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Nuclear Science and Techniques 2016年第1期27卷 63-70页

作者： Ming-Hong Wu jia-Ling Li xiang-Xin He Gang Xu guo-ji Ding Wen-Yan Shi Institute of Applied Radiation School of Environmental and Chemical Engineering Shanghai University

Estrogens as a kind of steroidal sex hormone are widely used in humans, especially quinestrol(QS),dienestrol(DS) and norethindrone(NET, 19-nor-17-alphaethinltestoster-one), which cannot be completely degraded after application. Steroidal estrogens at low concentration pulling into environment can disturb the normal biological function of wide life and thus lead to great threat to humans. So it is important to explore its degradation mechanism and its behavior in the environment. In this study, we investigated the oxidation or reduction system under gamma irradiation for reducing estrogenic activity in the aqueous solutions as well as degradation kinetics, its by-products and yield of transformation by different analytical methods such as GC–MS and HPLC. Gamma irradiation could effectively degrade estrogens in aqueous solution. The degradation reaction of estrogens could be depicted by first-order reaction kinetics. The total organic carbon of solution decreased with an increasing absorbed dose with the order: quinestrol [ norethindrone [ dienestrol. The toxicity of the three estrogens was declined after irradiation. Mono- and quadric-hydroxylated intermediates as well as organic acids were formed after gamma irradiation.

关键词：甾体雌激素还原系统毒性试验水溶液辐射能氧化一级反应动力学 γ射线照射

An investigation of cellular distribution of manganese in hyperaccumlator plant Phytolacca acinosa Roxb. using SRXRF analysis

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Journal of Environmental Sciences 2006年第4期18卷 746-751页

作者： XU xiang-hua SHI ji-yan CHEN Ying-xu XUE Sheng-guo WU Bei HUANG Yu-ying Department of Environmental Engineering Zhejiang University Hangzhou 310029 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100039 China

Phytolacca acinosa Roxb. （P acinosa） is a recently discovered manganese hyperaccumulator plant from southern China. It is a good candidate for phytoremediation of manganese（Mn） polluted soil for its high biomass and fast growth. Knowledge of the tissue localization and identification of heavy metals can provide essential information on metal toxicity and bioaccumulation mechanisms. Synchrotron radiation X-ray fluorescence spectroscopy （SRXRF） microprobe was used in this study to investigate the cellular distributions of Mn and other elements in root, stem, leaf, petiole and midrib of P. acinosa. The highest Mn content was found in the vascular tissues of root, stem, petiole and midrib. Cortex in root played a key role in Mn absorption and Mn was limited in the vascular bundle during the process of transportation in stem. Moreover, Mn content in leaf epidermis was higher than that in mesophyll, which suggested that the sequestration of Mn in leaf epidermis might be one of the detoxification mechanisms of P. acinosa. The significance of other elemental （such as P, S, K, Ca, Fe, Zn and Cu） distribution patterns and the correlation with Mn were also discussed.

关键词： hyperaccumulator Phytolacca acinosa Roxb. manganese element distribution SRXRF

Antibacterial Thermoplastic Polyurethane/PL-DOSS Composite Films

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Chinese Journal of Polymer Science 2021年第8期39卷 1020-1028,I0007页

作者： Xiao Liu jian-Wei guo Ya-Dong Liu Ming Liu Hui Liu Miao-Miao Han Sheng-xiang ji Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Medical devices-related infections pose a great threat to patients and cause an increased morbidity and mortality. Herein, we prepare an antibacterial composite(TPU-x) through blending medical grade thermoplastic polyurethane(TPU) and the complex(PL-DOSS) of ε-polylysine(ε-PL) and docusate sodium(DOSS). >99% reduction of colony forming unit(CFU) can be obtained in TPU-x composite films even at relatively low content of PL-DOSS, e.g. 0.13% for Methicillin resistant S. aureus(MRSA) and 0.5% for E. coli. The excellent antibacterial activity is mainly attributed to the formation of PL-DOSS nanoparticles that are uniformly dispersed in the TPU matrix with a size of ~100 nm. TPU-x composite films exhibit long-term stability in saline and good biocompatibility, and retain mechanical properties of TPU.

关键词： Nosocomial infections Antibacterial composite Solution blending Thermoplastic polyurethane Polylysine

Development of a dynamics model for graphite-moderated channel-type molten salt reactor

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Nuclear Science and Techniques 2019年第1期30卷 145-155页

作者： Long He Cheng-Gang Yu Rui-Min ji Wei guo Ye Dai xiang-Zhou Cai Shanghai Institute of Applied Physics Chinese Academy of Sciences CAS Innovative Academy in TMSR Energy System Chinese Academy of Sciences University of Chinese Academy of Sciences

A molten salt reactor(MSR) is one of the six advanced reactor concepts selected by the generation Ⅳ international forum because of its advantages of inherent safety, and the promising capabilities of Th-U breeding and transuranics transmutation. A dynamics model for the channel-type MSR is developed in this work based on a three-dimensional thermal–hydraulic model(3DTH) and a point reactor model. The 3DTH couples a three-dimensional heat conduction model and a one-dimensional single-phase flow model that can accurately consider the heat conduction between different assemblies. The 3DTH is validated by the RELAP5 code in terms of the temperature and mass flow distribution calculation. A point reactor model considering the drift of delayed neutron precursors is adopted in the dynamics model. To verify the dynamics model, three experiments from the molten salt reactor experiment are simulated. The agreement of the experimental data and simulation results was *** the aid of this model, the unprotected step reactivity addition and unprotected loss of flow of the 2 MWt experimental MSR are modeled, and the reactor power and temperature evolution are analyzed.

关键词： Molten salt reactor Thermal-hydraulics Point reactor model Thermal coupling

Pilot study on bromate reduction in ozonation of water with low carbonate alkalinities by carbon dioxide

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Journal of Environmental Sciences 2011年第9期23卷 1491-1496页

作者： ji Li Li Zou Lulu guo jialin ji Harbin Institute of Technology Shenzhen Graduate School Shenzhen 518055 China

A pilot study was carried out to explore the application of carbon dioxide for pH depression in a bubble column and its ability to inhibit bromate formation for water with a low *** showed that in the absence of ammonia,CO 2 was capable of reducing bromate 38.0%–65.4% with one-unit pH *** 2 caused a slightly lower bromate reduction （4.2%） than did H 2 SO 4 when the pH was depressed to 7.4,and a more a pronounced lower reduction （8.8%） when the pH was depressed to *** the presence of 0.20 mg/L-N ammonia,bromate was largely inhibited with 73.9% *** the pH was depressed to 7.4,CO 2 and H 2 SO 4 showed an 11.3% and 23.5% bromate reduction respectively,demonstrating that the joint use of CO 2 and ammonia might be a plausible strategy of blocking all three bromate formation *** 2 could be applied through the aeration diffuser together with ozone gas,resulting in a similar bromate reduction compared with the premixing method through Venturi mixer.

关键词： ozone bromate carbon dioxide

Tensor Couplings of ω- and ρ-Mesons with Nucleons in a Derivative Scalar Coupling Model for Finite Nuclei

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Chinese Physics Letters 2001年第7期18卷 891-893页

作者： guo Hua HU xiang Department of Technical Physics and MOE Laboratory of Heavy Ion Physics Peking UniversityBeijing 100871

Theω-andρ-meson tensor couplings to nucleons in a derivative scalar coupling model for finite nuclei are *** influences of the tensor couplings on the binding energies per nucleon,the root-mean-square charge radii,spin-orbit splittings and single particle energies are *** obtained results show that the spin-orbit splittings for finite nuclei are more sensitive to theω-meson tensor coupling.

关键词： tensor coupling meson

Highly Stretchable,Compressible,Adhesive,Conductive Self-healing Composite Hydrogels with Sensor Capacity

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Chinese Journal of Polymer Science 2020年第11期38卷 1221-1229,I0007页

作者： ji-Jun Wang Qiang Zhang Xing-xiang ji Li-Bin Liu State Key Laboratory of Biobased Material and Green Papermaking School of Chemistry and Pharmaceutical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

The design and fabrication of conductive hydrogels with high stretchability,compressibility,self-healing properties and good adhesion remains a significant *** have fabricated composite hydrogels by random polymerization of acrylic acid(AA)and dopamine(DA)in the presence of multi-walled carbon nanotubes(MWCNTs).The π-π interaction between DA and MWCNTs makes MWCNTs stably and homogenously dispersed in *** fabricated PAA-PDA/CNT composite hydrogels possess relatively high mechanical strength(maximum Youngzs modulus:800 kPa)and can be stretched to 1280%strain and compressed to 80%*** multiple hydrogen bonding formed between functional groups of PAA-PDA and MWCNTs can effectively dissipate energy and quickly achieve *** composite hydrogels also show good adhesion and can easily adhere to various inorganic or organic *** addition,the hydrogel reveals stable strain sensitivity and can be used as skin sensors.

关键词： Hydrogels Self-healing Conductivity Sensor

Effect of Cu on Surface Microcrack of Austenitic Stainless Cold Rolled Coil

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Journal of Iron and Steel Research International 2014年第S1期21卷 56-60页

作者： ji-xiang PAN guo-yu QIAN guo-guang CHENG Yan LI Wei PAN Zi-bing HOU Chao CHEN jiuquan Iron and Steel Co. State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

In order to find out the cause of surface microcrack on 304 austenitic stainless cold rolled coils which is produced in a steel plant of China, lots of studies have been carried out. The results indicated that the copper guide of steekle mill used in hot rolling process contacts directly with the hot rolled coil, so parts of copper melt and glued to the surface of the stainless steel plates due to a higher temperature of stainless steel plates than the copper melting temperature, which leads to deterioration of austenitic grain boundaries. Shear stress produced in the process of repeatrolling on finishing mill induces the surface microcracks and promotes it. After changing the copper guide to the cast steel one, such kinds of surface microcracks have never appeared.

关键词： steekle mill austenitic stainless steel surface microcrack copper guide

Correction to“A Classification of Spectrum-determined Circulant Digraphs”

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Acta Mathematicae Applicatae Sinica 2021年第4期37卷 867-868页

作者： Zheng-xin QIN Xin-ping XU ji-xiang MENG guo-ping WANG School of mathematics and information technology Jiangsu Second Normal UniversityNanjing210013China College of Mathematics and System Sciences Xinjiang UniversityUrumqi830046China School of Mathematical Sciences Xinjiang Normal UniversityUrumqi830054China

We find an error in the proof of Lemma 4 in[3].This makes that Theorem 2 and Corollary 3 in[3]are also wrong,and the next counterexample shows this.

关键词： proof error Digraph

Bifurcation and chaos of a 4-side fixed rectangular thin plate in electromagnetic and mechanical fields

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 62-71页

作者： Wei-guo ZHU xiang-zhong BAI School of Civil Engineering and Mechanics Yanshan University Qinhuangdao 066004 China Department of Transportation Engineering Huaiyin Institute of Technology Huai 'an 223001 China

We studied the problem of bifurcation and chaos in a 4-side fixed rectangular thin plate in electromagnetic and me-chanical *** on the basic nonlinear electro-magneto-elastic motion equations for a rectangular thin plate and the ex-pressions of electromagnetic forces,the vibration equations are derived for the mechanical loading in a steady transverse magnetic *** the Melnikov function method,the criteria are obtained for chaos motion to exist as demonstrated by the Smale horseshoe *** vibration equations are solved numerically by a fourth-order Runge-Kutta *** bifurcation dia-gram,Lyapunov exponent diagram,displacement wave diagram,phase diagram and Poincare section diagram are obtained.

关键词： Rectangular thin plate Electromagnetic-mechanical coupling Melnikov function method Runge-Kutta method Bifurcation Chaos