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Quality Characteristics of Pre-processed Garlic during Storage according to Storage Temperature

마늘의 유통 형태에 따른 저장 중 품질 특성

  • Park, Young-Hee (National Academy of Agricultural Science, Rural Development Adminstration) ;
  • Park, Soo-Jin (National Academy of Agricultural Science, Rural Development Adminstration) ;
  • Han, Gwi-Jung (National Academy of Agricultural Science, Rural Development Adminstration) ;
  • Choe, Jeong-Sook (National Academy of Agricultural Science, Rural Development Adminstration) ;
  • Lee, Jin-Young (National Academy of Agricultural Science, Rural Development Adminstration) ;
  • Kang, Min-Sook (National Academy of Agricultural Science, Rural Development Adminstration)
  • 박영희 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 박수진 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 한귀정 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 최정숙 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 이진영 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 강민숙 (농촌진흥청 국립농업과학원 농식품자원부)
  • Received : 2012.03.14
  • Accepted : 2012.05.29
  • Published : 2012.07.31

Abstract

Quality changes of pre-processed garlic, peeled and chopped, were analyzed during storage at $-18^{\circ}C$ or $2^{\circ}C$ for 30 days and at $20^{\circ}C$ for 3 days only for chopped garlic. As storage time increased, Hunter L values decreased and a, b values increased, indicating browning regardless of the pre-process type and storage temperature. Decay and sprouting rates of peeled garlic during storage at $2^{\circ}C$ significantly increased while those of peeled garlic were maintained during storage at $-18^{\circ}C$. Weight loss of peeled garlic during storage was greater at $-18^{\circ}C$ than at $2^{\circ}C$. Hardness of peeled garlic rapidly decreased by half from 1.04 kg to 0.58 kg by freezing, and it did not significantly change during the storage period. Viable numbers of total aerobic bacteria of peeled and chopped garlic did not significantly change during the storage period at $2^{\circ}C$ but were reduced at $-18^{\circ}C$. Total aerobic bacterial count of chopped garlic stored at $20^{\circ}C$ slightly increased during the storage period. Pyruvic acid content of chopped garlic was almost 2.5 times higher than that of peeled garlic at the initial stage (463.87 ${\mu}mol/g$ and 190.52 ${\mu}mol/g$, respectively). As storage time increased, pyruvic acid content of peeled garlic increased while that of chopped garlic decreased. These results indicate that pre-process type and storage temperature affected the quality changes of garlic during storage.

시중에 유통되고 있는 전처리 가공된 마늘의 저장 중 품질 특성 변화를 알아보고자 깐 마늘과 다진 마늘을 구입하여 냉장($2^{\circ}C$), 냉동($-18^{\circ}C$) 온도에서 30일간 저장하면서 품질 특성을 조사하였다. 또한 다진 마늘은 상온($20^{\circ}C$)에서 3일간 품질 특성 조사를 실시하였다. 깐 마늘과 다진 마늘의 색도는 저장기간이 경과할수록 L값은 감소하고 a, b값은 증가하여 갈변화가 진전됨을 나타내었다. 깐 마늘의 중량감모율은 저장기간에 따라 유의하게 증가하였으며, 냉동저장구의 증가율이 냉장저장구에 비해 높았다. 부패율과 맹아율은 냉동저장구에서는 거의 발생하지 않았으며 냉장저장구는 유의하게 증가하였다. 깐 마늘의 경도는 냉동에 의해 급속히 감소하였으나, 냉장 및 냉동온도에서 저장기간에 따른 차이는 없었다. 냉동저장 한 깐 마늘과 다진 마늘의 드립로스 또한 저장기간 경과에 따른 유의한 변화를 보이지 않았다. 냉장저장 한 깐 마늘과 다진 마늘의 총 세균수는 저장기간에 따른 유의한 변화를 보이지 않았으며, 냉동저장의 경우에는 감소하는 경향을 보였다. 반면 상온저장 한 다진 마늘의 총 세균수는 서서히 증가하는 경향을 보였다. 마늘의 풍미 성분 지표인 pyruvic acid는 다진 마늘의 저장 전 함량이 깐 마늘보다 높았다. 저장기간 동안 깐 마늘의 pyruvic acid는 증가하였으며 다진 마늘은 감소하는 것으로 나타났으며, 냉장저장이 냉동저장보다 변화폭이 더욱 크게 나타났다. 위의 실험결과 전처리 가공 형태 및 저장온도가 저장기간 동안 마늘의 품질 특성 변화에 영향을 미치는 것을 알 수 있었고, 마늘의 품질유지를 위해 적절한 저장온도 설정 및 관리가 필요한 것으로 사료되었다.

Keywords

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