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Larix olgensis growth-climate response between lower and upper elevation limits:an intensive study along the eastern slope of the changbai Mountains,northeastern China

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Journal of Forestry Research 2020年第1期31卷 231-244页

作者： jian yu Qijing Liu Forestry College Beijing Forestry University

Larix olgensis is a dominant tree species in the forest ecosystems of the changbai Mountains of northeast *** assess the growth response of this species to global climate change,we developed three tree-ring width and biomass chronologies across a range of elevations in the subalpine forests on the eastern slope of the changbai *** used dendroclimatic analyses to study key factors limiting radial growth in *** and its variation with *** statistical characteristics of chronologies suggested that elevation is a determinant of tree growth patterns in the study *** function analysis of chronologies with climate factors indicated that climate–growth relationships changed with increasing elevation:tree growth at high elevation was strongly limited by June temperatures of the previous year,and as elevation decreases,the importance of temperature decreased;tree radial growth at mid-elevation was mainly controlled by precipitation towards the end of the growing season of the current *** chronologies reflected a stronger climatic signal than tree-ring width *** correlation with gridded climate data revealed that our chronologies contained a strong regional temperature signal for northeast *** growing below timberline appeared to be more sensitive to climate,thus optimal sites for examining growth trends as a function of climate variation are considered to be just below *** study objective was to provide information for more accurate prediction of the growth response of *** to future climate change on the eastern slope of the changbai Mountains,and to provide information for future climate reconstructions using this tree species in humid and semi humid regions.

关键词： Tree-ring width Dendrochronology changbai Mountains Elevation gradient Timberline Larix olgensis

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Activity of Azoxystrobin and SHAM to Four Phytopathogens

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Agricultural Sciences in China 2009年第7期8卷 835-842页

作者： JIN Li-hua CHEN yu CHEN chang-jun WANG jian-xin ZHOU Ming-guo College of Plant Pathology Nanjing Agricultural University Nanjing 210095 P.R.China

The study was conducted to make clear the activity of azoxystrobin to 4 plant pathogens and the synergistic effects of salicylhydroxamic acid （SHAM）, which acted on the alternative oxidase. It was also conducted to be aware of the mechanism of azoxystrobin in inhibition on mycelial respiration and the influence of SHAM. The activity test of azoxystrobin and SHAM was carried out with a mycelial linear growth test and spore germination test. Other related biological properties were also observed. Inhibition of azoxystrobin and SHAM on 4 pathogens was determined by using SP-II oxygraph system. Azoxystrobin inhibited mycelial growth in Colletotrichum capsici, Botrytis cinerea, Rhizoctonia solani, and Magnaporthe grisea, respectively; it also inhibited conidia germination, and conidia production in C. capsici, B. cinerea M. grisea, and sclerotia formation in R. solani. Moreover, it created stayed pigment biosynthesis in C. capsici and M. grisea somehow. Salicylhydroxamic acid enhanced inhibition by azoxystrobin. An oxygen consuming test of the mycelia showed that azoxystrobin inhibited all the 4 fungi＇s respiration in the early stages. With the concentration rising up, the effectiveness increased. However, as time went on, the respiration of the mycelia treated with fungicides recovered and SHAM could not inhibit the oxygen consuming. This reaction between the mycelia and the fungicides appeared not to initiate alternative respiration but rather the other mechanism created a lack of efficacy.

关键词： azoxstrobin salicylhydroxamic acid (SHAM) plant pathogens spore germination mycelial growth oxygenconsumption rate

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Sn nanoparticles embedded into porous hydrogel-derived pyrolytic carbon as composite anode materials for lithium-ion batteries

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Rare Metals 2022年第10期41卷 3421-3431页

作者： Guan-Li Xu yu-Dong Gong chang Miao Qing Wang Shu-Qing Nie yu Xin Min-yue Wen jian Liu Wei Xiao College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou434023China Hebei Key Laboratory of Dielectric and Electrolyte Functional Material Northeastern University at QinhuangdaoQinhuangdao066004China Peking University Science Park Beijing100871China School of Engineering Faculty of Applied ScienceThe University of British ColumbiaKelownaBCV1V 1V7Canada

The composite powders,Sn nanoparticles embedded into the porous hydrogel-derived carbon(Sn@PHDC),were successfully prepared by polymerization and calcination processes,and the characterization results confirmed that Sn nanoparticles were homogeneously dispersed in the porous hydrogel-derived pyrolytic *** coin cell assembled with the Sn@PHDC-50 composite electrode presented good cyclic stability and rate performance when the weight ratio of Sn nanoparticles to hydrogel-derived pyrolytic carbon was maintained at 1:***,the Sn@PHDC-50 electrode manifested a lower charge transfer resistance of 58.57 Ω and a higher lithium ions diffusion coefficient of 1.117×10^(-14) cm^(2)·s^(-1) than pure Sn and other Sn@PHDC *** improvements can be partly ascribed to the fact that the hydrogelderived pyrolytic c arbon matrix can release the volume strain and enhance the electronic conductivity of the composite electrode,and partly to the fact that the porous hydrogelderived pyrolytic carbon matrix can suppress agglomerations of Sn nanoparticles and shorten Li^(+) diffusion *** work may provide a new appro ach for the improvement of Sn-based anode materials for lithium-ion batteries.

关键词： Sn nanoparticles Hydrogel Composite anode Electrochemical performance Lithium-ion battery

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Transcriptome analysis in the beet webworm, Spoladea recurvalis （Lepidoptera： Crambidae）

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Insect Science 2018年第1期25卷 33-44页

作者： jian-Cheng chang Srinivasan Ramasamy A VRDC - The World Vegetable Center Shanhua Tainan Taiwan China

The beet webworm, Spoladea recurvalis Fabricius, is a destructive pest on vegetable crops in tropics and subtropics; its main host plant is amaranth. It has become imperative to develop non-chemical methods to control S. recurvalis on amaranth. However, the lack of molecular information about this species has hindered the development of novel pest management strategies. In this study, high-throughput RNA sequencing covering de novo sequence assemblies, functional annotation of transcripts, gene function classification and enrichment was performed on S. recurvalis. Illumina sequencing generated a total of 120 435 transcript contigs ranging from 201 to 22 729 bases with a mean length of 688 bases. The assembled transcripts were subjected to Basic Local Alignment Search Tool- X （BLASTX） to obtain the annotations against non-redundant, Swiss-Prot, Clusters of Orthologous Groups （COG） and Kyoto Encyclopedia of Genes and Genomes （KEGG） protein databases. A subset of 58 225 transcript sequences returned hits from known proteins in the National Center for Biotechnology Information database, and the majority of the transcript sequences had the highest number of hits for Danausplexippus （50.43%）. A total of 1217 Gene Ontology-level 3 annotations were assigned to 51 805 transcripts, while 39 650 transcripts were predicted as functional protein-coding genes in the COG database and 20 037 transcripts were enriched to KEGG pathways. We identified 40 putative genes related to pheromone production and reception in S. recurvalis, with the expression of one gene between 0.29 and 1141.79 fragments per kilo base per million （FPKM） reads. The transcriptome sequence of S. recurvalis is a first step toward offering a comprehensive genomic resource which would enable better understanding of molecular mechanisms to enable development of effective pest management practices for this species.

关键词： pheromone protein-coding genes putative genes Spoladea recurvalis transcriptome

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Possible Mechanism Associated with Herbicidal Activity of Soybean Meal Hydrolysate (SMH)

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Agricultural Sciences in China 2010年第6期9卷 854-860页

作者： YANG jian LU chang-yi School of Applied Chemistry and Biotechnology Shenzhen Polytechnic Shenzhen 518055 P.R.China Environmental Science Research Center Xiamen University Xiamen 361005 P.R. China

Soybean meal hydrolyzate （SMH） has been proposed for use as a natural preemergence ***,the mechanism by which SMH exerts its herbicidal activity remains *** this paper,the herbicidal activities of SMH against perennial ryegrass （Lolium perenne L.） under non-sterile and sterile conditions were evaluated and the relationship between the molecular weight of the ultrafiltration （UF） fractions of SMH and their herbicidal activities were ***,the ammonia content changes of the media of SMH treatments 7 d after incubation were also *** results showed that SMH inhibited the radicle growth of germinating *** seeds in a dose-dependent manner under non-sterile ***,SMH in the concentrations investigated increased the radicle length and shoot length by 14-17% and 11-15% respectively under sterile *** ammonia contents in the SMH media at all treatments increased greatly from less than 0.01 mg L-1 to up to 11.86-41.37 mg L-1 after 7 d incubation under non-sterile ***,ammonia content did not change under sterile condition,proposing that the herbicidal activity might be caused by the free ammonia released from SMH by microbial *** was no difference on the perennial ryegrass radicle inhibition among the UF fractions of SMH on an equivalent N *** could be concluded that SMH exerted its herbicidal activity through the free ammonia released under non-sterile condition instead of by specific peptide（s） in SMH.

关键词： soybean meal hydrolysate herbicidal active mechanism ammonia

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A new liquid membrane diffusion model for characterizing the adsorption kinetics of europium by using a continuous measurement of adsorption platform

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Nuclear Science and Techniques 2024年第1期35卷 59-72页

作者： Hao-Qi yu Tao yu jian-Hua Ye State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China CGN Cangnan Nuclear Power Co. Ltd.Cangnan 325800China jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

To explore the kinetic adsorption under continuous and nonequilibrium states, an integration of continuous measurement and adsorption platform kinetics method was proposed, which was initially called the ICM-AP kinetics method, and a corresponding kinetic adsorption experimental method was developed. Adsorption experiments of europium(Eu) on Ca-bentonite,Na-bentonite, and the D231 cation exchange resin were performed using the ICM-AP kinetics method and continuous measurements. Because the kinetic experimental results observed in this study were different from those of traditional batch adsorption data, pseudo-first-order or pseudo-second-order kinetic models were unsuitable for fitting the experimental ***, a liquid membrane diffusion(LMD) model was developed based on the assumption of simultaneous adsorption/desorption to discuss the mechanism of kinetic adsorption. The kinetic adsorption mechanism was also studied by using *** results indicated that the proposed adsorption model can fit the experimental data more suitably, and the adsorption/desorption behaviors of Eu on bentonite and the D231 resin were simultaneously observed, suggesting that the adsorption kinetics of Eu(Ⅲ) was mainly dominated by hydrated Eu(Ⅲ) ions on the liquid membrane.

关键词： ICM-AP method LMD model Adsorption mechanism Eu(Ⅲ)

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Root Morphology and Physiology in Relation to the Yield Formation of Rice

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Journal of Integrative Agriculture 2012年第6期11卷 920-926页

作者： YANG jian-chang ZHANG Hao ZHANG jian-hua Key Laboratory of Crop Genetics and Physiology of jiangsu Province/Agricultural College Yangzhou University Yangzhou 225009 PR. China School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Hong Kong P.R.China

Root system is a vital part of plant and regulates many aspects of shoot growth and development. This paper reviews how some traits of root morphology and physiology are related to the formation of grain yield in rice （Oryza sativa L.）. Higher root biomass, root oxidation activity, and cytokinin contents in roots are required for achieving more panicle number, more spikelets per panicle, greater grain-filling percentage, and higher grain yield. However, these root traits are not linearly correlated with yield components. When these traits reach very high levels, grain filling and grain yield are not necessarily enhanced. High numbers of mitochondria, Golgi bodies, and amyloplasts in root tip cells benefit root and shoot growth and yield formation. Proper crop management, such as an alternate wetting and moderate soil drying irrigation, can significantly improve ultra-structure of root tip cells, increase root length density and concentration of cytokinins in root bleedings, and consequently, increase grain-filling percentage, grain yield, and water use efficiency. Further studies are needed to investigate the mechanism underlying root-shoot and root-soil interactions for high grain yield, the roles of root-sourced hormones in regulating crop growth and development and the effects of soil moisture and nutrient management on the root architecture and physiology.

关键词： rice (Oryza sativa) root morphology and physiology grain yield grain filling alternate wetting and moderatedrying

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Regularity of the Inverse of a Homeomorphism with Finite Inner Distortion

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Acta Mathematica Sinica,English Series 2014年第12期30卷 1999-2013页

作者： chang yu GUO Department of Mathematics and Statistics University of JyvskylP.O.Box 35FI-40014JyvskylFinland

Let f ： Ω→ f（Ω） belong to R^n be a W^1,1-homeomorphism with L^1-inegrable inner We show that finiteness of min{lipf（x）, kf（x））, for every x∈ Ω／E, implies that f^-1 ∈ W^1,n and has finite distortion, provided that the exceptional set E has σ-finite H^***, f has finite distortion, differentiable a.e. and the Jacobian Jf 〉 0 a.e.

关键词： Mapping of finite distortion mappings of finite inner distortion bi-Sobolev homeomorphism Condition N on a.e. sphere modulus of rectifiable surfaces

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Fractional Sobolev-Poincar Inequalities in Irregular Domains

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Chinese Annals of Mathematics,Series B 2017年第3期38卷 839-856页

作者： chang-yu GUO Department of Mathematics and Statistics University of Jyvaskyla P.O. Box 35 FI-40014 JyvaskylaFinland Department of Mathematics University of Fribourg Chemin du Musee 23 CH-1700 FribourgSwitzerland.

This paper is devoted to the study of fractional(q, p)-Sobolev-Poincar′e inequalities in irregular domains. In particular, the author establishes(essentially) sharp fractional(q, p)-Sobolev-Poincar′e inequalities in s-John domains and in domains satisfying the quasihyperbolic boundary conditions. When the order of the fractional derivative tends to 1, our results tend to the results for the usual derivatives. Furthermore, the author verifies that those domains which support the fractional(q, p)-Sobolev-Poincar′e inequalities together with a separation property are s-diam John domains for certain s, depending only on the associated data. An inaccurate statement in [Buckley, S. and Koskela, P.,Sobolev-Poincar′e implies John, Math. Res. Lett., 2(5), 1995, 577–593] is also pointed out.

关键词： Fractional Sobolev-Poincar inequality s-John domain Quasihyperbolic boundary condition

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On the Center Problem for Generalized Abel Equations

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Acta Mathematica Sinica,English Series 2023年第12期39卷 2329-2337页

作者： chang jian LIU Shao Qing WANG School of Mathematics(Zhuhai) Sun Yat-sen UniversityZhuhai 519082P.R.China

This paper is devoted to the conditions of the existence of CC-center for the generalized Abel *** some new original methods,we obtain extended results of the main theorems in the paper by Llibre and Valls(2020)and th... 详细信息

关键词： Generalized Abel equation composition condition center problem

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