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684 results on '"Lu, Xuehong"'

10. Application of vacuum‐sealing drainage in buttonhole‐related arteriovenous fistula infection: A case report.

Author

Luo, Manyu, Ding, Yushuang, Qu, Zhijie, Feng, Wenyuan, and Lu, Xuehong

Subjects
STAPHYLOCOCCAL diseases, MEDICAL drainage, SURGICAL emergencies, INJURY complications, HEMODIALYSIS patients, ARTERIOVENOUS fistula
Abstract

Few studies have reported the application of vacuum‐sealing drainage of infected dialysis vascular access wounds. Herein, we present a case of buttonhole‐related arteriovenous fistula infection treated with vacuum‐sealing drainage. A 53‐year‐old female hemodialysis patient was hospitalized with an inflamed arteriovenous fistula. The patient underwent non‐tunneled catheterization for dialysis and was treated with moxifloxacin and vancomycin for staphylococcal infection. On Day 3, the skin overlying the inflamed fistula was ulcerated, resulting in severe hemorrhage. Emergency surgery was performed along with vacuum‐sealing drainage for fistula reconstruction. Vacuum‐sealing drainage accelerated the recovery of the wound without complications. No further access complications occurred during over a 3‐year follow‐up. [ABSTRACT FROM AUTHOR]

Published
2024
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26. Strategies to Enhance the Electrochromic Properties of Conjugated Polymers Bearing Pyromellitic Diimide Acceptors.

Author

Hui, Bryan Yat Kit, Chin, Kang Le Osmund, Lim, Jovan Jun Long, Soo, Xiang Yun Debbie, Lu, Xuehong, Zhu, Qiang, Liu, Xiaogang, Xu, Jianwei, and Chua, Ming Hui

Subjects
CONJUGATED polymers, RANDOM copolymers, IMIDES, ETHYLCELLULOSE, POLYMERS
Abstract

A series of conjugated polymers bearing thiophene‐based donors and pyromellitic diimide (PMDI) acceptor were prepared, and their electrochromic (EC) properties were studied via using fabricated thin‐film EC devices. It was observed that structurally regular alternating polymers with fewer (1 and 2) thiophene donors do not exhibit any EC properties while increasing the number of donors eventually led to the emergence of orange‐red‐to‐green colour switching. On this basis, two more random co‐polymers containing higher donor‐to‐acceptor ratios were synthesized to further improve EC switching properties. The two polymers, which bear a PMDI‐to‐thiophene ratio of ca. 1 : 7 and 1 : 8, revealed orange red‐to‐blue colour switching and generally improved optical contrasts and switching speeds in both the visible and near infra‐red (NIR) region. In addition, the subtle modulation of polymer colour and hue via variation of the number of thiophene donors was evident through colorimetric study. This work therefore demonstrates the potential and possibility of using the PMDI acceptor unit to construct EC‐active conjugated polymers, and considerations for future tuning of colour and switching performances. [ABSTRACT FROM AUTHOR]

Published
2024
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27. Construction of Fe Nanoclusters/Nanoparticles to Engineer FeN4 Sites on Multichannel Porous Carbon Fibers for Boosting Oxygen Reduction Reaction.

Author

Wang, Zhe, Lu, Zhe, Ye, Qitong, Yang, Zhenbei, Xu, Ruojie, Kong, Kexin, Zhang, Yifan, Yan, Tao, Liu, Yipu, Pan, Zhijuan, Huang, Yizhong, and Lu, Xuehong

Subjects
OXYGEN reduction, CARBON fibers, ATOMIC structure, NANOPARTICLES, ORBITAL hybridization, LITHIUM-air batteries, SOLID state batteries, IRON-based superconductors
Abstract

Fe–N–C catalysts are emerging as promising alternatives to Pt‐based catalysts for the oxygen reduction reaction (ORR), while they still suffer from sluggish reaction kinetics due to the discontented binding affinity between the Fe‐N4 sites and oxygen‐containing intermediates, and unsatisfactory stability. Herein, a flexible multichannel carbon fiber membrane immobilized with atomically dispersed Fe‐N4 sites and neighboring Fe nanoclusters/nanoparticles (FeN4‐FeNCP@MCF) is synthesized. The optimized geometric and electronic structures of the Fe atomic sites brought by adjacent Fe nanoclusters/nanoparticles and hierarchically porous structure of the carbon matrix endow FeN4‐FeNCP@MCF with outstanding ORR activity and stability, considerably outperforming its counterpart with FeN4 sites only and the commercial Pt/C catalyst. Liquid and solid‐state flexible zinc–air batteries employing FeN4‐FeNCP@MCF both exhibit outstanding durability. Theoretical calculation reveals that the Fe nanoclusters can trigger remarkable electron redistribution of the FeN4 sites and modulate the hybridization of central Fe 3d and O 2p orbitals, facilitating the activation of O2 molecules and optimizing the adsorption capacity of oxygen‐containing intermediates on FeN4 sites, and thus accelerating the ORR kinetic. This work offers an effective approach to constructing coupling catalysts that have single atoms coexisting with nanoclusters/nanoparticles for efficient ORR catalysis. [ABSTRACT FROM AUTHOR]

Published
2024
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