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29 results on '"Zhang, Dechang"'

7. Revealing Anion Exchange in Two-Dimensional Nanocrystals

Author

Deng, Yalei, Li, Yaobo, Yang, Yuelin, Kong, Xinke, Zhang, Dechang, Deng, Yu, Meng, Zhen, Zeng, Zaiping, and Wang, Yuanyuan

Abstract

Ion exchange is a powerful postsynthesis tool for the design of functional nanomaterials. However, achieving anion exchange while maintaining the original morphology and crystal structure, as well as elucidating the mechanism, remains challenging. Here, we developed an anion-exchange strategy under mild conditions and revealed an unusual ion-exchange mechanism in the semiconductor nanoplatelets. Kinetic studies have demonstrated that the transformation follows first-order kinetics, with the ligand restricting the guest anion from diffusing only in one-dimensional directions. By monitoring the reaction process, we demonstrated that the anion exchange reaction occurs selectively on the polar surface of the NPLs and exhibits asymmetry at the two polar end faces. Theoretical simulations further confirmed that anion exchange began from the chalcogenide-dominated facet. The thermodynamic data suggest that guest ions diffuse into the crystal interior via a direct exchange mechanism. This study provides a pathway for anion exchange and the construction of functional nanocrystals and a platform for studying the optoelectronic behavior of single-sheet heterojunctions.

Published
2024
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18. Carboxyamidotriazole exerts anti‑inflammatory activity in lipopolysaccharide‑induced RAW264.7 macrophages by inhibiting NF‑κB and MAPKs pathways

Author

Lu, Shan, primary, Duan, Mengyuan, additional, Guo, Zehao, additional, Zhou, Yongting, additional, Wu, Danwei, additional, Zhang, Xiaojuan, additional, Wang, Yicheng, additional, Ye, Caiying, additional, Ju, Rui, additional, Li, Juan, additional, Zhang, Dechang, additional, and Zhu, Lei, additional

Published
2020
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28. U50488 inhibits outwardly rectifying potassium channel in PC12 cells via pertussis toxin-sensitive G-protein

Author

Li, Zhisong, Guo, Lei, Ye, Caiying, and Zhang, Dechang

Subjects
*OPIOID receptors, *POTASSIUM, *ION channels, *POTASSIUM channels, *ALKALOIDS, *ADENYLATE cyclase
Abstract

Abstract: This study was undertaken to determine the effect of U50488, a κ-opioid receptor agonist, on outwardly rectifying potassium channel (Ik) in undifferentiated PC12 cells. Using whole-cell and on-cell patch–clamp techniques, we found that U50488 decreased Ik amplitude in a time-dependent manner and Ik activation was delayed. Single-channel kinetic analysis provided a two-stage model for us to illuminate the blockage effect induced by U50488. To identify whether U50488 mediates the effect through opioid receptor and G-protein, several specific blockers and activators were used. Not only naloxone but also PTX and GDPβS abolished U50488-induced suppression; however, such effect was not observed when cAMP or other adenylyl cyclase activators were used. It is postulated that κ-opioid receptor and Gi/o protein, but not cAMP, are involved in U50488-induced suppression of Ik. [Copyright &y& Elsevier]

Published
2006
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29. THE TRANSMEMBRANE SIGNAL TRANSDUCTION IN HEp-2 CELLS INDUCED BY BACTERIAL ADHERENCE.

Author

Guan Yuanzhi, Xue Li, Ye Caiying, and Zhang Dechang

Subjects
*CELLULAR signal transduction, *ESCHERICHIA coli diseases
Abstract

Focuses on the role of transmembrane signal transduction of host cell in the early steps of infection. Examination of the adherence of E. coli to HEp-2 cells; Increase in the inositol triphosphate (IP-3) level in HEp-2 cells following the adherence of E. coli; Correlation between the adherence of the bacteria and the increase in IP-3.

Published
2000

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