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( Hongtao Liu ),( Seng Zhu ),( Yingying Sun ),( Na Li ),( Jingmin Gu ),( Changjiang Sun ),( Xin Feng ),( Wenyu Han ),( Jianxia Jiang ),( Liancheng Lei ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.1
Meningitis caused by Streptococcus suis serotype 2 (S. suis 2) is a great threat to the pig industry and human health. Virulence factors associated with the pathogenesis of meningitis have yet to be clearly defined, even though many potential S. suis 2 virulence factors have been identified. This greatly hinders the progress of S. suis 2 meningitis pathogenesis research. In this study, a co-culture blood-brain barrier (BBB) model was established using primary porcine brain microvascular endothelial cells and astrocytes, and the whole genome library of S. suis 2 was constructed using phage display technology. Finally, a total of 14 potential virulence factors contributing to S. suis 2 adherence to and invasion of the BBB were selected by analyzing the interactions between the phage library and the co-culture model. Twelve of these factors have not been previously reported in meningitis-related research. The data provide valuable insight into the pathogenesis of S. suis 2 meningitis and potential targets for the development of drug therapies.
Zhu, Shijin,Li, Li,Liu, Jiabin,Wang, Hongtao,Wang, Tian,Zhang, Yuxin,Zhang, Lili,Ruoff, Rodney S.,Dong, Fan American Chemical Society 2018 ACS NANO Vol.12 No.2
<P>Two-dimensional birnessite has attracted attention for electrochemical energy storage because of the presence of redox active Mn<SUP>4+</SUP>/Mn<SUP>3+</SUP> ions and spacious interlayer channels available for ions diffusion. However, current strategies are largely limited to enhancing the electrical conductivity of birnessite. One key limitation affecting the electrochemical properties of birnessite is the poor utilization of the MnO<SUB>6</SUB> unit. Here, we assemble β-MnO<SUB>2</SUB>/birnessite core–shell structure that exploits the exposed crystal face of β-MnO<SUB>2</SUB> as the core and ultrathin birnessite sheets that have the structure advantage to enhance the utilization efficiency of the Mn from the bulk. Our birnessite that has sheets parallel to each other is found to have unusual crystal structure with interlayer spacing, Mn(III)/Mn(IV) ratio and the content of the balancing cations differing from that of the common birnessite. The substrate directed growth mechanism is carefully investigated. The as-prepared core–shell nanostructures enhance the exposed surface area of birnessite and achieve high electrochemical performances (for example, 657 F g<SUP>–1</SUP> in 1 M Na<SUB>2</SUB>SO<SUB>4</SUB> electrolyte based on the weight of parallel birnessite) and excellent rate capability over a potential window of up to 1.2 V. This strategy opens avenues for fundamental studies of birnessite and its properties and suggests the possibility of its use in energy storage and other applications. The potential window of an asymmetric supercapacitor that was assembled with this material can be enlarged to 2.2 V (in aqueous electrolyte) with a good cycling ability.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2018/ancac3.2018.12.issue-2/acsnano.7b03431/production/images/medium/nn-2017-03431b_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn7b03431'>ACS Electronic Supporting Info</A></P>
Wang, Hongtao,Li, Guisheng,Kwon, Woo-Saeng,Yang, Deok-Chun,Zhu, Jianhua MDPI 2016 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.17 No.6
<P><I>Panax ginseng</I> is one of the most valuable medicinal plants in the Orient. The low level of genetic variation has limited the application of molecular markers for cultivar authentication and marker-assisted selection in cultivated ginseng. To exploit DNA polymorphism within ginseng cultivars, ginseng expressed sequence tags (ESTs) were searched against the potential intron polymorphism (PIP) database to predict the positions of introns. Intron-flanking primers were then designed in conserved exon regions and used to amplify across the more variable introns. Sequencing results showed that single nucleotide polymorphisms (SNPs), as well as indels, were detected in four EST-derived introns, and SNP markers specific to “Gopoong” and “K-1” were first reported in this study. Based on cultivar-specific SNP sites, allele-specific polymerase chain reaction (PCR) was conducted and proved to be effective for the authentication of ginseng cultivars. Additionally, the combination of a simple NaOH-Tris DNA isolation method and real-time allele-specific PCR assay enabled the high throughput selection of cultivars from ginseng fields. The established real-time allele-specific PCR assay should be applied to molecular authentication and marker assisted selection of <I>P. ginseng</I> cultivars, and the EST intron-targeting strategy will provide a potential approach for marker development in species without whole genomic DNA sequence information.</P>
Sheng Hongtao,Zhu Qianlong,Tao Jun,Zhang Huaying,Peng Feixiang 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1
Based on the analysis of the interaction mechanism between the photovoltaic grid-connected inverter and the background harmonic of the distribution network, an optimal planning strategy for changing the equivalent impedance of the common connection point from the grid side of the inverter to suppress the harmonic amplifcation of the grid-side harmonic voltage near the resonant frequency point is proposed. The optimization strategy is based on the static distribution network reconfguration and photovoltaic confguration as the main means to optimize the equivalent impedance of the photovoltaic gridconnected point. At the same time, the active network loss and voltage deviation of the distribution network are optimized, and the mean value of harmonic voltage distortion rate, network loss and voltage deviation of harmonic monitoring points are taken as the objective function. At the same time, the harmonic monitoring points are optimized by the Pearson correlation coefcient, and the harmonic level of the whole distribution system is refected by the harmonic monitoring points. Taking IEEE-33 and IEEE-69 bus distribution systems as examples for comparative analysis, the NSGAII algorithm is used to solve the problem. The results show that the joint optimization of distribution network reconfguration and photovoltaic confguration can efectively suppress the interaction between photovoltaic injection harmonics and background harmonics of the distribution network. It efectively reduces the active power loss of the whole distribution network and the voltage deviation of the distribution network bus, and improves the minimum voltage of the distribution network. The efectiveness of the proposed PV optimal confguration strategy is verifed by comparing the examples of diferent distribution systems.
Huang, Chuanzhen,Zhu, Hongtao,Lu, Xinyu,Li, Quanlai,Che, Cuilian Korean Society for Precision Engineering 2008 International Journal of Precision Engineering and Vol.9 No.2
Critical erosion kinetic energy models for radial/median cracks and lateral cracks in a workpiece are established in this study. We used experimental results to demonstrate that the fracture erosion resistance and erosion machining number could be used to evaluate the brittle fracture resistance and machinability of a workpiece. Erosion kinetic energy models were developed to predict brittle fracture and ductile shear, and a critical erosion kinetic energy model was developed to predict the transition from brittle fracture to ductile shear. These models were verified experimentally.
Chuanzhen Huang,Hongtao Zhu,Xinyu Lu,Quanlai Li,Cuilian Che 한국정밀공학회 2008 International Journal of Precision Engineering and Vol.9 No.2
Critical erosion kinetic energy models for radial/median cracks and lateral cracks in a workpiece are established in this study. We used experimental results to demonstrate that the fracture erosion resistance and erosion machining number could be used to evaluate the brittle fracture resistance and machinability of a workpiece. Erosion kinetic energy models were developed to predict brittle fracture and ductile shear, and a critical erosion kinetic energy model was developed to predict the transition from brittle fracture to ductile shear. These models were verified experimentally.
Experimental Study on Sedimentation and Consolidation of Soil Particles in Dredged Slurry
Nan Zhang,Wei Zhu,Hongtao He,Yiyan Lv 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.7
Sedimentation and consolidation of dredged slurry is very complex in practice. A new Multilayer Extraction Sampling (MES) method was developed in this study to better understand the underlying law of sedimentation and consolidation of soil particles in slurries. Comparing with previous methods, the advantages of this method include: (1) the equipment is easy to operate and the test procedures are simple; (2) the volume distribution and the settling velocity of soil particles can be measured and calculated by Volume Flux Function (VFF) approach at different time and heights during sedimentation and consolidation process; (3) soil formation from sedimentation of dredged slurry can be also further studied based on pore water pressure measurements in conjunction with the velocity and density distributions. The experimental results revealed that there were four different zones during sedimentation and consolidation process: water zone, hindered settling zone, consolidation zone and a new zone termed as “transition zone” where soil particles are in contact with each other but effective stress are not fully developed. It is concluded that the sedimentation and consolidation of soil particles in dredged slurry was studied successfully in a holistic manner using this new experimental method.