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Effects of interactions between arbuscular mycorrhizal fungi and bacteria on the growth of Lotus corniculatus L.:From the perspective of regulating rhizosphere fungal community

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Pedosphere 2024年第2期34卷 411-423页

作者： Qing ZHANG Jin CHEN Yingyue LI Tao HUANG Kailing XIE Jing ZHOU Xiaoyu LI Schools of Life Sciences Anhui Agricultural UniversityHefei 230036China National Engineering Laboratory of Crop Stress Resistance Breeding Anhui Agricultural UniversityHefei 230036China Anhui Province Key Laboratory of Crop Biology Anhui Agricultural UniversityHefei 230036China

Arbuscular mycorrhizal fungi(AMF)provide essential nutrients to crops and are affected by ***-solubilizing bacteria(PSB),nitrogen-fixing bacteria(NFB),and AMF have mutually beneficial relationships with plants,but the effects of their interactions on plant growth by regulating rhizosphere fungal community have not been sufficiently *** this study,a greenhouse pot experiment was conducted to investigate the interactions between AMF and bacteria(PSB and NFB)on the growth of Lotus corniculatus ***,the role of rhizosphere fungal community in the growth of Lotus corniculatus *** explored using Illumina MiSeq high-throughput *** results showed that combined inoculation of AMF with PSB and NFB increased plant biomass,plant height,and fungal colonization *** richness,complexity,and stability of rhizosphere fungal community also increased after combined inoculation of AMF with PSB and/or NFB,particularly with *** addition,combined inoculation of AMF with PSB and NFB enriched the abundance of beneficial microorganisms,with Chaetomium and Humicola showing the greatest *** structural equation model showed that the interactions of AMF with PSB and NFB promoted plant growth by affecting fungal network structure and soil enzyme activities involved in carbon,nitrogen,and phosphorus *** findings provide evidence for the effects of interactions of AMF with PSB and NFB on rhizosphere fungal community and plant growth.

关键词： colonization intensity colonization rate combined inoculation enzyme activity network structure nitrogen-fixing bacteria phosphatesolubilizing bacteria

Transition of plasticity and fracture mode of Zr-Al-Ni-Cu bulk metallic glasses with network structures

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Transactions of Nonferrous Metals Society of China 2015年第8期25卷 2617-2623页

作者：蔡安辉丁大伟安伟科周果君罗云李江鸿彭勇宜湖南理工学院机械工程学院岳阳414000 中南大学粉末冶金国家重点实验室长沙410083 中国科学院物理研究所北京100190 中南大学物理与电子学院长沙410083

Effect of network structure on plasticity and fracture mode of Zr？Al？Ni？Cu bulk metallic glasses （BMGs） was investigated. The microstructures of transversal and longitudinal sections were exposed by chemical etching and observed by scanning electron microscopy （SEM）. The mechanical properties were examined by room-temperature uniaxial compression test. The results show that both plasticity and fracture mode are significantly affected by the network structure and the alteration occurs when the size of the network structure reaches up to a critical value. When the cell size （dc） of the network structure is ~3μm, Zr-based BMGs characterize in plasticity that decreases with increasingdc. The fracture mode gradually transforms from single 45° shear fracture to double 45° shear fracture and then cleavage fracture with increasingdc. In addition, the mechanisms of the transition of the plasticity and the fracture mode for these Zr-based BMGs are also discussed.

关键词： bulk metallic glass plasticity fracture mode network structure

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航空网络结构和组织模式的演变

PREPARATION OF POLYALKYLCYANOACRYLATE NANOPARTICLES WITH VARIOUS MORPHOLOGIES

地理 2024年第3期

作者：王帮娟刘承良

由于航空运输受到国家政策和地缘政治区域内部制定的不同航空法律的影响，不同国家和地区的航空发展具有明显差异性，与其他国家航空进行对比研究可以为中国航空建设和发展提供借鉴和参考。因此，基于1999年、2009年和2019年的航空客运... 详细信息

由于航空运输受到国家政策和地缘政治区域内部制定的不同航空法律的影响，不同国家和地区的航空发展具有明显差异性，与其他国家航空进行对比研究可以为中国航空建设和发展提供借鉴和参考。因此，基于1999年、2009年和2019年的航空客运数据，本文从网络拓扑结构、网络连通性、空间结构和组织模式四个方面对中国、美国和欧洲的航空网络进行了比较分析。研究发现：①中美欧航空网络规模均呈现扩张态势，表现出“小世界网络”特征和双幂律分布特点，无标度特征不明显，航空运距呈现非连续的波动下降趋势，遵循一定的距离衰减规律。②航空网络连通性欧洲和美国空间分布相对均衡，而中国分布相对集中，航空枢纽的形成受到地理位置、行政等级、经济、旅游、航空公司总部布局和政策等因素的多重影响。不同等级的航线联系均呈现典型的“金字塔型”等级层次结构，航空客流均倾向于向少数城市对间集聚。③中美欧均表现出一定的轴—辐网络组织模式，美国和欧洲地区航空网络轴辐体系已较为完善，呈现出多中心、多轴线网络体系的特点；中国呈现由双中心向多中心的演进态势，但支线航空发展不足。最后，本文提出了一些政策建议，旨在为中国未来民航客运发展提供科学参考。

关键词：拓扑结构航空网络网络结构组织模式地域系统比较研究 topological structure airline network network structure organizational model regional system comparative analysis

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Chinese Journal of Polymer Science 2011年第3期29卷 336-341页

作者：李贺先 Key Laboratory of Functional Polymer Materials Ministry of EducationInstitute of Polymer Chemistry Nankai University

The effects of various reaction conditions on the preparation of polyalkylcyanoacrylate （PACA） nanoparticles are studied. The PACA nanoparticles with different crosslinking degrees and morphology are prepared. Addition of crosslinkers can not only adjust the particle size, but also change the morphology of PACA nanoparticles. Moreover, the loose network structure of the PACA nanoparticles with ＂core/shell-like＂ morloholozv is investizated by AFM and TEM in detail.

关键词： Nanoparticles Biodegradability PACA network structure Drug carriers.

Synthesis,Crystal structure and Fluorescence Property of [Y(sip)(H_2O)_4]_n with 5-Sulfoisophthalate Ligand

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1057-1062页

作者： WANG Yan PAN Zhao-Rui WANG Zuo-Wei HU Zheng LI Yi-Zhi ZHENG He-Gen Coordination Chemistry Institute State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210093 China Key Laboratory for Mesoscopic Chemistry. of Ministry of Education College of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China Fujian Institute of Research on the structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The title complex, [Y（sip）（H2O）4], （sip = 5-sulfoisophthalate）, has been synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray analysis. The crystal belongs to the orthorhombic system, space group Pna21, a = 7.235（4）, b = 16.456（5）, c = 10.316（3） A, V = 1228.2（9） A^3, Z = 4, Mr = 404.14, Dc = 2.186 g/cm63, F（000） = 808,μ= 4.979 mm^-1, the final R = 0.0474 and wR = 0.1125 for 2122 observed reflections with I 〉 2σ（I）. The structural analysis shows that the intermolecular hydrogen bonds and π-π interactions result in a three-dimensional supramolecular structure. The complex shows intense luminescence in solid state at room temperature.

关键词： crystal structure hydrogen bond network structure luminescence

Spider web-like carbonized bacterial cellulose/MoSe_(2) nanocomposite with enhanced microwave attenuation performance and tunable absorption bands

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Nano Research 2021年第3期14卷 738-746页

作者： Zhengjian Xu Man He Yuming Zhou Shuangxi Nie Yongjuan Wang Yao Huo Yifan Kang Ruili Wang Ran Xu Hao Peng Xi Chen Jiangsu Optoelectronic Functional Materials and Engineering Laboratory School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing211189China Guangxi Key Laboratory of Clean Pulp&Papermaking and Pollution Control College of Light Industry and Food EngineeringGuangxi UniversityNanning530004China

It is essential to manufacture microwave absorbers with strong absorption as well as tunable absorption bands at a low filler ***,it remains challenging for pure biomass material to reach this goal without loading other ***_(2),as a transition metal chalcogenide with semiconductor properties,has emerged as a potential microwave absorber ***,bacterial cellulose(BC)-derived carbon nanofibers/MoSe_(2) nanocomposite was fabricated and phosphoric acid was used to dope phosphorus in BC,in which MoSe_(2) microspheres were dropped on the BC network like a dew-covered spider *** unique network structure enhances conductive loss and multiple reflections of the incident *** collocation of BC and MoSe_(2) is helpful to impedance match and introduces interfacial/dipolar polarization loss;moreover,the P-doping of BC helps to tune the absorption ***,the optimal reflection loss of undoped one reaches−53.33 dB with only 20 wt.%filler content,whose main absorption peaks focus on ***,after the P-doping of BC,the main absorption peaks move to Ku-band and the optimal reflection loss gets stronger(−66.84 dB)with the same filler *** absorption and tunable absorption bands can be realized,and thus wide frequency range is *** work is expected to enlighten future exploration of biomass carbon materials on high-performance microwave absorption materials.

关键词： bacterial cellulose MoSe_(2) network structure P-doped carbon tunable absorption band

Differential function analysis: identifying structure and activation variations in dysregulated pathways

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Science China(Information Sciences) 2017年第1期60卷 116-131页

作者： Chuanchao ZHANG Juan LIU Qianqian SHI Tao ZENG Luonan CHEN State Key Laboratory of Software Engineering School of Computer Wuhan University Key Laboratory of Systems Biology Innovation Center for Cell Signaling Network Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences

Complex diseases are generally caused by the dysregulation of biological functions rather than individual molecules. Hence, a major challenge of the systematical study on complex diseases is how to capture the differentially regulated biological functions, e.g., pathways. The traditional differential expression analysis(DEA) usually considers the changed expression values of genes rather than functions. Meanwhile, the conventional function-based analysis(e.g., PEA: pathway enrichment analysis) mainly considers the varying activation of functions but disregards the structure change of genetic elements of functions. To achieve precision medicine against complex diseases, it is necessary to distinguish both the changes of functions and their elements from heterogeneous dysregulated pathways during the disease development and progression. In this work, in contrast to the traditional DEA, we developed a new computational framework, namely differential function analysis(DFA), to identify the changes of element-structure and expression-activation of biological functions, based on comparative non-negative matrix factorization(cN MF). To validate the effectiveness of our method, we tested DFA on various datasets, which shows that DFA is able to effectively recover the differential element-structure and differential activation-score of pre-set functional groups. In particular, the analysis of DFA on human gastric cancer dataset, not only capture the changed network-structure of pathways associated with gastric cancer, but also detect the differential activations of these pathways(i.e., significantly discriminating normal samples and disease samples), which is more effective than the state-of-the-art methods, such as GSVA and Pathifier. Totally,DFA is a general framework to capture the systematical changes of genes, networks and functions of complex diseases, which not only provides the new insight on the simultaneous alterations of pathway genes and pathway activations, but a

关键词： complex disease biological function non-negative matrix factorization network structure function activation

Pomegranate micro/nano hierarchical plasma structure for superior microwave absorption

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Nano Research 2022年第10期15卷 8688-8696页

作者： Chunyan Ding Tao Wu Xinsen Hu Chengshuai Shao Zhipeng Xu Hui Fu Songsong Wu Guangwu Wen Xiaoxiao Huang School of Materials Science and Engineering Shandong University of TechnologyZibo 255000China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Shandong Industrial Ceramics Research&Design Institute Co. Ltd.Zibo 255000China Shandong Institute of Advanced Ceramic Co. Ltd.Zibo 255000China

Inspired by the pomegranate natural artful structure,pomegranate micro/nano hierarchical plasma configuration of Fe/Fe3C@graphitized carbon(FFC/pCL)was constructed based on the green sol-gel method and in-situ chemical vapor deposition(CVD)synthesis ***-like FFC/pCL successfully overcame the agglomeration phenomenon of magnetic nanoparticles with each seed of the pomegranate consisting of Fe/Fe_(3)C as cores and graphitized carbon layers as *** high-density arrangement of magnetic nanoparticles and the design of pomegranate-like heterostructures lead to enhanced plasmon ***,the pomegranate-like FFC/pCL achieved a great electromagnetic wave(EMW)absorbing performance of 6.12 GHz wide band absorption at a low mass adding of only 16.7 wt.%.Such excellent EMW performance can be attributed to its unique pomegranate hierarchical plasma configuration with separated nanoscale iron cores,surface porous texture,and good carbon conductive *** investigation provides a new paradigm for the development of magnetic/carbon based EMW absorbing materials by taking advantage of pomegranate hierarchical plasma configuration.

关键词： electromagnetic wave absorption low filler loading carbon shell network structure magnetic Fe/Fe3C

Effects of ZnO,FeO and Fe_(2)O_(3)on the spinel formation,microstructure and physicochemical properties of augite-based glass ceramics

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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1207-1216页

作者： Shuai Zhang Yanling Zhang Shaowen Wu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Augite-based glass ceramics were synthesised using ZnO,FeO,and Fe_(2)O_(3)as additives,and the spinel formation,matrix structure,crystallisation thermodynamics,and physicochemical properties were *** results showed that oxides resulted in numerous preliminary spinels in the glass ***,ZnO,and Fe_(2)O_(3)influenced the formation of spinel,while FeO simplified the glass *** and ZnO promoted bulk crystallisation of the parent *** adding oxides,the grains of augite phase were refined,and the relative quantities of augite crystal planes were also *** samples displayed good mechanical properties and chemical *** 2wt%ZnO-doping sample displayed the maximum flexural strength(170.3 MPa).Chromium leaching amount values of all the samples were less than the national standard(1.5 mg/L),confirming the safety of the *** conclusion,an appropriate amount of zinc-containing raw material is beneficial for the preparation of augite-based glass ceramics.

关键词： spinel network structure thermodynamics microstructure glass ceramics