检索结果-南通市图书馆

Highly efficient bis(aminotropone) Ti catalyst for ethylene polymerization

Chinese Chemical Letters 2011年第2期22卷 213-216页

作者： Reza Sandaroos Saman Damavandi ali nazif Maraym Goharjoo ali Mohammadi Department of Chemistry School of SciencesFerdowsi University of MashhadP.O.Box 91775MashhadIran Department of Chemistry Islamic Azad University of SarvestanSarvestanIran

Synthesis and structure of Ti complex having a pair of chelating aminotropone[O-N]ligand have been *** of density functional theory（DFT） studies suggest that bis（aminotropone） Ti complex,when activated with methylaluminoxane （MAO）,have high potential for the polymerization of olefinic *** theoretical studies also show that the active species derived from bis（aminotropone） Ti catalyst normally possess higher electrophilicity nature compared with those produced using bis（phenoxyimine） Ti complexes（Ti-FI catalysts） which are known as high performance olefin polymerization catalysts. Bis（aminotropone） Ti catalyst generates a catalytically active species that has higher electrophilicity than a Ti-FI catalysts.

关键词： Aminotropone Ethylene polymerization DFT studies PI catalysts

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Biliary fistula after treatment for hydatid disease of the liver:When to intervene

引用

World Journal of Gastroenterology 2013年第3期19卷 355-361页

作者： nazif Zeybek Hakan Dede Deniz Balci ali Kagan Coskun Ismail Hakki Ozerhan Subutay Peker Yusuf Peker Department of Surgery Gulhane Military Medical Academy06010 AnkaraTurkey Department of Surgery Ankara University School of Medicine06410 AnkaraTurkey

AIM:To determine the outcome of patients with biliary fistula(BF)after treatment for hydatid disease of the liver. METHODS:Between January 2000 and December 2010,out of 301 patients with a diagnosis of hydatid cyst of the liver,282 patients who underwent treatment [either surgery or puncture,aspiration,injection and reaspiration(PAIR)procedure]were *** were grouped according to the presence or absence of postoperative biliary fistula(PBF)(PBF vs no-PBF groups,respectively).Preoperative clinical,radiological and laboratory characteristics,operative characteristics including type of surgery,peroperative detection of BF,postoperative drain output,morbidity,mortality and length of hospital stays of patients were compared amongst *** analysis was performed to detect factors predictive of *** operative characteristics(ROC)curve analysis were used to determine ideal cutoff values for those variables found to be significant.A comparison was also made between patients whose fistula closed spontaneously(CS)and those with intervention in order to find predictive fac-tors associated with spontaneous closure. RESULTS:Among 282 patients[median(range)age, 23(16-78)years;77.0%male];210(74.5%)were treated with conservative surgery,33(11.7%)radical surgery and 39(13.8%)underwent percutaneous drainage with PAIR procedure A PBF developed in 46(16.3%) patients,all within 5 d after *** maximum cyst diameter and preoperative alkaline phosphatase levels(U/L)were significantly higher in the PBF group than in the no-PBF group[10.5±3.7 U/L vs 8.4±3.5 U/L(Palization time was also significantly longer in the PBF group than in the no-PBF group[37.4±18.0 d vs 22.4±17.9 d(P40 U/L)and a peroperative attempt for fistula closure were significant predictors of PBF development (P=0.02,95%CI:-0.03-0.5 and P=0.001,95%CI:0.1-

关键词： Hydatid disease Biliary fistula Postoperative complications Surgery

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：