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N gene enhances resistance to Chilli veinal mottle virus and hypersensitivity to salt stress in Nicotiana tobacum

中国化学会第十一届全国天然有机化学学术会议

作者： Yan Liu BingYou Yang Hai-bing Jiang zhenpeng xu Xiaomao Li Haixue Kuang Key Laboratory of Chinese Materia Medica Heilongjiang University of Chinese MedicineMinistry of Education

Ninteen phenylpropanoids,including one new（1） and eighteen known phenylpropanoids（2-19） were isolated and identified from n-butyl alcohol-soluble fraction of the 70%ethanol extracts from the fruits of Nicandra *** structures of these compounds were established by 1D and 2D NMR spectra referring to the literatures,together with mass *** were identified as methyl-3-（4-β-D-glucopyranosyl-3-hydroxy phenyl）propionate（Nicphensides A,1）,3,4-dihydroxybenzenepropionic acid methyl ester（2）,citrusin E（3）,dichotomoside E（4）,caffeic acid（5）,1-O-caffeoyl-β-D-glucopyranose（6）,β-D-glucopyranosyl 4-O-β-D-glucopyranosyl caffeate（7）,3-hydroxyl-2-methyl-4-H-pyran-4-one-3-O-（6-0-caffeoyl）-β-D-glucopyranoside（8）,forsythoside H（9）,forsythoside A（10）,troside B（11）,icariside E5（12）,citrusin B（13）,scopolin（14）,7-Methoxycoumarin-6-β-Dglucopyranoside（15）,p-hydroxyphenethyl trans-ferulate（16）,5-O-feruloylquinic acid（17）,martynoside（18）,isoforsythiaside（19）.All the compounds were evaluated for their antiinflammation activities against RAW 264.7 cells,as well as bioactivity of immunosuppression by virtue of mouse spleen *** was found that some of the compounds 1-19 showed medium anti-inflammation and potential immunosuppressive effect.

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N gene enhances resistance to Chilli veinal mottle virus and...

中国植物病理学会第十一届全国会员代表大会暨2018年学术年会

作者： Yang Ting Lv Rui xu zhenpeng Zhu Lisha Peng Qiding Qiu Long Lin Honghui Xi Dehui Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan University

Plants use multiple mechanisms to fight against pathogen *** resistance(R) gene which specifically mediate plant defense is one of the major mechanisms,while recent studies have shown that R genes have broad spectrum effects in response to various stresses.N gene is the resistance gene specifically resistant to Tobacco mosaic virus(TMV).However,the role of N gene in abiotic stress and other viral response remains *** veinal mottle virus(ChiVMV),a member of Potyvirus genus which contain the largest group of known plant viruses and comprise many agriculturally and economically important *** this study,we investigated the mechanisms by which N regulated plant defense responses under ChiVMV infection and salt ***,we monitored the physiological and molecular changes of tobacco plants under virus *** results showed that when tobacco and tobacco plants were challenged with ChiVMV,tobacco plants displayed more susceptibility at 5 days post infection(dpi),while tobacco plants exhibited more susceptibility at 20 *** accumulation of ROS and NtHIN1 expression were higher in tobacco than tobacco plants at 5 dpi,and the defense gene NtPR1,the activities of antioxidant enzymes and salicylic acid(SA) content were increased in tobaccoplants compared with tobacco *** was suggested that N gene induced hypersensitive response(HR) and enhanced the systemic resistance of plants in response to ChiVMV via a SA-dependent signaling pathway,which could be supported by some studies that systemic necrosis shared HR attributes.N gene induced HR and enhanced the systemic resistance of plants in response to ChiVMV.N gene could also be induced significandy by salt ***,tobacco plants showed hypersensitivity toward increased salt stress,and this hypersensitivity was dependent on abscisic acid and jasmonic acid but not *** together,our results indicated that N gene appeared to important for tobacco plants in response to ChiVMV infect

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联通本地传送网基础资源的规划建设

河南科技 2018年第17期37卷 26-30页

作者：徐振鹏河南省通信工程局有限责任公司河南郑州450000

为了适应联通网络覆盖的日益扩大, 本文提出建设以传输本体为主, 弱化基站等业务布局影响的、可适应今后业务发展、快速响应业务接入需求的本地传送网, 对本地传送网进行固化建设, 实现联通网络运行的快速、安全、高效.

关键词：本地传送网基础架构综合业务接入区综合业务接入点接入主干光缆县乡主干光缆

Riverine sulfate sources and behaviors in arid environment,Northwest China:Constraints from sulfur and oxygen isotopes

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Journal of Environmental Sciences 2024年第3期137卷 716-731页

作者： Yifu xu Wenjing Liu Bing xu Zhifang xu Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

The fate of riverine sulfate ion (SO_(4)^(2-)) and its environmental effects in arid environment are difficult to evaluate due to its complicated sources and strongly coupled behaviors with water cycle which is significantly modified by *** understand the sulfur cycle in aquatic systems in arid environment,the chemical and sulfur and oxygen isotopic compositions (δ^(34)S_(SO4)and δ^(18)O_(SO4)) of major rivers around the Badain Jaran Desert,northwestern China,were *** rivers had averaged SO_(4)^(2-)content at 1336μmol/L,over 10times higher than the global *** δ^(34)S_(SO4)and δ^(18)O_(SO4)values ranged from-5.3‰to+11.8‰and+1.6‰to+12.8‰,*** end-member analysis and the inverse model showed that riverine sulfate was mainly derived from evaporites dissolution (0-87%),sulfide oxidation (13%-100%) and precipitation (0-33%),indicating heterogeneity in sulfur sources and behaviors along the river drainage with the lithology variations and climate *** isotopic tools combining with hydro-chemistry compositions could be applied to reveal sulfur cycle in arid *** on the calculation,sulfide oxidation plays the primary role in the headwater and upstream in the Qilian-Mountains area,where sulfide is widely *** the proportion of evaporites dissolution contributing to riverine sulfate is much higher in downstream in a drier ***,less precipitation and higher temperature can lead to more intensive evaporation,affecting the process of sulfide oxidation and enhancing the rates of evaporites dissolution and sulfate precipitation in the basin.

关键词： Sulfur and oxygen isotopes Source apportionment Inverse model Arid environment Inland rivers Northwestern China

考虑P波预警参数的震源破裂特征实时持续估测方法

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地球科学 2024年第2期49卷 391-402页

作者：彭朝勇程振鹏郑钰徐志强中国地震局地球物理研究所北京100081 中国地震局震源物理重点实验室北京100081

在地震预警系统中引入震源破裂特征实时持续估测方法,可有效克服传统基于点源模型估测目标预警烈度和潜在破坏区的不足.现有方法的实时性通常只能达到分钟级,无法满足地震预警系统的高时效性要求.基于地震台站实时观测数据,通过引入地... 详细信息

在地震预警系统中引入震源破裂特征实时持续估测方法,可有效克服传统基于点源模型估测目标预警烈度和潜在破坏区的不足.现有方法的实时性通常只能达到分钟级,无法满足地震预警系统的高时效性要求.基于地震台站实时观测数据,通过引入地震预警P波特征参数,开展有限破裂模板匹配技术研究,形成了一套时效性更强的震源破裂特征实时估测方法.测试结果表明:利用本方法在震后同一时刻得到的结果相对于有限破裂探测器(FinDer)算法结果在速度上要快3 s左右,个别震例结果要快5 s;破裂初期,由于受到地震辐射多样性、场地、传播路径等因素的影响,走向θ会存在较大的波动.随着破裂的延展,θ逐渐收敛至参考值;对于M7.0级以下地震,震后6~10 s即可获得较稳定的破裂特征参数结果,而对于M7.0+地震,则需要更长的时间,尤其是类似于汶川8.0级这种特大地震,其结果在台网较为稀疏的情况下需到震后40 s才能逐渐稳定.

关键词：震源破裂特征 P波预警参数有限模板匹配实时波形数据天然地震

Laboratory evaluation of high-friction thin overlays for pavement preservation

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 936-948页

作者： Ouming xu Rentao xu Lintong JIN School of Highway Chang’an UniversityXi’an 710064China School of Materials Science and Engineering Chang’an UniversityXi’an 710061China

Traditional asphalt concrete(AC)and stone matrix asphalt(SMA),which are used as thin asphalt overlays,are common maintenance strategies to enhancing ride quality,skid resistance,and ***,several studies have used a novel asphalt mixture known as a high-friction thin overlay(HFTO)to improve surface ***,it remains uncertain whether the laboratory properties of HFTO differ significantly from those of conventional *** study aims to evaluate the laboratory properties of HFTO mixtures and compare them with those of AC and *** mixtures with nominal maximum size of 9.5 mm were produced in the laboratory,and performance tests were conducted,including wheel tracking test,low temperature flexural creep test,moisture susceptibility test,Cantabro Abrasion Test,Marshall Test,sand patch test,British pendulum test,and indoor tire-rollingdown *** results showed that the HFTO exhibited a lower tire/pavement noise than the AC and ***,HFTO had superior high-temperature stability,larger macro texture,and higher skid resistance in comparison to those of AC,but lower than those of ***,HFTO mixtures may be considered a suitable replacement for traditional AC mixtures in regions where skid resistance and noise reduction are concerns.

关键词： road engineering pavement maintenance high friction thin overlay performance skid resistance tire/pavement noise

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一种无线自组网故障检测算法

计算机工程 2015年第2期41卷 313-316页

作者：徐振朋沈浩曾玮妮杰瑞深软科技有限公司江苏连云港222061 江苏自动化研究所江苏连云港222061

针对无线自组网的拓扑结构,设计一种基于分簇的无线自组网节点故障检测架构和对应的故障检测算法。分簇时分别确定主用簇和备用簇管理节点,冗余簇管理节点负责对内部成员实施异常检测,给出故障检测模块的心跳发送、心跳监控、心跳预判... 详细信息

针对无线自组网的拓扑结构,设计一种基于分簇的无线自组网节点故障检测架构和对应的故障检测算法。分簇时分别确定主用簇和备用簇管理节点,冗余簇管理节点负责对内部成员实施异常检测,给出故障检测模块的心跳发送、心跳监控、心跳预判与实时调整机制,通过增加心跳预判实时调整机制,确保算法能够动态适应自组网易变的拓扑结构,并通过备用簇管理节点和簇间共享异常信息机制,提高系统故障检测的可靠性。利用仿真实验对故障检测机制的性能进行评估,结果表明,提出的故障检测算法具备较好的检测准确率,能够有效满足上层应用在系统可靠性设计方面的需求。

关键词：无线自组网容错节点故障故障检测心跳预判

Granting strength to aerogel fibers through encapsulation

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Science China Materials 2024年第4期67卷 1365-1366页

作者： Wenhui xu Department of Basic Chemistry School of PharmacyJiangxi University of Chinese MedicineNanchang 330004China

Aerogel fibers, distinguished by their lightweight nature, pronounced porosity, large surface area, and superior thermal insulation properties, have diversified applications in thermal management, energy devices, and environmental remediation[1]. However, compared with monolithic ones, these fibershaped aerogels exhibit limited mechanical strength and resilience due to their one-dimensional small size.

关键词： strength fibers thermal

Aldehyde oxidase mediated enantioselective metabolic health risk of dinotefuran

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Science China Chemistry 2024年第6期67卷 2079-2091页

作者： Liwei xu Xinxin xu Hua Kuang Chuanlai xu Xiaoling Wu State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxi214122China International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology Jiangnan UniversityWuxi214122China Collaborative Innovation center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityWuxi214122China

Chiral pollutants often pose significant differential environmental health *** this study,the biotransformation of chiral dinotefuran(DIN)and its enantioselective metabolic toxicity mechanisms have been systemically ***,reversedphase chromatography-high resolution mass spectrometry was developed to quantify the content of DIN R/S chiral enantiomer with pg level sensitivity,revealing a lower elimination rate constant(K_(e))of S-DIN(0.730 h^(-1))than R-DIN(0.746 h^(-1)).Secondly,the interaction mechanism between DIN metabolism and important endogenous bioactive molecules,such as aldehyde oxidase(AOX)and neurotransmitters,was *** DIN nitro-group was converted into a guanidine group by the reducing site of nearby flavin adenine dinucleotide(FAD)in AOX with the preferred higher affinity of ***,the endogenous tryptophan(Trp)aldehyde metabolic intermediate,5-hydroxyindoleacetaldehyde(5-HIAL),provides a persistent electron donor for DIN reduction via the oxidation-catalyzed site in AOX,resulting in remarkable up-regulation of monoamine neurotransmitters such as serotonin and ***,the higher level of neurotransmitters further mediated dysregulation of oxylipin homeostasis via the serotonergic pathway,where S-DIN exhibited more pronounced liver lipid damage and environmental health risk with the accumulated lipid biomarkers,oxidized triglyceride(OxTG)and oxidized sphingomyelin(OxSM).This study elucidates the AOX-mediated enantioselectivity metabolic pathway of DIN,providing a new analytical method for chiral pollutants and paves the way for their health risk assessments.

关键词： neonicotinoid dinotefuran enantiomer aldehyde oxidase metabolomics health risk