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Regulatory Role of cAMP Receptor Protein over Escherichia coli Fumarase Genes
Yu-Pei Chen,Hsiao-Hsien Lin,Chi-Dung Yang,Shin-Hong Huang,Ching-Ping Tseng 한국미생물학회 2012 The journal of microbiology Vol.50 No.3
Escherichia coli expresses three fumarase genes, namely, fumA, fumB, and fumC. In the present study, catabolite repression was observed in the fumA-lacZ and fumC-lacZ fusion strains, but not in the fumB-lacZ fusion strain. The Crp-binding sites in fumA and fumC were identified using an electrophoretic mobility shift assay and footprint analysis. However, the electrophoretic mobility shift assay did not detect band shifts in fumB. Fnr and ArcA serve as transcription regulators of fumarase gene expression. In relation to this, different mutants, including Δcya, Δcrp, Δfnr, and ΔarcA, were used to explore the regulatory role of Crp over fumA and fumC. The results show that Crp is an activator of fumA and fumC gene expression under various oxygen conditions and growth rates. ArcA was identified as the dominant repressor, with the major repression occurring at 0–4% oxygen. In addition, Fnr was confirmed as a repressor of fumC for the first time. This study elucidates the effects of Crp on fumarase gene expression.
One-Cycle Correction of Timing Errors in Pipelines With Standard Clocked Elements
Insup Shin,Jae-Joon Kim,Yu-Shiang Lin,Youngsoo Shin IEEE 2016 IEEE transactions on very large scale integration Vol.24 No.2
<P>One of the most aggressive uses of dynamic voltage scaling is timing speculation, which in turn requires fast correction of timing errors. The fastest existing error correction technique imposes a one-cycle time penalty only, but it is restricted to two-phase transparent latch-based pipelines. We perform one-cycle error correction by gating only the main latch in each stage of the pipeline that precedes a failed stage. This new method is applicable to widely used clocking elements, such as flip-flops and pulsed latches. Because it prevents inputs arriving at a stage, which is stalled, it can also be used in pipelines with multiple fan-in, fan-out, and looping. Simulations show an energy saving of 8%-12% with a target throughput of 0.9 instructions per cycle, and 15%-18% when the target is 0.8.</P>
Jeang-Lin Chang,Shih-Yu Lin,Kuan-Chao Chu,Min-Shin Chen 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.3
This paper proposes a new sliding mode control design with reduced control chattering. The proposednew design inherits the design concept from dynamic sliding mode control, in which the first-order time derivativeof the control input is treated as the control variable for a chattering control design. Previous dynamic sliding modedesigns require an extra uncertainty observer or uncertainty estimator to construct the sliding surface. This paper isable to waive such observer or estimator.
Oxidative stress and antioxidants in hepatic pathogenesis.
Ha, Hye-Lin,Shin, Hye-Jun,Feitelson, Mark A,Yu, Dae-Yeul WJG Press 2010 WORLD JOURNAL OF GASTROENTEROLOGY Vol.16 No.48
<P>Long term hepatitis B virus (HBV) infection is a major risk factor in pathogenesis of chronic liver diseases, including hepatocellular carcinoma (HCC). The HBV encoded proteins, hepatitis B virus X protein and preS, appear to contribute importantly to the pathogenesis of HCC. Both are associated with oxidative stress, which can damage cellular molecules like lipids, proteins, and DNA during chronic infection. Chronic alcohol use is another important factor that contributes to oxidative stress in the liver. Previous studies reported that treatment with antioxidants, such as curcumin, silymarin, green tea, and vitamins C and E, can protect DNA from damage and regulate liver pathogenesis-related cascades by reducing reactive oxygen species. This review summarizes some of the relationships between oxidative stress and liver pathogenesis, focusing upon HBV and alcohol, and suggests antioxidant therapeutic approaches.</P>
VOCs absorption in rotating packed beds equipped with blade packings
Chia-Chang Lin,Yu-Chiao Lin,Kuo-Shin Chien 한국공업화학회 2009 Journal of Industrial and Engineering Chemistry Vol.15 No.6
This work investigated the volatile organic compounds (VOCs) removal efficiency of the RPB equipped with blade packings using absorption. Methanol, methyl ethyl ketone and methyl acetate were used as the model VOCs herein. The VOCs removal efficiency (E) was observed to increase with the rotational speed and the liquid flow rate but decrease with the gas flow rate. Moreover, methanol absorption provided the largest E values owing to that the solubility of methanol in water was the highest among three VOCs, implying that the centrifugal force induced from the RPB equipped with blade packings did not affect the thermodynamic property of VCOs. In addition, when the gas flow rate was 50 L/min, the highest E values for methanol, methyl ethyl ketone and methyl acetate absorption were 89.8, 77.6, and 68.9, respectively. Consequently, the RPB equipped with blade packings would be more applicable to the removal of more soluble VOCs from gaseous streams of huge flow rate.
Human-Oriented Recognition for Intelligent Interactive Office Robot
Chia-Ming Wang,Shin-Huan Tseng,Pei-Wen Wu,Yuan-Han Xu,Chien-Ke Liao,Yu-Chi Lin,Yi-Shiu Chiang,Chung-Dial Lim,Ting-Sheng Chu,Li-Chen Fu 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
This paper presents our new intelligent interactive robot, which is constructed to eagerly provide multi-functional services in an office environment. In order to endow a full interactive capability of our robots for realizing so-called human-robot interaction (HRI), we propose sensor fusion based human detection and tracking system and human pose estimation to deal with a number of situations which may take place in the office environment. Not only by these perceptions, human interact with the robot also by some natural way, such as touching the interface screen and talking with the robot through microphone. Finally, the effectiveness of the proposed work is tested and validated by some of experiments.