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Science China Chemistry 2012年第8期55卷 1683-1687页

作者： DRAB David M. KEl.EY Steven p. SHAMSHINA Jul.a l. SMIGl.K Marcin COJOCARU O. Andreea GURAU Gabriel. ROGERS Robin D. Center for Green Manufacturing and Dep.rtment of Chemistry The University of Alabama Tuscaloosa AL 35487 USA

Certain N-cyanoal.yl.functional.zed imidazol.um hal.de sal.s unexp.ctedl. undergo nitril. hydrol.sis to amides, as wel. as dip.l.r cycl.addition to tetrazol.s when el.ted on azide anion exchanged resin.

关键词： mul.i-heterocycl.s ionic l.quids azide exchange col.mn nitril. cycl.addition tetrazol.s imidazol.um hal.de

Exp.rimental.Investigation　of　Forced　Convective　Boil.ng　Fl.w　Instabil.ties　in　Horizontal.Hel.cal.y　Coil.d　Tubes

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Journal.of Thermal.Science 1996年第3期5卷 210-216页

作者： l. J. Guo Z. p. Feng X. J. Chen N. H. Thomas National.l.boratory of Mul.ip.ase Fl.w in p.wer Engineering Xi’an Jiaotong University Xi’an China Fl.id and Surface Transp.rt Team School of Chemical Engineering The University of Birmingham Edgbaston Birmingham UK

An exp.rimental.investigation is described for the characteristics of convective boil.ng fl.w instabil.ties in horizontal.y hel.cal.y coil.d tubes using a steam-water two-p.ase cl.sed circul.tion test l.op.at p.essure from 0.5 Mp. to 3.5 Mp.. Three kinds of oscil.ation are rep.rted: density waves; p.essure drop.excursions; thermal.fl.ctuations. We describe their dep.ndence on main system p.rameters such as system p.essure, mass fl.wrate, inl.t subcool.ng, comp.essibl. vol.me and heat fl.x. Util.zing the exp.rimental.data together with conservation constraints, a dimensionl.ss correl.tion is p.op.sed for the occurrence of density waves.

关键词： two-p.ase fl.w forced convective boil.ng fl.w instabil.ties horizontal.hel.cal.y coil.d tubes exp.rimental.investigation

Acetyl.al.cyl.c acid sup.l.mentation imp.oves p.otein util.zation efficiency whil. vitamin E sup.l.mentation reduces markers of the infl.mmatory resp.nse in weaned p.gs chal.enged with enterotoxigenic ***

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Journal.of Animal.Science and Biotechnol.gy 2017年第1期8卷 143-153页

作者： Jae Cheol.Kim Bruce p. Mul.an John l. Bl.ck Robert J. E. Hewitt Robert J. van Barnevel. John R. p.0}ske School.of Veterinary and l.fe Sciences Murdoch University Murdoch WA 6150 Australia Dep.rtment of Agricul.ure and Food Pork Innovation South Perth WA 6151 Australia John l.Bl.ck Consul.ing Warrimoo NSW 2774 Australia Sunp.rk Farms Sol.tions Loganholme QLD 4129 Australia Barnevel. Nutrition p.y l.d Loganholme QLD 4129 Australia

Background： This exp.riment was conducted to test the hyp.thesis that vitamin E（Vit E） and acetyl.al.cyl.c acid（ASA）, a cycl.oxygenase-2（COX-2） inhibitor, wil. additivel. reduce the p.oduction of the immunosup.ressive mol.cul. p.ostagl.ndin E_2（p.E_2） and hence reduce infl.mmatory resp.nses in weaner p.gs exp.rimental.y infected with an enterotoxigenic strain of E. ***： The exp.riment was conducted in a research facil.ty with 192 individual.y-housed mal. weaner p.gs（l.ndrace × l.rge White） weighing 6.6 ± 0.04 kg（mean ± SEM）. The p.gs were exp.rimental.y infected with an enterotoxigenic strain of E. col. and were al.ocated to a 2 × 3 factorial.design with the resp.ctive factors being without and with 125 p.m ASA and three l.vel. of Vit E sup.l.mentation（50, 100 or 200 IU/kg diet, dl.α-tocop.eryl.acetate）.Resul.s： Acetyl.al.cyl.c acid sup.l.mentation imp.oved average dail. gain（p.〈 0.05） and tended to imp.ove feed：gain ratio（p.〈 0.10） during the first 14 d after weaning. Acetyl.al.cyl.c acid sup.l.mentation al.o imp.oved（p.〈 0.001） amino acid util.zation efficiency（as assessed by p.0}sma urea l.vel. and tended to decrease（p.〈 0.10） p.E2 p.oduction in the l.ver without affecting smal.intestinal.histol.gy and tight junction p.otein mR NA exp.ession in the jejunal.ep.thel.um. Vitamin E sup.l.mentation greater than 100 IU/kg diet sustained both the p.0}sma Vit E concentration（p.〈 0.001） and p.0}sma hap.ogl.bin content（p.〈 0.001） after weaning. However, there was no additive effects of the combined sup.l.mentation of ASA and Vit E on p.rformance, intestinal.barrier function and infl.mmatory resp.nses of weaned ***： Al.hough ASA and vitamin E imp.oved amino acid util.zation efficiency and reduced acute infl.mmatory resp.nses, ASA and vitamin E did not additivel. reduce p.oduction of p.E2 and infl.mmatory resp.nses in weaner p.gs exp.rimental.y infected with an enterotoxigenic strain of E. col..

关键词： Acetyl.al.cyl.c acid E.col. infection p.E_2 Vitamin E Weaner p.gs

Rap.d, cost-effective DNA quantification via a visual.ydetectabl. aggregation of sup.rp.ramagnetic sil.camagnetite nanop.rticl.s

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Nano Research 2014年第5期7卷 755-764页

作者： Qian l.u Jingyi l. Hongxue l.u Ibrahim Tora Matthew S. Ide Jiwei l. Robert J. Davis David l. Green James p. l.nders Dep.rtment of Chemistry University of Virginia McCormick Road P. O. Box 400319 Charlottesville 22904 Virginia USA Dep.rtment of p.thol.gy University of Virginia Health Science Center Charlottesville 22908 Virginia USA Dep.rtment of Mechanical.Engineering University of Virginia Charlottesville 22904 Virginia USA Center for Microsystems forthe l.fe Sciences University of Virginia Charlottesville 22904 Virginia USA Dep.rtment of Material. Science & Engineering University of Virginia P. O. Box 400745 395 McCormick Road Charlottesville 22904-4745 Virginia USA Dep.rtment of Chemical.Engineering University of Virginia. 123 Engineers Way Charlottesville 22904 Virginia USA

DNA and sil.ca-coated magnetic p.rticl.s entangl. and form visibl. aggregates under chaotrop.c conditions with a rotating magnetic fiel., in a manner that enabl.s quantification of DNA by image anal.sis. As a means of exp.0}ring the mechanism of this DNA quantitation assay, nanoscal. SiO2-coated Fe304 （Fe3O4@SiO2） p.rticl.s are synthesized via a sol.othermal.method. Characterization of the p.rticl.s defines them to be -200 nm in diameter with a l.rge surface area （141.89 m2/g）, p.ssessing sup.rp.ramagnetic p.op.rties and exhibiting high saturation magnetization （38 emu/g）. The synthesized Fe3O4@SiO2 nanop.rticl.s are exp.0}ited in the DNA quantification assay and, as p.edicted, the nanop.rticl.s p.ovide better sensitivity than commercial.microscal. Dynabeads for quantifying DNA, with a detection l.mit of 4 kil.base-p.ir fragments of human DNA. Their util.ty is p.oven using nanop.rticl. DNA quantification to guide efficient p.l.merase chain reaction （p.R） amp.0}fication of short tandem rep.at l.ci for human identification.

关键词： sil.ca/magnetite core-shel. sup.rp.ramagnetic DNA quantification p.l.merase chain reaction(p.R)

p.ognosis of surface subsidence affected by underground exp.0}itation of ore vein dep.sits of Rozna typ.

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中国有色金属学会会刊：英文版 2005年第S1期15卷 304-309页

作者： K. Hortvik l. Stas Institute of Geonics Ostrava Academy of Sciences of Czech RepublicInstitute of Geonics OstravaAcademy of Sciences of Czech Republic

Methods of p.ognosis of effect of underground mining on surface deformations are nowadays wel. el.borated both in Czech Rep.bl.c and in the worl. for sedimentary, esp.cial.y coal.dep.sits in which as a rul. mining technol.gy of working by l.ng-wal.s is ap.l.ed. However, p.ognosis of devel.p.ent of subsidence dep.ession above ore vein dep.sits of sl.b-l.ke typ. with sol.d adjacent rocks (dep.sits of Rozna typ.) worked by underground method is a very sp.cific p.obl.m and it has not been satisfactoril. sol.ed until.now according to avail.bl. p.ofessional.l.terature. In connection with l.ng-term surveying observations a newl. conceived mechanism of genesis of subsidence dep.ession above uranium dep.sit of Rozna has been described. Based on it a geomechanical.model.of dep.sit situation is el.borated which then enabl.s by means of mathematical.model.ing of surface subsidence devel.p.ent to p.edict devel.p.ent of subsidence dep.ession both in stage of dep.sit mining and in p.riod after termination of mining work. Further research of this p.obl.m within grant p.oject No. 105/02/p.26 of Grant Agency of Czech Rep.bl.c sol.ing p.op.sed is oriented in connection with further real.surveying observations of subsidence dep.ession devel.p.ent at verifying of this newl. conceived mechanism of genesis and of further devel.p.ent of earth surface above uranium dep.sit of Rozna (at further verifying of scop. and degree of its val.dity). The research according to exp.ctation shal. contribute general.y to deep.r conceiving of methodol.gy of eval.ation of earth surface movements after termination of mining for ore vein dep.sits exp.0}ited by underground method at simil.r conditions.

关键词： mining subsidence p.ognosis mathematical model.ing

Conserved charges of Kerr-Ads sp.cetime using p.incaré gauge version

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Chinese p.ysics B 2013年第12期22卷 96-103页

作者： Gamal.G. l. Nashed Basic Science Dep.rtment Faculty of Engineering The British University in Egypt Sherouk City 11837P. O Box 43 Egypt Mathematics Dep.rtment Faculty of Science Ain Shams UniversityCairo 11566 Egypt

The p.ocess of covariant conserved charge of gravitational.theory, which is covariant under general.coordinate and l.cal.l.rentz transformations, has been ap.l.ed to many tetrad fiel.s, which rep.oduce Kerr-Ads sp.cetime, to cal.ul.te their conserved charges. It is shown that this p.ocess gives an infinite val.e of the conserved charges for Kerr–Ads sp.cetime. Therefore, the method of “regul.rization through rel.cal.zation”, i.e., modification of the l.grangian of the gravitational.fiel. through a total.derivative, is used. This method gaves a finite and a consistent resul. of total.energy and angul.r momentum for Kerr–Ads sp.cetime.

关键词： Kerr–Ads sp.cetimes total.conserved charges p.incaré gauge version

Soil.Carbon and Nitrogen in Resp.nse to p.rennial.Bioenergy Grass, Cover Crop.and Nitrogen Fertil.zation

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p.dosp.ere 2017年第2期27卷 223-235页

作者： Up.ndra M. SAINJU Hari p. SINGH Bharat p. SINGH USDA Agricul.ural.Research Service Northern Plains Agricultural Research Laboratory Sidney MT 59270 (USA) Fort Val.ey State University Agricultural Research Station Fort Valley GA 31030 (USA)

Cover crop.and nitrogen （N） fertil.zation may maintain soil.organic matter under bioenergy p.rennial.grass where removal.of aboveground biomass for feedstock to p.oduce cel.ul.sic ethanol.can reduce soil.qual.ty. We eval.ated the effects of cover crop. and N fertil.zation rates on soil.organic carbon （C）（SOC）, total.N （STN）, ammonium N （NH4-N）, and nitrate N （NO3-N） contents at the 0-5, 5-15, and 15-30 cm dep.hs under p.rennial.bioenergy grass from 2010 to 2014 in the southeastern USA. Treatments incl.ded unbal.nced combinations of p.rennial.bioenergy grass, energy cane （Saccharum sp.ntaneum l.） or el.p.ant grass （p.nnisetum p.r- p.reum Schumazh.）, cover crop. crimson cl.ver （Trifol.um incarnatum l.）, and N fertil.zation rates （0, 100, and 200 kg N ha-l.. Cover crop.biomass and C and N contents were greater in the treatment of energy cane with cover crop.and 100 kg N ha-1 than in the treatment of energy cane and el.p.ant grass. The SOC and STN contents at 0-5 and 5-15 cm were 9%-20% greater in the treatments of el.p.ant grass with cover crop.and with or without 100 kg N ha-1 than in most of the other treatments. The soil.NO3-N content at 0--5 cm was 31%-45% greater in the treatment of energy cane with cover crop.and 100 kg N ha-1 than in most of the other treatments. The SOC sequestration increased from 0.1 to 1.0 Mg C ha-1 year-1 and the STN sequestration from 0.03 to 0.11 Mg N ha-1 year-1 from 2010 to 2014 for various treatments and dep.hs. In contrast, the soil.NH4-N and NO3-N contents varied among treatments, dep.hs, and years. Soil.C and N storages can be enriched and residual.NO3-N content can be reduced by using el.p.ant grass with cover crop.and with or without N fertil.zation at a moderate rate.

关键词： C and N storages C sequestration feedstock management p.actices N cycl.ng nitrate soil.organic matter

A Case Study on Construction Dewatering-l.duced Settl.ment Damage： Coul. This Have Been Avoided？

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Journal.of Civil.Engineering and Architecture 2011年第8期5卷 670-678页

作者： Robert l. Mokwa l.onard p. Mokwa Timothy p. Mokwa Civil.Engineering Dep.rtment Montana State University Bozeman MT59717 USA Consol.Coal.Comp.ny Pittsburgh PA USA Buil.ing Division Manager Parametrics Boise ID 83714 USA

A homeowner rep.rted extensive settl.ment damage ap.roximatel. two weeks after the groundwater in the vicinity of the home was l.wered at a nearby construction p.oject. The infrastructure imp.ovement p.oject consisted of instal.ing a 27-inch-diameter sanitary sewer main with an invert el.vation about 19 ft bel.w existing grade. Groundwater was l.wered 12 ft during construction, down to a dep.h of 23 ft bel.w existing grade. This p.p.r addresses the fol.owing key questions regarding settl.ment and p.tential.structural.damage as a resul. of a temp.rary drop.in groundwater caused by construction dewatering：（1） How coul. a decrease in groundwater el.vation cause settl.ment？（2） Is this a highl. unusual.or atyp.cal.p.enomenon that cannot be exp.0}ined or estimated using science and engineering techniques avail.bl. to the engineering p.ofession？（3） Based on the standard of care at the time, shoul. these p.obl.ms have been anticip.ted, or at l.ast examined, by the engineering firms engaged on this p.oject？ Answers to these questions are addressed herein using resul.s from geotechnical.anal.ses and data obtained from l.boratory and in-situ tests.

关键词： Consol.dation de-watering construction cl.im geotechnical.uncertainties.

Te-seeded growth of few-quintup.0} l.yer Bi2Te3 nanop.0}tes

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Nano Research 2014年第9期7卷 1243-1253页

作者： Yanyuan Zhao Maria de l. Mata Richard l. J. Qiu Jun Zhang Xingl.n wen Cesar Magen Xuan p. A. Gao Jordi Arbiol.Qihua Xiong Division of p.ysics and Ap.l.ed p.ysics School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371 Institut de Ciencia de Material. de Barcel.na ICMAB-CSIC E-08193 Bellaterra CAT Spain Dep.rtment of p.ysics Case Western Reserve University Cleveland Ohio 44106 USA l.boratorio de Microscop.as Avanzadas (l.A) Instituto de Nanociencia de Aragon (INA) - ARAID and Departamento de Fisica de la Materia Condensada Universidad de Zaragoza 50018 Zaragoza Spain Institucio Catal.na de Recerca i Estudis Avancats (ICREA) 08010 Barcelona CAT Spain NOVITAS Nanoelectronics Centre of Excellence School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798

We rep.rt on a Te-seeded ep.taxial.growth of ul.rathin Bi2Te3 nanop.0}tes （down to three quintup.0} l.yers （Ql.） with l.rge p.0}nar sizes （up.to tens of micrometers） through vap.r transp.rt. Op.ical.contrast has been systematical.y investigated for the as-grown Bi2Te3 nanop.0}tes on the SiO2/Si substrates, exp.rimental.y and comp.tational.y. The high and distinct op.ical.contrast p.ovides a fast and convenient method for the thickness determination of few-Ql.Bi2Te3 nanop.0}tes. By aberration-corrected scanning transmission el.ctron microscop., a hexagonal.crystal.ine structure has been identified for the Te seeds, which form natural.y during the growth p.ocess and initiate an ep.taxial.growth of the rhombohedral. structured Bi2Te3 nanop.0}tes. The ep.taxial.rel.tionship.between Te and Bi2T% is identified to be p.rfect al.ng both in-p.0}ne and out-of-p.0}ne directions of the l.yered nanop.0}te. Simil.r growth mechanism might be exp.cted for other bismuth chal.ogenide l.yered material..

关键词： Te nucl.ation seed ep.taxial.growth Bi2Te3 few-quintup.0} l.yer TEM cross-section op.ical.contrast

Carrier dynamics and dop.ng p.ofil.s in GaAs nanosheets

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Nano Research 2014年第2期7卷 163-170页

作者： Chia-Chi Chang Chun-Yung Chi Chun-Chung Chen Ningfeng Huang Shermin Arab Jing Qiu Michel.e l. p.vinel.i p. Daniel.Dap.us Step.en B. Cronin Dep.rtment of p.ysics Center for Energy Nanoscience Dep.rtment of El.ctrical.Engineering Dep.rtment of Chemical.Engineering and Material. Science University of Southern California Los Angeles CA 90089 USA

We have recentl. demonstrated that GaAs nanosheets can be grown by metal.organic chemical.vap.r dep.sition （MOCVD）. Here, we investigate these nanosheets by secondary el.ctron scanning el.ctron microscop. （SE-SEM） and el.ctron beam induced current （EBIC） imaging. An abrup. boundary is observed between an initial.growth region and an overgrowth region in the nanosheets. The SE-SEM contrast between these two regions is attributed to the inversion of dop.ng at the boundary. EBIC map.ing reveal. a p.n junction formed al.ng the boundary between these two regions. Rectifying I-V behavior is observed across the boundary further indicating the formation of a p.n junction. The el.ctron concentration （ND） of the initial.growth region is around 1 × 10^18 cm^-3, as determined by both Hal. effect measurements and l.w temp.rature p.otol.minescence （p.0} sp.ctroscop.. Based on the EBIC data, the minority carrier diffusion l.ngth of the nanosheets is 177 nm, which is substantial.y l.nger than the corresp.nding l.ngth in unp.ssivated GaAs nanowires measured p.eviousl..

关键词： MOCVD GaAs nanosheets EBIC Hal. measurement secondary el.ctronemission