• Journal of Microbiology and Biotechnology
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• 제21권1호
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• pp.43-49
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• 2011

As a rare sugar alcohol, L-arabitol can be used in food and can prevent extra fat deposits in the intestinal tract. Commercially, L-arabitol is prepared from pure L-arabinose by hydrogenation, which needs a high temperature and high pressure, leading to a high production cost for Larabitol. Therefore, this study describes a novel L-arabitol production method based on biological purification from the xylitol mother liquor, a cheap and readily available raw material that contains a high concentration of Larabitol. First, a novel Bacillus megaterium strain was screened that can utilize xylitol, sorbitol, and mannitol, yet not L-arabitol. The isolated strain was inoculated into a medium containing the xylitol mother liquor under formulated culture conditions, where a high L-arabitol yield (95%) and high purity (80%) were obtained when the medium was supplemented with 50 g/l of xylitol mother liquor. Upon further purification of the fermentation broth by ion exchange and decolorization, L-arabitol was crystallized with a purity of 98.5%.

• 한국조리학회지
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• 제12권1호
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• pp.144-156
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• 2006

In the survey of Korean and Japanese female students at the age of $20{\sim}22$, the conceptions of Japanese, Korean, Chinese and Western daily foods were recorded by SD and factor analysis and their perceptions about cuisine of their own countries and other countries in the diets of young people were figured out on the basis of their conceptions. The results are given below. The trends of perceptions about cuisine of their own countries and about Chinese and Western cuisine were coincided in both the Korean and the Japanese. The perceptions of their own countries‘ cuisine might seem to be traditional, familiar, cheap, and delicious. About Western cuisine, they felt that it seemed to be elegant and expensive but not familiar or delicious. Furthermore, the Korean had stronger perceptions about it than the Japanese had. For Chinese cuisine, the Korean felt the same as they did toward the Japanese foods just as the Japanese felt that the Korean cuisine was similar to the Chinese cuisine. The Japanese have thought that the Korean food-style was similar to that of their own country and Kimchi and Bulgogi have emerged in popular Japanese cooking. Also, they felt that the Korean cold noodle dish and Bibimbab were very familiar. On the other side, the Korean have become familiar with sushi, grilled meat, and Japanese noodles, but they were not familiar with other foods.

• 분석과학
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• 제5권1호
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• pp.91-96
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• 1992

실험실에서 간단하고 값싼 교류 전압전류계를 제작하였다. 이 장치는 직류함수 발진기, lock-in 증폭기로 구성되어 있다. 1M 황산용액에서 백금을 작업전극으로 하여 $1{\times}10^{-3}M$ ${Fe(CN)_5}^{3-}$의 가역계에서 CV 전압전류곡선과 교류 전압전류곡선을 구한 데이터로부터 이 장치가 잘 작동되는 것으로 증명되었다. 요오드에 대한 정량분석 결과도 구하였다.

• Agribusiness and Information Management
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• 제3권2호
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• pp.9-16
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• 2011

With the confirmation of the Free Trade Agreement (FTA) and as cheap foreign agricultural products are beginning to be freely distributed in Korea, the government has taken a greater interest in securing the competitiveness of domestic agriculture. Accordingly, the Korean government has presented plans to advance the interests of 'small but strong farmers' and secure their competitiveness in line with the agricultural conditions in Korea. The government also announced that it will focus on leading these efforts in rural areas. The main thrust of this plan to support 'small but strong farmers' focuses onutilizing advanced peripheral technologies such as IT and BT; however, there are only a few Information Management Division centers currentlyoperating across the nation, and these are mainly in the IT-related divisions of the Agricultural Research and Extension Services and Agricultural Technology Centers. Therefore, in this study, we used the responses from a survey of farmers to identify regional differences in informatization levels and the digital divide among 'small but strong farmers' according to the presence or absence of an Information Management Division center. As a result, we found that the 'small but strong farmers' in regions with an active Information Management Division center received more IT services and had a higher level of informatization. Thus, to increase the use of IT-related peripheral technology by these 'small but strong farmers', it is important to maintain or increase the number of Information Management Division centers.

• 생명과학회지
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• 제16권1호
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• pp.168-174
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• 2006

광학활성 에폭사이드는 다양한 반응성으로 인하여 고부가가치 광학활성 의약품 및 농약 합성용 중간체로 널리 이용되고 있다. 광학활성 에폭사이드는 에폭사이드 가수분해효소 (epoxide hydrolase, EH)를 이용하여 저가의 라세믹 기질에 대한 입체선택적 가수분해 반응을 통해 제조할 수 있으며, EH는 유도과정 없이 발현되고 보조인자가 필요 없으며 비교적 효소 안정성도 높아 상업적으로 유용한 효소이다. EH에 대한 생화학 및 분자생물학 관련 최근 연구 결과를 바탕으로 촉매 활성 증대 및 기질 선택성을 변경시킨 tailer-made형 EH 생촉매 개발이 가능할 것이며, 실규모의 비대칭 광학분할 생물공정 시스템 개발을 통해 EH에 의한 동력학적 가수분해반응을 이용한 광학활성 에폭사이드 생산기술의 상업화가 가능할 것으로 기대된다.

• 복식문화연구
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• 제27권2호
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• pp.181-192
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• 2019

The growth of cheap, industrial, mass-production-so-called "fast fashion"-has led to dramatic increases in levels of consumption. Inexpensive products tend to foster unsustainable consumption behaviors, which negatively impact the environment and increase pressure to obtain goods at lower and lower prices; this, in turn, has the competitive effect of decreasing wages. This study focused on the concept of socially responsible consciousness in relation to fashion products. Environmental and labor issue concerns were employed as major variables. Empirical data were collected from males and females, between the ages of 10 and 50. Demographic differences were found in SR consciousness. For example, participants in their 10s, 40s, and 50s had higher levels of SR consciousness than those in their 20s and 30s. In addition, consumers' levels of environmental and labor issue concerns had varying effects on the criteria they used to select clothing. Product category type was also an influential factor. Moreover, the analysis showed that SR consciousness was less important in the apparel industry than in the food sector. The study also found an attitude-behavior link in relation to the concept of SR consciousness. The link was stronger for environmental concerns than for labor issue concerns. This study aimed to develop a better understanding of current customers' characteristics and levels of SR consciousness.

• 한국프랜차이즈경영연구
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• 제4권1호
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• pp.113-129
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• 2013

The realization of agricultural modernization, the solving of the "three rural" issue as well as the increment of farmers' income is one of China's top priority. Thus, under the support and encouragement of government's relevant policies, China has introduced the "Supermarket-Farmer Direct Purchase" which is a new mode for the supply of agricultural products. This is an innovative of agricultural products circulation mode, and the comprehensive promotion will help supermarkets get cheap goods directly from the hands of farmers, thus forming price competitiveness; farmers can also get profits and subsidies from supermarkets which can eliminate middlemen's profit, thus increasing their revenue; consumers can both get a guarantee of food safety and save expenses, and the win-win situation for the supermarkets, farmers, and consumers will be achieved. However, the dilemma between "farmers having difficulty in selling" and "supermarkets having difficulty in buying" is still frequent. So in this thesis, through theoretical research and situation analysis, each relevant part of the "Supermarket-Farmer Direct Purchase" mode will be studied as a whole. Moreover, effectiveness will be evaluated and relevant problems will be identified. Then, based on foreign experience and our national conditions, new modes and advice will be provided for users in different circumstances.

• Asian-Australasian Journal of Animal Sciences
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• 제28권2호
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• pp.180-187
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• 2015

This study was conducted to determine the effects of feeding by-product feed (BF)-based silage on the performance, blood metabolite parameters, and carcass characteristics of Hanwoo steers. The BF-based silage was composed of 50% spent mushroom substrate, 21% recycled poultry bedding, 15% cut ryegrass straw, 10.8% rice bran, 2% molasses, 0.6% bentonite, and 0.6% microbial additive (on a wet basis), and ensiled for over 5 d. Fifteen steers were allocated to three diets during the growing and fattening periods (3.1 and 9.8 months, respectively): a control diet (concentrate mix and free access to rice straw), a 50% BF-based silage diet (control diet+50% of maximum BF-based silage intake), and a 100% BF-based silage diet (the same amount of concentrate mix and ad libitum BF-based silage). The BF-based silage was fed during the growing and fattening periods, and was replaced with larger particles of rice straw during the finishing period. After 19.6 months of the whole period all the steers were slaughtered. Compared with feeding rice straw, feeding BF-based silage tended (p = 0.10) to increase the average daily gain (27%) and feed efficiency (18%) of the growing steers, caused by increased voluntary feed intake. Feeding BF-based silage had little effect on serum constituents, electrolytes, enzymes, or the blood cell profiles of fattening steers, except for low serum Ca and high blood urea concentrations (p<0.05). Feeding BF-based silage did not affect cold carcass weight, yield traits such as back fat thickness, longissimus muscle area, yield index or yield grade, or quality traits such as meat color, fat color, texture, maturity, marbling score, or quality grade. However, it improved good quality grade (1+ and 1++) appearance rates (60% for the control group vs 100% for the BF-based silage-fed groups). In conclusion, cheap BF-based silage could be successfully used as a good quality roughage source for beef cattle.

• 농약과학회지
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• 제18권4호
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• pp.296-313
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• 2014

토양환경 중 잔류농약 동시분석을 위해 124종의 농약을 대상으로 QuEChERS 전처리와 LC-MS-MS를 이용한 분석법을 개발하고자 하였다. QuEChERS 전처리 과정은 토양시료에 0.2N $NH_4Cl$ 용액 침지하고 1% acetic acid 포함 acetonitrile 용매로 추출 후 $MgSO_4$ 및 NaOAc로 salting out하고 PSA 50 mg, $C_{18}$ 50 mg, $MgSO_4$ 150 mg를 이용해 정제하였다. 분석법의 검증을 위해 양토 및 사양토 두 토양에서 0.005, 0.01, 0.02, 0.1 mg/kg 4수준으로 처리 후 회수율 실험을 실시하였다. 회수율 실험결과 Benfuracarb, Ethiofencarb, Pymetrozine, Pyrethrin 성분을 제외하고 나머지 성분들은 사양토와 양토 모두 70~120%의 적정 회수율을 나타내었으며, 상대표준편차도 20% 이내를 양호한 결과를 나타내었다. 따라서 QuEChERS 전처리 및 LC-MS를 이용한 분석법은 토양 중 잔류농약 다성분동시분석에 적용이 가능할 것으로 판단되었다.

• 한국식품위생안전성학회지
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• 제38권3호
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• pp.79-88
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• 2023

Trifludimoxazin은 triazinone 계열 제초제로 프로토포르 피리노겐-IX 산화효소(protoporphyrinogen oxidase, PPO)를 억제하며 벼와 광엽 잡초를 방제하는 데 사용된다. PPO의 결핍은 세포막의 손상을 일으켜 식물을 시들게 한다. Trifludimoxazin의 농산물 중 잔류허용기준은 미국에서 아몬드에 대하여 0.15 mg/kg, 땅콩 등 9종에 대하여 0.01 mg/kg으로 설정되어있으며, 모화합물을 잔류물의 정의로 설정하여 관리하고 있다. 코덱스(CODEX), 유럽(EC) 일본(JFCRF)에서는 잔류허용기준(MRL)과 잔류물의 정의가 설정되어 있지 않다. 호주(APVMA)에서는 trifludimoxazin과 대사체 M850H001의 합을 잔류물의 정의로 설정하였으며, MRL은 보리와 밀에 0.01 mg/kg으로 설정되어 있다. 국내에서 신규 등록 예정임에 따라 본 연구에서는 농산물 중 trifludimoxazin의 잔류량을 분석하기 위한 공정시험법을 마련하고자 하였다. Trifludimoxazin의 물리 화학적 특성을 고려하여 아세토니트릴을 추출용매로 사용하는 Quick, easy, cheap, effective, rugged and safe (QuEChERS)법을 이용하여 추출 및 정제조건을 확립한 후 LC-MS/MS를 분석기기로 선정하였다. Trifludimoxazin의 결정계수(R²)는 모두 0.99 이상으로 우수하였으며 정량한계는 0.01 mg/kg으로 나타났다. 대표 농산물 5종(현미, 감자, 대두, 감귤, 고추)에 대하여 정량한계, 정량한계 10배, 정량한계 50배 수준으로 처리하여 회수율 실험을 한 결과 평균 회수율은(5반복) 73.5-85.3%로 나타났으며, 상대 표준편차(RSD)는 3.8% 이하로 나타났다. 본 연구는 국제식품규격위원회 농약 분석법 가이드라인의 잔류농약 분석 기준 및 식품의약품안전평가원의 식품등 시험법 마련 표준절차에 관한 가이드라인(2016)에 적합한 수준이며, 향후 공정시험법으로 활용될 예정이다. 본 연구에서 개발한 시험법에 대해 농산물 125건을 대상으로 잔류농약 모니터링을 한 결과 trifludimoxazin의 잔류량이 확인되지 않았다.