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Your search keyword '"Jiang, Yan-Xia"' showing total 219 results
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219 results on '"Jiang, Yan-Xia"'

11. Artificial photosynthetic system for diluted CO2 reduction in gas-solid phase.

Author

Wang, Ya, Wei, Jian-Xin, Tang, Hong-Liang, Shao, Lu-Hua, Dong, Long-Zhang, Chu, Xiao-Yu, Jiang, Yan-Xia, Zhang, Gui-Ling, Zhang, Feng-Ming, and Lan, Ya-Qian

Subjects
CARBON offsetting, GAS as fuel, METAL-organic frameworks, INDUSTRIAL capacity, GIBBS' free energy, FLUE gases
Abstract

Rational design of robust photocatalytic systems to direct capture and in-situ convert diluted CO2 from flue gas is a promising but challenging way to achieve carbon neutrality. Here, we report a new type of host-guest photocatalysts by integrating CO2-enriching ionic liquids and photoactive metal-organic frameworks PCN-250-Fe2M (M = Fe, Co, Ni, Zn, Mn) for artificial photosynthetic diluted CO2 reduction in gas-solid phase. As a result, [Emim]BF4(39.3 wt%)@PCN-250-Fe2Co exhibits a record high CO2-to-CO reduction rate of 313.34 μmol g−1 h−1 under pure CO2 atmosphere and 153.42 μmol g−1 h−1 under diluted CO2 (15%) with about 100% selectivity. In scaled-up experiments with 1.0 g catalyst and natural sunlight irradiation, the concentration of pure and diluted CO2 (15%) could be significantly decreased to below 85% and 10%, respectively, indicating its industrial application potential. Further experiments and theoretical calculations reveal that ionic liquids not only benefit CO2 enrichment, but also form synergistic effect with Co2+ sites in PCN-250-Fe2Co, resulting in a significant reduction in Gibbs energy barrier during the rate-determining step of CO2-to-CO conversion. Artificial photosynthetic diluted CO2 reduction from fuel gas is promising but challenging for carbon neutrality. Here, the authors report a host-guest system by integrating CO2-enriching ionic liquids and photoactive metal-organic frameworks, greatly enhancing CO2-to-CO conversion efficiency. [ABSTRACT FROM AUTHOR]

Published
2024
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31. The Combination of Long-term Ketamine and Extinction Training Contributes to Fear Erasure by Bdnf Methylation

Author

Jian-Jun Yang, Ling-Sha Ju, Jiao-Jiao Yang, Lei Lei, Jiang-Yan Xia, Dan Luo, Mu-Huo Ji, and Anatoly E. Martynyuk

Subjects
ketamine, extinction, inescapable foot shocks, DNA methylation, BDNF, Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571
Abstract

A combination of antidepressant drugs and psychotherapy exhibits more promising efficacy in treating fear disorders than either treatment alone, but underlying mechanisms of such treatments remain largely unknown. Here we investigated the role of DNA methylation of the brain-derived neurotrophic factor (Bdnf) gene in the therapeutic effects of ketamine in combination with extinction training in a mouse model of post-traumatic stress disorder (PTSD) induced by inescapable electric foot shocks (IFS). Male mice received ketamine for 22 consecutive days starting 1 h after the IFS (long-term ketamine treatment) or 2 h prior to the extinction training on days 15 and 16 after the IFS (short-term ketamine treatment). The Open Field (OF) and Elevated Plus Maze (EPM) tests were conducted on days 18 and 20. The spontaneous recovery and fear renewal tests were performed on day 23. Mice, subjected to IFS, exhibited anxiety-like behavior and fear relapse, accompanied by the increased levels of DNA methyltransferases, hyper-methylation of Bdnf gene, and decreased BDNF mRNA expression in the medial prefrontal cortex (mPFC) and hippocampus (HIP). Long-term treatment with ketamine combined with extinction training alleviated the IFS-induced abnormalities. These results suggest that long-term ketamine treatment in combination with extinction training may ameliorate fear relapse in the murine model of PTSD, at least in part, by normalizing DNA methylation of Bdnf gene.

Published
2017
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33. Reduced inhibitory and excitatory input onto parvalbumin interneurons mediated by perineuronal net might contribute to cognitive impairments in a mouse model of sepsis-associated encephalopathy

Author

Ling Zhang, Yu-Zhu Gao, Chun-Jie Zhao, Jiang-Yan Xia, Jian-Jun Yang, and Mu-Huo Ji

Subjects
Pharmacology, Cellular and Molecular Neuroscience
Abstract

Sepsis-associated encephalopathy (SAE) is commonly defined as diffuse brain dysfunction and can manifest as delirium to coma. Accumulating evidence has suggested that perineuronal net (PNN) plays an important role in the modulation of the synaptic plasticity of central nervous system. We here investigated the role of PNN in SAE induced by lipopolysaccharide (LPS) injection. Behavioral tests were performed by open field, Y-maze, and fear conditioning tests at the indicated time points. The densities of vesicular γ-aminobutyric acid transporter, vesicular glutamate transporter 1, PNN, and parvalbumin (PV) in the hippocampus were evaluated by immunofluorescence. Matrix metalloproteinases-9 (MMP-9) expression and its activity were detected by Western blot and gel zymography, respectively. Local field potential was recorded by in vivo electrophysiology. LPS-treated mice displayed significant cognitive impairments, coincided with activated MMP-9, decreased PNN and PV densities, reduced inhibitory and excitatory input onto PV interneurons enwrapped by PNN, and decreased gamma oscillations in hippocampal CA1. Notably, MMP-9 inhibitor SB-3CT treatment rescued most of these abnormalities. Taken together, our study demonstrates that active MMP-9 mediated PNN remodeling, leading to reduced inhibitory and excitatory input onto PV interneurons and abnormal gamma oscillations in hippocampal CA1, which consequently contributed to cognitive impairments after LPS injection.

Published
2023

47. The Quasi-Pt-Allotrope Catalyst: Hollow PtCo@single-Atom Pt 1 on Nitrogen-Doped Carbon toward Superior Oxygen Reduction

Author

Lai, Weihong, Zhang, Binwei, Hu, Zhenpeng, Qu, Xi-Ming, Jiang, Yan-Xia, Wang, Yunxiao, Wang, Jiazhao, Liu, Hua-Kun, Chou, Shulei, Lai, Weihong, Zhang, Binwei, Hu, Zhenpeng, Qu, Xi-Ming, Jiang, Yan-Xia, Wang, Yunxiao, Wang, Jiazhao, Liu, Hua-Kun, and Chou, Shulei

Abstract

Single-atom Pt and bimetallic Pt 3 Co are considered the most promising oxygen reduction reaction (ORR) catalysts, with a much lower price than pure Pt. The combination of single-atom Pt and bimetallic Pt 3 Co in a highly active nanomaterial, however, is challenging and vulnerable to agglomeration under realistic reaction conditions, leading to a rapid fall in the ORR. Here, a sustainable quasi-Pt-allotrope catalyst, composed of hollow Pt 3 Co (H-PtCo) alloy cores and N-doped carbon anchoring single atom Pt shells (Pt 1 N-C), is constructed. This unique nanoarchitecture enables the inner and exterior spaces to be easily accessible, exposing an extra-high active surface area and active sites for the penetration of both aqueous and organic electrolytes. Moreover, the novel Pt 1 N-C shells not only effectively protect the H-PtCo cores from agglomeration but also increase the efficiency of the ORR in virtue of the isolated Pt atoms. Thus, the H-PtCo@Pt 1 N-C catalyst exhibits stable ORR without any fade over a prolonged 10 000 cycle test at 0.9 V in HClO 4 solution. Furthermore, this material can offer efficient and stable ORR activities in various organic electrolytes, indicating its great potential for next-generation lithium-air batteries as well.

Published
2019

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