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精细与专用化学品 2024年第4期32卷 46-52页

作者：刘兴龙宋晓文河北新启元能源技术开发股份有限公司河北沧州061108

通过增加油气收集控制管道系统,对河北新启元能源技术开发股份有限公司罐区轻质油品、重质油品储罐进行技术改造,降低了罐区储罐灌顶呼吸挥发性有机物(VOCs)无组织排放,使VOCs排放达标,以联锁控制保证安全运行。

关键词： VOCs无组织排放储罐废气收集联锁控制

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辽河平原稻区粳稻耐热性综合评价

中国农业气象 2024年第9期45卷 968-983页

作者：宋晓雯刘春溪陈乾王国骄孙备杨晓瑾殷红沈阳农业大学农学院沈阳110866 陕西省气象科学研究所西安710016 本溪市气象局本溪117000 陕西省大气探测技术保障中心西安710014 商洛市气象局商洛726000

以辽河平原稻区适宜种植的20个粳稻品种为试验材料,采用农田开放式增温系统模拟增温。于水稻收获风干后测定有效穗数(X_(1))、每穗粒数(X_(2))、结实率(X_(3))、千粒重(X_(4))、产量(X_(5))、糙米率(X_(6))、精米率(X_(7))、蛋白质含量(... 详细信息

以辽河平原稻区适宜种植的20个粳稻品种为试验材料,采用农田开放式增温系统模拟增温。于水稻收获风干后测定有效穗数(X_(1))、每穗粒数(X_(2))、结实率(X_(3))、千粒重(X_(4))、产量(X_(5))、糙米率(X_(6))、精米率(X_(7))、蛋白质含量(X_(8))、直链淀粉含量(X_(9))和食味值(X_(10))指标,对比增温处理下不同粳稻品种10个性状指标的耐热系数,采用多元统计分析方法综合评价其耐热性,为建立有效的耐热评价体系提供依据。结果表明:除食味值外,增温处理使其他9个性状指标显著或极显著降低;基于耐热系数相关性分析表明,水稻性状各指标间存在不同程度的相关性,应用主成分分析将10个单项指标降维转化为4个相互独立的综合指标,其贡献率分别为34.816%、19.265%、15.636%和10.605%,累计贡献率达80.322%;利用隶属函数法计算耐热性综合评价值(D_(i)值),D_(i)值越大代表耐热性越强,‘盐粳456’耐热性最强,‘沈农016’耐热性最差;20个粳稻品种按耐热性强弱可划分为3类,第Ⅰ类为耐热型7个品种,第Ⅱ类为中度耐热型6个品种,第Ⅲ类为热敏感型7个品种。

关键词：粳稻增温耐热性综合评价多元统计分析

Transcriptome analysis of hsp18.3 functions and regulatory systems using RNA-sequencing in the red flour beetle,Tribolium castaneum

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Journal of Integrative Agriculture 2018年第5期17卷 1040-1056页

作者： XIONG wen-feng XIE Jia WEI Lu-ting ZHANG Si-si song xiao-wen GAO Shan-shan LI Bin Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life SciencesNanjing Normal University

The red flour beetle, Tribolium castaneum, is a major agriculture pest of stored grain, cereal products and peanuts for human consumption. It is reported that heat shock protein 18.3 of T. castaneum（Tchsp18.3） plays a significant role in stress resistance, development and reproduction. However, the regulatory systems of Tchsp18.3 remain unknown. Therefore, we compared the global transcriptome profiles of RNA interference（RNAi）-treated larvae（ds-Tchsp18.3） and control larvae of T. castaneum using RNA sequencing. Overall, we obtained 14 154 435 sequence reads aligned with 13 299 genes. Additionally, 569 differentially expressed genes（DEGs） were identified from the ds-Tchsp18.3 and control groups, of which 246 DEGs were annotated in the 47 Gene Ontology（GO） functional groups and 282 DEGs were assigned to 147 Kyoto Encyclopedia of Genes and Genomes（KEGG） biological signaling pathways. The DEGs encoding viperin, dorsal, Hdd11, PGRP2, defensin1 and defensin2 were simultaneously related to immunity and stress responses, which suggests that cross-talk might exist between the immunity and stress responses of T. castaneum. The knockdown of Tchsp18.3 gene expression suppressed the antioxidant activity process, which most likely modulated the effects of Tchsp18.3 on development and reproduction. Furthermore, the DEGs, including Blimp-1, Gld, Drm, Kinesin-14, Pthr2, Delta（11）-like and EGF-like domain protein 2, were also associated with the development and reproduction of ds-Tchsp18.3 insects. Additionally, knockdown of Tchsp18.3 amplified the serine protease（SP） signaling pathway to further regulate stress responses and innate immunity as well as development and reproduction of the red flour beetles. These results provide valuable insight into the molecular regulatory mechanism of Tchsp18.3 involved in insect physiology and further facilitate the research of suitable and sustainable management for pest control.

关键词： Hsp18.3 stress response immunity development reproduction Tribolium castaneum

Asymmetric radical allylation of β-keto esters with vinyl cyclopropanes by dual photoredox/nickel catalysis

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Science China Chemistry 2024年第11期67卷 3807-3816页

作者： wen-Yuan Qu Xue-song Zhou wen-Jing xiao Jia-Rong Chen Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction Ministry of EducationCollege of Chemistry Central China Normal University Wuhan Institute of Photochemistry and Technology Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University

Radical-involved allylation reactions have emerged as a powerful platform for construction of carbon-carbon and carbonheteroatom bonds, facilitating the strategic incorporation of diverse allyl moieties. Nevertheless, this burgeoning field still faces ongoing challenges, including limitations of radical precursors and coupling partners, and difficulties in achieving enantiocontrol. Herein, we report for the first time a highly enantioselective radical allylation involving β-keto esters with vinyl cyclopropanes utilizing a synergistic dual photoredox/nickel catalysis under visible light irradiation. The mild and redox-neutral catalytic protocol demonstrates an extensive substrate compatibility and good functional tolerance, providing access to enantioenriched β-keto esters featuring quaternary α-stereocenter with good yields and high enantioselectivities. Preliminary mechanistic studies have uncovered that the success of the reaction hinges on the dual roles of nickel catalyst, including in situ formation of photoredox sensitive substrate/Ni complex and the ensuing asymmetric radical addition step.

关键词： asymmetric allylation photoredox catalysis radical addition nickel catalysis β-keto esters vinyl cyclopropanes

Theory of constructing closed parametric curves based on manifolds

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Frontiers of Electrical and Electronic Engineering in China 2006年第4期1卷 451-454页

作者： GAO Bin HU Shu-gen song xiao-wen YU xiao-li College of Mechanical and Energy Engineering Zhejiang UniversityHangzhou 310027China

A parametric curve based on a manifold is de-signed for constructing an accurate closed curve.A circle was defined as the parametric space and a non-uniform B-splines defined on the unit circle were used as base func-tions.A method to construct knot vectors,control points and corresponding parameters were proposed.A method to de-termine the coordinates for any point on a curve was also *** non-uniform rational B-splines(NURBS)control techniques,such as curves with an embedded line,a sharp angle,and so on,were used to verify the proposed method’s compatibility with *** examples were used to compare the arithmetic with that of *** results show that the method is not only simple,feasible and reliable but also compatible with a CAD system using NURBS.

关键词： closed curve differential manifold base func-tion shape control

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防风对春季低温胁迫的生理响应

中国现代中药 2024年第6期26卷 1036-1047页

作者：刘文斐张炜王力扬姚瑶宋孝文孟祥才黑龙江中医药大学黑龙江哈尔滨150040

目的:探究防风对春季低温胁迫的生理响应,根据次生代谢产物含量确定防风的最佳采收时间。方法:在秋末和春季分别采收防风鲜根,比较防风内活性氧含量、抗氧化酶活性、次生代谢产物关键酶活性、次生代谢产物含量和总多糖、酸性多糖含量之... 详细信息

目的:探究防风对春季低温胁迫的生理响应,根据次生代谢产物含量确定防风的最佳采收时间。方法:在秋末和春季分别采收防风鲜根,比较防风内活性氧含量、抗氧化酶活性、次生代谢产物关键酶活性、次生代谢产物含量和总多糖、酸性多糖含量之间的关系。结果:在春季低温的影响下,防风鲜根中活性氧和丙二醛的含量,超氧化物歧化酶、过氧化氢酶和过氧化物酶活性,防风次生代谢产物关键酶苯丙氨酸裂解酶、乙酰辅酶A羧化酶、查耳酮合成酶活性及代谢途径产物1,3-二磷酸甘油酸含量比秋季均有显著提高。与秋季比较,春季防风中升麻素苷、5-O-甲基维斯阿米醇苷和升麻素含量分别提高了17.7%、36.7%、11.1%;秋季防风总多糖和酸性多糖含量均高于春季。结论:防风抗氧化酶和次生代谢产物共同作用维持机体在春季低温胁迫下活性氧的平衡,春季采收可显著提高色原酮含量。

关键词：防风采收期活性氧次生代谢色原酮

早期帕金森病患者胃排空障碍在胃肠超声造影中的表现

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广东医学 2024年第4期45卷 510-515页

作者：董晓梦李斌陈连祥宋晓文王洪财苏毅鹏滨州医学院附属医院神经内科山东滨州256603 滨州医学院附属医院超声医学科山东滨州256603

目的研究早期帕金森病患者的非运动症状—胃排空障碍在胃肠超声造影中的表现。方法对32例门诊及住院的、诊断为早期帕金森病(HY分级Ⅰ~Ⅱ期)并存在胃排空障碍(包括恶心呕吐、早饱、餐后持续性上腹胀满等症状)的患者(PD组)和同期30例健... 详细信息

目的研究早期帕金森病患者的非运动症状—胃排空障碍在胃肠超声造影中的表现。方法对32例门诊及住院的、诊断为早期帕金森病(HY分级Ⅰ~Ⅱ期)并存在胃排空障碍(包括恶心呕吐、早饱、餐后持续性上腹胀满等症状)的患者(PD组)和同期30例健康体检者(对照组)进行胃肠超声造影检查,记录并测量两组入组者在饮入胃肠造影剂后的不同时间点(0~120 min)的胃窦收缩幅度(ACA)、胃窦收缩频率(ACF)、胃动力指数(GMI)、胃排空率(GER)、胃排空时间(GET)、胃壁增厚率、胃蠕动波速度等胃动力参数。结果PD组患者在各时间点的ACA、ACF、GMI及GER值均低于对照组(P<0.01,P<0.05);胃窦排空时间大于对照组(P均<0.01);30 min时PD组胃壁增厚率及胃蠕动波速度均低于对照组(均P<0.01)。结论早期帕金森病患者的胃排空障碍可借助胃肠超声造影得到有效评估。

关键词：早期帕金森病胃排空障碍胃肠超声造影

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气溶胶吸湿性及其对霾形成的影响研究进展

陕西气象 2024年第3期 9-16页

作者：贺晨昕李星敏董自鹏彭艳宋晓雯陕西省气象科学研究所西安710016 陕西省气象局秦岭和黄土高原生态环境气象重点实验室西安710016

气溶胶吸湿性与其微物理过程和化学性质密切相关,研究气溶胶吸湿性对于揭示雾霾的形成机制,提高云凝结核(CCN)模拟精度等具有重要意义。在调研国内外相关文献的基础上,总结了大气气溶胶吸湿性测量与模拟计算方法,梳理了气溶胶吸湿性与... 详细信息

气溶胶吸湿性与其微物理过程和化学性质密切相关,研究气溶胶吸湿性对于揭示雾霾的形成机制,提高云凝结核(CCN)模拟精度等具有重要意义。在调研国内外相关文献的基础上,总结了大气气溶胶吸湿性测量与模拟计算方法,梳理了气溶胶吸湿性与气溶胶粒子组分、粒径谱、粒子老化过程及混合态的关系。由于排放源和环境条件的不同,不同区域气溶胶吸湿性具有不同的变化特征,气溶胶吸湿性对霾形成具有重要影响,气溶胶吸湿性引起的辐射强迫越来越得到关注。通过以上分析总结,以期为未来与气溶胶吸湿性研究的相关工作提供参考借鉴。

关键词：气溶胶散射吸湿增长因子粒径吸湿增长因子气候效应

Intrinsically asymmetric atomic character regulates piezoelectricity in two-dimensional materials

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Frontiers of physics 2024年第3期19卷 153-162页

作者： Yun-Qin Li Qi-wen He Dai-song Tang xiao Shang xiao-Chun Wang School of Physics Science and Information Technology Liaocheng UniversityLiaocheng 252000China Key Laboratory of Polar Materials and Devices Ministry of EducationDepartment of ElectronicsEast China Normal UniversityShanghai 200241China Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China

Decreasing of layer thickness causes the decrease of polarization until it disappears due to the existence of depolarization ***,the search for strong piezoelectric materials is highly desirable for multifunctional ultra-thin piezoelectric ***,we propose a common strategy for achieving strong piezoelectric materials through the electronic asymmetry induced by the intrinsically asymmetric atomic character of different chalcogen ***,in the tetrahedral lattice structures,for example,M4X3Y3(M=Pd/Ni,X/Y=S,Se or Te,X≠Y)monolayers are proved to display excellent out-of-plane ***4Se3Te3 possesses the largest piezoelectric coefficient d33 of 61.57 pm/V,which is much larger than that of most 2D *** the electronic asymmetry further increases the out-of-plane piezoelectricity of Janus M4X3Y3 ***,the out-of-plane piezoelectricity is positively correlated with the ratio of electronegativity difference(Red)and the electric dipole moment(P).This work provides alternative materials for energy harvesting nano-devices or self-energized wearable devices,and supplies a valuable guideline for predicting 2D materials with strong out-of-plane piezoelectricity.

关键词： piezoelectricity intrinsically asymmetric atomic character ratio of electronegativity difference electric dipole moment first-principles calculations

Recent advances in vacancy engineering for reliable lithiumsulfur batteries

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Rare Metals 2024年第2期43卷 455-477页

作者： wen-Dong Liu xiao Tang Jun-An Feng Chao-Yue Zhang Hao Liu Chuan Shi xiao-Xian Zhao Jian-Jun song College of Physics School of Chemistry and Chemical EngineeringQingdao UniversityQingdao266071China Faculty of Science Centre for Clean Energy TechnologySchool of Mathematical and Physical SciencesUniversity of Technology SydneySydneyNSW2007Australia Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding071001China

The high-energy-density and low-cost features endow lithium-sulfur batteries with broad application ***,many drawbacks,especially the detrimental shuttle effect,have hindered the further development of *** response,a lot of new structures have been applied to suppress the shuttle effect and promote the development of ***,vacancy engineering has gained the attention of researchers due to its unique electronic *** review aims to analyze the application of vacancy engineering in ***,the electrochemistry of LSBs has been systematically discussed and the existing challenges as well as improvement tactics of LSBs have also been ***,the preparation methods and characterization technologies of various vacancies are summarized,including oxygen vacancies,sulfur vacancies,selenium vacancies,other anion vacancies,cation vacancies,*** latest applications of vacancy engineering in LSBs are also summarized in this ***,some prospects and insights for further investigation and practical application of vacancy engineering in LSBs are put forward.

关键词： Lithium-sulfur batteries(LSBs) Defects Vacancy engineering Electronic structure Shuttle effect