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고함량 사포나린 함유 보리 어린 순 재배를 위한 식물공장내 인공광 조건 및 사포나린 추출 분석법 최적화
오경열 ( Kyeong-yeol Oh ),송영훈 ( Yeong Hun Song ),이득영 ( Duek-yeong Lee ),이태근 ( Tae-geun Lee ),김진효 ( Jin-hyo Kim ) 한국응용생명화학회 2021 Journal of Applied Biological Chemistry (J. Appl. Vol.64 No.3
Saponarin is a crucial component of barley sprout, and the production and quantitative analysis are issued to date. In this study, the optimal saponarin extraction conditions were presented on the subject of acetonitrile, ethanol, methanol, and water for the quantitative analysis in barley sprout through the extraction efficiency compared with the solvent concentration and extraction time using the reaction surface methodology. The optimal extraction time and solvent condition for saponarin were 3.9 h and 53.7% of aqueous methanol, respectively. In addition, the effect of LED artificial light on the saponarin production in barley sprouts was evaluated by the light cycle, light quantity, and light quality. The optimal cultivation conditions under artificial light for the growth of barley sprout and saponarin production were most effectively achieved on 220-320 μmol m<sup>-2</sup> s<sup>-1</sup> of the light quantity with 8 h day<sup>-1</sup> of a daylight cycle under 6500K LED combined with red light. Furthermore, blue light was evaluated as the main factor in the biosynthesis of saponarin.
오경열(Kyeong Yeol Oh),구영민(Young Min Goo),정원민(Won Min Jeong),신승미(Seung Mi Sin),길영숙(Young Sook Kil),고건희(Keon Hee Ko),양기정(Ki Jeung Yang),김진효(Jin-Hyo Kim),이동열(Dong Yeol Lee) 한국생명과학회 2018 생명과학회지 Vol.28 No.12
감국(Chrysanthemum indicum L.)은 한방재료로서 식품 및 향기제품의 소재로 활용된다. 본 연구에서는 국내에서 육성된 감국 품종별 휘발성 향기성분을 분석 및 동정하여 이들이 함유하는 화학성분을 구명하고자 수행되었다. 국내에서 육성한 네 품종(품종명 : 감국 1호, 감국 2호, 감국 3호, 원향) 감국을 동일한 시기에 같은 지역(경상남도 산청군)에서 재배하여 수확한 후 GC-MS Headspace를 이용하여 향기성분을 분석하였다. 향기성분 분석 결과 네 품종에서 23종의 성분이 동정되었고, 이 중 8개의 화합물이 공통적으로 존재하였다. 감국 1호, 감국 2호, 감국3호에서는 3-carene, camphene, β-phellandrene, eucalyptol과 (+)-camphor로 등이 주요 향기성분으로 확인되었다. 감국 1호는 (+)-camphor (31.40%)를 포함하여 11개 화합물이 존재하였고, 감국 2호의 주요 향기성분으로는 camphene (25.60%)을 포함한 12개 화합물이 존재하였으며, 감국 3호는 (+)-camphor (26.88%) 등 13개 향기성분이 검출되었다. 원향에서는 주요 향기성분인 trans-piperitol (47.33%), sabinene, γ-terpinyl acetate을 포함한 17종류의 향기성분이 분석 되었다. 본 연구를 통해 감국 품종 간에 기능성 향기성분의 종류 및 비율의 차이가 있음을 확인하였고, 이러한 연구결과는 향후 다양한 향기제품의 산업화 소재로서 이용가치를 높일 수 있을 것으로 기대된다. This study investigated the chemical composition of four Korean cultivated Chrysanthemum indicum L. (Gamguk 1 ho, Gamguk 2 ho, Gamguk 3 ho, and Wonhyang) which are used in the food and fragrance industries to identify their volatile flavor compounds. These compounds were analyzed using headspace GC-MS from plant samples cultivated in the same region of Korea (Sancheong-gun, Gyeongsangnam-do). A total of 23 compounds were identified, eight of which were common across the four cultivars. The major flavor components in the three Gamguk plants were identified as 3-carene, camphene, β-phellandrene, eucalyptol and (+)-camphor. Eleven compounds, including (+)-camphor at 31.40%, were identified in Gamguk 1 ho. Gamguk 2 ho was found to contain 12 flavor compounds, predominant of which was camphene at 25.60%. Thirteen compounds including (+)-camphor (26.88%) were identified in Gamguk 3 ho, while 17 were detected in the Wonhyang cultivar, including trans-piperitol (47.33%), sabinene, and γ-terpinyl acetate. These results indicate differences in the type and ratio of functional volatile flavor ingredients in Chrysanthemum indicum L. cultivars which is highly valuable as material for fragrance product development.
약초 추출물과 그 분획물의 식물병원균에 대한 항진균 활성
오경열(Kyeong-Yeol Oh),정동규(Dong-Kyu Jeong),송영훈(Yeong Hun Song),이득영(Deuk-Yeong Lee),이동열(Dong-Yeol Lee),최근형,김세리,김진효(Jin-Hyo Kim) 한국농약과학회 2021 농약과학회지 Vol.25 No.4
This study was to discover the plant organic agricultural materials that can be used for disease control crops targeting phytopathogenic fungi. The antifungal activities of the ethanol extracts of 84 medicinal herbs and their fractions were screened and the antimicrobial active compounds in the extract were surveyed. The antifungal activities of the extracts were tested with the paper-disc diffusion method against R. solani, P. capsici, S. sclerotiomm, F. oxysporum and C. acutatum at 5 0 0mg L<SUP>-1</SUP>. The ethanol extracts of Acorus gramineus, Artemisia annua, Panax ginseng, Rehmannia glutinosa, Citrus unshiu, Platycodon grandiflorum, Xanthium strumarium, Morus alba, Pinus densiflora, Zingiber officinale and Atractylodes japonica inhibited over the three target fungi including R. solani, and S. sclerotiorum among them. The 11 bioactive ethanol extracts were separated with hexane, ethyl acetate and water layers by liquid-liquid partition. The organic solvent fractions of A. gramineus, P. ginseng, R. glutinosa, C. unshiu, Z. officinale and A. japonica and the aqueous fractions of A. anmua, P. grandiflorum, X. strumarium and P. densiflora showed more potent antifungal activity than the other fraction as well as the increment of the activity at the concentration of 500 mg L<SUP>-1</SUP>.
토양유기물 함량이 인삼근의 endosulfan 흡수이행에 미치는 영향
오경열 ( Kyeong-yeol Oh ),최근형 ( Geun-hyoung Choi ),배지연 ( Ji-yeon Bae ),이득영 ( Deuk-yeong Lee ),이성우 ( Sung-woo Lee ),김진효 ( Jin-hyo Kim ) 한국응용생명화학회 2020 Journal of Applied Biological Chemistry (J. Appl. Vol.63 No.4
The plant uptake of endosulfan, a new persistent organic pollutants from soil environment was investigated on ginseng through the field survey in Korea. The endosulfan residues in soil for this survey were ranged on 0.013-0.136 mg kg<sup>-1</sup>. The plant uptake factor (PUF) for endosulfan in ginseng was 0.243-1.708 and the highest PUF was found on 3-year-old ginseng. The PUF for endosulfan decreased in the longer cultivation period and it might be caused by the dilution effect of ginseng growth. In addition, the soil organic matter (SOM) content affected on the PUF negatively and Pearson correlation coefficient (r) between SOM and PUF was -0.7812 (p <0.05). Thus, higher SOM would positively affect to reduce the endosulfan residue in ginseng root.
시설재배 애호박 중 Dichlorvos와 Etofenprox 사용에 따른 경시적 잔류량 변화
오경열(Kyeong-Yeol Oh),배지연(Ji-Yeon Bae),이득영(Deuk-Yeong Lee),김영진(Yeong-Jin Kim),이동열(Dong-Yeol Lee),김진효(Jin-Hyo Kim) 한국농약과학회 2021 농약과학회지 Vol.25 No.1
Dichlorvos and etofenprox as insecticides were widely used for crop protection, but the residues of the pesticides in the fruit and the leaf of squash were not studied well. In here, the residues dissipation and the biological half-lives were investigated in the fruit and the leaf of squash. The residues of dichlorvos in the leaf and fruit of squash were detected 0.916-1.111 mg kg<SUP>-1</SUP> and 0.016-0.025mg kg<SUP>-1</SUP> on 0 day-after-treatment (DAT) respectively, but no detection showed after 3 DAT both in the fruit and in the leaf. The etofenprox residues were 0.075-0.098 mg kg<SUP>-1</SUP> and 6.378-7.443 mg kg<SUP>-1</SUP> on 0 DAT in the fruit and the leaf, but the residue concentration in the fruit was below the temporal maximum residue limit (0.2 mg kg<SUP>-1</SUP>) regardless of the harvest date. The half-lives of etofenprox in the fruit and the leaf were 3.5 and 7.1 day, respectively. In addition, the dietary exposure risks of etofenprox were estimated to 0.018% and 0.027% of acceptable daily intake (ADI) for all age group from the fruit and the leaf. Furthermore, the %ADI for the infant group (1-2-year-old, 0.044% ADI) and the elder age group (≥65-year-old, 0.031% ADI) were higher than all the age groups from the dietary of the fruit.
이득영 ( Deuk Yeong Lee ),오경열 ( Kyeong Yeol Oh ),김진효 ( Jin Hyo Kim ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
과불소화합물 (perfluorinated compounds, PFCs)은 1950년대부터 제지, 섬유, 전자산업 및 다양한 생활용품에 사용되고 있는 물질이다. 이들 중 perfluoroctanoic acid (PFOA), perfluorooctanoic sulfonate (PFOS) 및 각각의 유도체는 스톡홀름협약에서 잔류성유기오염물질 (persistent organic pollutants. POPs)로 지정되어 있다. 이들의 인체노출기여도는 식품을 통한 섭취가 가장 높은 것으로 보고되었다. 국내 농업환경 중 PFOA와 PFOS의 잔류는 ㎍ kg-1 이하로 보고되었으나, 농산물의 경우 오염된 토양과 물로부터 직접적인 흡수이행을 통한 오염축적 가능성이 높아 이들의 작물 흡수이행 평가가 중요하다. 본 연구에서는 상추의 연속수확에 따른 PFOA, PFOS 흡수이행을 평가하였다. 토양 1.0 용을 1% acetic acid (10 mL)로 추출한 후 4000 rpm에서 원심분리하여 상등액을 취하고, methanol/1% acetic acid (90/10, v/v)로 2회 반복하여 재추출 (10 mL<sup>x</sup>2) 한 뒤, 추출액을 15 mL까지 질소 농축하고, 증류수로 50 ml가 되도록 희석하였다. 희석액은 HLB(Hydrophilic-Lipophilic Balanced) 카트리지로 추출하였다. 추출 후 질소 농축하여 methanol로 재용해 후 EVNI-Carb™ 20 mg으로 정제하여 nylon filter로 여과하였다. 시료 정제 용액에 internal standard로 <sup>13</sup>C<sub>4</sub>-PFOA, <sup>13</sup>C<sub>4</sub>-PFOS를 넣어주고, LC-MS/MS를 이용하여 분석하였다. 상추는 무처리구, 저농도 (1.0 mg kg<sup>-1</sup>) 및 고농도 (5.0 mg kg<sup>-1</sup>) 처리구에 재배하여 1차, 2차 수확 후 분석하였다. 상추 10 g을 75% methanol (10 mL) 로 추출한 뒤 원심분리하여 상등액을 분취하고, tetrahydrofuran/water (75/25, v/v)를 이용하여 재추출 (10 mL<sup>x</sup>2) 한 뒤, 추출액을 15 mL까지 질소 농축하고, 중류수로 50 mL가 되도록 희석하여 토양과 같은 방법으로 추출 및 정제 후 LC-MS/MS를 이용하여 분석하였다. 저농도 및 고농도 처리구에서 연속수확 상추의 PFOA의 PUF (Plant uptake factor) 값은 1차 수확 시 1.026-2.235이었고, 2차 수확 시 0.882-2.891 이었다. PFOS 의 PUF값은 1차 수확 시 0.570-1.113, 2차 수확 시 0.252-1.148이었다. 저농도 및 고농도 처리구에서 연속 수확한 상추의 PFOA 및 PFOS의 PUF값은 1차와 2차 수확에서 큰 차이를 나타내지 않았다. PUF는 생물무게를 기준으로 제시하는 값으로 작물의 수분함량, 작물의 생육도에 따라 크게 달라질 수 있다. 따라서, 건물중을 기준으로 하는 생물농축계수 (Bioconcenration factor, BCF)에 대한 보완연구가 필요한 것으로 판단된다.
Linoleic Acid from Bamboo (Phyllostachys Bambusoides) Displaying Potent α- Glucosidase Inhibition
Sunin Jung(정성인),Su Tae Kang(강수태),Cheol Yong Choi(최철용),Kyeong Yeol Oh(오경열),Jung Keun Cho(조정근),Rajesh Rengasamy,Ki Hun Park(박기훈) 한국생명과학회 2009 생명과학회지 Vol.19 No.5
당가수분해효소 저해제는 2형 당뇨병, 암, 바이러스 감염제 개발의 주요 타켓화합물이 되고 있다. 본 연구에서는 기능성식품 소재로 이용될 수 있는 대나무 잎에서 α-glucosidase 저해제를 탐색하였다. 대나무 잎을 메탄올 용매로 추출하고, 이들을 핵산, 클로로포름, 부탄올로 용매분획 하였다. 용매 분획된 각 추출물의 α-glucosidase 저해활성을 검정시험에서 핵산 분획층에서 강한 α-glucosidase 저해활성(IC50 33.5 ㎍/ml)을 관찰하였다. 높은 저해활성을 보여준 핵산 분획층의 활성물질은 linoleic acid로 구조동정 되었다. 분리된 linoleic acid는 IC50이 12.4 ㎛로 높은 α-glucosidase 저해활성을 나타내었다. 저해활성 메커니즘 연구에서 linoleic acid는 비경쟁적 저해 양상을 나타내었다. 본 연구는 대나무가 α-glucosidase 저해활성을 나타내는 첫 번째 연구 결과이다. Glycosidase inhibitors are major targets in the treatment of type Ⅱ diabetes, cancer and viral infections. This study was carried out to investigate the glycosidase inhibitory substances from bamboo (Phyllostachys bambusoides). Bamboo was extracted with methanol and then further fractionated with n-hexane, chloroform, n-BuOH and aqueous to get an active fraction. All extracts were evaluated for α-glucosidase inhibitory activities to identify the n-hexane fraction with 33.5 ㎍/ml of IC50 value. Active compound 1 in the n-hexane fraction was identified as linoleic acid, which exhibited inhibitory activity with 12.4 ㎛ of IC50 value. Mechanistic analysis showed that linoleic acid exhibited noncompective inhibition. This is the first study in which bamboo is reported to show α-glucosidase inhibitory activity.
이득영(Deuk-Yeong Lee),배지연(Ji-Yeon Bae),오경열(Kyeong-Yeol Oh),류성기(Sung-Ki Ryu),김영진(Yeong-Jin Kim),김진효(Jin-Hyo Kim) 한국농약과학회 2021 농약과학회지 Vol.25 No.1
The residual characteristics of boscalid, fluxapyroxad, hexaconazole, pencycuron, pyraclostrobin, and thifluzamide were investigated on a carrot. The tested granular pesticides were 0.8% boscalid, 0.4% fluxapyroxad, 2% hexaconazole, 3% pencycuron, 0.25% pyraclostrobin, and 1% thifluzamide and they were applied on 4-12 kg 10 a<SUP>-1</SUP> before seedling to soil. From the experiments, pencycuron, pyraclostrobin and thifluzamide were not detected in carrot, while the maximum residue of boscalid was detected on 0.013 mg kg<SUP>-1</SUP> in the 12 kg 10 a<SUP>-1</SUP> treatment. In addition, the maximum residues of fluxapyroxad, and hexaconazole were detected 0.016 and 0.039 mg kg1, and 0.014 and 0.030 mg kg<SUP>-1</SUP> on 6 kg 10 a<SUP>-1</SUP> and 12 kg 10 a<SUP>-1</SUP>, respectively. All the detected residues were not exceeded the currently established maximum residue limit (MRL) on carrot, thus these granular pesticides would be available for use in the prevention of sclerotinia rot in carrots without residue risk.