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Science China Chemistry 2024年第2期67卷 568-575页

作者： jiasheng Qian li-Cai liu Zhi-Hao Chen Yuan liu Yin li Qingjiang li Honggen Wang Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical SciencesSun Yat-Sen UniversityGuangzhou510006China

α-Functionalized organoborons are useful building blocks and key structural elements in functional *** previous synthesis relied on the famous Matteson reaction or the late-stage borylative modification of alkynes or ***,the synthetic transformation of borylated building blocks offers another useful strategy and is currently actively *** report herein that B(MIDA)-propargylic alcohols(BPAs) are a useful type of borylated building *** two complementary functional group handles(alkyne and hydroxyl) in close proximity,the redox-neutral [3,3] and [2,3] sigmatropic rearrangements of BPAs allow the efficient synthesis of several types of α-functionalized boronates,including α,β-unsaturated acylborons,α-S/P-substituted allenylborons,boryl-substituted thiazoles and a borylated α,β-unsaturated hydrazine,some of which are otherwise challenging targets using other synthetic methods.

关键词： organoboron diverse synthesis sigmatropic rearrangement heteroarene amide

The complete mitochondrial genome of Parachiloglanis hodgarti and its phylogenetic position within Sisoridae

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Journal of Oceanology and limnology 2023年第1期41卷 267-279页

作者： jiasheng li Ying PENG Shufei ZHANG Yifan liU Kun ZHANG Jian CHEN Hua ZHANG Chi ZHANG Bingjian liU National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization Zhejiang Ocean UniversityZhoushan 316022China Institute of Fisheries Science Tibet Academy of Agricultural and Animal Husbandry SciencesLhasa 850000China Guangdong Provincial Key Laboratory of Fishery Ecology and Environment/South China Sea Fisheries Research Institute Chinese Academy of Fisheries SciencesGuangzhou 510300China Key Laboratory of Tropical Marine Bio-resources and Ecology Chinese Academy of SciencesGuangzhou 510301China

The complete mitogenome of Parachiloglanis hodgarti was sequenced and characterized,which is the first mitogenome of the genus Parachiloglanis within *** mitogenome is 16511-bp long and included 13 protein-coding genes,22 transfer RNAs,two ribosomal RNAs,and one control *** genome composition was A+T biased(58.64%)and exhibited a positive AT-skew(0.095)and a negative GC-skew(-0.283).Compared with other Sisoridae fishes,the characteristics of nucleotide skews,codon usage,and amino acid usage of the *** mitogenome are more similar to those of non-Glyptosternoid ***,the phylogenetic trees show that Sisoridae fishes fall into four major clades and ***(CladeⅠ)is basal to the Sisoridae family,forming a sister clade to the Glyptosternoids(CladeⅣ).The topological structures constructed in this study raised doubts over the traditional classification *** results will help better understand the feature s of the *** mitogenome and provide a reference for further phylogenetic research on Sisoridae species.

关键词： Parachiloglanis hodgarti mitogenomes Sisoridae glyptosternoids phylogenetic relationship

水稻早衰突变体psl4(t)的表型鉴定及基因定位

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西南大学学报（自然科学版） 2024年第2期46卷 44-51页

作者：龚晓平何焕然莫春红李加胜陈锐张致力孙小红勾治琴罗挺重庆市渝东南农业科学院重庆涪陵408000

水稻叶片早衰严重影响水稻的产量与品质,挖掘水稻叶片早衰相关基因并解析其分子机制,对提高水稻产量具有重要意义.从涪恢9802和LR杂交后代中筛选到叶早衰突变体psl4(t),该突变体6叶期前叶片呈正常绿色,从7叶期至剑叶(倒1叶)期每张叶片... 详细信息

水稻叶片早衰严重影响水稻的产量与品质,挖掘水稻叶片早衰相关基因并解析其分子机制,对提高水稻产量具有重要意义.从涪恢9802和LR杂交后代中筛选到叶早衰突变体psl4(t),该突变体6叶期前叶片呈正常绿色,从7叶期至剑叶(倒1叶)期每张叶片均是从叶尖至叶中部逐渐衰老,叶片的叶绿体发育受阻其体积变小、光合色素质量分数减少,叶片提前衰老.农艺性状分析结果表明:与野生型相比,突变体psl4(t)的穗长、有效分蘖数和籽粒宽变化无统计学意义,而株高、每穗粒数、结实率及千粒质量显著降低.遗传分析结果发现:突变体psl4(t)的早衰性状受单隐性核基因控制,利用分子标记将目标基因定位于第4染色体长臂端两个SSR标记(RM17004和RM17006)之间38.5 kb的范围内.研究为psl4(t)基因的克隆及功能解析、早衰分子机制研究奠定基础.

关键词：水稻早衰突变体psl4(t) 遗传分析基因定位

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船舶轴系纵向振动特性预报软件设计与实现

船舶 2024年第4期35卷 75-84页

作者：刘义峰李解卢闫张正艺吴均云李家盛华中科技大学船舶与海洋工程学院武汉430074 船舶数据技术与支撑软件湖北省工程研究中心武汉430074 船舶和海洋水动力湖北省重点实验室武汉430074 上海船舶设备研究所上海200031

为实现船舶轴系纵向振动固有特性的预报,该文基于QT平台开发了一款预报软件。软件的核心求解器采用MATLAB语言编写,求解算法采用霍尔兹法,并与ANSYS软件仿真结果、某实际轴系纵向振动计算结果进行了对比验证。在此基础上,探讨了不同轴... 详细信息

为实现船舶轴系纵向振动固有特性的预报,该文基于QT平台开发了一款预报软件。软件的核心求解器采用MATLAB语言编写,求解算法采用霍尔兹法,并与ANSYS软件仿真结果、某实际轴系纵向振动计算结果进行了对比验证。在此基础上,探讨了不同轴系参数变化情况下,轴系纵振特性的变化规律。结果表明:影响轴系纵振固有特性的参数主要有曲拐半径、曲臂厚度、推力轴承纵向刚度和材料弹性模量,相关的研究成果可为船舶轴系减振降噪提供参考。

关键词：船舶轴系纵振固有特性 QT平台 MATLAB软件 ANSYS软件

Relative vibration identification of cutter and workpiece based on improved bidimensional empirical mode decomposition

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Frontiers of Mechanical Engineering 2020年第2期15卷 227-239页

作者： jiasheng li Xingzhan li Wei WEI Pinkuan liU School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of Machinery Manufacturing Technology China Academy of Engineering PhysicsChengdu 610200China

In the process of cutting,the relative vibration between the cutter and the workpiece has an important effect on the surface *** this study,the bidimensional empirical mode decomposition(BEMD)method is used to identify such *** to Riesz transform theory,a type of isotropic monogenic signal is *** boundary data is extended on the basis of a similarity principle that deals with serious boundary effect *** decomposition examples show that the improved BEMD can effectively solve the problem of boundary effect and decompose the original machined surface topography at multiple *** characteristic surface topography representing the relative vibration between the cutter and the workpiece through feature identification is *** addition,the spatial spectrum analysis of the extracted profile is carried *** decimal part of the frequency ratio that has an important effect on the shape of the contour can be accurately identified through contour extraction and spatial spectrum *** decomposition results of simulation and experimental surface morphology demonstrate the validity of the improved BEMD algorithm in realizing the relative vibration identification between the cutter and the workpiece.

关键词： bidimensional empirical mode decomposition spatial spectrum analysis boundary effect vibration identification surface topography

Interfacial Oxygen Octahedral Coupling-Driven Robust Ferroelectricity in Epitaxial Na_(0.5)Bi_(0.5)TiO_(3)Thin Films

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Research 2024年第2期2023卷 149-157页

作者： Haojie Han Qinghua Zhang Wei li Yiqun liu jiasheng Guo Yue Wang Qian li lin Gu Ce-Wen Nan Jing Ma State Key Laboratory of New Ceramics and Fine Processing Schoolof Materials Science and EngineeringTsinghua UniversityBeijing 100084China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

The oxygen octahedral rotation(OOR)forms fundamental atomic distortions and symmetries in perovskite oxides and definitely determines their properties and ***,epitaxial strain and interfacial structural coupling engineering have been developed to modulate the OOR patterns and explore novel properties,but it is difficult to distinguish the 2 ***,different symmetries are induced in Na_(0.5)Bi_(0.5)TiO_(3)(NBT)epitaxial films by interfacial oxygen octahedral coupling rather than epitaxial *** NBT film grown on the Nb:SrTiO_(3)substrate exhibits a paraelectric tetragonal phase,while with La_(0.5)Sr_(0.5)MnO_(3)as a buffer layer,a monoclinic phase and robust ferroelectricity are obtained,with a remanent polarization of 42μC cm^(-2)and a breakdown strength of 7.89 MV cm^(-1),which are the highest record among NBT-based ***,the interfacial oxygen octahedral coupling effect is demonstrated to propagate to the entire thickness of the film,suggesting an intriguing long-range *** work provides a deep insight into understanding the structure modulation in perovskite heterostructures and an important avenue for achieving unique functionalities.

关键词： effect. interfacial coupling

Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting

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Journal of Materials Science & Technology 2011年第9期27卷 831-840页

作者： Weiguo Jiang jiasheng Dong li Wang Langhong Lou Institute of Metal Research Chinese Academy of Sciences Shenyang-110016 China

Four castings with different modulus have been designed to simulate different thickness sections of a turbine blade during casting process. The microstructure has been observed by optical microscopy （OM） and scanning electron microscopy （SEM）. The micro-segregation was tested by energy dispersive spectroscopy （EDS） and the macro-segregation was analyzed by using Metalscan 2500 spectrometers. The experimental results show that the microstructure of casting is affected by modulus apparently. The smaller the modulus, the finer the microstructure. The average grain size of castings with modulus of 0.29, 1.57, 3.10 and 5.0 mm is 0.3, 1.5, 2.7 and 4.3 mm, and the volume fraction of eutectic is 0, 0.1%, 0.2% and 1.0%, respectively. The micro/macro segregation is affected by the modulus apparently. The smaller the modulus, the lower the segregation level. When the modulus of casting increases, the content of AI increases, while the content of W, Cr and Mo decreases both in inner grain and near grain boundary. The content of AI and Mo in inner grain is higher than that near grain boundary, while the content of Cr and W in inner grain is lower than that near grain boundary.

关键词： Superalloy Turbine blade Casting modulus Microstructure Segregation

Review of blue perovskite light emitting diodes with optimization strategies for perovskite film and device structure

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Opto-Electronic Advances 2021年第2期4卷 19-47页

作者： Zongtao li Kai Cao jiasheng li Yong Tang Xinrui Ding Binhai Yu National&Local Joint Engineering Research Center of Semiconductor Display and Optical Communication Devices South China University of TechnologyGuangdong 510640China Foshan Nationstar Optoelectronics Company Ltd. Foshan 528000China

Perovskite light emitting diodes(PeLEDs)have attracted considerable research attention because of their external quantum efficiency(EQE)of>20%and have potential scope for further ***,compared to red and green PeLEDs,blue PeLEDs have not been extensively investigated,which limits their commercial applications in the fields of luminance and full-color *** this review,blue-PeLED-related research is categorized by the composition of *** main challenges and corresponding optimization strategies for perovskite films are ***,the novel strategies for the design of device structures of blue PeLEDs are reviewed from the perspective of transport layers and interfacial ***,future directions for blue PeLEDs are *** review can be a guideline for optimizing perovskite film and device structure of blue PeLEDs,thereby enhancing their development and application scope.

关键词： perovskite light emitting diodes perovskite film device structure blue LEDs

Acceptor-planarized typeⅠphotosensitizer for lipid droplet-targeted two-photon photodynamic therapy by ferroptosis

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Science China Chemistry 2024年第7期67卷 2392-2402页

作者： Jie Sha Weimin liu jiasheng Wu Yanping Wang Xuewei li Haohui Ren Zhi Pang Wenjun Zhang Chun-Sing Lee Pengfei Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials CityU-CAS Joint Laboratory of Functional Materials and DevicesTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Center of Super-Diamond and Advanced Films&Department of Materials Science and Engineering City University of Hong KongHong KongChina

Two-photon photodynamic therapy(TP-PDT)has garnered significant attention because of its excellent depth of tissue penetration and high spatiotemporal ***,the limited targeting ability and oxygen dependency of photosensitizers(PSs)significantly hinder the effectiveness of photodynamic therapy in hypoxic tumor ***,we designed and synthesized two lipid droplet(LD)-targeted two-photon PSs(TBPCP and TBCP)by reducing benzene rings to achieve“acceptor planarization”.Notably,acceptor planarization not only enhanced the intramolecular charge transfer but also transferred the photochemical reaction from typeⅡ(TBPCP)to typeⅠ(TBCP).Under the irradiation of 940 nm femtosecond pulsed laser,TBPCP and TBCP showed bright two-photon-excited fluorescence and excellent LD targeting in living *** TBPCP(typeⅡPS),the outstanding TP-PDT efficacy of TBCP(typeⅠPS)under hypoxic conditions could be obtained in both cellular experiments and multicellular tumor spheroids(MCTS)***,both TBPCP and TBCP could induce the lipid peroxidation in the typeⅠor typeⅡPDT due to the location of LD,depleting GSH and inactivating GPX4 to induce nonprogrammed ferroptosis in cells.

关键词： two-photon photodynamic therapy lipid droplet targeting acceptor planarization hypoxia tumor ferroptosis

Trade-offs between the accumulation of cuticular wax and jasmonic acid-mediated herbivory resistance in maize

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Journal of Integrative Plant Biology 2024年第1期66卷 143-159页

作者： Jiong liu Lu li Zhilong Xiong Christelle AMRobert Baozhu li Shan He Wenjie Chen jiasheng Bi Guanqing Zhai Siyi Guo Hui Zhang Jieping li Shutang Zhou Xi Zhang Chun‐Peng Song School of life Sciences Henan UniversityKaifeng 475004China State Key Laboratory of Crop Stress Adaptation and Improvement Henan UniversityKaifeng 475004China State Key Laboratory of Cotton Bio‐Breeding and Integrated Utilization Henan UniversityKaifeng 475004China Sanya Institute of Henan University Sanya 572025China Institute of Plant Sciences University of BernBern 3013Switzerland

Plants have evolved complex physical and chemical defense systems that allow them to withstand herbivory *** of a complex mixture of very-long-chain fatty acids(VLCFAs)and their derivatives,cuticular wax constitutes the first physical line of defense against ***,we report the function of Glossy 8(ZmGL8),which encodes a 3-ketoacyl reductase belonging to the fatty acid elongase complex,in orchestrating wax production and jasmonic acid(JA)-mediated defenses against herbivores in maize(Zea mays).The mutation of GL8 enhanced chemical defenses by activating the JA-dependent *** observed a trade-off between wax accumulation and JA levels across maize glossy mutants and 24 globally collected maize inbred *** addition,we demonstrated that mutants defective in cuticular wax biosynthesis in Arabidopsis thaliana and maize exhibit enhanced chemical *** transcriptomic and lipidomic analyses indicated that the gl8 mutant confers chemical resistance to herbivores by remodeling VLCFA-related lipid metabolism and subsequent JA biosynthesis and *** results suggest that VLCFA-related lipid metabolism has a critical role in regulating the trade-offs between cuticular wax and JA-mediated chemical defenses.

关键词： cuticular wax fall armyworm herbivore resistance jasmonic acid maize plant-herbivore interactions