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Influence Factors Analysis of Fe-C Alloy Blocking Layer in the Electromagnetic Induction-Controlled Automated Steel Teeming Technology

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Acta Metallurgica Sinica(English Letters) 2020年第5期33卷 671-678页

作者： Ming He Xian-Liang Li qing-wei wang Qiang wang Zhi-Yuan Liu Chong-Jun wang Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Tangshan Heavy Plate Company Limited Tangshan 063610China

In the electromagnetic induction-controlled automated steel teeming(EICAST)technology of ladle,the height and location of the blocking layer are critical factors to determine the structure size and installation location of induction ***,they are also the key parameters affecting the successful implementation of this new *** this paper,the influence of the liquid steel temperature,the holding time and the alloy composition on the height and location of the blocking layer were studied by numerical *** simulation results were verified by 40 t ladle industrial ***,the regulation approach of the blocking layer was determined,and the determination process of coil size and its installation location were also *** results show that the location of the blocking layer moves down with the increase in the liquid steel temperature and the holding *** height of the blocking layer decreases with the increase in the liquid steel temperature;however,it increases with the increase in the holding *** height and location of the blocking layer can be largely adjusted by changing the alloy composition of filling particles in the upper *** the liquid steel temperature is 1550℃,the holding time is 180 min and the alloy composition is confirmed,the melting layer height is 120 mm,and the blocking layer height is 129 mm,which are beneficial to design and installation of induction *** results are very important for the industrial implementation of the EICAST technology.

关键词： Electromagnetic induction-controlled automated steel teeming(EICAST) Blocking layer Liquid steel temperature Holding time Alloy composition

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The effect of diphenylamine on the electronic,optical,and charge transport properties of BTD-based derivative:Insights from theory

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Chinese Chemical Letters 2011年第11期22卷 1383-1386页

作者： Bo Hu Chan Yao qing wei wang Xu Ri Huang Faculty of Chemistry Jilin Normal University Siping 136000 China Key Laboratory of Preparation and Applications of Environmental Friendly Materials Jilin Normal University Ministry of Education Siping 136000 China State Key Laboratory of Theoretical and Computational Chemistry Jilin University Changchun 130023 China

Theoretical investigations have been performed to explore the variation in electronic,optical,and charge transport properties upon the change of the chemical composition along the backbone in 2,1,3-benzothiadiazole（BTD）-based *** difference between hole and electron transportations with the charge hopping model indicates studied BTD-based derivative can be used as good ambipolar transport material in organic light-emitting diodes.

关键词： Diphenylamine 2 1 3-Benzothiadiazole Electronic and optical properties Reorganization energy

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Electronic Effect of Carbon Support on Pt Catalyst Supported on Graphite Intercalation Compound

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Chemical Research in Chinese Universities 2010年第3期26卷 465-471页

作者： wei Ang wang qing-jing ZHAO Xiao-hui ZHANG Shu-yong Key Lab of Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China

Graphite intercalation compounds（GIC） were tested as an experimental model for studying the electronic effect of carbon support on the catalytic activity and poisoning tolerance of Pt catalyst for direct methanol fuel cells. The GIC samples with different intercalation degrees were prepared by electrolyzing graphite flake in H2SO4 for varying the periods of time. The GIC-supported Pt catalyst was deposited electrochemically. The catalytic activity and poisoning tolerance of the GIC-supported Pt catalysts were evaluated. It was found that GIC with sulfate anion as intercalate was able to catalyze methanol electrooxidation, which could be related to the positive charges generated on the graphite layer upon intercalation. As intercalation degree increased, the catalytic activity of the GIC-supported Pt catalyst decreased while the poisoning tolerance improved. This suggests that electron donation from support to catalyst had great effect on both catalytic activity and poisoning tolerance of Pt catalyst. And intercalation can be adopted as another important way to make modification on carboneous catalyst support.

关键词： Catalyst support Electronic effect Graphite intercalation compound Catalytic activity Poisoning tolerance

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Electrochemical hydrogen storage properties of melt-spun Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy

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Frontiers of physics 2011年第2期6卷 209-213页

作者： Jian wang Guang-bo CHE qing-wei wang Wan-xi ZHANG Li-min wang Key Laboratory of Preparation and Applications of Environmental Friendly Materials （Ministry of Education） Jilin Normal University Siping 136000 China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

The Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy samples were synthesized by melt-spinning technique at the different wheel velocity （cooling rate）, and the structure and electrochenfical hydrogen storage properties were investigated. The result indicated that the structure of the melt-spun ribbons mainly contains C14 Laves phase and V-based solid solution phase. The discharge capacity, cyclic stability, high-rate discharge ability and electrochemical kinetic of the alloy electrodes are correlated with the cooling rate （wheel velocity）, and the maximum discharge capacity is over 200 mA.h/g at the wheel velocity of 20 m/s.

关键词： Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy melt-spinning hydrogen storage electrochemical prop-erties

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Reactive Oxygen Species Scavenging Enzymes and Down-Adjustment of Metabolism Level in Mitochondria Associated with Desiccation-Tolerance Acquisition of Maize Embryo

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Journal of Integrative Plant Biology 2009年第7期51卷 638-645页

作者： Jing-Hua Wu wei-qing wang Song-Quan Song Hong-Yan Cheng Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

It is a well-known fact that a mature seed can survive losing most of its water, yet how seeds acquire desiccation- tolerance is not well understood. Through sampling maize embryos of different developmental stages and comparatively studying the integrity, oxygen consumption rate and activities of antioxidant enzymes in the mitochondria, the main origin site of reactive oxygen species （ROS） production in seed cells, we found that before an embryo achieves desiccation-tolerance, its mitochondria shows a more active metabolism, and might produce more ROS and therefore need a more effective ROS scavenging system. However, embryo dehydration in this developmental stage declined the activities of most main antioxidant enzymes and accumulated thiobarbituric acid-reactive products in mitochondria, and then destroyed the structure and functional integrity of mitochondria. In physiologically-matured embryos （dehydration- tolerant）, mitochondria showed lower metabolism levels, and no decline in ROS scavenging enzyme activities and less accumulation of thiobarbituric acid-reactive products after embryo dehydration. These data indicate that seed desiccation- tolerance acquisition might be associated with down-adjustment of the metabolism level in the late development stage, resulting in less ROS production, and ROS scavenging enzymes becoming desiccation-tolerant and then ensuring the structure and functional integrity of mitochondria.

关键词： desiccation-tolerance developing embryo mitochondria reactive oxygen species scavenging enzymes

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A low-noise, high-SNR balanced homodyne detector for the bright squeezed state measurement in 1–100 kHz range

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Chinese Physics B 2020年第3期29卷 215-220页

作者： Jin-Rong wang qing-wei wang Long Tian Jing Su Yao-Hui Zheng State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

We report a low-noise, high-signal-to-noise-ratio(SNR) balanced homodyne detector based on the standard transimpedance amplifier circuit and the inductance and capacitance combination for the measurement of the bright squeezed state in the range from 1 kHz to 100 kHz. A capacitance is mounted at the input end of the AC branch to prevent the DC photocurrent from entering the AC branch and avoid AC branch saturation. By adding a switch at the DC branch,the DC branch can be flexibly turned on and off on different occasions. When the switch is on, the DC output provides a monitor signal for laser beam alignment. When the switch is off, the electronic noise of the AC branch is greatly reduced at audio-frequency band due to immunity to the impedance of the DC branch, hence the SNR of the AC branch is significantly improved. As a result, the electronic noise of the AC branch is close to -125 dBm, and the maximum SNR of the AC branch is 48 dB with the incident power of 8 mW in the range from 1 kHz to 100 kHz. The developed photodetector paves a path for measuring the bright squeezed state at audio-frequency band.

关键词： quantum optics photodetector low-noise audio band

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Metabolomics-based comparative analysis of the effects of host and environment on Viscum coloratum metabolites and antioxidative activities

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Journal of Pharmaceutical Analysis 2022年第2期12卷 243-252页

作者： Rui-Zhen Zhang Jing-Tao Zhao wei-qing wang Rong-Hua Fan Rong Rong Zhi-Guo Yu Yun-Li Zhao Department of Pharmaceutical Analysis School of PharmacyShenyang Pharmaceutical UniversityShenyang110016China School of Pharmacy University College London29-39 Brunswick SquareBloomsuryLondonWC1N 1AXUK Department of Sanitary Inspection School of Public HealthShenyang Medical CollegeShenyang110034China

Viscum coloratum(Kom.)Nakai is a well-known medicinal hemiparasite widely distributed in *** synthesis and accumulation of its metabolites are affected by both environmental factors and the host plants,while the latter of which is usually *** purpose of this study was to comprehensively evaluate the effects of host and habitat on the metabolites in *** through multiple chemical and biological *** metabolite profile of *** harvested from three different host plants in two habitats were determined by multiple chemical methods including high-performance liquid chromatography-ultraviolet(HPLC-UV),gas chromatography-flame ionization detector(GC-FID)and ultra-performance liquid chromatography quadrupole time of flight mass spectrometry(UPLC-QTOF/MS).The differences in antioxidant efficacy of *** were determined based on multiple in vitro *** multivariate statistical analysis and data fusion strategy were applied to analyze the differences in metabolite profile and antioxidant activity of *** indicated that the metabolite profile obtained by various chemical approaches was simultaneously affected by host and environment factors,and the environment plays a key ***,three main differential metabolites between two environment groups were *** results of antioxidant assay indicated that the environment has greater effects on the biological activity of *** than the ***,we conclude that the integration of various chemical and biological approaches combined with multivariate statistical and data fusion analysis,which can determine the influences of host plant and habitat on the metabolites,is a powerful strategy to control the quality of semi-parasitic herbal medicine.

关键词： Viscum coloratum Host Environment Plant metabolomics Multivariate statistical analysis Biological activity

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SYNTHESIS OF ALLANTOIN USING HETEROPOLY COMPOUNDS AS CATALYSTS

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Chinese Chemical Letters 1995年第4期6卷 337-338页

作者： Sui Mei ZHANG Feng Lian ZHAO wei qing wang(Department of Chemical Engineering, Harbin Engineering University,Harbin, 150001) Harbin Engn Univ Dept Chem Engn Harbin 150001 Peoples R China

Allantoin was synthesized with the yield as high as 68.5% using H3PW12O40. xH(2)O as catalyst. Optimum conditions for the synthesis were determined. It. was found that the heteropoly compound has higher catalytic acti... 详细信息

关键词： AS SYNTHESIS OF ALLANTOIN USING HETEROPOLY COMPOUNDS AS CATALYSTS

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Cross-talk between MEK1/2-ERK1/2 signaling and G protein-couple signaling in synoviocytes of collagen-induced arthritis rats

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Chinese Medical Journal 2008年第22期121卷 2278-2283页

作者： ZHANG Ling-ling wei wei wang qing-tong CHEN Jing-yu CHEN Yin Institute of Clinical Pharmacology Anhui Medical University Key Laboratory of Anti-inflammatory and Immuno-pharmacology in Anhui Province Key Laboratory of Research & Development of Chinese Medicine in Anhui Province Hefei Anhui 230032 China

Background Signaling pathways that regulate the production of cytokines and destructive enzymes have been implicated in rheumatoid arthritis （RA） pathogenesis. There are co-relations between signaling pathways. The aim of this study was to investigate interactions and cross-talks between MEK1/2-extracellular signal-related kinase （ERK1/2） signaling and G protein-couple signaling in synoviocytes of collagen-induced arthritis （CIA） rats by the stimulation of interleukin-1 （IL-1）, U0126, isoprenaline hydrochloride and aminophyline respectively. Methods Twenty Sprague-Dawley （SD） rats were induced by chicken type II collagen. Synoviocytes of CIA rats were isolated and cultured. The expressions of Gi, phosphorylated MEK1/2 （p-MEK1/2） and phosphorylated ERK1/2 （p-ERK1/2） were detected by Western blotting, cAMP level and protein kinase A （PKA） activity were measured by radioimmunoassay and kinase-glo luminescent kinase assay respectively. Results There was remarkable inflammation in CIA rats accompanied by swelling paws, hyperplastic synovium, pannus and cartilage erosion, cAMP level and PKA activity of synoviocytes decreased. Gi, p-ERK1/2 and p-MEK1/2 increased, rlL-la improved the expression of Gi, p-ERK1/2 and p-MEK1/2, cAMP and PKA increased with stimulation of rlL-1α. U0126 inhibited Gi, cAMP and PKA of synoviocytes stimulated by rlL-la. Isoprenaline hydrochloride enhanced Gi, cAMP and PKA, but had no effects on p-MEK1/2 and p-ERK1/2. Aminophyline increased cAMP and PKA, but inhibited p-MEK1/2 and p-ERK1/2. Conclusions Mitogen-activated protein kinases （MAPKs） and G protein-couple signaling are associated with synovitis. There are cross talks between MAPKs and G protein-couple signaling. The two signaling pathways represent potential therapeutic targets for RA.

关键词： arthritis signaling cross-talk G protein MAP kinases

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Plant Pb Contents in Elevation Zones of the Changbai Mountain National Nature Reserve, China

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Pedosphere 2007年第2期17卷 229-234页

作者： BAI Jun-Hong CUI Bao-Shan DENG wei wang qing-Gai DING Qiu-Yi State Key Lab of Water Environment Simulation School of Environment Beijng Normal University 19 Xinjiekouwai Road Haidian District Beijing 100101 （China）. Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610051 （China） Appraisal Center of Environment and Engineering State Environment Protection Administration of China Beijing 100012 （China）

Typical plants and soils of four elevation zones, mountain tundra （Zone A）, Betula ermanii forest （Zone B）, mountain dark coniferous forest （Zone C）, and mountain coniferous and broad-leaf forest （Zone D）, along the vertical gradient of the northern mountain slope of the Changbai Mountain National Nature Reserve, Jilin Province, China, were sampled to study the relationship between plant and soil Pb, and to compare the Pb levels in typical plant types within the same elevation zone. The Pb contents in the soil and plant samples were measured by using a flame atomic absorption spectrophotometer. The results showed that the average plant Pb contents of the four plant elevation zones were lower than the average worldwide level, except for Zone B. Compared with the average level in China or the average worldwide level, the soil Pb levels of the four plant zones were higher, with Zones D and B having the lowest and highest averages, respectively. Plant Pb levels fluctuated from the upper to the lower zones, in a pattern of low-high-low-high, which was the same as that of the soils in the four zones. Furthermore, plant Pb was closely related to soil Pb. Depending on the plant species and plant parts, large differences were found in the Pb levels of typical plants within each zone. In Zone A, Vaccinium uliginosum and Rhododendron redowskianum had higher Pb levels than the other plants. In Zone C, the Pb levels in the branches of both plant species were higher than those in the leaves, which was contrary to Zone D. In Zone B, the Pb levels in the plant parts varied greatly with plant species.

关键词： elevation zone plant Pb Pb uptake soil Pb typical plants

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