Part two: Library Research : Effects of Endocrine Hormone and Immune System after Exposure to Mixed Cypermethrin and Methylparathion

( Ping Liu ),( Wei Hua Wen ),( Wei Hong Yuan ),( Xiao Xiao Song ),( Xi Nan Wu ) 한국환경보건학회(구-한국환경위생학회) 2004 Current Challenges and Advances in Environmental H Vol.- No.-

Development of a Small Tea Plucking Machine

( Ping-lang Yen ),( Nai-wen Chang ),( Chen-ya Chen ),( Hong-xuan Wei ),( Shih-fangchen ),( Wei-yang Hwang ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

Tea plucking in Taiwan suffers of serious labor shortage due to agricultural population decreasing and aging. The problems become even worse in hot season of tea plucking and cause tremendous economic loses for farmers. Current solutions of introducing tea harvesting machinery to substitute human power were not adequately suitable to Taiwan's geographical specialty. These machines were found difficult to operate efficiently in mountain areas, or in small tea farms, and farms with narrow ridge to ridge. This paper has proposed a tea plucking prototype that is specially designed to operate in mountain areas and for small scale tea farm. The machine contains a carrier, a tea cutter and a motorized mechanism. The carrier of small size was able to be moved by human and its tea plucking module is motorized. At the same time the height of cutter was automatically adjusted by the controller so that tea leaves can be evenly trimmed during the carrier movement. The prototype successfully demonstrated the efficiency of tea plucking can be increased and workload for human could be significantly reduced. In conclusion, the developed small electrical tea plucking machine was proved feasible for the release of labor shortage problem in Taiwan’s tea plucking industry.

Physiological Response of Young Seedlings from Five Accessions of Diospyros L. under Salinity Stress

Wei, Ping,Yang, Yong,Fang, Ming,Wang, Fei,Chen, Hejie Korean Society of Horticultural Science 2016 원예과학기술지 Vol.34 No.4

Salinity stress limits plant cultivation in many areas worldwide; however, persimmon (Diospyros spp.) has high tolerance to salt. Five accessions of Diospyros [three of Diospyros lotus (accession numbers 824, 846, and 847); one of Diospyros kaki var. sylvestris (869); and one of Diospyros virginiana (844)] were chosen for analysis of salinity stress. We compared the effects of salt stress on plant growth, relative water content (RWC), malondialdehyde (MDA), electrolyte leakage (EL), hydrogen peroxide content ($H_2O_2$), and antioxidative enzyme activities (superoxide dismutase, SOD; catalase, CAT; peroxidase, POD; and ascorbate peroxidase, APX) in leaves of healthy potted seedlings from each of the five accessions after salt treatment for 25 days. Salt stress affected the growth of plants in all five accessions, with all three D. lotus accessions showing the most severe effect. Salt stress increased membrane lipid peroxidation in all accessions, but a stronger increase was observed in the three D. lotus accessions. Moreover, accumulation of $H_2O_2$ was faster in salt-sensitive D. lotus compared to salt-tolerant D. virginiana 844. The activities of all antioxidant enzymes increased in D. virginiana 844 and in D. kaki var. sylvestris 869; the activities of SOD, CAT, and APX were at similar levels in D. virginiana 844 and D. kaki var. sylvestris 869, but POD activity was stimulated to a greater extent in D. virginiana 844. The activities of all antioxidant enzymes (except POD) decreased in D. lotus 824 and increased (except for SOD) in D.lotus 846. The activities of SOD and APX decreased in D. lotus 847, whereas POD and CAT activities both increased. Relative water content decreased significantly in D. lotus. No significant changes in lipid peroxidation or relevant antioxidant parameters were detected in any of the accessions in controls treated with 0.0% NaCl. D. virginiana 844 had higher antioxidant capacity in response to salinity compared to other persimmon rootstocks. These results indicate that changes of these key physiological variables are related to salinity resistance in different accessions of persimmon.

Asymmetric Reduction of Ethyl Acetoacetate Catalyzed by Immobilized Acetobacter sp. CCTCC M209061 Cells in Hydrophilic Ionic Liquid Hybrid System

Ping Wei,Pei Xu,Xiao-Ting Wang,Wen-Yong Lou,Min-Hua Zong 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.2

The asymmetric reduction of ethyl acetoacetate (EAA) to ethyl (R)-3-hydroxybutyrate [(R)-EHB] using immobilized Acetobacter sp. CCTCC M209061 cells was successfully conducted in a hydrophilic ionic liquid (IL)- containing system. The best one of all the tested watermiscible ILs was 1-(hydroxyethyl)-3-methylimidazolium hydrochloride (C2OHMIM·Cl). In C2OHMIM·Cl-aqueous buffer hybrid system, it was found that the optimal IL concentration, substrate and co-substrate concentration, reaction temperature, buffer pH and shaking rate were 0.5mol/L, 45 mmol/L, 80 mmol/L, 35oC, pH 5.5 and 200 rpm, respectively. Under the optimized reaction conditions, the initial reaction rate, the yield and the product e.e. reached 4.90 μmol/min, 95.3 and > 99.0%, respectively, which were much higher than the corresponding values reported previously. The efficient biocatalytic process mediated by the immobilized cells was feasible on 500 mL preparative scale, and the biocatalysts showed good operational stability and could be recycled for at least 10 batches.

Surface-functionalized Hexagonal Mesoporous Silica Supported 5-(4-Carboxyphenyl)-10,15,20-triphenyl Porphyrin Manganese(III) Chloride and Their Catalytic Activity

Wei-jie Zhang,Pingping Jiang,Ping-bo Zhang,Jia-wei Zheng,Haiyang Li 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.12

Manganese(III) 5-(4-carboxyphenyl)-10,15,20-triphenyl porphyrin chloride (Mn(TCPP)Cl) was grafted through amide bond on silica zeolite Y (HY), zeolite beta (Hβ) and hexagonal mesoporous silica (HMS). XRD, ICP-AES, N2 physisorption, SEM, TEM, FTIR and thermal analysis were employed to analyse these novel heterogeneous materials. These silica supported catalysts were shown to be used for epoxidation and good shape selectivity was observed. The effect of support structure on catalytic performance was also discussed. The catalytic activity remained when the catalysts were recycled five times. The energy changes about epoxidation of alkenes by NaIO4 and H2O2 were also computationally calculated to explain the different catalytic efficiency.

Effects of Endocrine Hormone and Immune System after Exposure to Mixed Cypermethrin and Methylparathion

Ping LIU,Wei-hua WEN,Wei-hong YUAN,Xiao-xiao SONG,Xinan WU 한국환경보건학회 2004 한국환경보건학회 학술대회 자료집 Vol.2004 No.-

Three-dimensional Spatiotemporal Accessible Solitons in a PT-symmetric Potential

Wei-Ping Zhong,Milivoj R. Belić,Tingwen Huang 한국광학회 2012 Current Optics and Photonics Vol.16 No.4

Utilizing the three-dimensional Snyder–Mitchell model with a PT-symmetric potential, we study the influence of PT symmetry on beam propagation in strongly nonlocal nonlinear media. The complex Coulomb potential is used as the PT-symmetric potential. A localized spatiotemporal accessible soliton solution of the model is obtained. Specific values of the modulation depth for different soliton parameters are discussed. Our results reveal that in these media the localized solitons can exist in various shapes,such as single-layer and multi-layer disk-shaped structures, as well as vortex-ring and necklace patterns.

Structural instantaneous frequency extraction based on improved multi-synchrosqueezing generalized S-transform

Ping-Ping Yuan,Xue-Li Cheng,Hang-Hang Wang,Jian Zhang,Zhong-Xiang Shen,Wei-Xin Ren 국제구조공학회 2021 Smart Structures and Systems, An International Jou Vol.28 No.5

A new method is proposed to improve the accuracy of structural instantaneous frequency (IF) extraction. The proposed method combines a new form of improved generalized S-transform (IGST) and a multi-synchrosqueezing operation. The parameters selection of the window function in IGST is derived through the concentration measure (CM) principle. Then, the multi-synchrosqueezing algorithm is employed to improve energy aggregation of time-frequency analysis (TFA). To verify the effectiveness and accuracy of the proposed improved multi-synchrosqueezing generalized S-transform (IMSSGST), a frequency-modulated multi-component signal is investigated. For structural IF extraction, a two-story shear frame and a threestory steel frame structure are introduced. Furthermore, the IF identification of a seven-story RC shear wall structure is conducted to verified the practicability in actual engineering. Numerical simulation and experimental results show that the proposed method can effectively improve the energy aggregation of TFA and effectively improve the accuracy of IF identification.

Spatial Path Following Control of an Autonomous Underactuated Airship

Wei-Xiang Zhou,Chang Xiao,Ping-Fang Zhou,Deng-Ping Duan 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.7

This paper studies the spatial path following control of an autonomous underactuated airship in the presence of model uncertainties and external disturbances. Firstly, the nonlinear dynamics model, kinematics modeland path following error dynamics model are given. And the control objective is formulated. Then, an adaptivebackstepping sliding mode controller is designed. Besides, to overcome the disadvantage of dependence on theaccurate vehicle model, a nonlinear disturbance observer (NDOB) is adopted to estimate the attack and sideslip angular velocities. In addition, when backstepping technique is uesd, the complex analytic computation of commandderivative is required to be known. To handle this problem, a sliding mode differentiator is implemented to generatethe command derivatives. Finally, the closed loop stability for the system is proved using Lyapunov stability theory. Numerical simulations are given to demonstrate the effectiveness of the proposed method.

Effects of Drought Stress on the Antioxidant Systems in Three Species of Diospyros L.

Ping Wei,Yong Yang,Fei Wang,Hejie Chen 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.5

Drought stress is a limiting factor for plant cultivation in many areas of China and persimmon has good capacity to withstand water shortage. Three species of Diospyros (three accession of Diospyros lotus, referred to as accession No. 824, 846, and 847; one accession of Diospyros kaki var. sylvestris referred to as 869; and one accession of Diospyros virginiana referred to as 844) were chosen for drought stress analysis. We withheld water from healthy two-year-old potted seedlings for 20 days, and compared the effects of water stress on malondialdehyde (MDA), superoxide free radical (O2.-), hydrogen peroxide (H2O2), antioxidative enzyme, glutathione (GSH), and ascorbic acid (AsA) levels in the leaves of the three species. In the treatment group, water stress increased the membrane lipid peroxidation in the three species, but a more significant increase was observed in the D. kaki var. sylvestris 869 than in the D. virginiana 844. Moreover, accumulation of O2.- and H2O2 was faster in weakly drought-resistant hybrids than in the highly drought- resistant hybrids. Though the activities of antioxidant enzymes and antioxidant contents were increased in the three species under drought stress, the activities of superoxide dismutase, catalase, peroxidase and ascorbate peroxidase were stimulated to a greater extent in D. virginiana 844 than in D. lotus and D. kaki var. sylvestris 869. In addition, the GSH, AsA, and relative water contents were increased significantly in D. virginiana 844, but not in D. kaki var. sylvestris 869. In the control group, no significant changes in lipid peroxidation and relevant antioxidant parameters were detected among the three species. These results indicated that changes of MDA, O2.-, and H2O2 content, antioxidative enzyme activities, and GSH and AsA concentrations were correlated to drought resistance in the different species. D. virginiana 844 had a higher antioxidation capacity in response to drought than the other two species.