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TaARR1, a cytokinin response regulator gene in Triticum aestivum, is essential in plant n starvation tolerance via regulating the n acquisition and n assimilation

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Journal of Integrative Agriculture 2019年第12期18卷 2691-2702页

作者： yang Meng-ya CHEn Jia-qi TIAn He-yang nI Chen-yang XIAO Kai College of Agronomy Hebei Agricultural University/Key Laboratory of Crop Growth Regulation of Hebei Province

Plant n starvation response is closely associated with the n signaling components that involve transduction of the low-n cues. In this study, we functionally characterized Ta ARR1, a cytokinin(CK) response regulator gene in Triticum aestivum, in mediating the n starvation adaptation in plants. Ta ARR1 harbors two conserved domains specified by plant ARR family members;subcellular localization analysis indicated its target onto nucleus after endoplasmic reticulum assortment. Ta ARR1 displayed modified expression upon the n starvation stressor, showing upregulated expression in roots and leaves over a 27-h n starvation treatment and whose induced transcripts were gradually recovered along with progression of the n recovery treatment. The tobacco lines overexpressing Ta ARR1 displayed improved low-n stress tolerance, displaying enlarged phenotype, increased biomass and n accumulation, and enhanced glutamine synthetase(GS) activities compared with wild type(WT) following the n starvation treatment. Expression analysis on genes encoding the nitrate transporter(nRT) and GS proteins in nicotiana tabacum revealed that nt nRT2.2 and nt GS3 are upregulated in expression in the n-deprived transgenic lines, whose expression patterns were contrasted to other above family genes that were unaltered on transcripts between the transgenic lines and WT. Transgene analysis validated the function of nt nRT2.2 and nt GS3 in regulating n accumulation, GS activity, growth traits, and n use efficiency in plants. These results suggested the internal connection between the Ta ARR1-mediated n starvation tolerance and the modified transcription of distinct n acquisitionand assimilation-associated genes. Our investigation together indicates that Ta ARR1 is essential in plant n starvation adaptation due to the gene function in transcriptionally regulating distinct nRT and GS genes that affect plant n uptake and assimilation under the n starvation condition.

关键词： wheat(Triticum aestivum L.) cytokinin response regulator gene expression n starvation functional characterization

Different patterns of molecular,carbon and hydrogen isotope compositions of n-alkanes between heterotrophic plant and its hosts

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Frontiers of Earth Science 2020年第4期14卷 783-788页

作者： Xin yang Xianyu Huang State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan430078China Hubei Key Laboratory of Critical Zone Evolution School of Geography and Information EngineeringChina University of GeosciencesWuhan430078China

This study investigates the molecular,carbon,and hydrogen isotope compositions of n-alkanes in eight pairs of a holoparasitic plant(Cuscuta chinensis)and its *** is unexpected that *** has a higher concentration of n-alkanes than its hosts in seven of the eight pairs,and it is preferentially dominated by n-C_(29) alkane(representing>75%of the total n-alkanes).In addition,theδ^(13)C values of C_(29) alkane in *** are less negative(avg.1.8‰)than those in the hosts,while theδ^(2)H values of C_(29) alkane are more negative in ***(the difference averages 48‰).We propose that the ^(2)H-depletion of n-alkanes in the stem parasite *** may result from the utilization of stem water with less influence from evapotranspiration or the use of newly synthesized carbohydrates which is ^(2)H-depleted relative to stored *** results highlight the importance of plant nutrient status on the molecular and isotopic compositions of leaf waxes,which shed light on the(paleo)ecological potential of leaf waxδ^(2)H values.

关键词： heterotrophic plant Cuscuta n-alkane carbon isotope hydrogen isotope

A generalized CAP-subgroup of a finite group

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Science China Mathematics 2015年第10期58卷 2133-2144页

作者： GUO WenBin SKIBA Alexander n. yang nanYing School of Mathematical Sciences University of Science and Technology of China Department of Mathematics Francisk Skorina Gomel State University School of Science Jiangnan University

Let A be a subgroup of a finite group G. We say that A is a generalized CAP-subgroup of G if for each chief factor H/K of G either A avoids H/K or the following holds:(1) If H/K is non-abelian, then|H :(A ∩H)K | is a p′-number for every p ∈π((A ∩H)K/K);(2) If H/K is a p-group, then |G : nG(K(A ∩H))| is a p-number. In this paper, we use the generalized CAP-subgroup to characterize the structure of finite *** new characterizations of the hypercyclically embedded subgroups of a finite group are obtained and a series of known results are generalized.

关键词： finite group generalized CAP-subgroup U-embedded subgroup solubly saturated formation p-nilpotent group supersoluble subgroup

Modified Model of Crack Tip Stress Field Considering Dislocation Slip Accumulation and Crack Tip Blunting

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Chinese Journal of Mechanical Engineering 2023年第2期36卷 327-340页

作者： Jian Li Bing yang Shuancheng Wang M.n.James Shoune Xiao Tao Zhu Guangwu yang State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China School of Engineering Computing&MathematicsUniversity of PlymouthPlymouth PL48AAEngland Department of Mechanical Engineering Nelson Mandela UniversityPort Elizabeth 6001South Africa

This study uses the digital image correlation technique to measure the crack tip displacement field at various crack lengths in U71MnG rail steel,and the interpolated continuous displacement field was obtained by fitting with a back propagation(BP)neural *** slip and stacking of dislocations affect crack initiation and growth,leading to changes in the crack tip field and the fatigue characteristics of crack *** Christopher-James-Patterson(CJP)model describes the elastic stress field around a growing fatigue crack that experiences plasticity-induced *** the present work,this model is modified by including the effect of the dislocation field on the plastic zone of the crack tip and hence on the elastic field by introducing a plastic flow factorρ,which represents the amount of blunting of the crack *** Levenberg-Marquardt(L-M)nonlinear least squares method was used to solve for the stress intensity *** verify the accuracy of this modified CJP model,the theoretical and experimental plastic zone errors before and after modification were compared,and the variation trends of the stress intensity factors and the plastic flow factorρwere *** results show that the CJP model,with the introduction ofρ,exhibits a good blunting *** the low plasticity state,the modified model can accurately describe the experimental plastic zone,and the modified stress intensity factors are more accurate,which proves the effectiveness of dislocation *** plastic flow correction provides a more accurate crack tip field model and improves the CJP crack growth relationship.

关键词： Digital image correlation Back propagation neural network Plastic zone CJP model Dislocation field

A first-principles study on electronic structures and elastic properties of metal dopedα-Fe(n)high nitrogen steel

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Journal of Iron and Steel Research International 2017年第1期24卷 103-110页

作者： Ji-chun yang Xiang-jun Liu Gui-xiao Jia Xiao-yang Fu School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou 014010Inner MongoliaChina

The binding energies,electronic structures and elastic properties of Ti,V,Cr,Mn,Co,ni and Mg dopedα-Fe（n）systems have been investigated using a first-principles *** calculated results show that the dopings of Ti,V,Cr and Co improve the stability ofα-Fe（n）,and the stability ofα-Fe（n）is slightly weakened by Mn and ni,and the doping of Mg is *** Ti,V,Cr and Mn dopedα-Fe（n）systems in which the doping metals are on the left side of Fe in the element periodic table andα-Fe（n）systems doped by Co and ni on the right side of Fe,their corresponding cohesive forces decrease with decreasing atomic radius of the doping *** obvious interaction exists among M3 d,Fe4s3p3d and n2 *** these doping systems,metal atoms lose electrons,while n gains *** of Ti,V,Cr and Mn inα-Fe（n）strengthen the interaction between n and the surrounding metals,and it is not apparent for the dopings of Co,ni and *** calculations of Fe15 Mn systems show that,except for the Fe15 Mgn system,shear modulus G and Young modulus E of Fe15 Mn systems are improved,and the bulk modulus Bslightly decreases,namely,total elastic properties are *** magnitude change rule of E reflecting the cohesive force between atoms is consistent with that for the binding energies.

关键词： First principle High nitrogen steel Metal nitride Electronic structure Elastic property

Schiff-base-rich g-C_(x)n_(4) supported PdAg nanowires as an efficient Mott-Schottky catalyst boosting photocatalytic dehydrogenation of formic acid

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Rare Metals 2021年第4期40卷 808-816页

作者： Hu Liu Xue-Xiang Li Xin-yang Liu Zhen-Hui Ma Zhou-yang Yin Wei-Wei yang Yong-Sheng Yu School of Chemistry and Chemical Engineering Xi’an University of Architecture and TechnologyXi'an 710055China School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi'an 710072China MIIT Key Laboratory of Critical Materials Technology for new Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Department of Chemistry Brown UniversityRI 02912USA

Developing an efficient photocatalyst,catalyzing formic acid(FA) dehydrogenation,can satisfy the demand of the H_(2) ***,a graphitic carbon nitride(gC_(x)n_(4))-based nanosheet(x=3.2,3.6 or 3.8) with melem rings conjugated by Schiff-base bond(n=C-C=n) was synthesized,tuning the bandgaps(Eg) of graphitic carbon nitride(g-C_(3) n_(4)) in the range of 1.8 400 nm) without any additive at 25℃,which is the best value among ever-reported *** work provides a new strategy to boost dehydrogenation photocatalysis of FA,which will be promising for practical application of H2 in future energy field.

关键词： Dehydrogenation of formic acid Graphitic carbon nitride Schiff base PdAg nanowires Mott-Schottky heterojunction

Facile access to C-n bonds via unexpected side reactions of Knoevenagel condensation and their application in high-efficiency organic solar cells

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Science China Chemistry 2024年第1期67卷 323-329页

作者： Daobin yang Shuncheng yang Hongqian Wang Lin Xie Pengyu Yan Ziyi Ge Zhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The construction of C-n bonds is of great importance in the fields of biology,medicine,chemistry and materials ***,the replacement of organic base from pyridine to piperidine in the Knoevenagel condensation process unexpectedly yields a series of novel organic molecules containing C-n ***,the synthesis method does not require any external transition-metals catalysis,and photo-/***,when the new compound 1b is added as a third component to a well-known binary system of PM6:Y6,the efficiency of the organic solar cell is significantly improved,resulting in an outstanding efficiency of 18.0%,which is one of the highest values reported to date for PM6:Y6-based ternary organic solar cells.

关键词： C-n bonds Knoevenagel condensation cross-coupling reaction third component organic solar cells

Factorizations of Fitting classes

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Frontiers of Mathematics in China 2012年第5期7卷 943-954页

作者： nanying yang Wenbin GUO n.T. VOROB'EV School of Mathematics University of Science and Technology of China Hefei 230026 China Department of Mathematics Vitebsk State University Vitebsk 210038 Belarus

In this paper, we prove that there exists a infinite set of non-trivial local Fitting classes every element in which is decomposable as a non-trivial product of Fitting classes such that every factor in the product is neither local nor a formation. In particular, this gives a positive answer to Problem 11.25 a） in The Kourovka notebook.

关键词： Fitting class normal Fitting class semilocal Fitting class Lockett class

Self-sacrificial template synthesis of Fe, n co-doped porous carbon as efficient oxygen reduction electrocatalysts towards Zn-air battery application

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Chinese Chemical Letters 2022年第4期33卷 2171-2177页

作者： Tianfang yang Ye Chen yang Liu Xupo Liu Shuyan Gao School of Materials Science and Engineering Henan Normal UniversityXinxiang 453007China

Designing highly efficient non-precious based electrocatalysts for oxygen reduction reaction(ORR) is of significance for the rapid development of metal-air ***,a hydrothermal-pyrolysis method is employed to fabricate Fe,n co-doped porous carbon materials as effective ORR electrocatalyst through adopting graphitic carbon nitride(g-C_(3)n_(4)) as both the self-sacrificial templates and n *** gC_(3)n_(4)provides a high concentration of unsaturated pyridine-type n to coordinate with iron to form Fe-n active *** adjusting the Fe doping amounts,it is proved that appropriate Fe doping content is conducive to the construction of abundant defects and active sites of *** as-prepared catalyst exhibits superior electrocatalytic ORR performance in alkaline media with half-wave potential(E_(1/2)=0.82 V) and onset potential(E_(onset)=0.95 V),equivalent to the commercial Pt/C ***,there is almost no activity loss after 10 k continuous cyclic voltammetry cycles and methanol tolerance,indicating the excellent durability and superior methanol ***,when assembled as the cathode in a Zn-air battery,the device displays a power density of 99 mW/cm^(2),an open-circuit potential of 1.48 V and long-term discharge-charge cycling stability,indicating the promising potential to substitute the Pt catalyst for practical application.

关键词： Electrocatalyst Oxygen reduction reaction Fe n co-doped porous carbon Fe-n active sites Zn-air batteries