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30 results on '"Chen, Ze-Min"'

1. Ideal Nodal Rings of One-Dimensional Photonic Crystals in the Visible Region

Author

Deng, Wei-Min, Chen, Ze-Min, Li, Meng-Yu, Guo, Chao-Heng, Chen, Xiao-Dong, Chen, Wen-Jie, and Dong, Jian-Wen

Subjects
Physics - Optics, Physics - Applied Physics
Abstract

Three-dimensional (3D) artificial metacrystals host rich topological phases, such as Weyl points, nodal rings and 3D photonic topological insulators. These topological states enable a wide range of applications, including 3D robust waveguide, one-way fiber and negative refraction of surface wave. However, these carefully designed metacrystals are usually very complex, hindering their extension to nanoscale photonic systems. Here, we theoretically proposed and experimentally realized an ideal nodal ring in visible region using a simple 1D photonic crystal. The pi Berry phase around the ring is manifested by a 2pi reflection phase's winding and the resultant drumhead surface states. By breaking the inversion symmetry, the nodal ring can be gapped and the pi-Berry phase would diffuse into a toroidal shaped Berry flux, resulting in photonic ridge states (the 3D extension of quantum valley Hall states). Our results provide a simple and feasible platform for exploring 3D topological physics and their potential applications in nanophotonics., Comment: 15 pages, 5 figures

Published
2021

6. Faecal microbiome and metabolic signatures in rectal neuroendocrine tumors

Author

Hu, Wei, primary, Chen, Ze Min, additional, Li, Xia Xi, additional, Lu, Lan, additional, Yang, Gen Hua, additional, Lei, Zheng Xia, additional, You, Li Juan, additional, Cui, Xiao Bing, additional, Lu, Si Cun, additional, Zhai, Zhi Yong, additional, Zeng, Zhi Yu, additional, Chen, Ye, additional, Huang, Si Lin, additional, and Gong, Wei, additional

Published
2022
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26. A 7mW-to-183mW Dynamic Quality-Scalable H.264 Video Encoder Chip

Author

Chang, Hsiu-Cheng, primary, Chen, Jia-Wei, additional, Su, Ching-Lung, additional, Yang, Yao-Chang, additional, Li, Yao, additional, Chang, Chun-Hao, additional, Chen, Ze-Min, additional, Yang, Wei-Sen, additional, Lin, Chien-Chang, additional, Chen, Ching-Wen, additional, Wang, Jinn-Shan, additional, and Guo, Jiun-In, additional

Published
2007
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27. The Study of Phosphate Film on Steel Surface with the Assistance of Cu[SC(NH2)2]32+ and Carboxyl Copolymer

Author

Chen, Ze Min, Lu, Pin, and Jia, Yan

Abstract

In our studied phosphating system we used the urea complex of copper (Cu[SC(NH2)2]32+) as the film promoter to instead of the nitrite and nitrate in traditional steel phosphating solution. We determined the changes of each component phosphate solution during specimen handling, and preliminary explorated the formation mechanism. Results showed that: compared to conventional zinc phosphating process the solution was stability, all the ferrous iron was formed the film, and FePO4 had not precipitated in the phosphating system; the phase of the phosphate film was formed by the small grain which was Fe2Zn(PO4)2•4H2O and Zn3(PO4)2•4H2O mixed in the proportional spherical crystals to instead of the Zn3(PO4)2•4H2O-based that was needle-like or leaf-shaped loose crystals.

Published
2012
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28. Structures, Stabilites and Electronic Properties of Phenyl Silsesquioxanes Si2nO3nPh2n (n=1-5): A DFT Study

Author

Yu, Shu Yuan, Chen, Ze Min, Zhang, Cheng Gen, and Ma, Yu Fang

Abstract

Density functional theory (DFT) calculations are performed to investigate the structures of phenyl silsesquioxanes Si2nO3nPh2n (n=1-5). Our study focuses on the structures, stabilities, and electronic properties of the phenyl silsesquioxanes. The large HOMO–LUMO gaps, which range from 5.14 to 6.30 eV, imply optimal electronic structures for these molecules. The energy differences between the possible conformers of same size phenyl silsesquioxanes are small.

Published
2012
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29. Low-frequency anomaly inOs172moment of inertia

Author

Wells, J. C., primary, Johnson, N. R., additional, Baktash, C., additional, Lee, I. Y., additional, McGowan, F. K., additional, Rao, M. N., additional, Riedinger, L. L., additional, Janzen, V., additional, Ma, W. C., additional, Wen, Shuxian, additional, Chen, Ze-Min, additional, Semmes, P. B., additional, Leander, G. A., additional, and Chen, Y. S., additional

Published
1987
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30. Dual RNA sequencing of Helicobacter pylori and host cell transcriptomes reveals ontologically distinct host-pathogen interaction.

Author

Hu W, Zhai ZY, Huang ZY, Chen ZM, Zhou P, Li XX, Yang GH, Bao CJ, You LJ, Cui XB, Xia GL, Ou Yang MP, Zhang L, Wu WKK, Li LF, Zhang YX, Xiao ZG, and Gong W

Subjects
Animals, Humans, Mice, Bacterial Proteins genetics, Antigens, Bacterial genetics, Transcriptome genetics, RNA Precursors metabolism, Host-Pathogen Interactions genetics, Sequence Analysis, RNA, RNA, Messenger metabolism, Cytotoxins metabolism, Helicobacter pylori genetics, Colitis
Abstract

Helicobacter pylori is a highly successful pathogen that poses a substantial threat to human health. However, the dynamic interaction between H. pylori and the human gastric epithelium has not been fully investigated. In this study, using dual RNA sequencing technology, we characterized a cytotoxin-associated gene A ( cagA )-modulated bacterial adaption strategy by enhancing the expression of ATP-binding cassette transporter-related genes, metQ and HP_0888 , upon coculturing with human gastric epithelial cells. We observed a general repression of electron transport-associated genes by cagA , leading to the activation of oxidative phosphorylation. Temporal profiling of host mRNA signatures revealed the downregulation of multiple splicing regulators due to bacterial infection, resulting in aberrant pre-mRNA splicing of functional genes involved in the cell cycle process in response to H. pylori infection. Moreover, we demonstrated a protective effect of gastric H. pylori colonization against chronic dextran sulfate sodium (DSS)-induced colitis. Mechanistically, we identified a cluster of propionic and butyric acid-producing bacteria, Muribaculaceae , selectively enriched in the colons of H. pylori -pre-colonized mice, which may contribute to the restoration of intestinal barrier function damaged by DSS treatment. Collectively, this study presents the first dual-transcriptome analysis of H. pylori during its dynamic interaction with gastric epithelial cells and provides new insights into strategies through which H. pylori promotes infection and pathogenesis in the human gastric epithelium., Importance: Simultaneous profiling of the dynamic interaction between Helicobacter pylori and the human gastric epithelium represents a novel strategy for identifying regulatory responses that drive pathogenesis. This study presents the first dual-transcriptome analysis of H. pylori when cocultured with gastric epithelial cells, revealing a bacterial adaptation strategy and a general repression of electron transportation-associated genes, both of which were modulated by cytotoxin-associated gene A ( cagA ). Temporal profiling of host mRNA signatures dissected the aberrant pre-mRNA splicing of functional genes involved in the cell cycle process in response to H. pylori infection. We demonstrated a protective effect of gastric H. pylori colonization against chronic DSS-induced colitis through both in vitro and in vivo experiments. These findings significantly enhance our understanding of how H. pylori promotes infection and pathogenesis in the human gastric epithelium and provide evidence to identify targets for antimicrobial therapies., Competing Interests: The authors declare no conflict of interest.

Published
2024
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