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Journal of Iron and Steel Research International 2017年第10期24卷 1048-1058页

作者： Meng-xuan Guo Kai-xiang Gao wu-rong wang Xi-cheng Wei School of Materials Science and Engineering Shanghai UniversityShanghai 200072China

Al-Si coated ultra-high strength steel（UHSS）has been commonly applied in hot stamping *** influence of austenitizing temperature on microstructure of Al-Si coating of UHSS during hot stamping process and its tribological behavior against H13 steel under elevated temperature were simulatively *** austenitizing temperature of Al-Si coated UHSS and its microstructual evolution were confirmed and analyzed by differential scanning calorimetry and scanning electron microscopy.A novel approach to tribological testing by replicating hot stamping process temperature history was *** show that the hard and stable phases Fe_2Al_5＋FeAl_2 formed on Al-Si coating surface after exposure to 930°C for 5 min,which was found to be correlated to the tribological behavior of *** friction coefficient of coated steel was more stable and higher than that of uncoated *** main wear mechanism of Al-Si coated UHSS was adhesion wear,while abrasive wear was dominant for the uncoated UHSS.

关键词： Hot stamping Al-Si coating Ultra-high strength steel Intermetallic compound Diffusion Friction coefficient Adhesive wear

Technological innovations of electric arc furnace bottom-blowing in China

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Journal of Iron and Steel Research International 2019年第9期26卷 909-916页

作者： Guang-sheng Wei rong Zhu Yun wang Xue-tao wu Kai Dong School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-End Metal Materials University of Science and Technology BeijingBeijing 100083China

Nowadays, in China, the bottom-blowing technique plays an important role in accelerating the molten bath stirring and promoting the metallurgical reactions in electric arc furnace (EAF) steelmaking. The innovations of bottom-blowing technologies in EAF steelmaking were reviewed. The optimized bottom-blowing arrangement in EAF based on the furnace structure and the position of electrodes was introduced, and the fluid flow characteristics of EAF molten bath with bottomblowing were analyzed. Furthermore, bottom-blowing CO2 in EAF can facilitate the carbon-oxygen reaction reaching equilibrium and decrease the content of nitrogen in molten steel due to its special metallurgical properties. Pulsating bottom-blowing in EAF can effectively improve the molten bath stirring through the action of the unsteady bottom blowing gas streams, which could make the fluid flow field more disorderly than the steady bottom-blowing. And submerged O2 injection with CO2 in EAF can noticeably strengthen the EAF molten bath stirring, increase the production efficiency and improve the molten steel quality.

关键词： Electric arc furnace Bottom-blowing CO2 Pulsating bottom-blowing EAF combined blowing technology Submerged O2 injection with CO2

Current understanding of maize and rice defense against insect herbivores

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Plant Diversity 2018年第4期40卷 189-195页

作者： Jinfeng Qi Saif ul Malook guojing Shen Lei Gao Cuiping Zhang Jing Li Jingxiong Zhang Lei wang Jianqiang wu Department of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences

Plants have sophisticated defense systems to fend off insect herbivores. How plants defend against herbivores in dicotyledonous plants, such as Arabidopsis and tobacco, have been relatively well studied, yet little is known about the defense responses in monocotyledons. Here, we review the current un- derstanding of rice （Oryza sativa） and maize （Zea rnays） defense against insects. In rice and maize, elicitors derived from insect herbivore oral secretions or oviposition fluids activate phytohormone signaling, and transcriptomic changes mediated mainly by transcription factors lead to accumulation of defense-related secondary metabolites. Direct defenses, such as trypsin protein inhibitors in rice and benzoxazinoids in maize, have anti-digestive or toxic effects on insect herbivores. Herbivory-induced plant volatiles, such as terpenes, are indirect defenses, which attract the natural enemies of herbivores. R gene-mediated defenses against herbivores are also discussed.

关键词： Rice Maize Herbivores Secondary metabolites R genes

Grain proteomic analysis reveals central stress responsive proteins caused by wheat-Haynaldia villosa 6VS/6AL translocation

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Journal of Integrative Agriculture 2020年第11期19卷 2628-2642页

作者： ZOU rong wu Ji-su wang Ruo-mei YAN Yue-ming College of Life Science Capital Normal UniversityBeijing 100048P.R.China Hubei Collaborative Innovation Center for Grain Industry(HCICGI) Yangtze UniversityJingzhou 434023P.R.China

Haynaldia villosa(2n=14,VV),a wild grass of the subtribe Triticeae,serves as potential gene resources for wheat genetic *** this study,the proteome characterization during grain development of Yangmai 5 and Yangmai *** 6VS/6AL translocation line was investigated by a comparative proteomic ***-dimensional electrophoresis identified 81 differentially accumulated proteins(DAPs)during five grain developmental stages in *** translocation *** proteins were mainly involved in stress defense,storage protein,energy metabolism,protein metabolism and folding,carbon metabolism,nitrogen metabolism,and starch *** particular,6VS/6AL translocation led to significant upregulation of 36 DAPs and specific expression of 11 DAPs such as chitinase,thaumatin-like proteins,glutathione transferase,α-amylase inhibitor,heat shock proteins,and betaine aldehyde *** proteins mainly involved in biotic and abiotic stress *** analysis found that the upstream 1500 promoter regions of these stress-responsive DAP genes contained multiple high-frequency cis-acting elements related to stress defense such as abscisic acid response element ABRE,methyl jasmonate(MeJA)-response element TGACG-motif and CGTCA-motif involved in oxidative stress and antioxidant response element(ARE).RNA-seq and RT-qPCR analyses revealed the high expression of these stress-defensive DAP genes in the developing grains,particularly at the early-middle grain filling *** results demonstrated that 6VS chromosome of *** contains abundant stress-defensive proteins that have potential values for wheat genetic improvement.

关键词： 6VS/6AL translocation grain development proteome DAPs cis-acting elements adverse defense

Electrochemical performance of a nickel-rich LiNi0.6Co0.2Mn0.2O2 cathode material for lithium-ion batteries under different cut-off voltages

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International Journal of Minerals,Metallurgy and Materials 2017年第3期24卷 342-351页

作者： Kai-lin Cheng Dao-bin Mu Bo-rong wu Lei wang Ying Jiang Rui wang Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081 China

A spherical-like Ni0.6Co0.2Mn0.2(OH)2precursor was tuned homogeneously to synthesize LiNi0.6Co0.2Mn0.2O2as a cathode material for lithium-ion batteries. The effects of calcination temperature on the crystal structure, morphology, and the electrochemical performance of the as-prepared LiNi0.6Co0.2Mn0.2O2were investigated in detail. The as-prepared material was characterized by X-ray diffraction, scanning electron microscopy, laser particle size analysis, charge–discharge tests, and cyclic voltammetry measurements. The results show that the spherical-like LiNi0.6Co0.2Mn0.2O2material obtained by calcination at 900°C displayed the most significant layered structure among samples calcined at various temperatures, with a particle size of approximately 10 μm. It delivered an initial discharge capacity of 189.2 mAh•g−1at 0.2C with a capacity retention of 94.0% after 100 cycles between 2.7 and 4.3 V. The as-prepared cathode material also exhibited good rate performance, with a discharge capacity of 119.6 mAh•g−1at 5C. Furthermore, within the cut-off voltage ranges from 2.7 to 4.3, 4.4, and 4.5 V, the initial discharge capacities of the calcined samples were 170.7, 180.9, and 192.8 mAh•g−1, respectively, at a rate of 1C. The corresponding retentions were 86.8%, 80.3%, and 74.4% after 200 cycles, respectively. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.

关键词： Calcination Cathodes Cobalt Crystal structure Cyclic voltammetry Electric batteries Electric discharges Electrochemical properties Electrodes Ions Lithium Lithium alloys Lithium compounds Manganese Nickel Particle size Particle size analysis Scanning electron microscopy Secondary batteries X ray diffraction

c-Jun N-terminal kinase 3 deficiency protects axotomized retinal ganglion cells via affecting mitochondria involved apoptosis pathway

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International Journal of Ophthalmology(English edition) 2019年第1期12卷 30-37页

作者： rong-rong wang Cheng-Fang Li De-Zu wang Cheng-wu Zhang Gui-Xiang Liu Qingdao University Department of Ophthalmology Jimo Traditional Chinese Medicine Hospital Department of Ophthalmology Affiliated Qingdao Hiser Hospital of Qingdao University Institute of Advanced Materials Nanjing Tech University Department of Ophthalmology Affiliated Hospital of the Medical College of Qingdao University

AIM: To illustrate the isoform-specific role and mechanism of c-Jun N-terminal kinases(JNKs) in mouse optic nerve axotomy induced neurotrauma. METHODS: We firstly investigated the expression of JNK1, JNK2, and JNK3 in the retinal ganglion cells(RGCs) by double-immunofluorescent staining. Then we created optic nerve axotomy model in wild type as well as JNK1, JNK2, JNK3, isoform specific gene deficiency mice. With that, we checked the protein expression profile of JNKs and its active form, and quantified the survival RGCs number by immunofluorescence staining. We further explored the molecules underlying isoform specific protective effect by real-time polymerase chain reaction(PCR) and Western blotting assay. RESULTS: We found that all the three isoforms of JNKs were expressed in the RGCs. Deficiency of JNK3, but not JNK1 or JNK2, significantly alleviated optic nerve axotomyinduced RGCs apoptosis. We further established that expression of Noxa, a pro-apoptotic member of BH3 family, was significantly suppressed only in JNK3 gene deficiency mice. But tumor necrosis factor receptor 1(TNFR1) and Fas, two key modulators of death receptor mediated apoptosis pathway, did not display obvious change in the expression. CONCLUSION: It is suggested that mitochondria mediated apoptosis, but not death receptor mediated apoptosis got involved in the JNK3 gene deficiency induced RGCs protection. Our study provides a novel insight into the isoform-specific role of JNKs in neurotrauma and indicates some cues for its therapeutics.

关键词： retinal ganglion cells c-Jun N-terminal kinases optic nerve mitochondria Noxa neurotrauma

The effects of factor generalization scales on the reproduction of dynamic urban growth

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Geo-Spatial Information Science 2022年第3期25卷 457-475页

作者： Yongjiu Feng Peiqi wu Xiaohua Tong Pengshuo Li rong wang Yilun Zhou Jiafeng wang Jinyu Zhao College of Surveying&Geo-Informatics Tongji UniversityShanghaiChina The Shanghai Key Laboratory of Space Mapping and Remote Sensing for Planetary Exploration Tongji UniversityShanghaiChina

The production and selection of driving factors are essential to building a strong Cellular Automata(CA)model of dynamic urban growth simulation.A critical issue that should be addressed is how the spatial representation and the generalization scale of driving factors affect the CA modeling and the simulation *** is challenging to evaluate the effectiveness of the selected driving factors because they have no true *** explore the impacts of the generalization scales,we produced nine sets of driving factors at nine scales to calibrate the CA models based on the Particle Swarm Optimization(CAPSO)and applied them to simulate urban growth of Suzhou during *** results show that the driving factors at a smaller scale have much better performance in explaining urban growth simulations as inferred by the Explained Residual Deviance(ERD)of the Generalized Additive Models(GAMs).Specifically,the ERD declined from 51.9%to 45.9%as the factor scale became larger during 2000-2020,but there was a peak value(52.2%)at *** all simulations during 2000-2020,the CAPSO models with larger-scale factors have slightly lower overall accuracy and Figure-of-Merit(FOM),which respectively decreased by 3.1%and 4.4%as compared to the CA models with scale-free *** concluded that the driving factors at a smaller scale(200~400 m for point-like facilities and 7~14 m for line-like facilities)can build more accurate CA models to simulate urban growth patterns,and the optimal scale for factors can be identified using the *** study contributes to the methods of evaluating the effectiveness of driving factor production and reveals the impacts of spatial representation of factors on the CA modeling and simulation considering the factor generalization scales.

关键词： Cellular automata urban growth driving factors scale effects generalized additive model

Towards High-Energy and Anti-Self-Discharge Zn-Ion Hybrid Supercapacitors with New Understanding of the Electrochemistry

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Nano-Micro Letters 2021年第6期13卷 268-283页

作者： Yang Li wang Yang wu Yang Ziqi wang Jianhua rong Guoxiu wang Chengjun Xu Feiyu Kang Liubing Dong College of Chemistry and Materials Science Jinan UniversityGuangzhou 511443People’s Republic of China Centre for Clean Energy Technology University of Technology SydneySydneyNSW 2007Australia Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055People’s Republic of China

Aqueous Zn-ion hybrid supercapacitors(ZHSs)are increasingly being studied as a novel electrochemical energy storage system with prominent electrochemical performance,high safety and low ***,high-energy and anti-self-discharge ZHSs are realized based on the fibrous carbon cathodes with hierarchically porous surface and O/N heteroatom functional *** porous surface of the fabricated free-standing fibrous carbon cathodes not only provides abundant active sites for divalent ion storage,but also optimizes ion transport ***,the cathodes show a high gravimetric capacity of 156 mAh g^(−1),superior rate capability(79 mAh g^(−1)with a very short charge/discharge time of 14 s)and exceptional cycling ***,hierarchical pore structure and suitable surface functional groups of the cathodes endow ZHSs with a high energy density of 127 Wh kg−1,a high power density of 15.3 kW kg^(−1)and good anti-self-discharge *** investigation reveals that ZHS electrochemistry involves cation adsorption/desorption and Zn_(4)SO_(4)(OH)_(6)·5H_(2)O formation/dissolution at low voltage and anion adsorption/desorption at high voltage on carbon *** roles of these reactions in energy storage of ZHSs are *** work not only paves a way for high-performance cathode materials of ZHSs,but also provides a deeper understanding of ZHS electrochemistry.

关键词： Zn-ion hybrid supercapacitor Carbon material Fibrous cathode Hierarchical pore structure High-energy

Deformation characteristic of semi-solid ZCuSn10 copper alloy during isothermal compression

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Rare Metals 2016年第8期35卷 620-626页

作者： Jia wang Han Xiao Long-Biao wu Hai-Lian Hu De-Hong Lu rong-Feng Zhou rong Zhou College of Materials Science and Engineering KunmingUniversity of Science and TechnologyKunming 650093China College of Mechanical Engineering Sichuan University ofScience and EngineeringZigong 643000China

The compression tests were carried out by Gleeble-1500 thermo-mechanical simulator with samples of semi-solid ZCuSnl0 alloy prepared by strain-induced melt activation （SIMA） process. The original microstruc- ture and the deformation temperature of semi-solid ZCuSnl0 alloy are different. The strain is 0.2, and the strain rate is 1 s-1 for the compression test. The results show that when the semi-solid ZCuSnl0 alloy was pre- pared by SIMA process, the liquid fraction of semi-solid microstructure increases, and the solid grain is smaller, more uniform and more inclined to be round as the roiling pre-deformation increasing. The results also indicate that the deformation resistance of ZCuSnl0 alloy in semi-solid state decreases with the deformation temperature increas- ing or the solid fraction of original microstructure de- creasing. The stress-strain curves of the isothermal compression can be divided into quasi-elastic deformation stage and plastic deformation stage, and there are three deformation zones in the samples after isothermal com- pression, namely the difficult deformation zone, the large deformation zone and the free deformation zone. In the three deformation zones, the main deformation mechanism is flow of liquid incorporating solid particles （FLS） mechanism, plastic deformation of solid particles （PDS） mechanism and liquid flow （LF） combining with FLS mechanism, respectively.

关键词： ZCuSn10 copper alloy Semi-solid Isothermal compression Deformation characteristic

Rearrangements of microtubule cytoskeleton in stomatal closure of Arabidopsis induced by nitric oxide

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Chinese Science Bulletin 2008年第6期53卷 848-852页

作者： ZHANG YongMei wu ZhongYi wang XueChen YU rong College of Life Sciences Capital Normal University Beijing 100037 China Beijing Agro-Biotechnology Research Center Beijing Academy of Agriculture and Forestry Sciences Beijing 100097 China State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University Beijing 100094 China

NO (nitric oxide), known as a key signal molecule in plant, plays important roles in regulation of stomatal movement. In this study, microtubule dynamics and its possible mechanism in the NO signal pathway were investigated. The results were as follows: (i) In vivo stomatal aperture assays revealed that both vinblastine (microtubule-disrupting drug) and SNP (exogenous NO donor) prevented stomatal opening in the light, and vinblastine even could enhance the inhibitory effect of SNP, whereas taxol (a microtubule-stabilizing agent) was able to reduce this effect; (ii) microtubules in the opening Arabi- dopsis guard cells expressing GFP:α-tubulin-6 (AtGFP:α-tubulin-6) were organized in parallel, straight and dense bundles, radiating from the ventral side to the dorsal side, and most of them were localized perpendicularly to the ventral wall; (iii) under the same environmental conditions, treated with SNP for 30 min, the radial arrays of microtubules in guard cells began to break down, twisted partially and be- came oblique or exhibited a random pattern; (iv) furthermore, the involvement of cytosolic Ca2+ in this event was tested. Stomatal aperture assays revealed that BAPTA-AM (a chelator of Ca2+) greatly sup- pressed the effect of NO on stomatal closure; however, it did not show the same function on stomatal closure induced by vinblastine. When BAPTA-AM was added to the SNP-pretreated solution, the SNP-induced disordered microtubulue cytoskeleton in guard cells underwent rearrangement in a time-dependent manner. After 30 min of treatment with BAPTA-AM, the cortical microtubules resumed the original radial distribution, almost the same as the control. All this indicates that NO may promote rearrangement of microtubule cytoskeleton via elevation of [Ca2+]cyt (free Ca2+ concentration in the cy- toplasm), finally leading to stomatal closure.

关键词：氧化一氮微管细胞骨架气孔运动气孔关闭钙离子