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Study on growth and properties of novel γ-LiAlO_2 substrate

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Science china(Technological sciences) 2006年第2期49卷 188-193页

作者： ZOU Jun1,2, ZHOU Shengming1, XU Jun1 & ZHANG Rong3 1. Shanghai institute of Optics and Fine Mechanics, c.inese ac.demy of sciences, Shanghai 201800, china 2. Graduate School of c.inese ac.demy of sciences, Beijing 100039, china 3. Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, china 1. Shanghai institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China 2. Graduate School of c.inese ac.demy of sciences Beijing 100039 China 3. Laboratory of Solid State Microstructures and Department of Physics Nanjing University Nanjing 210093 China

Transparent γ-LiAlO2 single crystal has been grown by Temperature Gradient technique. The surface of the wafer annealed in O2-atmosphere at 1100°c for 70 h became opaque and Li-poor phase (LiAl5.8); while, that annealed in Li-rich atmosphere kept transparent and smooth. The full-width at half maximum value dropped to 30 arcsecs when the wafer was annealed in Li-rich atmosphere. That annealed in O2-atmosphere increased to 78 arcsec. compared with absorption spectra, we can conclude that the 196 nm absorption peak was caused by Li vacancies and the 736 nm peak was caused by O vacancies.

关键词： γ-LiAlO2 crystal, scanning electron micrograph (SEM), absorption spectra.

crystal Structure of 〔Pdcl_4〕·〔c_4H_(10)NO〕_2 compound

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c.inese Journal of Structural chemistry 1997年第3期16卷 191-194页

作者： WU Ling YAO Yuan-Gen HUANG Xiao-Ying(Fujian institute of Research on the Structure of Matter,the c.inese ac.demy of sciences, Fuzhou, 35.002 china) Fujian Inst. Res. Struct. of Matter Chinese Academy of Sciences Fuzhou 350002 China

The crystal structure of the title compound was determined, Mr =424. 47, orthorhombic, Pbca, a= 20. 780(5., b= 8. 601 (3), c= 8. 285.3) A, V=1480. 8(5. A, Z=4, Dc= 1. 904 g/cm3, μ(MoKa) = 19. 5. cm-1, F(000)=*** final R =0. 038, Rw=0.063 for 15.4 independent observed reflections (I> 3σ(I) ). The crystal contains an isolated [Pdcl4]2- planar tetragon and two morpholiniumcations which are linked to the anion ed N -H...cl hydrogen bonds with donor-acceptor distances of 3. 394 and 3. 399 A, respectively.

关键词： crystal structure Pd compound morpholinium

Organic Matter Enrichment and Aggregate Stabilization in a Severely Degraded Ultisol After Reforestation

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Pedosphere 2006年第6期16卷 699-706页

作者： ZHANG Bin PENG Xin-Hua institute of Soil Science Chinese Academy of Sciences Nanjing 210008China

Three types of soils： an eroded barren soil under continuous fallow, an eroded soil transplanted with Lespedeza shrubs （Lespedeza bieolor）, and an eroded soil transplanted with camphor tree （cinnaraomum camphora） were investigated to quantify organic matter pools and aggregates in reforested soils using physical fractionation techniques and to determine aggregate stability in relation to the enrichment of soil organic carbon （SOc）. Soil organic matter （SOM） was physically fractionalized into free particulate organic matter （fPOM）, occluded particulate organic matter （oPOM）, and mineralassociated organic matter （mOM）. The SOM was concentrated on the surface soil （0 5.cm）, with an average c sequestration rate of 20-25.g c m^-2 year^-1 over 14 years. As compared to the eroded barren land, organic c content of fPOM, oPOM, and mOM fractions of the soil under Lespedeza and under camphor tree increased 12-15. 45.5., and 3.1-3.5.times, respectively. A linear relationship was found between aggregate stability and organic c （r^2 = 0.45. P 〈 0.01）, oPOM （r^2 = 0.34, P 〈 0.05., and roOM （r^2 = 0.46, P 〈 0.01） of aggregates. The enrichment of organic c improved aggregate stability of the soil under Lespedeza but not that under camphor tree. However, further research is needed on the physical and biological processes involved in the interaction of soil aggregation and SOc sequestration in ecosystem.

关键词： aggregate stability reforestation organic matter fractions soil c sequestration

Influences of low-Ti substitution for La and Mg on the electrochemical and kinetic characteristics of AB_3-type hydrogen storage alloy electrodes

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Science china(Technological sciences) 2010年第1期53卷 242-247页

作者： DONG ZhenWei1,2,WU YaoMing1,MA LiQun2,SHEN XiaoDong2 & WANG LiMin1 1 State Key Laboratory of Rare Earth Resource Utilization,changchun institute of Applied chemistry,c.inese ac.demy of sciences,c hangchun 130022,china 2 college of Material Science and Engineering,Nanjing University of Technology,Nanjing 210009,china 1. State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China2. College of Material Science and Engineering Nanjing University of Technology Nanjing 210009 China

The(La0.67Mg0.33)1-xTixNi2.75.o0.25.x = 0,0.05.0.10,0.15.and 0.20,at%) alloys were synthesized by arc melting and subsequent heat solid-liquid diffusing *** structure,electrochemical properties and kinetic characteristics of the alloys were investigated *** results showed that all the alloys mainly consisted of the(La,Mg)Ni3,LaNi5.phases,and the lattice parameters and the cell volumes of the(La,Mg)Ni3 and LaNi5.phases decreased with increasing Ti *** alloy electrodes could be activated to reach their maximum discharge capacity within five *** cycle life after 100 charge/discharge cycles(c100/cmax) and the high-rate dischargeability at a discharge current density of 1200 mA/g first increased and then *** the results showed that low-Ti content in AB3-type hydrogen storage alloys was beneficial to improvements of the overall electrochemical properties,and the optimum overall electrochemical performance of the alloy electrodes was obtained when x = 0.05.

关键词： AB3-type alloy metal hydride electrode microstructure electrochemical property kinetic characteristic

Sediment retention by check dams in the Hekouzhen-Longmen Section of the Yellow River

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International Journal of Sediment Research 2008年第2期23卷 159-166页

作者： Da-chuan RAN1,2,Quan-Hua LUO3,Zu-Hao ZHOU4,Guo-Qing WANG5.and Xiao-Hua ZHANG2 1 Senior Engineer,Xi’an University of Technology,Xi’an 710048,china 2 Senior Engineer,Yellow River institute of Hydraulic Research,Zhengzhou 45.003,china 3 Engineer ,Xifeng Soil and Water conservation Experimental Station,Qingyang 745.00,china 4 Senior Engineer,china institute of Water Resources and Hydropower Research,Beijing 100038,china 5.Senior Engineer,Flood prevention office of YRcc,Zhengzhou 45.003,china [a]Senior Engineer Xi'an University of Technology Xi'an 710048 china [b]Senior Engineer Yellow River institute of Hydraulic Research Zhengzhou 45.003 china [c]Engineer Xifeng Soil and Water conservation Experimental Station Qingyang 745.00 china [d]Senior Engineer china institute of Water Resources and Hydropower Research Beijing 100038 china [e]Senior Engineer Flood prevention office of YRcc Zhengzhou 45.003 china

coarse sediment retention by check dams is analyzed for five typical catchments in the Hekou-Longmen section of the midstream of the Yellow River,which is an area of high coarse sediment *** catchments are the Huangfuchuan,Kuye,Wuding,Sanchuan and Qiushui River *** amount of coarse sediment retained by check dams in these areas for different periods was *** reduction due to check dams is compared with other soil conservation measures and the results show that check dams are the most effective to rapidly reduce the amount of coarse sediment entering the Yellow *** the average percentage of the drainage area with check dams for the five typical catchments reaches 3.0%,the average sediment reduction ratio can reach 60%.Therefore,to rapidly and effectively reduce the amount of sediment,especially coarse sediment,entering the Yellow River,the area percentage of check dams in the Hekou-Longmen section should be kept around 3%.The Kuye and Huangfuchuan River Basins are the preferred main catchments in which such water conservation measures are implemented.

关键词： Sediment retention Yellow River check dam coarse sediment Grain size

Adjuvant therapy for hormone receptor-positive breast cancer: Perspective from a survey on breast cancer physicians' acceptance of practice-changing data

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c.inese Journal of cancer Research 2023年第2期35卷 191-196页

作者： Asian institute of clinical Oncology(AIcO)Expert Panel Louis W.c.chow 不详 Organisation for Oncology and Translational Research Unit 160416/FStrand 5050 Bonham StrandSheung WanHong Kong SARChina

A cross-sectional online survey was conducted.A high proportion of the c.inese breast cancer(Bc)physician respondents(n=77)would prescribe extended adjuvant endocrine therapy(AET)with aromatase inhibitors(AI)beyond 5.years for postmenopausal females with Bc,especially those with higher *** with≥15.years of clinical experience were more likely to prescribe a longer duration of AET for low-risk *** of the respondents considered intermittent letrozole as an acceptable *** respondents would prescribe adjuvant chemotherapy to genomic high-intermediate risk[Oncotype DX recurrence score(RS)21-25.females aged≤5. years regardless of the clinical risk classification.

关键词： Breast neoplasms surveys and questionnaires chemotherapy adjuvant practice patterns physicians

The pathway and fate of the heavy metal mixture in Xiamen marine experiment enclosures

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acta Oceanologica Sinica 1990年第3期9卷 389-403页

作者： Li Jinxia, Du Ronggui, Zhang Gongxun , c. S. Wong, R. W. Macdonald2 and W. K. Johnson2 Third institute of Oceanography, State Oceanic Administration, Xiamen , china institute of Ocean sciences, P. O. Box 6000, Sidney, B. c. V8L 4B2, canada

The pathway and fate of heavy metals were studied in 10m3 enclosures at Xiamen Bay in 1985. The dissolved metals added are removed rather quickly during the first days, and their half-removal times ( t1/2) (d) are as follows: Pb 5. 4-5. 8, Hg 6. 7-14, Zn 11-22, cu 16 - 29, and cd 30-89. Zinc is transferred biologically to particles during phytoplankton bloom. The main Fate of added metals after 27 days is as follows; over 80% cd and 60% cu remain in dissolved phase, more than 60% Pb and 5.% Hg transfer to settling settlement, while Zn is equally distributed in dissolved phase and settling settlement. The wall uptake is less than 2% of the total metals added. Organic materials play an essential role in the partition and the transfer of heavy metals in water column. Terrigenous and autochthonous particles show different affinities to different metals. Most heavy metals associate weakly with zooplankton. The Binding of cd, Pb, Zn and cu to the particles shows distinctive features related to the diagenetic alteration.

关键词： The pathway and fate of the heavy metal mixture in Xiamen marine experiment enclosures

Formation of 4'-carboxyl acid metabolite of imrecoxib by rat liver microsomes

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acta Pharmacologica Sinica 2006年第4期27卷 506-512页

作者： Hai-yan XU~2 Peng ZHANG~2 Ai-shen GONG~3 Yu-ming SUN~2 Feng-ming cHU~4 Zong-ru GUO~4 Da-fang ZHONG~(2,5.6)2 Laboratory of Drug Metabolism and Pharmacokinetics,Shenyang Pharmaceutical University,Shenyang 110016,china 3 Research and Development center,Shanghai Hengrui Pharmaceutical co,Shanghai 200245.china:4 institute of Materia Medica,c.inese ac.demy of Medical {5. and Peking Union Medical college,Beijing 10005.,china 5.Shanghai institute of Materia Medica,c.inese ac.demy of {5.,Shanghai 201203,china LaboratoryofDrugMetabolismandPharmacokinetics ShenyangPharmaceuticalUniversityShenyang110016China

Aim:Imrecoxib is a novel and moderately selective cOX-2 *** aim ofthe present in vitro investigation was to study the formation of the major metabo-lite 4′-carboxylic acid imrecoxib（M2）and identify the enzyme（s）involved in ***:The formation of M2 was studied in rat liver cytosol in theabsence or presence of liver *** formed metabolite was identifiedand quantified by Lc/MS~*** addition,to characterize the cytochrome P45.（cYP）isozymes involved in M2 formation,the effects of typical cYP inhibitors（such asketoconazle,quinine,α-naphthoflavone,methylpyrazole,and cimetidine）on theformation rate of M2 were ***:The formation of M2 from 4’-hydroxymethyl imrecoxib（M4）was completely dependent on rat liver microsomesand *** kinetic studies demonstrated that the formation rate of M2conformed to monophasic Michaelis-Menten *** experimentsshowed that the formation of M2 was induced significantly by dexamethasoneand lowered by ketoconazole strongly and ***,other cYP inhibitors,such as α-naphthoflavone,cimetidine,quinine,and methylpyrazole had no inhibitory effects on this metabolic ***:These biotransformation studies of M4 and imrecoxib in rat liver atthe subcellular level showed that the formation of M2 occurs in rat liver microsomesand is *** reaction was mainly catalyzed by cYP 3A inuntreated rats and in dexamethasone-induced *** cYP,such as cYP 1A,2c,2D,and 2E,seem unlikely to participate in this metabolic pathway.

关键词： imrecoxib cytochrome P45. metabolism liver microsomes rats

Runoff reduction due to environmental changes in the Sanchuanhe river basin

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International Journal of Sediment Research 2008年第2期23卷 174-180页

Recently,runoff in many river basins in china has been ***,the role that climate change and human activities are playing in this decrease is currently of *** this study,we evaluated an assessment method that was designed to quantitatively separate the effects of climate change and human activities on runoff in river ***,we calibrated the SIMHYD rainfall runoff model using naturally recorded hydro-meteorologic data pertaining to the Sanchuanhe River basin and then determined the effects of climate change and human activities on runoff by comparing the estimated natural runoff that occurred during the period in which humans disturbed the basin to the runoff that occurred during the period prior to disturbance by *** results of this study revealed that the SIMHYD rainfall runoff model performs well for estimating monthly *** addition,we found that absolute runoff reductions have increased in response to human activities and climate change,with average reductions of 70.1% and 29.9% in total runoff being caused by human activities and climate change,*** together,the results of this study indicate that human activities are the primary cause of runoff reduction in the Sanchuanhe River basin.

关键词： Sanchuanhe River Hydrological simulation climate change Human activities Impact