Henan Normal University

About: Henan Normal University is a education organization based out in Xinxiang, China. It is known for research contribution in the topics: Catalysis & Ionic liquid. The organization has 10863 authors who have published 11077 publications receiving 166773 citations.

Oral exposure to Microcystis increases activity-augmented antioxidant enzymes in the liver of loach (Misgurnus mizolepis) and has no effect on lipid peroxidation.

Abstract: Recently, eutrophication has induced severe cyanobacterial blooms in the Naktong River, the second largest river of Korea. In the present study, lipid peroxidation and the antioxidant enzymes superoxide dismutase, catalase, and glutathione peroxidase, were evaluated in the liver of loach ( Misgurnus mizolepis ) that were orally exposed to a low dose of Microcystis through dietary supplementation with bloom scum. Loach received 75 mg of dry cells/kg body weight mass (equal to 10 μg microcystin-RR/kg body mass), for 28 days under controlled conditions. Antioxidant enzymatic activity and lipid peroxidation were measured after termination of exposure. The activities of antioxidant enzyme were significantly increased in the livers of toxin-exposed loach after 28 days of exposure, as compared to control fish. However, lipid peroxidation remained stable in both groups. These results suggest that antioxidant enzymes were able to eliminate oxidative stress induced by low concentrations of microcystins and to prevent increased lipid peroxidation in the liver of loach.

Demagnetization Weakening and Magnetic Field Concentration With Ferrite Core Characterization for Efficient Wireless Power Transfer

Abstract: To improve the power transfer efficiency in wireless power transfer systems, a novel configuration of a magnetic resonant structure is proposed in this paper. According to the analytical expression of mutual inductance, the magnetic field can be improved by weakening the demagnetizing factor for coils with a ferrite core. In this paper, the demagnetizing factors of a cylindrical ferrite core and a novel ferrite core are investigated. Compared with the cylindrical ferrite core, the proposed ferrite core has a smaller demagnetizing factor and an increased mutual inductance. In addition, the magnetic field through the receiving coil is enhanced due to the thin ferrite axis where the magnetic field is concentrated. The proposed ferrite core is designed and analyzed. Moreover, the effects of pitch and lateral misalignment, as well as the number of turns of the receiving coil, the core loss, and the load, are studied. Experimental prototypes are established to validate the performance of the wireless power transfer system with different types of receiving structures. The results indicate that the proposed structure is superior to others and that it shows better performance in power transfer efficiency and transfer distance, which is in good agreement with the theoretical and simulation analysis.