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子宫颈癌腹腔镜手术治疗的中国专家共识 被引量:44
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作者 陈春林 郎景和 +11 位作者 向阳 刘萍 宋磊 狄文 康山 郝敏 王武亮 凌斌 陆安伟 孟元光 王泽华 刘开江 《中华妇产科杂志》 CAS CSCD 北大核心 2020年第9期579-585,共7页
由于子宫颈癌腹腔镜手术路径研究(LACC)的结论使得包括美国国立综合癌症网络(NCCN)、欧洲妇科肿瘤协会(ESGO)等国际组织的指南更改了子宫颈癌手术治疗的标准手术途径为开腹,限制了腹腔镜技术在子宫颈癌中的应用。但在中国,腹腔镜技术广... 由于子宫颈癌腹腔镜手术路径研究(LACC)的结论使得包括美国国立综合癌症网络(NCCN)、欧洲妇科肿瘤协会(ESGO)等国际组织的指南更改了子宫颈癌手术治疗的标准手术途径为开腹,限制了腹腔镜技术在子宫颈癌中的应用。但在中国,腹腔镜技术广泛地应用于子宫颈癌的治疗,已被医患双方所接受。近1年来,越来越多的研究结果显示,在特定期别的子宫颈癌患者中腹腔镜手术的肿瘤学结局等效于开腹手术。因此,依据目前国内外的相关研究文献,根据中国的实际情况,组织专家制定本共识,旨在规范腹腔镜技术在子宫颈癌治疗中的应用,严格把握腹腔镜手术的适应证和禁忌证,规范手术操作,减少术中和术后并发症,改善患者的肿瘤学结局;同时,特别强调需对开展子宫颈癌腹腔镜手术的医师进行规范化培训。 展开更多
关键词 腹腔镜手术 腹腔镜技术 肿瘤学 手术途径 规范化培训 妇科肿瘤 开腹手术 医患双方
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协同护理模式在脑卒中患者运动功能障碍康复中的应用 被引量:32
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作者 肖群 刘睿 +4 位作者 郎红娟 金葵花 宋艳 杨敏 刘朝晖 《解放军护理杂志》 CSCD 北大核心 2018年第1期62-65,共4页
目的探讨协同护理模式(collaborative care model,CCM)在脑卒中患者运动功能障碍康复中的应用方法及效果。方法2016年6-12月,便利抽样法选取西安市某三级甲等医院康复医学科收治的70例脑卒中患者为研究对象。采用随机数字表法将患者随... 目的探讨协同护理模式(collaborative care model,CCM)在脑卒中患者运动功能障碍康复中的应用方法及效果。方法2016年6-12月,便利抽样法选取西安市某三级甲等医院康复医学科收治的70例脑卒中患者为研究对象。采用随机数字表法将患者随机分为观察组和对照组各35例。对照组患者给予常规护理和功能锻炼指导,观察组患者在对照组基础上应用CCM模式干预的功能锻炼,评价并比较两组患者干预前后的平衡功能及日常生活活动能力。结果干预前,两组患者Berg平衡量表(Berg balance stage,BBS)评分、改良Barthel指数(modified Bartherl Index,MBI)评分比较,差异均无统计学意义(均P>0.05);干预后,观察组患者BBS评分、MBI评分均高于对照组,差异均有统计学意义(均P<0.05)。结论将CCM应用于脑卒中患者日常护理中,有助于患者运动功能状态恢复,提高患者日常生活活动能力。 展开更多
关键词 脑卒中 协同护理模式 日常生活能力 运动功能障碍 康复
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Effects of Percutaneous Coronary Intervention on Serum Angiopoietin-2 in Patients with Coronary Heart Disease 被引量:22
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作者 Zhi-Yu Zeng Chun Gui +1 位作者 lang Li Xiao-min Wei 《Chinese Medical Journal》 SCIE CAS CSCD 2016年第6期631-635,共5页
Background: Angiopoietin-2 (Ang-2) plays a crucial role in hypoxia-induced angiogenesis and is expressed only in sites of vascular remodeling. Ang-2 expression can be regulated by hypoxia inducible factors and othe... Background: Angiopoietin-2 (Ang-2) plays a crucial role in hypoxia-induced angiogenesis and is expressed only in sites of vascular remodeling. Ang-2 expression can be regulated by hypoxia inducible factors and other regulators with exposure to hypoxia. The objective of this study was to investigate the influence of percutaneous coronary intervention (PCI) on serum Ang-2 concentrations, and analyze the correlation between serum Ang-2 and the severity of coronary artery stenosis in patients with coronary heart disease (CHD). Methods: Sixty-four patients with CHD were selected as the study group, each undergone PC1. Thirty-two healthy subjects were selected as the control group. Pre-PCI and post-PCl serum Ang-2 were measured by enzyme-linked immunosorbent assay. The severity of coronary artery stenosis was evaluated using angiographic Gensini scores, and the coronary collateral vessels were scored according to Rentrop's classification. Results: Concentrations of pre-PCI serum Ang-2 in the study group were significantly higher than those in the control group (4625.06 ~ 1838.06 vs. 1945.74 :k 1588.17 pg/ml, P 〈 0.01 ); however, concentrations of post-PCl serum Ang-2 were significantly lower than those of pre-PCI (3042.63 + 1845.33 pg/ml vs. 4625.06 .k 1838.06 pg/ml, P 〈 0.01). Concentrations of pre-PCl serum Ang-2 were significantly correlated with Gensini scores (r= 0.488, P〈 0.01); however, the decrease in serum Ang-2 after PC1 was not correlated with Gensini scores, coronary collateral vessel grading, or left ventricular ejection fraction. Conclusions: Serum Ang-2 concentrations significantly increased in patients with CHD, and PCI treatment significantly decreased these concentrations. Serum Ang-2 concentrations, but not the decrease in serum Ang-2 concentrations, were significantly correlated with the severity of coronary artery stenosis. These results suggested that Ang-2 may be a biomarker of myocardial ischemia and vessel remodeling. 展开更多
关键词 ANGIOGENESIS ANGIOPOIETIN-2 Collateral Vessels Coronary Heart Disease Gensini Score
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Lake Level Changes Recorded by Tree Rings of Lakeshore Shrubs: A Case Study at the Lake West-Juyan, Inner Mongolia, China 被引量:16
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作者 Sheng-Chun XIAO Hong-lang XIAO Jian-Hua SI Xi-Bin JI Fa-min LIU 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2005年第11期1303-1314,共12页
Variation in water resources is a main factor influencing ecohydrological processes and sustainable development in arid regions. Lake level changes are a useful indicator of the variability in water resources. However... Variation in water resources is a main factor influencing ecohydrological processes and sustainable development in arid regions. Lake level changes are a useful indicator of the variability in water resources. However, observational records of changes in lake levels are usually too short to give an understanding of the long-term variability. In the present study, we investigated the tree rings of shrubs growing on the lakeshore of Lake West-Juyan, the terminus of the Heihe River in western China, and found that Lake West-Juyan had undergone degradation three times over the past 200 years. The lake level decreased from 904.3 to 896.8 m above sea level (a.s.1.) during the period 1800-1900, to 892.0 m a.s.1, from around 1900 to the late 1950s, and the lake dried out in 1963. The trend for changes in lake levels, which was represented by the composite chronology of three beach bars, showed that the phases of increasing lake levels over the past 150 years were during the periods 1852-1871, 1932-1952, 1973-1982, and 1995-1999. Comparison with the history of regional economic development showed that human activity has played an important role in regulating the water resources of the lower reaches of the Heihe watershed over the past 200 years. 展开更多
关键词 dendrochronology lake degradation events Lake West-Juyan lakeshore shrubs reconstruction of the lake level changes tamarisk.
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^(125)I粒子植入联合化疗治疗原发性中晚期非小细胞肺癌的疗效观察 被引量:16
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作者 何枫 郎伟思 +5 位作者 吴小明 赖光湖 郭敏 胡奎 刘恒 杨龙 《第三军医大学学报》 CAS CSCD 北大核心 2017年第23期2307-2311,共5页
目的观察CT引导下放射性^(125)I粒子植入联合化疗治疗原发性中晚期非小细胞肺癌的疗效。方法收集2012-2016年重庆市第五人民医院收治的40例原发性中晚期非小细胞肺癌患者临床资料,分为研究组和对照组,每组20例。研究组患者接受^(125)I... 目的观察CT引导下放射性^(125)I粒子植入联合化疗治疗原发性中晚期非小细胞肺癌的疗效。方法收集2012-2016年重庆市第五人民医院收治的40例原发性中晚期非小细胞肺癌患者临床资料,分为研究组和对照组,每组20例。研究组患者接受^(125)I粒子植入联合化疗,对照组患者接受^(125)I粒子植入术。所有患者按照三维实体计划系统制定粒子植入计划。术后第2、6个月复查胸部CT。按照实体瘤疗效评价标准(response evaluation criteria in solid tumors,RECIST1.1)测量患者实体瘤最大直径之和,评价两组实体瘤治疗效果。结果所有患者术后随访6个月。研究组术后2个月和6个月的总体有效率分别为70%和75%,对照组的总体有效率分别为30%和35%,两组6个月总体有效率差异具有统计学意义(P<0.05)。两组患者发生的不良反应主要为气胸、咯血等,差异无统计学意义(P>0.05)。结论 CT引导下放射性^(125)I粒子植入联合化疗治疗原发性中晚期非小细胞肺癌的有效率较单纯放射性^(125)I粒子植入治疗更高,疗效更显著。 展开更多
关键词 ^125I粒子植入 非小细胞肺癌 化学疗法
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Clinical significance of expression of proliferating cell nuclear antigen and E-cadherin in gastric carcinoma 被引量:15
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作者 lin Hu Hong-lang li +4 位作者 Wei-feng li Jun-min Chen Jian-tao Yang Jun-Jing Gu lin Xin 《World Journal of Gastroenterology》 SCIE CAS 2017年第20期3721-3729,共9页
AIM to investigate the expression of proliferating cell nuclear antigen(p CNA)and E-cadherin in gastric carcinoma and to analyze their clinical significance.METHODS A total of 146 patients were selected for this study... AIM to investigate the expression of proliferating cell nuclear antigen(p CNA)and E-cadherin in gastric carcinoma and to analyze their clinical significance.METHODS A total of 146 patients were selected for this study,including 38 patients with intestinal metaplasia,42with dysplasia,and 66 with primary gastric cancer.In addition,40 patients with normal gastric tissues were selected as controls.the expression of p CNA and E-cadherin was detected by immunohistochemistry.Differences in p CNA and the E-cadherin labeling indexes among normal gastric mucosa,intestinal metaplasia,dysplasia,and gastric carcinoma were compared.Subjects with normal gastric tissues were assigned to a normal group,while gastric cancer patients were assigned to a gastric cancer group.the difference in p CNA and E-cadherin expression between these two groups was compared.the relationship between expression of p CNA and E-cadherin and clinicopathological features was also explored in gastric cancer patients.furthermore,prognosis-related factors,as well as the expression of p CNA and E-cadherin,were analyzed in patients with gastric cancer to determine the 3-year survival of these patients.RESULTS the difference in p CNA and the E-cadherin labeling indexes among normal gastric mucosa,intestinal metaplasia,dysplasia,and gastric carcinoma was statistically significant(p<0.05).During the transition of normal gastric mucosa to gastric cancer,the p CNA labeling index gradually increased,while the E-cadherin labeling index gradually decreased(p<0.05).the p CNA labeling index was significantly higher and the E-cadherin labeling index was significantly lower in gastric cancer than in dysplasia(p<0.05).the expression of p CNA was significantly higher in the gastric cancer group than in the normal group,but E-cadherin was weaker(p<0.05).there was a negative correlation between the expression of p CNA and E-cadherin in gastric carcinoma(r=-0.741,p=0.000).p CNA expression differed significantly between gastric cancer patients with and without lymph node met 展开更多
关键词 proliferating cell nuclear antigen E-CADHERIN Gastric cancer Gastric mucosa
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Proportion of Uterine Malignant Tumors in Patients with Laparoscopic Myomectomy: A National Multicenter Study in China 被引量:10
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作者 Hua Yang Xiao-Chuan Li +31 位作者 Chen Yao Jing-He lang Hang-Mei Jin ming-Rong Xi Gang Wang Lu-Wen Wang min Hao Yan Ding Jie Chen Jian-Qing Zhang Lu Han Cheng-Xiu Guo Xiang Xue Yan Li Jian-Hua Zheng Man-Hua Cui Huai-Fang Li Guang-Shi Tao Long Chen Su-min Wang An-Wei LU Ze-Hua Huang Qing Liu Ya-Li Zhuang Xiang-Hua Huang Gen-Hai Zhu Ou-Ping Huang Li-Na Hu Mu-Jun Li Hong-Lin Zhou Jing-Hui Song Lan Zhu 《Chinese Medical Journal》 SCIE CAS CSCD 2017年第22期2661-2665,共5页
Background: The Food and Drug Administration recently announced that the use of morcellation may cause fibroids or pelvic dissemination and metastasis of uterine sarcoma; therefore, the use of morcellation is limited... Background: The Food and Drug Administration recently announced that the use of morcellation may cause fibroids or pelvic dissemination and metastasis of uterine sarcoma; therefore, the use of morcellation is limited in the USA. A large sample study is necessary to assess the proportion of uterine malignant tumors found in patients with laparoscopic myomectomy. Methods: A national multicenter study was performed in China. From 2002 to 2014, 33,723 cases were retrospectively selected. We calculated the prevalence and recorded the clinical characteristics of the patients with malignancy after morcellation application. A total of 62 cases were finally pathologically confirmed as malignant postoperatively. Additionally, the medical records of the 62 patients were analyzed in details. Results: The proportion of postoperative malignancy after morcellation application was 0.18% (62/33,723) for patients who underwent laparoscopic myomectomy. Nearly 62.9% (39/62) of patients had demonstrated blood flow signals in the uterine fibroids before surgery. And, 23 (37.1%) patients showed rapid growth at the final preoperative ultrasound. With respect to the pathological types, 38 (61.3%) patients had detectable endometrial stromal sarcoma, 13 (21.0%) had detectable uterine leiomyosarcoma, only 3 (3.2%) had detectable carcinosarcoma, and 5 (8.1%) patients with leiomyoma had an undetermined malignant potential. Conclusions: The proportion of malignancy is low after using moreellation in patients who undergo laparoscopie myomectomy. Patients with fast-growing uterine fibroids and abnormal ultrasonic tumor blood flow should be considered for malignant potential, and morcellation should be avoided. 展开更多
关键词 Laparoscopic Myomectomy MORCELLATION SARCOMA
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SMILE与FS-LASIK矫正高度近视术后5年屈光结果及眼内散射分析 被引量:11
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作者 郎敏 张娇 +4 位作者 陶露莎 余婷 潘娇 刘明明 叶剑 《第三军医大学学报》 CAS CSCD 北大核心 2021年第24期2698-2704,共7页
目的比较飞秒激光小切口角膜基质透镜取出术(small incision lenticule extraction,SMILE)和飞秒激光制瓣的准分子激光原位角膜磨镶术(femtosecond laser-assisted LASIK,FS-LASIK)矫正高度近视及散光术后5年屈光结果以及散射相关视觉... 目的比较飞秒激光小切口角膜基质透镜取出术(small incision lenticule extraction,SMILE)和飞秒激光制瓣的准分子激光原位角膜磨镶术(femtosecond laser-assisted LASIK,FS-LASIK)矫正高度近视及散光术后5年屈光结果以及散射相关视觉质量的差异。方法回顾性分析2011年12月至2013年7月在我科行飞秒激光角膜屈光矫正术的高度近视患者58例,按患者选择的手术方式不同分为SMILE组30例(30只眼)和FS-LASIK组28例(28只眼),仅左眼纳入研究。将术前,术后3个月、6个月、1年和5年的数据进行统计分析,观察患者裸眼远视力(uncorrected distant visual acuity,UDVA)、最佳矫正远视视力(corrected distance visual acuity,CDVA)、等效球镜度(spherical equivalent,SE),双通道视觉质量分析系统(Optical Quality Analysis System,OQASⅡ)检查统计眼内客观散射指数(objective scattering Index,OSI)、调制传递函数截止频率(modulation transfer function cutoff frequency,MTF_(cutoff))、斯特列尔比值(Strehl ratio,SR)、对比度为100%、20%和9%时的视力(VA100%、VA20%、VA9%)。结果术后5年,安全性指数SMILE组1.136±0.099,FS-LASIK组1.128±0.129,两组比较无统计学差异(P>0.05);有效性指数SMILE组1.072±0.151,FS-LASIK组1.063±0.145,两组比较无统计学差异(P>0.05);术后5年UDVA达到1.0及以上的SMILE组占77%,FS-LASIK组占71%;可预测性SMILE组在±0.50D以内的占87%,FS-LASIK组占75%。SMILE组等效球镜度术前为(-7.22±0.91)D、术后5年为(-0.12±0.38)D,FS-LASIK组术前为(-8.01±1.09)D、术后5年为(-0.31±0.44)D,协方差分析两组术后5年SE有统计学差异(P<0.05)。术后5年两组MTF、SR、VA20%、VA9%比较差异均无统计学意义(P>0.05),但两组OSI、VA100%相比差异有统计学意义(P<0.05)。结论 SMILE与FS-LASIK两种手术方式矫正高度近视5年具有相似的有效性、安全性、可预测性和稳定性,SMILE术后对眼内散射的影响略小于FS-LASIK手术。 展开更多
关键词 飞秒激光小切口角膜基质透镜取出术 飞秒激光制瓣的准分子激光原位角膜磨镶术 高度近视 术后5年 视觉质量 散射
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非农就业、社会保障与农民工市民化--基于双变量Probit模型的分析 被引量:11
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作者 刘帅 郎敏 郭庆海 《农业经济与管理》 CSSCI 北大核心 2021年第4期63-73,共11页
利用双变量Probit模型分析非农就业与社会保障对农民工市民化的影响。非农就业性质、劳动合同及医疗保险与包含养老保险和失业保险在内的社会保障卡正向影响农民工市民化;务工城市更换次数负向影响农民工市民化。城市提供丰富且稳定的... 利用双变量Probit模型分析非农就业与社会保障对农民工市民化的影响。非农就业性质、劳动合同及医疗保险与包含养老保险和失业保险在内的社会保障卡正向影响农民工市民化;务工城市更换次数负向影响农民工市民化。城市提供丰富且稳定的就业岗位是实现农民工市民化的根本路径。在逐步提高农民工社会保障水平的前提下,实现农民工与原住市民同质化市民待遇是实现农民工市民化的终极境界。 展开更多
关键词 非农就业 社会保障 农民工市民化 双变量Probit模型
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传粉网络构建的定性定量分子研究:应用与展望 被引量:11
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作者 郎丹丹 唐敏 周欣 《生物多样性》 CAS CSCD 北大核心 2018年第5期445-456,共12页
传粉者是重要的生态功能提供者,在维持稳定的生态系统和高效的农业生产力中发挥着重要作用。因此,传粉网络的构建和监测工作对评价生态系统平衡和调控农业生产至关重要。该工作的基础就是通过对传粉者及植物的物种鉴定构建其相关性。传... 传粉者是重要的生态功能提供者,在维持稳定的生态系统和高效的农业生产力中发挥着重要作用。因此,传粉网络的构建和监测工作对评价生态系统平衡和调控农业生产至关重要。该工作的基础就是通过对传粉者及植物的物种鉴定构建其相关性。传统的形态学物种鉴定对分类学专家的专业知识、时间和经验都提出较高的要求。DNA条形码和高通量测序技术(high-throughput sequencing,HTS)的发展及其在传粉网络研究中的应用,提供了高效、准确鉴定传粉者与植物的方法,大大提高了传粉网络构建的效率。本文阐述了传粉网络研究相关的研究方法和技术进展,并提出利用高通量测序技术结合无PCR扩增(PCR-free)的"超级条形码"技术,有望实现以更高的灵敏度和分辨率对混合物种样品进行定性及相对定量的监测。该方法的有效性已在其他生物多样性研究中得以验证,在传粉网络研究中虽处于初始阶段,但应用前景广阔。 展开更多
关键词 线粒体 叶绿体 花粉 宏条形码 宏基因组 PCR-free 定量
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咸淡水交替灌溉对南疆设施番茄酶活性及产量品质的影响 被引量:5
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作者 辛朗 马嘉莹 +3 位作者 刘冉 唐茂淞 蒋敏 王兴鹏 《节水灌溉》 北大核心 2023年第1期33-39,共7页
为了探究不同咸淡水交替灌溉对设施番茄土壤盐分胁迫响应及产量品质的影响,以“秦岭蔬越”番茄品种为研究对象,共设置W1(淡咸咸)、W2(淡咸淡)和W3(咸淡淡)3种咸淡水交替灌溉方式,并以淡水灌溉(CK)对照。结果表明:在咸淡水交替灌溉方式下... 为了探究不同咸淡水交替灌溉对设施番茄土壤盐分胁迫响应及产量品质的影响,以“秦岭蔬越”番茄品种为研究对象,共设置W1(淡咸咸)、W2(淡咸淡)和W3(咸淡淡)3种咸淡水交替灌溉方式,并以淡水灌溉(CK)对照。结果表明:在咸淡水交替灌溉方式下,番茄生育期土壤盐分出现逐渐累积趋势,整体表现为W1>W2>W3处理,且W1、W2处理土壤盐分表聚现象较为严重,而W3处理土壤盐分有向下淋洗趋势,土壤表层积盐较轻。不同咸淡水交替灌溉后,由于土壤盐分累积程度不同,使番茄受到盐分胁迫的差异较大,其中番茄叶片内丙二醛(MDA)、脯氨酸(PRO)、可溶性蛋白(SP)、可溶性糖(SS)及超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)含量均有不同程度增加。由相关性分析可知,土壤盐分与番茄叶片CAT、PRO呈极显著性正相关(P<0.01),与叶片SS呈显著性正相关(P<0.05),说明番茄通过改变各种保护酶活性及渗透物质含量提高自身抗逆性,以应对盐分胁迫危害。通过对比分析,W3处理番茄可溶性固形物、硝酸盐、Vc和总酚含量及产量均高于对照,说明适宜的咸淡水交替灌溉方式能够提高番茄品质和产量。 展开更多
关键词 番茄 咸淡水交替灌溉 盐分动态 产量品质 酶活性
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等离子喷涂-物理气相沉积涡轮叶片7YSZ热障涂层 被引量:9
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作者 付朗 张小锋 +2 位作者 刘敏 曾德长 倪建洋 《材料研究与应用》 CAS 2020年第2期95-101,共7页
以纳米团聚的氧化钇稳定氧化锆(7YSZ)粉末为原料,通过等离子喷涂-物理气相沉积(PS-PVD)技术在涂覆有NiCoCrAlY粘结层涡轮叶片表面制备了羽毛柱状热障涂层,对不同部位涂层的微观结构进行表征.结果表明:PS-PVD技术在涡轮叶片上不同部位制... 以纳米团聚的氧化钇稳定氧化锆(7YSZ)粉末为原料,通过等离子喷涂-物理气相沉积(PS-PVD)技术在涂覆有NiCoCrAlY粘结层涡轮叶片表面制备了羽毛柱状热障涂层,对不同部位涂层的微观结构进行表征.结果表明:PS-PVD技术在涡轮叶片上不同部位制备的热障涂层结构相同,能够在非视线沉积区域的叶缘板表面获得典型的PS-PVD热障涂层结构.涂层沉积过程中,涡轮叶片构型对涂层沉积效率有明显影响,当喷枪垂直叶片旋转轴时,涂层在远离叶片旋转轴区域的厚度较低,原因在于凹型曲面对反射粒子具有汇聚作用而凸型曲面对粒子具有分散作用,两种因素结合可预测复杂构型叶片表面的涂层厚度分布规律.PS-PVD技术制备的热障涂层具有良好的抗热震性能,采用涂层表面镀铝改性工艺能减缓循环热应力造成的涂层失效. 展开更多
关键词 等离子喷涂-物理气相沉积 热障涂层 涡轮叶片 镀铝改性
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基于峰前和峰后能量演化特征的岩石脆性评价 被引量:9
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作者 温韬 张馨 +6 位作者 孙金山 贾永胜 郎珉 贾文君 李德成 孙莉霞 唐辉明 《地球科学》 EI CAS CSCD 北大核心 2021年第9期3385-3396,共12页
为了准确评价油气储藏水力压裂及岩爆等工程中岩石的脆性,总结了目前国内外已有的基于能量理论计算岩石脆性的方法,并指出了它们的局限性.综合考虑岩石峰前和峰后的能量演化特征,建立了一种基于全应力应变曲线的反映岩石变形破坏全过程... 为了准确评价油气储藏水力压裂及岩爆等工程中岩石的脆性,总结了目前国内外已有的基于能量理论计算岩石脆性的方法,并指出了它们的局限性.综合考虑岩石峰前和峰后的能量演化特征,建立了一种基于全应力应变曲线的反映岩石变形破坏全过程的脆性指数评价方法,更加全面地描述岩石的脆性特征.为了验证新方法的合理性,收集了4组岩石力学试验对新指数进行检验.试验结果表明:由峰前指数与峰后指数合成的脆性指数都随着围压的增加而减小,低围压下煤岩和页岩2组均具有较强的脆性,而高围压下红砂岩和页岩1组的脆性明显减弱,表现了随围压增大岩石发生脆延转换的特性.在实际边坡工程中通过对板岩进行脆性评价,验证了本文所提出的脆性指数在工程应用中的合理性,该成果有望对岩石脆性评价提供参考. 展开更多
关键词 岩石 脆性指数 应力‒应变曲线 能量演化 工程地质
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血管新生性青光眼患者房水中EPO、VEGF的表达研究 被引量:9
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作者 许多 阳建政 +3 位作者 刘莛 刘华 朗敏 贺翔鸽 《国际检验医学杂志》 CAS 2020年第1期78-81,86,共5页
目的 探讨血管新生性青光眼(NVG)患者房水中促红细胞生成素(EPO)、血管内皮生长因子(VEGF)检测表达及其与眼血流动力学及氧化应激状况的相关性,为NVG的诊治提供依据。方法 选择2017年1月至2018年12月在中国人民解放军陆军特色医学中心(... 目的 探讨血管新生性青光眼(NVG)患者房水中促红细胞生成素(EPO)、血管内皮生长因子(VEGF)检测表达及其与眼血流动力学及氧化应激状况的相关性,为NVG的诊治提供依据。方法 选择2017年1月至2018年12月在中国人民解放军陆军特色医学中心(下称该院)门诊收治的血管新生性青光眼患者35例为研究对象,将其设置为研究组;另选择同期该院收治的原发性青光眼患者35例为对照组。采用酶联免疫法检测两组患者房水中EPO及VEGF表达水平,同时使用超声检测患者眼血流动力学参数及氧化应激状况,并分析其相关性。结果 研究组EPO及VEGF水平分别为(192.34±10.27)ng/mL、(1 089.14±52.18)U/L,显著高于对照组的(49.13±5.48)ng/mL、(305.26±20.58)U/L,差异有统计学意义(P<0.05);研究组视网膜中央动脉EDV、PSA水平及腱状后短动脉EDV、PSA水平分别为(2.51±0.32)、(8.12±1.08)、(2.64±0.41)、(9.74±1.17)cm/s,显著低于对照组的(3.84±0.47)、(12.54±2.16)、(3.75±0.52)、(15.53±2.06)cm/s,差异有统计学意义(P<0.05);研究组患者房水中EPO及VEGF表达水平与视网膜中央动脉EDV、PSA水平及腱状后短动脉EDV、PSA水平存在显著的负相关(r=-0.374,P=0.000);研究组房水中MDA、AOPP水平分别为(3.48±0.49)、(2.51±0.58)nmol/mL显著高于对照组的(1.86±0.18)、(1.09±0.16)nmol/mL,差异有统计学意义(P<0.05);研究组房水中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)水平分别为(21.36±3.46)、(15.97±3.15)、(9.14±2.83)U/mL显著低于对照组的(59.15±8.09)、(42.12±6.76)、(24.12±4.14)U/mL,差异有统计学意义(P<0.05);研究组患者房水中EPO及VEGF表达水平与MDA、AOPP水平呈正相关(r=0.671,P=0.000),与SOD、GSH-Px、CAT水平呈负相关(r=-0.592,P=0.000)。结论NVG患者房水中EPO及VEGF表达水平显著高于原发性青光眼患者,且与眼血流动力学及氧化应激状况相关。检测EPO及VEGF在临床中的发病 展开更多
关键词 青光眼 新生血管性 促红细胞生成素 血管内皮生长因子 眼血流动力学 氧化应激 眼房水
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标准化管理下的农田灌溉水有效利用系数测算分析 被引量:8
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作者 郎敏 李一平 《中国标准化》 2021年第20期69-71,共3页
农田灌溉水有效利用系数是指灌入田间可被作物利用的水量与灌溉系统取用的灌溉总水量的比值,它反映灌区渠系输水和田间灌溉用水状况,是衡量灌区从水源引水到田间作物水分利用过程中灌溉水利用程度的一个关键指标,也是反映灌区自然条件... 农田灌溉水有效利用系数是指灌入田间可被作物利用的水量与灌溉系统取用的灌溉总水量的比值,它反映灌区渠系输水和田间灌溉用水状况,是衡量灌区从水源引水到田间作物水分利用过程中灌溉水利用程度的一个关键指标,也是反映灌区自然条件、工程状况、用水管理水平、灌溉技术等因素的一个综合性指标,是国家实行最严格水资源管理制度"三条红线"控制指标之一。 展开更多
关键词 农田灌溉 灌溉用水 有效利用
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我国杂草科学学科发展现状与展望 被引量:4
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作者 潘浪 刘敏 +6 位作者 刘伟堂 徐洪乐 黄兆峰 李俊 张铮 齐龙 柏连阳 《植物保护》 CAS CSCD 北大核心 2023年第5期295-302,389,共9页
杂草科学是研究杂草生物学特性、生长发育规律、分类与鉴定、分布与危害、群落结构与演替、抗药性机制、防治技术的综合学科。本文重点阐述了近5年(2018年-2022年)来我国杂草科学学科在杂草生物学与生态学、杂草抗药性机理、除草剂安全... 杂草科学是研究杂草生物学特性、生长发育规律、分类与鉴定、分布与危害、群落结构与演替、抗药性机制、防治技术的综合学科。本文重点阐述了近5年(2018年-2022年)来我国杂草科学学科在杂草生物学与生态学、杂草抗药性机理、除草剂安全剂作用机理、杂草防控技术等领域取得的系列研究进展,并展望了今后杂草科学学科的发展方向。 展开更多
关键词 杂草科学 杂草生物学与生态学 抗药性机制 除草剂安全剂 防控技术
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妇产科手术后盆腹腔粘连预防中国指南(2023年版) 被引量:4
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作者 朱兰 郎景和 +26 位作者 任常 张越伦 陈敦金 陈龙 陈亦乐 崔满华 狄文 段华 郝敏 黄向华 李佩玲 冒韵东 漆洪波 史惠蓉 宋磊 王沂峰 徐开红 许学先 薛翔 杨慧霞 姚书忠 张国楠 章汉旺 张淑兰 周慧梅 周应芳 朱卫国 《中华妇产科杂志》 CAS CSCD 北大核心 2023年第3期161-169,共9页
粘连是最常见的手术并发症,术后粘连在妇产科手术后也较为常见,术后粘连可能引起病理性的并发症,严重者甚至可危及生命。为了在临床上更好地预防粘连,在2015年的《预防妇产科手术后盆腹腔粘连的中国专家共识》基础上,根据新的研究结果,... 粘连是最常见的手术并发症,术后粘连在妇产科手术后也较为常见,术后粘连可能引起病理性的并发症,严重者甚至可危及生命。为了在临床上更好地预防粘连,在2015年的《预防妇产科手术后盆腹腔粘连的中国专家共识》基础上,根据新的研究结果,专家组遴选了与临床密切相关的12项问题进行了文献检索,并根据国际通用的标准进行了严谨评级和严格推荐。在兼顾严肃性、严谨性、严格性、实用性、科学性、权威性、政策性和安全性的前提下,最终制定了本指南,以规范临床工作,指导选择防粘连材料,加强防粘连意识,最终使患者获益。 展开更多
关键词 盆腹腔粘连 预防粘连 妇产科手术后 术后粘连 文献检索 中国专家共识 病理性 严谨性
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Accessory Breast Cancer Occurring Concurrently with Bilateral Primary Invasive Breast Carcinomas:A Report of Two Cases and Literature Review 被引量:8
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作者 Jin-yan Hao Cui-cui Yang +9 位作者 Fang-fang Liu Yi-ling Yang Shuai Li Wei-dong Li Ya-qing Li Rong-gang lang Yu Fan Estifanos Paulos Xin-min Zhang Li Fu 《Clinical oncology and cancer researeh》 CAS CSCD 2012年第3期197-201,共5页
The development of accessory breast tissue,which is found anywhere along the milk line,is attributed to the failure of milk line remnants to regress during embryogenesis.Primary tumors may arise from any ectopic breas... The development of accessory breast tissue,which is found anywhere along the milk line,is attributed to the failure of milk line remnants to regress during embryogenesis.Primary tumors may arise from any ectopic breast tissue.Accessory breast cancer occurring concurrently with primary invasive breast cancer is extremely rare.Two such cases were reported in this article.One was a 43-year-old Chinese female who exhibited bilateral breast cancer(invasive ductal carcinoma,not otherwise specified,IDC-NOS) and an accessory breast carcinoma(IDC-NOS) incidentally identified in her left axilla.The ectopic breast tissue in her right axilla presented with adenosis.The patient was surgically treated,followed by postoperative docetaxel epirubicin(TE) chemotherapy.The second case was a 53-year-old Chinese female with bilateral breast cancer(apocrine carcinoma) accompanied by an accessory breast carcinoma(IDC-NOS) in her right axilla that was also incidentally identified.The patient was surgically treated after three doses of cyclophosphamide epirubicin docetaxel(CET) neoadjuvant chemotherapy,followed by adjuvant chemotherapy of the same regimen. 展开更多
关键词 invasive breast cancer BILATERAL PRIMARY accessory breast cancer occurring concurrently
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Centralized isolation of Helicobacter pylori from multiple centers and transport condition influences 被引量:6
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作者 Ya-Nan Gong You-ming Li +27 位作者 Ning-min Yang Hong-Zhang Li Feng Guo lang Lin Qun-Ying Wang Jia-Kun Zhang Zi-Zhong Ji Ji-Bo Mao Jun-Liang Mao Zheng-Chao Shi Wu-Heng Tang Xin-Jian Zhu Wei Shao Xiao-Feng Zhang Xing-Hua Wang Yue-Feng Tong Mi-Zu Jiang Guang-Lan Chen Zhi-Yong Wang Hui-min Tu Guo-Fa Jiang Jian-Sheng Wu Xu-Peng Chen Qiu-Long Ding Hong Ouyang Feng-Zhe Jin Yan-Li Xu Jian-Zhong Zhang 《World Journal of Gastroenterology》 SCIE CAS 2015年第3期944-952,共9页
AIM:To evaluate the efficacy of centralized culture and possible influencing factors.METHODS:From January 2010 to July 2012,66452 patients with suspected Helicobacter pylori(H.pylori) infection from 26 hospitals in Zh... AIM:To evaluate the efficacy of centralized culture and possible influencing factors.METHODS:From January 2010 to July 2012,66452 patients with suspected Helicobacter pylori(H.pylori) infection from 26 hospitals in Zhejiang and Jiangsu Provinces in China underwent gastrointestinal endoscopy.Gastric mucosal biopsies were taken from the antrum for culture.These biopsies were transported under natural environmental temperature to the central laboratory in Hangzhou city and divided into three groups based on their transport time:5,24 and 48 h.The culture results were reported after 72 h and the positive culture rates were analyzed by a χ2 test.An additional 5736 biopsies from H.pylori-positive patients(5646 rapid urease test-positive and 90 14C-urease breath test-positive) were also cultured for quality control in the central laboratory setting.RESULTS:The positive culture rate was 31.66%(21036/66452) for the patient samples and 71.72%(4114/5736) for the H.pylori-positive quality control specimens.In the 5 h transport group,the positiveculture rate was 30.99%(3865/12471),and 32.84%(14960/45553) in the 24 h transport group.In contrast,the positive culture rate declined significantly in the 48 h transport group(26.25%; P < 0.001).During transportation,the average natural temperature increased from 4.67 to 29.14℃,while the positive culture rate declined from 36.67%(1462/3987) to 24.12%(1799/7459).When the temperature exceeded 24℃,the positive culture rate decreased significantly,especially in the 48 h transport group(23.17%).CONCLUSION:Transportation of specimens within 24 h and below 24℃ is reasonable and acceptable for centralized culture of multicenter H.pylori samples. 展开更多
关键词 CENTRALIZED ISOLATION HELICOBACTER PYLORI Influenc
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Linc00675 is a novel marker of short survival and recurrence in patients with pancreatic ductal adenocarcinoma 被引量:7
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作者 Dou-Dou Li Zhi-Qiang Fu +6 位作者 Qing Lin Yu Zhou Quan-Bo Zhou Zhi-Hua Li lang-Ping Tan Ru-Fu Chen Yi-min Liu 《World Journal of Gastroenterology》 SCIE CAS 2015年第31期9348-9357,共10页
AIM: To detect linc00675 expression in pancreatic ductal adenocarcinoma(PDAC),to analyze the relationship between the expression level of linc00675 and the clinical pathological characteristics,to explore the biologic... AIM: To detect linc00675 expression in pancreatic ductal adenocarcinoma(PDAC),to analyze the relationship between the expression level of linc00675 and the clinical pathological characteristics,to explore the biological functions of linc00675,and to determine whether linc00675 has independent prognostic value in PDAC.METHODS: We studied linc00675 expression among eight histologically confirmed PDAC tissue samples and four chronic pancreatitis tissue samples through microarray screening. RT-q PCR was conducted to further investigate linc00675 expression in PDAC cell lines as well as archived tissues from a large cohort of PDAC patients. The correlations between the level of lnc00675 and clinicopathological characteristics and survival in patients with pancreatic cancer were evaluated using Correlation analysis. Univariate andmultivariate analyses were conducted to predict whether lnc00675 expression is an independent prognostic and recurrence factor in patients with pancreatic cancer. After downregulating the expression of linc00675 through si RNA,MTT assay,flow cytometry,transwell assay and Western blot were used to explore the biological function of linc00675 in proliferation,invasion,and cell cycle progression of pancreatic cancer cells. The relative molecular expression levels of epithelial-mesenchymal transition were determined by reverse transcription-polymerase chain reaction(RT-PCR) and Western blot.RESULTS: The expression of Linc00675 in PDAC tissue samples was shown to be 672 times that in chronic pancreatitis tissue samples by microarray screening(P = 3.69 × 10-5). This finding was confirmed in tumor tissues from 90 patients with PDAC compared with adjacent normal tissue samples by quantitative RTPCR. We found that linc00675 overexpression positively correlated with lymph node metastasis(P = 0.005),perineural invasion(P = 0.006),and poor survival(P < 0.001). Univariate and multivariate analyses showed that linc00675 expression served as an independent predictor of overall survival(P = 0.009). Additiona 展开更多
关键词 Linc00675 Long noncoding RNAS Pro-gnosis BIOMARKER
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