维普中文期刊产品整合服务
10篇 您的检索式:作者名="PingXU"
    题名 作者 年代 出处 被引量
1Experimental Study of Rat Beta Islet Cells Cultured under Simulated Microgravity Conditions显示文摘To observe the effects of simulated microgravity on beta islet cell culture, we have compared the survival rates and the insulin levels of the isolated rat islet cells cultured at micro- and normal gravity conditions. The survival rates of the cells cultured were determined by acridine orange-propidium iodide double-staining on day 3,7 and 14. The morphology of the cells was observed by electron microscopy.Insulin levels were measured by radio immuno assays. Our results show that the cell number cultured underthe microgravity condition is significantly higher than that under the routine condition (P<0.01). Some tubular structure shown by transmission electron microscopy, possibly for the transport of nutrients, were formed intercellularly in the microgravity cultured group on day 7. There were also abundant secretion particles and mitochondria in the cytoplasm of the cells. Scanning electron microscopy showed that there were holes formed between each islet, possibly connecting with the nutrient transport tubules. The microgravity cultured group also has higher insulin levels in the media as compared with the control group (P<0.01). Our results indicate that microgravity cultivation of islet cells has advantages over the routine culture methods.ChunSONG Xiu-QingDUAN XiLI Li-OuHAN PingXU Chun-FangSONG: Lian-HongJIN 2004Acta Biochimica et Biophysica Sinica2004,36,1:7
2Solid-phase Synthesis of PNA Monomer by Ugi Four-component Condensation Reaction显示文摘Peptide nucleic acids (PNA) oligomers were synthesized in most cases by peptide synthesis from N-protected monomers. In this work a new method of obtaining PNA monomer by Ugi four-component condensation reaction was tested by solid-phase synthesis. The Fmoc protected PNA monomer was build up with thymin-1-yl acetic acid, 3-methylbutyl aldehyde, Fmoc protected aminoethyl isocyanide and Gly-Wang resin.WenHaoWANG XiaoMinZOU XinZHANG YiQiuFU PingXU 2005Chinese Chemical Letters2005,16,5:2
3Dispersion and size control of layered double hydroxide nanoparticies in aqueous solutions 显示文摘Zhi Pingxu 2006J Phys Chem B2006,110,16:1
4A Novel Method for Conversion of Valuable BDS Intermediates HPBS/Cx-HPBS from DBT/Cx-DBT显示文摘A simple recombinant PCR method was used to delete the dszB gene responsible for the slowest step of the Dsz pathway and allow the accumulation of hydroxyphenyl benzene sulfinate (HPBS) in the recombinant E. coli. Using GC/MS, HPBS accumulation was confirmed. The recombinant E. coli could also desulfurize Cx-DBT to corresponding Cx-HPBS. The result gave a new insight to BDS process and explored a new method to obtain valuable surfactants from cheap raw materials.BoYU JianHUANG XiaoFengCAI XiaoYongLIU CuiQingMA FuLiLI PingXU 2005Chinese Chemical Letters2005,16,7:1
5Development of a low‐density polyethylene‐containing passive sampler for measuring dissolved hydrophobic organic compounds in open waters显示文摘Lian‐JunBao Shi‐PingXu YanLiang Eddy Y.Zeng 2012Environmental Toxicology and Chemistry2012,,5:1
6Studies on adsorp-tion of phenol and 4-nitrophenol on Mg-Al-mixed oxide derivedfrom Mg-Al-layered double hydroxide 显示文摘Shuangling Chen Zhi Pingxu Qian Zhang 2009Separation and Purifica-tion Technology2009,67,:1
7Fabrication and Dielectric Characterization of Advanced BaTiO显示文摘Zhi‐MinDang You‐QinLin Hai‐PingXu Chang‐YongShi Sheng‐TaoLi JinboBai 2008Adv Funct Mater2008,,10:1
8Biodesulfurization in Biphasic Systems Containing Organic Solventa 显示文摘FeiTao BoYu PingXu 2006Applied and Environmental Microbiology2006,,7:1
9Preventing SurgicalDisputes Through Early Detection and Intervention: a CaseControl Study in Ciiina显示文摘PingXu Zhenlin Fan Ting Li 2015BMC Health Services Research2015,33,15:1
10Active control of time-delay in cutting vibration显示文摘The system dynamics of turning processes can be described by a delay diferential equation.How to improve the stability and suppress the vibration of cutting is of an interesting topic.In this paper,a multiple time-delay controller is developed based on discrete optimal control method for the turning vibrations control.Numerical simulations are carried out to verify the efciency of the controller.Results indicate the designed controller can suppress the cutting vibration efciently and improve the stability of the cutting processes.The influence of designed time-delay and sampling time on the control performance is also discussed.Pingxu Zheng Xinhua Long 2013Theoretical & Applied Mechanics Letters2013,3,6:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费