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수확 후 에틸렌 및 광 처리에 의한 콩 잎 중 플라보노이드 함량 변화
공승헌(Seung-Heon Kong),이득영(Deuk-Yeong Lee),배지연(Ji-Yeon Bae),송영훈(Young-Hoon Song),박기훈(Ki-Hun Park),장기창(Ki-Chang Jang),김진효(Jin-Hyo Kim) 한국농약과학회 2018 농약과학회지 Vol.22 No.2
Light or ethylene treatment was reported as an efficient tool for enhancement of the secondary metabolites in crops. And isoflavone-rich soybean leaf production could be achieved by the treatment of ethephon or ethylene in pre-harvest stage. However, there was no report on the ethylene application effect on soybean leaf in post-harvest treatment. In here, the two elicitors for flavonoid production effect were investigated on soybean leaf during the post-harvest drying process. Ethylene treatment effectively induced total flavonoid contents (912–920 ㎎-QE 100 g<SUP>−1</SUP>) up to 28% in comparison with non-treatment (718 ㎎-QE 100 g<SUP>−1</SUP>). In addition, ethylene was needed for up to three hours initially at 60℃ during the drying process. On the other hand, light treatment including UV and visible lights negatively affected on the total flavonoid contents (738–792 ㎎-QE 100 g<SUP>−1</SUP>) up to 18% (p < 0.01) and the total phenol contents up to 27% (1,033–1,163 ㎎-QE 100 g<SUP>−1</SUP>).
에테폰의 관주처리와 엽면살포에 의한 콩 잎 중 잔류 안전성
공승헌 ( Seung-heon Kong ),이득영 ( Deuk-yeong Lee ),송영훈 ( Young-hoon Song ),박기훈 ( Ki-hun Park ),서우덕 ( Woo-duck Seo ),이동열 ( Dong-yeol Lee ),김진효 ( Jin-hyo Kim ) 한국응용생명화학회 2018 Journal of Applied Biological Chemistry (J. Appl. Vol.61 No.1
Ethephon is useful pesticide as ethylene precursor, which is an efficient plant hormone to produce functional secondary metabolites. However, the residual safety of ethephon was not studied on various crops. In here, the dissipation pattern of ethephon residue in soybean leaf was investigated both on the foliar and drenching applications. The biological half-lives of ethephon residues were 26.6, and 21.1 h on the once, and double foliar applications, respectively. Although the residue after three days from the final application was up to 60.6 mg kg<sup>-1</sup>, the residue was below the limit of quantitation on the dried soybean leaf. In addition, drenching application of ethephon could increase the residue up to 36.3 mg kg<sup>-1</sup> after 20.1 h from the application, however, the treatment would not affect to the total phenol content significantly (p >0.01).
Headspace 법을 사용한 유기농업자재 중 잔류 유기용매 분석
최근형(Geun Hyoung Choi),공승헌(Seung-Heon Kong),박병준(Byung-Jun Park),문병철(Byeong-Cheol Moon),김진효(Jin-Hyo Kim) 한국농약과학회 2016 농약과학회지 Vol.20 No.2
Volatile organic solvents are used to extract the bioactive materials from raw materials for environmentally-friendly farming materials (EFFM), but the solvent should not remain in EFFM for the safety reasons. Thus qualitative and quantitative analysis method for the solvents using Headspace-GC were evaluated. Water content depleted the detection ratio of hydrophilic solvents and disturbing the hydrophilic interaction with solvents by DMSO might be helped to increase the detection ratio (up to 715%). Surfactant concentration affected to the detection ratio (68.5-179.1%) while surfactant type was not deeply involved the solvent detection. On the other hand, matrix-matched calibration method was accepted the minimum requirements for the quantitative analysis of the solvents in EFFM.
계피 또는 데리스 추출물을 주원료로 하는 유기농업자재의 약효 성분 안정성
최근형(Geun-Hyoung Choi),진초롱(Cho-Long Jin),박병준(Byung-Jun Park),임성진(Sung-Jin Lim),노진호(Jin-Ho Rho),문병철(Byung-Cheol Moon),공승헌(Seung-Heon Kong),김진효(Jin Hyo Kim) 한국농약과학회 2016 농약과학회지 Vol.20 No.3
The stabilities of bioactive compounds in cinnamon or derris extract were investigated in commercial agricultural organic materials (biopesticide) during storage on different temperature conditions (0℃, 23℃, 35℃, 45℃℃, and 54℃). The selected bioactive compounds were cinnamaldehyde, and cinnamyl alchol in cinnamon extract and deguelin, and rotenone in derris extract. Half-lives of the total cinnamyl derivatives in biopesticide (A, B, C, and D) ranged from 15.1 to 46.2 days on the different temperature and cinnamaldehyde was more stable than cinnamyl alcohol in the biopesticide. The half-lives of total rotenoid ranged from 1.7 to 173 days on the different temperature in the tested biopesticide (E, F, and G) containing derris extract. The stabilities of deguelin, and rotenon in the biopesticide showed similar values in the same condition.