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안재민 ( Jae-min An ),홍경숙 ( Kyong-suk Hong ),윤혜정 ( Hye-jeong Yun ),김성연 ( Sung-youn Kim ),유경은 ( Kyung-eun Yu ),신희창 ( Hee-chang Shin ),윤재돈 ( Jae-don Yun ),이재훤 ( Jae-hwon Lee ),김동호 ( Dong-ho Kim ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
The present study was carried out to reduction of lead(Pb), cadmium(Cd), mercury(Hg), arsenic(As), chromium(Cr) and nickel(Ni) concentrations by 5 milling degrees(0.0%, 2.4%, 4.8%, 7.2% and 9.6%, from husked rice to polished rice) in rice. Recently, various rice by milling degree is sold for health and taste. To provide safe food to consumers, it is need to know the change of their concentrations according to milling degree of rice. Pb, Cd, As, Cr and Ni analysis in milled rice 255 samples were performed using microwave device and Inductively Coupled Plasma Mass Spectrometry(ICP/MS), whereas mercury was determined by automatic mercury analyzer(DMA-80). The contents of lead, cadmium, mercury, arsenic, chromium and nickel in samples were determined. The contents of lead was 0.0010-0.0572 mg/kg, cadmium was 0.0031-0.1009 mg/kg, mercury was 0.0001-0.0421 mg/kg, arsenic was 0.028-0.244 mg/kg, chromium was 0.016-0.495 mg/kg and nickel was 0.027-0.608 mg/kg, respectively. The Limit of detection(LOD), Limit of quantification(LOQ) and correlation coefficient(R2) for heavy metals(Pb, Cd, Hg, As, Cr and Ni) were 0.38-0.66 μg/kg, 1.21-2.09 μg/kg and 0.9999-1.0000, respectively. The recovery results and coefficient of variations were in the range 91.3-103.5% and 2.82-4.50%, by tested certified reference materials(CRM) and spiked standard solutions. For risk assessment, daily intakes of heavy metals were calculated and compared with provisional tolerable weekly intake(PTWI) or provisional tolerable monthly intake(PTMI) established by the Joint FAO/WHO Expert Committee on Food Additives(JECFA). Therefore, the level of overall dietary exposure to heavy metals for Korean through from these results, conforming with increase of milling degree of rice, heavy metal concentration tended to decrease. The contents of heavy metal were decreased 57.7% in lead, 13.0% in cadmium, 50.3% in mercury, 38.2% in arsenic, 59.1% in chromium and 48.5% in nickel in according to the highest milling degree of 9.6%(polished rice). The reduction rate of heavy metals were as Cr>Pb>Hg>Ni>As>Cd.
고정층 가스화 용융로에서의 고상폐기물 가스화 합성가스 생산 및 가스엔진 발전 연구
구재회(Gu, Jae-Hoi),김수현(Kim, Su-Hyun),유영돈(Yoo, Young-Don),윤용승(Yun, Yong-Seung),이협희(Lee, Hyup-Hee),남상익(Nam, Sang-Ik),윤재관(Yoon, Jae-Kwan) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
The 3 ton/day-scale pilot plant consists of compressor, feed channel, fixed bed type gasification & melting furnace, quench scrubber, demister, flare stack and gas engine. Syngas composition of gasification using the 35.50(waste I), 4.34%(wasteII) moisture-containing solid waste showed waste I CO 25-35%, 20-40% hydrogen, waste II 25-35%, 20-30% hydrogen. Gasification melting furnace was operated 1,500{sim}1,600^{cdot}C. Gas engine was generated 35{sim}40 kW as waste gasification syngas.
소각로 인근에서 재배되는 농산물의 다이옥신류 모니터링 및 위해도 평가에 관한 연구
신희창 ( Hee-chang Shin ),홍경숙 ( Kyong-suk Hong ),안재민 ( Jae-min An ),윤혜정 ( Hye-jeong Yun ),김성연 ( Sung-youn Kim ),유경은 ( Kyung-eun Yu ),윤재돈 ( Jae-don Yun ),이재훤 ( Jae-hwon Lee ),김동호 ( Dong-ho Kim ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
Dioxins(PCDDs; Polychlorinated dibenzo-p-dioxins, PCDFs; Polychlorinated dibenzofurans) are accumulated in the body through the food as a representative environmental pollutants. Dioxins are flowed into the environment through the incineration of chemical products and electrical products containing PCBs. Dioxins generated from incinerators can pollute the atmosphere and soil, and it were accumulated in the body through food. Therefore, the dioxins monitoring of agricultural products produced near incinerators are required to ensure the safety of agricultural products. In this study, the analysis of dioxins was carried out on the basis of the law of the U.S Environment Protection Agency (EPA) Method 1613 and Korean Food Standards Codex Method SOP. The fifty agricultural products were collected in the field around the incinerators. As a result, the concentration range of detected dioxins was (0.0507~0.5824) pg/g. In the range of concentrations that reflect the toxic equivalent factor is (0.00002~0.01631) TEQ pg/g. The contribution of agricultural products to the dioxins intake is not equally distributed: tomato (74%), Corn (15%), Cabbage (9%), Green pepper (2%), red pepper (0.04%), Blueberries (0.0006%). The estimated daily intake of Korean Population through agricultural products was 0.00430 pg TEQ/kg body weight/day, and it was estimated at about 0.11% of tolerable daily intake(TDI) of Korea. Consequently, Dioxins exposure levels of agricultural products produced near incinerators has been found to be very safe.
능이버섯 가공품이 스테이크용 우육의 품질에 미치는 영향
배윤환,이종숙,이경아,윤재돈,강동헌,이재성 동아시아식생활학회 2002 東아시아食生活學會誌 Vol.12 No.4
The possibility of using the dried powder form of Sarcodon aspratus fruitbody (a kind of mushrooms) as a meat tenderizer was explored in this study. The freeze-dried powder had higher protease activity compared to the hot air dried powder of S. aspratus. The powder kept higher activity when preserved at -20℃ than at ambient temperature. The hardness of the meat decreased and the cooking loss increased more rapidly when the meat was treated with the mushroom powder at ambient temperature than at -41℃. In terms of sensory evaluation, 0.1% of the powder based on the meat and 3 hours of treatment at 4℃ gave the highest acceptability score. In the comparison test, the meat was more acceptable when treated with the mushroom powder than with the imported commercial tenderizer. This led to the conclusion that it is quite feasible to develop a natural meat tenderizer using the Sarcodon aspratus fruitbody.