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外源富氢水对盐胁迫下绿豆幼苗生长的影响

土壤通报 2024年第4期55卷 1014-1021页

作者：武泉栋姚玲崔健张丁郭锋申慧芳王新妤王晋山西农业大学资源环境学院山西太谷030801 山西农业大学农学院山西太谷030801 山西农业大学基础部山西太谷030801

【目的】盐胁迫是制约绿豆生长最严重的非生物胁迫之一,如何缓解绿豆盐胁迫已成为植物抗逆研究方面的重要课题。富氢水作为一种新型外源添加物质在提高植物抗逆性方面发挥着重要作用,本文旨在探究外源富氢水缓解绿豆盐胁迫的可行性。【... 详细信息

【目的】盐胁迫是制约绿豆生长最严重的非生物胁迫之一,如何缓解绿豆盐胁迫已成为植物抗逆研究方面的重要课题。富氢水作为一种新型外源添加物质在提高植物抗逆性方面发挥着重要作用,本文旨在探究外源富氢水缓解绿豆盐胁迫的可行性。【方法】以绿豆幼苗为试验材料,采用沙培方式,从幼苗生长指标、光合色素含量和抗逆性指标三方面,研究根灌不同浓度富氢水(25%、50%和100%)对盐含量1.5 g kg^(-1)盐胁迫下绿豆幼苗的缓解效应。【结果】与非盐胁迫对照相比,在1.5 g kg^(-1)盐胁迫处理下,绿豆幼苗生长和叶片光合色素含量受到明显抑制,丙二醛、可溶性糖和可溶性蛋白的含量明显增加。与1.5 g kg^(-1)盐胁迫、非富氢水处理相比,施加不同浓度富氢水(25%、50%、100%)处理均有效促进绿豆幼苗根系和地上部生长,丙二醛的含量显著降低,叶绿素、可溶性糖含量显著增加(P<0.05)。【结论】外源不同浓度富氢水处理均能缓解绿豆幼苗盐胁迫,其中50%富氢水处理的缓解效果最佳。利用外源富氢水缓解盐胁迫的成本较低、操作简单、不会对环境造成污染,研究结果对外源富氢水缓解绿豆幼苗盐胁迫方面的应用具有一定的指导意义。

关键词：绿豆富氢水盐胁迫幼苗

基于AHP和熵权法的航空维修差错致因因素分析

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安全 2024年第9期45卷 47-52页

作者：张玎孙正楠朱做涛张宇坤孔光明海军航空大学青岛校区山东青岛266041 海军第91049部队山东青岛266100

为准确识别航空维修差错重要致因因素,提升预防措施制定的针对性,基于由人员、硬件、软件以及环境组成的SHEL模型构建了航空维修差错致因评价指标体系,以海军航空兵某部队航空维修为例采用层次分析法(AHP)和熵权法对各指标重要度进行分... 详细信息

为准确识别航空维修差错重要致因因素,提升预防措施制定的针对性,基于由人员、硬件、软件以及环境组成的SHEL模型构建了航空维修差错致因评价指标体系,以海军航空兵某部队航空维修为例采用层次分析法(AHP)和熵权法对各指标重要度进行分析,结合两者的分析结果,提出预防措施。分析结果显示:层次分析法获得的主要致因因素为人际关系和交际能力、信息平台、生理/心理素质、工作负荷和人员培训;熵权法获得的主要致因因素为飞机结构、人员培训、人际关系和交际能力、维修装备与设备以及知识与技能;提出该部队可通过信息化等手段强化过程记录以确保工作交接完备等措施。

关键词：航空维修差错致因因素分析 SHEL模型层次分析法(AHP) 熵权法

Hyperon Dynamics in Heavy-Ion Collisions near Threshold Energy

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Chinese Physics Letters 2021年第9期38卷 33-37页

作者： ding-Chang zhang Hui-Gan Cheng Zhao-Qing Feng School of Physics and Optoelectronic Technology South China University of TechnologyGuangzhou 510641China

Within the framework of quantum molecular dynamics transport model,the isospin and in-medium effects on the hyperon production in the reaction of ^(197)Au+^(197) Au are investigated thoroughly.A repulsive hyperon-nucleon potential from the chiral effective field theory is implemented into the model,which is related to the hyperon momentum and baryon *** correction on threshold energy of the elementary hyperon cross section is taken into *** is found that the𝛴yields are suppressed in the domain of midrapidity and kinetic energy spectra with the *** hyperons are emitted in the reaction plane because of the strangeness exchange reaction and reabsorption process in the nuclear ***∑^(−)/𝛴∑^(+)ratio depends on the stiffness of nuclear symmetry energy,in particular in the high-energy region(above 500 MeV).

关键词： potential density elementary

PNPLA3 I148M variant in nonalcoholic fatty liver disease:Demographic and ethnic characteristics and the role of the variant in nonalcoholic fatty liver fibrosis

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World Journal of Gastroenterology 2015年第3期21卷 794-802页

作者： Li-Zhen Chen Yong-Ning Xin Ning Geng Man Jiang ding-ding zhang Shi-Ying Xuan Department of Gastroenterology Qingdao Municipal Hospital Medical College of Qingdao University

Patatin-like phospholipase domain-containing 3(PNPLA3 or adiponutrin) displays anabolic and catabolic activities in lipid metabolism,and has been reported to be significantly associated with liver fat *** have established a strong link between the 148 isoleucine to methionine protein variant(I148M) of PNPLA3 and liver diseases,including nonalcoholic fatty liver disease(NAFLD).However,detailed demographic and ethnic characteristics of the I148 M variant and its role in the development of nonalcoholic fatty liver fibrosis have not been fully *** present review summarizes the current knowledge on the association between the PNPLA3 I148 M variant and NAFLD,and especially its role in the development of nonalcoholic fatty liver ***,we analyze the impact of demographic and ethnic characteristics of the PNPLA3 I148 M variant and the presence of metabolic syndrome on the association between PNPLA3 I148 M and ***,we explore the role of the PNPLA3 I148 M in the development of nonalcoholic fatty liver fibrosis,and hypothesize the underlying mechanisms by speculating a pro-fibrogenic ***,we briefly highlight future research that may elucidate the specific mechanisms of the PNPLA3 I148 M variant in fibrogenesis,which,in turn,provides a theoretical foundation and valuable experimental data for the clinical management of nonalcoholic fatty liver fibrosis.

关键词： PNPLA3 I148M variant Polymorphism Nonalcoholic fat

Effects of Sb Addition on Microstructural Evolution and Mechanical Properties of Mg–9Al–5Sn Alloy

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Acta Metallurgica Sinica(English Letters) 2021年第2期34卷 278-288页

作者： Chun-Hua Ma Fu-Sheng Pan ding-Fei zhang Ai-Tao Tang Zhi-Wen Lu College of Materials Science and Engineering Chongqing UniversityChongqing 400045China College of Mechanical and Electronic Engineering Nanyang Normal UniversityNanyang 473061China

The Mg–9Al–5Sn-xSb(x=0.0,0.3,0.6,1.0,1.5 wt%)alloys were prepared by a simple alloying process followed by hot extrusion with an extrusion ratio of *** effects of Sb additions on the microstructure and mechanical properties of the Mg–9 Al–5 Sn alloys were investigated by optical microscopy,X-ray diffraction,transmission electron microscopy,scanning electron microscopy equipped with an energy-dispersive X-ray *** results indicated that the phasesα-Mg matrix,Mg2Sn,Mg_(3)Sb_(2) and Mg17 Al12 exist in the as-cast Sb-containing *** addition results in the precipitation of Mg_(3)Sb_(2).The dendritic size of these alloys decreases with the addition of *** their ultimate tensile strength and yield strength of extruded alloys increase,and their elongation decreases gradually with increasing the content of *** better mechanical properties of the as-extruded alloys were achieved due to the refined grains and the formation of dispersive second phases Mg_(3)Sb_(2).

关键词： Mg–Al–Sn–Sb alloy Microstructure Extrusion Second phase Mechanical properties

Synthesis and Crystal Structure of (2S,2'S,4'R)-2-(1-Hydroxy-1-ethylpropyl)-1-[(1'-p-tosyl-4'-hydroxypyrrolidin-2'-yl)methyl]pyrrolidine

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Chinese Journal of Structural Chemistry 2006年第10期25卷 1203-1208页

作者： FU Yu-Qin ding Li-Na zhang Sheng-Hong TAO Jing-Chao ZHU Yu Department of Chemistry New Drug Research ＆ Development Center Zhengzhou University Zhengzhou 450052 China

The title compound （2S,2＇S,4＇R）-2-（1-hydroxy-1-ethylpropyl）-1-[（1＇-p-tosyl-4＇- hydroxypyrolidin-2＇-yl）methyl]pyrrolidine synthesized by using （2S,4R）-4-hydroxy-L-proline and L-proline as the main materials was characterized through IR, ^1H NMR, ^13C NMR and HRMS spectra as well as single-crystal X-ray diffraction analysis. There is one equivalent ethanol involved in the crystal （C23H40N2O5S, Mr = 456.63）. The crystal belongs to the triclinic system, space group P1, a = 6.5628（13）, b = 8.4228（17）, c = 11.957（2）°A, α= 80.54（3）,β= 83.19（3）, γ= 89.89（3）°, V= 647.3（2） °A^3, Z = 1, D, = 1.171 g/cm^3, λ（MoKα） = 0.71073°A,β = 0.158 mm^-1, F（000） = 248, the final R = 0.0465 and wR = 0.1336 for 1769 observed reflections with I〉 2σ（I）. The adjacent molecules of compound 5 are linked through intermolecular hydrogen bonds formed by the secondary hydroxy group of one molecule with the tertiary hydroxy group of another one, and the molecular chains are further linked by ethanol through two kinds of hydrogen bonds with two molecules from different chains respectively to form a supramolecular structure.

关键词： proline derivative chiral amino alcohol synthesis crystal structure

Photo-thermoelectric effect induced electricity in stretchable graphene-polymer nanocomposites for ultrasensitive strain sensing

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Nano Research 2019年第12期12卷 2982-2987页

作者： ding zhang Yiding Song Lu Ping Suwen Xu De Yang Yuanhao Wang Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China Department of Neurology Fuling Center Hospital of Chongqing CityChongqing 408000China Xinjiang Technical Institute of Physics&Chemistry Chinese Academy of SciencesUrumqi 830011China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Stretchable strain sensors play an increasingly important role in artificial intelligent ***,high-performanee strain sensors havebeen slowly developed owing to the harsh requirement of self-powered function,long cycle life and high ***,we report aself-powered stretchable graphene-ecoflex composite strain sensor based on photo-thermoelectric(PTE)effect induced *** exhibits a high strain sensitivity of-0.056 In(nA)/%with strains ranged from 0%to 20%under 980 nm light illumination,where thestrain sensitivity can be found to in crease with in creasi ng light inte *** strain sensor maintains outstanding dyn amic stability un derperiodic strains ranged from 0 to 100%in 100 *** sensing resolution can be as high as 0.5%with both the response and recovery timeof less than 0.6 *** can precisely monitor human joint motions and stretchable strains by implanting the device in pork.

关键词： graphene-polymer nanocomposites photo-thermoelectric effect strain sensor stretchable implantable

Critical damage value of AZ31B magnesium alloy with different temperatures and strain rates

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Rare Metals 2021年第1期40卷 137-142页

作者： Jing-Ren Dong ding-Fei zhang Yu-Feng Dong Fu-Sheng Pan Sen-Sen Chai College of Materials Science and Engineering Chongqing UniversityChongqing 400045China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400045China

The uniaxial tensile tests were carried out at temperature ranging from room temperature(RT)to 523 K under strain rates of 0.001,0.010 and 0.100 s^(-1) to obtain the flow stress of AZ31 B magnesium *** tensile tests were simulated by the finite element method(FEM)to calculate the critical damage values(Dc)of the CockcroftLatham criterion to predict the occurrence of fracture ***,the effects of temperature and strain rate on Dc were analyzed to predict the critical damage value’s *** results demonstrate that the critical damage value changes in the range of *** increases as strain rate decreases at constant temperature,and increases with the increase of temperature under certain strain rate,but is more sensitive to the temperature.

关键词： AZ31 magnesium alloy Cockcroft-Latham Critical damage value Strain rates

Dynamic Modeling and Experimental Verification of an RPR Type Compliant Paralle Mechanism with Low Orders

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 83-94页

作者： Shuang zhang Jingfang Liu Huafeng ding Yanbin zhang School of Mechatronics Engineering Henan University of Science and TechnologyLuoyangHenanChina Faculty of Materials and Manufacturing College of Mechanical Engineering and Applied Electronics TechnologyBeijing University of TechnologyBeijingChina Key laboratory of advanced manufacturing technology Beijing University of TechnologyBeijingChina School of Mechanical Engineering and Electronic Information China University of Geosciences(Wuhan)WuhanChina Center of Machinery Equipment Advanced Manufacturing of Henan Province LuoyangChina

Efficiency of calculating a dynamic response is an important point of the compliant mechanism for posture *** modeling with low orders of a 2R1T compliant parallel mechanism is studied in the *** mechanism with two out-of-plane rotational and one lifting degrees of freedom(DoFs)plays an important role in posture *** on elastic beam theory,the stiffness matrix and mass matrix of the beam element are established where the moment of inertia is *** improve solving efficiency,a dynamic model with low orders of the mechanism is established based on a modified modal synthesis ***,each branch of the RPR type mechanism is divided into a ***,a set of hypothetical modes of each substructure is obtained based on the C-B ***,dynamic equation of the whole mechanism is established by the substructure assembly.A dynamic experiment is conducted to verify the dynamic characteristics of the compliant mechanism.

关键词： Compliant parallel mechanism Dynamic model Modal synthesis method Dynamic experiment