 한편 TPC와 TFC에 관한 각 항산화 활성의 결정계수(correlation determination coefficient, $R^2$) 값이 각각 0.87 이상과 0.81 이상으로 나타나 항산화 성분과 항산화 활성은 상관성을 보였다.

This study was carried out to investigate the effect of particle size of naked oat flour (NOF) on physicochemical property and antioxidant activity. The NOF was passed through $250{\mu}m$ and $160{\mu}m$ size sieves to obtain three fractions (fraction A: $250{\mu}m$ or more, fraction B: $160-250{\mu}m$, and fraction C: $160{\mu}m$ or less). Moisture, crude protein, crude fat, and crude ash contents of NOF were 8.4, 15.7, 10.0, and 1.8%, respectively, and these contents were increased as the particle size of NOF decreased. The mineral and free amino acid contents of NOF also had a similar tendency. The contents of total starch, amylose, starch damage, total dietary fiber, ${\beta}$-glucan, total phenolics, and flavonoids in NOF were 56.4%, 21.4%, 11.7%, 11.0%, 4.7%, $237.8{\mu}g/g$ and $90.9{\mu}g/g$, respectively. As the particle size of NOF decreased, total starch, amylose, and starch damage contents increased, whereas total dietary fiber, ${\beta}$-glucan, total phenolic and flavonoid contents decreased. Also, three antioxidant activities of NOF were closely correlated with their total phenolics and flavonoids contents, showing high correlation coefficient values ($R^2=0.87$ and 0.81, respectively).

키워드

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피인용 문헌

  1. Bread-making properties of rice bread added with naked oat flours vol.26, pp.1, 2017, https://doi.org/10.11002/kjfp.2019.26.1.68
  2. Nutritional composition and physicochemical properties of oat flour sieving fractions with different particle size vol.154, pp.None, 2017, https://doi.org/10.1016/j.lwt.2021.112757