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A Hybrid Self-Powered System Based on Wind Energy Harvesting for Low-Power Sensors on Canyon Bridges
Hao Cao,Xiaoping Wu,Hao Wu,Yajia Pan,Dabing Luo,Ali Azam,Zutao Zhang 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.10 No.1
Canyon cross wind has great potential to be transformed into electricity to power for low-power sensors of the health monitoring devices in bridge field. In this paper, a hybrid wind energy harvesting system (WEHS), integrating piezoelectric and electromagnetic mechanisms, is proposed to supply power for low-power sensors on canyon bridges. Firstly, the S-rotor embedded with a one-way bearing converts wind energy into rotational mechanical energy. Then, the piezoelectric cantilever beam and coils simultaneously convert mechanical energy into electricity under the excitation of the rotational magnet array. For the piezoelectric transducer, the symmetrical poles arrangement of tip magnet reduces the starting wind speed and resistance torque during energy harvesting. In addition, the relationship between different number of excitation magnets and the output of the piezoelectric transducer is explored. Finally, the output electricity is stored in the capacitors to supply power for low power sensors. The experimental results showed that the symmetrical poles arrangement of tip magnet could effectively reduce the starting resistance torque and improve the output power at low wind speeds. Given a wind speed of 6.5 m/s, the maximum output power of the WEHS can reach 19.24 mW with corresponding electrical energy of 75.714 mJ in one sweep period (6 s). The field test results demonstrated that the WEHS could effectively charge for the capacitors and power for a hundred LEDs. Furthermore, the mechanical durability and stability of the WEHS are verified by introducing a self-powered low power sensor system.
Yunjiao LI,Xiaoping Huang,Kaihua Huang,Shuai Wang,Zhanfang Cao,Hong Zhong 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
In this paper, a novel b-Oxo thioamide surfactant 3-(ethylamino)-N-phenyl-3-thioxopropanamide(EAPhTXPA) was synthesized andfirst used asflotation collector for galena and sphalerite. The results ofmicro-flotation tests showed that EAPhTXPA possessed not only stronger collecting ability but also betterselectivity to galena against sphalerite than traditional sulfide collector sodium isobutyl xanthate (SIBX). Adsorption tests indicated that EAPhTXPA could adsorb onto galena surfaces more easily than SIBX, whilethe adsorption affinity of EAPhTXPA to sphalerite was weaker than that of SIBX. The results of FTIR andXPS spectra demonstrated that there was no chemical bond or new chemical state appeared on sphaleritesurfaces after treatment by EAPhTXPA, while Pb-EAPhTXPA complexes were formed on galena surfacesby reaction of EAPhTXPA’sC(¼S) ,C(¼O)andNHgroups with surface Pb atoms to buildPb S, Pb O and Pb N bonds. DFT calculations further gave an evidence that the dominated interactionbetween sphalerite and EAPhTXPA was probably van der Walls forces, and EAPhTXPA reacted with galenaby the formation of Pb S, Pb O and Pb N bonds.
( Qingfeng Xie ),( Zhuo Cao ),( Weiling You ),( Xiaoping Cai ),( Mei Shen ),( Zhangyong Yin ),( Yiwei Jiang ),( Xin Wang ),( Siyu Ye ) 한국미생물생명공학회 2024 Journal of microbiology and biotechnology Vol.34 No.2
New anti-lung cancer therapies are urgently required to improve clinical outcomes. Since ganodermanontriol (GDNT) has been identified as a potential antineoplastic agent, its role in lung adenocarcinoma (LUAD) is investigated in this study. Concretely, lung cancer cells were treated with GDNT and/or mycophenolate mofetil (MMF), after which MTT assay, flow cytometry and Western blot were conducted. Following bioinformatics analysis, carboxylesterase 2 (CES2) was knocked down and rescue assays were carried out in vitro. Xenograft experiment was performed on mice, followed by drug administration, measurement of tumor growth and determination of CES2, IMPDH1 and IMPDH2 expressions. As a result, the viability of lung cancer cells was reduced by GDNT or MMF. GDNT enhanced the effects of MMF on suppressing viability, promoting apoptosis and inducing cell cycle arrest in lung cancer cells. GDNT up-regulated CES2 level, and strengthened the effects of MMF on down-regulating IMPDH1 and IMPDH2 levels in the cells. IMPDH1 and IMPDH2 were highly expressed in LUAD samples. CES2 was a potential target for GDNT. CES2 knockdown reversed the synergistic effect of GDNT and MMF against lung cancer in vitro. GDNT potentiated the role of MMF in inhibiting tumor growth and expressions of CES2 and IMPDH1/2 in lung cancer in vivo. Collectively, GDNT suppresses the progression of LUAD by activating CES2 to enhance the metabolism of MMF.
( Keji Quan ),( Zhuang Zhu ),( Sanjie Cao ),( Fei Zhang ),( Chang Miao ),( Xintian Wen ),( Xiaobo Huang ),( Yiping Wen ),( Rui Wu ),( Qigui Yan ),( Yong Huang ),( Xiaoping Ma ),( Xinfeng Han ),( Qin Z 한국미생물 · 생명공학회 2018 Journal of microbiology and biotechnology Vol.28 No.12
In our previous studies, we have identified several in vivo-induced antigens and evaluated their potential as subunit vaccine candidates in a murine model, in which the recombinant protein GalT showed the most potent immunogenicity and immunoprotective efficacy against Actinobacillus pleuropneumoniae. To exploit a more efficient way of delivering GalT proteins, in this study, we employed the widely studied E. coli outer membrane vesicles (OMVs) as a platform to deliver GalT protein and performed the vaccine trial using the recombinant GalTOMVs in the murine model. Results revealed that GalT-OMVs could elicit a highly-specific, IgG antibody titer that was comparable with the adjuvant GalT group. Significantly higher lymphocyte proliferation and cytokines secretion levels were observed in the GalT-OMVs group. 87.5% and 50% of mice were protected from a lethal dose challenge using A. pleuropneumoniae in active or passive immunization, respectively. Histopathologic and immunohistochemical analyses showed remarkably reduced pathological changes and infiltration of neutrophils in the lungs of mice immunized with GalT-OMVs after the challenge. Taken together, these findings confirm that OMVs can be used as a platform to deliver GalT protein and enhance its immunogenicity to induce both humoral and cellular immune responses in mice.
Chunxia Chai,Qiao Wang,Sanjie Cao,Qin Zhao,Yiping Wen,Xiaobo Huang,Xintian Wen,Qiguai Yan,Xiaoping Ma,Rui Wu 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.1
Japanese encephalitis virus (JEV) is a mosquito-borne, zoonotic flavivirus causing viral encephalitis in humans and reproductive disorder in swine. JEV is prevalent throughout China in human; however, spatiotemporal analysis of JEV in Chinese swine herds has not been reported previously. Herein, we present serological and molecular epidemiological results and estimates of prevalence of JEV infections among swine herds in various regions of China. The results suggest that JEV infections are widespread and genotype I and III strains co-exist in the same regions. Therefore, there is an urgent need to monitor JEV infection status among swine herds in China.