检索结果-南通市图书馆

Identification of the Concealed Structures in the Beiya Area of Western Yunnan

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2015年第5期89卷 1779-1780页

作者： WANG Qiao yang Jian YAO Wen yang junbo Chengdu Center of China Geological Survey The School of Geophysics Chengdu University of Technology

The interpretation of regional gravity and magnetic data, especially the extracted information about concealed targets and structures, provide important evidence for geological structure research, oil-gas resource assessment, mineral potential forecast and prospective area delineation. Several interpretation methods have been proposed to determine structural boundary, including vertical derivative, horizontal first-order derivative, total horizontal derivative, total gradient modulus, tilt derivative, and theta graph, and each have their advantages and disadvantages. This study used the tilt derivate method to obtain bouguer gravity anomalies in the Beya area, as shown in Fig. 1a.

关键词： Identification of the Concealed Structures in the Beiya Area of Western Yunnan AMT

The RNA N^(6)-methyladenosine demethylase ALKBH9B modulates ABA responses in Arabidopsis

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2022年第12期64卷 2361-2373页

作者： Jun Tang junbo yang Qiang Lu Qian Tang Shuyan Chen Guifang Jia Synthetic and Functional Biomolecules Center Bejing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Peking-Tsinghua Center for Life Sciences Beijing 100871China

The mRNA modification N^(6)-methyladenosine(m^(6)A)plays vital roles in plant development and biotic and abiotic stress *** RNA m^(6)A demethylase ALKBH9 B can remove m^(6)A in alfalfa mosaic virus RNA and plays roles in alfalfa mosaic virus infection in ***,it is unknown whether ALKBH9 B also exhibits demethylation activity and has a biological role in endogenous plant *** demonstrated here that mRNA m^(6)A modification is induced by the phytohormone abscisic acid(ABA)and that ALKBH9 B has m^(6)A demethylation activity on endogenous *** out ALKBH9 B led to hypersensitivity to ABA treatment during seed germination and early seedling *** further showed that ALKBH9 B removes the m^(6)A modification in the ABA INSENSITIVE 1(ABI1)and BRI1-EMS-SUPPRESSOR 1(BES1)transcripts following ABA treatment,affecting the stability of these ***,we determined that ALKBH9 B acts genetically upstream of the transcription factors ABI3 and ABI5,and its regulatory function in ABA responses depended on ABI3 and *** findings reveal the important roles of the m^(6)A modification in ABA responses and highlight the role of ALKBH9 Bmediated m^(6)A demethylation in regulating ABA responses post-transcriptionally.

关键词： ABA ALKBH9B Arabidopsis demethylase m^(6)A RNA modification

Improving the device performances of two-dimensional semiconducting transition metal dichalcogenides: Three strategies

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2022年第6期17卷 35-50页

作者： Mo Cheng junbo yang Xiaohui Li Hui Li Ruofan Du Jianping Shi Jun He The Institute for Advanced Studies Wuhan UniversityWuhan 430072China Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China

Two-dimensional(2D)semiconductors are emerging as promising candidates for the next-generation *** a type of unique channel materials,2D semiconducting transition metal dichalcogenides(TMDCs),such as MoS2 and WS2,exhibit great potential for the state-of-the-art fieldeffect transistors owing to their atomically thin thicknesses,dangling-band free surfaces,and abundant band *** so,the device performances of 2D semiconducting TMDCs are still failing to reach the theoretical values so far,which is attributed to the intrinsic defects,excessive doping,and daunting contacts between electrodes and *** this article,we review the up-to-date three strategies for improving the device performances of 2D semiconducting TMDCs:(i)the controllable synthesis of wafer-scale 2D semiconducting TMDCs single crystals to reduce the evolution of grain boundaries,(ii)the ingenious doping of 2D semiconducting TMDCs to modulate the band structures and suppress the impurity scatterings,and(iii)the optimization design of interfacial contacts between electrodes and channels to reduce the Schottky barrier heights and contact *** the end,the challenges regarding the improvement of device performances of 2D semiconducting TMDCs are highlighted,and the further research directions are also *** believe that this review is comprehensive and insightful for downscaling the electronic devices and extending the Moore’s law.

关键词： 2D semiconductor transition metal dichalcogenides waferscale single crystal ingenious doping interfacial contact device performance

Arab/c/opste N^(6)-methyladenosine reader CPSF30-L recognizes FUE signals to control polyadenylation site choice in liquid-like nuclear bodies

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2021年第4期14卷 571-587页

作者： Peizhe Song junbo yang Chunling Wang Qiang Lu Linqing Shi Subiding Tayier Guifang Jia Synthetic and Functional Biomolecules Center Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Medical Isotopes Research Center and Department of Radiation MedicineSchool of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China These authors contributed equally to this article.

The biological functions of the epitranscriptomic modification N^(6)-methyladenosine(m^(6)A)in plants are not fully ***30-L is a predominant isoform of the polyadenylation factor CPSF30 and consists of CPSF30-S and an m^(6)A-binding YTH *** is known about the biological roles of CPSF30-L and the molecular mechanism underlying its m^(6)A-binding function in alternative ***,we charac-terized CPSF30-L as an Arabidopsis m^(6)A reader whose m^(6)A-binding function is required for the floral tran-sition and abscisic acid(ABA)*** found that the m^(6)A-binding activity of CPSF30-L enhances the formation of liquid-like nuclear bodies,where CPSF30-L mainly recognizes m*A-modified far-upstream elements to control polyadenylation site *** of CPSF30-L lengthens the 3'untranslated region of three phenotypes-related transcripts,thereby accelerating their mRNA degradation and leading to late flowering and ABA ***,this study uncovers a new molecular mechanism for m^(6)A-driven phase separation and polyadenylation in plants.

关键词： epitranscriptomics N^(6)-methyladenosine(m^(6)A) m^(6)A reader CPSF30-L phase separation alternative polyadenylation(APA)

Plastid RNA editing reduction accompanied with genetic variations in Cymbidium,a genus with diverse lifestyle modes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plant Diversity 2022年第3期44卷 316-321页

作者： Mengqing Zhe Le Zhang Fang Liu Yiwei Huang Weishu Fan junbo yang Andan Zhu Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of Chinese Academy of Sciences Beijing 100049China School of Life Sciences Yunnan UniversityKunmingYunnan 650500China

Recent sequencing efforts have broadly uncovered the evolutionary trajectory of plastid genomes(plastomes)of flowering plants in diverse habitats,yet our knowledge of the evolution of plastid posttranscriptional modifications is *** this study,we generated 11 complete plastomes and performed ultra-deep transcriptome sequencing to investigate the co-evolution of plastid RNA editing and genetic variation in Cymbidium,a genus with diverse trophic *** size and gene content is reduced in terrestrial and green mycoheterotrophic orchids relative to their epiphytic *** could be partly due to extensive losses and pseudogenization of ndh genes for the plastid NADH dehydrogenase-like complex,but independent pseudogenization of ndh genes has also occurred in the epiphyte ***,which was reported to use strong crassulacean acid metabolism *** editing sites are abundant but variable in number among Cymbidium *** nearly twofold variation in editing abundance is mainly due to extensive reduction of ancestral editing sites in ndh transcripts of terrestrial,mycoheterotrophic,and *** *** co-occurrence of editing reduction and pseudogenization in ndh genes suggests functional constraints on editing machinery may be relaxed,leading to nonrandom loss of ancestral edited sites via reduced editing *** study represents the first systematic examination of RNA editing evolution linked to plastid genome variation in a single *** also propose an explanation for how genomic and posttranscriptional variations might be affected by lifestyle-associated ecological adaptation strategies in Cymbidium.

关键词： RNA editing Plastomes ndh genes Lifestyle

Binary blazed grating-based on silicon polarization-independent filter on insulator

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2012年第1期5卷 78-81页

作者： Danhua WU Xin SUI junbo yang Zhiping ZHOU The State Key Laboratory of Advanced Optical Communication Systems and Networks Peking UniversityBeijing 100871China

In this paper, a binary blazed grating-based polarization independent filter on silicon on insulator （SOI） under full conical incidence is presented. The properties of the grating filter are investigated by rigorous coupled-wave analysis. It＇s shown that the filter demonstrates high reflectivity （R 〉 99%） at its resonant wavelength, which stays the same under three different polarization states. It indicates that this grating filter is polarization-independent. The final data shows its polarization-dependent loss （PDL） is only 0.04 dB and the full width at half maximums （FWHMs） of the transverse electric （TE-） and transverse magnetic （TM-） polarized light are 0.24 and 0.46nm, respectively.

关键词： narrow filter binary blazed grating fullconical incidence polarization-independent

Low-bias,high-photoresponsivity SnSe2 nanofilm with an Au split-ring array-based THz detector toward 6G communication

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2023年第6期66卷 311-312页

作者： Qi SONG Zhiwen ZHOU Yifei XU Min ZHANG junbo yang Huawei LIANG Tianwu WANG Peiguang YAN College of Physics and Optoelectronic Engineering Shenzhen University Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information TechnologyLiaocheng University College of Liberal Arts and Sciences National University of Defense Technology GBA Research Institute Aerospace Information Research Institute of Chinese Academy of Science

6G technology with the four characteristics of an intelligent endogenous,secure endogenous,multi-domain convergence,and integrated computing network,will help society toward an intelligent era [1]. The low power consumption and high photoresponsivity of 6G core devices,and particularly the improvement of detector performance,

关键词：

Topological multipolar corner state in a supercell metasurface and its interplay with two-dimensional materials

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2022年第4期10卷 855-869页

作者： Zhaojian Zhang junbo yang Te Du Xinpeng Jiang College of Liberal Arts and Sciences National University of Defense TechnologyChangsha 410073China Center of Material Science National University of Defense TechnologyChangsha 410073China

Second-order topological insulators(SOTIs) have recently attracted much attention due to their capability to support lower-dimensional topological states, namely, the corner states. Here, we demonstrate that properly designed supercell metasurfaces can support photonic corner states, meanwhile further serving as an ideal platform for the implementations of topological polaritons and dynamically reconfigurable corner states by assembling two-dimensional materials. Such metasurfaces consist of an array of finite-sized SOTIs mimicking the twodimensional Su–Schrieffer–Heeger model. We reveal that the topological transition happens in unit cells without the bandgap, and nondegenerate multipolar corner states emerge in the supercell metasurface due to the inter-and intrasupercell coupling effects. Especially since these corner states are above the light line of the metasurface, we realize the collective stimulation of the two dipolar corner states and their superposition state via far-field excitation. By stacking monolayer hexagonal boron nitride film onto the metasurface, we further achieve the topological phonon polaritons through the strong coupling between the corner state and the phonon, which is confirmed by the Rabi splitting as well as anticrossing behavior emerging in the transmission ***, we reveal the robustness of the corner state and strong coupling by introducing defects into the metasurface. Finally, tunable corner state and strong coupling with on-demand control are realized by assembling monolayer graphene onto the metasurface. Our theoretical study proposes a unique hybrid-material platform for topological polaritonics and reconfigurable topological photonics, which can promote large-area topological applications in practice.

关键词： polar while corner

Nuclear phylogenomics of Asteraceae with increased sampling provides new insights into convergent morphological and molecular evolution

在线全文

学校读者我要写书评

暂无评论

Plant Communications 2024年第6期5卷 117-138页

作者： Guojin Zhang junbo yang Caifei Zhang Bohan Jiao JoséL.Panero Jie Cai Zhi-Rong Zhang Lian-Ming Gao Tiangang Gao Hong Ma College of Life Sciences Hunan Normal UniversityChangshaHunan 410081China Department of Biology the Huck Institute of the Life Sciencesthe Pennsylvania State UniversityState CollegePA 16801USA State Key Laboratory of Plant Diversity and Specialty Crops Institute of BotanyChinese Academy of SciencesBeijing 100093China Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Wuhan Botanical Garden and Sino-Africa Joint Research Center Chinese Academy of SciencesWuhan 430074China Department of Integrative Biology University of TexasAustinTX 78712USA CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Lijiang National Forest Biodiversity National Observation and Research Station Kunming Institute of BotanyChinese Academy of SciencesLijiangYunnan 674100China

Convergent morphological evolution is widespread in flowering plants,and understanding this phenomenon relies on well-resolved *** phylogenetic reconstruction using transcriptome datasets has been successful in various angiosperm groups,but it is limited to taxa with available fresh ***,which are one of the two largest angiosperm families and are important for both ecosystems and human livelihood,show multiple examples of convergent *** Asteraceae phylogenies have resolved relationships among most subfamilies and many tribes,but many phylogenetic and evolutionary questions regarding subtribes and genera remain,owing to limited ***,we increased the sampling for Asteraceae phylogenetic reconstruction using transcriptomes and genome-skimming datasets and produced nuclear phylogenetic trees with 706 species representing two-thirds of recognized *** character reconstruction supports multiple convergent evolutionary events in Asteraceae,with gains and losses of bilateral floral symmetry correlated with diversification of some subfamilies and smaller groups,*** of the calyx-related pappus may have been especially important for the success of some subtribes and *** evolutionary analyses support the likely contribution of duplications of MADS-box and TCP floral regulatory genes to innovations in floral morphology,including capitulum inflorescences and bilaterally symmetric flowers,potentially promoting the diversification of *** divergences and reductions in CYC2 gene expression are related to the gain and loss of zygomorphic *** phylogenomic work with greater taxon sampling through inclusion of genome-skimming datasets reveals the feasibility of expanded evolutionary analyses using DNA samples for understanding convergent evolution.

关键词： sunflower family floral symmetry florets capitulescence molecular clock ancestral character pappus subtribe MADS-box TCP CYC2 gene family gene expression