• Journal of Applied Biological Chemistry
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• 제49권3호
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• pp.101-105
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• 2006

Degradation of the herbicide butachlor was investigated using laboratory-synthesized zerovalent iron ($Fe^0$). The synthesized zerovalent iron was determined to be nanoscale powder by scanning electron microscopic analysis. To investigate degradation of butachlor using the synthesized nanoscale zerovalent iron, time-course batch experiments were conducted by treating the solution of butachlor formulation with the iron. More than 90% degradation of butachlor was observed by iron treatment within 24 h. The synthesized nanoscale zerovalent iron showed an increase in particle aggregation in the batch tests. Green rust formation and a pH drop in solutions were observed, suggesting that the oxidation of the iron occurred. When the iron was extracted with dichloromethane, a negligible concentration was found in the extract, suggesting that butachlor did not bind to the iron particles. GC/MS analysis detected the dechlorinated product as a major degradation product of butachlor in the solutions. The data indicate that laboratory-synthesized zerovalent iron functioned as a reductant to remove electron-withdrawing chlorine, giving the dechlorinated product.

• 한국자원식물학회지
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• 제31권6호
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• pp.622-633
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• 2018

Chinese cabbage grown during autumn season is confronted with drought conditions for a certain period, especially during the early growth stage. In this study, we investigated the effects of drought stress on plant growth characteristics, as well as free amino acid, carotenoid, and proline in Chinese cabbage. Chinese cabbage seeds (Bulam Plus) were germinated, and all the seedlings were transplanted into plastic containers (28 cm diameter ${\times}$ 22 cm high) containing a commercial growth medium. The soil water content was measured and maintained at 10% for the drought-stressed plants and at 30% for the control plants, for three weeks. The results revealed that plant growth parameters were lower in the drought-stressed plants than in the control plants. The total free amino acid content tended to decrease in both drought-stressed and control plants with time. The total free amino acid content was found to be lower in the drought-stressed plants than in the control plants and the proline content was unaffected. Moreover, at three weeks after treatment, carotenoid content in drought stressed plants was significantly higher than that in the untreated plants. We believe that our study makes a significant contribution to the literature because the effects of drought stress on plant growth parameters, free amino acid, carotenoids, and proline accumulation in autumn growing cultivar of Chinese cabbage have not been widely studied in Korea, and our study provides valuable information in this regard, as Chinese cabbage is consumed throughout the year in Korea.

• 한국정보통신학회논문지
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• 제15권6호
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• pp.1391-1396
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• 2011

노동 집약적인 농업의 생산성을 높일 수 있는 방법은 IT 기술을 접목시키는 것이다. 유비쿼터스 컴퓨팅의 대표적인 기술은 교통, 자동차, 건설, 군방, 헬스, 농업, 의료 서비스 등 사회 전 분야에 적용되고 있다. 이러한 IT 기술은 전통산업 간의 융합기술 개발이 새로운 화두로 부상하고 있다. 유비쿼터스 농업 환경을 성공적으로 구축하기 위해서는 센서노드 H/W, 센서노드 미들웨이 플랫폼, 라우팅 프로토콜, 농업환경 응용 서비스 등 농업에 최적화된 핵심기술 개발이 필요하다. 본 논문에서는 정밀한 식물 생장환경관리를 위해서 재배온실에 환경요인 모니터링 센서 및 생체 정보 센서들을 이용하여 그린 생장환경 관리 시스템을 제안했다. 제안한 시스템을 이용하면 사용자는 저비용으로 특화된 융복합 농업을 실현할 수 있을 것으로 사료된다.

• 한국환경농학회지
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• 제34권4호
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• pp.336-344
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• 2015

국내에서 유통되고 있는 다소비 농산물 12품목에 대하여 알루미늄 오염정도를 조사하여 국민의 식품별 섭취량을 고려한 알루미늄 위해 정도를 평가하였다. 분석시료는 국내 유통중인 농산물 중 국민 다소비 품목인 쌀 등 12품목 130건을 수거하여, 식품의약품안전처에서 발행한 ｢검체 손질 실무 해설서｣를 토대로 시료를 손질 및 균질화한 다음 microwave 법으로 분해한 후 그 용액을 유도결합플라즈마방출분광기를 이용하여 알루미늄 성분을 분석하였다. 검출한계와 정량한계는 반응의 표준편차와 검량곡선의 기울기에 근거하여 산출하였는데, 알루미늄에 대한 검출한계는 0.851 μg/kg, 정량한계는 2.838 μg/kg이었다. 분석법에 대한 검증으로 검량선에 대한 직선성 R2 0.9999 이상임을 확인하였고, AOAC 재현성 및 정밀성을 확인 한 결과 C.V.% 값이 5% 미만으로 상당히 양호하게 나타났으며, 회수율 또한 97.6%로 AOAC에서 권장하는 기준을 만족하였다. 알루미늄 평균 검출농도는 시금치 6.963 mg/kg, 콩 6.207 mg/kg, 대파 3.511 mg/kg 순으로 높게 나타났고, 감자에서 0.257 mg/kg으로 가장 낮은 농도를 보였다. 국민들이 일상적으로 섭취하는 다소비 농산물에서 알루미늄의 노출정도를 확인하였는데, 12품목 130건에 대한 알루미늄 평균 함량은 1.895 mg/kg으로 일일 노출량은 0.573 mg/day로 나타났다. 품목별로는 쌀이 89.31 μg/day로 노출량이 가장 높았고, 시금치 45.96 μg/day, 대파 43.89 μg/day 순으로 나타나 노출 기여율이 쌀 36%, 시금치 19%, 대파 18%의 순으로 평가되었다. 본 연구에서 노출량에 따른 위해도는 다소비 농산물 12품목을 모두 섭취하였을 경우 PTWI 대비 3.65% 수준으로, 국민이 농산물 섭취로 인한 알루미늄 위해 가능성은 상당히 낮은 것으로 평가되었다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2005년도 INTERNATIONAL SYMPOSIUM ON SOIL & GROUNDWATER ENVIRONMENT
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• pp.222-223
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• 2005

• 한국안전학회지
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• 제29권6호
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• pp.132-136
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• 2014

Recently supporting policy of government for agricultural is changing from individual to workplace. For this reason, the number of industrial injury is increasing due to increase workplace in the agriculture. However, because the studies on the characteristics and causes of injury have not been performed, the effective measure for the prevention of industrial injury is difficult to establish. The aim of this study is to analyze the industrial injury characteristic and prepare the effective counterplan to prevent industrial injury of the workplace in the agriculture. This study analyzed 2,970 cases of industrial injury during the last five years (2008-2012) in the agriculture sector. The data was offered by Korean Occupational Safety and Health Agency. The results of analysis the industrial injury characteristic of the workplace in the agriculture, number of industrial injury for source of industrial injury was 12.3% in the outdoor floor and injury type was 23.1% in the fall. This study analyzed industrial injury characteristic which size and type of workplace, injury type and source of industrial injury through the case of industrial injury in agriculture. The result of this study will be helpful to identify the industrial injury characteristic in the agriculture and prepares the effective industrial injury prevention method.

• Asian-Australasian Journal of Animal Sciences
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• 제15권5호
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• pp.751-756
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• 2002

A study was carried out to evaluate the incidences and causes of bovine mastitis in Tanzanian shorthorn zebu (Bos indicus) in the traditional sector and crossbred cows (Bos taurus${\times}$Bos indicus) in the dairy ranching sector, both found under the extensive range management system. Management practices were evaluated through a survey study using structured questionnaires. A total of 120 lactating cows (60 cows from each sector) were screened for the disease using the California Mastitis Test (CMT). Confirmatory tests used for infected cows included; the Direct Microscopic Somatic Cell Count (DMSCC), culture, bacteriological and biochemical laboratory assays. Survey results showed that management practices were generally very poor in both sectors with 84% of the surveyed herds being kept and milked under very unhygienic environmental conditions. The level of infection was higher in the crossbred cows (5% clinical and 38.3% sub-clinical mastitis) and lower in the zebu cows with only sub-clinical mastitis (23.3%). Crossbred cows had (p<0.05) higher somatic cell counts than zebu cows. The four highest-ranking bacterial isolates in order of importance were Staphylococcus aureus, Escherichia coli, Streptococcus agalactiae and Bacillus spp. It was concluded that bovine mastitis under the extensive management system in Tanzania was a result of poor management practices and that zebu cows were more resistant to the diseases than crossbred cows.

• 디지털산업정보학회논문지
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• 제11권2호
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• pp.141-152
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• 2015

Our agriculture and rural villages have faced negative conditions in many reasons. To overcome this situation, a new change is needed by the 6th industrialization. Many agriculture and rural villages in Korea are pursuing the 6th industrialization through the convergence of the primary, secondary, and tertiary industries to vitalize agriculture and rural villages. But there are several problems with the 6th industrialization. There is a limit to the capacity building of the members of the rural organization and Korean agricultural base primary, secondary, and tertiary industries are weak all. In addition, it has been insufficient research for value chain management of the region as a whole; there has been no study of information sharing across the region for the 6th industrialization. This study is about value chain management model for successful the 6th industry with Quick Response System and the big data technology. In this study to provide the efficiency of 6th industry value chain management with customer's needs analysis using big data and research for the information share between the industries in the region through the information pipeline theory of the QR System. We hope that our study is helped to proceed successfully on the 6th industrialization in Korea.

• 한국유기농업학회지
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• 제28권1호
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• pp.59-68
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• 2020

This study analyzed and suggested management situations and improving issues on a consumer cooperatives which has supplied environmentally friendly agricultural products from the year 2002. Indices of management analysis are stability ratio, activity ratio and profitability ratio. Management Stability ratio indices are debt ratio, net worth ratio, fixed ratio and current ratio. Management activity ratio ones include fixed assets turnover and net worth turnover. And profitability ratio is showed through return on investment, net return on sales and return on equity. In order to analyze these indices, financial statements after the closing entires are used each year.

• 한국유기농업학회지
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• 제19권spc호
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• pp.263-266
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• 2011

Crop protection strategies in organic horticulture aim to prevent insect pest and plant disease problems through utilization of non-chemical based control means. In order to develop a model for management of plant diseases and insects in organic cucumber cultivation, we compared efficacies between chemical pesticide spraying system and biological control means in semi-forcing and retarding cucumber cultivation during 2005 and 2006. Conventional chemical spray program using various chemical pesticides was applied 5 - 10 days intervals, while two different non-chemical pesticide application programs using two formulated biopesticides Topseed$^{TM}$ and Q-fect$^{TM}$, Suncho$^{TM}$, and Sangsungje$^{TM}$ (biocontrol agents 1) and using egg-yolk and cooking oil(EYCO), Bordeaux mixture, Suncho$^{TM}$, and Sangsungje$^{TM}$ (biocontrol agents 2) were applied 5 - 7 days intervals during entire cucumber cultivation period. Efficacy of both biocontrol agents programs was effective to comparable to conventional chemical pesitice spray program to control plant diseases such as powdery mildew and downy mildew as well as insect pests such as aphids and thrips which are known as major threats in cucumber organic cultivation. In this study, we established and evaluated an effective and economic crop protection strategy using various biological resources can be used to control plant diseases and pests simultaneously in organic cucumber cultivation field.