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Gasless laparoscopy for benign gynecological diseases using an abdominal wall-lifting system

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第11期10卷 805-812页

作者： Yue wang Heng CUI yan zhao Zhi-qi wang Department of Obstetrics and Gynecology Peking University People's Hospital Beijing 100044 China

Objectives: The use of gasless laparoscopy with an abdominal wall-lifting device for benign gynecological diseases was compared to conventional laparoscopy with CO2 pneumoperitoneum. Methods: From February 2007 to July 2007,76 women with uterine and/or adnexal benign diseases and candidates for laparoscopic surgery were recruited in this study. Thirty-two women underwent gasless laparoscopic surgery and 44 women underwent pneumoperitoneum laparoscopic surgery. Results: Diverse pathologies,including adnexal cyst,uterine myoma and ectopic pregnancy,were treated successfully with gasless laparoscopic surgery. Compared with the patients in the pneumoperitoneum group,the similar hospital stay (P=0.353) and intraoperative blood loss (P=0.157) were observed. However,the mean operative time in the gasless group was significantly longer than that in the pneumoperitoneum group (P=0.003). No severe intraoperative or postoperative complications were found in either group,except for one case of laparotomic conversion in the pneumoperitoneum group due to dense pelvic adhesions. The total hospital charges were significantly less in the gasless group than in the pneumoperitoneum group (P=0.001). In 38 cases of ovarian cyst resection,the mean operative time in the gasless group remained longer than that in the pneumoperitoneum group (P=0.017). The total hospital charges were also significantly less in the gasless group than in the pneumoperitoneum group (P<0.001). Conclusion: Our preliminary results demonstrated that the laparoscopic procedure using the gasless technique was a safe,effective method to treat benign gynecological diseases. Moreover,it was easy to master. As a minimally invasive treatment,gasless laparoscopic surgery provides a good choice to patients in the undeveloped regions in China without increasing the patients’ and the government’s burden significantly.

关键词： Gasless laparoscopy Pneumoperitoneum laparoscopy Ovarian cyst resection

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Precipitation of AlN and MnS in Low Carbon Aluminium-Killed Steel

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Journal of Iron and Steel Research International 2012年第4期19卷 51-56页

作者： CHEN Yin-li wang yan zhao Ai-min (Engineering Research Institute University of Science and Technology Beijing Beijing 100083 China)

The precipitation kinetics of AlN and MnS in low carbon aluminium-killed steel was *** electron microscopy（TEM）,energy disperse spectroscopy（EDS） and phase analyses have been used to investigate the morphology,compositions and particle size distribution of AlN and MnS precipitates in three positions of the *** particles of AlN and MnS precipitates in the ferrite region after coiling and distributes along and adjacent to the ferrite grain *** shapes of AlN are plate-like,the precipitates size is about 10 to 60 nm;the shapes of MnS are spherical,the precipitates size is about 200 to 600 *** precipitation behavior of AlN is sensitive to the isothermal temperature and holding time,the precipitation quantity and particle size distribution of AlN in different positions of coil are unequal

关键词： precipitation kinetics morphology low carbon steel AIN MnS

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Stepwise superposition approximation approach for analytical solutions with non-zero initial concentration using existing solutions of zero initial concentration in contaminate transport

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Journal of Environmental Sciences 2011年第6期23卷 923-930页

作者： Hongtao wang Rong Han yan zhao Wenjing Lu Yaxin Zhang Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

Analytical solutions for contaminant transport are widely used for both theoretical and practical ***,many existing solutions are obtained subject to an initial condition of zero concentration,which is often unrealistic in many practical *** article proposed a stepwise superposition approximation approach to solve the non-zero initial concentration problem for first-type and third-type boundary conditions by using the existing zero initial concentration *** examples showed that the approach was highly efficient if a proper superposition scheme with relative concentration increments was *** key parameter that controlled the convergence speed was the time increment（△t） multiplied by the rate constant（λ）.The approach served also as an alternative way to make a convenient concentration calculation even if the non-zero initial concentration solution of a problem was known.

关键词： analytical solution contaminate transport non-zero initial concentration superposition approximation relative concentration increment

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Numerical simulation of 3D-microstructures in solidification processes based on the CAFE method

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International Journal of Minerals,Metallurgy and Materials 2009年第6期16卷 640-645页

作者： Jin-long wang Fu-ming wang yan-yu zhao Jiong-ming Zhang Wei Ren School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

It was analyzed that the finite element-cellular automaton （CAFE） method was used to simulate 3D-microstructures in solidification processes. Based on this method, the 3D-microstructure of 9SMn28 free-cutting steel was simulated in solidification processes and the simulation results are consistent with the experimental ones. In addition, the effects of Gaussian distribution parameters were also studied. The simulation results show that the higher the mean undercooling, the larger the columnar dendrite zones, and the larger the maximum nucleation density, the smaller the size of grains. The larger the standard deviation, the less the number of minimum grains is. However, the uniformity degree decreases first, and then increases gradually.

关键词： finite element-cellular automaton model numerical simulation solidification 3D-microstructure Gaussian distribution parameters

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Effect of interrupted endogenous BMP/Smad signaling on growth and steroidogenesis of porcine granulosa cells

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第9期11卷 719-727页

作者： Wei wang Li wang Xin-xiu LI Xia CHEN Hai-yan ZHANG Yu HE Jing-jing wang Yong-yan zhao Bao-le ZHANG Yin-xue XU College of Animal Science and Technology Nanjing Agricultural University Nanjing 210095 China

Bone morphogenetic proteins(BMPs) play a critical role in the growth and steroidogenesis of granulosa cells(GCs).BMP signals act through membrane-bound heteromeric serine/threonine kinase *** ligand binding,BMPs activate intracellular Smad proteins and regulate growth and apoptosis in various cell *** objective of this study was to demonstrate the effects of BMP/Smad signal on growth and steroidogenesis of porcine GCs.A strategy of RNA interference(RNAi)-mediated 'gene silencing' of Smad4,a core molecule mediating the intracellular BMP/Smad signal transduction pathways,was used to interrupt endogenous BMP/Smad *** indicate that Smad4-small interfering RNA(siRNA) caused specific inhibition of Smad4 mRNA and protein expression after *** endogenous BMP/Smad signaling significantly inhibited growth,and induced apoptosis of porcine GCs,while decreasing estradiol *** addition,interrupted BMP/Smad signaling significantly(P<0.05) changed the expression of Cyclin D2,CDK4,Bcl-2,and *** findings provide new insights into how BMP/Smad signaling regulates the growth and steroidogenesis of porcine GCs.

关键词： Porcine granulosa cells Bone morphogenetic protein(BMP)/Smad Smad4 RNA interference(RNAi) Growth Steroidogenesis

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A new free recoverable and reusable mono-alkaloid-type ligand and its use in preparation of ethyl(2R,3S)-2,3-dihydroxy-3-phenylpropionate

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Chinese Chemical Letters 2009年第7期20卷 763-766页

作者： Qiao Feng wang Hui Chen yan zhao Xiao Ye Li Sheng Yong Zhang Research Center of Chirotechnology Fourth Military Medical University Xi'an 710032 PR China

A new free recoverable and reusable mono-alkaloid-type ligand has been synthesized by a simple method. With highly polar groups, the ligand can be recycled and reused eight times to prepare ethyl （2R,3S）-2,3-dihydroxy-3-phenylpropionate with high yield and ee via asymmetric dihydroxylation （AD） reaction. C 2009 Sheng Yong Zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Cinchona alkaloid Recoverable and reusable ligand Ethyl (2R,3S)-2,3-dihydroxy-3-phenylpropionate

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Gound State Properties of Nuclei in ^(295)118 α-Decay Chain

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Communications in Theoretical Physics 2009年第12期52卷 1055-1061页

作者： DONG Jian-Min ZHANG Hong-Fei ZUO Wei wang yan-zhao LI Jun-Qing School of Nuclear Science and Technology Lanzhou University Lanzhou 730000 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China

The properties of nuclei belonging to the α-decay chain of superheavy element ^295118 have been studied in the framework of axially deformed relativistic mean field （RMF） theory with the parameter set of NL-Z2 in the blocked BCS approximation. Some ground state properties such as binding energies, deformations, and α-decay energies Qα have been obtained and agree well with those from finite-range droplet model （FRDM）. The single-particle spectra of nuclei in ^295118 α-decay chain show that the shell gaps present obviously nucleon number dependence. The root-mean-square （rms） radii of proton, neutron and matter distributions change slowly from ^283112 to ^295118 but dramatically from ^279110 to ^283112, which may be due to the subshell closure at Z = 110 in ^279110. The α-decay half-lives in 295118 decay chain are evaluated by employing the cluster model and the generalized liquid drop model （GLDM）, and the overall agreement is found when they are compared with the known experimental data. The α-decay lifetimes obtained from the cluster model are slightly larger than those of GLDM ones. Finally, we predict the α-decay half-lives of Z=118, 116, 114, 112 isotopes using the cluster model and GLDM, which also indicate these two models can corroborate each other in studies on superheavy nuclei. The results from GLDM are always lower than those obtained from the cluster model.

关键词： superheavy nuclei relativistic mean field half-lives cluster model generalized liquid drop model

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Alkaloid Accumulation in Catharanthus roseus Increases with Addition of Seawater Salts to the Nutrient Solution

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Pedosphere 2010年第6期20卷 718-724页

作者： wang Jing-yan and LIU zhao-Pu College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095 (China) [a] College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 (China)

A sand culture experiment was conducted to determine the effects of different seawater (5% and 10%) treatments on plant growth,inorganic ions,indole alkaloid concentrations and yields of Catharanthus roseus,in an effort to increase the alkaloid yield by artificial *** total fresh and dry weights and tissue K + concentrations decreased,but Na + concentrations increased in the plant roots,stems and leaves of *** under seawater stress as compared to the *** concentrations and yields of vindoline,catharanthine,vinblastine and vincristine increased under seawater *** concentrations and yields of these alkaloids were higher in 5% seawater-treated plants than those in the 10% seawater-treated *** the industrial production,5% seawater treatments could reduce the cost of producing *** the control plants,the highest alkaloid concentrations reached a peak at 100 days after planting,suggesting that plant harvest must be optimized in terms of growth duration.

关键词： indole alkaloid inorganic ions plant growth seawater irrigation seawater stress

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Tensor Effect on Bubble Nuclei

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Chinese Physics Letters 2011年第10期28卷 62-65页

作者： wang yan-zhao GU Jian-Zhong ZHANG Xi-Zhen DONG Jian-Min China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413 Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of LanzhouLanzhou 730000 School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000

In the framework of the Hartree–Fock–Bogoliubov(HFB)approach with Skyrme interactions SLy5+T,SLy5+Tw and several sets of TIJ parametrizations,*** Skyrme interaction parametrizations including the tensor terms,the proton density distribution in ^(34)Si and ^(46)Ar nuclei is calculated with and without the tensor *** is shown that the bubble effect in ^(34)Si does not depend a great deal on the Skyrme parametrization and the proton density distribution in ^(34)Si is hardly influenced by the tensor *** to ^(46)Ar,the SLy5+Tw parametrization favors the formation of the bubble structure due to the inversion between the 2s_(1/2) and 1d_(3/2) orbits(2s_(1/2)–1d_(3/2) inversion).The inversion mechanism induced by the SLy5+Tw interaction is analyzed based on the proton single−particle spectra obtained from the SLy5 and SLy5+Tw interactions as well as the wave functions of the 2s_(1/2) and 1d_(3/2) states.

关键词： force tensor bubble

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Improved circulation in ocular ischemic syndrome after carotid artery stenting

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Chinese Medical Journal 2011年第21期124卷 3598-3600页

作者： wang yan-ling zhao Lu LI Ming-ming Department of Ophthalmology Beijing Friendship Hospital Capital Medical University Beijing 100050 China

Ocular ischemic syndrome is a chronic ischemic eye disease including a series of ischemic ocular and brain syndromes caused by carotid artery occlusion or stenosis. Because of the different degrees of ischemia, clinical manifestations of ocular ischemic syndrome are diverse, and it is difficult to diagnose in the initial stage. The main strategy to treat ocular ischemic syndrome is elimination of carotid stenosis. We presented a patient who recovered dramatically after carotid artery stenting. The pre-stenting arm-retinal circulation time of the patient＇s left eye was prolonged, and a large amount of microaneurysm appeared at the posterior polar and mid-peripheral aspects of the left retina. The post-stenting arm-retinal circulation time of the left eve decreased to 16.3 seconds, and the microaneurvsm almost disappeared.

关键词： ocular ischemic syndrome retinal microaneurysm carotid artery stenosis stent

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