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Engineering Ru(N^N)_(3)-modified covalent organic framework for photocatalytic olefin epoxidation

Science China Chemistry 2024年第11期67卷 3719-3728页

作者： Yan-lin li sheng-li huang Guo-Yu Yang Key Laboratory of Cluster Science(Ministry of Education) Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Photocatalytic olefin oxidation using air as an oxidant is an environmentally friendly method for producing epoxides. Covalent organic frameworks(COFs) have emerged as promising photocatalysts in various organic synthesis reactions. The combination of tri-(2-pyridinal aldehyde)-containing precursor with 4,4’,4’’-(1,3,5-triazine-2,4,6-triyl)trianiline generated(N^N)-I-COF. Via imine-to-quinoline transformation and coordination anchorage of Ru(N^N)_(3)unit, Ru(N^N)_(3)@Q-COF was obtained with improved chemical stability, skeleton conjugation, and novel photochemical characteristics, and demonstrated excellent photocatalytic activity in olefin epoxidation with a wide range of substrates. The presence of H_(2)O played a crucial role in the formation of reactive oxygen species(ROSs), which in turn influenced the olefin oxidation process. The hydrophilicity of Ru(N^N)_(3) facilitated the approach of H_(2)O and O_(2) to the photogenerated charges, thereby promoting ROSs generation. The lipophilicity of Q-COF allowed for the absorption of olefin substrates, and its nano-channels increased encountering possibility between olefins and ROSs. Consequently, Ru(N^N)_(3)@Q-COF provided an intriguing platform for olefin photooxidation and could be recycled multiple times without any degradation in performance. This report revealed that the conversion of classical ROSs into less potent oxidants with rapid kinetic rates played a crucial role in achieving highly efficient and selective epoxidation of terminal olefins.

关键词： polypyridyl Ru covalent organic framework olefin epoxidation photocatalysis

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Trophic states and nutrient storage of reservoirs in Chongqing

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Chinese Journal Of Geochemistry 2008年第3期27卷 310-316页

作者： ZHANG sheng li Chongming huang Shuming ZHENG Jian Chongqing Academy of Environmental Science Chongqing 400021 China

The trophic states of 35 reservoirs were investigated in the region of Chongqing,Southwest *** results showed that the concentrations of nutrients and chlorophyll a were high and organic pollution and transparence(SD) were low in the water *** concentrations of total nitrogen(TN) range from 0.52 mg/L to 5.94 mg/L and those of total phosphorus(TP) range from 0.002 mg/L to 0.598 mg/*** oxygen demand(COD) ranges from 0.75 mg/L to 9.3 mg/L and SD ranges from 0.48 m to 3.2 *** was a significant positive correlation between COD and chlorophyll a,but a significant negative correlation between SD and chlorophyll *** terms of the integrated nutrition state index,the eutrophication states of the reservoirs were *** the investigated reservoirs,about 22 reached the grade of *** one reservoir was in the state of oligotropher,the rest were in the state of *** nutrition state indices range from 25.4 to *** storage capacity of nutrients in the reservoirs was *** stored TN,TP and COD were about 4731,206 and 10259 t,*** main pollution sources are industrial and domestic *** the development of aquaculture,the contamination level increases gradually.

关键词：中国重庆生物链营养储量

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Thoracic para-aortic lymph node recurrence in patients with esophageal squamous cell carcinoma:A propensity score-matching analysis

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World Journal of Clinical Cases 2022年第36期10卷 13313-13320页

作者： Xu-Yuan li li-sheng huang Shu-Han Yu Dan Xie Department of Medical Oncology Shantou Central HospitalShantou 515041Guangdong ProvinceChina Department of Radiation Oncology Cancer Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina Department of Radiology Shantou Central HospitalShantou 515041Guangdong ProvinceChina

BACKGROUND Thoracic para-aortic lymph node(TPLN)recurrence in esophageal squamous cell carcinoma(ESCC)is rare and its impact on survival is *** studied survival in patients with ESCC who developed TPLN *** To study the survival in patients with ESCC who developed TPLNs *** Data were collected retrospectively for 219 patients who had undergone curative surgery for ESCC during January 2012 to November 2017 and who developed recurrences(36.29%of 604 patients who had undergone curative surgeries for ESCC).The patients were classified into positive(+)and negative(-)TPLN metastasis *** also investigated TPLN recurrence in 223 patients with ESCC following definitive chemoradiotherapy during *** propensity score matching(PSM)and survival estimation,factors predictive of overall survival(OS)were explored using a Cox proportional hazards *** Among the patients with confirmed recurrence,18 were TPLN(+)and 13 developed synchronous distant *** PSM,TPLN(+)was associated with worse recurrence-free(P=0.00049)and OS[vs TPLN(-);P=0.0027],whereas only the intergroup difference in recurrence-free survival remained significant after PSM(P=0.013).The Cox analysis yielded similar *** the patients who had received definitive chemoradiotherapy,3(1.35%)had preoperative TPLN enlargement and none had developed *** TPLN metastasis is rare but may be associated with poor survival.

关键词： Esophageal cancer Surgery Thoracic para-aortic lymph node Overall survival Metastasis

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Deposition of copper nanoparticles on multiwalled carbon nanotubes modified with poly （acrylic acid） and their antimicrobial application in water treatment

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Frontiers of Environmental Science & Engineering 2015年第4期9卷 625-633页

作者： li sheng Shuhang huang Minghao SUI lingdian ZHANG Lei SHE Yong CHEN State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University Shanghai 200092 China

A novel hybrid material, Cu-PAA/MWCNTs （copper nanoparticles deposited multiwalled carbon nano- tubes with poly （acrylic acid） as dispersant, was prepared and expected to obtain a more effective and well-dispersed disinfection material for water treatment. X-ray energy dispersive spectroscopy （EDS）, transmission electron microscopy （TEM）, the X-ray fluorescence （XRF）, X-ray photoelectron spectra （XPS）, Fourier transform infrared spectra （FT-IR）, Raman spectroscopy, and thermal gravi- metric analyzer （TGA） were used to characterize the Cu- PAA/MWCNTs. Escherichia coli （E. coil） was employed as the target bacteria. The cell viability determination and fluorescence imaging results demonstrated that Cu-PAA/ MWCNTs possessed strong antimicrobial ability on E. coil. The deposited Cu was suggested to play an important role in the antimicrobial action of Cu-PAA/MWCNTs.

关键词： multiwalled carbon nanotubes copper nanoparticles antimicrobial activity Escherichia coli (E. coil)

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Influence of Isotope Substitution Helium Atom on Partial Cross Sections in He-HF Collisions

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Communications in Theoretical Physics 2009年第11期52卷 924-928页

作者： YU Chun-Ri ZHANG Jie CHEN li JIANG Gui-sheng huang Guo-Dong School of Physics ＆ Electric Engineering Anqing Teachers College Anqing 246133 China

Close-coupling equation and anisotropic potential developed in our previous research are applied to HE-SHe （4He, 6He, 8He,10He） collision system, and partial cross sections （PCSs） at the incident energy of 40 me V are calculated. By analyzing the differences of these PCSs, change rules of PCSs with the increase of partial wave number, and with the change of the mass of isotope substitution helium atom are obtained. The results show that excitation PCSs converge faster than elastic PCSs for collision energy and each of systems considered here. Also excitation PCSs converge more rapidly for high-excited states. Tail effect is present only in elastic scattering and low-excited states but not in high- excited states. With the increase of the mass of isotope substitution helium atom, converging speed of elastic, total inelastic, and state-to-state excitation PCS slows down, and the maxima of these PCSs undergoes a regular change.

关键词： isotope substitution partial cross section close-coupling equation He-HF collision

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Aging Behaviors of W-Ni-Fe Ternary Alloys with High Ni-to-Fe Ratios

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Journal of Materials Science & Technology 2003年第6期19卷 631-633页

作者： Ronghua li, Jihua huang, sheng YIN and Jun ZHAOSchool of Materials Science & Engineering, University of Science & Technology Beijing, Beijing 100083, China Sch. of Mat. Sci. and Eng. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The hardness variation of two kinds of alloys with 36 wt pct W content and 7/3, 9/1 Ni-to-Fe ratios during strain aging at 800℃ was studied. The microstructures of the aged alloys were analyzed by X-ray diffraction and TEM. The results show that the strain aging hardness of W-Ni-Fe ternary alloy with 7/3 Ni-to-Fe ratio decreases monotonically with the increase of aging time. Under the same conditions, the hardness of 9/1 Ni-to-Fe ratio alloy decreases in the initial aging stage, but then increases as aging process goes on. X ray diffraction and TEM analysis show that there is not any precipitation depositing from the alloy with 7/3 Ni-to-Fe ratio during aging. The monotonic decrease in hardness of this alloy during aging process results from the recovery, recrystallization and solid solubility declining. In the alloy of 9/1 Ni-to-Fe ratio, the fine β phase precipitates dispersively during aging which hardens the alloy. The two different kinds of mechanisms (the softening one and the hardening one) decide the hardness variation of the alloy with 9/1 Ni-to-Fe ratio mentioned above.

关键词： W-Ni-Fe Tungsten heavy alloys Ni-to-Fe ratio Strain aging β phase

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N Accumulation and Translocation in Four Japonica Rice Cultivars at Different N Rates

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Pedosphere 2007年第6期17卷 792-800页

作者： ZHANG Yao-Hong FAN Jian-Bo ZHANG Ya-li WANG Dong-sheng huang Qi-Wei SHEN Qi-Rong College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 （China）

Developing high-yielding rice(Oryza sativa L.)cultivars depends on having a better understanding of nitrogen(N) accumulation and translocation to the ear during the reproductive *** experiments were carried out to evaluate the genetic variation for N accumulation and translocation in different Japonica rice cultivars at different N rates and to identify any relationship to grain yield in southeast *** Japonica cultivars with similar agronomic characteristics were grown at two experimental sites in 2004 with three N rates of 0,60,and 180 kg N ha^(-1).Dry weights and N contents of rice plants were measured at tillering,initiation,anthesis,and *** yields exhibited significant differences (Plication *** N rates improved N uptake at anthesis and maturity in all four cultivars(Plinear to N uptake at anthesis(r^2=0.78^(**))and N translocation(r^2=0.67^(**)).Thus,cultivars with a high N uptake at anthesis,low residual N in the straw at maturity,and appropriate low N fertilizer supply in southeast China should efficiently increase N-recovery rate while maintaining grain yield and soil fertility.

关键词： rain yield Japonica rice cultivar N accumulation N application rate N translocation

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Functional Cp*Rh-based Metallacycles with Cu-Salen: Superstructure-Dependent Oxidative Coupling Reaction

Functional Cp*Rh-based Metallacycles with Cu-Salen: Superstr...

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第十七届全国金属有机化学学术讨论会

作者： sheng-li huang Guo-Xin Jin Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Department of Chemistry Advanced Materials Laboratory Fudan University

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Inhibition of interleukin-13 gene expression in T cells through GATA-3 pathway by arsenic trioxide

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Chinese Medical Journal 2008年第22期121卷 2346-2349页

作者： YAO Xin HE Hai-yan YANG Yan DAI Shan-lin SUN Pei-li YIN Kai-sheng huang Mao Department of Respiratory Diseases the First Affiliated Hospital of Nanjing Medical University Nanjing Jiangsu 210029 China

Aarsenic trioxide （AT） has a long history of use in both traditional Chinese medicine and in modem medicine in asthma therapy. Recently, Yin et al＇ found that AT even at small doses reduced the airway inflammation of sensitized guinea pigs. However the mechanism underlying this is still largely unknown. Interleukin 13 （IL-13）, as one of the important TH2 cytokines, plays an important role in asthma pathogenesis through promoting eosinophilic inflammation,

关键词： interleukin-13 asthma GATA-3 arsenic trioxide

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A high time resolution multi-gap resistive plate chamber

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Nuclear Science and Techniques 2002年第1期13卷 6-10页

作者： li Cheng, WU Jian, WANG Xiao-lian, CHEN Hong-Fang, XU Zi-Zong, SHAO Ming, YE Shu-Wei, RUAN li-Juan, huang sheng-li (Department of Modern Physics, University of Science and Technology of China, Hefei 230027) Department of Modern Physics University of Science and Technology of China Hefei 230027

Research on a single cell Multi-gap Resistive Plate Chamber (MRPC) was carried out for the Time Of Flight detector (TOF) R and D of the STAR experi- ment. The property of the single chamber was tested with the test beam facility T10 at CERN in Geneva. The MRPC was scanned with the test beam to get the efficiency and time resolution at different position of the active area. The HV plateau was also measured. The time resolution is 65 ps which satisfies the requirement of STAR. The working mechanism of the MRPC is also explained.

关键词：原子核实验物理学探测器高时间分辨率

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