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Preparation of Li-B Alloy and Study of Its Microstructure and Discharge Characteristics

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Journal of Materials Science & Technology 2000年第6期16卷 581-584页

作者： Zhijian LIU, Zhiyou LI, Wei DUAN, Xuanhui QU, Baiyun HUANG and Siqi ZHANG (state key {2. for Powder {3.lurgy , Central-South university of Technology, Changsha 410083. China) [Manuscript received November 2. 1999] state key Lab. for Powder {2.l. Central South Univ. of Technol. Changsha 410083 China

A Li-B alloy has been prepared using a pretreated amorphous B powder and pure Li ingot as starting materials by continually slow addition of B powder and intensified stirring in the process of melting. The microstructure and the discharge characteristic of the materials have been investigated- Results show that the problem of temperature control in synthesis would be modified by means of continual addition of B powder, the Li7B6 would be more finely distributed in the metal Li by means of intensified stirring. The discharge characteristic of the Li-B alloy using amorphous B as starting materials is almost the same with that of using crystalline B.

关键词： Li Preparation of Li-B Alloy and Study of Its Microstructure and Discharge Characteristics

Potential of Industrial Byproducts in Ameliorating Acidity and Aluminum Toxicity of Soils Under Tea Plantation

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Pedosphere 2010年第5期20卷 645-654页

作者： LI Jiu-Yu WANG Ning XU Ren-Kou D. TIWARI state key {2. of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China) Department of Chemistry Mizoram University Tanhril Campus Aizawl 796009 (India) Graduate university of the Chinese Academy of Sciences Beijing 100049 (China)

It is imperative to choose some low cost, available and effective ameliorants to correct soil acidity in southern China for sustainable agriculture. The present investigation dealt with the possible role of industrial byproducts, i.e., coal fly ash （CFA）, alkaline slag （AS）, red mud （RM） and phosphogypsum （PG） in correcting acidity and aluminum （Al） toxicity of soils under tea plantation using an indoor incubation experiment. Results indicated that CFA, AS and RM increased soil pH, while PG decreased the pHs of an Ultisol and an Alfisol. The increment of soil pH followed the order of RM 〉 AS 〉 CFA. All the industrial byproducts invariably decreased exchangeable Al and hence increased exchangeable Ca, Mg, K and Na and effective cation exchange capacity. RM, AS and lime decreased total soluble Al, exchangeable Al and organically bound Al. Formation and retention of hydroxyl-Al polymers were the principal mechanism through which Al phytotoxicity was alleviated by application of these amendments. In addition, the heavy metal contents in the four industrial byproducts constituted a limited environmental hazard in a short time at the rates normally used in agriculture. Therefore, the short-term use of the byproducts, especially AS and RM, as amendments for soil acidity and AI toxicity in acid soils may be a potential alternative to the traditional use of mined gypsum and lime.

关键词： acid soil alkaline slag amelioration coal fly ash red mud

Macrocyclic Polyselena[n]ferrocenophane:Synthesis and Study as Multisignalling Sensors for Soft Cations

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Macrocyclic Polyselena[n]ferrocenophane:Synthesis and Study ...

STRAIN　INDUCED　STRUCTURAL　TRANSITION　OF　INTERFACES　AND　TWINS　IN　A　HOT－DEFORMED　DUAL－PHASE　TIAL　ALLOY

中国化学会第六届全国结构化学学术会议

作者： Wei Ji~1,Xin Zhang~1,Fei Xiao~1,Su Jing~(1,2.*) 1.School of Science,nanjing university of Technology,nanjing 2.0009, 2.state key laboratory of Coordination Chemistry,nanjing university,nanjing 2.0008

＜正＞The development of multisignalling chemosensors is one of the most challenging fields in recent years. Polyselena[n]ferrocenophanes are expected to have a rich chemistry,especially with late transition metals, and may work as highly sensitive sensors for these soft metal *** this goal in mind,we have synthesized and studied of several novel polyselena[n]ferrocenophanes with fluorescent unit,there exists

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来源： cnki会议评论

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cnki会议

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Acta metallurgica Sinica(English Letters) 1995年第Z1期8卷 273-286页

作者： CHEN GuoFiang WANG Jinguo ZHANG Lichun and YE Hengqiang(state key {2. for Advanced {3.s and Materials, university of Science and Technology Beijing, Beijing, 100083. P. R. China {2. of Atomic Imaging of Solids, Institute of {3. Researc Beijing Univ of Science and Technology Beijing China

The structure characteristics of a2.γinterfaces and the features of deformation twins in a quasi-isothermal forged Ti-45Al-10Nb alloy were studied by highresolution transmission electron microscopy. Three types of strain induced a2.γinterfaces and two types of strain induced twin boundaries were identified The most,important features are high density of ledges and the existence of I/3.111] Frank partial dislocation. Mechanisms for the formation these interfaces were proposed Two types of deformation twins were observed These deformation twins always start from the ledges it seems that ledges at interfaces are important features of interfacial structure for the mechanical behavior of alloys.

关键词： strain induced structural transition interfacial structure,deformation twins intermetallic TiAl alloy HREM

CORROSION MONITORING OF LY12.IN SODIUM CHLORIDE SOLUTION WITH ELECTROCHEMICAL NOISE TECHNIQUE

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Acta metallurgica Sinica(English Letters) 2001年第2期14卷 91-96页

作者： J.Q. Zhang, Z. Zhang, J.M. Wang, H.B. Shao and C.N. Cao (Department of Chemistry, Zhejiang university , Hangzhou 3.002., China) (state {2. laboratory for Corrosion and Protection of metals, Institute of metal research, The Chinese Academy of Sciences, She Dept. of Chem. Zhejiang Univ. Hangzhou 310027 China

Spontaneous electrochemical noise (EN) can be a rich source of information concerning the processes simultaneously occurring on a corroding interface. But the noise signal is often difficult to be analyzed due to the complicated nature of the specific systems being investigated. In this paper, the potential noise fluctuations during the free corrosion of commercial aluminum alloy LY12.in sodium chloride solution was recorded and analyzed with different techniques. The typical results showed that the fractal dimension (D,n) obtained from spectral power density (SPD) is mainly directly proportional to the intensity of pitting corrosion and to the value of pitting parameter (SE) derived from dimensional analysis, while the fractal dimension (DE) obtained from EIS is mainly related to the uniform corrosion.

关键词： electrochemical noise fractal stochastic analysis dimensionanalysis localized corrosion

X-ray Diffraction Line Profile Broadening of Fe_(50)Pd_(50) Alloy Ultrafine Particles

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Journal of Materials Science & Technology 1995年第6期11卷 435-439页

作者： Jian CHEN Wenduo WEI Mingchuan YANG Xiukui SUN Wenxiu CHEN and Zhuangqi HU (state key Lab. of RSA, Institute of {2. {3., Chinese Academy Sciences, Shenyang, 110015, China) Inst of metal research Chinese Acad Sciences Shenyang China

The composition distribution in Fe50Pd50 alloy ultrafine particles prepared by inert gas condensation method was investigated in details by means of X-ray diffraction technique through deconvolution of the X-ray diffraction data. The microscopic composition distribution in the alloy UFP was identified, which is caused by nonuniformity of the melt, fractional distillation during the evaporation process and statistical fluctuation during nucleation and coalescence of the alloy particles. The composition distribution affects the properties of the alloy UFP

关键词： Pd X-ray Diffraction Line Profile Broadening of Fe Alloy Ultrafine Particles

Studies　on　the　Binding　of　Tris(1,10-phenanthroline)　Nickel(Ⅱ)　to　Calf　Thymus　DNA

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Chemical research in Chinese Universities 1997年第3期13卷 201-206页

作者： JIN Lan , YANG Pin . . and LI Qing-shan (state key {2. of Coordination Chemistry,{3. , Nnjing 2. 0093.) YANG Bin-sheng (Institute of Molecular Science , Shanxi university , Taiyuan , 03.006 )

Absorbance and fluorescence methods were used to study the interaction of - and A-tris (phenanthroline) nickel ( Ⅱ) complex with calf thymus DNA. It was con- cluded that -Ni(phen). preferentially bound to DNA. Especially the fluorescence Scatchard plots were discussed for the binding of EthBr to calf thymus DNA in the presence of varying concentrations of the metal complex. Theses studies indicated that both the isomers bound to DNA by two acting types , namely , intercalative and electrostatic bound modes.

关键词： Chiral metal complexe DNA . Binding mode

Bioreducible unimolecular micelles based on amphiphilic multiarm hyperbranched copolymers for triggered drug release

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Science China Chemistry 2010年第12期53卷 2497-2508页

作者： PANG Yan 1,LIU JinYao 1,SU Yue 1,ZHU BangShang 2.HUANG Wei 1,ZHOU YongFeng 1,ZHU XinYuan 1,2.& YAN DeYue 1 1 School of Chemistry and Chemical Engineering,state {3. {2. of metal Matrix Composites,Shanghai Jiao Tong university,Shanghai 2.02.0,China 2.Instrumental Analysis Center,Shanghai Jiao Tong university,Shanghai 2.02.0,China 1. School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai 200240 China2. Instrumental Analysis Center Shanghai Jiao Tong University Shanghai 200240 China

A novel type of bioreducible amphiphilic multiarm hyperbranched copolymer (H40-star-PLA-SS-PEG) based on Boltorn H40 core,poly(L-lactide) (PLA) inner-shell,and poly(ethylene glycol) (PEG) outer-shell with disulfide-linkages between the hydrophobic and hydrophilic moieties was developed as unimolecular micelles for controlled drug release triggered by *** obtained H40-star-PLA-SS-PEG was characterized in detail by nuclear magnetic resonance (NMR),Fourier transform infrared (FTIR),gel permeation chromatography (GPC),differential scanning calorimeter (DSC),and thermal gravimetric analysis (TGA).Transmission electron microscopy (TEM) and dynamic light scattering (DLS) analyses suggested that H40-star-PLA-SS-PEG formed stable unimolecular micelles in aqueous solution with an average diameter of 19 ***,these micelles aggregated into large particles rapidly in response to 10 mM dithiothreitol (DTT),most likely due to shedding of the hydrophilic PEG outer-shell through reductive cleavage of the disulfide *** a hydrophobic anticancer model drug,doxorubicin (DOX) was encapsulated into these reductive unimolecular *** vitro release studies revealed that under the reduction-stimulus,the detachment of PEG outer-shell in DOX-loaded micelles resulted in a rapid drug *** cytometry and confocal laser scanning microscopy (CLSM) measurements indicated that these DOX-loaded micelles were easily internalized by living *** tetrazolium (MTT) assay demonstrated a markedly enhanced drug efficacy of DOX-loaded H40-star-PLA-SS-PEG micelles as compared to free *** of these results show that these bioreducible unimolecular micelles are promising carriers for the triggered intracellular delivery of hydrophobic anticancer drugs.

关键词： hyperbranched polymer unimolecular micelle drug delivery

ADSORPTION OF PHENOL AND Pb2. FROM AQUEOUS SOLUTIONS BY A NEW DI-FUNCTION ADSORBENT WITH SULFHYDRYL GROUPS

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Chinese Journal of Reactive Polymers 2007年第Z1期 46-54页

作者： WANG Jinnan1,2.LI Aimin1,2.ZHANG Bo1,2.ZHANG Quanxing1,2.1. state key {2. of Pollution Control and Resources Reuse, School of the Environment, nanjing university, nanjing 2.0093. China. 2. research Center for Engineering Technology of Organic Pollutants Control and Resources Reuse of Jiangsu Province, nanjing 2.003., China.

A new di-function adsorbent (JN-3. was prepared by sulfhydryl modified. Comparing with Amberlite XAD-4 and NDA-150, the equilibrium adsorption for phenol on the JN-3.from aqueous solutions was tested, perfect adsorption capacity was shown. Pb2. can be also removed by JN-3.because of the chelate interaction between sulfhydryl groups and metal ions. This adsorbent could be used in removal of combine pollutants such as phenolic compounds and heavy metal ions from waste streams.

关键词： Sulfhydryl Di-function resin Phenol Pb2. Adsorption.