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Tracking dynamic evolution of catalytic active sites in photocatalytic CO2 reduction by in situ time-resolved spectroscopy

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Rare Metals 2020年第6期39卷 607-609页

作者： guo-zhu chen Ke-Jun chen Jun-Wei Fu Min Liu School of Physics and Electronics State Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083China

In situ time-resolved spectroscopy is an effective method to monitor the catalysis reaction in real time and reveal the catalytic mechanistic *** dynamic evolution of coordination and electronic structures of catalytic active sites during the CO2 reduction reaction is still a "black box," impeding the design of high-efficiency *** a recent report published in ***.,by multiple in situ time-resolved spectroscopy.

关键词： spectroscopy. resolved catalytic

Repairing whole facial nerve defects with xenogeneic acellular nerve grafts in rhesus monkeys

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Neural Regeneration Research 2022年第5期17卷 1131-1137页

作者： guo-chen zhu Da-Jiang Xiao Bi-Wen zhu Yan Xiao Department of Otorhinolaryngology-Head and Neck Surgery Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityWuxiJiangsu ProvinceChina Department of Otorhinolaryngology-Head and Neck Surgery Affiliated Wuxi Clinical College of Nantong UniversityWuxiJiangsu ProvinceChina College of Animal Science&Technology Zhongkai University of Agriculture and EngineeringGuangzhouGuangdong ProvinceChina Department of Pathology Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityWuxiJiangsu ProvinceChina

Acellular nerve allografts conducted via chemical extraction have achieved satisfactory results in bridging whole facial nerve defects clinically,both in terms of branching a single trunk and in connecting multiple branches of an extratemporal ***,in the clinical treatment of facial nerve defects,allogeneic donors are *** this experiment,we exposed the left trunk and multiple branches of the extratemporal segment in six rhesus monkeys and dissected a gap of 25 mm to construct a monkey model of a whole left nerve *** monkeys were randomly assigned to an autograft group or a xenogeneic acellular nerve graft *** the autograft group,the 25-mm whole facial nerve defect was immediately bridged using an autogenous ipsilateral great auricular nerve,and in the xenogeneic acellular nerve graft group,this was done using a xenogeneic acellular nerve graft with *** of facial symmetry,nerve-muscle electrophysiology,retrograde transport of labeled neuronal tracers,and morphology of the regenerated nerve and target muscle at 8 months postoperatively showed that the faces of the monkey appeared to be symmetrical in the static state and slightly asymmetrical during facial movement,and that they could actively close their eyelids *** degree of recovery from facial paralysis reached House-Brackmann grade II in both *** muscle action potentials were recorded and orbicularis oris muscles responded to electro-stimuli on the surgical side in each *** Gold-labeled neurons could be detected in the facial nuclei on the injured *** staining showed abundant neurofilament-200-positive axons and soluble protein-100-positive Schwann cells in the regenerated nerves.A large number of mid-graft myelinated axons were observed via methylene blue staining and a transmission electron *** together,our data indicate that xenogeneic acellular nerve grafts from minipigs are safe and effec

关键词： acellular nerve compound muscle action potentials facial nerve defect facial symmetry monkey nerve graft nerve regeneration retrograde labeling test synaptophysin xenogeneic

Solvent extraction of U(Ⅵ) by N,N-dimethyl-N',N'-dioctylsuccinylamide and N,N-dimethyl-N',N'-didecylsuccinylamide in cyclohexane

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Nuclear Science and Techniques 2016年第3期27卷 68-73页

作者： Yu Cui Xiao-Feng Yang cheng Yang Ye-Xin Li guo-zhu chen guo-Xin Sun School of Chemistry and Chemical Engineering University of Jinan

The extraction of uranyl nitrate by novel extractants of N,N-dimethyl-N',N'-dioctylsuccinylamide(DMDOSA)and N,N-dimethyl-N',N'-didecylsuccinylamide(DMDDSA) from aqueous nitric/nitrate solutions was *** was found both the concentration of HNO_3 and extractants had an effect on the U(Ⅵ) extraction *** extraction mechanism was established,and stoichiometry of the main extracted species was confirmed to be UO_2(NO_3)_2·2DMDOSA and UO_2(NO_3)_2·2DMDDSA,*** of the extraction reactions are *** spectral study of the U(Ⅵ) extracted species was also made.

关键词：溶剂萃取二甲基环己烷 ftir光谱硝酸铀酰化学计量比 O3浓度萃取反应

Cystadenoma in a seminal vesicle is cured by laparoscopic ablation

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Asian Journal of Andrology 2013年第5期15卷 697-698页

作者： Jian-guo zhu Wei-Hong chen Shu-Xiong Xu Rong-Ping Wang Zhao-Lin Sun Department of Urology The People's Hospital of Guizhou Province Guiyang 550001 China

Dear Editor, We present here a case report of a benign seminal vesicle cystadenoma treated with laparoscopic ablation in a 31-year-old man. The clinical presentation, gross appearance, microscopic characteristics, im... 详细信息

关键词： Cystadenoma seminal vesicle laparoscopic ablation

Influence of motor cable on common-mode currents in an inverter-fed motor drive system

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Frontiers of Information Technology & Electronic Engineering 2018年第2期19卷 273-284页

作者： Peng-kang XIE Jia-zheng LU guo-zhu chen Heng-lin chen College of Electrical Engineering Zhejiang University State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission and Distribution Equipment State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center

Induction motor drive systems fed by cables are widely used in industrial applications. However, high-frequency switching of power devices will cause common-mode（CM） voltages during operation, leading to serious CM currents in the motor drive systems. CM currents through the cables and motors in the drive systems can cause electromagnetic interference（EMI） with the surrounding electronic equipment and shorten the life of induction motors. Therefore, it is necessary to analyze the CM currents in motor drive systems. In this paper, high-frequency models of unshielded and shielded power cables are formulated. The frequency-dependent effects and mutual inductances of the cables are taken into account. The power cable parameters are extracted by the finite element method and validated by measurements. High-frequency models of induction motors and inverters are introduced from existing works. The CM currents at the motor and inverter terminals are obtained, and the influence of the cable length and cable type on the CM currents is analyzed. There is a good agreement between the experimental results and the CM currents predicted by the proposed models.

关键词： Common-mode currents Cable model Motor drive system Parameter extraction

A multi-modular shunt active power filter system and its novel fault-tolerant strategy based on split-phase control and real-time bus communication

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Frontiers of Information Technology & Electronic Engineering 2018年第9期19卷 1166-1179页

作者： Qun-wei XU Jin-xiang ZHAN Long XIAO guo-zhu chen College of Electrical Engineering Zhejiang Universit State Grid Zhejiang Electric Power Research Institut

We first present a new multi-modular shunt active power filter system suitable for large-capacity compensation. Each module in the system has the same circuit topology, system functionality, and controller design, to achieve coordination control among the modules. The module＇s reference signals are obtained by multiplying the total reference signal by the respective distribution coefficient. Next, a novel fault-tolerant approach is proposed based on split-phase control in the a-b-c frame and real-time bus communication. When a phase fault occurs, instead of halting the whole module, the proposed strategy isolates only the faulted bridge arm, and then recalculates the distribution coefficients and transfers the compensation capacity to the same phases of the other normal modules, resulting in a continuous operation of the faulted module and optimization of the remaining usable power devices. Through steady-state analysis of the post-fault circuit, the system stability and control reliability are proven to be high enough to guarantee its engineering application value. Finally, a prototype is established and experimental results show the validity and feasibility of the proposed multi-modular system and its fault-tolerant control strategy.

关键词： Shunt active power filter Fault-tolerant topology Split-phase control Bus communication

Cyano migration-mediated radical-polar crossover cyclopropanation

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Science China Chemistry 2025年第1期68卷 241-248页

作者： Ziqiang Wang Yasu chen Jie Li chen zhu Key Laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Frontiers Science Center for Transformative Molecules Zhangjiang Institute for Advanced Study and Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240China

We report a novel cyano migration-mediated radical-polar crossover process,whereby both the sulfonylcyanation of aliphatic alkenes and the formation of cyclopropanes are concurrently *** transformation yields a diverse array of multisubstituted cyclopropanes under mild photocatalytic *** studies elucidate that the reaction proceeds via intramolecular nucleophilic substitution,leading to the formation of the cyclopropane derivatives.

关键词： cyclopropanation cyano migration radical-polar crossover radical reactions

The gut microbial metabolite indole‑3‑aldehyde alleviates impaired intestinal development by promoting intestinal stem cell expansion in weaned piglets

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Journal of Animal Science and Biotechnology 2025年第1期16卷 455-470页

作者： Jiaqi Zhang Yahui chen Xin guo Xuan Li Ruofan Zhang Mengting Wang Weiyun zhu Kaifan Yu Laboratory of Gastrointestinal Microbiology Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal HealthCollege of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095China National Center for International Research on Animal Gut Nutrition Nanjing Agricultural UniversityNanjing 210095China Wujiang Animal Health Inspection Institute Suzhou 215200China

Background Weaning stress-induced diarrhea is widely recognized as being associated with gut microbiota ***,it has been challenging to clarify which specific intestinal microbiota and their metabolites play a crucial role in the antidiarrhea process of weaned *** In this study,we first observed that piglets with diarrhea exhibited a lower average daily gain and higher diarrhea score,and elevated levels of lipopolysaccharide(LPS)and D-lactate(D-LA)compared to healthy ***,we analyzed the differences in intestinal microbial composition and metabolite levels between healthy and diarrheal weaned *** piglets demonstrated intestinal microbiota dysbiosis,characterized pri-marily by a higher Firmicutes to Bacteroidota ratio,a deficiency of Lactobacillus amylovorus and Lactobacillus reuteri,and an increased abundance of Bacteroides ***-5287 and Bacteroides *** pro-filing of the gut microbiota based on Kyoto Encyclopedia of Genes and Genomes(KEGG)data was performed,and the results showed that tryptophan metabolism was the most significantly inhibited pathway in piglets with *** tryptophan metabolites were detected at lower concentrations in diarrheal piglets than in healthy ***,we explored the effects of dietary indole-3-aldehyde(IAld),a key tryptophan metabolite,on intestinal development and gut barrier function in weaned *** with 100 mg/kg IAld in the diet increased the small intestine index and improved intestinal barrier function by promoting intestinal stem cell(ISC)expansion in *** promotion of ISC expansion by IAld was also confirmed in porcine intestinal *** These findings revealed that intestinal microbial tryptophan metabolite IAld alleviates impaired intesti-nal development by promoting ISC expansion in weaned piglets.

关键词： Indole-3-aldehyde Intestinal development Intestinal microbiota Intestinal stem cell Weaned piglets

Sequence-activated chemiluminescence probes:programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第1期68卷 26-34页

作者： Yutao Zhang Juan Li Wei-Hong zhu Zhiqian guo Shanghai Key Laboratory of Functional Materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science&TechnologyShanghai 200237China

Sequence-activated chemiluminescence(CL)technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial *** fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest,thus enabling high-contrast signals under complex physiological *** sequential activation could be triggered by enzymes,reactive oxygen species(ROS),biothiols or changes in the *** unique sequence-activated CL probes bestow several advantages,including minimal background,deep-tissue penetration,and the ability of non-invasive or minimally invasive *** sequence-activated CL techniques represent a significant advancement in molecular imaging and *** this mini-review,we focus on the latest developments in sequential CL probes,addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

关键词： chemiluminescnece sequence-activation in-vivo bioimaging cyclic peroxide