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Two New Types of Conserved Quantities Deduced from Noether Symmetry for Nonholonomic Mechanical System

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Communications in Theoretical Physics 2009年第2期51卷 205-208页

作者： ZHANG Xiao-ni fang Jian-Hui PANG Ting LIN Peng College of Physics Science and Technology China University of Petroleum Dongying 257061 China

For a nonholonomic mechanical system, the generalized Mei conserved quantity and the new generalized Hojman conserved quantity deduced from Noether symmetry of the system are studied. The criterion equation of the Noether symmetry for the system is got. The conditions under which the Noether symmetry can lead to the two new conserved quantities are presented and the forms of the conserved quantities are obtained. Finally, an example is given to illustrate the application of the results.

关键词： Noether symmetry conserved quantity nonholonomic mechanical system

Perturbation to Lie Symmetry and Generalized Hojman Adiabatic Invariants for Relativistic Hamilton System

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Communications in Theoretical Physics 2008年第4期49卷 855-858页

作者： ZHANG Xiao-ni fang Jian-Hui LIN Peng PANG Ting College of Physics Science and Technology China University of Petroleum Dongying 257061 China

Based on the concept of higher-order adiabatic invariants of mechanical system with action of a small perturbation, the perturbation to Lie symmetry and generalized Hojman adiabatic invariants for the relativistic Hamilton system are studied. Perturbation to Lie symmetry is discussed under general infinitesimal transformation of groups in which time is variable. The form and the criterion of generalized Hojman adiabatic jnvariants for this system are obtained. Finally, an example is given to illustrate the results.

关键词： relativistic Hamilton system Lie symmetry generalized Hojman adiabatic invariant

Noether-Lie Symmetry of Generalized Classical Mechanical Systems

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Communications in Theoretical Physics 2008年第2期49卷 305-307页

作者： ZHANG Xiao-ni fang Jian-Hui WANG Peng DING ning College of Physics Science and Technology China University of Petroleum Dongying 257061. China

In this paper, the Noether Lie symmetry and conserved quantities of generalized classical mechanical system are studied. The definition and the criterion of the Noether Lie symmetry for the system under the general infinitesimal transformations of groups are given. The Noether conserved quantity and the Hojman conserved quantity deduced from the Noether Lie symmetry are obtained. An example is given to illustrate the application of the results.

关键词： generalized classical mechanical system Noether-Lie symmetry Noether conserved quantity Hojman conserved quantity

A New Type of Conserved Quantity of Mei Symmetry for Relativistic Variable Mass Mechanical System in Phase Space

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Communications in Theoretical Physics 2008年第5期49卷 1145-1147页

作者： ZHANG Xiao-ni fang Jian-Hui LIN Peng PANG Ting College of Physics Science and Technology China University of Petroleum Dongying 257061 China

In this paper, a new type of conserved quantity directly deduced from the Mei symmetry for relativistic variable mass system in phase space is studied. The definition and the criterion of the Mei symmetry for the system are given. The conditions for existence and the form of the new conserved quantity are obtained. Finally, an example is given to illustrate the application of the results.

关键词： relativity variable mass system phase space Mei symmetry new conserved quantity

Phase Equilibrium of Quaternary System Cd^(2+)//Cl^-,SO_4^(2-),NO_3^--H_2O at 298 K

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Chemical Research in Chinese Universities 2011年第3期27卷 482-485页

作者： HUANG Yi ZOU fang ni Shi-jun SANG Shi-hua Department of Geochemistry Chengdu University of Technology Chengdu 610059 P. R. China

Solid-liquid equilibrium of quaternary system Cd2＋//Cl–, SO42–, NO3–-H2O at 298 K was studied by means of an isothermal solution saturation method. Experimental results indicate that there are three univariant curves BE, AE and CE, one invariant point E and three crystallization fields in the quaternary system. The quaternary system belongs to a simple type, and there are no double salts or solid solution existing. The crystallization zones of equilibrium solid phases are CdCl2·5/2H2O（AEB field）, 3CdSO4·8H2O（AEC field） and Cd（NO3）2·4H2O（BEC field）, respectively. The composition of the invariant point is CdCl2, Cd（NO3）2, CdSO4 and H2O and the contents of which are 17.02%, 45.50%, 4.52% and 32.96%, respectively. The physico-chemical properties of solution in the quaternary system show regular changes along with the increased cadmium concentration. The results indicate that Cd（NO3）2 possessed the highest solubility among those three salts, which means a strong transfer of Cd ion and a high pollution risk of soil environment. And the solubility of CdSO4 would be restrained as the salts existing together.

关键词： Cadmium Quaternary system Isothermal method Solid-liquid equilibrium

Bioassay of Estrogenic Activity of Effluent and Influent in a Farm Wastewater Treatment Plant Using an in vitro Recombinant Assay with Yeast Cells

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Biomedical and Environmental Sciences 2008年第5期21卷 381-388页

作者： XIANG-MING LI fang-ni LUO GUI-XIA LIU AND PING-TING ZHU Department of Preventive Medicine Medical College Yangzhou University Yangzhou 225001 Jiangsu China College of Animal Science and Technology Yangzhou University Yangzhou 225009 Jiangsu China

Objective Environmental estrogens at an elevated concentration are known to produce adverse effects on human and animal life. However, the majority of researches have been focused on industrial discharges, while the impact of livestock wastes as a source of endocrine disrupters in aquatic environments has been rarely elucidated. In order to investigate the contribution of environmental estrogens from livestock, the estrogenic activity in water samples from a farm wastewater treatment plant was analyzed by a recombinant yeast screening method. Methods The extracts prepared from 15 selected water samples from the farm wastewater treatment plant, among which 6 samples were from pre-treatment section （influents） and 9 from post-treatment section （effluents）, were analyzed for estrogenic activity by cellar bioassay. Yeast cells transfected with the expression plasmid of human estrogen receptor and the Lac Z reporter plasmid encoding β-galactossidase, were used to measure the estrogen-like compounds in the farm wastewater treatment plant. Results The wastewater samples from influents showed a higher estrogenic potency than the effluent samples showing a low induction of β-galactossidase relative to solvent control condition. By comparison with a standard curve for 17β-estradiol （E2）, estrogenic potency in water samples from the influents was calculated as E2-equivalent and ranged from 0.1 to 150 pM E2-equivalent. The estrogenic potency in water samples from the effluents was significantly lower than that in the influents, and 7 water samples had less detectable limit in the total of 9 samples. Conclusion Yeast bioassay of estrogenic activity in most of the samples from the farm wastewater after disposal by traditional sewage treatment showed negative results.

关键词： Farm wastewater Bioassay Recombinant gene yeast Environmental estrogens

Subsequent Treatment after Transarterial Chemoembolization Failure/Refractoriness: A Review Based on Published Evidence

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Journal of Clinical and Translational Hepatology 2022年第4期10卷 740-747页

作者： Shen Zhang Wan-Sheng Wang Bin-Yan Zhong Cai-fang ni Department of Interventional Radiology The First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina

Transarterial chemoembolization(TACE)is widely applied for the treatment of hepatocellular *** TACE is often required in clinical practice because a satisfactory tumor response may not be achieved with a single ***,repeated TACE procedures can impair liver function and increase treatment-related adverse events,all of which prompted the introduction of the concept of“TACE failure/refractoriness”.Mainly based on evidence from two retrospective studies conducted in Japan,sorafenib is recommended as the first choice for subsequent treatment after TACE failure/*** studies have investigated the outcomes of other subsequent treatments,including locoregional,other molecular targeted,anti-programmed death-1/anti-programed death ligand-1 therapies,and combination therapies after TACE failure/*** this review,we summarize the up-to-date information about the outcomes of several subsequent treatment modalities after TACE failure/refractoriness.

关键词： Transarterial chemoemboization Failure Refractoriness Subsequent treatment

Synthesis, DNA-binding, and Photocleavage of 2,3-Di-2-pyridylquinoxaline-silver(Ⅰ) Complex

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Chemical Research in Chinese Universities 2008年第1期24卷 15-19页

作者： WANG Xiu-li fang Jia-ni BI Yan-feng LIN Hong-yan LIU Guo-cheng Faculty of Chemistry and Chemical Engineering Liaoning Key Laboratry of Applied Chemistry Bohai University Jinzhou 121000 P. R. China

A new dinuclear complex, [Ag（L）（CH3CN）]2（ClO4）2·2H2O（L=2,3-di-2-pyridylquinoxaline）, was prepared and characterized by elemental analyses, IR spectroscopy, and single-crystal X-ray diffraction analyses. The interaction of the complex with calf thymus DNA（CT-DNA） was investigated by absorption, fluorescence spectroscopies, and viscosity measurement. The results suggested that the complex was bound to DNA via an intercalative mode. The intrinsic binding constant value Kb was found to be approximately 1.48×10^3 L·mol^-1. Moreover, the Ag（I） complex could cleave the plasmid pUC19 DNA from the supercoiled Form Ⅰto the nicked FormⅡ under irradiation at 365 nm.

关键词： DNA Ag-Polypyridyl complex Interaction Fluorescence Cleavage

Transarterial chemoembolization failure/refractoriness: A scientific concept or pseudo-proposition

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World Journal of Gastrointestinal Surgery 2022年第6期14卷 528-537页

作者： Shen Zhang Bin-Yan Zhong Lei Zhang Wan-Sheng Wang Cai-fang ni Department of Interventional Radiology The First Affiliated Hospital of Soochow UniversitySuzhou 215006Jiangsu ProvinceChina

Multi-session transarterial chemoembolization(TACE)is usually needed for the treatment of intermediate-stage hepatocellular carcinoma(HCC),but it may not always have a positive influence on prognosis due to high heterogeneity of *** avoid ineffective repeated TACE,the concept of TACE failure/refractoriness has been proposed by several organizations and is being addressed using tyrosine kinase *** concept of TACE failure/refractoriness is controversial due to ambiguous definitions and low evidence-based *** date,only a few studies have examined the rationality concerning the definition of TACE failure/refractoriness,although the concept has been introduced and applied in many TACE-related clinical *** review focuses on some of the issues related to different versions of TACE failure/refractoriness,the rationality of related definitions,and the feasibility of continuing TACE after so-called failure/refractoriness based on published evidence.A suggestion to re-define TAEC failure/refractoriness is also put forward.

关键词： Hepatocellular carcinoma Transarterial chemoembolization Failure Refractoriness