• 한국식품조리과학회지
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• 제20권5호
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• pp.511-519
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• 2004

The optional ingredient, Maesil juice, was adopted to improve the quality of Yulmoo Mul-Kimchi during fermentation. The final weight of the Maesil juice as a percentage of the water content in the Yulmoo Mul-Kimchi was adjusted to 0, 1, 3, 5 and 7%. The physicochemical, microbiological and sensory characteristics were determined during fermentation at 10$^{\circ}C$ over a 30 days period. After fermentation, the additions of 3 and 5% Maesil juice gave the highest pH values and lowest total acidities. With regard to the reducing sugars, the 3 and 5% treatments gave the highest contents. The number of the total cell count and lactic acid bacteria increased to their maxima during fermentation, but began to decrease during the latter stages. Here, the additions of 3 and 5% Maesil juice showed distinctive lower and higher numbers of total cells and lactic acid bacteria, respectively, during the latter stages of fermentation. With regard to the sensory evaluation on the addition of Maesil juice, the results obtained with 3 and 5% additions to the fermented Yulmoo Mul-Kimchi were favored for color, smell, sour and carbonated tastes and overall acceptability of the products. Therefore, the optimum levels of Maesil juice addition to Yulmoo Mul-Kimchi were estimated to be between 3 and 5%.

• 한국식품과학회지
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• 제36권2호
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• pp.329-332
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• 2004

매실즙, GMT, 아스파르트산의 ADH 및 ALDH의 활성에 미치는 영향을 in vitro에서 조사하였다. 매실즙 및 GMT, 아스파르트산의 ADH의 활성에 미치는 효과는 반응 후의 최대 흡광도와 효소의 반응 속도를 통하여 분석하였다. 최대 흡광도의 경우 모든 실험구에서 유의적인 상승 효과를 나타냈으며 대조구의 최대 흡광도를 100으로 하였을 때 매실즙, GMT(5, 10, 15%), 아스파르트산(0.5, 1.0%)의 값은 각각 137.9, 131.6, 153.0, 218.7, 111.8, 144.3으로 나타났다. 매실즙과 GMT 및 아스파르트산을 혼합하여 이들의 ADH 효소 활성에 대한 상승효과를 조사한 결과 모든 실험구에서 유의적인 상승효과를 나타냈으며 이중 매실즙과 10% GMT 혼합 첨가군에서 가장 높은 상승효과를 나타냈다. ALDH 효소 활성도의 증가수준을 비교해보면 매실즙 첨가군이 가장 증가정도가 높았고 그 다음이 ALDH를 첨가한 경우 였으며 GMT, 아스파르트산의 순으로 활성 증가를 나타냈다. 매실즙의 경우 효소만 첨가한 대조구의 흡광도의 값을 100%로 보았을 때 매실즙 첨가군의 값은 976.4%로 나타나 ALDH의 활성이 10배 가까이 증가되는 양상을 나타내어 매실즙의 숙취해소 식품으로의 개발 가능성을 나타내었다.

• 한국식품조리과학회:학술대회논문집
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• 한국식품조리과학회 2005년도 추계학술대회 및 정기총회
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• pp.56-65
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• 2005

This study was purposed to investigate the antioxidative effects, the enzyme activity of the alcohol metabolizing and melanin production of Maesil(Prune mume). The antioxidant activity of Maesil(Prunu mume) was analyzed by measuring thiobarbituric acid reactive substances(TBARS value) and electron donating ability. And we investigated the changes of alcohol dehydrogenase(ADH) and acetaldehyde dehydrogenase(ALDH) activity by measuring the maximum absorbency at 340nm in vitro and human study. The inhibitory effects of Maesil were investigated in vitro and in B-16mouse melanoma cells on melanin biosynthesis that is closely related to hyperpigmentation. The antioxidant activities for TBA values were 29.65% in ascorbicacid, 45.35% in BHT, 15.99% in extract of dehydrated maesil flesh(EDMF) and 25.00% in extract of dehydrated maesil juice(EDMJ). The electron donating abilities by DPPH were 96.69% in ascorbic acid, 77.82% in BHT, 34.25% in EDMF, and 42.99%in EDMJ. Electron donating abilities by DPPH in the presence of 0.02% EDMF and EDMJ were 53.21% and 59.19% respectively. Facilitating rates of ADH activity were 137.92, 131.58, 152.96, 218.70, 111.76, and 144.27% in maesil juice, 5, 10, and 15% GMT, and 0.5 and 1.0% aspartic acid, respectively. ALDH activity increased in the order of Maesil juice > ALDH > GMT > aspartic acid, and facilitating rate of ALDH activity in Maesil juice was the highest at 976.44%. Maesil extracts inhibited tyrosinase activity that converts dopa to dopachrome in the biosynthesis process. B-16 cells treated by Maesil extracts showed that the viability was over 80%. Maesil and maesil products in vitro and B-16 cells inhibited melanin production significantly.

• 한국식품위생안전성학회지
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• 제23권1호
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• pp.62-67
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• 2008

국내산 과일 주스 4종을 준비하고 식중독 유발균인 Listeria monocytogenes와 Salmonella Typhimurium를 접종하여 14일 동안 $4^{\circ}C$에서 보관하며 항균 효과를 살펴본 결과 다음과 같은 결론을 얻었다. L. monocytogenes 에서는 매실 주스가 가장 뛰어난 효과를 나타내어 보존 14일만에 생존하고 있는 균을 전혀 측정할 수 없었으며, 그 다음으로 키위가 3.0 log만큼 억제를 보이는 항균 효과를 나타내었다. 감귤의 경우 1.0 log만큼 억제하는데 그쳤다. 매실주스 10%를 다른 주스에 혼합하였을 때 L. monocytogenes는 키위 즙에서 더욱 향상된 항균 효과를 나타내어 14일 후 생존 균을 측정할 수 없었고, 감귤주스에서도 1.5 log 만큼의 향상된 항균 효과를 나타내었다. S. Typhimurium은 전반적으로 L. monocytogenes 보다 더 쉽게 억제되는 경향을 보였다. 키위 즙과 매실 주스에서 접종한 모든 균이 보존 14일 후 생존하지 않는 것으로 관찰되었으며, 감귤의 경우에는 1.4 log 만큼밖에 억제하지 못했다. 10%의 매실과 혼합된 주스에 S. Typhimurium을 접종한 결과 키위 즙에서는 접종한 전 균이, 감귤주스에서는 3.2 log 만큼의 증가된 억제효과를 나타내었다. 이상과 같은 결과로 볼 때, 매실은 식중독 유발균에 대한 강한 항균 활성을 가지고 있으며 다른 과실주스에서의 식중독을 예방하기 위한 식품 보존 첨가제로서 사용이 가능할 것으로 기대된다.

• 동아시아식생활학회지
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• 제19권6호
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• pp.981-986
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• 2009

The quality characteristics and antioxidative activity of garlic pickles prepared with persimmon vinegar with or without Maesil (Japanese apricot) juice were investigated. Heat treated garlic cloves ($110^{\circ}C$, 5 min and then rapidly cooling) were salted with NaCl and $CaCl_2$, and then soaked in pickling solution, and stored at $20^{\circ}C$. The pH of the garlic pickles initially ranged from 2.36~3.24, after which the pH slightly increased to 3.22~4.13 during storage, while the acidity was decreased to 1~1.97. Throughout the entire storage periods, the acidity of the garlic pickle containing persimmon vinegar and Maesil was the highest (1.97%). The hardness of the control sample (non heated garlic) decreased during storage, whereas the hardness of all the heat treated groups did not change after 21 days of storage. Moreover, the chewiness of the persimmon vinegar+Maesil group was the highest among the groups. The Hunter color L value of garlic pickles decreased during storage, while the b value (yellowness) increased for all groups except the two persimmon groups. The $IC_{50}$ of the DPPH radical scavanging activity of garlic pickles at 5 day of storage was 85.98~97.81 mg/mL. However, the antioxidative activity of garlic pickles gradually increased with longer storage times. The persimmon vinegar+Maesil group showed the highest antioxidative activity. Results from the sensory evaluation showed that scores of flavor, taste and over-all preference were higher for the persimmon vinegar+Maesil group than the other groups (p<0.05).

• 한국식생활문화학회지
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• 제21권4호
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• pp.420-425
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• 2006

This study was conducted to produce vinegar using maesil. Acetic acid bacteria was 20 strains isolated from several conventional vinegars. Among the isolates, a strain showed highest acetic acid productivity was selected and identified as Acetobacter sp. SK-7. The optimum medium of acetic acid production by Acetobacter sp. SK-7 was 30% of maesil juice, 4% of ethanol, and 2% of starting acidity and 0.2% of glucose. Optomum condition for the high yield of acetic acid was in the shaking culture at 30$^{\cire}$. The acidity of culture medium was reached to 7.1% after 12 days fermentation. Organic acid was identify 6 kinds containing acetic acid. The total content was 7,068.7 mg% after 12 days and malic acid slowly decreased and acetaic and citirc acid gradationally increased according to fermentation

• 한국식품영양과학회지
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• 제25권4호
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• pp.695-700
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• 1996

매실즙을 이용한 식초생산을 위하여 초산생성능이 우수한 초산균을 재래초로 부터 분리, 동정하고 매실 초 제조를 위한 최적 발효조건을 검토하였다. 재래초로부터 분리한 16균주 중 매실즙배지에서 가장 초산 생성능이 우수한 균주로 선정된 균주는 Acetobuter sp. VC-2로 동정 되었다. 이 균주의 증식 최적 조건을 살펴본 결과, 최적 온도는 3$0^{\circ}C$였으며 정치배양 보다는 진탕배양이 효과적으로 나타났다. 초산생성에 적합한 배지의 조성은 매실즙 30%, 초기 산도 2%, 에탄을 농도 6%, 포도당 0.2%, yeast extract 0.3%가 함유된 배지였다. 이와 같은 배양조건에서 매실식초는 8일째에 발효가 거의 완료되었으며, 이때 얻은 매실초의 총 산도는 6.5%였다. 주요 유기산으로는 acetic acid, citric acid, malic acid 및 tartaric acid였는데, 이들 함량은 4.28, 1.38, 0.48 및 0.30%로 각각 나타났다.

• 한국식품과학회지
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• 제32권5호
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• pp.1087-1092
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• 2000

두부 제조를 위한 응고제로 오미자즙과 매실즙을 이용하여 적정 제조조건, 텍스쳐, 색도, 기호성 및 저장성을 검토하였다. 오미자두부는 가수량 12.5배, 두미 가열시간 5.0분, 오미자즙 첨가량 0.9% 일 때, 매실두부는 가수량 10.0배, 두미 가열시간 5.0분, 매실즙 첨가량을 1.5%로 하여 제조하였을 때 가장 높은 수율을 나타내었다. 오미자즙과 매실즙 두부의 물성은 $CaSO_4$로 응고시킨 두부 보다 견고성, 부착성, 씹힘성, 검성이 낮았으나 관능특성은 맛, 색, 향, 조직감 모두 우수하였다. 두부 저장 중 침지액의 pH는 증류수의 경우 저장초기에는 낮아졌다가 높아졌으며 침지액의 탁도는 증류수 및 0.1% acetic acid 모두 저장기간이 길어질수록 증가되었는례 특히 과즙 두부가 $CaSO_4$ 두부 보다, 0.1% acetic acid 침지액이 증류수 보다 pH와 탁도가 낮았다. 두부의 세균수는 저장기간이 길어질수록 지수적으로 증식되었는대 응고제로 과즙 두부가 $CaSO_4$두부 보다, 침지액으로 0.1% acetic acid용액이 증류수보다 세균의 증식이 지연되어 과즙두부를 0.1% acetic acid용액에 침지하였을 매 저장성 향상 효과가 있었다.

• 한국식생활문화학회지
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• 제18권5호
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• pp.428-436
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• 2003

The effect of addition with maesil(Prunus mume) juice for extending the shelf-life of wet noodle was investigated by measuring quality changes such as total microbial count and pH. The Prunus mume juice showed antimicrobial activities against Salmonella enteritidis, Staphylococcus aureus, Bacillus cereus, Listeria monocytogenes, and Escherichia coli. When the wet noodles containing Prunus mume juice were kept at $4^{\circ}C$ for 20 days, it was showed that the drop of pH was not significantly occurred during the storage. Total microbial counts for control exceeded the initial putrefactive criterion level of $1.0{\times}10^6\;cfu/g$ at 16 days of storage at $4^{\circ}C$. However, total microbial count of wet noodles with the addition of 10%, 20% and 30% Prunus mume juice were $3.0{\times}10^2\;cfu/g,\;3.0{\times}10^2\;cfu/g,\;and\;1.5{\times}10^2\;cfu/g$, respectively, and these bacterial counts were still less than the criterion level ever at 20 days of storage. The addition of Prunus mume juice extended the shelf-life of wet noodle appreciably.

• 한국식품영양학회지
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• 제21권4호
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• pp.391-396
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• 2008

In this study, we attempted to optimize the fermentation processes in the production of lactic acid juice with 20% Maesil(Prunus mume) extract using Lactobacillus plantarum isolated from Kimchi, assessing a variety of pH, temperature, sugar compositions, and sugar concentrations. In the preparation of fermented Maesil(Prunus mume) extract, the optimal pH and fermentation temperature were 4.0 and $35^{\circ}C$, respectively. When the effects of various sugar sources and concentrations on lactic acid fermentation were assessed, 15% fructose was shown to yield more acid productivity than was observed with other sugar sources. The optimum composition, on the basis of our sensory evaluations, was determined to be a fructose concentration of 15% and a fermentation time of $72{\sim}96$ hours.