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Ciying Xiao,Shaorong Luan,Zhikang Xu,Jialin Lang,Wenbing Rao,Qingchun Huang 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4
The Asiatic rice borer, Chilo suppressalis Walker, is one of the most destructive rice pests in the world; its physiological adaptability to the sustained application of fipronil was investigated. After topical application, fipronil showed strong lethal effect with LD20 and LD80 values on the fourth instar larvae as 0.00159 and 0.00906 μg per larvae at 48 h- post treatment, and also revealed slight inhibition on the eclosion of pupae and the hatching of eggs. LD20 dosage of fipronil significantly enhanced the activities of carboxylesterase (CarE), glutathione-Stransferase (GST) and cytochrome P450-linked p-nitro O-demethylase (PNOD) in the borers. LD80 dosage of fipronil showed a mild decrease on the activity of CarE, GST and PNOD, and a slight suppression on the activity of glutamate dehydrogenase (GDH), but strongly induced the transform of glutamate to gamma-aminobutyric acid (GABA) and the activity of glutamate decarboxylase (GAD), thereby improved GABA level in the bores. Results suggested that the borer possessed positive tolerance potential to firponil via the modulation of detoxification and GABA responses and provided the basis for further studies on reducing the tolerance of the borer in the control strategies.
Xu Xu,Jinhong Yu,Zihai He,Shaorong Lu,Dong Guo 한국고분자학회 2014 Macromolecular Research Vol.22 No.10
A reactive compatibilizer containing flexible segment (RCFS) was synthesized and characterized by Fouriertransform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The RCFS was used as acompatibilizer for the preparation of lignin/polypropylene (PP) wood plastic composites, and the effect of the RCFSon the properties of composites (e.g., mechanical properties, thermal properties, crystal structure, and morphology)were investigated in detail. Experimental results indicated that the lignin/PP composite displayed the best performancewith the addition of 2 wt% RCFS. Its impact strength, flexural strength, and modulus were 56.8%, 37.3%,and 20.6%, respectively, which are higher than those of the untreated composites. Moreover, RCFS treatment couldalso increase the thermal stability, crystallization rate, and degree of crystallinity of lignin/PP composites.
Wang Lianhua,Shi Qiyang,Chen Shaorong 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.2
Background Progestin resistance remains a major issue that is urgently needed to solve in progestin therapy for patients with endometrial carcinoma (EC). Increasing research indicated the critical role of FoxM1 in drug resistance of diverse cancers. Objective This study aims to explore whether FoxM1 contributes to medroxyprogesterone acetate (MPA, a commonly used progestin) resistance in EC. Results It was observed that FoxM1 is highly expressed in MPA-resistant ECC-1 (ECC-1/MPA) cells at both protein and mRNA levels when compared with ECC-1 cells. Knocking down FoxM1 in ECC-1/MPA cells signifi cantly decreased the IC50 value of MPA, and rendered ECC-1/MPA cells more sensitive to MPA treatment. In vivo assay exhibited a similar tendency. Simultaneously, FoxM1 knockdown also suppressed proliferation, migration, and invasion of ECC-1/MPA cells. Furthermore, FoxM1 knockdown also suppressed epithelial-to-mesenchymal transition (EMT), as revealed by an elevation in E-cadherin expression and a decrease in N-cadherin and Vimentin expressions in ECC-1/MPA cells. Conclusion These fi ndings indicated the role of FoxM1 in the MPA resistance of EC. Down-regulated FoxM1 expression might be a potential strategy for overcoming MPA resistance.
Influences of Wire Diameters on Output Power in Electromagnetic Energy Harvester
Yan Peng,Lan Zhang,Zhongjie Li,Songyi Zhong,Yong Liu,Shaorong Xie,Jun Luo 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.10 No.1
In this paper, we systematically investigate how the wire diameter affects the output performance of electromagnetic energy harvesters. The harvesters with the same structure but different coils mainly comprised of a magnet array, two coil arrays, a pair of springs and a housing. Different discrete wire diameters of coils are selected to compare the output performance and explore the optimal value. We first set up the theoretical model of the configuration to predict optimal wire diameter and conduct simulations to observe open-circuit voltage and output power, and find the hypothetically optimal diameter leading to the best performance. Subsequently, we fabricate a series of prototypes and conduct four groups of experiments from the following aspects for comparison purposes: constant frequency excitation, frequency sweep, impedance matching and charging capacitors, and validate the theoretically estimated value. When we operate the prototypes under the excitation of 20 Hz, 1.0 g, the maximum average power of 37.45 mW is generated with the best wire diameter, at least 1.62 times as high as that in other cases. The results of capacitor charging experiments, i.e., charging rate, further validate the output power trend. This study can be of great significance for power density improvement in electromagnetic energy harvesters.
Damping of Inter-Area Low Frequency Oscillation Using an Adaptive Wide-Area Damping Controller
Yao, Wei,Jiang, L.,Fang, Jiakun,Wen, Jinyu,Wang, Shaorong The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.1
This paper presents an adaptive wide-area damping controller (WADC) based on generalized predictive control (GPC) and model identification for damping the inter-area low frequency oscillations in large-scale inter-connected power system. A recursive least-squares algorithm (RLSA) with a varying forgetting factor is applied to identify online the reduced-order linearlized model which contains dominant inter-area low frequency oscillations. Based on this linearlized model, the generalized predictive control scheme considering control output constraints is employed to obtain the optimal control signal in each sampling interval. Case studies are undertaken on a two-area four-machine power system and the New England 10-machine 39-bus power system, respectively. Simulation results show that the proposed adaptive WADC not only can damp the inter-area oscillations effectively under a wide range of operation conditions and different disturbances, but also has better robustness against to the time delay existing in the remote signals. The comparison studies with the conventional lead-lag WADC are also provided.
Wei Yao,Jiakun Fang,Ping Zhao,Shilin Liu,Jinyu Wen,Shaorong Wang 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.2
In this paper, a nonlinear adaptive damping controller based on radial basis function neural network (RBFNN), which can infinitely approximate to nonlinear system, is proposed for thyristor controlled series capacitor (TCSC). The proposed TCSC adaptive damping controller can not only have the characteristics of the conventional PID, but adjust the parameters of PID controller online using identified Jacobian information from RBFNN. Hence, it has strong adaptability to the variation of the system operating condition. The effectiveness of the proposed controller is tested on a two-machine five-bus power system and a four-machine two-area power system under different operating conditions in comparison with the lead-lag damping controller tuned by evolutionary algorithm (EA). Simulation results show that the proposed damping controller achieves good robust performance for damping the low frequency oscillations under different operating conditions and is superior to the lead-lag damping controller tuned by EA.