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Trigonelline protects the cardiocyte from hydrogen peroxide induced apoptosis in H9c2 cells

Asian Pacific Journal of Tropical Medicine 2015年第4期8卷 263-268页

作者： Soundharrajan Ilavenil Da Hye kim Young-Il Jeong Mariadhas Valan Arasu Mayakrishnan Vijayakumar Ponnuraj Nagendra Prabhu Srisesharam Srigopalram ki choon choi Grassland and Forage division National Institute of Animal ScienceRDA The United Graduate School of Agricultural Sciences Tottori University School of Medicine Pusan National University Department of Botany and Microbiology Addiriyah Chair for Environmental StudiesCollege of ScienceKing Saud University Department of Animal Sciences University of Illinois Department of Horticulture Sunchon National University

Objective:To elucidate the key parameters associated with hydrogen peroxide induced oxidative stress and investigates the mechanism of trigonelline(TG)for reducing the H_2O_2induced toxicity in H9c2 ***:Cytotoxicity and antioxidant activity of TG was assessed by EZ-CYTOX *** extraction and cDNA synthesized according to the kit manufacture *** was measured by the Flowcytometry,general PCR and ***:It was found that the TG significantly rescued the morphology of the H9c2 *** of cells with TG attenuated H_2O_2 induced cell deaths and improved the antioxidant *** addition,TG regulated the apoptotic gene caspase-3,caspase-9 and anti-apoptotic gene ***-XL during H_2O_2 induced oxidative stress in H9c2 *** results were comparable with quercetin *** evident,flow cytometer results also confirmed the TG significantly reduced the H_2O_2 induced necrosis and apoptosis in H9c2 ***,further increment of TG concentration against H_2O_2 could induce the necrosis and apoptosis along with H_2O_***:It is suggested that less than 125μM of TG could protect the cells from H_2O_2 induced cell damage by down regulating the caspases and up regulating the Bcl-2 and Bcl-XL ***,we suggest the trigonelline could be useful for treatment of oxidative stress mediated cardiovascular diseases in future.

关键词： Trigonelline H9c2 cells Antioxidant Apoptosis Cardiovascular diseases

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Productivity and Nutritive Values of Sorghum×Sudan Hybrid（SSH） Under SSH-Based Double Cropping Systems in Paddy Land

Productivity and Nutritive Values of Sorghum×Sudan Hybrid（...

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The 3rd Korea-China-Japan Joint Symposium on Grassland Agriculture and Livestock Production

作者： Nam Chul Jo ki choon choi Sang Pil Na Chang Yoon Wan Bang Yook National Institute of Animal Science RDASeonghwan-EupCheonan-SiChungnam 330-801 Korea College of Animal Bioscience and Technology Konkuk University Dept.of Animal Resources and Biotechnology Chonbuk National University

＜正＞This study was carried out to investigate the productivity and nutritive values of SSH under Double-cropping SSH followed by whole crop barley（SSFWB） or by Hairy vetch（SSFHV） in paddy land.A field study was conducted at Baeksan-myeon,kimje,Jeonbuk province in Korea on clay loam soil for 3 *** plots were arranged in completely randomized design with three *** yield of SSH in SSFWB treatment was higher than that of SSFHV（P＜0.05）.All nutrients values of SSH were not influenced by the cropping ***,all nutrients of SSH in SSFWB treatment were just a little increase,compared with those of SSFHV.

关键词： Cattle slurry Cropping system Sorghum x Sudan hybrid Hairy vetch Nutritive value

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Properties of Soil and Leaching Water Under Sorghum×Sudan Hybrid-Based Double Cropping Systems in Paddy Land

Properties of Soil and Leaching Water Under Sorghum×Sudan H...

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The 3rd Korea-China-Japan Joint Symposium on Grassland Agriculture and Livestock Production

作者： Nam Chul Jo ki choon choi Sang Pil Na Chang Yoon Yang Seung Hak Wan Bang Yook National Institute of Animal Science RDASeonghwan-EupCheonan-SiChungnam 330-801 Korea College of Animal Bioscience and Technology Konkuk University Dept.of Animal Resources and Biotechnology Chonbuk National University

This study was carried out to investigate the properties of soil and water under Double-cropping SSH followed by whole crop barley(SSFWB) or by Hairy vetch(SSFHV) in paddy land.A field study was conducted at Baeksan-myeon,kimje,Jeonbuk province in Korea on clay loam soil for 3 *** plots were arranged in completely randomized design with three *** pH and the contents of T-N and organic matter (OM) in soil samples collected at the end of the experiment were remarkably higher than those at the beginning of the experiment in both SSFWB and SSFHV treatment(P<0.05).The contents of an exchangeable cations at the end of the experiment were remarkably higher than those at the beginning of the experiment in both SSFWB and SSFHV (P<0.05).And then,the concentration of NO-N,NH-N and PO-P in discharge and leaching water were not influenced by the cropping system

关键词： Cattle slurry Sorghum x Sudan hybrid Hairy vetch Soil properties Leaching water

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The IOSS Chaos Synchronization Method

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Chinese Physics Letters 2011年第1期28卷 32-35页

作者： choon ki Ahn Faculty of the Department of Automotive Engineering Seoul National University of Science&Technology172 Gongneung 2-dongNowon-guSeoul 139-743Korea

A new synchronization method, called the input/output-to-state stable synchronization (IOSSS) method, is proposed for a general class of chaotic systems with external disturbance. By introducing Lyapunov stability theory and linear matrix inequality (LMI) for the first time, the IOSSS controller is shown to not only guarantee the synchronization of the chaotic systems, but also reduce the effect of external disturbance. The proposed IOSSS controller can be obtained by solving the LMI, which can easily be done using standard numerical packages. A numerical example is given to demonstrate the availability of the proposed method.

关键词： method chaotic inequality

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L_2-L_∞ learning of dynamic neural networks

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Chinese Physics B 2010年第10期19卷 1-6页

作者： choon ki Ahn Department of Automotive Engineering Seoul National University of Technology 172 Gongneung 2-dong Nowon-gu Seoul 139-743 Korea

This paper proposes an y2-y∞ learning law as a new learning method for dynamic neural networks with external disturbance. Based on linear matrix inequality （LMI） formulation, the y2-y∞ learning law is presented to not only guarantee asymptotical stability of dynamic neural networks but also reduce the effect of external disturbance to an y2-y∞ induced norm constraint. It is shown that the design of the y2-y∞ learning law for such neural networks can be achieved by solving LMIs, which can be easily facilitated by using some standard numerical packages. A numerical example is presented to demonstrate the validity of the proposed learning law.

关键词： y2-y∞ learning law dynamic neural networks linear matrix inequality Lyapunovstability theory

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Chaos Synchronization of Nonlinear Bloch Equations Based on Input-to-State Stable Control

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Communications in Theoretical Physics 2010年第2期53卷 308-312页

作者： choon ki Ahn Faculty of the Division of Electronics and Control Engineering Wonkwang University

In this paper, we propose a new input-to-state stable （ISS） synchronization method for chaotic behavior in nonlinear Bloch equations with external disturbance. Based on Lyapunov theory and linear matrix inequality （LMI） approach, for the first time, the ISS synchronization controller is presented to not only guarantee the asymptotic synchronization but also achieve the bounded synchronization error for any bounded disturbance. The proposed controller can be obtained by solving a convex optimization problem represented by the LMI. Simulation study is presented to demonstrate the effectiveness of the proposed synchronization scheme.

关键词： chaos synchronization input-to-state stable (ISS) control nonlinear Bloch equations linear matrix inequality (LMI) Lyapunov theory

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A Passivity Based Synchronization for Chaotic Behavior in Nonlinear BlochEquations

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Chinese Physics Letters 2010年第1期27卷 56-59页

作者： choon ki Ahr Faculty of the Division of Electronic and Control Engineering Wonkwang University 344-2 Shinyong-dong Iksan 570-749 Korea

We propose a new passivity based synchronization scheme for chaotic behavior in nonlinear Bloch equations. Based on the Lyapunov theory and linear matrix inequality （LMI） approach, for the first time, the passivity based controller is presented to guarantee stable synchronization. The proposed controller can be obtained by solving a convex optimization problem represented by an LMI. A numerical example is given to demonstrate the effectiveness of the proposed synchronization scheme.

关键词： Chinese climate network complex systems small world community

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DC Motor Speed Regulator via Active Damping Injection and Angular Acceleration Estimation Techniques

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IEEE/CAA Journal of Automatica Sinica 2021年第3期8卷 641-647页

作者： Seok-Kyoon kim choon ki Ahn Department of Creative Convergence Engineering Hanbat National UniversityDaejeon 341-58Republic of Korea School of Electrical Engineering Korea UniversitySeoul 136-701Republic of Korea

This paper suggests a novel model-based nonlinear DC motor speed regulator without the use of a current *** current dynamics,machine parameters and mismatched load variations are *** proposed controller is designed to include an active damping term that regulates the motor speed in accordance with the first-order low-pass filter dynamics through the pole-zero ***,the angular acceleration and its reference are obtained from simple first-order estimators using only the speed *** effectiveness is experimentally verified using hardware comprising the QUBEServo2,myRIO-1900,and LabVIEW.

关键词： Active damping injection angular acceleration estimator DC motor(DCM) speed regulation

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H∞ stability conditions for delayed neural networks with external disturbances and norm-bounded uncertainties:Delay independent and dependent criteria

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Science China(Information Sciences) 2011年第8期54卷 1691-1701页

作者： choon ki AHN Department of Automotive Engineering Seoul National University of Science & Technology

In this paper,we propose new delay independent and dependent H ∞ stability conditions for delayed neural networks with external disturbances and norm-bounded *** conditions are presented to not only guarantee the asymptotical stability but also reduce the effect of external disturbance to an Hnorm constraint. The proposed conditions are represented by linear matrix inequalities （LMIs）.Optimal Hnorm bounds are obtained easily by solving convex problems in terms of *** applicability of these conditions is illustrated by numerical examples.

关键词： H_∞ analysis delayed neural networks uncertainty disturbance linear matrix inequality (LMI)

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Stabilization of linear systems with distributed input delay using reduction transformation

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Chinese Science Bulletin 2011年第13期56卷 1413-1416页

作者： choon ki Ahn Faculty of the Department of Automotive Engineering Seoul National Universty of Science and Technology

We propose a new stabilization method for linear systems with distributed input delay via reduction transformation and Riccati equation *** the presented stabilization scheme,the gain matrix of controller is constructed by the well-known linear control technique for delay-free *** transformation kernel matrix can be determined by solving the non-symmetric matrix Riccati equation backward with the boundary *** point delay systems are considered,it will be shown that the proposed control law degenerates to the standard one for input delay systems.

关键词：延迟系统线性系统分布式输入稳定 Riccati方程非线性控制技术矩阵构造

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