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Cerium oxide nanoparticles-mediated cascade catalytic chemo-photo tumor combination therapy

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Nano Research 2022年第1期15卷 333-345页

作者： Zitao hu yin Ding State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China

ROS-based tumor therapy based on nanocatalytic medicine has recently been proposed for its ***,a safe and highly efficient strategy towards getting high enough ROS to kill the hypoxic cancer cells is still a great ***,we report a simple ph/h_()20_(2)-activatable,O_(2)-evolving,and ROS regulating doxorubicin(DOX)and indocyanine green(ICG)co-loading PEGylated polyaniline(PANI)coated CeOx@polyacrylic acid(PAA)nanoclusters for highly selective and optimized cancer combination *** can selectively and greatly enhance intracellular O_(2) and ROS levels in tumor region,which depends on two-step catalytic properties of nanoceria(Ce^(4+)/Ce^(3+)=3.46,neutral surface charge,mostly localize into the cytoplasm,ph 7.4-6.5,catalase-like catalytic agents convert to Ce^(4+)/Ce^(3+)=0.58,negative surface charge,mostly localize into the lysosomes,ph 5-4,oxidase-like catalytic agents,triggered by near infrared(NIA)laser irradiation).Furthermore,the protective effect of polyethylene glycol(PEG),PANI,and PAA ensure that the nanoceria can only play the role of catalase under the irradiation of NIR light arrived at the tumor ***,loading of nanoceria and ICG onto PANI greatly enhanced photo thermal effect of nanoparticles.(NPs),which is useful for killing cancer cells by relieving hypoxia and promoting cross-membrane drug *** further enhance photodynamic therapy and chemotherapy *** chemo-photo combination therapies fantastically inhibited tumor growth and prevented tumor recurrence in vivo,suggesting a smart nanotheranostic system to achieve more precise and effective therapies in O_(2)-deprived tumor tissue.

关键词： nanocatalytic medicine photodynamic therapy hypoxia cerium oxide@polyaniline combination therapy

The hydrodynamic performance of a turbine in shallow free surface flow

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Journal of hydrodynamics 2021年第4期33卷 804-820页

作者： Zeda yin Mehdi Esmaeilpour Department of Mechanical Engineering College of Engineering and Computer SciencesMarshall UniversityHuntingtonWV25755USA

The performance and flow field of hydropower turbine in shallow water can be affected by the presence of free surface. Therefore, the influence of free surface on the turbine performance was studied through transient computational fluid dynamics (CFD) analysis. The turbine included three blades made of NACA0018 hydrofoil. Submerged depths and different tip speed ratio (TSR) were two main variables in this numerical simulation. A comprehensive simulation of quantities was performed for submerged depths ranging from h / R = 1.2 to 2.0, and tip speed ratio from λ = 1.0 to 30. The results revealed that the presence of the free surface decreased the power coefficient by 19.05% for the closest submerged depth of h / R = 1.2 at optimal tip speed ratio of λ = 2.5. The wave breaking also occurred when the submerged depth was smaller than h / R = 2.0. In the case of variable pitch, the top speeds for free-to-spin cases were investigated by 6DOF method. The top speed had a 4.24% drop by comparing the largest and the smallest submerged depths. Variable pitch also improved the power coefficient by 28.09% when the free surface was far from the hydropower turbine. however, the power coefficient improvement became significantly small when the hydropower turbine was placed close to the free surface.

关键词： hydropower turbine free surface computational fluid dynamics(CFD) Froude number tip speed ratio(TSR)

ph Overpotential for Unveiling the ph Gradient Effect of h^(+)/Oh^(−)Transport in Electrode Reaction Kinetics

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CCS Chemistry 2022年第1期4卷 369-380页

作者： Fengjun yin Ling Fang hong Liu Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714 Key Laboratory of Reservoir Aquatic Environment Chinese Academy of SciencesChongqing 400714 University of Chinese Academy of Sciences Beijing 100049

The ph gradient caused by h^(+)/Oh^(−)transport on an electrode surface is the key factor determining reaction performance,but its detailed impact on the electrode reaction kinetics has yet to be ***,the ph gradient effect was determined by developing electrode reaction equations,considering the overpotential assigned to the ph gradient called ph *** ph gradient effect was revealed to involve two aspects:(1)the Nernst ph overpotential,accounting for the common Nernst relationship with ph,and(2)the ph-dependent function of the electron-transfer coefficient(α_(ph)).Both parts were verified experimentally using oxygen reduction reaction and hydrogen evolution reaction,obviously,with differentα_(ph) ***α_(ph) function effect was clarified based on numerical calculations of the electrode reaction *** found that the effect could be assessed suitably by an apparent constant(α_(app))and a nonlinear fitting method proposed forα_(app) value *** results of this study provide the kinetic fundamentals of electrode reactions involving h^(+)/Oh^(−)and contribute to the understanding and assessment of their performance with the h^(+)/Oh^(−)transport effect.

关键词： ph overpotential ph gradient effect electrode reaction kinetics h^(+)and Oh^(−)transport hydrogen evolution reaction oxygen reduction reaction

Synthesis and Crystal Structure of a One-dimensional Infinite Chain Organotin Complex [(n-Bu)_3Sn(OCOC_5h_4NO)]_n

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1324-1327页

作者： yin han-Dong GAO Zhong-Jun LI Gang XU hao-Long hONG Min Department of Chemistry Liaocheng University Liaocheng 252059 China

A novel organotin complex [（n-Bu）3Sn（OCOC5h4NO）]n has been synthesized and characterized by elemental analysis, IR and ^1h NMR. The crystal structure has been determined by X-ray single-crystal diffraction. The crystal belongs to monoclinic, space group P2 1/c with a = 8.982（2）, b = 17.908（4）, c = 13.219（3） A, β= 96.981（4）°, Z = 4, V= 2110.6（8） A^3, Dc = 1.347 g/cm^3, μ（MoKa） = 12.23 cm^-1, F（000） = 880, R = 0.0497 and wR = 0.1263. In the molecular structure of the title complex, the tin atoms are five-coordinated in a distorted trigonal bipyramidal geometry. A one-dimensional linear polymer is formed through an interaction between the O atoms of pyridine-3-carboxylic acid N-oxide and tin atoms of an adjacent molecule.

关键词： organotin complex pyridine-3-carboxylic acid N-oxide synthesis crystal structure

Charge Engineering of Mo2C@Defect-Rich N-Doped Carbon Nanosheets for Efficient Electrocatalytic h2 Evolution

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Nano-Micro Letters 2019年第3期11卷 155-164页

作者： Chunsheng Lei Wen Zhou Qingguo Feng Yongpeng Lei Yi Zhang yin Chen Jiaqian Qin State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083People’s Republic of China College of Environmental and Safety Engineering Changzhou UniversityChangzhou213164People’s Republic of China Key Laboratory of Advanced Technologies of Materials Ministry of Educationand Institute of MaterialsDynamicsSouthwest Jiaotong UniversityChengdu610031SichuanPeople’s Republic of China hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and ChemicalEngineeringCentral South UniversityChangsha410083People’s Republic of China Metallurgy and Materials Science Research Institute Chulalongkorn UniversityBangkok10330Thailand

Charge engineering of carbon materials with many defects shows great potential in electrocatalysis,and molybdenum carbide(Mo2C)is one of the noble-metal-free electrocatalysts with the most ***,we study the Mo2C on pyridinic nitrogen-doped defective carbon sheets(MoNCs)as catalysts for the hydrogen evolution *** calculations imply that the introduction of Mo2C produces a graphene wave structure,which in some senses behaves like N doping to form localized *** an active electrocatalyst,MoNCs demonstrate a Tafel slope as low as 60.6 mV dec-1 and high durability of up to 10 h in acidic *** charge engineering,plentiful defects and hierarchical morphology also contribute to good *** work underlines the importance of charge engineering to boost catalytic performance.

关键词： Molybdenum carbide Nitrogen-doped carbon nanosheets Charge engineering Graphene wave hydrogen evolution reaction

Response dynamics of three defense related enzymes in cotton leaves to the interactive stress of helicoverpa armigera (hübner) herbivory and omethoate application

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Journal of Integrative Agriculture 2015年第2期14卷 355-364页

作者： ShA Pin-jie FAN yin-jun WANG Zhi-chao ShI Xue-yan Department of Entomology College of Agronomy and Biotechnology China Agricultural University

In order to explore the response dynamics of the activities of defense related enzymes in cotton leaves towards the interactive stress of helicoverpa armigera herbivory and omethoate application, the activities of phenylalanine ammonia-lyase（PAL）, lipoxygenase（LOX）, and polyphenol oxidase（PPO） were examined from 6 to 126 h after cotton leaves were treated 12 h of h. armigera herbivory, and then sprayed with 800 mg L–1 omethoate. The results showed that the changes in the activities of PAL, LOX and PPO that occured under the interactive stress of h. armigera herbivory and omethoate application reflected the interactive effects of the two stresses on cotton defense. The similarity between the response dynamics of PAL, LOX, and PPO activities in cotton leaves under the interactive stress and that under h. armigera herbivory treatment alone showed that the induction of h. armigera herbivory on the activities of PAL, LOX and PPO in cotton leaves played a leading role in the interactive effects, and the effect of omethoate application played only a minor role. A joint factor analysis was performed according to a method which has been used to analyze the joint toxicity of pesticides; this analysis sought to clarify if there was a synergistic, antagonistic, or additive effect on PAL, LOX, and PPO activity in cotton leaves resulting from the interactive h. armigera herbivory and omethoate treatment. In the interactive effect on the response of PAL activity in cotton leaves, antagonistic effects of the omethoate application towards h. armigera herbivory were observed at 6 and 12 h. Synergistic effects were then observed at 18 and 30 h. Antagonistic effects were observed from 54 to 78 h and synergistic effects were finally observed at 126 h. The correlation between h. armigera herbivory and omethoate application in the interactive effect on cotton defense responses of LOX activity also fluctuated from synergism to antagonism during the time course. In the interactive effect on

关键词： cotton defense helicoverpa armigera herbivory omethoate phenylalanine ammonia-lyase lipoxygenase polyphenol oxidase

Tryptophan-specific peptide modification through metal-free photoinduced N-h alkylation employing N-aryl glycines

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Chinese Chemical Letters 2024年第6期35卷 316-319页

作者： Jianhui yin Wenjing huang Changyong Guo Chao Liu Fei Gao honggang hu School of Medicine or Institute of Translation Medicine Shanghai UniversityShanghai 200444China

Tryptophan(Trp)carries a unique heteroaromatic indole side chain and plays a critical role in peptide or protein ***,we have reported a metal-free photoinduced N-h alkylation strategy using N-aryl glycines for specific modification of tryptophan-containing *** robustness of our approach is demonstrated by its wide substrate scope,excellent isolated yields,as well as almost unobservable side *** this highly efficiently metal-free condition,alkylated Trp-containing peptides can be smoothly *** study provides a reliable and practical tool for the chemo-selective modification of various tryptophan containing oligopeptides.

关键词： Tryptophan Peptide Modification Glycine Photoinduced

ThE TOPOLOGY OF JULIA SETS FOR GEOMETRICALLY FINITE POLYNOMIALS

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Chinese Annals of Mathematics,Series B 1998年第1期19卷 77-80页

作者： yin YONGChENG 浙江大学数学所浙江杭州

By means of the Branner-hubbard puzzle, the author studies the topology of filled-in Julia sets for geometrically finite polynomials,and proves a conjecture of C. McMullen and a conjecture of B. Branner and J. h. hu... 详细信息

关键词： Filled-in Julia set Geometrically finite polynomial Topology

Effective removal of chromium,copper,and nickel heavy metal ions from industrial electroplating wastewater by in situ oxidative adsorption using sodium hypochlorite as oxidant and sodium trititanate nanorod as adsorbent

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Chinese Journal of Chemical Engineering 2024年第10期74卷 312-330页

作者： Muhammad Tayyab Butt hengbo yin Faculty of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China

Sodium hypochlorite and synthesized sodium trititanate nanorods(Na_(2)Ti_(3)O_(7),186 nm×1270 nm)were used as the oxidant and adsorbents for in situ oxidative adsorption treatment of actual electroplating wastewater containing Cr(Ⅵ)(2.6-5.2 mg·L^(-1)),Cu^(2+)(2.7-5.4 mg·L^(-1)),and Ni^(2+)(0.2705-0.541 mg·L^(-1))ions at ph of 8.8-9.1 and 20-60℃.The as-synthesized sodium trititanate nanorods were characterized by XRD,hRTEM,N2 adsorption/desorption,SEM,EDX,and zeta potential *** concentrations of heavy metal ions in wastewater were analyzed by ICP *** in situ oxidative adsorption treatment under the concentrations of 25 g·L^(-1) for sodium hypochlorite and 125 mg·L^(-1) for sodium trititanate nanorods at 60℃ for 5 h,the heavy metal ion concentrations could be reduced from initial value of 2.6 to final value of 1.92 mg·L^(-1) for Cr(Ⅵ),3.6 to 0.17 mg·L^(-1) for Cu^(2+),and from 0.2705 to 0.097 mg·L^(-1) for Ni^(2+),***(Ⅵ),Cu^(2+) and Ni^(2+) ions could be effectively removed by the in situ oxidative adsorption *** in situ oxidative adsorption processes of Cr(Ⅵ),Cu^(2+) and Ni^(2+) ions are satisfactorily simulated by the pseudo-second order adsorption kinetics and Langmuir adsorption isotherm,*** thermodynamics analyses reveal that the oxidative adsorption processes of Cr(Ⅵ),Cu^(2+) and Ni^(2+) ions are spontaneous and *** oxidation degree of metalcontained complexes influences the values of thermodynamics functions.

关键词： heavy metals Oxidative adsorption Electroplating wastewater Sodium trititanate nanorods Nanomaterials Oxidation