Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Effects of Drying Method and Medicinal Herb Extract Addition on the Microstructure of Beef Jerky

건조방법과 한약재 추출물 첨가가 육포의 미세구조에 미치는 영향

  • Park, Chu-Ja (Faculty of Herbal Food Cuisine & Nutrition, Daegu Haany University) ;
  • Kim, Mi-Lim (Faculty of Herbal Food Cuisine & Nutrition, Daegu Haany University) ;
  • Park, Chan-Sung (Faculty of Herbal Food Cuisine & Nutrition, Daegu Haany University)
  • 박추자 (대구한의대학교 한방식품조리영양학부) ;
  • 김미림 (대구한의대학교 한방식품조리영양학부) ;
  • 박찬성 (대구한의대학교 한방식품조리영양학부)
  • Published : 2009.12.30
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Abstract

We investigated the effects of manufacturing method on the quality of beef jerky using electron micrography. Six types of beef jerky were prepared by the addition of sugar (A), licorice (B), one of three kinds of spice extract (clove: C, fennel fruit: D, and Chungyang green pepper extract: E), or a mixture of all spice extracts (F). Microstructural changes in beef jerky during preparation by drying, with respect to drying method and the nature of the added spice extract, were observed by scanning electron micrography (SEM) and transmission electron micrography (TEM). The latter technique showed that the microstructure of fresh meat showed actin and myosin in myofibril lines, and also mitochondria and inner membranes. Beef muscle structure was broken at many myofibril lines and decomposition of inner membrane material was evident after seasoning. SEM of air-blast dried beef jerky with added medicinal herb extracts showed both large spaces and regular myofibrils, whereas hot air-dried beef jerky had no spaces and the muscle myofibrils were still evident. After review of all available micrographs from SEM and TEM, we concluded that use of medicinal herb extracts could be helpful in preserving the muscle myofibril structure during drying, and the air-blast drying method is recommended to optimize the textural quality characteristics of beef jerky.

본 연구의 목적은 육포의 제조방법이 품질특성에 미치는 영향을 규명하기 위하여 기본 양념(간장, 물엿, 참기름, 정종, 마늘, 양파, 배즙)에 설탕(A), 감초(B), 3종류의 향신료(정향;C, 회향;D, 청양고추;E) 추출물과 여러 추출물을 혼합 첨가(F)한 6군으로 나누어 쇠고기를 절인후, 열풍건조와 송풍건조하는 육포의 제조과정에서 근육의 미세구조 변화를 주사전자현미경(SEM)과 투과전자현미경(TEM)으로 관찰하였다. 투과전자현미경(TEM)으로 관찰한 결과, 쇠고기는 액틴과 미오신의 근육라인과 근원섬유가 평행으로 발달되어 있었고 세포의 미토콘드리아와 내막을 볼 수 있었으나 절임과정에서 근섬유가 절단되고 근육라인의 분해 및 세포 구조물들의 퇴행이 일어났다. 주사전자현미경(SEM)으로 관찰한 결과, 자연건조한 한약재 추출물 첨가 육포는 근원 섬유와 공간구조가 남아있고 육질이 보존되어 있었으나 열풍건조한 육포는 근원섬유의 배열과 공간구조가 전혀 관찰되지 않았다. 이상의 주사전자현미경과 투과전자현미경으로 육포의 미세구조를 관찰한 결과에서 한약재 추출물은 근섬유의 결을 보존하는데 도움이 되며 송풍건조는 열풍 건조에 비하여 육포의 물성을 좋게 함으로써 품질을 향상시킬 수 있는 건조방법으로 생각된다.

Keywords

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