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The Effects of Salt and NaNO2 on Fatty Acid Composition, Free Amino Acids, Microbial Counts and Sensory Characteristics of Dry-cured Ham Processed under Korean Environment

소금과 아질산염 처리수준이 자연숙성 건염햄의 지방산 조성, 유리아미노산, 미생물수 및 관능적 특성에 미치는 영향

  • 성필남 (농촌진흥청 국립축산과학원) ;
  • 김진형 (농촌진흥청 국립축산과학원) ;
  • 조수현 (농촌진흥청 국립축산과학원) ;
  • 강동우 (농촌진흥청 국립축산과학원) ;
  • 강근호 (농촌진흥청 국립축산과학원) ;
  • 박범영 (농촌진흥청 국립축산과학원) ;
  • 이종문 (농촌진흥청 국립축산과학원) ;
  • 정재홍 (안산공과대학 호텔조리과) ;
  • 김동훈 (농촌진흥청 국립축산과학원)
  • Received : 2010.02.17
  • Accepted : 2010.04.21
  • Published : 2010.06.30

Abstract

The study analyzed the effects of salt concentration [high salt (HS) and low salt (LS)] and sodium nitrite ($NaNO_2$), which are typically utilized in Korean processing facilities, on fatty acid composition, free amino acids, microbial counts and sensory characteristics of processed dry-cured ham. Four different treatments were considered: three hams (11.30 kg) salted with 92 g/kg salt (w/w) (HS), three hams (10.65 kg) treated with HS and 100 ppm $NaNO_2$ (HS+$NaNO_2$), three hams (11.42 kg) salted with 62 g/kg salt (w/w) (LS), and three hams (10.62 kg) treated with LS and 100 ppm $NaNO_2$ (LS+$NaNO_2$). Fatty acid composition analysis revealed significantly (p<0.05) higher saturated fatty acid and lower (p<0.05) unsaturated fatty acid in the HS+$NaNO_2$ group compared with the other groups. Glutamate, alanine and lysine free amino acids were higher than the other free amino acids. The processing conditions did not significantly affect the free amino acids of biceps femoris muscles, except for the proline content (p>0.05). In sensory evaluation, the fermentation aroma of the LS group was higher than that of the HS group. The aerobic counts consistently ranged from from $2.3{\times}10^2$ to $1.11{\times}10^4$ CFU/g. Escherichia coli including strain O157:H7, Staphylococcus aureus, and Salmonella spp. were not detected.

Keywords

salt;$NaNO_2$;dry-cured ham;fatty acid;free amino acid

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