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Telomere-to-telomere genome of the allotetraploid legume Sesbania cannabina reveals transposon-driven subgenome divergence and mechanisms of alkaline stress tolerance

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Science China(Life Sciences) 2024年第1期67卷 149-160页

作者： Haofei Luo Xiaofei Wang Changqing You xuedan wu Duofeng Pan Zhiyao Lv Tong Li Dongmei Zhang Zhongbao Shen Xiaodong Zhang Guodao Liu Kaixuan He Qingtong Ye Yajun Jia Qinghua Zhao Xian Deng Xiaofeng Cao Xianwei Song Gai Huang State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Hainan Yazhou Bay Seed Lab Sanya 572025China University of Chinese Academy of Sciences Beijing 100049China Institute of Forage and Grassland Sciences Heilongjiang Academy of Agricultural SciencesHarbin 150086China Shandong Academy of Agricultural Sciences Jinan 250100China National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land Dongying 257345China Shandong Green Manure Ecological Technology Co. LtdDongying 257345China State Key Laboratory of Tropical Crop Breeding Chinese Academy of Tropical Agricultural SciencesHaikou 571101China

Alkaline soils pose an increasing problem for agriculture worldwide,but using stress-tolerant plants as green manure can improve marginal ***,we show that the legume Sesbania cannabina is very tolerant to alkaline conditions and,when used as a green manure,substantially improves alkaline *** understand genome evolution and the mechanisms of stress tolerance in this allotetraploid legume,we generated the first telomere-to-telomere genome assembly of *** spanning~2,087 *** assembly included all centromeric regions,which contain centromeric satellite repeats,and complete chromosome ends with telomeric *** genome analysis distinguished A and B subgenomes,which diverged approximately 7.9 million years *** genomic analysis revealed that the chromosome homoeologs underwent large-scale inversion events(>10 Mb)and a significant,transposon-driven size expansion of the chromosome 5A *** further identified four specific alkali-induced phosphate transporter genes in ***;these may function in alkali tolerance by relieving the deficiency in available phosphorus in alkaline *** work highlights the significance of *** as a green tool to improve marginal lands and sheds light on subgenome evolution and adaptation to alkaline soils.

关键词： Sesbania cannabina alkaline stress telomere-to-telomere genome legume green manure phosphate transporter allotetraploid

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Morphological and molecular evidence for natural hybridization between Sorbus pohuashanensis and S. discolor (Rosaceae)

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Journal of Forestry Research 2024年第4期35卷 189-201页

作者： Yuxia wu xuedan Yu Wei Tang Wenhua Yang Qidi Fu Yongqi Zheng Chuanhong Zhang State Key Laboratory of Tree Genetics and Breeding Research Institute of ForestryChinese Academy of ForestryBeijing 100091People’s Republic of China Beijing Waiyan Online Digital Technology Co. LtdBeijing 100081People’s Republic of China Huabanlv Nature Enlightenment Education Technology Co. LtdBeijing 100010People’s Republic of China

In overlapping distribution areas of Sorbus pohuashanensis and *** in North China(Mount Tuoliang,Mount Xiling and Mount Baihua),Sorbus indi-viduals were found with pink fruit,which have never been recorded for the flora of *** morphological characters combined with four chloroplast DNA markers and internal transcribed spacer(ITS)were used to analyze the origin of the Sorbus individuals with pink fruits and their relationship to *** and ***,SDA and one-way(taxon)ANOVA of morphological characters provided convincing evidence of the hybrid ori-gin of Sorbus individuals with pink fruits based on a novel morphological character and many intermediate *** analysis based on four cpDNA markers showed that either *** or *** were maternal parents of Sorbus individuals with pink ***-ence of the position of Sorbus individuals with pink fruits between cpDNA and ITS in cluster trees supported by DNA sequence comparative analysis,implying former hybridiza-tion events between *** and ***-tiple hybridization events between *** and *** might have contributed to the generation of Sorbus individuals with pink *** study has provided insights into hybridization between species of the same genus in sympatric areas,which is of great significance for the study of interspecific hybridization.

关键词： Hybridization ITS Chloroplast DNA Morphological characters Sorbus

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指导深度学习提升学生政治核心素养探研

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成才之路 2020年第13期 25-26页

作者：吴雪丹江苏省宜兴市丁蜀高级中学江苏宜兴214200

在高中政治教学过程中,教师要指导学生进行深度学习,提升学生的政治学科核心素养。提炼明线、暗线,形成逻辑线索;采用调整和整合的方式,构建科学体系;挖掘隐性知识,链接外显知识,拓展学科视界。这些方法都能让学生展开深度学习,加深学... 详细信息

在高中政治教学过程中,教师要指导学生进行深度学习,提升学生的政治学科核心素养。提炼明线、暗线,形成逻辑线索;采用调整和整合的方式,构建科学体系;挖掘隐性知识,链接外显知识,拓展学科视界。这些方法都能让学生展开深度学习,加深学生对政治知识的理解,促使学生提升政治学科核心素养。

关键词：深度学习高中政治核心素养思想政治教育

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青藤碱N-四氮唑和N-噁二唑杂环衍生物的设计与合成

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有机化学 2023年第7期43卷 2506-2518页

作者：武学丹徐瑞祥方霄龙张克华金杰安徽建筑大学材料与化学工程学院功能分子设计与界面过程重点实验室合肥230601

建立了两个新的合成路线,在青藤碱D环的N原子上构建了N-四氮唑和N-1,3,4-噁二唑取代的杂环衍生物,共获得了34个新的青藤碱杂环衍生物.以青藤碱为原料,通过溴化氰取代生成N-CN青藤碱,再与叠氮化钠通过1,3-偶极环加成反应,生成了N-四氮唑... 详细信息

建立了两个新的合成路线,在青藤碱D环的N原子上构建了N-四氮唑和N-1,3,4-噁二唑取代的杂环衍生物,共获得了34个新的青藤碱杂环衍生物.以青藤碱为原料,通过溴化氰取代生成N-CN青藤碱,再与叠氮化钠通过1,3-偶极环加成反应,生成了N-四氮唑青藤碱.苄氯类试剂与四氮唑发生取代反应生成青藤碱N-四氮唑杂环衍生物;酰氯类试剂与四氮唑通过酰化反应和惠思根重排反应生成青藤碱N-1,3,4-噁二唑杂环衍生物.方法简单,条件温和,产率优良.此工作为天然产物结构修饰提供了新的方法,扩大了青藤碱衍生物库,为潜在的青藤碱药物活性研究提供了药物分子设计方法.

关键词：青藤碱四氮唑噁二唑衍生物杂环

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3-羰基-4-氮杂-△^5-雄甾烯-17-肟衍生物的合成及其抑制5α-还原酶活性研究

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化学学报 2009年第13期67卷 1487-1491页

作者：吴学丹刘东志周雪琴杨雄文朱孔明天津大学化工学院天津300072

以雄甾-4-烯-3,17-二酮(AD)为起始原料,合成了14个甾体17位肟醚和肟酯类新化合物.所合成的化合物结构均经过MS,1HNMR谱确证,并对所合成的化合物进行了老鼠5α-还原酶抑制生物活性初步评价.结果表明:受试化合物均有一定的5α-还原酶抑制... 详细信息

以雄甾-4-烯-3,17-二酮(AD)为起始原料,合成了14个甾体17位肟醚和肟酯类新化合物.所合成的化合物结构均经过MS,1HNMR谱确证,并对所合成的化合物进行了老鼠5α-还原酶抑制生物活性初步评价.结果表明:受试化合物均有一定的5α-还原酶抑制活性,其中化合物5a,5c,5d有较高的5α-还原酶抑制活性,与参比药物Espristeride相当.

关键词： 4-氮杂-17-取代甾体 5α-还原酶抑制剂合成

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Ballistic performances of the hourglass lattice sandwich structures under high-velocity fragments

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Defence Technology（防务技术） 2024年第1期31卷 312-325页

作者： He-xiang wu Jia Qu Lin-zhi wu Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin150001China School of Civil Engineering Northeast Forestry UniversityHarbin150040China

In this paper,the numerical simulation method is used to study the ballistic performances of hourglass lattice sandwich structures with the same mass under the vertical incidence of *** is paid to elucidating the influences of rod cross-section dimensions,structure height,structure layer,and rod inclination angle on the deformation mode,ballistic performances,and ability to change the ballistic direction of *** results show that the ballistic performances of hourglass lattice sandwich structures are mainly affected by their structural *** this respect,structural parameters optimization of the hourglass lattice sandwich structures enable one to effectively improve their ballistic limit velocity and,consequently,ballistic performances.

关键词： Hourglass lattice sandwich structures Ballistic performances high-velocity Finite element analysis

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Resilience-incorporated seismic risk assessment of precast concrete frames with“dry”connections

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 403-425页

作者： wu Chenhao Tang Yuchuan Cao Xuyang wu Gang Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Nanjing 211102China Department of Civil and Environmental Engineering University of CaliforniaLos AngelesCA 90095USA School of Civil Engineering Southeast UniversityNanjing 211102China College of Civil and Transportation Engineering Hohai UniversityNanjing 210024China

A resilience-incorporated risk assessment framework is proposed and demonstrated in this study to manifest the advantageous seismic resilience of precast concrete frame(PCF)structures with“dry”connections in terms of their low damage and rapid *** framework integrates various uncertainties in the seismic hazard,fragility,capacity,demand,loss functions,and post-earthquake *** this study,the PCF structures are distinguished from ordinary reinforced concrete frame(RCF)structures by characterizing multiple limit states for the PCF based on its unique damage ***,probabilistic story-wise pushover analyses are performed to yield story-wise capacities for the predefined limit *** the seismic resilience analysis,a step-wise recovery model is proposed to idealize the functionality recovery process,with separate considerations of the repair and non-repair *** recovery model leverages the economic loss and downtime to delineate the stochastic post-earthquake recovery curves for the resilience loss *** such,contingencies in the probabilistic post-earthquake repairs are incorporated and the empirical judgments on the recovery parameters are largely *** proposed framework is demonstrated through a comparative study between two“dry”connected PCFs and one RCF designed as alternative structural systems for a prototype *** results from the risk quantification indicate that the PCFs show reduced loss hazards and lower expected losses relative to the ***,the PCF equipped with energy dissipation devices at the“dry”connections largely reduces the expected economic loss,downtime,and resilience loss by 29%,56%,and 60%,respectively,compared to the RCF.

关键词： precast concrete frame non-emulative precast system seismic resilience seismic risk functional recovery

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New findings on the influence of El Nino events on tropical cyclone formation

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Science China Earth Sciences 2024年第3期67卷 892-893页

作者： Liguang wu Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China

Tropical cyclones typically form over warm tropical and subtropical ocean surfaces, as their formation and intensification rely primarily on the energy provided by the ocean. Pioneering research by Gray (1968) revealed that the formation of tropical cyclones requires the sea surface temperature (SST) to be no less than 26.5℃. Consequently, SST is commonly recognized as a crucial parameter among the environmental factors influencing tropical cyclone formation(Gray, 1979;Emanuel and Nolan, 2004).

关键词： tropical cyclone ocean

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Two-dimensional semiconductor heterostructures for photocatalytic CO_(2)conversion

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Science China Chemistry 2024年第8期67卷 2434-2447页

作者： Yang wu Mingyu wu Yongfu Sun Yi Xie Hefei National Research Center for Physical Sciences at Microscale University of Science and Technology of ChinaHefei 230026China

The CO_(2)reduction into carbon-contained fuel via solar energy offers the powerful tools to realize the zero-emission carbon *** to the intriguing features of the two-dimensional(2D)heterostructures,it is susceptible to modulate the electronic structure as well as the surface geometry for optimizing the photocatalytic CO_(2)*** this perspective,we surveyed the fundamental insights of 2D semiconductor heterostructures,involving the fabrication strategies and classification of the 2D semiconductor ***,we have detailly discussed the overview of 2D semiconductor heterostructure for optimizing CO_(2)photocatalytic influenced factors,including the solar energy utilization,photogenerated carriers separation,and redox reaction ***,we showed the significant advantages of 2D heterostructures in elevating CO_(2)photoreduction performance,focusing on activity,selectivity and *** analyzing the limitations and developments,we ended by putting forward insights into the further researches about the CO_(2)photocatalysts and reactor design,even industrial applications.

关键词： two-dimensional semiconductor heterostructures photocatalysis CO_(2)conversion

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Two-layer autonomous intelligence dynamic trajectory planning method based on shield-tunnel ring-geology interactions

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Underground Space 2024年第6期19卷 227-250页

作者： Min Hu Bingjian wu Huiming wu Liefeng Pei SILC Business School Shanghai UniversityShanghai 201800China SHU-SUCG Research Centre for Building Industrialization Shanghai 201800China Shanghai Tunnel Engineering Co. Ltd.Shanghai 200032China

To solve the problem that current attitude planning methods do not fully consider the interaction and constraints among the shield,segmental tunnel ring,and geology,and cannot adapt to the changes in the actual engineering environment,or provide feasible long-term and short-term attitude planning,this paper proposes autonomous intelligent dynamic trajectory planning(AI-DTP)to provide tunnel ring and centimeter-layer planning targets for a self-driving shield to meet long-term accuracy and short-term ***-DTP introduces the Frenet coordinate system to solve the problem of inconsistent spatial representation of tunnel data,segmental tunnel ring location,and surrounding geological conditions,designs the long short-term memory attitude prediction model to accurately predict shield attitude change trend based on shield,tunnel,and geology,and uses a heuristic algorithm for trajectory ***-DTP provides ring-layer and centimeter-layer planning objectives that meet the needs of long-term accuracy and short-term correction of shield attitude *** the Hangzhou-Shaoxing Intercity Railroad Tunnel Project in China,the‘‘Zhiyu”shield equipped with the AI-DTP system was faster and more accurate than the manually controlled shield,with a smoother process and better quality of the completed tunnel.

关键词： Shield tunnel Trajectory planning Attitude control Self-driving Machine learning

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