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亚硒酸钠对苦荞光合特性及抗氧化酶活性的影响

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灌溉排水学报 2023年第12期42卷 1-6页

作者：马红梅王彩琴吴昕阳陆佳昊白春雨武文玥武志明山西农业大学资源环境学院山西太谷030801 山西农业大学工学院省部共建有机旱作农业国家重点实验室(筹) 太原030031 山西农业大学农业资源与环境国家级实验教学示范中心山西太谷030801

【目的】探究亚硒酸钠对苦荞光合特性及抗氧化酶活性的影响。【方法】基于盆栽试验,分别设置CK(0 mg/kg)、Se_(5)(5 mg/kg)、Se_(10)(10 mg/kg)、Se_(20)(20 mg/kg)、Se_(40)(40 mg/kg)共5个亚硒酸钠施用量,研究亚硒酸钠施用量对苦荞株... 详细信息

【目的】探究亚硒酸钠对苦荞光合特性及抗氧化酶活性的影响。【方法】基于盆栽试验,分别设置CK(0 mg/kg)、Se_(5)(5 mg/kg)、Se_(10)(10 mg/kg)、Se_(20)(20 mg/kg)、Se_(40)(40 mg/kg)共5个亚硒酸钠施用量,研究亚硒酸钠施用量对苦荞株高、鲜质量、干质量、光合特性和抗氧化酶活性的影响。【结果】①当亚硒酸钠施用量在5~10 mg/kg时,施硒显著增加苦荞生物量;与CK相比,5 mg/kg亚硒酸钠施用量的地下部干质量、鲜质量增加66.28%、80.00%,10 mg/kg亚硒酸钠施用量的苦荞株高增加7.05%。②施硒改善了苦荞光合特性。与CK相比,5~10 mg/kg亚硒酸钠施用量的苦荞净光合速率、蒸腾速率、气孔导度和叶绿素量平均显著增加7.57%、32.70%、28.12%、6.96%。同时5 mg/kg亚硒酸钠施用量的苦荞胞间CO_(2)摩尔分数显著下降13.95%,CO_(2)同化能力提升。施用亚硒酸钠对苦荞盛花期光合特性的影响最显著。③施硒对苦荞抗氧化酶活性影响作用较大;5 mg/kg亚硒酸钠施用量处理过氧化氢酶活性,较CK增幅最大,为3.29%;10 mg/kg亚硒酸钠施用量处理的超氧化物歧化酶和过氧化物酶较CK显著增加261.74%、88.63%。④当亚硒酸钠施用量为20、40 mg/kg时,苦荞生长发育受到抑制。【结论】5~10 mg/kg亚硒酸钠施用量能提高苦荞光合特性和抗氧化酶活性,盛花期效果尤为显著。

关键词：苦荞亚硒酸钠光合特性抗氧化酶活性

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出菇前后平菇菌料对番茄根结线虫的防效及对番茄生长的影响

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山西农业科学 2016年第11期44卷 1689-1691页

作者：吴婷婷李玉中滕涛卢佳豪肖射华衡阳师范学院南岳学院生命科学系湖南衡阳421008 衡阳师范学院生命科学与环境学院湖南衡阳421008

研究了黑平菇出菇前后菌料对番茄上南方根结线虫病的防治效果及其对番茄生长的影响。结果表明,在试验范围内,出菇前后的黑平菇菌料对番茄上根结线虫病均有防效,防治效果在13.33%~56.52%;在相同用量下,出菇前菌料防效要好于出菇后的菌料... 详细信息

研究了黑平菇出菇前后菌料对番茄上南方根结线虫病的防治效果及其对番茄生长的影响。结果表明,在试验范围内,出菇前后的黑平菇菌料对番茄上根结线虫病均有防效,防治效果在13.33%~56.52%;在相同用量下,出菇前菌料防效要好于出菇后的菌料;其中,出菇前300 g/盆的处理防效最好,达56.52%,且番茄生长最好,平均茎粗5.00 mm,平均株高32.70 cm。

关键词：平菇番茄南方根结线虫防效盆栽试验

基于低温氦气循环换热的TMS内冷系统设计研究

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低温与超导 2024年第2期52卷 54-59页

作者：张璐张展周超赵川漪李佐光万佳昊王冬虎中国科学技术大学合肥230026 中国科学院合肥物质科学研究院合肥230031 合肥综合性国家科学中心能源研究院合肥230001

经颅磁刺激线圈工作中伴随大量交流热损耗,文章提出了一种基于低温氦气循环换热设计,以应对TMS线圈应用中不断提高的脉冲电流幅值和频率。本文设计了一种由中空铜线绕制而成的TMS八字形线圈,采用液氮预冷及低温氦气协同冷却的机制实现... 详细信息

经颅磁刺激线圈工作中伴随大量交流热损耗,文章提出了一种基于低温氦气循环换热设计,以应对TMS线圈应用中不断提高的脉冲电流幅值和频率。本文设计了一种由中空铜线绕制而成的TMS八字形线圈,采用液氮预冷及低温氦气协同冷却的机制实现线圈高效换热,并通过构建传热平衡方程及电磁热流多物理场耦合仿真对TMS线圈的刺激过程进行了分析研究。结果表明,与未加换热时相比,经由氦气换热后的刺激线圈整体热损耗降低了70%,实现了TMS线圈的低损耗与高效换热,验证了基于低温氦气循环换热设计可以在TMS系统中应用。

关键词： TMS 八字形线圈流动换热低温氦气热损耗

A superior strength-ductility synergy of Al_(0.1)CrFeCoNi high-entropy alloy with fully recrystallized ultrafine grains and annealing twins

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Journal of Materials Science & Technology 2022年第36期131卷 185-194页

作者： jiahao Li Kejie lu Xiaojun Zhao Xinkai Ma Fuguo Li Hongbo Pan Jieming Chen Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Shenzhen Institute of Southwest Jiaotong University Shenzhen 518000China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling(Anhui University of Technology) 243002 MaanshanChina luoyang Ship Material Research Institute Luoyang 471023China

Grain refinement usually makes the materials stronger,while ductility has a dramatic ***,a superior tensile strength–ductility synergy in a fully recrystallized ultrafine-grained(UFG)Al_(0.1)CrFeCoNi with abundant annealing twins was achieved by cold rolling at room temperature and short-time *** microstructure characterization using electron backscattered scattering diffraction demonstrates that abundant geometrically necessary dislocations(GNDs)gather around the grain boundaries and twin boundaries after tensile *** coarse-grained(CG)samples undergo a larger plastic deformation than UFG samples,the GND density decreases with grain size ranging from UFG to *** electron microscopy results reveal that the annealing twin boundary,which effectively hinders the dislocation slip and stores dislocation in grain interior,and the activation of multiple deformation twins are responsible for the superior strength–ductility synergy and work hardening *** addition,the yield strength of fully recrystallized Al_(0.1)CrFeCoNi follows a Hall–Petch relationship(σ_y=24+676d^(–1/2)),where d takes into account both grain boundaries and annealing twin *** strengthening effects of grain boundaries and annealing twin boundaries were also evaluated separately.

关键词： High-entropy alloy Ultrafine grains Annealing twins Strength Ductility

Ordered mesoporous Cu-Ca-Zr:A superior catalyst for direct synthesis of methyl formate from syngas

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Carbon Resources Conversion 2018年第2期1卷 174-182页

作者： jiahao Zhuang Bin lu Fangna Gu Ziyi Zhong Fabing Su State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Zhongke Langfang Institute of Process Engineering Fenghua Road No.1Langfang Economic&Technical Development ZoneHebei Province 065001China Institute of Chemical and Engineering Sciences Agency for ScienceTechnology and Research(A*STAR)1 Pesek RoadJurong IslandSingapore 627833Singapore Institute of Industrial Chemistry and Energy Technology Shenyang University of Chemical TechnologyShenyang 110142China

It is still a big challenge to obtain both highly active and stable Cu-based catalysts for direct synthesis of methyl formate(MF)from *** address the issue,we have designed and synthesized a series of ternary Cu-Ca-Zr catalysts,namely,the ordered mesoporous Cu-Ca-Zr catalyst prepared by one-pot evaporation-induced self-assembly(EISA)method,and the supported CuO/CaO-ZrO_(2)catalysts by impregnating with copper precursor or by immobilizing copper *** the latter two catalysts,the ordered mesoporous CaO-ZrO_(2)support was also prepared by the EISA *** catalysts were characterized by techniques such as ICP,XRD,TEM,N2 isotherm adsorption-desorption,XPS and H2-TPR,and used for direct synthesis of *** results indicated that the catalyst prepared by onepot EISA method,in which the CuO species are highly dispersed in frame of CaO-ZrO_(2),exhibits much better activity and stability as compared with the other two catalysts with most of CuO located on the outer surface of the CaO-ZrO_(2)support,because the former has a higher specific surface area,enhanced synergistic effect and stronger interaction between the CaO-ZrO_(2)support and CuO active constituent.

关键词： Methyl formate Direct synthesis Cu-based catalyst Ordered mesoporous Activity

Comprehensive Approach to Assessment of Liver Viability During Normothermic Machine Perfusion

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Journal of Clinical and Translational Hepatology 2023年第2期11卷 466-479页

作者： jiahao Li Haoyang lu Jian Zhang Yixuan Li Qiang Zhao Organ Transplant Center The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongChina

Liver transplantation is the most effective treatment of advanced liver disease,and the use of extended criteria donor organs has broadened the source of available *** normothermic machine perfusion(NMP)has become a useful tool in liver transplantation,there are no consistent criteria that can be used to evaluate the viability of livers during *** review summarizes the criteria,indicators,and methods used to evaluate liver viability during *** shape,appearance,and hemodynamics of the liver can be analyzed at a macroscopic level,while markers of liver injury,indicators of liver and bile duct function,and other relevant indicators can be evaluated by biochemical *** liver can also be assessed by tissue biopsy at the microscopic *** methods for assessment of liver viability are *** limitations of evaluating liver viability during NMP are discussed and suggestions for future clinical practice are provided.

关键词： Normothermic machine perfusion Liver viability Criteria

UPLC-MS/MS法测定植物饮料中芦荟苷含量

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山东化工 2019年第12期48卷 66-68页

作者：林奕云郑家概付强丁少曼肖可茵卢嘉豪中国广州分析测试中心广东省分析测试技术公共实验室

建立了超高效液相色谱-三重四级杆串联质谱(UPLC-MS/MS)法测定植物饮料中芦荟苷含量的分析方法。样品用甲醇提取,采用Agilent Zorbax Eclipse Plus C18柱(4.6mm×50mm,2.7μm)为分离柱,以乙腈和水作为流动相,梯度洗脱。在电喷雾负离子... 详细信息

建立了超高效液相色谱-三重四级杆串联质谱(UPLC-MS/MS)法测定植物饮料中芦荟苷含量的分析方法。样品用甲醇提取,采用Agilent Zorbax Eclipse Plus C18柱(4.6mm×50mm,2.7μm)为分离柱,以乙腈和水作为流动相,梯度洗脱。在电喷雾负离子模式下(ESI-),用多重反应监测(MRM)模式进行检测,基质匹配外标法定量。在优化的实验条件下,芦荟苷的检出限为1.0μg/kg,定量限为3.0μg/kg,线性范围为1.0~25ng/mL,相关系数r≥0.9995。在5、10和25μg/kg这3种加标水平下芦荟苷的平均回收率为91.2%~95.3%,相对标准偏差(RSD6)为3.15%~6.10%。该方法简单、灵敏度高、结果准确可靠,可用于植物饮料中芦荟苷含量的测定。

关键词：超高效液相色谱-串联质谱法芦荟苷植物饮料

Theoretical analysis of PAM-N and M-QAM BER computation with single-sideband signal

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Science China(Information Sciences) 2021年第8期64卷 172-181页

作者： Dongxu lu Xian ZHOU Yuqiang YANG jiahao HUO Jinhui YUAN Keping LONG Changyuan YU Alan Pak Tao LAU Chao lu Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services University of Science and Technology Beijing Department of Electrical Engineering The Hong Kong Polytechnic University Department of Electronic and Information Engineering The Hong Kong Polytechnic University

In this paper, the theoretical bit error rate(BER) of N-level pulse amplitude modulation(PAMN)and M-ary quadrature amplitude modulation(M-QAM) have been studied and compared under different scenarios, including(i) PAM with intensity modulation with direct detection(IM/DD) and field modulation with detection(FMD)(including coherent detection and single-sideband modulation with direct detection(SSB-DD)), and(ii) QAM with coherent detection and SSB-DD. Considering the relationship between the symbol spacing and signal-to-noise ratio(SNR), we provide the mathematical BER equations, including the optical signal-to-noise ratio(OSNR) and carrier-to-signal power ratio(CSPR), especially for PAM *** verify the validity of our theoretical expressions for SSB systems, transmissions with 224-Gb/s SSBPAM4/16 QAM signals using the Kramers-Kronig(KK) receiver were implemented on a unified optical system platform. The simulation results agreed well with theoretical calculations both in back-to-back(BtB) and120-km transmission scenarios, which showed that the BER evaluation methods can serve as a theoretical guidance and system assessment criteria for SSB scenarios.

关键词： N-level pulse amplitude modulation(PAM-N) M-ary quadrature amplitude modulation(MQAM) BER computation single-sideband(SSB) Kramers-Kronig receiver

Chiral supramolecular 2D halogen-bonded organic frameworks constructed by post-synthetic modified cross-linking strategy

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Science China Chemistry 2023年第11期66卷 3169-3177页

作者： Ning Xia jiahao Zhao Guanfei Gong Hongqiang Dong Haohu Li Jike Wang lu Wang Shigui Chen The Institute for Advanced Studies Wuhan UniversityWuhan 430072China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China

The development of preparation methods for XOFs,as a new class of organic frameworks,plays a crucial role in shaping their structures,functions,and potential *** this study,we presented the construction of chiral supramolecular 2D halogen-bonded organic frameworks(XOFs)through a post-synthetic modification strategy.A linear halogen-bonded organic polymer(XOP),XOP-DPBA,decorated with aldehyde groups,was initially prepared to validate the feasibility of post-synthetic modification for XOF construction and ***-DPBA exhibited excellent reactivity with amines,forming imine *** utilizing this reactivity,a series of cross-linked 2D XOFs were efficiently prepared through post-synthetic modified cross-linking ***,we successfully introduced chiralα/β-cyclodextrins(α/β-CD)into the XOF skeletons via host-guest interactions,resulting in the fabrication of chiral supramolecular 2D *** chiral XOFs displayed the induced circular dichroism(ICD)signals and assembled them into helical *** post-synthetic modification strategy demonstrated its versatility and simplicity for the construction and functionalization of XOFs.

关键词： supramolecular halogen-bonded organic frameworks [N···I~+···N]halogen bond post-synthetic modification supramolecular self-assembly chirality induction