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Liu Peng,Liu Wen,Li Qiang,Yang Li,Duan Min,Dai Yue 보안공학연구지원센터 2014 International Journal of u- and e- Service, Scienc Vol.7 No.6
For the problem that the use effect of food processing information system is poor due to absence of knowledge acquisition measures and knowledge self-updating function, a knowledge acquisition approach based on rough set is put forward. First, the approach establishes a set of predicted samples for the relationship between food processing parameters and product quality; then uses the discretization of continuous attribute, attribute reduction and rule extraction algorithm of rough set to acquire automatically predicted knowledge from a large number of predicted sample sets, and then saves the predicted knowledge in the knowledge base of expert system; finally, realizes the extraction of knowledge of food processing process based on the inference engine, which greatly enhances the effectiveness and practicality of the acquired knowledge in online aided decision system of the food processing quality and safety.
야생산사(Crataegus pinnatifida Bunge)과육 용매별 추출물의 항산화 효과
Duan Yishan,김민아(Min-A Kim),성종환(Jong-Hwan Seong),이영근(Young-Guen Lee),김동섭(Dong-Seob Kim),정헌식(Hun-Sik Chung),김한수(Han-Soo Kim) 동아시아식생활학회 2014 동아시아식생활학회지 Vol.24 No.3
Haw(Crataegus pinnatifida Bunge) belongs to the rose family and has beneficial health effects such as anti-obesity and gastroprotective activities. This study compared the antioxidative activities of various solvent extracts from haw. After removing seeds, pulpy was extracted with 70% methanol, 70% ethanol, chloroform :methanol(CM, 2:1, v/v), n-butanol, and ethyl acetate(EA). Total phenol contents were 71.46, 70.41, 47.63, 47.49 and 45.95 ㎎/g in the 70% methanol, 70% ethanol, CM, n-butanol and EA extracts, respectively. Total flavonoid contents of CM and n-butanol extracts were higher compared to other extracts at 1.63 ㎎/g and 1.59 ㎎/g, respectively, whereas EA extract had the lowest flavonoid content at 1.12 ㎎/g. Corresponding to total phenol contents, among NO2 radical scavenging activity, antioxidant activity by β-carotene bleaching assay, and superoxide dismutase(SOD)-like ability, 70% methanol and 70% ethanol extracts showed higher antioxidative activities than the other extracts. However, the lowest activities were n-butanol extract in NO2 radical scavenging activity as well as EA extract in antioxidant activity by β-carotene bleaching assay and SOD-like ability. These results suggest that haw extracts are available as a new natural antioxidant, and its activities are attributed to antioxidant substances such as phenolic compounds and flavonoids.
야생산사(Crataegus pinnatifida BUNGE)씨 생리활성물질의 산화억제 효과
Duan Yishan,김민아(Min-A Kim),김한수(Han-Soo Kim),성종환(Jong-Hwan Seong),이영근(Young-Guen Lee),김동섭(Dong-Seob Kim),정헌식(Hun-Sik Chung) 한국생명과학회 2014 생명과학회지 Vol.24 No.4
본 연구에서는 야생산사씨의 항산화 활성을 알아보고자 70% methanol, 70% ethanol, chloroform:methanol (CM, 2:1, v / v), n-butanol, ethyl acetate (EA) 용매로 추출하여, 시료 농도 0.2 mg/ml, 0.5 mg/ml, 0.8 mg/ml에서 측정 비교 하였다. DPPH, reducing power, FRAP 및 ABTS radical 소거활성은 70% methanol, 70% ethanol, EA, CM, n-butanol 추출물 순으로 높게 측정되어 모두 같은 경향을 나타내었다. 특히, DPPH에서 70% methanol 추출물은 18.22%~65.42%, 70% ethanol 추출물은 15.97%~60.25%의 우수한 radical 소거 활성을 보였다. NO radical 소거 활성은 n-butanol, EA, CM, 70% methanol, 70% ethanol 추출물 순으로 나타났으며, OH- radical 소거활성은 n-butanol, 70% methanol, 70% ethanol, CM, EA 추출물 순으로 측정되었다. 모든 용매 추출물은 대조군으로 사용한 표준물질에 비해서는 유의적으로 항산화 활성이 낮은 것으로 나타났다. 산사씨 용매 추출물 중 70% methanol 및 70% ethanol 추출물의 항산화 활성이 대부분 높은 경향이었다. 따라서 산사씨는 우수한 천연 항산화제로 활용이 가능할 것으로 사료된다. Haw (Crataegus pinnatifida BUNGE) is a medicinal plant commonly used in Korea due to its beneficial health effects. This study was performed to investigate the antioxidative activity of bioactive components from haw seed. Freeze-dried seed was processed with various solvents such as 70% methanol, 70% ethanol, a mixture of chloroform and methanol (2:1, v / v), n-butanol and ethyl acetate (EA). DPPH, reducing power, ferric reducing antioxidant power (FRAP), and ABTS radical scavenging activity decreased in this order: 70% methanol, 70% ethanol, EA, CM, n-butanol extracts. NO radical scavenging activity was high in the n-butanol extract (36.73% in 0.8 mg/ml concentration) and low in the 70% ethanol extract (24.96% in 0.8 mg/ml concentration). OH- radical scavenging activity of n-butanol extract (40.42% in 0.8 mg/ml concentration) was higher than the other extracts, but EA extract was the lowest (13.39%) at the same concentration. The results show that each extract contained various antioxidative substances and it seemed that different influence at each antioxidative activity.
수박(Citrullus vulgaris L.) 외피의 항산화 활성 탐색
( Duan Yishan ),김민아 ( Min A Kim ),김한수 ( Han Soo Kim ),장성호 ( Seong Ho Jang ),강동수 ( Dong Soo Kang ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.7
Watermelon (Citrullus vulgaris L.) is a summer fruit typical to help fatigue systemic absorption is getting better. The goal of this study is to screen antioxidant activity to ensure the possibility as a functional material for exocarp of watermelon. Watermelon was extracted with 70% methanol, 70% ethanol, chloroform: methanol (CM, 2:1, v/v). Total phenol contents were 12.01 mg/g, 8.89 mg/g, 3.53 mg/g in the 70% methanol, 70% ethanol, CM, in that order, respectively. Total flavonoid content, DPPH radical scavenging activity, ABTS radical scavenging activity, ferric reducing antioxidant power (FRAP), β-carotene bleaching assay were 70% methanol extract remarkably higher than the other extracts. And these results showed the same trend of total phenol content. From the above results shows that watermelon was effective on the antioxidative activity.
Donggyu Min,Sunghun Chung,Chulho Lee,Wenjing Duan 한국경영정보학회 2023 한국경영정보학회 학술대회논문집 Vol.2023 No.11
Despite the widespread use of artificial intelligence (AI) in mobile healthcare apps, the need for more transparency in AI algorithms hinders their effectiveness by preventing users from understanding the reasons behind AI-based information provision. To address this challenge, various types of explainable AI (XAI) are adopted to offer transparent explanations of AI. Despite significant debates surrounding AI intervention, limited research has been devoted to whether and how various XAI types affect user behavior differently. In this study, we conducted a randomized field experiment to investigate the effectiveness of three XAI algorithms: 1) feature importance, 2) feature attribution, and 3) counterfactual explanation in promoting users' health behavior. Drawing on the self-regulated learning theory, we expect that XAI focusing on counterfactual explanation increases strategic planning and outcome expectancy, resulting in better self-regulation behavior. Our findings indicate that counterfactual explanation significantly improves users' action planning behavior, leading to a 16.5% increase in workout duration and a 3.49% increase in health records compared to the control group. Our results are salient for users with a high level of AI susceptibility due to age, goal weight loss, and AI outcome. Our finding sheds light on the potential of algorithmic explanations to improve the effectiveness of AI interventions in the healthcare industry, with practical implications for designing more transparent and user-friendly healthcare apps.
‘‘Anode-free” Zn/LiFePO4 aqueous batteries boosted by hybrid electrolyte
Jingying Duan,Luofu Min,Mengqian Wu,Ting Yang,Mingming Chen,Chengyang Wang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
Aqueous rechargeable batteries with Zn as anode directly have become prospective alternatives to conventionallithium-ion batteries. However, the growth of zinc dendrites restricts the practical applicationof Zn anode greatly. In addition, the use of thick zinc foil as anode also increases the total weight of thebattery and impacts the whole energy density. Herein, a kind of ‘‘anode-free” Zn/LiFePO4 battery (zeroexcessZn) is designed to solve such problems, and corresponding electrolyte is optimized to ensurethe electrochemical performance. As a result, ethylene glycol (EG) is added to the aqueous electrolytewith 1.5 M Zn(CF3SO3)2 and 1.5 M LiCF3SO3 as solutes, which not only improves the stability of the electrolyte,but also inhibits the growth of zinc dendrites. And the Zn/Cu batteries with 70 vol% EG/H2Ohybrid electrolyte show highly reversible Zn plating/stripping process, in which the average coulombicefficiency (ACE) is as high as 99.77 % at a current density of 1 mA cm2. In order to better adapt to the‘‘anode-free” Zn/LiFePO4 battery system, the ratio of Zn2+ to Li+ ions in this electrolyte is further optimized,and it’s found that the battery with 2 M Zn(CF3SO3)2 + 1 M LiCF3SO3-70 vol% EG/H2O electrolyteshows the most excellent electrochemical stability, in which the capacity retention rate is 75.2 % after100 cycles at a current density of 1 mA cm2. Our work makes it possible for the application of aqueous‘‘anode-free” batteries.
Tang, Min,Hou, Yan-Li,Kang, Qiang-Qiang,Chen, Xing-Yue,Duan, Li-Qun,Shu, Jin,Li, Shao-Lin,Hu, Xiao-Li,Peng, Zhi-Ping Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.4
Recently, the main therapy of medullary thyroid cancer (MTC) is surgical, but by which way there is a poor prognosis with a mean survival of only 5 years. In some cases, some researchers found that it is the medullary thyroid cancer stem cells (MTCSCs) that cause metastasis and recurrence. This study aimed to eradicate MTCSCs through administration of all-trans-retinoic acid (ATRA). Here we demonstrate that MTCSCs possess stemlike properties in serum-free medium. The ABCG2, OCT4 and sodium iodide symporter (NIS) were changed by ATRA. Additionally, we found that ATRA can increase the expression of NIS in vivo. All the data suggested that ATRA could increase the iodine uptake of MTCSCs through NIS.
연구논문 : 자생 산사(Crataegus pinnatifida BUNGE)씨의 추출 용매에 따른 항산화 활성
김민아 ( Min A Kim ),( Duan Yishan ),성종환 ( Jong Hwan Seong ),정헌식 ( Hun Sik Chung ),김한수 ( Han Soo Kim ) 한국식품조리과학회(구 한국조리과학회) 2014 한국식품조리과학회지 Vol.30 No.1
The purpose of this study was to examine the antioxidative activity of feral haw (Crataegus pinnatifida BUNGE) seed extracts using 70% methanol, 70% ethanol, chloroform:methanol (CM, 2:1, v/v), n-butanol and ethyl acetate (EA). The total phenol content of the five extracts ranged from 37.29 mg/g to 55.53 mg/g. Moreover, the content was high in the 70% methanol and, 70% ethanol extracts, but low in the n-butanol extract. On the contrary, the total flavonoid content decreased in the order of n-butanol (2.93 mg/g), EA (2.67 mg/g), 70% methanol (1.00 mg/g), 70% ethanol (0.88 mg/g) and CM (0.67 mg/g) extracts. The NO2 radical scavenging activity, antioxidant activity by β-carotene bleaching assay and, superoxide dismutase (SOD) like ability decreased in the order of 70% methanol, 70% ethanol, CM, EA and, n-butanol extracts; further, a similar tendency was also observed in the total phenol contents. Overall, these results indicated that the antioxidative activity of feral haw seeds was closely related to the total phenol and flavonoid contents. Therefore, haw seeds might be usefully applied to natural antioxidants as well as functional foods