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干旱下植物根系分泌物及其介导的根际激发效应研究进展

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植物生态学报 2024年第7期48卷 817-827页

作者：龙吉兰蒋铮刘定琴缪宇轩周灵燕冯颖裴佳宁刘瑞强周旭辉伏玉玲华东师范大学生态与环境科学学院浙江天童森林生态系统国家野外科学观测研究站上海200241 上海市农业科学院生态环境保护研究所上海201403 东北林业大学林学院哈尔滨150040

根系分泌物是植物与土壤进行物质能量交换和信息传递的重要媒介,同时也是植物响应外界环境变化的主要形式,在土壤碳库动态中发挥着重要作用。伴随着全球气候变化而频繁发生的极端干旱事件对植物地上地下生长过程都产生了深刻的影响,然而... 详细信息

根系分泌物是植物与土壤进行物质能量交换和信息传递的重要媒介,同时也是植物响应外界环境变化的主要形式,在土壤碳库动态中发挥着重要作用。伴随着全球气候变化而频繁发生的极端干旱事件对植物地上地下生长过程都产生了深刻的影响,然而,由于根-土界面交互作用的复杂性,以及根系分泌物收集手段与装置的不完善,人们对干旱条件下根系分泌物及其介导的根际激发效应的响应及机制的认知尚存在较大的局限性。基于此,该文结合国内外生态学领域的研究前沿动态,论述了干旱下植物根系分泌物数量及组分的动态变化,重点阐述了根系分泌物介导的根际激发效应及其机制,在此基础上展望了未来根系分泌物研究中的重点关注方向,以期为未来全球气候变化条件下土壤碳汇的评估提供科学依据。

关键词：干旱胁迫根系分泌物根际激发效应土壤微生物土壤养分

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预制拼装桥梁UHPC横向连接技术研究

中国市政工程 2024年第4期 16-21,31,149页

作者：曹全付秦凤江姜瑞娟罗新才尹光亮崔燕广东省南粤交通投资建设有限公司广东广州510623 重庆大学土木工程学院重庆400044 深圳市市政设计研究院有限公司广东深圳518029

以广东省湛江市湛江环城高速南三岛大桥工程为依托,设计并开展了5组基于不同钢筋搭接形式和搭接长度的普通混凝土预制小箱梁横向湿接缝纯弯试验,给出了适用于该项目的超高性能混凝土(UHPC)横向湿接缝构造方案。试验结果表明:钢筋搭接长... 详细信息

以广东省湛江市湛江环城高速南三岛大桥工程为依托,设计并开展了5组基于不同钢筋搭接形式和搭接长度的普通混凝土预制小箱梁横向湿接缝纯弯试验,给出了适用于该项目的超高性能混凝土(UHPC)横向湿接缝构造方案。试验结果表明:钢筋搭接长度和搭接形式对桥面板开裂荷载影响小;搭接长度不小于6倍钢筋直径时,可为直径16 mm的U形钢筋在UHPC横向湿接缝中提供足够的锚固能力,此时湿接缝内纵向钢筋屈服后应变得到充分发展,试件破坏模式为纯弯段普通混凝土压碎的延性破坏,试件强度和延性满足实际工程需求;而湿接缝内横向钢筋的应变小于350με,其布设对提高试件承载力的作用有限。此外,基于UHPC的横向湿接缝大幅缩短了钢筋搭接长度和湿接缝宽度,有助于提升桥梁的受力性能和耐久性。

关键词：预制拼装桥梁超高性能混凝土横向湿接缝连接性能

Resatorvid protects against hypoxic-ischemic brain damage in neonatal rats

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Neural Regeneration Research 2020年第7期15卷 1316-1325页

作者： Li-Jun jiang Zhen-Xing Xu Ming-fu Wu Gai-qin Dong Li-Li Zhang Jun-Yan Gao Chen-Xi feng Xing feng Department of Neonatology Children's Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina Department of Neonatology Affiliated Hospital of Yangzhou UniversityYangzhouJiangsu ProvinceChina

Secondary brain damage caused by hyperactivation of autophagy and inflammatory responses in neurons plays an important role in hypoxic-ischemic brain damage(HIBD).Although previous studies have implicated Toll-like receptor 4(TLR4)and nuclear factor kappa-B(NF-κB)in the neuroinflammatory response elicited by brain injury,the role and mechanisms of the TLR4-mediated autophagy signaling pathway in neonatal HIBD are still *** hypothesized that this pathway can regulate brain damage by modulating neuron autophagy and neuroinflammation in neonatal rats with ***,we established a neonatal HIBD rat model using the Rice-Vannucci method,and injected 0.75,1.5,or 3 mg/kg of the TLR4 inhibitor resatorvid(TAK-242)30 minutes after hypoxic *** results indicate that administering TAK-242 to neonatal rats after HIBD could significantly reduce the infarct volume and the extent of cerebral edema,alleviate neuronal damage and neurobehavioral impairment,and decrease the expression levels of TLR4,phospho-NF-κB p65,Beclin-1,microtubule-associated protein l light chain 3,tumor necrosis factor-α,and interleukin-1βin the ***,TAK-242 appears to exert a neuroprotective effect after HIBD by inhibiting activation of autophagy and the release of inflammatory cytokines via inhibition of the TLR4/NF-κB signaling *** study was approved by the Laboratory Animal Ethics Committee of Affiliated Hospital of Yangzhou University,China(approval No.20180114-15)on January 14,2018.

关键词： autophagy hypoxic-ischemic brain damage neonatal hypoxic-ischemic brain damage neuroinflammation nuclear factor kappa-B resatorvid TAK-242 Toll-like receptor 4

Evaluation of Improved Ultrasonic Nebulizer for Miniature Simultaneous Microwave Plasma Torch Spectrometer

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Chemical Research in Chinese Universities 2006年第3期22卷 297-301页

作者： feng Guo-dong jiang Jie HUAN Yan-fu ZHENG Jian LI Ming CAO Yan-bo JIN qin-han YU Ai-min Department of Analytical Chemistry College of Chemistry Jilin University Changchun 130021 P. R. China

A new automatic sample solution introduction system for miniature simultaneous microwave plasma torch（MPT） atomic emission spectrometer was developed. The operating parameters were optimized. The detection limits of the spectrometer with an ultrasonic nebulizer for Ag, Al, Ba, Ca, Cr, Cu, Fe, Mg, Mn, Sr, and V are 5-10 times lower than those obtained with a pneumatic nebulizer and are also lower than those obtained by a Model JX-lOlO MPT spectrometer. Two practical samples were analyzed to test the reliability and sensitivity of the system.

关键词： Microwave plasma torch Miniature simultaneous spectrometer Ultrasonic nebulizer Automatic introduction system

Study of Spectral Character of Alkali Metals Using Microwave Plasma Torch Simultaneous Spectrometer

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Chemical Research in Chinese Universities 2006年第6期22卷 703-707页

作者： feng Guo-dong WAN Yi HUAN Yan-fu jiang jie LI Ming CAO Yan-bo YU Ai-min JIN qin-han Institute of Miniature Analytical Instrumentation College of Chemistry Jilin University Jilin Province Research Center for Engineering and Technology of Spectral Instruments Changchun 130023 P. R. China

A microwave plasma torch （MPT） simultaneous spectrometer was used to study the spectral character and the matrix effect on alkali metal ions in solution. The main parameters were optimized. The microwave forward power was 100 W. The argon flow rate that was used to sustain the Ar-MPT included the flow rate of carrier gas and the flow rate of support gas, which were 0. 8 and 1.0 L/min, respectively. The HC1 concentration in the solution was 0.02 mol/L. The observation height was 9. 0 ram. The detection limits of Li, Na, K, Rb, and Cs were 0. 0003, 0. 0004, 0. 009, 0.07 and 2.4 mg/L, respectively, and the resuhs obtained by the Ar-MPT were compared with those obtained by argon inductively coupled plasma（Ar-ICP） and argon microwave induced plasma（Ar-MIP）. The interference effects of several matrix elements were also studied.

关键词： Alkali metals Microwave plasma torch Simultaneous spectrometer Matrix effects

核型分析、BoBs、CNV和Y染色体AZF微缺失检测在羊水染色体鉴定中的应用

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锦州医科大学学报 2024年第1期45卷 68-75页

作者：王玉萍付夏宁园园于倩李琴江峰武其文皖南医学院第一附属医院(弋矶山医院)检验科皖南医学院第一附属医院(弋矶山医院)产前诊断皖南医学院第一附属医院(弋矶山医院)超声科安徽芜湖241001

目的探讨染色体核型分析、细菌人工染色体标记-微球鉴别/分离法(bacterial artificial chromosome on beads,BoBs)、基因拷贝数目变异检测(copy number variations,CNV)和Y染色体无精子症因子(azoospermia factor,AZF)微缺失联合检测在孕妇羊水染色体鉴定中的应用价值。方法选取2021年7月至2022年12月于皖南医学院第一附属医院(弋矶山医院)产前诊断中心就诊中符合产前诊断指征的孕妇507例,抽取孕16~25 w羊水,分别进行细胞培养染色体核型分析,提取DNA进行BoBs检测,对其中1例21-三体综合征和1例标记染色体进行CNV验证,2例Y染色体进行AZF微缺失验证,统计结果。结果507例羊水穿刺指征统计,以唐筛高风险占比最高,达39.1%(198/507);NIPT高风险组仅占总检查孕妇的14.0%(71/507),但核型分析和BoBs异常结果占比最高,分别占全部异常结果的40.3%(23/57)和47.7%(21/44)。507例羊水标本一共检出异常结果59例(11.6%),其中染色体核型分析检出异常57例(11.2%),常染色体数目异常26例(5.1%),常染色体结构异常14例(2.8%);性染色体数目异常13例(2.6%),性染色体结构异常4例(0.7%)。BoBs检出异常44例(8.7%),其中常染色体数目异常26例(5.1%),性染色体数目异常14例(2.8%),性染色体部分缺失2例(0.4%),检出46,XN,22q11重复2例(0.4%)。BoBs与核型分析结果比对,常染色体和性染色体数目异常结果符合率分别为100.0%和99.8%。另外BoBs将其中1例46,X,del(Y)(q11)判读为45,XO,1例47,XN,+mar[50]/46,XN[10]判读为46,XN,其余染色体结构异常不在BoBs检测范围。CNV验证致病性拷贝数变异1例,临床意义未明拷贝数变异1例;Y染色体AZF微缺失验证2例Y染色体为SRY+,存在AZFb+c缺失。结论羊水染色体核型分析能够发现染色体数目和结构异常核型,对于未知来源的标记染色体和<10 Mb的微缺失/微重复缺乏优势。BoBs对于常染色体数目检测和微缺失/微重复检测具有优势,能提示性染色体片段缺失,但要注意对性染色体的误判,常染色体结构异常不在BoBs检测范围。CNV对于全基因组微缺失和微重复检测具有优势。Y染色体AZF微缺失检测可对Y染色体进行验证。联合应用上述检测技术,能对羊水染色体数目和结构异常提供多方位诊断,值得推广应用。

关键词：染色体核型分析 BoBs CNV Y染色体AZF微缺失检测羊水

Transjugular intrahepatic portosystemic shunt for pyrrolizidine alkaloid-related hepatic sinusoidal obstruction syndrome

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World Journal of Gastroenterology 2020年第24期26卷 3472-3483页

作者： Chun-Ze Zhou Rui-feng Wang Wei-fu Lv Yu-qin fu De-Lei Cheng Yi-jiang Zhu Chang-Long Hou Xian-Jun Ye Interventional Radiology Medical College of Shandong UniversityJinan 250021Shandong ProvinceChina Interventional Radiology Department The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Nephrology The Second HospitalCheeloo College of MedicineShandong UniversityJinan 250033Shandong ProvinceChina Department of Ultrasound The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina

BACKGROUND Treatments for hepatic sinusoidal obstruction syndrome(HSOS)are *** To evaluate transjugular intrahepatic portosystemic shunting(TIPS)as a treatment for pyrrolidine alkaloid-related HSOS(PA-HSOS).METHODS This retrospective analysis included patients with PA-HSOS admitted to the First Affiliated Hospital of the University of Science and technology of China(June 2015 to January 2019).Baseline clinical characteristics and follow-up data were extracted from the medical *** patients included in this study experienced failure of initial *** were divided into the TIPS and conservative treatment groups according to the therapy they *** function,maximal ascites depth,imaging characteristics,pathology findings,and survival were compared between *** The TIPS group included 37 patients(28 males),and the conservative treatment group included 17 patients(11 males).Baseline characteristics were similar between *** were two deaths in the TIPS group and seven deaths in the conservative treatment group during follow-up(3-48 mo).The 3-,6-,12-and 24-mo survival rates were 94.6%,94.6%,94.6%and 94.6%,respectively,in the TIPS group and 70.6%,57.8%,57.8%and 57.8%,respectively,in the conservative treatment ***-Meier analysis revealed significantly longer survival for the TIPS group than for the conservative treatment group(P=0.001).Compared with the pre-treatment value,maximal ascites depth was significantly lower at 1 wk,2 wk,1 mo,and 3 mo for the TIPS group(all Pted tomography demonstrated the disappearance of patchy liver enhancement after *** showed that liver congestion and hepatocyte swelling improved with time after TIPS *** TIPS may achieve better outcomes than conventional symptomatic treatment in patients with PA-HSOS.

关键词： Transjugular intrahepatic portosystemic shunt Sinusoidal obstruction syndrome Pyrrolizidine alkaloids Survival Ascites

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木塑复合材料增韧的研究

塑料工业 2007年第B6期35卷 137-140页

作者：姜锋秦特夫中国林业科学研究院木材工业研究所北京100091

综述了弹性体、纳米材料和短纤维增韧木塑复合材料的研究进展,讨论了其提高塑料冲击强度的机理和效果,展望了了增韧木塑复合材料的发展前景。

关键词：木塑复合材料韧性冲击强度弹性体纳米材料木纤维

Effects of PM2.5 Exposure in Different Air Quality Grades on Daily Outpatient Visits for Childhood Asthma in Shijiazhuang, China

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Biomedical and Environmental Sciences 2018年第12期31卷 888-892页

作者： fu Gui qin jiang Yan feng LIU Lan Ping LIU Hua Yue ZHOU Ji CUI Xiao Wei WANG Shi Gong Hebei Provincial Meteorology Service Center and Key Laboratory for Meteorology and Ecological Environment Shijiazhuang 050021 Hebei China Shanghai Key Laboratory of Meteorology and Health Shanghai 200135 China State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development School of Life Sciences Fudan University Shanghai 200438 China Children's Hospital of Hebei Province Shijiazhuang 050021 Hebei China Laboratory of Sichuan Province for Plateau Atmosphere and Environment College of Atmospheric Sciences Chengdu University of Information Technology Chengdu 610225 Sichuan China

Asthma is a common chronic inflammatory disorder that is more prevalent in children than in *** has seen an increasing prevalence of childhood asthma in recentdecades[1].Earlier studies have shown that air particulate matter (PM),particularly fine particulate matter(PM2.5)[2],is an important factor triggering childhood asthma. Since nationalPM2.5data were nota vailabl euntil 2013,

关键词： Effects of PM China Exposure in Different Air Quality Grades on Daily Outpatient Visits for Childhood Asthma in Shijiazhuang