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Thermodynamic Calculation of Inclusion Formation in Mg-Al-Si-O System of 430 Stainless Steel Melts

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Journal of Iron and Steel Research International 2011年第2期18卷 14-17页

作者： jiang Zhou-hua li Shuang-jiang li Yang School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

A phase diagram was drawn through thermodynamic calculation to understand the equilibrium conditions of 2MgO · SiO2 , MgO · Al2O3 , 3Al2O3 · 2SIO2, and 2MgO·2Al2O3 · 5SiO2 formation in Mg-AI-Si-O system of 430 stainless steel melts at 1873 K. Further, the thermodynamic formation and transformation conditions of MgO · Al2O3 inclusion were discussed. The following results are obtained when ws, =0.26% and wo = 1.0 × 10^-5 in molten steel. The uniphase cordierite inclusion is difficult to exist stably; MgO· At203 inclusion cannot he formed in case of wAl being less than 1× 10^- 6 ; 3Al2O3 · 2SiO2 would change to MgO· Al2O3 and 2MgO · SiO2 in turn with increasing the Mg content when wAl is above 1.7× 10^- 6 ; with the formation of MgO · Al2O3 inclusion, A1 content increases with increasing Mg content when wMg is over 1. 7 × 10^- 9. For equilibrium condition and calculated steel composition, 2MgO·SiO2 inclusion would be formed ultimately and MgO · Al2O3 is almost inexistent.

关键词： phase diagram thermodynamic calculation MgO · Al2O3 inclusion 430 stainless steel

Silencing gamma-aminobutyric acid A receptor alpha 1 subunit expression and outward potassium current in developing cortical neurons

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Neural Regeneration Research 2011年第18期6卷 1404-1409页

作者： Tao Bo jiang li Jian li Xingfang li Kaihui Xing Department of Pediatrics Second Xiangya Hospital Central South University Changsha 410011 Hunan Province China

We used RNA interference （RNAi） to disrupt synthesis of the cortical neuronal y-aminobutyric acid A receptor （GABAAR） al in rats during development, and measured outward K＋ currents during neuronal electrical activity using whole-cell patch-clamp techniques. Three pairs of small interfering RNA （siRNA） for GABAAR al subunit were designed using OligoEngine RNAi software. This siRNA was found to effectively inhibited GABAAR al mRNA expression in cortical neuronal culture in vitro, but did not significantly affect neuronal survival. Outward K^currents were decreased, indicating that GABAAR al subunits in developing neurons participate in neuronal function by regulating outward K＋ current.

关键词： γ-aminobutyric acid A receptor al subunit neuron development outward potassium current

Effect of Black Plate on Corrosion Resistance of T5 Tinplate

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Journal of Iron and Steel Research International 2006年第2期13卷 59-64页

作者： HUANG Xing-qiao li Ning jiang li-min li De-yu Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 Heilongjiang China

The effect of black plate on corrosion resistance of T5 tinplate was studied by glow discharge spectrograph, X-ray diffractometer （XRD）, stress tester, roughness tester and metallographic microscope. The result shows that black plate influences corrosion resistance of T5 tinplate intensely. It also indicates that the increase of content of manganese, phosphorus, silicon and aluminum in black plate would reduce the corrosion resistance of T5 tinplate and the increase of degree of crystal orientation on （200） crystal face, ｜X-Y｜ value （internal stress difference within two orientation）, roughness and exposure degree of iron grain after the same acid wash of black plate would enhance the corrosion resistance of T5 tinplate and the grain number of black plate has small effect on corrosion resistance of T5 tinplate.

关键词： T5 tinplate black plate component crystal orientation internal stress corrosion resistance

Giant submucosal lipoma located in the descending colon: A case report and review of the literature

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World Journal of Gastroenterology 2007年第42期13卷 5664-5667页

作者： li jiang li-Sheng jiang Fu-Yu li Hui Ye Ning li Nan-Sheng Cheng Yong Zhou The First Department of General Surgery West China Hospital of Sichuan University Chengdu610041 Sichuan Province China

Colonic lipoma is an uncommon tumor of the gastrointestinal tract. Most cases are asymptomatic, with a small tumor size, and do not need any special treatment. However, we encountered one patient with a giant submucosal lipoma, with a maximum diameter of 8.5 cm, which exhibited symptoms such as intermittent lower abdominal pain, changes in bowel habits with passage of fresh blood and mucus per rectum, abdominal distension, anorexia and weight loss. Unfortunately, the possibility of colonic malignancy could not be precluded and leffc hemicolectomy was planned. The exact diagnosis of this special case was accomplished by intraoperative pathology. In the end, local resection was performed instead of left hemicolectomy. To the best of our knowledge, colonic lipoma exceeding 8 cm in diameter has not been previously reported. We, therefore, present this case and discuss age and sex factors, clinical and histopathological findings, diagnostic methods and treatment by reviewing the available literature, to serve as a reminder that colonic lipoma can also exist in patients with significant symptoms. In addition, intraoperative pathology should be investigated in those doubtful cases, so as to guide the exact diagnosis and treatment plan.

关键词： Colon lipoma Age, Diagnosis Therapy

Effects of arsenic on seed germination and physiological activities of wheat seedlings

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Journal of Environmental Sciences 2007年第6期19卷 725-732页

作者： li Chun-xi FENG Shu-li SHAO Yun jiang li-na LU Xu-yang HOU Xiao-li College of life Sciences Henan Normal University Xinxiang 453007 China

The effects of arsenic （As） were investigated on seed germination, root and shoot length and their biomass and some other factors to elucidate the toxicity of As. The results showed low concentrations of As （0-1 mg/kg） stimulated seed germination and the growth of root and shoot, however, these factors all decreased gradually at high concentrations of As （5-20 mg/kg）. The contents of O2^-, MDA, soluble protein and peroxidase （POD） activity all increased with increasing As concentrations. Soluble sugar content, ascorbate peroxidase （APX）, and superoxide dismutase （SOD） activities decreased at low concentrations of As, and increased at high concentrations of As. While acetylsalicylic acid （ASA） and chlorophyll contents, catalase （CAT） activity displayed increasing trend when the concentrations of As was lower than 1 mg/kg, and then decreasing trend. By polyacrylamide gel electrophoresis （PAGE）, As induced the expression of POD isozymes of wheat seedlings. As induced the expression of CAT isozymes but inhibited the expression of SOD isozymes of wheat seedlings at concentrations lower than 1 mg/kg. However, As inhibited the expression of CAT isozymes but induced the expression of SOD isozymes at concentrations higher than 5 mg/kg. The results indicated As could exert harmfulness in the early development stage of wheat at inappropriate concentrations.

关键词： arsenic wheat germination physiological activities

A QICAR Model for Metal Ion Toxicity Established via PLS Method

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Chemical Research in Chinese Universities 2013年第3期29卷 568-573页

作者： li Yu jiang Long li Xiao-li HU Yan WEN Jing-ya Resources and Environmental Research Academy North China Electric Power University Beijing 102206 P. R. China

The partial least squares（PLS） method was employed to establish a quantitative ion characteristics-activity relationship（QICAR） model for metal ion toxicity（EC50 of 15 metal ions）. The ion characteristics included AN（the atomic number）, AIP（the change in ionization potential, eV）, Xm（the electronegativity, eV）, AW（the atomic weight）, Xm2r（the covalent index）, △E0（the absolute difference between electrochemical potential of the ion and that of its first stable reduced state, eV）, ｜lgKoH｜（the absolute value of the lg of the first hydrolysis constant）, AR（the atomic radius, nm）, AR/AW（the ratio between atomic radius and atomic weight） and ap（the softness index） selected based on relative correlation analysis. The simulated and tested（with the other four metals） efficiency coefficients of the model are 0.88 and 0.96, respectively. The information revealed from the QICAR model indicates that the value of the metal ion toxicity was positively correlated with variables AN, AlP, Xm, AW and Xm2r; negatively correlated with variables AE0, ｜IgKoH｜, AR/AW, AR and ap, and ion characteristics △E0, Xm, σp and Xm2r were found to contribute more to the toxicity of metal ions via the accurate analysis method provided by PLS. The model could be used to predict the toxicity of the target metals and preliminary to assess combined pollution and environmental risk for heavy metals in the environments.

关键词： Quantitative ion characteristics-activity relationship Partial least square Metal ion characteristic Metal toxicity Accurate analysis

Dry matter production and panicle characteristics of high yield and good taste indica hybrid rice varieties

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Journal of Integrative Agriculture 2023年第5期22卷 1338-1350页

作者： li Min ZHU Da-wei jiang Ming-jin LUO De-qiang jiang Xue-hai JI Guang-mei li li-jiang ZHOU Wei-jia Rice Research Institute Guizhou Academy of Agricultural SciencesGuiyang 550006P.R.China Rice Product Quality Supervision and Inspection Center Ministry of Agriculture and Rural AffairsChina National Rice Research InstituteHangzhou 310006P.R.China

Indica hybrid rice(Oryza sativa) production aims to achieve two crucial targets: high yield and good taste. This study selected three types of indica hybrid rice according to grain yield and taste value, including high yield and good taste(HYGT), low yield and good taste(LYGT), and high yield and poor taste(HYPT), to analyze yield components,corresponding growth characteristics, and rice taste quality. When values were averaged across varieties and years,there were almost no differences in taste value between HYGT and LYGT;HYGT showed a significant increase in yield,owing to a higher number of panicles and spikelets per panicle, with a respective increment of 16.2 and 20.6%. The higher grain yield of HYGT compared with LYGT was attributed to three key factors: a higher leaf area index(LAI) during heading, a higher ratio of grain to leaf, and a higher biomass accumulation at maturity. HYGT and HYPT achieved similar high yields;however, HYGT had more panicle numbers and lower grain weight. In addition, HYGT showed a significantly higher taste value than HYPT, attributed to its significantly lower protein and amylose contents, with reductions of 8.8and 15.7%, respectively. Lower protein and amylose contents might be caused by a proper matter translocation from vegetative organs to panicle. This study suggested that reasonable panicle characteristics and translocation efficiency from vegetative organs to panicle during heading to maturity are the key factors in balancing yield and rice taste *** results will provide valuable insights for rice breeders to improve the grain yield and quality of indica hybrid rice.

关键词： indica hybrid rice grain yield taste quality growth characteristics

An effective method for the preparation of chlorolactones

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Chinese Chemical Letters 2011年第4期22卷 431-434页

作者： Min Zhu li li jiang Ying Tong Hui Zhang College of Biological and Environmental Sciences Zhejiang Shuren University Hangzhou 310015 China

The effective chlorolactonization of alkenoic acids with（diacetoxyiodo）benzene and lithium chloride under mild conditions have been *** show that various 4-pentenoic acids react with（diacetoxyiodo）benzene and lithium chloride fluently in CH_3OH at room temperature,obtaining five-membered chlorolactones in good yields in short *** alkenoic acids,such as 3-butenoic acid and trans 3-hexenoic acid give some more complicated results,and 4-pentynoic acid provides a chloroenol lactone with Z configuration in 40%of yield.

关键词： Chlorolactone (Diacetoxyiodo)benzene Alkenoic acid Preparation

Microtexture Evolution and Grain Boundary Character Distribution of Interstitial-Free Steels With Moderate Levels of Cold Rolling Reductions

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Journal of Iron and Steel Research International 2013年第12期20卷 47-52页

作者： YANG Jing-jing FAN li-xia JIA Juan WU Run SONG Xin-li jiang li-li School of Materials and Metallurgy Wuhan University of Science and Technology

High-strength interstitial-free steel sheets have very good deep drawability when processed to have { 111 } recrystallization texture. The microtexture evolution and grain boundary character distribution of interstitial-free steels as a function of moderate levels of cold rolling reductions were investigated by the metallographic microscopy and electron backscatter diffraction technique. The results showed that there was a close relationship between micro- texture and grain boundary character distribution for interstitial-free steel, especially the distribution and features of some specific types of coincident-site lattice boundaries. In addition, a-fiber texture was weakened to vanish while 7- fiber texture strengthened gradually as cold rolling reduction was increased from 20% to 75 % for cold rolled and an- nealed samples. Accordingly, increasing the rolling reduction from 20 % to 750% would lead to a significant increase in the proportion of ∑3 boundaries. Also, it was found that the microtexture of 20% cold rolled sample would induce a high frequency of ∑11 grain boundaries, but the microtexture of 75% cold rolled sample would produce more ∑7 and ∑17 grain boundaries. It was suggested that texture played a significant role in the formation of grain boundary character distribution.

关键词： interstitial-free steel mierotexture evolution grain boundary character distribution electron backscatter diffraction