检索结果-南通市图书馆

Journal of Integrative Plant Biology 2024年第11期66卷 2362-2378页

作者： Pingan hao Chao Jian Chenyang hao Shujuan liu Jian Hou Hongxia liu Haixia liu Xueyong Zhang Huixian Zhao Tian li College of life Sciences Northwest A&F UniversityYangling 712100China State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Wheat culms,comprising four to six internodes,are critically involved in determining plant height and lodging resistance,essential factors for field performance and regional *** study revealed the regulatory function of miR319 in common wheat plant *** of tae-miR319 through short tandem target mimics(STTM) caused an increased plant height,while overexpression(OE) of tae-miR319 had the opposite *** a miR319-resistant target gene TaPCF8(rTaPCF8),increased plant ***8 acted as a transcription repressor of downstream genes TaIAAs,which interact physically with *** significant differences of indole-3-acetic acid(IAA) contents indicate the involvement of auxin pathway in miR319-mediated plant height ***,we identified two TaPCF8 haplotypes in global wheat ***8-5A-Hap2,as per association and evolution examinations,was subjected to strong substantial selection throughout wheat *** haplotype,associated with shorter plant height,aligns with global breeding ***,in high-yield wheat breeding,we proposed a potential molecular marker for marker-assisted selection(MAS).Our findings offer fresh perspectives into the molecular mechanisms that underlie the miR319–TaPCF8 module's regulation of plant height by orchestrating auxin signaling and biosynthesis in wheat.

关键词： auxin plant height tae-miR319 TaIAAs TaPCF8 TaSPL14 Triticum aestivum

Environmental factors controlling soil warming and wetting during 2000-2020 in permafrost and non-permafrost regions across the Qinghai-Tibet Plateau

在线全文

学校读者我要写书评

暂无评论

Advances in Climate Change Research 2024年第2期15卷 285-296页

作者： Guo-An YIN Jing LUO Fu-Jun NIU Ming-hao liU Ze-Yong gao Tian-Chun DONG Wei-Heng NI State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China China Railway Qinghai-Tibet Group Co. Ltd.Xining 810000China University of Chinese Academy of Sciences Beijing 100049China

The Qinghai-Tibet Plateau(QTP)has experienced rapid environmental changes,including climate warming and wetting,since the *** environmental changes significantly impact the shallow soil hydrothermal conditions,which have key roles in land-atmosphere feedback and ecosystem ***,the spatial variations and responses of soil hydrothermal conditions to environmental changes over the QTP with permafrost(PF)and seasonal frost(SF)remain *** this study,we investigated the spatial variations in soil temperature(ST)and soil moisture(SM)changes over the QTP from 2000 to 2020 using 99 in-situ sites with observations at 4 depths(i.e.10,40,100 and 200 cm).The main environmental controlling factors were further identified using a calibrated statistical *** showed that significant(plinear effects over the PF region,whereas changes in EVA,Srad and rainfall highlighted distinct linear and nonlinear effects in the SF *** findings enhance our understanding of the hydrothermal impacts of future environmental changes over the QTP.

关键词： Warming amd wetting Soil hydrothermal change Factor Permafrost Seasonal frost

Geomorphic effect of debris-flow sediments on the Min River,Wenchuan Earthquake region,western China

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

Journal of Mountain Science 2021年第9期18卷 2427-2440页

作者： HU Xu-dong ZHOU li-qin liU Wei-ming WANG hao CUI Lei College of Civil Engineering&Architecture China Three Gorges UniversityYichang 443002China Key Laboratory of Mountain Hazards and Earth Surface Processes Chinese Academy of SciencesChengdu 610041China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China China Renewable Energy Engineering Institute Beijing 100049China

Coseismic landslides and subsequent mobilization of sediment greatly aggravated the landscape evolution and river sedimentation after the Wenchuan *** debris-flow alluvial fan and river morphological index was combined to describe quantitatively the effects of debris-flow sediment on the river characteristics in Longmen *** section of the Min River from the urban area of the Wenchuan county to the epicenter,the Yingxiu town in this county,was selected as the study *** identified 27 river-blocking debrisflows(5 partial-,7 semi-,7 over semi-,and 5 fullyblocking degrees)in the study area via remote sensing interpretation and field *** on this,the response of river longitudinal profile and curvature to debris-flow sediment was qualitatively and quantitatively *** results show that the channel gradient has decreased due to debris-flow aggradation,while two marked peaks in the river steepness index(ksn,represents the relative steepness degree of the channel)changed from 585 m0.9 to 732 m0.9 in zone 1,from 362 m0.9 to 513 m0.9 in zone ***,the main channel has undergone substantial lateral migration with channel width decreased and river curvature *** temporal and spatial variation between river morphological characteristics and debris-flow sediments in short-term provides insights into the internal dynamic role of mass wasting processes in river morphology,which could be served as useful information for natural hazards management to prevent the river from being blocked by episodically debris flows after the earthquake.

关键词： Debris-flow sediment Longitudinal profile River curvature Min River Wenchuan earthquake

Human β-defensin 2 enhances IL-1β production and pyroptosis through P2X7-mediated NLRP3 expression in macrophages

在线全文

学校读者我要写书评

暂无评论

BIOCELL 2022年第5期46卷 1197-1207页

作者： PANPAN WANG GANG li li gao CHUANJIANG Zhao Department of Periodontology Guanghua School and Hospital of StomatologySun Yat-sen UniversityGuangzhouChina Guangdong Provincial Key Laboratory of Stomatology Guanghua School and Hospital of StomatologySun Yat-sen UniversityGuangzhouChina Department of Oral Implantology Delun DentalGuangzhouChina

Periodontal disease is the leading cause of tooth loss,which is also a high-risk factor for other diseases including oral cancer and cardiovascular *** is one of the most common type of periodontal ***-1β(IL-1β)plays a key role in the pathogenesis of ***,the mechanism how IL-1βis produced during periodontitis is still *** the present study,we found that humanβ-defensin 2(hBD2)enhances IL-1βproduction through an LPS-primed human acute monocytic leukemia(THP-1)macrophage *** of P2X purinoceptor 7(P2X7)reduced hBD2-enhanced IL-1β*** of LPS-primed THP-1 macrophages with potassium chloride also suppressed hBD2-enhanced IL-1β*** of inflammasome adaptor Nod-like receptor family pyrin domain containing 3(NLRP3)led to reduced hBD2-enhanced IL-1β***,inhibition of caspase-1 also resulted in the decrease of IL-1β.Moreover,an ethidium bromide uptake test indicated that hBD2-activated caspase-1 mediated pyroptotic pore *** lactate dehydrogenase detection and flow cytometric analysis indicated that hBD2 also induced *** brief,these findings illustrated not only the mechanism of hBD2 in enhancing the inflammatory response,but also provided novel therapeutic targets for periodontitis.

关键词： Periodontitis Humanβ-defensin 2 IL-1β Signal transduction Pyroptosis

An evolving network model with modular growth

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

Chinese Physics B 2012年第2期21卷 603-609页

作者： Zou Zhi-Yun liu Peng Lei li gao Jian-Zhi School of Civil Engineering&Mechanics Huazhong University of Science and TechnologyWuhan 430074China

In this paper, we propose an evolving network model growing fast in units of module, according to the analysis of the evolution characteristics in real complex networks. Each module is a small-world network containing several interconnected nodes and the nodes between the modules are linked by preferential attachment on degree of nodes. We study the modularity measure of the proposed model, which can be adjusted by changing the ratio of the number of inner- module edges and the number of inter-module edges. In view of the mean-field theory, we develop an analytical function of the degree distribution, which is verified by a numerical example and indicates that the degree distribution shows characteristics of the small-world network and the scale-free network distinctly at different segments. The clustering coefficient and the average path length of the network are simulated numerically, indicating that the network shows the small-world property and is affected little by the randomness of the new module.

关键词： evolving modular growth small-world network scale-free network

Determination of Pesticide Residue Cartap Using a Sensitive Fluorescent Probe

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2012年第11期11卷 1861-1870页

作者： JING Xu DU li-ming WU hao WU Wen-ying CHANG Yin-xia Analytical and Testing Center Shanxi Normal University Linfen 041000 P.R.China

The insecticide cartap （CP） is non-fluorescent in aqueous solutions. This property makes its determination through direct fluorescent method difficult. In acidic medium and at room temperature, palmatine （PAL） can react with cucurbit[7]uril （CB[7]） to form stable complexes, and the fluorescence intensity of the complex is greatly enhanced. Significant quenching of the fluorescence intensity of the CB[7]-PAL complex was observed with the addition of cartap. Based on the significant quenching of the supramolecular complex fluorescence intensity, a new spectrofluorimetric method with high sensitivity and selectivity was developed to determine cartap in aqueous solution. The fluorescence quenching values （AF） showed good linear relationship with cartap concentrations from 0.009 to 2.4 ~tg mL-~ with a detection limit 0.0029 ~tg mE-x. The proposed method had been successfully applied to the determination of cartap residues in grain and vegetable with recoveries of 87.4-103%. In addition, the association constants of the complexes formed between the host and the guest were determined. The competing reaction and the supramolecular interaction mechanisms between the cartap and PAL as they fight for occupancy of the CB[7] cavity were studied using spectrofluorimetry, xH NMR and molecular modeling calculations.

关键词： cartap cucurbituril palmatine fluorescent probe

Shape Sensing of Thin Shell Structure Based on Inverse Finite Element Method

在线全文

学校读者我要写书评

暂无评论

Structural Durability & Health Monitoring 2022年第1期16卷 1-14页

作者： Zhanjun Wu Tengteng li Jiachen Zhang Yifan Wu Jianle li Lei Yang hao Xu State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian116024China Division of Science and Technology Beijing Normal University-Hong Kong Baptist University United International CollegeZhuhai519000China Country School of Marxism Northeastern UniversityShenyang110167China

Shape sensing as a crucial component of structural health monitoring plays a vital role in real-time actuation and control of smart structures,and monitoring of structural *** a model-based method,the inverse finite element method(iFEM)has been proved to be a valuable shape sensing tool that is suitable for complex *** this paper,we propose a novel approach for the shape sensing of thin shell structures with *** the structural form and stress characteristics of thin-walled structure,the error function consists of membrane and bending section strains only which is consistent with the Kirchhoff–Love shell *** numerical implementation,a new four-node quadrilateral inverse-shell element,iDKQ4,is developed by utilizing the kinematics of the classical shell *** new element includes hierarchical drilling rotation degrees-of-freedom(DOF)which enhance applicability to complex ***,the reconstruction performance is examined numerically using a cantilever plate *** the validation cases,the applicability of the iDKQ4 element to more complex structures is demonstrated by the analysis of a thin ***,the deformation of a typical aerospace thin-wall structure(the composite tank)is reconstructed with sparse strain data with the help of iDKQ4 element.

关键词： Structural health monitoring inverse finite method Kirchhoff–Love shell theory composite tank shape sensing

Lowered water table causes species substitution while nitrogen amendment causes species loss in alpine wetland microbial communities

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

Pedosphere 2021年第6期31卷 912-922页

作者： Yuntao li Jin-Sheng HE hao WANG Jizhong ZHOU Yunfeng YANG Haiyan CHU State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of Sciences71 East Beijing RoadNanjing 210008(China) University of Chinese Academy of Sciences Beijing 100049(China) Department of Ecology College of Urban and Environmental SciencesPeking UniversityBeijing 100871(China) State Key Laboratory of Grassland Agro-Ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730000(China) State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084(China) Institute for Environmental Genomics Department of Microbiology and Plant Biology and School of Civil Engineering and Environmental SciencesUniversity of OklahomaNorman OK 73019(USA) Earth Science Division Lawrence Berkeley National LaboratoryBerkeley CA 94270(USA)

Alpine wetlands are hotspots of carbon(C)storage and methane emission,and they could be key contributors to global *** recent years,rapid warming has lowered the water table in alpine wetlands on the Tibetan Plateau,concurrent with intensified nitrogen(N)deposition via anthropogenic *** carried out a field experiment to investigate the ecological impacts of these two factors on soil bacterial and functional communities,which are essential drivers of greenhouse gas *** amendment alone decreased the phylogenetic alpha-diversity of bacterial communities which could be offset by lowered water *** contrast,microbial functional alpha-diversity,revealed by a high-throughput microarray,remained *** bacterial and functional beta-diversity responded to lowered water table,but only bacterial community responded to N *** alpha-Proteobacteria,beta-Proteobacteria,and Bacteroidetes were the major responsive bacterial lineages,and C degradation,methanogenesis,alkaline shock,and phosphorus oxidation were the major responsive functional *** analysis revealed that N amendment changed bacterial community structure mainly via species loss processes but did not affect bacterial functional communities,with soil pH and ammonium as the key factors influencing changes in bacterial community ***,lowered water table altered bacterial and functional communities through species substitution processes linked to soil pH and soil *** to our results,the response mechanisms of microbial communities to lowered water table and N amendment are fundamentally different in alpine wetlands.

关键词： alpha-diversity bacterial community beta-diversity microbial functional community N amendment water table lowering

Synthesis of easily-processable collagen bio-inks using ionic liquid for 3D bioprinted liver tissue models with branched vascular networks

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第5期66卷 1489-1499页

作者： Zhiqiang gao Xin liu hao Zhao Shengpeng Xia Wenli liu haotian Bai Fengting Lv Xiongfei Zheng Yiming Huang Qi Gu Shu Wang Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Beijing Institute for Stem Cell and Regenerative Medicine Beijing 100101China College of Chemistry University of Chinese Academy of SciencesBeijing 100049China Shenyang Institute of Automation Chinese Academy of SciencesShenyang 110169China

Bioprinting has been a flouring way to fabricate complex tissue and organ mimics via precisely depositing printable cell-laden ***,there is a limited number of biomaterials that fulfill the mechanical property of printing while meeting the responsive environment desired for the *** excellent cell compatibility and bioactivity,collagen suffers from difficulties in processing and printability which inhibited its utilization in three-dimensional(3D)***,we address this limitation by using ionic liquid as the solvent in the modification process,enabling collagens modified with quantified norbornene for chemical crosslink and extrusion-based 3D *** improved solubility and rheological properties,norbornene-functionalized collagen(Col-Nor)exhibited better shape fidelity in extrusion-based 3D printing compared with the one before ***-crosslinked Col-Nor hydrogel provided structural support and promoted the adhesion,proliferation,and differentiation of various types of cells,which afforded a centimeter-scale liver tissue *** highly generalizable methodology expands printable,versatile,and tunable hydrogels developed from the natural extracellular matrix,allowing the biofabrication of 3D liver tissue model with branched vascular networks.

关键词： bioprinting functionalized collagen rheological properties photo-crosslinking 3D tissue model

Aerosol-assisted submicronγ-Fe2O3/C spheres as a promising heterogeneous Fenton-like catalyst for soil and groundwater remediation:Transport,adsorption and catalytic ability

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第3期31卷 715-720页

作者： Jingjing Zhan Mingfei li Xiujuan Zhang Yu An Weiqi Sun Aixia Peng hao Zhou School of Food and Environment Dalian University of TechnologyPanjin 124221China School of Petroleum and Chemical Engineering Dalian University of TechnologyPanjin 124221China

This research reports a novel heterogeneous Fenton-like catalyst which could freely move through the model sediments and easily seize the pollutants in addition to efficiently catalyze H2O2,well suitable for soil and groundwater ***,submicron y-Fe2O3/C spheres were synthesized through a facile one-step aerosol-based *** a series of column tests,these spheres exhibit better transport ability due to their optimal size,conforming to the prediction by the Tufenkji-Elimelech filtration theo ***,y-Fe2O3/C spheres could act as a strong adsorbent for organic pollutants owing to the presence of carbon,thereby providing a driving force to gather contaminants into their vicinity and facilitating the *** addition,immobilization of y-Fe2O3 nanoparticles into carbon spheres protects iron oxides from aggregation,and thus retains the number of active sites for catalytic decomposition of ***,the system containing the as-prepared y-Fe2O3/C spheres and H2O2 shows the high removal efficiency and degradation efficiency in the remediation of recalcitrant organic contaminants such as methylene blue and sulfamethoxazole.

关键词： Heterogeneous Fenton Groundwater remediation Aerosol-assisted materials Transport Adsorption