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윤주안,이한준 한국데이터정보과학회 2023 한국데이터정보과학회지 Vol.34 No.5
쌀은 국내 농산물 중 압도적으로 생산 비중이 높은 작물이다. 쌀 수급 안정은 매년 주요 국정 과제이며 쌀 수급 정책 수립을 위한 수확량 예측이 매우 중요하다. 그럼에도 불구하고 타 농산물 대비 관련 연구가 부족한 실정이며 기존 연구들 또한 예측 정확도 측면에서 개선의 여지가 많다. 이에 본 연구에서는 moderate resolution imaging spectroradiometer (MODIS) 데이터셋을 통해 normalized difference vegetation index (NDVI), enhanced vegetation index (EVI)와 같은 식생지수를 기상 데이터와 함께 수집하고, 시계열적 특성을 고려한 딥러닝 기법인 BiLSTM을 활용하여 쌀생산량 예측 모델을 제안하였다. 본 연구의 결과는 쌀 수급 정책 의사결정에 유용한 근거자료로 활용될 수 있을 것이다. Rice is overwhelmingly the most produced crop in domestic agriculture. Ensuring stable rice supply is a major national priority every year, and accurate prediction of rice harvests is crucial for formulating rice supply policies. However, research in this area is relatively scarce compared to other agricultural crops, and existing studies also have significant room for improvement in terms of prediction accuracy. In this study, we collected moderate resolution imaging spectroradiometer (MODIS) dataset, including vegetation indices such as normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI), along with meteorological data. We proposed a rice production forecasting model using a deep learning technique called BiLSTM, taking into account the temporal characteristics. The results of this study can serve as valuable empirical evidence for decision-making in rice supply policies.
흑맥문동 지상부와 뿌리 추출물의 산화방지 효과 및 세포독성 평가
손여완 ( Yeo Wan Son ),강스미 ( Smee Kang ),이지선 ( Ji Sun Lee ),윤주안 ( Ju An Youn ),장매희 ( Mae Hee Chiang ) 강원대학교 농업생명과학연구원 2022 강원 농업생명환경연구 Vol.34 No.1
Ophiopogon planiscapus ‘Nigrescens’ is a perennial gardening plant, the bioactivities of which have rarely been studied. In the present study, the antioxidant activity and cytotoxic effect on intestinal cells of O. planiscapus were investigated. Methanol extracts were prepared from the aerial parts and roots of O. planiscapus and scavenging activities were investigated using the 1,1-diphenyl-2-picrylhydrazyl and 2,2΄-azobis-(3-ethylbenzothiazoline-6-sulfonic-acid) radicals, Fenton reaction-induced lipid peroxidation, and Fe<sup>2+</sup> ion chelation assays, and cytotoxicity was evaluated against HCT 116 human colon cancer and INT-407 human normal intestinal cells. Total polyphenol and flavonoid levels were significantly higher in the root extracts of O. planiscapus than in the aerial parts. Scavenging activities against 1,1-diphenyl-2-picrylhydrazyl and 2,2΄ -azobis-(3-ethylbenzothiazoline-6-sulfonic-acid) radicals of the root extracts (IC<sub>50</sub> values of 0.32 and 0.16 mg/mL, respectively) were also more potent than those of the aerial part extracts (IC<sub>50</sub> values of 1.19 and 0.41 mg/mL, respectively). However, nitrite scavenging activities of both extracts were not significantly different. Both extracts inhibited the Fenton reaction-induced lipid peroxidation through reducing thiobarbituric acid reactive substances and by chelating the Fe<sup>2+</sup> ion. The extracts from the roots and aerial parts of O. planiscapus also exhibited concentration-dependent cytotoxicity against HCT 116 human colon cancer (IC<sub>50</sub> of 51.6 and 98.4 μg/mL, respectively) and INT human normal intestinal (IC<sub>50</sub> of 75.2 and 107.4 μg/mL, respectively) cells. Both extracts showed significantly higher potency to HCT 116 colon cancer cells. These results indicate that the extracts from roots and aerial parts of O. planiscapus contain biologically active compounds and can be used as a dietary source with health benefits.