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Feature of Motion Around D-stars

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Chinese Physics Letters 1998年第1期15卷 3-4页

作者： li Jia-mu li xin-zhou Department of Physics East China University of Science and TechnologyShanghai 200237 East China Institute for Theoretical Physics Shanghai 200237

The motion of test particles around D-stars is investigated by Hamilton-Jacobi method. There may exist bound orbits under certain conditions. The trajector with periastrons at large r are Keplerian in form, except for the periastron shift. The trajectory with periastrons at small r, differ markedly from Keplerian orbits. The radius of the most tightly bound is found.

关键词： conditions stars method

Casimir Energies on a Twisted Two-Torus

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Chinese Physics Letters 2001年第9期18卷 1163-1166页

作者： CHENG Hong-Bo li xin-zhou Department of Physics Shanghai Teachers UniversityShanghai 2002342 Institute for Theoretical Physics East China University of Science and TechnologyShanghai 200237

We consider a twisted massless multiplet on a two-torus, one side with a normal boundary and the other with a twisted boundary. The Casimir energy is calculated and regularized by means of the Epstein-Hurwitz-type zeta-function introduced by Elizalde. The resulting dimensions of spacetime for the twisted case may be *** results are compared with those of the untwisted case. Since twisted Casimir energy is lower than untwisted energy, the untwisted case may change into the twisted state in the spacetime.

关键词： twisted Casimir integers

Quasi-Normal Oscillations of a Black Hole with Deficit Angle for Electromagnetic Perturbations

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Chinese Physics Letters 2001年第4期18卷 482-484页

作者： li xin-zhou zhou Bing-Lu ZHU Jiong-Ming Department of Physics Shanghai Normal UniversityShanghai 200234

We consider an electromagnetic perturbation in the external space-time of a black hole with deficit angle,and describe the perturbation *** analytic formulas for the quasi-normal frequencies have been provided,which may play a significant role in the continuing search for gravitational radiation and black *** frequencies can be distinguished from the ordinary quasi-normal frequencies of Schwarzschild black hole.

关键词： equation. perturbation quasi

Complex Normal-mode Frequencies of External Perturbations in Generalized Schwarzschild Geometry

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Chinese Physics Letters 2000年第4期17卷 246-248页

作者： YUAN Ning-Yi li xin-zhou Department of Physics Shanghai Teachers UniversityShanghai 200234 East China Institute for Theoretical Physics Shanghai 200237

A moditied Wentzel-Kramers-Brillouin approach is used to determine the complex normal-mode frequencies of external perturbations in generalized Schwarzschild geometry. In the λ= 1 case (Schwarzschild geometry), the agreement with other methods is excellent for the low-lying modes. On the contrary, the λ ≠ 1 case of this geometry is unstable against external perturbations.

关键词： geometry perturbations Brillouin

Hydrolysis of New Transplatin Analogue Containing One Aliphatic and One Planar Heterocyclic Amine ligand： A Density Functional Theory Study

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Chinese Journal of Chemical Physics 2008年第4期21卷 346-352页

作者： Yan Gao li-xin zhou Department of Chemistry Jinan University Guangzhou 510532 China

Herein we give a theoretical study of the hydrolysis processes of a novel anticancer drug trans-[PtCl2（3-pico）（ipa）] （3-pico=3-methylpyridine, ipa=isopropylamine）. Two different models, model 1 relative to isolated reactant/product （R/P, wherein R=platinum complex＋H2O, P=platinum complex＋Cl^-） and model 2 relative to reactant complex/product complex （RC/PC, wherein RC=（platinum complex）（H2O）, PC=（platinum complex）（CI^-） are employed and the geometric structures are optimized at the B3LYP level of DFT method. It is found that the processes of the reactions follow the established theory for ligand substitution in square planar complexes; the geometries of the transition states （TS） agree with the previous related work and all of the reactions are endothermic. The effects originating from the inclusion of the attacking water/released chloride into the second coordination shell of platinum in RC/PC play an important role in the thermodynamic and kinetic profiles of the reactions, that is, the barrier heights of the reactions of model 2 are increased by -26.3 and -23.8 kJ/mol for step1 and step2 respectively, and the endothermicity is considerably decreased by -420.5 and -771.2 kJ/mol compared to model 1 in the gas phase. The consideration of the bulk solvation effects increase the barrier heights for both steps of model 1 by -27.6 and -6.7 kJ/mol respectively, whereas it reduces the barrier heights by -7.9 and -29.3 kJ/mol for model 2. The reaction energies are all decreased, especially for model i, indicating more stable complexes solvated in the bulk aqueous solution than in the gas phase. Additionally, to get an accurate energy picture of the title complex, the relative free energies derived from the DFT-SCRF （density functional theory self-consistent field） calculations are compared with the relative total energies. The results are that activation energies rise for the first hydrolysis and fall for the second hydrolysis for all the systems, and for all the systems,

关键词： Trans platinum anticancer drug Density functional theory Hydrolysis Aliphatic amine ligand Heterocyclic amine ligand

Cosmological Dynamics of de Sitter Gravity

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Chinese Physics Letters 2011年第4期28卷 36-39页

作者： AO Xi-Chen li xin-zhou XI Ping Shanghai United Center for Astrophysics(SUCA) Shanghai Normal University100 Guilin RoadShanghai 200234

A new cosmological model based on the de Sitter gravity is investigated by dynamical analysis and numerical *** some transformations,the evolution equations of this model can form an autonomous system with 8 physical critical *** these critical points there exist one positive attractor and one negative *** positive attractor describes the asymptotic behavior of late-time universe,which indicates that the universe will enter the exponential expansion phase,*** numerical calculations are also carried out,which convince us of this conclusion derived from the dynamical analysis.

关键词： attractor dynamical Sitter

Ovarian growing teratoma syndrome with multiple metastases in the abdominal cavity and liver:A case report

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World Journal of Clinical Cases 2022年第14期10卷 4704-4708页

作者： Xu Hu Zhong Jia li-xin zhou Nisile Kakongoma The Fourth Clinical Medical College Zhejiang Chinese Medical UniversityHangzhou 310011Zhejiang ProvinceChina Department of Hepatobiliary Surgery The First People's HospitalZhejiang University School of MedicineHangzhou 310006Zhejiang ProvinceChina Hangzhou Women’s Hospital Zhejiang Chinese Medical UniversityHangzhou 310008Zhejiang ProvinceChina

BACKGROUND Growing teratoma syndrome(GTS)is an unusual presentation of an amazing transformation of teratoma from malignant to benign on pathology during or after systemic or intraperitoneal *** definitive pathogenesis is still not fully understood due to the lack of large-sample *** SUMMARY A 53-year-old woman underwent radical surgery and postoperative intraperitoneal chemotherapy due to immature teratoma of the right ovary at the age of *** remained well during a 25-year follow-up period after *** asymptomatic solid masses were found in the liver on ultrasonography a month *** computed tomography(CT)of the abdomen revealed multiple masses in the abdominal *** largest one was located in the posterior peritoneum next to the sixth segment of the right liver,about 7.9 cm×7.5 cm in *** masses were present inside the liver,and one mass was in the right pelvic *** lumps in the abdominal cavity were completely removed by *** the operation,multiple space-occupying lesions were seen,ranging in size from 0.5 to 3 cm,and grayish white in color and hard in *** GTS was finally diagnosed based on postoperative *** surgery,she recovered *** a 3-year follow-up,the patient remained free of the disease without any recurrence on CT *** GTS is a rare phenomenon characterized by conversion of immature teratoma to mature one during or after chemotherapy and presents as growing and metastasizing *** pathogenesis of GTS is unclear,and the prognosis is good after surgical resection.

关键词： Hepatic mass Hypothesis of tumoral competitive inhibition and dormancy Ovarian growing teratoma syndrome Treatment Case report

Fabry Disease with Aseptic Meningitis:A Case Series and literature Review of an Underestimated Clinical Presentation

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Current Medical Science 2022年第2期42卷 274-279页

作者： Ming-yu TANG Yue-hui HONG li-xin zhou Jun NI Department of Neurology State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100005China

Objective Fabry disease(FD)is an X-linked lysosomal storage disease caused by the mutation in theα-galactosidase A gene that leads to a consequently decreasedα-galactosidase A enzyme activity and a series of clinical ***,FD accompanied with aseptic meningitis can be relatively scarce and rarely reported,which leads to significant clinical misdiagnosis of this *** Sixteen patients diagnosed with FD based on a decreased activity ofα-galactosidase A enzyme and/or genetic screening were identified through a 6-year retrospective chart review of a tertiary *** presentations,brain magnetic resonance imaging,cerebrospinal fluid analysis,treatment and outcome data were analyzed in cases of aseptic meningitis associated with *** Three out of 16 cases exhibited aseptic meningitis associated with *** was one female and two male patients with a mean age of 33.3 years.A family history of renal failure or hypertrophic cardiomyopathy was found in 3 *** cases presented with a persistent or intermittent headache and recurrent ischemic *** cerebrospinal fluid analyses showed mild pleocytosis in 2 patients and an elevated level of protein in all *** fluid cytology revealed activated lymphocytes,suggesting the existence of aseptic *** the literature review,up to 9 cases presenting with FD and aseptic meningitis were found,which bore a resemblance to our patients in demographic and clinical *** Our cases suggested that aseptic meningitis in FD might be under-detected and easily misdiagnosed,and should be more thoroughly examined in further cases.

关键词： Fabry disease aseptic meningitis ischemic stroke headache case series

Value of c-Met for Predicting Progression of Precancerous Gastric Lesions in Rural Chinese Population

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Chinese Journal of Cancer Research 2012年第1期24卷 18-22页

作者： YU Sun Meng-meng Tian li-xin zhou Wei-cheng You Ji-you li Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of PathologyPeking University School of OncologyBeijing Cancer Hospital&InstituteBeijing 100142China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of EpidemiologyPeking University School of OncologyBeijing Cancer Hospital&InstituteBeijing 100142China

Objective： To investigate the value of c-Met in predicting progression of precancerous gastric lesions. Methods： A population-based study was conducted to detect the overexpression of c-Met by immunohisto- chemical analysis in 124 subjects with precancerous gastric lesions. Odds ratio （OR） and 95% confidence interval （95% CI） were calculated for the association of c-Met overexpression with the risk of advanced gastric lesions. Results： The positive rates of c-Met were 55.7% in intestinal metaplasia （IM） and 64.8% in dysplasia （DYS）, respectively. Stratified analysis indicated that the proportion of c-Met overexpression was 71.4% for IM progressive group, significantly higher than that for IM persistent group （40.0%, P〈O.05）. Compared to the IM persistent group, unconditional logistic regression showed that OR of c-Met overexpression for the IM progressive group was 7.426 （95% Cl： 2.084-26.398）. Conclusion： c-Met plays an important role in gastric carcinogenesis. Detection of c-Met is of value in predicting progression of precancerous gastric lesions from IM to DYS.

关键词： c-Met Intestinal metaplasia, Dysplasia Follow-up