Characteristics of the Stored Samjangs with Different Doenjangs

원료된장을 달리하여 제조한 저장쌈장의 품질특성

Samjangs which were prepared using magjang, traditional doenjang, and mixture of traditional doenjang and magjang were stored. Characteristics of the stored samjangs were investigated. Maximum titratable acidity was shown in traditional doenjang after 30 day of storage. Total sugar in samjangs decreased while reducing sugar increased to $11.45{\sim}12.35%$ from $8.44{\sim}9.29%$ after 40 days. Amino type nitrogen predominantly increased to $337.3{\sim}381.1\;mg%$ after 40 days from $48{\sim}53\;mg%$ of initial period of preparation. Among the free amino acids the content of glutamic acid $(202.6{\sim}464.6\;mg/100g)$ was highest and others were not too much changed. Forty two components including 7 alcohols, 4 esters, 13 acids, 6 aldehydes, 5 phenols, 3 pyrazines and others were found in samjangs. Ethanol, acetic acid ethyl ester and 2-phenylethanol were found in all treatments and ethanol, acetic acid ethyl ester, phenylacetaldehyde, butanoic acid, acetic acid, 3-methyl butanoic acid and 2,4-hexadienoic acid might be major volatile components considering of high peak area. 2-Phenylethanol, butandioic acid ethyl ester, butanoic acid and 2-methyl-2-butenoic acid were higher than other components in samjang with magjang while ethanol, acetic acid, 2,4-hexadienoic acid were in samjang with traditional doenjang and 3-methyl butanoic acid, acetic acid ethyl ester and methyl pentanoic acid were in the mixed treatment.

막장, 재래식 된장, 막장과 재래식의 혼용된장을 주원료로 제조한 저장쌈장의 품질특성을 검토한 결과 적정산도는 저장 30일 최대치를 보였고 재래식 된장구의 쌈장에서 높았다. 제조 직후에 비하여 저장쌈장의 총당은 감소, 환원당은 증가 경향을 보여 저장 40일에 총당 $16.52{\sim}19.58%$, 환원당 $11.45{\sim}12.35%$로 당함량이 높은 특색을 보였다. 아미노태질소는 제조 직후 $45.0{\sim}53.0\;mg%$였으나 40일에 $337.3{\sim}381.1\;mg%$로 현저히 증가하였고 혼용구의 쌈장이 높은 경향을 보였다. Glutamic acid는 $202.6{\sim}464.6\;mg/100g$으로 저장쌈장에서 가장 높은 함량을 보였고, 함량이 높은 glutamic acid, tryptophane, alanine, cystine은 혼용구, 재래식 된장구, 막장구의 쌈장순으로 높았다. 40일 저장 쌈장에서 alcohol류 7종, ester류 4종, aldehyde류 6종, acid류 13종 등 총 42종의 휘발성 향기성분이 동정되었다. 모든 시험구에서 검출된 향기성분은 ethonol, acetic acid ethylester, 2-phenylethanol등 10종이었다. Ethanol, acetic acid ethyl ester, phenylacetaldehyde, acetic acid, butanoic acid, 3-methylbutanoic acid, 2,4-hexadienioc acid의 면적비율이 높아 쌈장의 주향기성분이었다. 막장구의 쌈장에서는 2-phenylethanol, butandioic acid ethyl ester, butanoic acid, 2-methyl-2-butenoic acid가, 재래식된장구의 쌈장에서 ethanol, acetic acid, 2,4-hexadienioc acid, 혼용구의 쌈장에서는 acetic acid ethyl ester, 3-methylbutanoic acid, methyl pentanoic acid의 면적 비율이 각각 타시험구보다 높았다.