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247篇 您的检索式:作者名="Liqiang Li"
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1Encapsulating segment-like antimony nanorod in hollow carbon tube as long-lifespan,high-rate anodes for rechargeable K-ion batteries显示文摘K-ion battery (KIB) is a new-type energy storage device that possesses potential advantages of low-cost and abundant resource of potassium.To develop advanced electrode materials for accommodating the large size and high activity of potassium ion is of great interests.Herein,a segment-like antimony (Sb) nanorod encapsulated in hollow carbon tube electrode material (Sb@HCT) was prepared.Beneficial from the virtue of abundant nitrogen doping in carbon tube,one-dimensional and hollow structure advantages,Sb@HCT exhibits excellent potassium storage properties:in the case of potassium bis(fluorosulfonyl)imide (KFSI) electrolyte,Sb@HCT displays a reversible capacity of up to 453.4 mAh·g^-1 at a current density of 0.5 A·g^-1 and good rate performance (a capacity of 211.5 mAh·g^-1 could be achieved at an ultrahigh rate of 5 A·g^-1).Additionally,Sb@HCT demonstrates excellent long-cycle stability at a current density of 2 A·g^-1 over 120 cycles.Meanwhile,electrolyte optimization is an effective strategy for greatly improving electrochemical performance.Through ex-situ characterizations,we disclosed the potassiation of Sb anode is quite reversible and undergoes multistep processes,combining solid solution reaction and two-phase reaction.Wen Luo Feng Li Weiran Zhang Kang Han Jean-Jacques Gaumet Hans-Eckhardt Schaefer Liqiang Mai 2019Nano Research2019,12,5:18
2Quasi-real-time simulation of rotating drum using discrete element method with parallel GPU computing显示文摘Real-time simulation of industrial equipment is a huge challenge nowadays. The high performance and fine-grained parallel computing provided by graphics processing units (GPUs) bring us closer to our goals. In this article, an industrial-scale rotating drum is simulated using simplified discrete element method (DEM) without consideration of the tangential components of contact force and particle rotation. A single GPU is used first to simulate a small model system with about 8000 particles in realtime, and the simulation is then scaled up to industrial scale using more than 200 GPUs in a 1D domain-decomposition parallelization mode. The overall speed is about 1/11 of the real-time. Optimization of the communication part of the parallel GPU codes can speed up the simulation further, indicating that such real-time simulations have not only methodological but also industrial implications in the near future.Ji Xu Huabiao Oi Xiaojian Fang Liqiang Lu Wei Ge Xiaowei Wang Ming xu Feiguo Chen xianfeng He Jinghai Li 2011Particuology2011,9,4:16
3Toxicity of graphene oxide and multi-walled carbon nanotubes against human cells and zebrafish显示文摘Graphene possesses unique physical and chemical properties, which have inspired a wide range of potential biomedical applications. However, little is known about the adverse effects of graphene on the human body and ecological environment. The purpose of our work is to make assessment on the toxicity of graphene oxide (GO) against human cell line (human bone marrow neuroblastoma cell line and human epithelial carcinoma cell line) and zebrafish (Danio rerio) by comparing the toxic effects of GO with its sister, multi-walled carbon nanotubes (MWNTs). The results show that GO has a moderate toxicity to organisms since it can induce minor (about 20%) cell growth inhibition and slight hatching delay of zebrafish embryos at a dosage of 50 mg/L, but did not result in significant increase of apoptosis in embryo, while MWNTs exhibit acute toxicity leading to a strong inhibition of cell proliferation and serious morphological defects in developing embryos even at relatively low concentration of 25 mg/L. The distinctive toxicity of GO and MWNTs should be ascribed to the different models of interaction between nanomaterials and organisms, which arises from the different geometric structures of nanomaterials. Collectively, our work suggests that GO does actual toxicity to organisms posing potential environmental risks and the result is also shedding light on the geometrical structure-dependent toxicity of graphitic nanomaterials.CHEN LiQiang HU PingPing ZHANG Li HUANG SiZhou LUO LingFei HUANG ChengZhi 2012Science China Chemistry2012,55,10:12
4Hydrochemical characteristics and recharge sources of Lake Nuoertu in the Badain Jaran Desert显示文摘We present a case study of physical and chemical indicators and isotope characteristics of Lake Nuoertu,one of the largest and deepest lakes of the Badain Jaran Desert.We analyze the concentrations of eight ions,total dissolved solids,and stable isotope composition of the lake and groundwater,as well as radioactive isotope tritium concentration in groundwater.The results show that annual and seasonal variations of the physical and chemical characteristics of Lake Nuoertu water are significantly greater than those of groundwater.The lake is uniformly mixed in the horizontal and vertical directions,and the hydrochemical types of the lake at different depths are consistent for Na–Cl–CO3–(SO4).Stable isotope composition of the lake and groundwater at Nuoertu is distributed along the local evaporation line(EL)slope,which is less than the slope of the global meteoric water line.The comparatively small slope shows the characteristic strong evaporation in the study area.Lake water isotopes are mostly in the upper right corner of the EL,whereas groundwater is mostly in the lower left corner.The main recharge source of Nuoertu lake water is groundwater,in combination with lake water and groundwater level change.The age of tufa springs around Nuoertu is about75–80 a,which shows that the initial recharge source of the lake is a mix between modern and 1952 or older;however,further research is required.Yue Wu Naiang Wang Liqiang Zhao Zhenyu Zhang Li Chen Ying Lu Xiaonan L Jinlong Chang 2014Chinese Science Bulletin2014,59,9:12
5Sisyphus effects in hydrogen electrochemistry on metal silicides enabled by silicene subunit edge显示文摘Nonmetal elements strictly govern the electrochemical performance of molybdenum compounds.Yet,the exact role played by nonmetals during electrocatalysis remains largely obscure.With intermetallic MoSi_2comprising silicene subunits,we present an unprecedented hydrogen evolution reaction(HER)behavior in aqueous alkaline solution.Under continuous operation,the HER activity of MoSi_2shows a more than one order of magnitude improvement in current density from 1.1 to 21.5 mA cm^(à2)at 0.4 V overpotential.Meanwhile,this activation behavior is highly reversible,such that voltage withdrawal leads to catalyst inactivation but another operation causes reactivation.Thus,the system shows dynamics strikingly analogous to the legendary Sisyphus’labor,which drops and recovers in a stepwise manner repeatedly,but never succeeds in reaching the top of the mountain.Isomorphic WSi_2behaves almost the same as MoSi_2,whereas other metal silicides with silicyne subunits,including CrSi_2and TaSi_2,do not exhibit any anomalous behavior.A thin amorphous shell of MoSi_2is observed after reaction,within which the Si remains partially oxidized while the oxidation state of Mo is basically unchanged.First-principles calculations further reveal that the adsorption of hydroxide ions on silicene subunit edges and the subsequent Si vacancy formation in MoSi_2jointly lead to the anomalous HER kinetics of the adjacent Mo active centers.This work demonstrates that the role of nonmetal varies dramatically with the electronic and crystallographic structures of silicides and that silicene structural subunit may serve as a promoter for boosting HER in alkaline media.Zechao Zhuang Yong Li Jiazhao Huang Zilan Li Kangning Zhao Yunlong Zhao Lin Xu Liang Zhou Lyudmila V. Moskaleva Liqiang Mai 2019Science Bulletin2019,64,9:12
6Porous nitrogen-doped carbon/MnO coaxial nanotubes as an efficient sulfur host for lithium sulfur batteries显示文摘As a promising candidate for next generation energy storage devices, lithium sulfur (Li-S) batteries still confrant rapid capacity degradation and low rate capability. Herein, we report a well-architected porous nitrogen-doped carbon/MnO coaxial nanotubes (MnO@PNC) as an efficient sulfur host material. The host shows excellent electron conductivity, sufficient ion transport channels and strong adsorption capability for the polysulfides, resulting from the abundant nitrogen-doped sites and pores as well as MnO in the carbon shell of MnO@PNC. The MnO@PNC-S composite electrode with a sulfur content of 75 wt.% deliveries a specific capacity of 802 mAh·g^-1 at a high rate of 5.0C and outstanding cycling stability with a capacity retention of 82% after 520 cycles at 1.0C.Chao Lin Longbing Qu Jiantao Li Zhengyang Cai Haoyun Liu Pan He Xu Xu Liqiang Mai 2019Nano Research2019,12,1:10
7Titanium nitride hollow nanospheres with strong lithium polysulfide chemisorption as sulfur hosts for advanced lithium-sulfur batteries显示文摘因为他们的高理论的特定的能力和精力密度,锂硫电池正在答应电气化学的精力存储设备。一位理想的硫主人应该拥有高电导率并且拥抱物理监禁或强壮的化学吸着戏剧性地压制 polysulfide 溶解。此处,有 ~ 的一条平均直径的一致的听空 nanospheres 160 nm 为高效的锂硫电池作为高度有效的锂 polysulfide 水库被报导了。联合锂 polysulfides 套住的高传导性和化学药品, 70 wt.% 硫内容在的获得的 S/TiN 阴极合成在 0.5C 和 1.0C 交付了优秀长寿骑车表演超过 300 个周期。更重要地, 710.4 mAhChuanchuan Li Jingjing Shi Lin Zhu Yingyue Zhao Jun Lu Liqiang Xu 2018Nano Research2018,11,8:9
8Alpl prevents bone ageing sensitivity by specifically regulating senescence and differentiation in mesenchymal stem cells显示文摘Mutations in the liver/bone/kidney alkaline phosphatase(Alpl) gene cause hypophosphatasia(HPP) and early-onset bone dysplasia,suggesting that this gene is a key factor in human bone development. However, how and where Alpl acts in bone ageing is largely unknown. Here, we determined that ablation of Alpl induces prototypical premature bone ageing characteristics, including bone mass loss and marrow fat gain coupled with elevated expression of p16^(INK4A)(p16) and p53 due to senescence and impaired differentiation in mesenchymal stem cells(MSCs). Mechanistically, Alpl deficiency in MSCs enhances ATP release and reduces ATP hydrolysis. Then, the excessive extracellular ATP is, in turn, internalized by MSCs and causes an elevation in the intracellular ATP level, which consequently inactivates the AMPKα pathway and contributes to the cell fate switch of MSCs. Reactivating AMPKα by metformin treatment successfully prevents premature bone ageing in Alpl+/-mice by improving the function of endogenous MSCs.These results identify a previously unknown role of Alpl in the regulation of ATP-mediated AMPKα alterations that maintain MSC stemness and prevent bone ageing and show that metformin offers a potential therapeutic option.Wenjia Liu Liqiang Zhang Kun Xuan Chenghu Hu Shiyu Liu Li Liao Bei Li Fang Jin Songtao Shi Yan Jin 2018Bone Research2018,6,4:9
9Hierarchical porous metal ferrite ball-in-ball hollow spheres: General synthesis, formation mechanism, and high performance as anode materials for Li-ion batteries显示文摘CoFe 的高收益<潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class=“ a-plus-plus ”> 4 , NiFe <潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class=“ a-plus-plus ”> 4 和 CdFe <潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class=“ a-plus-plus ”> 4 层次多孔的 ball-in-ball 空范围用锻烧跟随的热水的合成被完成了。形成的机制被显示包含一在里面 situ 碳模板的过程。层次多孔的 CoFe < 潜水艇 class= “ a-plus-plus ” > 2 O < 潜水艇 class= “ a-plus-plus ” > 4 有壳的不同数字的空范围能被改变合成条件获得。产生 CoFe 的电气化学的性质 < 潜水艇 class= “ a-plus-plus ” > 2 O < 潜水艇 class= “ a-plus-plus ” > 4 个 电极被比较了,用不同文件夹。同样获得的 CoFe <潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class=“ a-plus-plus ”> 4 和 NiFe <潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class=“ a-plus-plus ”> 4 有相对高的可逆分泌物能力和好率保留性能它在锂离子电池用作阳极材料使他们成为有希望的材料。Shouli Li Aihua Li Ranran Zhang Yanyan He Yanjun Zhai Liqiang Xu 2014Nano Research2014,7,8:9
10Genetic diversity,population structure,and relationships of apricot(Prunus)based on restriction site-associated DNA sequencing显示文摘Single-nucleotide polymorphisms(SNPs)are the most abundant form of genomic polymorphisms and are widely used in population genetics research.Here,high-throughput sequencing was used to examine the genome-level diversity,population structure,and relationships of apricot,which are important for germplasm conservation and molecular breeding.Restriction site-associated DNA sequencing(RAD-seq)was adopted to sequence 168 Prunus spp.accessions distributed in five ecological groups,including 74 accessions of cultivated Prunus armeniaca L.and 94 accessions of wild apricots(P.armeniaca L.and Prunus sibirica L.),which generated 417,961 high-quality SNPs.We used cluster,genetic structure,and principal component analyses to examine the genetic diversities and genetic relationships of the 168 accessions.The Dzhungar-Ili ecological group accessions showed the highest genetic diversity in terms of private allele number,observed heterozygosity,and nucleotide diversity.We speculate that the Central Asian ecological group accessions were domesticated from the Dzhungar-Ili ecological group accessions.The population structure and gene flow of the North China and European ecological group accessions suggested a genetic background of P.sibirica.We argue that the two groups should be considered hybrid swarms connected to P.sibirica by continuous and extensive gene flow.P.armeniaca originated in Northwest China(Ili Valley),subsequently spread throughout Central Asia,and eventually spread to Europe.In addition,selective sweep signatures in P.armeniaca during domestication from wild to cultivated apricots,combined with differentially expressed genes,underlie distinct fruit traits,including sugars,aromas,organic acids,and carotenoids.This study provides substantive and valuable genomic resources that will significantly advance apricot improvement and effective utilization.Wenwen Li Liqiang Liu Yanan Wang Qiuping Zhang Guoquan Fan Shikui Zhang Yatong Wang Kang Liao 2020Horticulture Research2020,7,1:9
11Interface-modulated fabrication of hierarchical yolk-shell Co3O4/C dodecahedrons as stable anodes for lithium and sodium storage显示文摘转变金属氧化物(TMO ) 逐渐地为锂离子电池(解放) 和钠离子电池(亲族) 作为阳极材料从研究人员吸引了注意因为他们的高理论的能力。然而,他们的差的骑车稳定性和晚辈评估能力在 lithiation/sodiation 进程和他们的低内在的电子传导性限制期间源于大卷变化他们的应用程序。解决 TMO 的问题,有从金属器官的框架(MOF ) 导出的复杂结构的基于碳的金属氧化物 composites 为解放和亲族作为有希望的电极材料出现了。在这研究,我们采用了一个灵巧的调制接口的方法综合蛋黄壳基于碳的公司 3 O 4 十二面体源于 ZIF-67 zeolitic imidazolate 框架。这策略在热分解过程期间基于在 ZIF-67 核心和基于碳的壳之间的接口分离。唯一的蛋黄壳结构有效地在 lithiation 或 sodiation 期间提供体积扩大,并且碳矩阵改进电极的电的传导性。作为为解放的阳极,蛋黄壳公司 3 O 4/C 十二面体展出一个高特定的能力和优秀骑车稳定性(1,100 mAh 潦?Yuzhu Wu Jiashen Meng Qi Li Chaojiang Niu Xuanpeng wang Wei Yang Wei Li Liqiang Mai 2017Nano Research2017,10,7:8
12Energy storage through intercalation reactions:electrodes for rechargeable batteries显示文摘Electrochemical energy storage has been an important enabling technology for modern electronics of all kinds,and will grow in importance as more electric vehicles and grid-scale storage systems are deployed.We briely review the history of intercalation electrodes and basic concepts pertaining to bateries based on intercalation reactions.hen we summarize how the critical performance metrics—energy density,power density,safety and stability—relate back to electrode materials properties,and how these materials properties are related to fundamental chemical and physical structure relationships highlighted with the most recent research advancement.Challenges and avenues for further research have been highlighted throughout.Robert C.Massé Chaofeng Liu Yanwei Li Liqiang Mai Guozhong Cao 2017National Science Review2017,4,1:8
13Multifractal Analysis of Element Distribution in Skarn-type Deposits in the Shizishan Orefield,Tongling Area,Anhui Province,China显示文摘与进不同 skarn 类型的大约 1000 m 扔的长度从四个练习核心取样的一系列元素集中从 Shizishan orefield 被选择,中央 Tongling,安徽的东南的部分省。用 multifractal 方法,专业和踪迹元素的分发和迁居特征被分析。而踪迹元素的光谱是扭曲权利的,主要元素的 multifractal 光谱是扭曲左的,它证明在 skarn 形成的过程,踪迹元素仅仅局部地被充实,并且主要元素在一个大得多的范围以内搬运。 multifractal 参数的关联系数一( multifractal 光谱的宽度)四项练习,核心是相对低的,但是 multifractal 参数 R (光谱对称参数)的关联系数和 f 相对更高,显示尽管元素的分发的非同类的紧张是不一致的,他们的空间累积模式是几乎一样在形成矿石的过程期间。在不同地点的各种各样的元素的 multifractal 参数的统计证明在 Shizishan orefield 的形成矿石的进程和元素移植模式是一致的,并且踪迹元素的迁居和主要元素展出一些差别。WANG Qingfei DENG Jun WAN Li ZHAO Jie GONG Qingjie YANG Liqiang ZHOU Lei ZHANG Zhijun 2008Acta Geologica Sinica(English Edition)2008,82,4:8
14Novel MOF shell-derived surface modification of Li-rich layered oxide cathode for enhanced lithium storage显示文摘Li-rich layered oxide materials have attracted increasing attention because of their high specific capacity(>250 mAh g^(-1)). However, these materials typically suffer from poor cycling stability and low rate performance. Herein, we propose a facile and novel metal-organic-framework(MOF) shell-derived surface modification strategy to construct NiCo nanodots decorated(~5 nm in diameter) carbon-confined Li_(1.2)Mn_(0.54) Ni_(0.13)Co_(0.13)O_2 nanoparticles(LLO@C&NiCo). The MOF shell is firstly formed on the surface of as-prepared Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 nanoparticles via low-pressure vapor superassembly and then is in situ converted to the NiCo nanodots decorated carbon shell after subsequent controlled pyrolysis.The obtained LLO@C&NiCo cathode exhibits enhanced cycling and rate capability with a capacity retention of 95% after 100 cycles at 0.4 C and a high capacity of 159 mAh g^(-1) at 5 C, respectively, compared with those of LLO(75% and 105 mAh g^(-1)). The electrochemical impedance spectroscopy and selected area electron diffraction analyses after cycling demonstrate that the thin C&NiCo shell can endow LLO with high electronic conductivity and structural stability, indicating the undesired formation of the spinel phase initiated from the particle surface is efficiently suppressed. Therefore, this presented strategy may open a new avenue on the design of high-performance electrode materials for energy storage.Zhitong Xiao Jiashen Meng Qi Li Xuanpeng Wang Meng Huang Ziang Liu Chunhua Han Liqiang Mai 2018Science Bulletin2018,63,1:8
15Concentrating aqueous hydrochloric acid by multiple-effect membrane distillation显示文摘用一个空基于纤维的空气差距膜蒸馏模块的多重效果的膜蒸馏(MEMD ) 试验性地为专注被检验冲淡水盐酸酸。热、冷的馈入温度的效果,和容量的流动在 MEMD 进程的性能上评估的馈入被学习。表演用表演比率(PR ) 被评估,在 HCl (avg ) 和浸透流动(N) 上的水的平均选择。用聚丙烯做的多孔的纤维的二种类型被用来制作 MEMD 模块。试验性的数据显示有高孔的空纤维为 MEMD 过程被比较喜欢。当 feed 集中增加了, PR, avg 和 N 都减少了。当 feed 集中在 12 wt-% 下面时, PR 是 6.09.6, avg 是 10190。当 HCl 的集中到达了 18 wt-% 时, PR 和 avg 分别地是大约 4.4 和 2.3。然而,当 feed 进一步被集中时, avg 严厉地减少了到约 1.0。在持续了 30 天的运作的稳定性测试期间, MEMD 模块的表演仍然保持好。Rongling LIU Yingjie QIN Xiaojun LI Liqiang LIU 2012Frontiers of Chemical Science and Engineering2012,6,3:7
16A hierarchical heterostructure of CdS QDs confined on 3D ZnIn_(2)S_(4) with boosted charge transfer for photocatalytic CO_(2) reduction显示文摘Metal sulfide based materials as photocatalysts for energy conversion are essential to produce value-added chemical fuels,but their intrinsically slow carrier dynamics and low activity are yet to be resolved.Herein,we developed a unique heterogeneously nanostructured ZnIn_(2)S_(4)-CdS heterostructure that involves zero-dimensional(0D)CdS quantum dots uniformly confined on three-dimensional(3D)ZnIn_(2)S_(4)nanoflowers,which achieves an excellent catalytic performance of CO_(2) photoconversion under visible-light irradiation.The obtained hierarchical heterostructure can significantly enhance the light harvesting,shorten the migration distance of carriers,and obviously accelerate the transport of electrons.As evidenced by the ultrafast transient absorption spectroscopy,the formed interface can effectively facilitate charge separation and transport.This work opens up a new avenue to carefully design the elaborate heterostructures for achieving optimal charge separation efficiency by lowering interfacial kinetic barriers and energy losses at the interface.Zezhou Zhu Xiaoxia Li Yunteng Qu Fangyao Zhou Zhiyuan Wang Wenyu Wang Changming Zhao Huijuan Wang Liqiang Li Yagang Yao Qun Zhang Yuen Wu 2021Nano Research2021,14,1:6
17Comparative genomic and transcriptomic analyses uncover the molecular basis of high nitrogen-use efficiency in the wheat cultivar Kenong 9204显示文摘Studying the regulatory mechanisms that drive nitrogen-use efficiency(NUE)in crops is important for sustainable agriculture and environmental protection.In this study,we generated a high-quality genome assembly for the high-NUE wheat cultivar Kenong 9204 and systematically analyzed genes related to nitrogen uptake and metabolism.By comparative analyses,we found that the high-affinity nitrate transporter gene family had expanded in Triticeae.Further studies showed that subsequent functional differentiation endowed the expanded family members with saline inducibility,providing a genetic basis for improving the adaptability of wheat to nitrogen deficiency in various habitats.To explore the genetic and molecular mechanisms of high NUE,we compared genomic and transcriptomic data from the high-NUE cultivar Kenong 9204(KN9204)and the low-NUE cultivar Jing 411 and quantified their nitrogen accumulation under high-and low-nitrogen conditions.Compared with Jing 411,KN9204 absorbed significantly more nitrogen at the reproductive stage after shooting and accumulated it in the shoots and seeds.Transcriptome data analysis revealed that nitrogen deficiency clearly suppressed the expression of genes related to cell division in the young spike of Jing 411,whereas this suppression of gene expression was much lower in KN9204.In addition,KN9204 maintained relatively high expression of NPF genes for a longer time than Jing 411 during seed maturity.Physiological and transcriptome data revealed that KN9204 was more tolerant of nitrogen deficiency than Jing 411,especially at the reproductive stage.The high NUE of KN9204 is an integrated effect controlled at different levels.Taken together,our data provide new insights into the molecular mechanisms of NUE and important gene resources for improving wheat cultivars with a higher NUE trait.Xiaoli Shi Fa Cui Xinyin Han Yilin He Long Zhao Na Zhang Hao Zhang Haidong Zhu Zhexin Liu Bin Ma Shusong Zheng Wei Zhang Jiajia Liu Xiaoli Fan Yaoqi Si Shuiquan Tian Jianqing Niu Huilan Wu Xuemei Liu Zhuo Chen Deyuan Meng Xiaoyan Wang Liqiang Song Lijing Sun Jie Han Hui Zhao Jun Ji Zhiguo Wang Xiaoyu He Ruilin Li Xuebin Chi Chengzhi Liang Beifang Niu Jun Xiao Junming Li Hong-Qing Ling 2022Molecular Plant2022,15,9:6
18Effects of the Fhb1 gene on Fusarium head blight resistance and agronomic traits of winter wheat显示文摘The gene Fhb1 has been used in many countries to improve wheat Fusarium head blight(FHB) resistance. To make better use of this gene in the Yellow-Huai River Valleys Winter Wheat Zone(YHWZ), the most important wheat-producing region of China, it is desirable to elucidate its effects on FHB resistance and agronomic traits in different genetic backgrounds. Based on a diagnostic marker for Fhb1, six BC2 populations were developed by crossing dwarf-male-sterile(DMS)-Zhoumai 16 to three Fhb1 donors(Ningmai 9, Ningmai 13, and Jianyang 84) and backcrossing to Zhoumai 16 and Zhoumai16’s derivative cultivars(Lunxuan 136 and Lunxuan 13) using marker-assisted backcross breeding. The progenies were assessed for FHB resistance and major agronomic traits.The Fhb1 alleles were identified using the gene-specific molecular marker. The plants with the Fhb1-resistant genotype(Fhb1-R) in these populations showed significantly fewer infected spikelets than those with the Fhb1-susceptible genotype(Fhb1-S). When Lunxuan 136 was used as the recurrent parent, Fhb1-R plants showed significantly fewer infected spikelets per spike than Fhb1-R plants produced using Lunxuan 13 as the recurrent parent, indicating that the genetic backgrounds of Fhb1 influence the expression of FHB resistance. Fhb1-R plants from the DMS-Zhoumai 16/Ningmai 9//Zhoumai 16/3/Lunxuan 136 population showed the highest FHB resistance among the six populations and a significantly higher level of FHB resistance than the moderately susceptible control Huaimai 20. No significant phenotypic differences between Fhb1-R and Fhb1-S plants were observed for the eight agronomic traits investigated. These results suggest that it is feasible to improve FHB resistance of winter wheat withoutreducing yield potential by introgressing Fhb1 resistance allele into FHB-susceptible cultivars in the YHWZ.Teng Li Hongjun Zhang Yiwen Huang Zhenqi Su Yun Deng Hongwei Liu Chunyan Mai Guangjun Yu Huili Li Liqiang Yu Tongquan Zhu Li Yang Hongjie Li Yang Zhou 2019The Crop Journal2019,7,6:6
19Analytical study on pretensioned bolt-cable combined support of large cross-section tunnel显示文摘To study the mechanical responses of large cross-section tunnel reinforced by pretensioned rock bolts and anchor cables, an analytical model is proposed. Considering the interaction between rock mass and bolt-cable support, the strain softening characteristic of rock mass, the elastic-plastic characteristic of bolt-cable support, and the delay effect of installation are considered in the model. To solve the different mechanical cases of tunneling reinforced by bolt-cable support, an analytical approach has been put forward to get the solutions of stress and displacement associated with tunneling. The proposed analytical model is verified by numerical simulation. Moreover, parametric analysis is performed to study the effects of pretension force,cross-section area, length, and supporting density of bolt-cable support on tunnel reinforcement, which can provide references for determining these parameters in tunnel design. Based on the analytical model, a new Ground Response Curve(GRC)considering the reinforcement of bolt-cable support is obtained, which shows the pretension forces and the timely installation are important in bolt-cable support. In addition, the proposed model is applied to the analysis of the Great Wall Station Tunnel, a high-speed railway tunnel with a super large cross-section, which shows that the analytical model of bolt-cable support was a useful tool for preliminary design of large cross-section tunnel.LUO JiWei ZHANG DingLi FANG Qian LI Ao SUN ZhenYu CAO LiQiang 2020Science China(Technological Sciences)2020,63,9:6
20Analysis of microscopic pore structures of rocks before and after water absorption显示文摘岩石的吸水的特征被他们的显微镜的毛孔结构影响,它清楚地在水吸收以后变化。水吸收测试和扫描电子显微镜(SEM ) 在岩石上试验样品,在西藏在一个地点定位了,中国,被执行。在水吸收前后的岩石毛孔结构的变化与毛孔尺寸的分发和毛孔的分数维的特征被学习。因为新小毛孔的数字生产了,表面孔,毛孔的分数维的尺寸和毛孔结构的复杂性增加了的结果表演增加了或在岩石吸收了水以后,原来的 macropore 流动隧道被扩展。有他们的水吸收曲线上的变化的点。在另外的岩石的水吸收以后,当原来的毛孔流动隧道变得充满,表面孔和毛孔的分数维的尺寸和毛孔结构的复杂性减少了。水吸收曲线没变化。表面孔和岩石的毛孔分数维图形尺寸在水吸收前后有好线性关系。Li Dejian Wang Guilian Han Liqiang Liu Peiyu He Manchao Yang Guoxing Tai Qimin Chen Cheng 2011Mining Science and Technology2011,21,2:6
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