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Boosting Seed Development as a New Strategy to Increase Cotton Fiber Yield and Quality

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Journal of Integrative Plant Biology 2013年第7期55卷 572-575页

作者： yong-ling Ruan Department of Biology School of Environmental and Life SciencesThe University of Newcastle Australia Australia-China Research Centre for Crop ImprovementThe University of Newcastle

Cotton （Gossypium spp.） is the most important textile crop worldwide due to its cellulosic mature fibers, which are single-celled hairs initiated from the cotton ovule epidermis at anthesis. Research to improve cotton fiber yield and quality in recent years has been largely focused on identifying genes regulating fiber cell initiation, elonga- tion and cellulose synthesis. However, manipulating some of those candidate genes has yielded no effect or only a marginally positive effect on fiber yield or quality. On the other hand, evolutionary comparison and transgenic studies have clearly shown that cotton fiber growth is intimately controlled by seed development. Therefore,I propose that enhancing seed development could be a more effective and achievable strategy to increase fiber yield and quality.

关键词： Auxin cotton fiber seed development sugars seed maternal and filial tissues.

The designing strategies of graphene-based peroxidase mimetic materials

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Science China Chemistry 2018年第3期61卷 266-275页

作者： Yanjie Wen Linyin Yan yong-Chien ling Taiwan Tsing Hua University Hsinchu 30013 Taiwan China Beijing National Laboratory for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Natural enzymes have been praised highly as ideal catalysts, presumably owing to their remarkable advantages of high efficiency,high selectivity, and mild reaction conditions. The reports of chemical simulation and systematic synthesis of natural enzymes such as peroxidase(POD) are rare because of their complex biological structures. POD represents a large family of oxidoreductases and offers a wide range of applications in many fields of science. Recent advance in the fusion of nanomaterial, catalysis, and biochemistry has inspired the development of artificial enzymes implemented with desired catalytic features of natural ***, we review the redox chemistry of POD and compare its catalytic performance to graphene-based nanomaterials(G-NMs)as POD mimetic nanoenzymes bases on catalytic center, binding site, and carrier function. Based on the viewpoints of stereo chemistry and molecular kinetic and dynamics in heterogeneous system, we evaluate and compare the suitability of different NMs as artificial enzyme constituent. We propose that reevaluates design strategies of graphene-based peroxidase(G-POD) mimetic materials and emphasizes on their selectivity(role as catalytic center, binding site, or carrier) is of uttermost.

关键词： graphene graphene oxide graphene-based composites artificial enzymes biomimetic chemistry nanozymes functionalnanomaterials

Fatigue crack propagation across grain boundary of Al-Cu-Mg bicrystal based on crystal plasticity XFEM and cohesive zone model

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Journal of Materials Science & Technology 2022年第31期126卷 275-287页

作者： Qi Zhao Magd Abdel Wahab yong ling Zhiyi Liu School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China Faculty of Mechanical-Electrical and Computer Engineering School of Engineering and TechnologyVan Lang UniversityHo Chi Minh CityVietnam Soete Laboratory Faculty of Engineering and ArchitectureGhent UniversityTechnologiepark Zwijnaarde 903B-9052 ZwijnaardeBelgium School of Materials Science and Engineering Central South UniversityChangsha 410083China

In this paper,a methodology integrating crystal plasticity(CP),the eXtended finite element method(XFEM)and the cohesive zone model(CZM)is developed for an Al-Cu-Mg alloy to predict fatigue crack propagation(FCP)across grain boundary(GB)of Al-Cu-Mg alloy during stageІІ.One GB model is incor-porated into FCP constitutive law to describe grain interaction at GB.A bicrystal containing GB is built up to simulate FCP behavior through L participated *** features including GB characteristic,cumulative plastic strain(CPS)distribution and crystal slipping evidence can be *** numer-ical results are compared with published experimental data to check the accuracy of *** work demonstrates that the combination of CP containing GB constitutive laws,XFEM and CZM is a promising methodology in predicting twist angle-controlled crack deflection through GBs.

关键词： Grain boundary Twist angle Crystal plasticity Extended finite element method Fatigue crack propagation Cumulative plastic strain

ADJACENT MARTIX METHOD OF IDENTIFYING ISOMORPHISM TO PLANAR KINEMATIC CHAIN WITH MULTIPLE JOINTS AND HIGHER PAIRS

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 605-609页

作者： SONG Li HUANG yong CHENG ling Department of Mechanical Engineering Xiangtan University Xiangtan 411105 China

The adjacent matrix method for identifying isomorphism to planar kinematic chain with multiple joints and higher pairs is presented. The topological invariants of the planar kinematic chain can be calculated and compared by adjacent matrix. The quantity of calculation can be reduced effectively using the several divisions of bars and the reconfiguration of the adjacent matrix. As two structural characteristics of adjacent matrix, the number of division and division code are presented. It can be identified that two kinematic chains are isomorphic or not by comparing the structural characteristics of their adjacent matrixes using a method called matching row-to-row. This method may be applied to the planar linkage chain too. So, the methods of identifying isomorphism are unified in the planar kinematic chain that has or hasn＇t higher pairs with or without multiple joints. And it has some characters such as visual, simple and convenient for processing by computer, and so on.

关键词： Planar kinematic chain Higher pair Multiple joint Adjacent matrix Identifying isomorphism

AN EXTREMUM THEORY OF THE RESIDUAL FUNCTIONAL IN SOBOLEV SPACES W^(m,p)(Ω)

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Applied Mathematics and Mechanics(English Edition) 1992年第3期13卷 273-279页

作者： ling yong-yong Department of Applied Mathematics Tongji UniversityShanghai

In the present paper the concept and properties of the residual functional in Sobolev space are *** weak compactness,force condition,lower semi-continuity and convex of the residual functional are *** Sobolev space,the minimum principle of the residual functional is *** minimum existence theoreomfor J(u)=0 is given by the modern critical point *** the equivalence theorem or five equivalence forms for the residual functional equation are also proved.

关键词： Sobolev spaces residual functional infinite Banach spaces convex lower semi-continuity force condition minimum existence theorem

Study of network survivability based on multi-path routing mechanism

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Science in China(Series F) 2008年第11期51卷 1898-1907页

作者： HUANG Song XU yong ZHANG ling School of Computer Science and Engineering South China University of Technology Guangzhou 510641China

As an important secure routing mechanism, multi-path routing is one of the major ways to improve network efficiency and to guarantee the network security, which ensures the reliability of data transmission by using backup paths when the primary one is unavailable due to local node or link failures. Most current studies on multi-path routing mechanism are based on experiments or simulations. The resulta are usually specific application scenarios oriented heuristic algorithms, lacking universal significance. In this paper, a theoretic analysis is performed on the relationship between the multi-path routing policy, the network efficiency and its survivability. Starting with point-to-point communication network, an impactoriented analysis is made on the network interference under multi-path routing mechanism. Based on the analysis, the upper-limit of network performance under interference impact is also discussed.

关键词： multi-path routing network survivability interference impact

Combined Subchronic Toxicity of Bisphenol A and Dibutyl Phthalate on Male Rats

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Biomedical and Environmental Sciences 2013年第1期26卷 63-69页

作者： ZHANG Wen Zhong yong ling JIA Xu Dong LI Ning FAN yong Xiang China National Center for Food Safety Risk Assessment

Objective To evaluate the combined subchronic toxicity of bisphenol A（BPA） and dibutyl phthalate（DBP） in male Sprague Dawley（SD） *** Forty 4‐week‐old male rats weighing 115‐125 g were randomly divided into BPA‐treated,DBP‐treated group,BPA＋DBP‐treated and control groups and fed with a soy‐ and alfalfa‐free diet containing 285.4 ppm BPA,285.4 ppm DBP,285.4 ppm BPA plus 285.4 ppm DBP,and a control diet,respectively,for 90 consecutive *** the end of the study,the animals were sacrificed by exsanguination via the carotid artery under diethyl etherane aesthesia and ***,including liver,kidneys,spleen,thymus,heart,brain,and testis underwent pathological *** androgen receptor（AR）,gonadotropin‐releasing hormone receptor（GNRHR）,and progesterone hormone receptor（PR） genes from the hypothalamus were detected by real‐time *** biomedical parameters were *** No significant difference was found in food intake,body weight,tissue weight,organ/brain weight ratio,and biomedical parameters among the four groups（P〉0.05）.However,BPA and DBP up‐regulated AR,PR and GNRHR expression levels in rats and showed a synergistic or an additive effect in the BPA＋DBP *** The combined subchronic toxicity of BPA and DBP is synergistic or additive in male SD rats.

关键词： Bisphenol A Dibutyl phthalate Combined subchronic toxicity Sprague dawley rat Endocrine disruption

Molecular regulation of sucrose catabolism and sugar transport for development~ defence and phloem function

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Journal of Integrative Plant Biology 2017年第5期59卷 322-335页

作者： Jun Li Limin Wu Ryan Foster yong-ling Ruan Australia-China Research Centre for Crop Improvement and School of Environmental and Life Sciences The University of NewcastleNSW 2308 Australia CSIRO Agriculture Canberra ACT 26oi Australia

Sucrose （Suc） is the major end product of photosynthesis in mesophyll cells of most vascular plants. It is loaded into phloem of mature leaves for long-distance translocation to non-photosynthetic organs where it is unloaded for diverse uses. Clearly, Suc transport and metabolism is central to plant growth and development and the functionality of the entire vascular system. Despite vast information in the literature about the physiological roles of individual sugar metabolic enzymes and transporters, there is a lack of systematic evaluation about their molecular regulation from transcriptional to post-translational levels. Knowledge on this topic is essential for understanding and improving plant development, optimizing resource distri- bution and increasing crop productivity. We therefore focused our analyses on molecular control of key players in Suc metabolism and transport, including：（i） the identifica- tion of promoter elements responsive to sugars and hormones or targeted by transcription factors and micro- RNAs degrading transcripts of target genes; and （ii） modulation of enzyme and transporter activities through protein-protein interactions and other post-translational modifications. We have highlighted major remaining questions and discussed opportunities to exploit current understanding to gain new insights into molecular control of carbon partitioning for improving plant performance.

关键词： William J. Lucas University of California Davis USA

Numerical Simulation of Stress and Deformation for a Duplex Stainless Steel Impeller during Casting and Heat Treatment Processes

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Journal of Materials Science & Technology 2008年第3期24卷 364-368页

作者： Lugui CHEN yong ling Xiuhong KANG Lijun XIA Dianzhong LI Shenyang National Laboratory for Materials Science Institute of Metal Research Shenyang 110016 China WTCM Foundry Center Zwijnaarde Belgium

A large-scale, thin wall duplex stainless steel impeller with complex geometry was deformed severely and unpredictably during casting and heat treatment processes resulted in dimensional failure for the final part. In this paper, the distortion of the impeller during casting and heat treatment was calculated. A commercial software, Experto-ViewCast, was used to simulate the transient heat transfer, solidification and mechanical behaviors during the casting and the heat treatment process. The coupled set of governing differential equations for mass, energy and mechanical balance were solved by finite control volume and finite element method. A thermoelastic-visco-plastic rheological model was used to compute the constrained shrinkage of the casting. At each time increment, a coupling of the heat transfer and mechanics was performed. Comparison of the experimental measurements with the model predictions showed good agreement. From the calculated displacements of key points of the blade, the proper inverse displacements were determined to provide an optimum casting pattern and to achieve a uniform and reasonable machining allowance for both faces of the blade.

关键词： Numerical simulation Impeller casting Heat treatment Distortion Modeling