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β-delayed proton decays near the proton drip line

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Science china(Physics,Mechanics & Astronomy) 2005年第3期48卷 257-267页

作者： XU Shuwei 1 , LI Zhankui 1 , XIE Yuanxiang 1 , HUANG Wenxue 1 , SHU Nengchuan 2 , CHEN Yongshou 2 , XU Furong 3 , WANG Kun 4 , PAN Qiangyan 1 , WANG Xudong 1 , YU Yong 1 & XING Yebing 1 1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, china 2. Nuclear Physics department, china Institute of Atomic Energy, Beijing 102413, china 3. department of Technical Physics, Peking University, Beijing 100871, china 4. Shanghai Institute for Nuclear Research, Shanghai 201800, china Institute of Modern Physics Chinese Academy of Sciences Lanzhou China Nuclear Physics department China Institute of Atomic Energy Beijing China department of Technical Physics Peking University Beijing China Shanghai Institute for Nuclear Research Shanghai China

We briefly reviewed the experimental study on a-delayed proton decays near the proton drip line published by our group during the period of 1996―2004, namely the first observation of the a-delayed proton decays of 9 new nuclides in the rare-earth region and the new measurements of a-delayed proton decays of 5 nuclides in the mass ～90 region near the N = Z line with the aid of the “p-?” coincidence in combination with a He-jet tape transport system. In the meantime some important experimental technique details were supplemented. The experimental results, including the half -lives, spins, parities, deformations and production reaction cross sections for the 14 nuclei were summarized and compared with the current nuclear-model predictions, and then the following points were represented. (1) The experimental half-lives for 85Mo and 92Rh as well as the predicted “waiting point” nuclei 89Ru and 93Pd are 5―10 times longer than the theoretical predictions given by M?ller et al. using a macroscopic-microscopic model. It considerably influences the predictions of the abundances of the nuclides produced in the rp-process. (2) The current-model predictions are not consistent with the experimental assignments of the spins and parities for the proton drip-line nuclei 142Ho and 128Pm. However, the nuclear potential energy surface (PES) calculated by using a Woods- Saxon-Strutinsky method reproduced the experimental results. (3) The Alice code overestimated the production reaction cross sections of the studied 9 rare-earth nuclei by one order of magnitude or two, while HIVAP code overestimated them by one order of magnitude approximately.

关键词： proton drip line, β-delayed proton decay, He-jet tape transport system, "p-γ" coincidence, spin, parity, deformation, production reaction cross section.

Early definitive surgery in the management of severe acute pancreatitis

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Hepatobiliary & Pancreatic Diseases International 2003年第4期2卷 496-499页

作者： Wei-Zhong Zhang the department of surgery, Taizhou First People’s Hospital, Taizhou 318020, china department of surgery Taizhou First People's Hospital Taizhou 318020 China. zhangweizhong11@***

OBJECTIVE: To assess the role of early peritoneal lavage and drainage in the management of severe acute pancreatitis. DATA SOURCES: Early peritoneal lavage and drainage was defined as that lavage and drainage should be done in the peritoneal cavity without interference of the pancreas within 72 hours after onset of acute pancreatitis. Biomedical literature database (Medline) from 1981 through 2003 was retrieved and papers about this treatment were analyzed. RESULTS: Nine papers retrieved included 179 patients with severe acute pancreatitis. In 108 patients undergoing closed peritoneal lavage and drainage, 7 died, in 15 patients having laparoscopic procedure, 1 died, and in 56 patients having open procedure 2 died. The total survival rate was 94.4%. CONCLUSIONS: Even if extensive pancreatic necrosis occurs, early peritoneal lavage and drainage is feasible to keep the inflammatory pancreas intact and drain peri-pancreatic region in an attempt to improve the survival rate.

关键词： pancreatitis necrotizing surgery

Combined invagination and duct-to-mucosa techniques with modifications:anew method of pancreaticojejunal anastomosis

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Hepatobiliary & Pancreatic Diseases International 2011年第4期10卷 422-427页

作者： Bin Zhu,Li Geng,You-Gang Ma,Yong-Jie Zhang and Meng-Chao Wu Second department of Biliary surgery and department of Special Treatment,Eastern Hepatobiliary surgery Hospital,Second Military Medical University,Shanghai 200438,china Second department of Biliary surgery Eastern Hepatobiliary Surgery Hospital Second Military Medical University Shanghai 200438 China department of Special Treatment Eastern Hepatobiliary Surgery Hospital Second Military Medical University Shanghai 200438 China

BACKGROUND:Soft pancreatic texture and a small main pancreatic duct are thought to be the most significant risk factors for the occurrence of pancreatic fistula (PF),a common and serious complication after pancreaticoduodenectomy (PD).This is in part due to the technical difficulties of pancreaticojejunostomy (PJ) posed by a soft gland with a normal-sized *** deal with this problem,we developed a new anastomotic technique which combines the two most widely used techniques,namely,the invagination technique and the duct-to-mucosa technique,with a modification of the suture route and insertion of a temporary stent ***:Between January 2003 and December 2009,ninetytwo consecutive patients underwent PD in which the new PJ technique was *** and follow-up data of these patients were reviewed for operative details,early postoperative events,and outcomes at 6 months after the *** was defined by the International Study Group on Pancreatic Fistula (ISGPF) guidelines and graded (A,B or C) according to the clinical procedures and ***:In this group of 92 patients,there was only 1 early death from acute renal *** was observed in 11 patients (12.0%),8 in grade A,1 in grade B,and 2 in grade *** the 2 patients in grade C,PF was surgically *** were no early or late deaths attributable to *** months after the operation,all of the patients were free of PJ-related symptoms except for 2,who were found to have ***:Our modified technique is simple and safe in *** data suggest that this technique produces excellent early and medium-term results.

关键词： pancreaticoduodenectomy pancreaticojejunostomy pancreatic fistula

Pairwise entanglement and local polarization of Heisenberg model

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Science china(Physics,Mechanics & Astronomy) 2008年第10期51卷 1515-1522页

作者： XI XiaoQiang1,2, ZHANG Tao3, YUE RuiHong3,4 & LIU WuMing2 1 department of Applied Mathematics and Physics, Xi’an Institute of Post and Telecommunications, Xi’an 710061, china 2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, china 3 Institute of Modern Physics, Northwest University, Xi’an 710069, china 4 department of Physics, Ningbo University, Ningbo 315211, china department of Applied Mathematics and Physics Xi’an Institute of Post and Telecommunications Xi’an China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing China Institute of Modern Physics Northwest University Xi’an China department of Physics Ningbo University Ningbo China

The characteristics of pairwise entanglement and local polarization (LP) are dis-cussed by studying the ground state (states) of the Heisenberg XX model. The re-sults show that: the ground state (states) is (are) composed of the micro states with the minimal polarization (0 for even qubit and 1/2 for odd qubit); LP and the prob-ability of the micro state have an intimate relation, i.e. the stronger the LP, the smaller the probability, and the same LP corresponds to the same probability; the pairwise entanglement of the ground state is the biggest in all eigenvectors. It is found that the pairwise entanglement is decreased by the state degeneracy and the system size. The concurrence approaches a fixed value of about 0.3412 (for odd-qubit chain) or 0.3491 (for even-qubit chain) if the qubit number is large enough.

关键词： Heisenberg XX model local polarization pairwise entanglement

Geochemical characteristics of pyrolysis gas from epimetamorphic rocks in the northern basement of Songliao Basin,Northeast china

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Science china Earth Sciences 2008年第S1期51卷 140-147页

作者： YANG Chun 1 ,LUO Xia 2 ,LI Jian 2 ,LI ZhiSheng 2 ,LIU QuanYou 3 &Wang YuLin 4 1 department of Earth Sciences,Zhejiang University,Hangzhou 310027,china 2 Research Institute of Petroleum Exploration and Development(Langfang Branch),Langfang 065007,china 3 Research Institute of Petroleum Exploration and Development,Beijing 100083,china 4 department of Source and Environment,Liaoning Technical University,Fuxin 123000,china department of Earth Sciences Zhejiang University Hangzhou China Research Institute of Petroleum Exploration and Development (Langfang Branch) Langfang China Research Institute of Petroleum Exploration and Development Beijing China department of Source and Environment Liaoning Technical University Fuxin China

The Xushen gas field,located in the north of Songliao Basin,is a potential giant gas area for china in the *** proved reserves have exceeded 1000×10 8 m 3 by the end of ***,the origin of natural gases from the deep strata is still in *** rocks as a potential gas source are widely spreading in the northern basement of Songliao *** to pyrolysis experiments for these rocks in the semi-confined system,gas production and geochemistry of alkane gases are discussed in this *** Carboniferous-Permian epimetamorphic rocks were heated from 300℃to 550℃,with temperature interval of 50℃.The gas production was quantified and measured for chemical and carbon isotopic *** show thatδ13C 1 is less than?20‰,carbon isotope trend of alkane gas isδ13C 1 δ13C 3 ,these features suggest that the gas would be coal-type gas at high-over maturity,not be inorganic gas with reversal trend of gaseous alkanes (δ13C 1 >δ13C 2 >δ13C 3 ).These characteristics of carbon isotopes are similar with the natural gas from the basin basement,but disagree with gas from the Xingcheng ***,the mixing gases from the pyrolysis gas with coal-typed gases at high-over maturity or oil-typed gases do not cause the reversal trend of carbon *** gas generation intensity for epimetamorphic rocks is 3.0×10 8 ―23.8×10 8 m 3 /km 2 ,corresponding to Ro from 2.0%to 3.5%for organic matter.

关键词： Northern Songliao Basin epimetamorphic rock pyrolysis experiment gas generation potential carbon isotope

Effect of daidzin,genistin,and glycitin on osteogenic and adipogenic differentiation of bone marrow stromal cells and adipocytic transdifferentiation of osteoblasts

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Acta Pharmacologica Sinica 2005年第9期26卷 1081-1086页

作者： Xiang-hui LI~1 Jin-chao ZHANG~(2,3) Sen-fang SUI~(1,4) Meng-su YANG~(3,4)1 State Key Laboratory of Biomembrane department of Biological Sciences and Biotechnology,Tsinghua University,Beijing 100084,china 2 department of Chemistry College of Chemistry and Environmental Science,Hebei University,Baoding 071002,china 3 department of Biology and Chemistry,City University of Hong Kong,Hong Kong,china department of Biological Sciences and Biotechnology State Key Laboratory of Biomembrane Tsinghua University Beijing China department of Chemistry College of Chemistry and Environmental Science Hebei University Baoding China department of Biology and Chemistry City University of Hong Kong Hong Kong China

Aim:To examine the effect of daidzin,genistin,and glycitin on the osteogenic andadipogenic differentiation of bone marrow stromal cells（MSC）and the adipogenictransdifferentiation of ***:MTT test,alkaline phosphatase（ALP）activity measurement,Oil Red O stain and measurement were ***:Daidzin,genistin,and glycitin 1×10-8,5×10-7,1×10-6,5×10-6,and 1×10-5mol/L all promoted the proliferation of primary mouse bone MSC and *** 5×10-7mol/L and genistin 1×10-6mol/L promoted the osteogenesis *** 1×10-8,5×10-7,1×10-6,5×10-6,and 1×10-5mol/L and glycitin 1×10-8,1×10-6,and 1×10-5mol/L inhibited the adipogenesis of ***,genistin,and glycitin 1×10-8,5×10-7,1×10-6,5×10-6,and 1×10-5mol/L all inhibited the adipocytictransdifferentiation of ***:Daidzin,genistin,and glycitinmay modulate differentiation of MSC to cause a lineage shift toward the osteo-blast and away from the adipocytes,and could inhibit adipocytic transdifferen-tiation of *** could also be helpful in preventing the developmentof osteonecrosis.

关键词： daidzin genistin glycitin bone marrow stro-real cells osteogenic differentiation adipogenic differentiation osteoblasts adipocytic transdifferentiation

ON MATRIX UNITARILY INVARIANT NORM CONDITION NUMBER

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Journal of Computational Mathematics 1998年第2期16卷 121-128页

作者： Dao-sheng Zheng (department of Mathematics, East china Normal University, Shanghai 200062, china) 华东师范大学数学系上海

In this paper, the unitarily invariant norm \\.\\ on C-mxn is used. We first discuss the problem under what case, a rectangular matrix A has minimum condition number K(A) = \\A\\ \\A(+)\\, where A(+) designates the Moore-Penrose inverse of A; and under what condition, a square matrix A has minimum condition number for its eigenproblem? Then we consider the second problem, i.e., optimum of K(A) = \\A\\ \\A(-1)\\(2) in error estimation.

关键词： matrix unitarily invariant norm condition number

Theoretical study on the reaction mechanism of(CH_3)_3CO+CO

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Science china Chemistry 2005年第1期48卷 18-24页

作者： ZHAO Hongmei1,2,3, SUN Chengke1,4, ZHANG Rongchang3, XI Hongmin3 & LI Zonghe1 1. department of Chemistry, Beijing Normal University, Beijing 100875, china 2. The Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, china 3. department of Chemistry, Beihua University, Jilin 132013, china 4. department of Chemistry, Qujing Normal University, Yunnan 655000, china department of Chemistry Beijing Normal University Beijing China The Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of Sciences Beijing China department of Chemistry Beihua University Jilin China department of Chemistry Qujing Normal University Yunnan China

The reaction mechanism of (CH3)3CO with CO has been theoretically investigated using density-functional theory (DFT) calculations at B3LYP/6-31G* level. In order to get more reliable energy values the single-point energy is evaluated at CCSD (T)/6-31++G** level. The results show that the reaction is multi-channel and the reaction of (CH3)3CO radical with CO mostly produces (CH3)3C + CO2. The reaction could play a role in eliminating air pollution.

关键词： DFT, B3LYP, (CH3)3CO, radical.

Totalhipreplacementforcongenitaldislocationofthehipinelderlypatients

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吉林大学学报(医学版) 1994年第1期 41-44页

作者： Duan Desheng Zhang Yuanying,Jiang Hongzhi,Gao Zhongli,Wedge J H(department of orthopaedic surgery, Third Teaching Hospital)

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关键词： hip dislocation congenital/SU aged