• Journal of Microbiology and Biotechnology
• /
• 제32권4호
• /
• pp.458-463
• /
• 2022

We evaluated the antibiotic susceptibilities, hemolytic activities, and technological properties of 36 Staphylococcus xylosus strains and 49 S. pseudoxylosus strains predominantly isolated from fermented soybean foods from Korea. Most of the strains were sensitive to chloramphenicol, erythromycin, gentamycin, kanamycin, lincomycin, oxacillin, tetracycline, and trimethoprim. However, 23 strains exhibited potential phenotypic acquired resistance to erythromycin, lincomycin, and tetracycline. Based on breakpoint values for staphylococci from the Clinical and Laboratory Standards Institute, >30% of the isolates were resistant to ampicillin and penicillin G, but the population distributions in minimum inhibitory concentration tests were clearly different from those expected for acquired resistance. None of the strains exhibited clear α- or β-hemolytic activity. S. xylosus and S. pseudoxylosus exhibited salt tolerance on agar medium containing 20% and 22% (w/v) NaCl, respectively. S. xylosus and S. pseudoxylosus strains possessed protease and lipase activities, which were affected by the NaCl concentration. Protease activity of S. pseudoxylosus was strain-specific, but lipase activity might be a characteristic of both species. This study confirms the potential of both species for use in high-salt soybean fermentation, but the safety and technological properties of strains must be determined to select suitable starter candidates.

• Preventive Nutrition and Food Science
• /
• 제3권1호
• /
• pp.77-84
• /
• 1998

To evaluate food consumption patterns of first generation Korean-American in Hawaii, questionnaires were developed using sociodemographic questions and food frequency questionnaire, which included 139 food items most often consumed among Korean foods and American foods. The questionnaires surveyed 157 first generation Korean-Americans in Hawaii. Mean daily servings for the first generation Korean-Americans were calculated for 139 food items combined into 41 food groups based on similarity in nutrient composition and serving size. The food groups which were consumed in amounts over one serving per day for all subjects were rice, Kimchi , non-citrus fruit , vegetables, organge/green vegetables. oil. margarine and coffee/tea. All subjects consumed less than one serving of hotdogs, hamburgers, pizza and pancakes per week(0.14 serving per day). The most notable characteristic of food consumption for first generation Korean-Americans was that they consumed more Korean food such as rice, Kimchi, soybean paste(Deenjang), soybean curd and seaweed than American foods. Compared with other groups based on age and gender, younger men showed significantly(p<0.05) more frequent consumption of beef/pork, sausages /hams /bacons and hambergers. Older men were significantly(p<0.05) more likely to consume Doenjang and less likely to consume pizza and hamburgers. Daily servings were below the recommended level for thegrains /bread/cereals group and fats/oils/sweets group for all subjects . Fruits/vegetables group servings exceeded the recommeded 5 daily servings for younger men. In correlations of daily servings of selected foods among Korean foods and American food with sociodemographic characteristics, this study showed that the older the subjects and the shorter the stay in Hawaii, subjects were more likely to consume Kroean foods.

• Fisheries and Aquatic Sciences
• /
• 제23권1호
• /
• pp.2.1-2.6
• /
• 2020

Background: As the cost of fishmeal continues to rise, there will be a need to optimize the diet by minimizing dietary fishmeal inclusion in aquafeed. In this study, a 7-week experiment was conducted to evaluate soybean meal, fermented soybean meal (soytide), and sesame meal as fishmeal replacers in whiteleg shrimp, Litopenaeus vannamei. Methods: A 30%-based fishmeal diet was considered as control (CON), six other diets were prepared by replacing 20% or 40% of fishmeal with soybean meal (SB₂₀ and SB₄₀), fermented soybean meal (ST₂₀ and ST₄₀), or sesame meal (SM₂₀ and SM₄₀) from the CON diet. Twenty shrimp with average initial weight of 0.65 ± 0.05 g (mean ± SD) were randomly distributed into 21 tanks (45 L) and fed four times a day. Water temperature was controlled at 28 ± 1 ℃ and aeration was provided by air stones. Results: Weight gain, specific growth rate, feed efficiency, and protein efficiency ratio of shrimp fed CON showed no significant differences compared to shrimp fed all the other diets. However, growth performance of shrimp fed ST₂₀ diet was significantly higher than those of shrimp fed the SM₂₀ and SM₄₀ diets (P < 0.05). Superoxide dismutase activity (SOD) of shrimp fed CON, ST₂₀, and ST₄₀ diets was significantly higher than those of shrimp fed the SB₄₀ and SM₄₀ diets. But there were no significant differences among shrimp fed CON, SB₂₀, ST₂₀, ST₄₀, and SM₂₀ diets. Also, lysozyme activity of shrimp fed ST₂₀ diet was significantly higher than those of shrimp fed the SB₄₀ and SM₄₀ diets. Although, lysozyme activity of shrimp fed the CON diet was not significantly different compared to shrimp fed all the other experimental diets. Conclusions: Therefore, SB, ST, and SM could replace 40% of fishmeal based on growth performance and lysozyme. According to the SOD activity, SB and SM could replace 20% of fishmeal and ST could replace 40% of fishmeal in juvenile whiteleg shrimp Litopenaeus vannamei.

• 한국식품조리과학회지
• /
• 제16권2호
• /
• pp.99-111
• /
• 2000

The purpose of this study was to assess the qualities of cook/chilled soy sauce-glazed soybean curd with various packaging conditions as a trial to develop health-oriented convenience foods. The effects of three packaging methods, linear low density-polyethylene (LLD-PE), top sealing, and modified atmosphere packaging(MAP) on the shelf-life of HACCP-based cook/chilled soy sauce-glazed soybean curd were evaluated during 20 days of chilled storage in terms of time-temperature, microbiological (total aerobic plate count, psychrotrophic plate count, coliform, and fecal coliform count), chemical(pH and peroxide value(POV)), and sensory evaluation. The results of microbiological and chemical analyses were within the limits of the microbial and chemical standards for all phases after cooking. No significant differences were detected in microbial counts of the samples for all three packaging methods. However, sensory evaluation indicated that the top sealing and MAP methods showed a longer shelf-life than LLD-PE packaging. Recommended shelf-life of the product was 12 days for LLD-PE packaging, and 16 days for both top sealing and MAP. In conclusion, MAP was considered as the most effective packaging method for assuring microbial and sensory quality of this cook/chilled product.

• 한국식품영양과학회지
• /
• 제46권10호
• /
• pp.1253-1257
• /
• 2017

본 연구에서는 콩에서 유래한 단기 발효식품인 청국장, 물두시, 낫또 제품 중 대표적인 제품을 각각 하나씩 선택하여 이들의 일반적 특성과 항돌연변이 효능 및 항암 효능을 비교 연구하였다. 청국장은 아미노태 질소 및 암모니아태 질소의 함량이 높았으나, 낫또는 그 함량이 낮게 나타났다. 물두시의 경우 여타 발효식품에 비해 pH가 낮고 산도가 높았다. Ames test 및 HT-29 인체 대장암세포를 이용한 실험에서는 청국장이 우월한 항돌연변이 및 항암 효능을 나타냈다. 이상의 결과로 볼 때 청국장은 전반적으로 기능성이 우수한 것으로 나타났으며, 물두시는 낫또에 비해 기능성이 더 나은 것으로 나타났다. 이는 발효 기간의 차이, 제조방식, 원재료의 품질 등에 의한 것으로 여겨지며, 향후 각국의 식문화 및 조리 방식 등의 차이에 기초를 둔 추가적인 연구가 필요할 것으로 여겨진다.

• Journal of Nutrition and Health
• /
• 제55권4호
• /
• pp.492-505
• /
• 2022

본 연구에서는 콩고기에 대한 인식으로 집단을 나누어 이에 따른 식생활 정체성을 파악함으로써, 이를 통해 향후 콩고기 시장 진입을 위한 기초자료로서 국내 소비자의 지속 가능한 식품 선택을 위한 활용에 기여하고자 하였다. 국내 소비자 260명을 대상으로 수집된 자료를 SPSS 통계 프로그램을 이용하여 분석을 진행하였다. 군집 별 국내 소비자를 대상으로 콩고기 인식에 따른 인구 통계학적 분석과 식생활 정체성에 관한 연구 결과는 다음과 같다. 콩고기 인식에 따라 '소극적인 소비자 집단', '적극적인 소비자 집단'으로 군집을 나누었으며, 콩고기 인식에 따른 인구통계학적 분석은 연령, 결혼여부, 교육수준, 가족구성원의 항목에서 유의적인 차이가 나타났다. 콩고기 인식별 식생활 정체성의 결과로는 '친사회적동기 (p < 0.01)', '중심성 (p < 0.01)', '사적 규범 (p < 0.05)', '개인적 동기 (p < 0.001)'에서 유의적인 차이가 나타났다. 유의한 차이가 나타난 4가지 요인 모두 '소극적인 소비자 집단'이 상대적으로 낮은 점수로 나타났다. 본 연구의 결과는 향후 국내 채식주의자의 특성을 정의하는데 활용될 수 있을 것이며, 건강과 환경 등 다양한 국내 소비자의 지속가능 한 삶을 위해 콩고기 시장 확대에도 도움될 것으로 판단된다.

• 약학회지
• /
• 제4권1호
• /
• pp.50-52
• /
• 1959

In order to know contents of vitamin B$_{12}$ in the fermented foods in Korea, the contents of this vitamin are studied on the following foods; kimchies (pickled vegetables) .................. 39 chukkals (fermented and salted sea foods) ...... 8 fermented soy-bean products .................... 5 the kimchies and fermented soybean products studied in this paper, are from individual homes and chukkals are from markets. The content of vitamin B$_{12}$ is estimated by the microbiological assay method using lactobacillus leichmannii ATCC 7830. Details for assay are indicated in the original part of this paper. The pseudo-vitamin B$_{12}$ substances as thymidine which is active to the growth of lactobacillus leichmannii, are eliminated by the alkali treatment method of sample solution. According to the results as indicated in the table, the following conclusions are summerized; 1. Vitamin B$_{12}$ contents of kimchies for winter season are 1.03 to 1.52 mcg% in average. The hobakk-kimchi which contain the highest content of vitamin B$_{12}$ is not popular one among Korean. 2. Chukkals contain much higher content of vitamin B$_{12}$ varying from 0.91 to 11.10mcg%. 3. The soybean fermented foods, as kanjang, denjang, kochojang, contain lower content of vitamine B$_{12}$ varying from 0.08 to 0.52 mcg% containing higher content of pseudo-vitamin. 4. Based on daily consumption of kimchi in winter season by Chai, the consumption of this vitamin through kimchi is about 3 mcgs daily per capita. This will be a quite source of this vitamin for Korean as vitamin C. as vitamin C.

• 한국식품위생안전성학회지
• /
• 제9권3호
• /
• pp.133-139
• /
• 1994

The pyrolytic formation of benzo[a]pyrene during the cooking procedure was analysed in beef, pork, pacific saury, rice, and soybean by HPLC. In raw foods, benzo[a]pyrene (B[a]P) was not detected or negligible, but it was increasingly formed when foods were boiled (0.010~0.037 ppb) and more dramatically during broiling (0.302~0.851 ppb) in a time dependent manner. Human daily intake of B[a]P in Koreans and cancer risk assessment were estimated based on food consumption per capita and carcinogenic potency of B[a]P. When cooked foods were consumed for entire life time, cancer risk was estimated to bo 1.77$\times$10-6>1.65$\times$10-7>1.32$\times$10-8 by the order of broiled, boiled, and raw foods consumption. These data suggest that broiled foods produce more benzo[a]pyrene than water boiled foods. Thus cooking procedure is an important factor for the formation of carcinogens and needs to bo modified to reduce cancer risk for man.

• 한국식품저장유통학회지
• /
• 제31권3호
• /
• pp.374-384
• /
• 2024

Soybean paste is a staple food used to make doenjang (DE), cheonggukjang (CGJ), and miso (MI). In this study, solid-phase microextraction followed by gas chromatography-mass spectrometry was used to identify volatile components in DE, CGJ, and MI, and principal component analysis (PCA) was performed to determine their correlation between soybean pastes. Esters and hydrocarbons accounted for more than 55% of the total volatile components. PCA showed that esters were highly correlated with DE; pyrazines were correlated with CGJ; and alcohols were highly correlated with MI. Because DE, CGJ, and MI are made of the same material, their overall volatile content tended to be similar. However, the main volatile components and fragrances were different. These findings will be used as basic research data to promote quality improvement of soybean-based fermented foods in Korea and Japan.

• 한국식품영양과학회지
• /
• 제30권5호
• /
• pp.777-781
• /
• 2001

장류제품에 감마선을 조사하였을 때 감마선 조사가 장류제품의 영양성분 조성에 미치는 영향을 살펴보기 위하여 된장, 고추장 및 청국장에 0, 5, 10, 20 kGy의 선량으로 감마선을 조사한 다음 유리아미노산, 지방산, 그리고 유기산의 조성을 분석하였다. 유리아미노산과 지방산의 조성은 모든 시료에서 20kGy의 감마선 조사에 의하여 유의적인 변화가 없었다. 유기산은 청국장의 citric acid와 succinic acid는 감마선 조사전의 2%에서 10 kGy 이상의 조사선량에서 10% 수준으로 증가하였고, malic acid는 40%에서 30% 수준으로 낮아짐으로써 유기산 조성의 변화가 관찰되었으나 된장과 고추장에서는 20 kGy의 조사에 의해서도 유의적인 변화가 없었다.