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| 1 | EFFECT OF PRECIPITANT ON THE PROPERTIES OF ULTRAFINE YTTRIA POWDER PRODUCED BY PRE CIPITATION METHOD显示文摘Using yttriu m nitrate as the m other salt , synthesis of ultrafine yttria po w der through w et che mical route w as investigated . Choice of precipitant has dra m atic effects on co m position ,particle size distribution and particle m orphology of the precipitates . When a m m onia solutionw as used as the precipitant , the precursor precipitate w as m ainly Y2( O H) 5 14( N O3) 0 86· H2 O with co m paratively large particle size , broad size distribution and co m plex particleshapes . When sodiu m hydroxide solution w as used , roughly spherical α Y( O H)3·3 H2 Opre cipitate w ith sm all particle size and narro w size distribution w as obtained . The transfor m a tion sequence of dry α Y( O H)3 ·3 H2 O gel during calcination w as determ ined to be α Y( O H) 3·3 H2 O→ Y O O H→ Y2 O3 . After calcining at 600 ℃ for 1 hour , both Y2( O H) 5 14( N O3) 0 86· H2 O and α Y( O H) 3·3 H2 O transfor m to well crystallized Y2 O3 pow ders ,w ith particle sizes of 50 ~3000 n m and 20 n m , respectively . | Y. Q. Jia1) , J. G. Li1) , Y. M. Wang2) , L. X. Ding2) , X. M . Qin1) and X. D. Sun1)1) School of Materials and Metallurgy , Northeastern University , Shenyang 110006 , China2) Department of Materials , School of Mechanical Engineering , She | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 7 |
| 2 | N_2O emissions from agricultural soils in the North China Plain: the effect of chemical nitrogen fertilizer and organic manure显示文摘An enclosed chamber technique was used to measure N 2O emissions from intensively agricultural soils of the North China Plain during the periods of 1995—1996 and 1997—1998, to reflect distinct components of winter wheat and summer maize growing seasons. The results showed that the continuous application of fertilizer in agricultural soils increased N\-2O emissions by a factor of 24.1—28.1, the calculated annual chemical N fertilizer\|transformed N\-2O\|N emissions was 0.67%. Our results indicated that the application of organic manure also had a significant influence on soil N 2O emissions, which combined with the use of chemical N increased about 20% in a year. It was calculated that there were about 0.11% N of organic manure transformed as N 2O N. Annual mean N 2O emission from our study area of fertilized soils was estimated to be 57.1 μgN 2O/(m 2·h). A weak correlation was also found between N 2O emissions and soil available nitrogen content NH + 4. | DONG Yun\|she 1,2,3 , Dieter Scharffe 2, Manfred Domroes 3, QI Yu chun 1, ZHANG Shen 1 (1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China E\|mail: dongys@dls.iog.ac.cn 2. M | 2000 | Journal of Environmental Sciences2000，12，4： | 6 |
| 3 | Delay-Dependent Robust Stabilization Criteria for Uncertain Neutral Systems with Mixed Delays显示文摘 | He Y Wu M She J H | 2004 | Systems and Control Letters2004，51，3： | 1 |
| 4 | Humidity sensitive properties of crosslinked and quaternized poly ( 4-vinylpyridine-eo-butyl methacrylate)显示文摘 | Li Y Yang M J She Y | 2005 | Sensors and Actuators B2005，107，： | 1 |
| 5 | Delay-dependent robust stability criteria for uncertain neutral systems with mixed delays 显示文摘 | He Y Wu M She J H | 2004 | Systems and Control Letters2004，51，1： | 1 |
| 6 | Free fatty acids produce insulin re- sistance and activate the proinflammatory nuclear factor-p pathway in the rat liver显示文摘 | Boden G She P Mozzoli M | 2005 | Diabetes2005，54，12： | 1 |
| 7 | Selective catalytic reduction of NO with methane over alumina catalysts显示文摘 | Keshavaraja A She X Stephanopoulos M F | 2000 | Appl Catal B: Era Jr2000，27，1： | 1 |
| 8 | Delay-dependent stabilization of linear systems with time-varying state and input delays显示文摘 | Zhang X M Wu M She J H | 2005 | Automatica2005，41，8： | 1 |
| 9 | Resistance of leukemic stem -like cells in AML cell line KG1 a to natural killer cell - mediatedcytotoxicity 显示文摘 | SHE M NIU X CHEN X | 2012 | Cancer Lett2012，318，2： | 1 |
| 10 | New delay-dependent stability criteria and stability method for neutral systems显示文摘 | Wu M He Y She J H | 2004 | IEEE Transaction on Automatic Control2004，49，12： | 1 |
| 11 | Delay-dependent stabilization of linear systems with time-varying state and input delays 显示文摘 | X M Zhang M Wu J H She Y He | 2005 | Automatica (S0005-1098)2005，41，8： | 1 |
| 12 | Delay-dependent stabilization of linear systems with time-varying state and input delays显示文摘 | Zhang X M Wu M She J H | 2005 | Automatica2005，41，8： | 1 |
| 13 | Structures andorientations of cobalt phthalocyanine adsorbed on Sb(111)显示文摘 | She L M Yu Y H Wu P | 2012 | J Chem Phys2012，136，14： | 1 |
| 14 | Polybrominateddiphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) in breast milk from the Pacific Northwest 显示文摘 | She J Holden A Sharp M | 2007 | Chemosphere2007，67，9： | 1 |
| 15 | Cell-free Formation of RNA Granules: Low Complexity Sequence Domains Form Dynamic Fibers within Hydrogels显示文摘 | Masato Kato Tina W. Han Shanhai Xie Kevin Shi Xinlin Du Leeju C. Wu Hamid Mirzaei Elizabeth J. Goldsmith Jamie Longgood Jimin Pei Nick V. Grishin Douglas E. Frantz Jay W. Schneider She Chen Lin Li Michael R. Sawaya David Eisenberg Robert Tycko Steven L. M | 2012 | Cell2012，，： | 1 |
| 16 | Identification of the hydrophobic glycoproteins of Caenorhabditis elegans显示文摘 | Fan X She Y M Bagshaw R D | 2005 | Glycobiology2005，15，10： | 1 |
| 17 | Identification of side population cells from bladder cancer cells by dyecycle violet staining 显示文摘 | SHE J J ZZHANG P G WANG Z M | 2008 | Cancer Biol Ther2008，7，10： | 1 |
| 18 | Interferometric measurements of nonlinear refractive-index coefficient relative to CS2 in laser-system-related material 显示文摘 | Moran M J She C Y Carman R L | 1975 | IEEE J Quantum Electron1975，11，6： | 1 |
| 19 | Delay-dependent criteria for robust stability of time-varying delay systems显示文摘 | WU M HE Y SHE J H | 2004 | Automatica2004，40，8： | 1 |
| 20 | Single eventtransient suppressor for flip-flops 显示文摘 | SHE X X LI N CARLSON R M | 2010 | IEEE Trans Nucl Sci2010，57，4： | 1 |
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