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高压冷冻及冷冻替代样品制备方法在体扫描电镜中的应用 被引量:2
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作者 顾嘉敏 许淑嫚 +3 位作者 郭帅 巩志伟 倪兵 刘铮 《电子显微学报》 CAS CSCD 北大核心 2023年第4期471-480,共10页
高压冷冻及冷冻替代技术是一种利用高压和低温对含水组织样品进行瞬间冷冻固定和低温脱水的电镜样品制备技术,它因可以保存更加真实的细胞超微结构而常应用于透射电镜观察和分析。本文利用模式动物小鼠为材料,将这种技术应用于体扫描电... 高压冷冻及冷冻替代技术是一种利用高压和低温对含水组织样品进行瞬间冷冻固定和低温脱水的电镜样品制备技术,它因可以保存更加真实的细胞超微结构而常应用于透射电镜观察和分析。本文利用模式动物小鼠为材料,将这种技术应用于体扫描电镜的样品制备,并与常规化学固定的样品制备进行比较。结果显示在小鼠心肌组织中,高压冷冻及冷冻替代技术可以有效避免常规制备样品中的细胞器膜结构皱缩、细胞质分布不均匀、细胞核膜收缩形成锯齿状、甚至局部断裂等现象,使细胞超微结构更接近其生活时的状态。 展开更多
关键词 高压冷冻-冷冻替代 心肌组织 超微结构 体扫描电镜成像 三维重构
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Rabeprazole 10 mg versus 20 mg in preventing relapse of gastroesophageal reflux disease: a meta-analysis
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作者 ZHU Hai-di WANG Heng +2 位作者 XIA Xian-ming xu shu-man LAN Yao 《Chinese Medical Journal》 SCIE CAS CSCD 2013年第16期3146-3150,共5页
Background Several randomized controlled trials (RCTs) have compared endoscopic and symptomatic relapses in patients with erosive gastroesophageal reflux disease (GERD).We have summarized current evidence for rabe... Background Several randomized controlled trials (RCTs) have compared endoscopic and symptomatic relapses in patients with erosive gastroesophageal reflux disease (GERD).We have summarized current evidence for rabeprazole 10 or 20 mg once daily for GERD maintenance treatment over 1 or 5 years.Methods MEDLINE,EMBASE,and the Cochrane Central Register of Controlled Trials were searched,through August 2012,for eligible RCTs of adults with erosive GERD.The efficacies of rabeprazole 10 and 20 mg/d were compared.Results The search identified 288 citations,and five RCTs containing 1480 patients were considered eligible.Heartburn relapse rates did not differ significantly between patients treated with rabeprazole 10 and 20 mg/d for 1 year (relative risk (RR)=1.29; 95% confidence interval (CI):0.97-1.72),but differed in patients treated for 5 years (RR=1.274; 95% CI:1.005-1.615).Endoscopic relapse rates differed significantly between rabeprazole 10 and 20 mg/d for 1 year (RR=1.92;95% CI:1.21-3.06),for 5 years (RR=1.667; 95% CI:1.073-2.589),and in combined 1-and 5-year maintenance trials (RR=1.785; 95% CI:1.298-2.456).Conclusion Rabeprazole 20 mg/d was superior to rabeprazole 10 mg/d in preventing endoscopic relapse of erosive GERD,but that the two dosages were equivalent in symptomatic relief over 1 year. 展开更多
关键词 gastroesophageal reflux disease proton pump inhibitors RABEPRAZOLE RELAPSE ENDOSCOPY HEARTBURN
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