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Comparative Analysis of Nutritional and Harmful Components in Korean and Chinese Mealworms (Tenebrio molitor)

국산 및 중국산 갈색거저리(Tenebrio molitor)의 영양성분 및 유해물질 비교분석

  • Yoo, Jeongmi (Dept. of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Hwang, Jae-Sam (Dept. of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Goo, Tae-Won (Dept. of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Yun, Eun-Young (Dept. of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration)
  • 유정미 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 황재삼 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 구태원 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 윤은영 (농촌진흥청 국립농업과학원 농업생물부)
  • Received : 2012.08.31
  • Accepted : 2013.01.14
  • Published : 2013.02.28

Abstract

As part of a study on insects as food, the nutritional and harmful components in the mealworm (Tenebrio molitor) were analyzed. In addition, due to a recent introduction of live Chinese mealworms in the Korean market, components between Korean and Chinese mealworms were compared. Analysis of general composition (moisture, crude protein, crude fat, crude ash, crude fiber, and carbohydrates) showed that crude protein (50.32~52.79%) was abundant in both Korean and Chinese mealworm powders, with the protein content in the Chinese mealworm powder higher than that in the Korean mealworm powder by 2.67%. The amino acid compositions were similar, but the fatty acid compositions differed in the Korean and Chinese mealworm powders. The unsaturated fatty acid contents were 76.80~80.55% of the total fatty acid content in the mealworms. The linoleic acid contents in the Korean and Chinese mealworms were $20.8{\pm}1.1%$ and $34.69{\pm}1.9%$; the linolenic acid contents were 0.47% and 1.31%; and the oleic acid contents were $51.40{\pm}0.9%$ and $40.20{\pm}1.5%$, respectively. With respect to harmful components, such as heavy metals and bacteria that cause food poisoning, bacteria such as Escherichia coli O157:H7 and Salmonella spp. were not detected in both Korean and Chinese mealworms, and the mercury content was below the standard values for common foods (Korea, 0.03 mg/kg; China, 0.08 mg/kg).

국산 및 중국산 갈색거저리 유충의 일반성분의 함량 분석 결과, 갈색거저리의 동결건조 분말은 고함량의 단백질(50.32~52.99%)을 포함하고 있었고, 중국산 분말이 약 2.67% 정도 국산에 비해 높은 단백질을 함유하고 있었다. 갈색거저리의 필수 및 비필수아미노산을 포함하고 있었고, 분석된 아미노산의 함량은 국산과 중국산이 비슷한 수준을 나타내었으며, 비필수아미노산 중 glutamic acid의 함량이 다른 아미노산에 비해 가장 높게 존재하였다. 지방산의 분석 결과, 갈색 거저리 분말은 총 지방산 중 76.80~80.55%의 많은 불포화 지방산을 함유하고 있었다. 불포화지방산 중 linoleic acid는 국산 $20.80{\pm}1.1%$, 중국산 $34.69{\pm}1.9%$로 13.89% 차이, oleic acid는 국산 $51.40{\pm}0.47%$, 중국산 $40.20{\pm}1.5%$로 11.2%의 차이, linolenic acid는 국산 0.5%, 중국산 1.4%로 명확한 함량 차이와 유의성(p<0.05)이 인정되었다. 유해물질인 식중독균(E. coli O157:H7, Salmonella spp.)은 국산과 중국산 분말 모두에서 검출되지 않았으며, 중금속 검사 결과에서 수은(Hg)이 국산과 중국산에서 각각 0.03 mg/kg, 0.08 mg/kg으로 검출되었으나 일반식품의 기준치 이하로 확인되었고 그밖의 중금속은 존재하지 않았다.

Keywords

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