检索结果-南通市图书馆

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丙烯酰乙二胺盐酸盐的合成

合成化学 2009年第1期17卷 130-131页

作者：高钧丁运生张涛罗明灯刘洋合肥工业大学化学工程学院安徽合肥230009

丙烯酰氯与Boc单保护的乙二胺反应,合成了功能单体——丙烯酰乙二胺盐酸盐,总收率65%,其结构经1H NMR和IR表征。

关键词：丙烯酰氯乙二胺丙烯酰乙二胺盐酸盐合成

基于电磁谐振分离的宽带低雷达截面超材料吸波体

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物理学报 2013年第21期62卷 126-133页

作者：杨欢欢曹祥玉高军刘涛李思佳赵一袁子东张浩空军工程大学信息与导航学院西安710077

基于超材料的电磁谐振特性,设计、制作了一种极化无关的宽带低雷达散射截面(radar cross section,RCS)超材料吸波体.通过场分布和反演法分析了其吸波机理,利用波导法和空间波法测试了其吸波率和RCS特性.理论分析表明:在平面波的作用下,... 详细信息

基于超材料的电磁谐振特性,设计、制作了一种极化无关的宽带低雷达散射截面(radar cross section,RCS)超材料吸波体.通过场分布和反演法分析了其吸波机理,利用波导法和空间波法测试了其吸波率和RCS特性.理论分析表明:在平面波的作用下,该吸波体对某一吸波频率在不同的位置分别提供电谐振和磁谐振,对不同的吸波频率,利用不同的介质层提供主要的能量损耗,从而有效减弱了电磁耦合,保证了宽频带的强吸收特性.实验结果表明:设计的三层结构吸波体吸波率达90%以上的带宽是单层结构的4.25倍,RCS减缩10 dB以上的带宽为5.1%,其单元尺寸为0.17λ,厚度仅为0.015λ.该吸波体的低RCS特性还具有极化无关、宽入射角的特点,且通过改变吸波体的夹层结构可以实现工作带宽的灵活调节.

关键词：超材料吸波体雷达散射截面宽带电磁谐振

黄芪注射液对脑缺血/再灌注大鼠海马组织JNK-3表达的影响

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中国药理学通报 2012年第5期28卷 665-670页

作者：刘莎莎高维娟钱涛张霞承德医学院病理生理学教研室河北承德067000 河北化工医药职业技术学院河北石家庄050026

目的观察黄芪注射液对脑缺血/再灌注大鼠海马组织JNK3蛋白及其mRNA表达的影响。方法采用4VO法制备脑缺血/再灌注大鼠模型。设假手术组、模型组、黄芪注射液组和黄芪注射液溶剂对照组。除假手术组外,其余各组缺血30 min后再灌注,根据再... 详细信息

目的观察黄芪注射液对脑缺血/再灌注大鼠海马组织JNK3蛋白及其mRNA表达的影响。方法采用4VO法制备脑缺血/再灌注大鼠模型。设假手术组、模型组、黄芪注射液组和黄芪注射液溶剂对照组。除假手术组外,其余各组缺血30 min后再灌注,根据再灌注不同时间点再分为0、0.5、2、6、24、72和120 h 7个亚组。黄芪注射液组于缺血前30 min腹腔注射黄芪注射液[12 g(生药)·kg-1],其中24、72、120 h组手术后每隔24 h追加给药1次,黄芪注射液溶剂对照组腹腔注射与黄芪注射液等量的无菌去离子水。分别采用HE染色观察组织形态学变化;免疫组织化学法和Western blot法检测大鼠海马组织JNK3蛋白表达的变化;RT-PCR方法检测海马组织JNK3 mRNA的表达。结果 HE染色结果显示黄芪注射液可改善脑缺血/再灌注造成的大鼠海马神经元损伤;除120 h外,模型组各时间点海马组织JNK3蛋白及mRNA表达均较假手术组增加(P0.05)。结论黄芪注射液可抑制脑缺血/再灌注大鼠海马组织JNK3蛋白及其mRNA表达,从而抑制脑缺血/再灌注引起的大鼠海马神经元凋亡。

关键词：脑缺血/再灌注黄芪注射液 c-jun氨基末端激酶海马细胞凋亡大鼠

环带微结构离焦镜控制青少年近视进展的真实世界研究

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玻璃搪瓷与眼镜 2024年第5期52卷 1-8页

作者：颜月杨天宇田彧杜芬杨莹莹陈茹茹刁凯王峻峰陶祥臣杨积文卜立敏刘建军费亚谢慧敏漆文萍张扬李军魏文葛金玲李峻高向红白莹马庆凯郑婕王鑫张彦坤张文亚王伟娟吴纲跃周沛李永恩董傲婷詹绒珍刘妮汪超吉炳闯刘亚芹王宇王欣李海波张婵娟薛维娜吴玉玲吴琼刘陇黔四川大学华西医院成都610044 湖南省儿童医院长沙410007 温州医科大学附属眼视光医院温州325027 山东省立医院济南250021 辽宁爱尔眼科医院沈阳110055 苏州理想眼科医院苏州215021 包头朝聚眼科医院包头014016 昆明医科大学第一附属医院昆明650032 西安市第一医院西安710002 陕西省眼科研究所青少年近视眼防治中心西安710004 济南明水眼科医院济南250299 四平市中心人民医院四平136099 延安大学附属医院延安716099 成都市第六人民医院成都610051 安徽医科大学第一附属医院眼部疾病国家临床研究中心安徽省分中心合肥230000 河北省眼科医院石家庄眼科医疗部石家庄050035 河北省胸科医院石家庄050047 西安市华山中心医院西安710043 天津医科大学总医院滨海医院天津300480 金华眼科医院金华321099 定州市中医医院定州073099 西电集团医院西安710077 东莞市人民医院东莞523058 西安交通大学第二附属医院西安710004 黄梅县人民医院视光中心黄冈435505 天津市北辰医院天津300134 武汉市第九人民医院视光中心武汉430034 蕲春县人民医院视光中心黄冈435399 渭南市第二医院渭南市眼科医院渭南714024 盘锦润视儿童眼科医院盘锦124010 长春一诺眼科医院长春130028

通过大样本量的真实世界研究,对照普通单光镜,利用倾向性评分匹配控制混杂偏倚,通过睫状肌麻痹客观验光屈光度的变化量和眼轴增长量评价环带微结构离焦框架镜——普诺瞳离焦镜在现实临床应用场景下延缓或控制青少年近视的效果。阶段性6... 详细信息

通过大样本量的真实世界研究,对照普通单光镜,利用倾向性评分匹配控制混杂偏倚,通过睫状肌麻痹客观验光屈光度的变化量和眼轴增长量评价环带微结构离焦框架镜——普诺瞳离焦镜在现实临床应用场景下延缓或控制青少年近视的效果。阶段性6个月随访结果显示,普诺瞳离焦镜延缓屈光度进展总有效率为54.9%,延缓眼轴增长总有效率为63.4%,可有效延缓或控制近视进展。

关键词：离焦镜等效球镜眼轴近视防控真实世界研究

维普期刊数据库博看期刊

Chemoprophylaxis, diagnosis, treatments, and discharge management of COVID-19: An evidence-based clinical practice guideline(updated version)

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Military Medical Research 2020年第3期7卷 249-282页

作者： Ying-Hui Jin Qing-Yuan Zhan Zhi-Yong Peng Xue-Qun Ren Xun-tao Yin Lin Cai Yu-Feng Yuan Ji-Rong Yue Xiao-Chun zhang Qi-Wen Yang Jianguang Ji Jian Xia Yi-Rong Li Fu-Xiang Zhou Ya-Dong gao Zhui Yu Feng Xu Ming-Li Tu Li-Ming Tan Min Yang Fang Chen Xiao-Ju zhang Mei Zeng Yu Zhu Xin-Can liu Jian Yang Dong-Chi Zhao Yu-Feng Ding Ning Hou Fu-Bing Wang Hao Chen Yong-Gang zhang Wei Li Wen Chen Yue-Xian Shi Xiu-Zhi Yang Xue-jun Wang Yan-jun Zhong Ming-Juan Zhao Bing-Hui Li Lin-Lu Ma Hao Zi Na Wang Yun-Yun Wang Shao-Fu Yu Lu-Yao Li Qiao Huang Hong Weng Xiang-Ying Ren Li-Sha Luo Man-Ru Fan Di Huang Hong-Yang Xue Lin-Xin Yu Jin-Ping gao Tong Deng Xian-tao Zeng Hong-jun Li Zhen-Shun Cheng Xiao-Mei Yao Xing-Huan Wang Center for Evidence-Based and Translational Medicine Zhongnan Hospital of Wuhan UniversityWuhan 430071China National Clinical Research Center for Respiratory Diseases China-Japan Friendship HospitalBeijing 100029China Department of Pulmonary and Critical Care Medicine China-Japan Friendship HospitalBeijing 10029China Leishenshan Hospital in Wuhan Wuhan 430200China Department of Critical Care Medicine Zhongnan Hospital of Wuhan UniversityWuhan 430071China Institutes of Evidence-based Medicine and Knowledge Translation Henan UniversityKaifeng 475000HenanChina Department of Medical Imaging Guizhou Provincial People’s HospitalGuiyang 550002China Departments of Orthopedics Zhongnan Hospital of Wuhan UniversityWuhan 430071China Department of Hepatobiliary Surgery Zhongnan Hospital of Wuhan UniversityWuhan 430071China National Clinical Research Center for Geriatrics West China Hospital of Sichuan UniversityChengdu 610041China Department of Geriatrics West China Hospital of Sichuan UniversityChengdu 610041China Department of Radiology Zhongnan Hospital of Wuhan UniversityWuhan 430071China Department of Clinical Laboratory Peking Union Medical College Hospital(PUMCH)Peking Union Medical CollegeChinese Academy of Medical Sciences(CAMS)Beijing 100730China Center for Primary Health Care Research Lund University and Region Skåne25002 MalmöSweden Emergency Center Zhongnan Hospital of Wuhan UniversityWuhan 403371China Department of Allergology Zhongnan Hospital of Wuhan UniversityWuhan 430071China Department of Radiation and Medical Oncology Zhongnan Hospital of Wuhan UniversityWuhan 43071China Department of Critical Care Medicine Renmin Hospital of Wuhan UniversityWuhan 430060China Department of Emergency Medicine and Chest Pain Center Qilu Hospital of Shandong UniversityJinan 250002China Department of Respiratory and Critical Care Medicine Suizhou Central HospitalHubei University of MedicineSuizhou 441300HubeiChina Department of Clinic Pharmacy Second People’s Hospital of Huaihua Ci

The novel severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)is the cause of a rapidly spreading illness,coronavirus disease 2019(COVID-19),affecting more than seventeen million people around the *** and treatment guidelines for clinicians caring for patients are *** the early stage,we have issued"A rapid advice guideline for the diagnosis and treatment of 2019 novel coronavirus(2019-nCoV)infected pneumonia(standard version)";now there are many direct evidences emerged and may change some of previous recommendations and it is ripe for develop an evidence-based *** formed a working group of clinical experts and *** steering group members proposed 29 questions that are relevant to the management of COVID-19 covering the following areas:chemoprophylaxis,diagnosis,treatments,and discharge *** searched the literature for direct evidence on the management of COVID-19,and assessed its certainty generated recommendations using the Grading of Recommendations,Assessment,Development and Evaluation(GRADE)*** were either strong or weak,or in the form of ungraded consensus-based ***,we issued 34 *** them,6 were strong recommendations for,14 were weak recommendations for,3 were weak recommendations against and 11 were ungraded consensus-based *** covered topics of chemoprophylaxis(including agents and Traditional Chinese Medicine(TCM)agents),diagnosis(including clinical manifestations,reverse transcription-polymerase chain reaction(RT-PCR),respiratory tract specimens,IgM and IgG antibody tests,chest computed tomography,chest X-ray,and CT features of asymptomatic infections),treatments(including lopinavirritonavir,umifenovir,favipiravir,interferon,remdesivir,combination of antiviral drugs,hydroxychloroquine/chloroquine,interleukin-6 inhibitors,interleukin-1 inhibitors,glucocorticoid,qingfei paidu decoction,lianhua qingwen granules/capsules,convalescent plasma,lung

关键词： COVID-19 SARS-CoV-2 Recommendation Chemoprophylaxis Diagnosis Treatment Discharge management Traditional Chinese medicine guideline

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冠状动脉旁路移植术后二次开胸止血67例

中华胸心血管外科杂志 2012年第6期28卷 356-358页

作者：高杰刘岩苏丕雄张希涛颜钧顾松首都医科大学附属北京朝阳医院心外科 100020

目的探讨冠状动脉旁路移植术（CABG）术后二次开胸止血的相关危险因素及出血的常见部位。方法2000年1月至2011年7月期间行CABG术2765例，发生二次开胸止血67例（占2．4％），对相关危险因素进行单因素分析并总结常见的出血部位。结果应... 详细信息

目的探讨冠状动脉旁路移植术（CABG）术后二次开胸止血的相关危险因素及出血的常见部位。方法2000年1月至2011年7月期间行CABG术2765例，发生二次开胸止血67例（占2．4％），对相关危险因素进行单因素分析并总结常见的出血部位。结果应用乳内动脉、术前停用抗血小板药物〈5天、合并有高血压、CABG＋其他手术、年龄〉70岁等，是引起术后二次开胸止血的危险因素（P〈0．05）。与是否体外循环下冠状动脉旁路移植、IABP的应用、合并糖尿病、旁路移植的支数无相关性（P〉0．05）。48例出血部位明确，依次是：乳内动脉及其创面、静脉旁路血管、胸骨、升主动脉插管口、胸腺窝、膈肌切口、钢丝孔。结论术前充分准备、尽可能避免相关危险因素、术中止血操作仔细，可减少术后出血的发生。

关键词：冠状动脉旁路移植术手术后出血危险因素

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基于光纤的光学频率传递研究

物理学报 2015年第12期64卷 106-114页

作者：刘杰高静许冠军焦东东闫露露董瑞芳姜海峰刘涛张首刚中国科学院国家授时中心西安710600 中国科学院大学北京100039 中国科学院时间频率基准重点实验室西安710600

随着光钟研究的发展,光钟的稳定度和不确定度均达到10-18量级.通过光纤可以实现光钟频率信号的高精度传输,有望用于未来"秒"定义的复现.演示了百公里级实验室光纤上的光学频率传递.对于在实验室70 km光纤盘上实现的光频传递,光纤相位噪... 详细信息

随着光钟研究的发展,光钟的稳定度和不确定度均达到10-18量级.通过光纤可以实现光钟频率信号的高精度传输,有望用于未来"秒"定义的复现.演示了百公里级实验室光纤上的光学频率传递.对于在实验室70 km光纤盘上实现的光频传递,光纤相位噪声抑制在1—250 Hz傅里叶频率范围内均接近于光纤延时极限,对应传输稳定度(Allan偏差)为秒级稳定度1.2×10-15,10000 s稳定度为1.4×10-18.实验室100 km光纤的光频传递秒级稳定度也达到了5×10-15.提出了光纤噪声用户端补偿的方案,可以简化星形传递网络中心站的复杂度.在25 km光纤上演示了该传递方案,实现的传输稳定度接近传统前置补偿传递方案.

关键词：时间频率光纤网络光学频率传递光纤噪声用户端补偿

A joint call for actions to advance taxonomy in China

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Zoological Systematics 2022年第3期47卷 188-197页

作者： Chaodong Zhu Arong Luo Ming Bai Michael COrr Zhonge Hou Siqin Ge jun Chen Yibo Hu Xuming Zhou Gexia Qiao Hongzhi Kong Limin Lu Xiaohua Jin Lei Cai Xinli Wei Ruilin Zhao Wei Miao Qingfeng Wang Zhongli Sha Qiang Lin Meng Qu Jianping Jiang Jiatang Li Jing Che Xuelong Jiang Xiaoyong Chen Lianming gao Zongxin Ren Chunlei Xiang Shixiao Luo Donghui Wu Dong liu Yanqiong Peng tao Su Chenyang Cai Tianqi Zhu Wanzhi Cai Xingyue liu Hu Li Huaijun Xue Zhen Ye Xuexin Chen Pu Tang Shujun Wei Hong Pang Qiang Xie Feng zhang Feng zhang Xianjin Peng Aibing zhang Taiping gao Changfa Zhou Chen Shao Libin Ma Zhaoming Wei Yunxia Luan Ziwei Yin Wu Dai Cong Wei Xiaolei Huang Jingxian liu Xiangsheng Chen Tianci Yi Zhisheng zhang Zhulidezi Aishan Qin Li Hongying Hu CAS Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China State Key Laboratory of Mycology(SKLM) Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Aquatic Biodiversity and Conservation Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China Wuhan Botanical Garden Chinese Academy of SciencesWuhan 430074China Department of Marine Organism Taxonomy&Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China State Key Laboratory of Genetic Resources and Evolution&Yunnan Key Laboratory of Biodiversity and Ecological Security of gaoligong Mountain Kunming Institute of ZoologyChinese Academy of SciencesKunming 650221China CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China CAS Key Laboratory of Plant Resource Conservation and Sustainable Utilization South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China CAS Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMenglaYunnan 66630

Taxonomy plays an important role in understanding the origin, evolution, and ecological functionality of biodiversity. There are large number of unknown species yet to be described by taxonomists, which together with their ecosystem services cannot be effectively protected prior to description. Despite this, taxonomy has been increasingly underrated insufficient funds and permanent positions to retain young talents. Further, the impact factordriven evaluation systems in China exacerbate this downward trend, so alternative evaluation metrics are urgently necessary. When the current generation of outstanding taxonomists retires,there will be too few remaining taxonomists left to train the next generation. In light of these challenges, all co-authors worked together on this paper to analyze the current situation of taxonomy and put out a joint call for immediate actions to advance taxonomy in China.

关键词： Endangered taxonomists morphology-based taxonomy integrative taxonomy capacity building systematics

四川盆地二叠系不同类型烃源岩生烃热模拟实验

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天然气地球科学 2010年第5期21卷 700-704页

作者：刘全有金之钧高波张殿伟陶冶中国石油化工股份有限公司石油勘探开发研究院北京100083

通过对四川盆地二叠系不同类型烃源岩(泥质灰岩、沥青灰岩、泥岩和煤)在加水封闭体系下的热模拟实验,结果表明不同类型干酪根之间产气率明显不同。Ⅰ型干酪根的泥质灰岩总产气率最高(4226m3/tTOC),其次为沥青灰岩(2 445.5 m3/tTOC),煤... 详细信息

通过对四川盆地二叠系不同类型烃源岩(泥质灰岩、沥青灰岩、泥岩和煤)在加水封闭体系下的热模拟实验,结果表明不同类型干酪根之间产气率明显不同。Ⅰ型干酪根的泥质灰岩总产气率最高(4226m3/tTOC),其次为沥青灰岩(2 445.5 m3/tTOC),煤岩总产气率最低(459.3 m3/tTOC),Ⅲ型干酪根的泥岩总产气率高于煤岩。泥质灰岩烃类气体产率仍然最高(765 m3/tTOC),其次为泥岩(606.1 m3/tTOC),沥青灰岩最低。泥岩烃类气体产率高于沥青灰岩,可能与沥青灰岩中除去烃类遭受热裂解外,碳酸盐分解生成大量非烃气体(CO2)有关,从而造成总产气率高,而烃类气体产率却偏低的现象。这样,沥青灰岩生成的烃类主要来源于分散有机质热裂解,而不是灰岩本身。不同类型气源生烃对比结果表明,Ⅰ型干酪根的泥质灰岩或Ⅲ型干酪根的泥岩有利于低温生烃,而煤岩和分散有机质生烃历程长,有利于后期天然气生成与聚集保存。

关键词：四川盆地二叠系烃源岩热模拟实验生烃潜力