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784篇 您的检索式:作者名="DouglasS"
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1OXIDATION OF A TWO-PHASE Cu-75Cr ALLOY IN AIRAT 700-900℃显示文摘The cormsion in air of a two-phase Cu-75Cr alloy was studied at 700-900℃. Thealloy cormded nearly parabolically at 700-800℃, but at 900℃ its instantaneousparabolic mte constant decreased with time. The scales were complex and consistedof an outermost layer of copper oxide generally followed bg a layer of the double ox-ide Cu2 Cr2 O4 sometimes containing particles of unoxidized chromium surmunded bya chromia layer. An innermost layer of chromia was also observed in some cases.Finally metallic copper was al8o frequently mixed with chromia particles. No Cr de-pletion was observed in the alloy close to the inteffoce with the scale. In any case,this alloy was not able to form an exclusive continuous protective chromia layer. Thespecial cormsion behavior Of this alloy is typical of two-phase binary systems with alange solubility gaP in which the outwaof dthesion fiux of the most-reactive componentin the alloy is strongly reduced and may be inswncient to fOrm a protective externallayer of the cormsponding oxide. In paTticular, the presence of particles of Cr withina double oxide layer is very unusual and is allowed only for the kinetic reason.F. Gesmundo Y Niu F. Vianiand D.L. Douglass(Universita di Genova, Fiera del Mare, Pad. D,16129 Genova, Italy)(State Key Lab. for Corrosion and Protection, Institute of Corrosion and Protection of Metals, theChinese Academy of Sciences, Shenyang 110015, Ch 1997Acta Metallurgica Sinica(English Letters)1997,10,4:21
2Development of cork oak (Quercus suber L.) seedlings in response to tree shelters and mulching in northwestern Tunisia显示文摘The need for reforestation in cork oak (Quercus suber L.) areas is challenged by difficulties. Principal among these is herbivory of young plants, vegetative competition, and slow growth rates of cork oak seedlings. We evaluated the early development of cork oak seedlings treated using tree shelters and mulching in northwestern Tunisia. We tested three tree shelter treatments (non-vented, vented, and control) to shield seedlings from animal damage and five mulch types to control competing vegetation (Italian Stone Pine, Lentisk, combination of Italian Stone Pine and Lentisk (organic mulches), gravel (inorganic mulch) and no mulch). At the end of the two-year experiment, sheltered seedlings were 89-99% taller than unshelteredseedlings and had higher numbers and lengths of shoot growth flushes. In contrast, both stem diameter growth and dry weight biomass (from samples extracted after two years) were significantly reduced inside tree shelters. Root-to-shoot ratio was not significantly different in sheltered vs. unsheltered seedlings, suggesting that tree shelters do not adversely affect this parameter. Mulching alone did not favour growth, but could be beneficial when combined with tree shelters. The combination of vented tree shelters and gravel mulch was the most effective treatment for promoting diameter, height and stem volume growth.Taher Mechergui Marta Pardos Naceur Boussaidi Brahim Hasnaoui Douglass F. Jacobs 2013Journal of Forestry Research2013,24,2:5
3Influence of lanthanum level and interactions with nitrogen source on early development of Juglans nigra显示文摘稀土元素元素在中国农业被用于 30 年改进生长和产量。众多的科学研究在生理学,矿物质营养,和生长显示出改进,尽管有害效果可以也发生。很少的研究在木质的种类上被执行了。我们指数地使肥沃一个年旧黑核桃(Juglans nigra L.) 有 0, 0.1, 1, 10,或 100 mg 镧(La ) 和 800 mg 氮(N) 的幼苗作为 NaNO3,(NH4 ) 2SO4, NH4NO3,或没有 N。一月追随者期末考试授精,生长,矿物质营养,光合作用,叶绿素,和硝酸盐 reductase 活动被估计。植物与 La 的高水平使肥沃减少了好根生长,镁的集中,钙,镍,和磷,光合作用层次,和叶绿素一个内容。叶的 La 集中显示出相互作用效果,与乘在在到给 10 mg La 为的那些的 100 mg La 喂的植物的更大的集中的三~四(NH4 ) 2SO4 和 NH4NO3 处理。在层次的 La 增加的建议不有益的效果在在 N 之间的这研究和相互作用使用了的结果采购原料, La 层次没在黑核桃幼苗的生长,矿物质营养,或生理学上有重要影响。Nicodemus Michael A Salifu K Francis Jacobs Douglass F 2009Journal of Rare Earths2009,27,2:4
4The transition from the formation of mixed scales to the selective oxidation of the most-reactive component in the corrosion of single and two-phase binary alloys显示文摘F. Gesmundo F. Viani Y. Niu D. L. Douglass 1993Oxidation of Metals (-)1993,,3:2
5Application of high-resolution DNA melting for genotyping and variant scanning of diploid and autotetraploid potato显示文摘David De Koeyer Katheryn Douglass Agnes Murphy Sean Whitney Lana Nolan Yong Song Walter De Jong 2010Molecular Breeding2010,,1:2
6Quality of Gastric Ulcer Healing: A New, Emerging Concept显示文摘Andrzej Tarnawski Jerzy Stachura William J. Krause Thomas G. Douglass Hella Gergely 1991Journal of Clinical Gastroenterology1991,,:2
7PAX-2 is a DNA-binding protein expressed in embryonic kidney and Wilms tumor显示文摘Dressler GR Douglass EC 1992PNAS1992,89,:1
8A Regional Network Strategy for Reciprocal-urban Linkages 显示文摘Douglass 1998Third World Planning Review1998,,1:1
9Gastric cancer:overview of current therapies显示文摘DOUGLASS HO 1985Semin Oncol1985,12,:1
10显示文摘KATHRYN L KELLAR J DOUGLASS P 2003Journal of Immunological Methods2003,279,:1
11Characterization of the human cDNA and ge-nomic DNA encoding CART:a cocaine-and amphetamine-regulated tran-script显示文摘DOUGLASS J DAOUD S 1996Gene1996,169,2:1
12Gastric cancer: D2 dissection or low Maruyama Iudex-based surgery-a debate显示文摘Douglass HO Jr Hundahl SA Macdonald JS 2007Surg Oncol Clin N Am2007,16,:1
13The role of hexaminolevulinate fluores- cence cystoscopy in bladder cancer显示文摘WITJES J A DOUGLASS J 2007Nat Clin Pract Urol2007,4,10:1
14High-temperature sulfidation behavior of Ni-Nb alloys 显示文摘CHEN M F DOUGLASS D L GESMUNDO F 1989Oxidation of Metal1989,31,34:1
15Pak-1 expression increases with progression of colorectal carcinomas to metastasis显示文摘Carter JH Douglass LE Deddens JA 2004Clin Cancer Res2004,10,10:1
16Noise enhancement of the information transfer in cray fish mechano receptors by stochastic resonance 显示文摘DOUGLASS J K WILKEN S L PANTAZELOU E 1993Nature1993,365,6444:1
17High temperature corrosion in energy systems显示文摘RAPPR A DEVAN J H DOUGLASS D L 1981Mater Sci Eng1981,50,:1
18Characterization of the eDNA and genomicDNA encoding CART:a cocaine-and amphetamine-regulated transcript显示文摘Douglass J Daoud S 1996Gene1996,169,2:1
19Wire core and coronal plasma expansion in wire-array Z pinches with small numbers Of wire显示文摘Shelkovenko T A Pikuz S A Douglass J D 2007Phys Plasmas2007,14,10:1
20From Global Interclty Competition to Co- operation for Livable Cities and Economic Resilience in Pacific Asia显示文摘Mike Douglass 2002Environment and Urbanization2002,14,1:1
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