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고영환,이은현,장규섭 충남대학교 농업과학연구소 1996 농업과학연구 Vol.23 No.2
In order to improve the production yield of kindorase as complex antiphlogistic agent, molecular weight of concentration membrane, membrane configration, temperature, pressure and pH of concentration solution, fouling, etc. were investigated, and the results obtained are as follows ; 1. High production yield was shown using 10k Dalton molecular weight cut-off concentration membrane and spiral membrane made of polysulfone. 2. And it was reasonable conditions for maintaining the concentration solution at 3Bar in pressure. 3. The optimum pH of solution for improving production yield of kindorase were the range of 7.5 to 8.5, and for obtaining better production yield, clean in place(C.I.P) of membrane was treated with 0.1N NaOH at 40 to 50℃ for 30minutes.
방울토마토중 Dichlofluanid 및 Iprodione의 생산단계별 잔류농약 경시변화
최규일,성기용,정태균,이주환,허장현,고광용,이규승 한국환경농학회 2002 한국환경농학회지 Vol.21 No.4
방울토마토의 생산단계에서의 잔류허용기준 설정과 수확후 저장기간중 경시변화 및 세척에 의한 잔류농약의 감소양상을 파악하였다. 해당약제를 안전사용기준의 기준량 및 배량을 각각 시설재배 포장에서 살포후 10일간 잔류양상을 조사하였고, 실온 및 냉장조건 하에서의 저장실험 및 세척에 따른 전류농약의 잔소량을 파악하여 생산단계부터, 출하, 저장, 소비단계까지의 잔류량을 예측할 수 있는 모델개발을 위한 자료로 이용하고자 연구를 수행하였다. Dichlofluanid와 iprodione은 포장조건에서 반감일수가 기준량 2.2, 3.3일 이었으며, 배량은 3.5, 5.4일로 나타났다. 저장조건하에서의 약제별 반감기는 포장조건보다 잔류량의 감소속도가 느린 것으로 나타나 반감일수가 증가하였고, 세척방법에 의한 잔류농약의 감소량을 조사한 결과 세제 사용시의 평균제거율은 dichlofluanid는 73.7%, iprodione은 64.3%로 나타났고, tap-water 사용시에는 dichlofluanid 73.5%, iprodione 63.5%로 나타났다. 이러한 결과는 작물의 생산단계에서 구한 합리적인 희귀식을 이용하여 잔류농약의 경시변화를 파악하고, 저장 및 세척과정을 거쳐 최종 소비단계에서의 잔류농약의 수준을 평가할 수 있었다. We studied the residual patterns of two fungicides, dichlofluanid and iprodione, in cherry tomato greenhouse after applying with the recommended and double dose. Also, the degradation patterns during storage periods of up to ten days were compared between at room temperature (20℃) and at cold temperature (4℃). Removal rates of fungicides by washing with tap-water and detergent solution (0.1%, 0.2%) were measured. Half-lives of dichlofluanid and iprodione in greenhouse cherrytomato were 2.2~3.5 and 3.3~5.4 days, respectively. During the storage period, the residues were dissipated more slow. Removal rates were 62.8~80.3% by tap-water, 60.4~83.1% by 0.1% detergent solution, and 65.3~77.6% by 0.2% detergent solution. So, we can predict of terminal residues from cultivation period to marketing, storage and consuming.
편심하중 작용시 극한해석 상계법을 이용한 얕은 기초의 지지력 분석
상현규,류권일,고영헌,김팔규 忠南大學校 産業技術硏究所 2001 산업기술연구논문집 Vol.16 No.2
In the study the bearing capacity of the eccentrically loaded shallow footing is estimated by means of the upper bound method of limit analysis. In the case of applying the upper bound, the results depend on the failure mechanism. So the failure surface is correctly studied through the model test using sand. New method is proposed to estimate the bearing capacity of the eccentrically loaded shallow footing by means of the upper bound method to apply the failure mechanism based on the model test. The propriety of new method is verified by the results of various methods. And the influences of the variables eccentricity, embedment depth, variations of contact width factor by model test using sand are also studied in this paper
최명진,고영현,상현규,김팔규 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1
Lately,the study of the soil behavior and mainly related to the degree of saturation. But most soils in the ground actually exist not in the saturated condition but in the unsaturated one. The foundation bases adn the soils used for construction material are almost such unsaturated soil as granite soil in Korea. The griaxial test are used in order to examine the strength characters of the unsaturated soil in this research, reappeared in-situ field condition for the undaturated soil through the UU-test in the laboratory and examined strength character. The variation of shear strength accrding to the increase of the degree of saturation is measured as the result and the proposed formula are suggested