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Phyton-International Journal of Experimental Botany 2024年第2期93卷 355-369页

作者： Dandan Wang xiaohong li Yanwen Zhang School of Science Liaodong UniversityDandong118003China

Taxus cuspidata is a rare plant with important medicinal and ornamental *** at the obvious differences between wild and cultivated populations of *** from Northeast China,a total of 61 samples,that is,33 wild yews and 28 cultivated yews were used to analyze the differences and correlations of the kinship,genetic diversity,and genetic structure between them by specific length amplified fragment sequencing(SLAF-seq).Finally,470725 polymorphic SLAF tags and 58622 valid SNP markers were *** analysis showed that 61 samples were classified into 2 clusters:wild populations and cultivated populations,and some wild yews were categorized into the cultivated populations;the genetic diversity analysis showed that the Nei diversity index of wild populations(0.4068)was smaller than that of cultivated populations(0.4414),and the polymorphic information content(PIC)of wild populations(0.2861)was smaller than that of cultivated populations(0.3309).The genetic differentiation analysis showed that the total populations of gene diversity(H_(t))of cultivated and wild populations were respectively 0.8159 and 0.5685,the coefficient of gene differentiation(G_(st))of cultivated and wild populations was respectively 0.3021 and 0.1068,and the gene flow(N_(m))(2.4967)of wild populations was larger than cultivated populations(0.8199).The molecular variance(AMOVA)revealed that inter-population variation accounted for 29.57%of the total genetic variation,while intra-population variation accounted for 70.42% of the total genetic variation(plization of SLAF-seq technolog

关键词： T.cuspidata SLAF-seq SNP wild population cultivated population genetic structure

Laser speckle contrast imaging to predict the effect of temporary spinal cord stimulation in postherpetic neuralgia patients: A prospective observational study

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Journal of Innovative Optical Health Sciences 2024年第1期17卷 69-75页

作者： Xiang Huang Dacheng Tang Pan Chen Lumiao Chen xiaohong li Xiaoping Wang Department of Pain Management The First A±liated Hospital Jinan University Guang ZhouGuangdong 510630P.R.China Department of Pain Management The First People's Hospital of Foshan Foshan City Guangdong 528000P.R.China

Temporary spinal cord stimulation(tSCS)can effectively reduce the pain and severity of postherpetic neuralgia(PHN).However,there are no effective and objective methods for predicting the effects of tSCS on *** speckle contrast imaging(LSCI)is frequently used in neurology to evaluate the effectiveness of *** assess the accuracy of LSCI in predicting the impact of tSCS on PHN,14 adult patients receiving tSCS treatments for spinal nerve-innervated(C6-T2)PHN participated in this observational *** analog scale(VAS)assessments and LSCI bloodflow images of the-ngers were recorded after the tSCS *** results showed that the VAS scores of all patients decreased ***,the bloodflow index(BFI)values were signi-cantly higher than they were before the *** bloodflow and pain alleviation were positively ***-ndings indicated that spinal nerve PHN(C6-T2)was signi-cantly reduced by *** alleviation by tSCS was positively correlated with increased bloodflow in the *** effect of tSCS on PHN may thus be predicted using an independent and consistent indicator such as LSCI.

关键词： Laser speckle contrast imaging temporary spinal cord stimulation postherpetic neuralgia

Association of interpregnancy interval and risk of adverse pregnancy outcomes in woman by different previous gestational ages

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Chinese Medical Journal 2024年第1期137卷 87-96页

作者： Peiran Chen Yi Mu Zheng liu Yanping Wang xiaohong li li Dai Qi li Mingrong li Yanxia Xie Juan liang Jun Zhu National Office for Maternal and Child Health Surveillance of China West China Second University HospitalSichuan UniversityChengduSichuan 610066China Department of Obstetrics West China Second University HospitalSichuan UniversityChengduSichuan 610066China Key Laboratory of Birth Defects and Related Diseases of Women and Children Ministry of EducationSichuan UniversityChengduSichuan 610066China

Background:With an increasing proportion of multiparas,proper interpregnancy intervals(IPIs)are urgently ***,the association between IPIs and adverse perinatal outcomes has always been *** study aimed to explore the association between IPIs and adverse outcomes in different fertility policy periods and for different previous gestational ***:We used individual data from China’s National Maternal Near Miss Surveillance System between 2014 and *** Poisson models with restricted cubic splines were *** adverse outcome was analyzed separately in the overall model and stratified *** stratified models included different categories of fertility policy periods(2014-2015,2016-2017,and 2018-2019)and infant gestational age in previous pregnancy(livery[VD]and 1.10[1.03,1.19]for cesarean section[CS]),low Apgar scores and small for gestational age(SGA),and a decreased risk of diabetes mellitus in pregnancy,preeclampsia or eclampsia,and gestational hypertension.A long IPI(≥60 months)was associated with an increased risk of preterm birth(OR[95%CI]:1.18[1.11,1.26]for VD and 1.39[1.32,1.47]for CS),placenta previa,postpartum hemorrhage,diabetes mellitus in pregnancy,preeclampsia or eclampsia,and gestational *** policy changes had little effect on the association of IPIs and adverse maternal and neonatal *** estimated risk of preterm birth,low Apgar scores,SGA,diabetes mellitus in pregnancy,and gestational hypertension was more profound among women with previous term births than among those with preterm births or pregnancy ***:For pregnant women with shorter or longer IPIs,more targeted health care measures during pregnancy should be formulated according to infant gestational age in

关键词： Interpregnancy interval Fertility policy Gestational age Preterm birth Gestational hypertension Diabetes mellitus in pregnancy

Nickel-catalyzed arylcyanation of alkenes via cyano group translocation: access to 1,n-dinitriles or 4-amino nitriles

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Science China Chemistry 2024年

作者： xiaohong li Shenfan Wang Xiangxiang Fu Donghui Xing Zeyuan Fu Yuanfu Deng Huanfeng Jiang liangbin Huang State Key Laboratory of Pulp and Paper Engineering School of Chemistry and Chemical Engineering South China University of Technology

Herein, a nickel-catalyzed arylcyanation of unactivated alkenes via cyano group translocation with aryl boronic acids has been developed. These transformations provided a robust approach to constructing structurally diverse 1,n-dinitriles or 4-amino nitriles from easily prepared and commercially available starting materials. The cyano group translocation was achieved,involving the addition into the intramolecular C–N triple bond followed by the retro-Thorpe reaction. Mechanistic studies revealed that high temperature and CsHCO3as the base were crucial for the cyano group translocation.

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石墨炔基S型异质结构建及平米级光催化产氢

Science China Materials 2024年第2期67卷 493-503页

作者：杨成李小红靳治良 School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyKey Laboratory for Chemical Engineering and TechnologyState Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021China

石墨炔由于其高载流子迁移率和有序的孔隙结构被认为是一种很有应用前景的光催化材料.本研究通过交叉偶联合成了一种新型球状石墨炔,并与棒状Mn_(0.2)Cd_(0.8)S耦合构建了S型异质结用于光催化析氢.结果表明,Mn_(0.2)Cd_(0.8)S/石墨炔异... 详细信息

石墨炔由于其高载流子迁移率和有序的孔隙结构被认为是一种很有应用前景的光催化材料.本研究通过交叉偶联合成了一种新型球状石墨炔,并与棒状Mn_(0.2)Cd_(0.8)S耦合构建了S型异质结用于光催化析氢.结果表明,Mn_(0.2)Cd_(0.8)S/石墨炔异质结光催化剂表现出优异的光催化活性,产氢性能分别较Mn_(0.2)Cd_(0.8)S和球形石墨炔单体催化剂提升了16.78和613.2倍.同时,该催化剂应用于平米级规模产氢取得较好效果.其优异的光催化活性可归因于石墨炔的独特性能及S-scheme异质结的有效构建.通过紫外光电子能谱、原位辐射X射线光电子能谱、电子顺磁共振能谱、密度泛函理论计算和其他表征技术探究了S-scheme异质结的形成和光催化活性的增强.该工作可为石墨炔的形貌可调性制备以及高效异质结光催化剂的设计和合成提供新参考.

关键词： spherical graphdiyne Mn_(0.2)Cd_(0.8)S DFT S-scheme heterojunction square meter-scale photocatalytic hydrogen production

Modulation of polymerization rate of N-carboxyanhydrides in a biphasic system

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Chinese Chemical Letters 2024年第1期35卷 326-331页

作者： Guonan Ji Xuetao Zheng Xiangdie Hou Xiao Sun Shijie Wang xiaohong li Jianjun Cheng Ziyuan Song Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Research Center for Industries of the Future Westlake UniversityHangzhou 310030China School of Engineering Westlake UniversityHangzhou 310030China The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

The recent advances in accelerated polymerization of N-carboxyanhydrides (NCAs) offer an effective strategy to simplify the preparation of polypeptide materials. However, the fine-tuning of polymerization kinetics, which is critical to differentiate the main polymerization and the side reactions, remains largely unexplored. Herein we report the modulation of polymerization rate of NCA in a water/oil biphasic system. By altering the aqueous pH, the initial location of the initiators, and the pK_(a) of initiating amines, we observed the change in polymerization time from several minutes to a few hours. Due to the high interfacial activity and low pKa value, controlled polymerization was observed from multi-amine initiators even if they were initially located in the aqueous phase. This work not only improves our understanding on the biphasic polymerization mechanism, but also facilitates preparation of versatile polypeptide materials.

关键词： N-Carboxyanhydrides Polypeptides Biphasic system Cooperative covalent polymerization Polymerization kinetics

农户数字素养对化学农药减量使用的影响及其机制研究

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中国软科学 2024年第2期 64-73页

作者：张鹏李小红吴雨西南财经大学经济学院四川成都611130 西南财经大学经济与管理研究院四川成都611130 南京农业大学金融学院江苏南京210095 西南财经大学《经济学家》编辑部四川成都610074

推进农药减量化是全方位夯实粮食安全根基,加快农业绿色发展的必然要求。本文立足于我国农业绿色转型和数字经济快速发展的实践背景,探讨分析了农户数字素养对其化学农药减量使用的影响。本文基于中国家庭金融调查数据,构建了农户数字... 详细信息

推进农药减量化是全方位夯实粮食安全根基,加快农业绿色发展的必然要求。本文立足于我国农业绿色转型和数字经济快速发展的实践背景,探讨分析了农户数字素养对其化学农药减量使用的影响。本文基于中国家庭金融调查数据,构建了农户数字素养指数,发现农户数字素养提升会显著促使其农药使用减量。从农药使用的三个重要环节施药者、施药机械选择和施药技术出发,探索了这种影响的内在机制,发现了数字素养提升可以帮助农户树立绿色生产理念、选择高效施药机械、学习科学施药技术。异质性分析表明,数字素养对小规模种植户、未转入耕地的农户、所在村没有农业职业经理人的农户的农药使用减量边际效应更显著。本文的边际贡献在于,提供了数字技术介入对农户生产决策行为的影响效果,揭示了农户数字素养对农药使用决策的重要性。在推进农业农村现代化和大力实施乡村振兴战略的背景下,本文的研究结论为促进绿色农业发展和保障粮食安全提供了微观基础和有益启示。

关键词：农药减量数字素养绿色农业粮食安全

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PISA的新进展分析及其启示

教育科学 2024年第3期40卷 31-37页

作者：李小红李珍王克志北京师范大学中国基础教育质量监测协同创新中心北京100875

建设具有中国特色的教育评价体系是我国新时代教育评价改革的重要目标。PISA是全球最具代表性、体系完善和影响深远的国际教育评估项目之一,分析其在价值取向、测评内容、测评方式和结果应用等方面的进展,有助于发展和完善我国教育评价... 详细信息

建设具有中国特色的教育评价体系是我国新时代教育评价改革的重要目标。PISA是全球最具代表性、体系完善和影响深远的国际教育评估项目之一,分析其在价值取向、测评内容、测评方式和结果应用等方面的进展,有助于发展和完善我国教育评价体系。研究发现,PISA不仅关注测评的经济主义价值,还兼顾人文主义价值,注重学生综合素养的发展;在学科测评上,以学生素养发展为导向,背景问卷测评指标全面涵盖影响学生发展的因素;在测评方式上,计算机化程度加深,以自适应技术的应用促进个性化测评的实现;在测评数据上,公开类型增加,测评结果应用场景愈发多样化。据此,我国应始终秉持教育性价值导向,立足时代需求和国家实际,适当拓展测评内容,运用新技术优化测评方式,引导多主体参与测评结果的多元应用,以加快完善我国基础教育质量监测评价体系。

关键词： PISA 人文主义转向素养导向创新型测评教育评价体系

热处理对同质异态TC17钛合金线性摩擦焊接头的影响

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材料导报 2024年第8期38卷 181-185页

作者：常川川李菊李晓红金俊龙张传臣季亚娟中国航空制造技术研究院航空焊接/连接技术航空科技重点实验室北京100024 北京市摩擦焊接工艺与装备工程中心北京100024

对TC17(α+β)和TC17(β)钛合金进行线性摩擦焊及焊后热处理试验,运用光学显微镜(OM)、扫描电镜(SEM)观察接头各区域的微观组织变化,采用轮廓法测试接头残余应力分布情况,分析了热处理对接头的微观组织、残余应力及力学性能的影响。结... 详细信息

对TC17(α+β)和TC17(β)钛合金进行线性摩擦焊及焊后热处理试验,运用光学显微镜(OM)、扫描电镜(SEM)观察接头各区域的微观组织变化,采用轮廓法测试接头残余应力分布情况,分析了热处理对接头的微观组织、残余应力及力学性能的影响。结果表明:焊接过程中焊缝区发生了相变及动态再晶界过程,形成亚稳定β相;两侧热力影响区初生α相严重变形,针状α相完全溶解。经过热处理,亚稳定β相分解为稳定的α+β相,板条状α相在晶界析出,针状α相在晶粒内部析出,变形α相发生不同程度的分解。轮廓法测试结果表明,接头沿振动方向的应力呈双峰分布,接头热力影响区处拉应力峰值达到最大约360 MPa,焊缝中心拉应力值约140 MPa,经过热处理,接头沿振动方向拉应力值降低至50 MPa以下。经过热处理后接头微观组织更加均匀,并且接头残余应力得到消除,接头拉伸及疲劳性能得到明显改善。

关键词： TC17钛合金线性摩擦焊残余应力焊后热处理力学性能

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栉风沐雨七十载砥砺前行续华章

北京水务 2024年第S1期 1-3页

作者：黎小红北京市官厅水库管理处河北张家口075441

围绕十八大以来官厅水库运行管理和水安全保障的新形势新要求,在回顾官厅水库建成70周年以来的主要功能变化与水环境演变历程的基础上,锚定2035年官厅水库恢复饮用水源功能目标,提出多措并举、多源共济、多管齐下等确保水质、水量及生... 详细信息

围绕十八大以来官厅水库运行管理和水安全保障的新形势新要求,在回顾官厅水库建成70周年以来的主要功能变化与水环境演变历程的基础上,锚定2035年官厅水库恢复饮用水源功能目标,提出多措并举、多源共济、多管齐下等确保水质、水量及生态安全措施,以新作为、新担当进一步加强水利工程运行管理职能,为首都高质量发展和市民高品质生活提供水务基本运行保障。

关键词：官厅水库功能恢复饮用水源水安全保障高质量发展