检索结果-南通市图书馆

An Observational Study of the Relationship Between Outcome and Platelet Reactivity in Chinese Patients Undergoing PCI Loading with 600 mg Clopidogrel

在线全文

学校读者我要写书评

暂无评论

Cardiovascular Innovations and Applications 2020年第3期16卷 27-35页

作者： Jing-xiu Li Ling Weng Xue-qi Li yang Li shu-jun Yan Zhao-yan Song Xue-yanZhang Li Cha Lin Lin tian-shu yang Wei-jun Lv Ying-nan Dai Ye-ping Chen De-Jun Xia Xin Li En-ze Jin Department of Cardiology The Fourth Affi liated Hospital of Harbin Medical UniversityHarbin150001 HeilongjiangChina School of Public Health of Harbin Medical University Harbin150001 HeilongjiangChina Internal Medicine Harbin Daoli Traditional Chinese Medicine HospitalHarbin150001 HeilongjiangChina

Objectives:We sought to determine whether high posttreatment platelet reactivity(HPPR)to a 600 mg loading dose of clopidogrel affects outcomes in Chinese patients with acute coronary syndrome(ACS)following percutaneous coronary intervention(PCI)and to investigate whether there is a relationship between the number of platelet reactivity units(PRUs)and the characteristics of the ***:Although impaired platelet response to clopidogrel is a strong predictor of unfavorable outcome after PCI,the impact of HPPR to a 600 mg loading dose of clopidogrel in Chinese patients with ACS undergoing PCI is still ***:We performed observational research on 134 unselected patients with ACS undergoing urgent or planned PCI with a 600 mg loading dose of *** activation was expressed as the PRU value measured by the VerifyNow ***:Among the 134 patients(mean age 60.62 years[standard deviation 9.13 years],60.4%male),there were 46 patients with HPPR(34.3%)and 88 patients without HPPR(65.7%).At a mean follow-up of 6 months(standard deviation 1 month),the rates of cardiac death,unstable angina,and rehospitalization for target lesion revascularization were higher in the HPPR group(19.6%vs.6.8%,P=0.029).Multivariate analysis identifi ed hemoglobin level and sex as independent predictors of the PRU value(y=456.355−1.736 x 1−31.880 x 2,P<0.05).On receiver operating characteristic curve analysis,PRU values could signifi cantly discriminate between patients with and patients without cardiac death,unstable angina,and rehospitalization for target lesion revascularization(area under the curve 0.758,95%confi dence interval 0.62–0.85,P=0.001,P<0.05).Conclusion:In patients with ACS,HPPR to a 600 mg loading dose of clopidogrel is associated with worse outcomes after *** is some relationship between the PRU value and the hemoglobin level and *** values can predict the prognosis.

关键词： clopidogrel platelet reactivity PCI VerifyNow assay high on-clopidogrel platelet reactivity

氧化镁载金钯双金属无溶剂催化氧化苯甲醇制备苯甲醛

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

应用化学 2021年第7期38卷 789-799页

作者：田舒阳吕荣文大连理工大学精细化工国家重点实验室大连116024

以聚乙烯醇(PVA)为保护剂,经NaBH4还原制备金钯纳米双金属并负载到Na2SiO3改性的MgO载体MgO-X上,得到Au-Pd/MgO-X催化剂。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等技术手段对Au-Pd/MgO-X催化剂的组成、结构... 详细信息

以聚乙烯醇(PVA)为保护剂,经NaBH4还原制备金钯纳米双金属并负载到Na2SiO3改性的MgO载体MgO-X上,得到Au-Pd/MgO-X催化剂。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等技术手段对Au-Pd/MgO-X催化剂的组成、结构和载体碱强度进行了表征。结果表明,该催化剂可在无溶剂条件下催化苯甲醇氧化,随着Au-Pd/MgO-X催化剂碱性增强,产物苯甲醛的选择性提高;在苯甲醇0.1 mol、催化剂Au-Pd/MgO-X 100 mg、O_(2)0.5 MPa、反应时间3 h、反应温度120℃的条件下,苯甲醇转化率为49.5%时,苯甲醛的选择性达94.7%。催化剂重复使用5次,活性和选择性无明显变化,表明催化剂具有良好的活性及稳定性。

关键词：氧化镁金钯双金属苯甲醇氧化苯甲醛

Nd:YAG激光治疗后发性白内障的临床观察

在线全文

学校读者我要写书评

暂无评论

国际眼科杂志 2013年第2期13卷 361-362页

作者：杨天舒王伟杨煜生中国河南省南阳市眼科医院 473014

目的:探讨Nd:YAG激光治疗后发性白内障的临床效果。方法:后发性白内障患者203例224眼,经详细眼科检查,散瞳后,采用国产Nd:YAG激光(波长1064μm)进行激光治疗,激光瞄准光聚焦于后囊膜表面,环形切开后囊膜,切开直径约3～4mm。激光后定期... 详细信息

目的:探讨Nd:YAG激光治疗后发性白内障的临床效果。方法:后发性白内障患者203例224眼,经详细眼科检查,散瞳后,采用国产Nd:YAG激光(波长1064μm)进行激光治疗,激光瞄准光聚焦于后囊膜表面,环形切开后囊膜,切开直径约3～4mm。激光后定期复查。对治疗前后视力,采用SPSS11.0统计软件进行统计分析比较。结果:本组患者均为一次性激光切开成功,成功率为100%;视力均获提高,经统计学处理,治疗前后视力有显著性差异(P<0.01)。结论:Nd:YAG激光是治疗后发性白内障安全有效的方法。

关键词：后发性白内障 Nd YAG激光后囊切开术

在线全文

学校读者我要写书评

暂无评论

基于相似理论的快堆氩气空间温度场实验研究

核科学与工程 2016年第4期36卷 465-469页

作者：吴强张东辉李天舒申凤阳中国原子能科学研究院快堆研究设计所北京102413

本文在实验装置上研究了池式快堆主容器内氩气空间温度分布特性。实验结果表明,气体温度在封闭空间中间大部分区域维持一个相对恒定的温度,这是封闭空间内液面自然对流换热的固有特点。根据实验结果分析,提出了氩气空间高度和主容器冷... 详细信息

本文在实验装置上研究了池式快堆主容器内氩气空间温度分布特性。实验结果表明,气体温度在封闭空间中间大部分区域维持一个相对恒定的温度,这是封闭空间内液面自然对流换热的固有特点。根据实验结果分析,提出了氩气空间高度和主容器冷却系统设计应统筹考虑的设计思想,可用于优化池快堆主容器肩部设计,对大型快堆主容器冷却系统优化设计具有参考意义。

关键词：快堆氩气封闭空间自然对流

在线全文

学校读者我要写书评

暂无评论

干细胞的趋电性迁移及机制

中国组织工程研究 2025年第23期29卷 4984-4992页

作者：韩芳舒晴贾绍辉田峻武汉体育学院运动医学院湖北省武汉市430079 武汉大学中南医院骨科康复科湖北省武汉市430071

背景:随着对干细胞技术研究的深入,如何使其准确归巢成为临床应用中的一大难题。除药物和趋化因子等信号的诱导外,电场也被广泛应用于指导干细胞的定向迁移,并可增强其迁移速度和定向性。目的:旨在分析总结电场对干细胞迁移特性的影响,... 详细信息

背景:随着对干细胞技术研究的深入,如何使其准确归巢成为临床应用中的一大难题。除药物和趋化因子等信号的诱导外,电场也被广泛应用于指导干细胞的定向迁移,并可增强其迁移速度和定向性。目的:旨在分析总结电场对干细胞迁移特性的影响,同时综述可能的作用机制。方法:通过检索Pub Med和中国知网数据库,收集截至2024年3月的相关文献,英文检索词:“stem cells,direct current electric field,pulsed electric field,migration,electric field device,mechanism”;中文检索词:“干细胞,直流电场,脉冲电场,迁移,电场装置,机制”。排除不能获取全文和与主题无关的文献。结果与结论:根据筛选要求共纳入58篇文献,包括中文文献15篇及英文文献43篇。文献以脂肪间充质干细胞、骨髓间充质干细胞、神经干细胞、表皮干细胞、人胚胎干细胞和人诱导性多功能干细胞为研究对象,在迁移装置中研究电场的不同参数对上述干细胞迁移的影响及其机制。(1)电场作为一种简单、无创且稳定的干预方式在指导干细胞定向迁移的过程中起着积极作用;(2)不同类型的干细胞发生趋电性迁移的方向不同,同时大部分干细胞的迁移速度和定向性是随着电场强度增加而增加的;(3)不同的电场装置在观测干细胞迁移时的侧重点不同,可根据实验目的而择优选择相关装置;(4)不同干细胞趋电性迁移的机制不完全相同,多数干细胞迁移过程中有MAPK通路、ROCK活化以及PI3K功能的参与,同时还有其他蛋白质复合物与信号通路参与调控该过程;(5)除电场参数不同之外,细胞本身的衰老情况和培养环境也会对趋电性迁移的结果产生影响。总而言之,电场作为一种影响干细胞迁移特性的重要信号,与其他新兴材料结合在组织工程应用中展现出了一定的潜力,有望在指导干细胞归巢方面发挥更加重要的作用,促进骨组织再生和修复以及神经系统、自身免疫系统以及肿瘤等疾病的研究取得更大的突破。

关键词：干细胞电场趋电性迁移机制归巢效应物理因子电场装置细胞衰老培养环境

Controlling Chaos and Bifurcation by a Delayed Nonlinear Feedback

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1996年第5期13卷 333-336页

作者： yang Shi-ping tian Gang XU shu-shan Department of Physics Hebei Teachers'CollegeShijiazhuang 050091

A method for stabilizing unstable periodic orbits(UPO)embedded in a chaotic attractor is *** conditions for controlling chaof and bifurcation through feeding back a delayed discrete rariable are *** feedback procedure is applicable without knowing a priori the location and the periodicity of the *** method can be applied not only to the chaotic attractor but also to the situation of bifurcation.

关键词： attractor chaotic Bifurcation

An overview of biofuel power generation on policies and finance environment,applied biofuels,device and performance

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

Journal of Traffic and Transportation Engineering(English Edition) 2021年第4期8卷 534-553页

作者： yang yang Zhilin tian Yuanfeng Lan shu Wang Hao Chen School of Automobile Chang'an UniversityXi'an 710064China ETEC Department&MOBI Research Group Vrije Universiteit BrusselBrussel 1050Belgium

The prices of fossil fuels,the gap between energy supply and demand,energy security,environmental issues,and the reduction of greenhouse gas emissions commonly promote the development of biomass power generation in *** to direct biomass combustion power generation and biogas power generation,liquid biofuel power generation has better application *** and finance environment of countries and organizations have promoted the extensive application of biofuel power generation in recent years,especially in *** of internal combustion engine,gas turbine and fuel cell on the stationary power station and mobile generation shows that gas turbine is the main generator-set,the fuel cell is the fastest-growing and future generator-set,while the engine is the first choice in transport and low power generation *** the second,third and fourth generation biofuels,biomethanol,bioethanol,biodiesel and others have been researched and widely used in power *** addition,power generation performance and emissions have been improved to some extent after biofuels *** the future,combined heat and power(CHP)generation and integrated gasification combined cycle(IGCC)is imperative development trends of power generation for higher energy and exergy *** based on the various generating facilities will be the next choice and direction of energy use trends for transport.

关键词： Biofuel Biomass liquid fuel Power generation Emission

Cyclic oxidation behavior of Ni_(3)Al-based single crystal alloy IC21

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第5期42卷 1656-1662页

作者： tian-tian yang Xin Zhou shu-Suo Li Yan-Ling Pei Sheng-Kai Gong School of Materials Science and Engineering Beihang UniversityBeijing100191China

In this study,the cyclic oxidation tests of the Ni3Al-based single-crystal super alloy IC21 were carried out at 800,900,950,1000,1050 and 1100℃in *** present study shows that the complex oxide scale on the surface of the alloy is made up of an outer columnar NiO layer,an intermediate mixture of NiO and NiAl2O4layer with a small amount of Mo oxides and an inner continuous layer ofα-Al_(2)O_(3).The cyclic oxidation kinetics curves show that oxidation resistance at 800,900,950,1000 and1050℃seems to follow a similar law and is better than that at 1100℃.The overall weight changes at 1100℃follows a parabolic *** and severe rumpling of the oxide scale are observed on the surface of the alloy at1100℃,revealing the occurrence of disastrous oxidation.

关键词： Ni_(3)Al Thermal cycling Oxidation Microstructure

Dark Solitons in FPU Lattice Chain

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第5X期48卷 917-920页

作者： WANG Deng-Long yang Ru-shu yang You-tian Department of Physics and Key Laboratory of Low Dimensional Education Xiangtan University Xiangtan 411105 China Department of Electric Engineering Hunan University of Arts and Materials & Application Technology of Ministry of Science Changde 415000 China

Based on multiple scales method, we study the nonlinear properties of a new Fermi-Pasta-Ulam lattice model analytically. It is found that the lattice chain exhibits a novel nonlinear elementary excitation, i.e. a dark... 详细信息

关键词： FPU lattice chain a dark soliton the multiple-scale method