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A new method for studying caffeine's antioxygenic property: Peroxidase-Oxidase biochemical reaction

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Science Bulletin 2003年第16期48卷 1728-1732页

作者： WANG Jun, cai ruxiu, LIN Zhixin & LIU Zhihong Department of Chemistry, Wuhan University, Wuhan 430072, China Correspondence should be addressed to cai ruxiu (e-mail: dlxfxc@ ***) Department of Chemistry Wuhan University Wuhan China

The effect of Caffeine on Peroxidase-Oxidase (PO) reaction was studied systematically in this paper. We proved that the valley of PO oscillation is the best phase an-gle which was used to research antioxygenic property by the Analyte Pulse Perturbation Technique (APP), based on in-vestigating the mechanism. Area integral calculus was pro-posed to use in quantitative analysis for the first time. There is a good linear relationship (R = 0.9950) between the ratio of amplitude changes of PO oscillation and the concentration of caffeine in the range 4.61×10-7 mol/L—1.84×10-5 mol/L. A new method for analysis by PO oscillation was set up. We also investigated two-dimensional projections and Fourier spectrum of nonlinear complicate system——PO reaction which was perturbed by caffeine, in order to provide a theo-retical basis for studying effects of kinds of antioxidants on life system.

关键词： PO reaction HRP caffeine oscillation.

Cell Toxicity Effect of Cadmium on Yeast Cells by Detecting NADH Autofluorescence

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Wuhan University Journal of Natural Sciences 2007年第2期12卷 333-336页

作者： LIANG Ju cai ruxiu WU Wenlan LIU Zhihong College of Chemical Engineering and Pharmaceutics Henan University of Science and Technology Luoyang 471003 Henan China College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 Hubei China College of Life Sciences Wuhan University Wuhan 430072 Hubei China

The cytotoxic effect of cadmium is studied by detecting intracellular nicotinamide adenine dinucleotidea（NADH） autofluorescence in this work. NADH autofluorescence in processes of cadmium-induced apoptosis, necrosis and reversible injury are recorded timely. The relativity between time course of NADH autofluorescence and cadmium toxicity is established. The cell toxicity effect of Cadmium on yeast cells is studied by detecting the time courses of intracellular reduced NADH autofluorescence in this work. The relativity between time courses of NADH autofluorescence and Cadmium toxicity is established.

关键词： Cadmium reduced nicotinamide adenine dinucleo-tidea (NADH) cell toxicity yeast cells

Simultaneous Determination of Samarium and Gadolinium by a Automated Stopped-flow Analyzer

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Chemical Research in Chinese Universities 1991年第2期7卷 79-83页

作者： Yang Yi, cai ruxiu and Zeng Yun’ e (Department of Chemistry, Wuhan University, Wuhan)

The present paper contains the reaction mechanism of the rare earth complex with 2-(2-arsenophenylazo)-7-(2, 6-dichloro-4-fluoro-phenylazo)- 1, 8-dihydroxynaphthalene-3, 6-disulfonic acid (DCF-arsenazo) studied preliminarily with a fully automated stopped-flow analyzer. A method with a high sensitivity and selectivity is proposed for the simultaneous determination of samarium and gadolinium based on the differential kinetic reaction of the rare earth complex with DCF-arsenazo. Sm and Gd in their concentrated oxides were determined with the relative errors less than 6%.

关键词： Kinetic Samarium Gadolinium Stopped-flow

血红蛋白作为过氧化物模拟酶催化显色体系的研究与应用

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分析化学 2001年第4期29卷 378-382页

作者：黄应平蔡汝秀武汉大学化学系!武汉430072 三峡大学化学系!宜昌443000

研究了以血红蛋白（Ｈｅｍｏｇｌｏｂｉｎ，Ｈｂ）作为过氧化物模拟酶对过氧化氢－４－氨基安替比林（４－Ａｍｉｎｏａｎｔｉｐｙｒｉｎｅ，４－ＡＡＰ）氯取代苯酚衍生物显色体系的催化反应性能，探讨了不同氯取代苯酚类衍生物作为酶... 详细信息

研究了以血红蛋白（Ｈｅｍｏｇｌｏｂｉｎ，Ｈｂ）作为过氧化物模拟酶对过氧化氢－４－氨基安替比林（４－Ａｍｉｎｏａｎｔｉｐｙｒｉｎｅ，４－ＡＡＰ）氯取代苯酚衍生物显色体系的催化反应性能，探讨了不同氯取代苯酚类衍生物作为酶催化反应氢供体底物的构效关系及酶催化反应的可能机理。拟定了Ｈｂ催化Ｈ２Ｏ２氧化４－ＡＡＰ－２，３，个三氯苯酚（２，３，４－Ｔｒｉｃｈｌｏｒｏｐｈｅｎｏｌ，ＴＣＰ）显色体系用于Ｈ２Ｏ２的测定方法。该方法测定Ｈ２Ｏ２灵敏度高，表观摩尔吸光系数为２．２１×１０４Ｌ·ｍｏｌ－１·ｃｍ－１。将拟定方法与葡萄糖氧化酶催化反应偶联，用于人血清样品中葡萄糖含量的测定，得到满意的结果。

关键词：血红蛋白过氧化氢葡萄糖分光光度法

Shor's algorithm does not factor large integers in the presence of noise

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Science China(Information Sciences) 2024年第7期67卷 305-320页

作者： Jin-Yi cai College of Letters and Science University of Wisconsin

We consider Shor's quantum factoring algorithm in the setting of noisy quantum gates. Under a generic model of random noise for(controlled) rotation gates, we prove that the algorithm does not factor integers of the form pq when the noise exceeds a vanishingly small level in terms of n—the number of bits of the integer to be factored, where p and q are from a well-defined set of primes of positive density. We further prove that with probability 1-o(1) over random prime pairs(p, q), Shor's factoring algorithm does not factor numbers of the form pq, with the same level of random noise present.

关键词： random noise Shor's algorithm rotation gates quantum computing prime factorization

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Whittle’s Index Based Sensor Scheduling for Multiprocess Systems Under DoS Attacks

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Journal of Systems Science & Complexity 2024年第1期37卷 329-350页

作者： cai Zai DING Kemi Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and TechnologyShenzhen 518055China.

In this paper,the authors consider how to design defensive countermeasures against DoS attacks for remote state estimation of multiprocess *** each system,a sensor will measure its state and transmits the data packets through an unreliable channel which is vulnerable to be jammed by an *** limited communication bandwidth,only a subset of sensors are allowed for data transmission,and how to select the optimal one to maximize the accuracy of remote state estimation is the focus of the proposed *** authors first formulate this problem as a Markov decision process and investigate the existence of optimal ***,the authors demonstrate the piecewise monotonicity structure of optimal *** the difficulty of obtaining an optimal policy of large-scale problems,the authors develop a suboptimal heuristic policy based on the aforementioned policy structure and Whittle’s ***,a closed form of the indices is derived in order to reduce implementation complexity of proposed scheduling policy and numerical examples are provided to illustrate the proposed developed results.

关键词： DoS attacks Kalman filter remote state estimation Whittle’s index.

Polarized imaging dynamic light scattering for simultaneous measurement of nanoparticle size and morphology

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Particuology 2024年第2期85卷 213-223页

作者： Bingyao Wang Tianyi cai Xiaoshu cai Wu Zhou Zeqi Liu Schoolof Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai200093China Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering Shanghai200093China Jiaxing MeaParTech Instrument Technology Co. LtdZhejiang314000China

The performance of nanoparticles is often affected by particle size and ***,electron microscopy or atomic force microscopy is typically utilized to determine the size and morphology of ***,there are issues such as difficult sample preparation,long processing times,and challenges in quantitative ***,it is of great significance to develop a fast,accu-rate,and statistical method to measure the size and morphology of *** this study,a new method,called polarized imaging dynamic light scattering(PIDLS),is *** nanoparticles are irradiated with a vertical linearly polarized laser beam,and a polarization camera collected the dynamic light scattering images of particles at four different polarization directions(0°,45°,90°,and 135°)at a scattering angle of 90°.The average particle size and distribution are obtained using the imaging dy-namic light scattering method at 0°polarization direction,and the morphology of the particles is ob-tained based on the depolarization patterns of the scattered *** optical sphericityΦis defined based on the degree of linear polarization(DoLP).It is also implemented for the quantitative evaluation of the sphericity of the nanoparticles,including spherical,octahedral,nanoplate,nanorod,and linear *** with the Poincarésphere parameterψ,the morphology of the nanoparticles can be roughly *** addition,PIDLS enables the measurement of particle size and morphology distributions simultaneously for evaluating the uniformity of *** effectiveness of PIDLS is verified by the measurement of five kinds of industrial titanium dioxide as well.

关键词： Imaging dynamic light scattering Polarized light scattering Non-spherical nanoparticles Morphology Online measurement

The　Disociation　of　Nickel-Oxine　in　Surfactant　Miceles

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Wuhan University Journal of Natural Sciences 1997年第1期2卷 87-89页

作者： cai ruxiu Jiang Jiang Huang Houping Zhang Ke

The dissociation kinetics of Ni complex (NiL 2) of Oxine (HL) by H + was investigated in neutral(Brij 35), cationic(CTAN), and anionic(SDS) *** kinetic results have been interpreted by using the distribution model. T... 详细信息

关键词： dissociation distribution constants nickel oxine

An ultra-porous g-C_(3)N_(4) micro-tube coupled with MXene(Ti_(3)C_(2)TX)nanosheets for efficient degradation of organics under natural sunlight

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Journal of Environmental Sciences 2024年第3期137卷 258-270页

作者： Zongyang Ya Qiyou Wang Jingjin cai Peng Wang Xinyu Jiang Zhiyin cai Shanglin Xiang Tingwei Wang Dongyu cai College of Materials Science&Engineering Nanjing Tech University30 South PuZhu RoadNanjing 211816China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University30 South PuZhu RoadNanjing 211816China

It remains as a challenge for realizing efficient photo-responsive catalysts towards largescale degradation of organic pollutants under natural *** work reports a new pore engineering strategy for creating ultra-porous g-C_(3)N_(4) micro-tubes with an unprecedentedly high specific surface area of 152.96 m^(2)/*** is mainly associated with releasing internal vapor pressure in the autoclave where the hydrothermal treatment of the urea/melamine mixture is *** by microscopic observation,porosity measurement and spectroscopic characterization,it is found that releasing the pressure at halfway of hydrothermal process is vital for forming exfoliated rod-like precursors and the de-aggregation of these rods presents substantial benefits on the production of mesopores on g-C_(3)N_(4) microtubes during the calcination of *** offers a large number of reactive sites required by photocatalytic *** these micro-tubes with Ti_(3)C_(2)T_(X) nanosheets via electrostatic interaction yields a 1D/2D heterojunction with a close interfacial *** addition of metallically conductive Ti_(3)C_(2)T_(X) nanosheets accelerates the separation between electrons and holes,and also enhances the light *** these merits of structural design lead to forming a group of highly efficient catalysts demonstrating an excellent photocatalytic degradation rate of k=0.0560 min^(-1)for RhB dyes under 100 mW/cm~2 visible light radiation that micks sunlight *** laboratory valuation is further supported by an outdoor test that shows a fast degradation rate of 0.0744 min^(-1)under natural sunlight.

关键词： Carbon nitride MXene Heterojunction Photocatalysis