• Journal of Microbiology and Biotechnology
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• 제9권2호
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• pp.223-226
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• 1999

A bacterial strain producing high level of an extracellular phytase was isolated from cooked rice and identified as a strain of Bacillus sp. and designated as Bacillus sp. KHU-10. Optimum culture conditions were investigated for the maximum productivity of phytase by Bacillus sp. KHU-10. 1.0% Maltose and 1.0% peptone with 0.5% beef extract were the best carbon source and nitrogen source, respectively. The addition of $CaCl_2$, stimulated the enzyme productivity with concentration between 0.01% and 0.2%, in the medium. Although sodium phosphate increased the cell mass, the enzyme activity decreased. Calcium phytate and wheat bran containing phytate did not enhance the enzyme production. Under the optimum medium, the production of the phytase reached the highest level of 0.2 unit/ml after 4 days of incubation.

• 한국식품조리과학회지
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• 제8권1호
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• pp.31-41
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• 1992

This study has made use of the work sampling for work analysis and productivity of food service institutions centering on 3 general hospitals of 400∼600 beds and centralized service system in Seoul. The results were as flollows; 1. In the mean work percent of dietitians: The indirect work functions marked the highest, as it was 22.0% for the direct work functions, 57.4% for the indirect work functions and 20.6% for the delays. Among the indirect work functions, the decreasing order was original clerical (38.1%), instruction or teaching (8.5%), conference or interview (8.5%), and appraisal (2.3%). 2. In the mean work percent of clerical personnels: The direct work functions (67.2%) marked the highest. Among those, routine clerical was 64.3%, and receiving was 2.8%. 3. In the mean work percent of workers: The direct work functions (77.4%) marked the highest. Among those, the decreasing order was service (24.7%), cooking (22.5%), cleaning (18.2%), and transportation (10.3%). 4. Work percent per labor hour: Dietitians usually continued to work even during the lunch time. In case of clerical personnel working in turn, work percent was high even during the lunch time, however in the other case, it was very low. It was shown that the workers had lunch and break time after every their service. 5. The number of meals served per labor hour were 6.3 meals, and labor time spent per served meal 9.8 minutes.

• Journal of Microbiology and Biotechnology
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• 제21권9호
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• pp.968-971
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• 2011

Leuconostoc genus, which comprise heterofermentative lactic acid bacteria, reduces fructose to mannitol by recycling intracellular NADH. To evaluate the mannitol productivities of different Leuconostoc species, 5 stock cultures and 4 newly isolated strains were cultivated in MRS and simplified media containing glucose and fructose (1:2 ratio). Among them, L. citreum KACC 91348P, which was isolated from kimchi, showed superior result in cell growth rate, mannitol production rate, and yield in both media. The optimal condition for mannitol production of this strain was pH 6.5 and $30^{\circ}C$. When L. citreum KACC was cultured in simplified medium in a 2 l batch fermenter under optimal conditions, the maximum volumetric productivity was 14.83 $g{\cdot}l^{-1}h^{-1}$ and overall yield was 86.6%. This strain is a novel and efficient mannitol producer originated from foods to be used for fermentation of fructose-containing foods.

• Journal of Microbiology and Biotechnology
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• 제6권2호
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• pp.132-136
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• 1996

To investigate the characteristics of immobilized peppermint (Mentha piperita) cells, dry cell weight (DCW), change of cell viability, and oil productivity of the immobilized cells were determined. Peppermint cells were immobilized in polyurethane (PU) foams of $5{\times}5{\times}5$ mm and cultured in a shaking flask. The maximum DCW was 2.1 mg per foam piece after 20 days of cultivation and the cell density was approximately 420 mg per flask containing 200 foams in 200 ml medium. For the first five days of cultivation, the cell viability was about 80$%$ and decreased to 70$%$ during 5 to 20 days of cultivation. The maximum oil productivity, 148 mg/l was achieved after 40 days of cultivation. The immobilized cells were also cultivated in a bioreactor, equipped with a round spiral type impeller, containing 2, 400 PU foams. The cell viability after 30 days of cultivation with chitosan as an elicitor in the bioreactor was 67$%$ and DCW was 2.0 mg per foam piece. Though the cell viability was relatively high in the bioreactor system, the oil productivity was relatively lower than that of the flask system.

• 대한영양사협회학술지
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• 제4권2호
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• pp.225-234
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• 1998

Nutrition during childhood is essential for growth and maintenance of health. Good food habits developed during the childhood will contribute both to the healthy growth and the prevention of the degenerative disease of later life. Both parents and the providers in child care centers play an important role for children's good eating behavior. Therefore all child care programs should achieve recommended standards for meeting children's nutritional and educational needs in a safe, sanitary, and supportive environment to promote the healthy growth and development of children. The purposes of this study were to evaluate the foodservice management practices and assess the needs for a Central Production Unit by contacting the child care center' providers. This approach was achieved using a variety of qualitative and quantitative information including the general foodservice management practices and the needs for a Central Production Unit. An indepth face-to-face interview with structured-questionnaires was undertaken at 32 representative child-care centers in Seoul. Statistical data analysis was done using the SAS program for descriptive analysis and ANOVA. The number of national/public and private sectors were 11 respectively, followed by 10 licensed home day-care centers. Total average number of children in child-care centers was 54.3 $\pm$48.5. The foodservice productivity index in child-care centers was 4.8 minutes per meal for public child care centers, 6.0 for private child-care centers, and 9.8 for home child care centers. Home child care centers were found to have the lowest productivity index which indicated inefficient foodservice practice. The important factors in group purchasing were menus(39.6%) or close distance(39.6%) > type of foodservice operation(32.8%) > total number of meals(19.9%) > food costs(16.2%) in order. Average score of the efficiency for central food production in child-care centers was 3.80 $\pm$0.84 out of 5.

• 한국초지조사료학회지
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• 제38권2호
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• pp.120-125
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• 2018

본 연구는 야초지에서 흑염소 방목사육 시 사초생산성, 사료가치, 적정 방목강도 규명 및 가축생산성 분석을 통하여 야초지의 이용성을 평가하고 흑염소 방목 사육에 대한 기초적인 자료를 제공하고자 실시하였다. 공시축은 평균체중 14kg 전후의 4개월 령 육성기 암컷 흑염소 10두로 방목실험을 실시하였다. 방목 시 보충사료는 체중의 1.5%로 추가 급여 하였으며, 물은 자유 급수 할 수 있도록 하였다. 야초지의 건물함량은 봄에서 가을로 갈수록 건물함량이 증가하는 보고와 비슷하게 6월과 9월에 각각 $24.9{\pm}0.56%$, $24.4{\pm}0.89%$로 유의하게 높았다(p<0.05). 조단백질 함량은 평균함량 11%~12%를 유지하여 처리구간 유의성은 보이지 않았다. 야초지의 사료가치는 일정수준으로 영양소 함량이 유지되었으나 계절별로 생산되는 야초의 종류가 다르기 때문에 차이가 존재하였다. 방목 시 사초생산성은 야초의 경우 대부분 C-4형 식물이기 때문에 기온이 높은 여름철인 6월부터 8월까지 생산성의 증가한 것으로 보이며 8월의 경우 유의하게 높았다(p<0.05). 8월 이후 생산성이 급격히 감소하여 봄철과 가을철에 급격하게 생산성이 저하되는 야초지의 특성을 보였다. 방목 초지의 월별 생산성과 흑염소의 채식량을 기준으로 분석을 통해 월별 방목 강도를 설정하였다. 계산된 방목 강도는 8월에 55두/ha 로 가장 높았으며, 사초생산성이 떨어지는 시기인 9월에 21두/ha로 가장 낮았다. 평균 방목강도는 37두/ha로 이를 기준으로 보충사료의 양을 조절하여 방목 흑염소에게 부족하거나 과잉된 영양소 공급의 균형을 맞출 필요가 있을 것으로 사료된다. 흑염소 생산성의 계절별 변화는 증체량이 80.2 g/d 이었다. 방목구에서 안정적인 증체의 결과는 방목 후 추가로 농후사료를 보충급여 함으로써 흑염소의 영양소 요구량을 충족시켰기 때문이며, 방목사육 시 사초생산성이 떨어지는 시기에 적절한 방목강도 조절과 필요 영양수준에 맞춘 보충사료를 급여 한다면 가축의 생산성을 더 높일 수 있을 것으로 판단되며 야초지의 효율적인 활용기술 및 흑염소 방목기술의 추가적인 연구를 통하여 유기축산 및 산지생태축산 실현에 기여할 수 있을 것으로 사료된다.

• 한국식품조리과학회지
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• 제19권3호
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• pp.286-294
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• 2003

대구ㆍ경북지역 학교급식소의 질적 향상을 위하여 현재 수행되고 있는 운영현황 및 관리현황, 급식 생산성을 유형별로 분류하여 도시형 18개교, 농어촌형 13개교와 도서벽지형 18개교 총 49개교의 영양사와 조리종사원을 대상으로 조사한 결과는 다음과 같다. 1. 전체조사대상의 급식종사원수는 도시형 학교에 근무하는 종사원이 109명, 농어촌형 학교에 근무하는 종사원이 71명, 도서벽지형에 근무하는 종사원이 70명으로 총 250명이었으며 학교 유형별 급식인원수는 도시형 학교가 894.6으로 농어촌형 학교의 446.2명과 도서벽지형 학교의 170.6명보다 유의하게(p$\leq$0.001) 많았다. 제공한 부식 수는 평균 2.82개이며 농촌형 학교에서 3.23개의 부식을 제공하여 도시형과 도서벽지형 학교보다 유의하게 차이가 있었다. 또한 급식종사원 1인당 급식수는 도시형 학교가 152.91명, 농어촌형 학교가 73.6명, 그리고 도서벽지형 학교가 40.4명으로 학교유형간에 유의한(p$\leq$0.001) 차이가 있었다. 급식비 1인당 1식 단가는 평균 1180.98원으로 도서벽지형 학교가 1231.19원, 농어촌형 학교가 1160.93원, 그리고 도시형 학교가 1092.99원으로 학교유형간에 유의한(p$\leq$0.001) 차이가 있었다. 급식 1식당 인건비는 평균 452.94원으로 도서벽지형 학교가 682.52원으로 가장 높았으며 도시형학교가 267.71원으로 가장 낮았다. 2. 도시형 학교에 근무하는 급식종사원의 직무만족도는 123.41으로 농어촌형 학교에 근무하는 급식종사원의 직무만족도 147.49와 도서벽지형 학교에 근무하는 급식종사원의 직무만족도 140.39보다 유의하게(p$\leq$0.01) 낮게 나타났고 급여만족도는 도시형 학교에 근무하는 급식종사원이 6.39로 농어촌형 학교에 근무하는 급식종사원의 급여만족도 9.46과 도서벽지형 학교에 근무하는 급식종사원의 급여만족도 9.21보다 유의하게(p$\leq$0.001)낮게 나타났다. 3. 급식생산성 지수는 도시형 학교가 21.36으로 가장 높았고 농어촌형 학교가 9.07 그리고 도서벽지형 학교가 5.97로 학교 유형간에 유의한(p$\leq$0.001) 차이가 있었다. 4. 급식생산성 지수는 급식수와 총 식재료비와 양의 상관관계를, 제공된 부식수와 1식당 식재료비와는 음의 상관관계를 보여 초등학교 급식소의 생산성은 급식의 규모가 커질수록 급식생산성이 증가하였고 부식수가 많을수록, 1식당 식재료비가 높을수록 급식생산성은 감소한다고 볼 수 있다. 5. 인적 관련 변수 중 급식종사원의 연령, 근무기간 및 조리원 1인당 급식수는 급식생산성과 양의 상관관계를 보였고 1식당 인건비, 급식종사원의 만족도 그리고 급식종사원의 급여에 대한 만족도는 급식생산성과 음의 상관관계를 보였다. 결론적으로 학교급식의 생산성을 높이고 급식의 질을 향상시키기 위하여 급식의 규모가 작은 경우 특히 농어촌형과 도서벽지형 학교 급식소에 있어서 단독교 조리방식으로 분산시키지 말고 인근의 급식학교들을 한데 묶어 함께 조리하는 공동조리장 조리방법을 선택하는 것이 바람직하다고 사료되며 또한 급식생산성과 유의적인 관계를 지닌 변수들에 대한 다각적인 측면, 특히 급식종사원의 직무만족요인 및 작업관리에 대한 연구와 더불어 소비자의 만족도에 대한 연구가 함께 이루어져야 하겠다.

• 한국수산과학회지
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• 제43권5호
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• pp.547-550
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• 2010

Jinhae Bay is a typical aquaculture farm with active fisheries. However, it has been contaminated by the development of a major city and industrial area, and has therefore diminished in value as a fishing ground. To preserve the continuing productivity of the ocean, we have to estimate fisheries resources. To analyze the fisheries resources in Jinhae Bay, we evaluated the Fisheries Productivity Index (FPI). The FPI is composed of the Total production ($T_p$), Total amount ($T_a$), and Production of edible protein ($E_p$), nitrogen ($N_p$) and phosphorous ($P_p$). To calculate the FPI, we used Annual statistics on cooperative sales of fishery products data from 1979 to 2004 and the Food composition table. The results of the FPI were as follows. $T_p$ ranged from 70,235 tons to 113,556 tons and $T_a$ ranged from 107,004 million won to 373,776 million won. $E_p$ ranged from 8,124 tons to 13,357 tons, $N_p$ ranged from 1,965 tons to 3,273 tons, and $P_p$ ranged from 168 tons to 276 tons. According to the FPI, maximum fisheries productivity occurred in 1994, when $T_a$, $E_p$, $N_p$ and $P_p$ were at their highest values.

• Journal of Korea Trade
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• 제25권2호
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• pp.95-110
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• 2021

Purpose - This paper intends to conduct theoretical analysis and empirical test on the action mechanism of South Korea-China trade and South Korea's FDI to China on green total factor productivity, so as to provide a new perspective and ideas for the improvement of China's green total factor productivity and promote the high-quality development of China's economy Design/methodology - This paper uses the data of 30 provinces, autonomous regions and municipalities in China from 2004 to 2017 as the research sample, adopts the GML index method of SBM Directional Distance Function to measure GTFP, and analyzes the influence of South Korea-China trade and FDI from South Korea on China's GTFP. Findings - Trade is conducive to promoting technological progress, which has a significant promotion effect on China's green total factor productivity. While FDI has a significant inhibitory effect on China's green total factor productivity, which verifies the "pollution haven" hypothesis. In addition, such influence has certain regional overall heterogeneity. Trade has a more significant promoting effect on GTFP in eastern coastal areas, while FDI has a more significant inhibitory effect on GTFP in central and western inland areas. The interaction between trade and FDI is conducive to the improvement of green total factor productivity, indicating that the benign mechanism of trade and FDI has been formed. Urbanization, industrial structure, human resource level and investment in science and technology are all conducive to the improvement of GTFP. Originality/value - Through theoretical analysis and empirical test on the action mechanism of South Korea-China trade and South Korea's FDI on green total factor productivity, this paper provides a solid theoretical foundation for the further development of China-South Korea economic and trade cooperation in the future.

• Journal of Microbiology and Biotechnology
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• 제6권2호
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• pp.137-141
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• 1996

Acetoin and ammonia, the precursors of tetramethylpyrazine (TMP) having "meaty" or "roasted" flavors, were produced by the culture of Lactococcus lactis ssp. lactis biovar. diacetilactis FC1 in free and immobilized cell systems. Cells were immobilized using k-carrageenan and then were incubated at $34^{\circ}C$. The TMP productivity (0.34 g/l) and the conversion ratio (9.3%) of acetoin to TMP of the immobilized cell system were higher than those (0.24 g/l, 7.0%) of the free cell system. When the beads were activated for 12 h, the productivity of acetoin and TMP increased slightly.