AIM: To evaluate the influence of various clinicopathologicfactors on survival of patients with bile duct carcinoma aftercurative resection.METHODS: A retrospective analysis was made for 86 casesof bile duct carcinoma...AIM: To evaluate the influence of various clinicopathologicfactors on survival of patients with bile duct carcinoma aftercurative resection.METHODS: A retrospective analysis was made for 86 casesof bile duct carcinoma treated from January 1981 toSeptember 1995. Fifteen clinicopathologic factors possiblyinfluencing survival were selected. Independent variableswere first analyzed by univariate methods. Survival forvariable was estimated by the method of Kaplan and Meier.The variables that were statistically significant by univarlateanalysis were included in a multivariate analysis, which wereconfirmed using the Cox stepwise proportion hazard modelwith the help of SPSS 10.0 for Windows software.RESULTS: The overall cumulative survival rate was 72.6 %at 1 year, 32.4 % at 3 years, and 18.7 % at 5 years. Theresults of univariate analysis showed that the majorsignificant prognostic factors influencing survival of thesepatients were histological type of lesion, lymph nodemetastasis, pancreatic invasion, duodenal invasion, pedneuralinvasion, macroscopic vessel involvement, resected surgicalmargin and depth of cancer invasion (P＝0.02, 0.02, 0.004,0.005, 0.01, 0.43, 0.03 and 0.04). Age, sex, location of tumor,size of tumor, macroscopic type of lesions, hepaticmetastasis, and hepatic invasion were not significantlyassociated with prognosis (P＞0.05). Pancreatic invasion,perineural invasion and lymph node metastases were thethree most important prognostic factors by multivariateanalysis using the Cox proportional hazards model.CONCLUSION: Pancreatic invasion, pedneural invasion andlymph node metastases are the most important prognosticfactors for bile duct carcinoma after curative resection.展开更多
A comprehensive strength monitoring system used on a fixed jacket platform is presented in this paper. The long-term monitoring of W-11-4A platform achieved. Structural responses (strain and acceleration) at selected ...A comprehensive strength monitoring system used on a fixed jacket platform is presented in this paper. The long-term monitoring of W-11-4A platform achieved. Structural responses (strain and acceleration) at selected locations, as well as associated environmental parameters, have been obtained. The emphasis of the paper is placed on the system design, and the instrumentation and operation methodology employed in the monitoring of the structural responses. The performance of the system and the characteristic results obtained during its 13-month operation are also summarized.展开更多
For the synthesis of O-monosaccharidyl-methoxycarhon a new method in which Arbuzov reaction of monosaccharidylphosphoramidite with methyl chloroformate is the key step.is reported. Thus,a number of novel O-monosacchar...For the synthesis of O-monosaccharidyl-methoxycarhon a new method in which Arbuzov reaction of monosaccharidylphosphoramidite with methyl chloroformate is the key step.is reported. Thus,a number of novel O-monosaccharidyl-methoxycarbonylphosphonamidates were obtained successfully.展开更多
The active intermediates 'substituted aniline radicals' were detected by ESR method duringthe reduction of substituted nitroarenes in the presence of methylviologen (MV2+) as electron-transfer catalyst (ETC).
文摘AIM: To evaluate the influence of various clinicopathologicfactors on survival of patients with bile duct carcinoma aftercurative resection.METHODS: A retrospective analysis was made for 86 casesof bile duct carcinoma treated from January 1981 toSeptember 1995. Fifteen clinicopathologic factors possiblyinfluencing survival were selected. Independent variableswere first analyzed by univariate methods. Survival forvariable was estimated by the method of Kaplan and Meier.The variables that were statistically significant by univarlateanalysis were included in a multivariate analysis, which wereconfirmed using the Cox stepwise proportion hazard modelwith the help of SPSS 10.0 for Windows software.RESULTS: The overall cumulative survival rate was 72.6 %at 1 year, 32.4 % at 3 years, and 18.7 % at 5 years. Theresults of univariate analysis showed that the majorsignificant prognostic factors influencing survival of thesepatients were histological type of lesion, lymph nodemetastasis, pancreatic invasion, duodenal invasion, pedneuralinvasion, macroscopic vessel involvement, resected surgicalmargin and depth of cancer invasion (P＝0.02, 0.02, 0.004,0.005, 0.01, 0.43, 0.03 and 0.04). Age, sex, location of tumor,size of tumor, macroscopic type of lesions, hepaticmetastasis, and hepatic invasion were not significantlyassociated with prognosis (P＞0.05). Pancreatic invasion,perineural invasion and lymph node metastases were thethree most important prognostic factors by multivariateanalysis using the Cox proportional hazards model.CONCLUSION: Pancreatic invasion, pedneural invasion andlymph node metastases are the most important prognosticfactors for bile duct carcinoma after curative resection.
文摘A comprehensive strength monitoring system used on a fixed jacket platform is presented in this paper. The long-term monitoring of W-11-4A platform achieved. Structural responses (strain and acceleration) at selected locations, as well as associated environmental parameters, have been obtained. The emphasis of the paper is placed on the system design, and the instrumentation and operation methodology employed in the monitoring of the structural responses. The performance of the system and the characteristic results obtained during its 13-month operation are also summarized.
文摘For the synthesis of O-monosaccharidyl-methoxycarhon a new method in which Arbuzov reaction of monosaccharidylphosphoramidite with methyl chloroformate is the key step.is reported. Thus,a number of novel O-monosaccharidyl-methoxycarbonylphosphonamidates were obtained successfully.
文摘The active intermediates 'substituted aniline radicals' were detected by ESR method duringthe reduction of substituted nitroarenes in the presence of methylviologen (MV2+) as electron-transfer catalyst (ETC).
