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从同位素年龄看白云鄂博稀土-铌-铁矿床区域地质演化历史 被引量:5
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作者 费晓杰 曾普胜 +1 位作者 颜春军 温利刚 《地质与勘探》 CAS CSCD 北大核心 2019年第2期461-471,共11页
内蒙古白云鄂博稀土-铌-铁矿床是世界上著名的巨型多金属矿床,但对其区域地质演化历史的认识至今仍不统一,而同位素年龄是解决矿床区域地质演化历史的有效手段。本文基于测年方法对白云鄂博矿床同位素年龄数据收集整理,结合矿床地质背... 内蒙古白云鄂博稀土-铌-铁矿床是世界上著名的巨型多金属矿床,但对其区域地质演化历史的认识至今仍不统一,而同位素年龄是解决矿床区域地质演化历史的有效手段。本文基于测年方法对白云鄂博矿床同位素年龄数据收集整理,结合矿床地质背景对矿床区域地质演化历史进行讨论:白云鄂博矿床发育在上太古界-下元古界结晶基底色尔腾山群之上,中元古代白云鄂博裂谷期的海底火山喷发-同生沉积作用发育了层状的含稀土铌铁矿层,同时发育了广泛的碳酸岩墙群和基性岩墙群,这是白云鄂博矿床最主要的成矿事件。白云鄂博矿床还经历过至少三次后期成矿热事件叠加或改造成矿,主要包括:(1)新元古代南华期热事件(约720Ma);(2)早古生代志留纪晚期叠加成矿事件(约440Ma);(3)晚古生代二叠纪岩浆岩侵入事件(约280Ma)。白云鄂博矿床是中元古代裂谷成矿事件为主并叠加了后期多次热事件的结果。 展开更多
关键词 白云鄂博 稀土-铌-铁矿床 年龄数据分析 演化历史
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The pooled analysis of single gemcitabine for non-small cell lung cancer patients with elderly age 被引量:1
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作者 Fang Wang Liangping Xia +3 位作者 Guifang Guo Huijuan Qiu Feifei Zhou Wenzhuo He 《The Chinese-German Journal of Clinical Oncology》 CAS 2010年第12期683-687,共5页
Objective:Gemcitabine,used as single agent for elderly patients with non-small cell lung cancer (NSCLC),was demonstrated effective in this population based on phase II studies.The aim of this study was to summarize al... Objective:Gemcitabine,used as single agent for elderly patients with non-small cell lung cancer (NSCLC),was demonstrated effective in this population based on phase II studies.The aim of this study was to summarize all those phase II studies with the hope to get a comprehensive understanding of gemcitabine efficacy.Methods:The PubMed database was used to search all the papers on NSCLC associated with gemcitabine used as single agent in the first line setting till to March 31st,2010.And the medians and their 95% CI of overall response rate (ORR),disease control rate (DCR),progression free survival (PFS),and overall survival (OS) were calculated.Results:1.There were 7 papers including 410 patients with performance status (PS) ≤ 2 and advanced stage collected.2.The dose-intensities of gemcitabine were 843.75 mg/m 2 /week-1125 mg/m 2 /week in the 4-week schedule,and 666.7 mg/m 2 /week in the 3-week schedule.3.The median age was 73.8 (95% CI was 72.44,75.16) years old;36.1% (95% CI:31.4%,40.7%) of patients with stage IIIB and 60.5% (95% CI:55.8%,65.2%) of patients with stage IV;35.9% (95% CI:31.2%,40.5%) patients were adenocarcinomas and 43.7% (95% CI:38.9%,48.5%) patients were squamous cell carcinomas (SCCs).4.The ORR,DCR,PFS/TTP,and OS were 22.3% (95% CI:18.2%,26.5%),58.4% (95% CI:53.5%,63.4%),3.6 (95% CI:2.9,5.15) months and 6.68 (95% CI:5.4,8.11) months,respectively.Conclusion:Gemcitabine as single agent applied in this special population was effective and can be well tolerated under different doses and usage. 展开更多
关键词 ELDERLY non-small cell lung cancer (NSCLC) pooled-analysis GEMCITABINE first line setting
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Seat belt use during pregnancy in Iran: attitudes and practices
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作者 Mojgan Karbakhsh Zahra Ershadi +1 位作者 AliKhaji FatemehRahimi-Sharblaf 《Chinese Journal of Traumatology》 CAS 2010年第5期275-278,共4页
Objective: Seat belt use during pregnancy reduces injury to the mother and her fetus. During recent years, the use of seat belts has been mandated by law in Iran. The purpose of this study was to determine the attitu... Objective: Seat belt use during pregnancy reduces injury to the mother and her fetus. During recent years, the use of seat belts has been mandated by law in Iran. The purpose of this study was to determine the attitudes and practices of pregnant women regarding seat belt use. Methods: In this cross-sectional study, we asked 335 pregnant women at a hospital-based prenatal care clinic on the use of safety belt before and during pregnancy. SPSS version 13.0 was used for data analysis. Results: The mean age of study subjects was 27.3 years±5.3 years with the median of 27 years. Compared with the seat belt use before pregnancy, no change was detectedin 48.7% of the women; seat belt use had increased in 17.5 % of them and decreased in 33.8 %. Eighty-one percent of women knew the correct placing &both lap belt and shoulder belt. Only 4% of women had received education on proper restraint use during pregnancy. Conclusions: The prevalence of seat belt use during pregnancy is lower than reports which are mostly from developed nations. The fact that about one-third of women have decreased their seat belt usage during pregnancy highlights the importance of education of mothers on this topic. 展开更多
关键词 Seat belts PREGNANCY Accident traffic SAFETY
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