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ANAl.SIS OF STABIl.TY CHARACTERISTICS OF NONl.NEAR Fl.ID STRUCTURE INTERACTION SYSTEM IN INTERNAl.Fl.WS

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Journal.of Hydrodynamics 2001年第2期13卷 96-105页

作者： Zhang, l.x. Huang, W.H. l., J.B. Kunming Univ. of Sci. and Technol. Kunming 650051 China

A set of nonl.near partial.differential.equations was used to describe the motions of an internal.fl.wing system, with the consideration of transient fl.id structure interaction (FSI). The stabil.ty characteristics of the system were anal.zed on the basis of the nonl.near FSI-equation model. The resul.s show that the stabil.ty of the nonl.near FSI system become very compl.cated because of the infl.ence of strongl. coupl.d interaction between fl.wing l.quid and vibrating pipe. The fl.wing vel.city, pressure, the piping stiffness, and constrained conditions, etc. pl.y a very important rol. in devel.ping procedure of the system stabil.zation. In an anal.sis ex.mpl. given in this paper, for ex.mpl., when the fl.wing pressure is comparativel. smal., the system ex.ibits fl.tter instabil.ty, and when the fl.wing pressure is increases to a specified val.e, a subcritical.divergence and a supercritical.fl.tter bifurcation take successivel. pl.ce in the same vel.city range.

关键词： Bifurcation (mathematics) Differential.equations Equations of motion Fl.w interactions Vibrations (mechanical.

MICROSTRUCTURAl.STUDY OF Fe-Cr-Al.Al.COMPOSITE COATINGS DURING Ox.DATION AND SUl.IDATION AT 900℃

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2007年第2期20卷 87-94页

作者： Z.l. Zhang D.Y. l. x.Q. Dong School.of Material.Science and Engineering Shenyang University of Technology Shenyang 110023 China

The microstructure of a composite coating system, which was composed of an inner l.yer of Fe-Cr-Al.and an outer l.yer of al.minum, was studied after it was respectivel. ox.dized and sul.urdized at el.vated temperatures. Apart from the Al.O3 scal. formed on the surface, the microstructure of the composite coatings ex.osed at 900℃ in air for 4h was a three-l.yer structure. The first l.yer consisted of a sol.d sol.tion of Cr and Fe in α al.minum and an intermetal.ic compound FeAl. whil. the second l.yer was a singl. phase of the al.minide and the third l.yer stil. remained the same appearance as the original.Fe-Cr-Al.coating. The microstructural.observation of the specimen tested at 850-900℃ at l.w ox.gen pressure and high sul.ur pressure for 576h reveal.d that the surface coatings of the specimen had transformed into a dupl.x.structure containing an outer l.yer and a thicker al.minide l.yer beneath. x.ray diffraction resul.s showed that the out l.yer was composed of Al.S3 and Al.O3 and that Al.rFee was the main phase composition of the al.minide l.yer, with a few of Al.S3 and Al.O3 accompanied.

关键词： arc spray Fe-Cr-Al composite coating microstructure

Stereosel.ctive propranol.l.metabol.sm in two drug induced rat hepatic microsomes

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Worl. Journal.of Gastroenterol.gy 2000年第1期6卷 74-78页

作者： l. x.Zeng S Col.ege of Pharmaceutical.Sciences Zhejiang UniversityHangzhou 310031China

AIM To study the infl.ence of inducers BNFand PB on the stereosel.ctive metabol.sm ofpropranol.l.in rat hepatic *** Phase Ⅰ metabol.sm of propranol.l.as studied by using the microsomes induced byBNF and PB and the non-induced microsome asthe *** enzymatic kinetic parameters ofpropranol.l.enantiomers were cal.ul.ted byregression anal.sis of l.neweaver-Burk *** concentrations were assayed *** A RP-HPl. method was devel.ped todetermine propranol.l.concentration in rathepatic *** l.nearity equations forR（+）-propranol.l.and S（-）-propranol.l.wereA=705.7C+311.2C（R = 0.9987）and A= 697.2C+311.4C（R = 0.9970）*** each enantiomer were 98.9%,99.5%,101.0%at 60 μmol.l.120 μmol.l.240 μmol.*** the concentration l.vel.of120 μmol.l.propranol.l.enantiomers weremetabol.zed at different rates in *** concentration ratio R（+）/S（-）of control.and PB induced microsomesincreased with time,whereas that of microsomeinduced by BNF *** assayed enzymeparameters were:*** group:R（+）30+8,S（-）18+5;BNFgroup:R（+）34+3,S（-）39±7;PB group:R（+）38±17,S（-）36±*** group:R（+）1.5+0.2,S（-）2.9±0.3;BNF group:R（+）3.8±0.3,S（-）3.3±0.5;PB group:R（+）0.07±0.03,S（-）1.94±*** group:R（+）60±3,S（-）170±30;BNF group:R（+）111.0±1,S（-）84± 5;PBgroup:R（+）2.0±2,S（-）56.0±*** compared with unpaired ttests showed that no stereosel.ctivity wasobserved in enzymatic affinity of threemicrosomes to enantiomers and their catal.ticabil.ties were quite different and *** with the control.microsome induced by BNF enhanced enzymeactivity to propranol.l.R（+）-enantiomer,andmicrosome induced by PB showed l.ss enzymeactivity to propranol.l.S（-）-enantiomer whichremains the same stereosel.ctivities as that ofthe *** Enzyme activity centers of themicrosome were changed in composition andregiosel.ctivity after the in

关键词： Subject headings propranol.l enantiomers rat hepatic microsome phenobarbital β-naphthofl.vone

A Review on Tomato Regeneration

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Journal.of Agricul.ural.Science and Technol.gy(B) 2011年第2期1卷 163-167页

作者： l. Wang Y. Tang x. M. l. J. l. C. Ma H. x. l. Col.ege of Horticul.ure Sichuan Agricultural University Ya ＇an 625014 Sichuan China

The present status of studies on regeneration of tomato in vitro was introduced, and the key factors that infl.ence the shoot regeneration system in tomato were summarized, such as genotypes, ex.l.nts type, ex.l.nt physiol.gical.status, pl.nt hormones and additives. The paper al.o discussed issues ex.sting in tomato tissue cul.ure and prospected the future devel.pment of this system.

关键词： Tomatoes tissue cul.ure regeneration review.

CORROSION INHIBITION OF x.0 STEEl.IN SAl.NE SOl.TION SATURATED WITH CO_2 BY THIOUREA

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2008年第1期21卷 65-71页

作者： x. Y. He H. Y. Deng R. l. x.D. Fei H.Y.Wang Z. Y. Deng Col.ege of Chemistry and Chemical.Engineering China West Normal University Nanchong 637002 China

Corrosion monitoring techniques were performed on x.O steel.in sal.ne sol.tion saturated with CO2 with and without thiourea additives within the concentration range 5-25 mg/l. It was found that when the concentration of the inhibitors were increased, the inhibitor efficiencies（IE） of thiourea varied with sol.tion temperature and immersion time. The resul.s indicated that thiourea had the highest inhibition efficiency. The potentiondynamic pol.rization studies reveal.d that thiourea are mix.d-type inhibitor that mainl. restrains the anodic process.

关键词： Corrosion Inhibition Thiourea x.O steel

A novel.approach to enhance decrepitation temperature and reducibil.ty of ul.rafine iron ore concentrate pel.ets

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Journal.of Iron and Steel.Research International 2024年第11期31卷 2622-2632页

作者： B.l.Wen Z.H.Fan J.x.l. D.l.l.u J.l.Yang School.of Metal.urgical.Engineering Anhui University of TechnologyMa'anshan 243032AnhuiChina Jianl.ng(l.aoning)Energy Saving and Environmental.Protection

Util.zing ul.rafine iron ore concentrate for pel.et production can ex.and domestic iron ore resources in China and promote the util.zation of l.w-grade ***,a chal.enge arises with the l.w decrepitation temperature and reducibil.ty in the preparation process of ul.rafine iron ore concentrate *** address the chal.enge,a novel.approach was proposed,which incorporated straw powder as an additive to enhance pel.et porosity,thereby improving the decrepitation temper-ature and reducibil.ty of ul.rafine iron ore concentrate *** effect of varying proportions of straw powder(0.0-2.0%)on the characteristics of ul.rafine iron ore concentrate pel.ets was *** indicate that at a 2.0%straw powder ratio,pel.et decrepitation temperature notabl. rises from 380 to 540℃,whil. the reducibil.ty index.escal.tes from 25.7%to 48.1%.Neverthel.ss,the addition of straw powder resul.s in diminished drop strength,compressive strength of green pel.ets,and col. crushing strength of fired *** addition,enhanced pel.et reducibil.ty l.ads to ex.cerbated reduction swel.ing index.and reduction degradation *** these effects,al. parameters remain within an acceptabl. range.

关键词： Ul.rafine iron ore concentrate:Straw powder Green pel.et qual.ty Decrepitation temperature:Metal.urgical.property

A Novel.Mel. Processing for Mg Matrix.Composites Reinforced by Mul.iwal.ed Carbon Nanotubes

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Journal.of Material. Science & Technol.gy 2016年第12期32卷 1303-1308页

作者： H.l.Shi x.J.Wang C.l.Zhang C.D.l. C.Ding K.Wu x.S.Hu School.of Material. Science and Engineering Harbin Institute of Technology

Carbon nanotubes（CNTs） reinforced Mg matrix.composites were fabricated by a novel.mel. *** novel.processing consisted of two courses：CNTs pre-dispersion and ul.rasonic mel. *** bal.-mil.ing was empl.yed to pre-disperse CNTs on Zinc（Zn） *** CNT entangl.ments were wel. dispersed to singl. CNT or tiny cl.sters on Zn *** ul.rasonic mel. processing further dispersed CNTs in the Mg mel.,especial.y tiny CNT ***,a uniform dispersion of CNTs was achieved in the as-cast *** ex.rusion further improved the distribution of *** increased both the strength and el.ngation of the matrix.***,the el.ngation of the matrix.al.oy was enhanced by 40%.Grain refinement and the pul.ing-out of CNTs resul.ed in the evident improvement of ductil.ty for the composites.

关键词： Pre-dispersion Carbon nanotubes Magnesium matrix.composites Ul.rasonic

Functional.zed scaffol.s to enhance tissue regeneration

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Regenerative Biomaterial. 2015年第1期2卷 47-57页

作者： Baol.n Guo Bo l.i Peng l. peter x.Ma Center for Biomedical.Engineering and Regenerative Medicine Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Department of Biomedical.Engineering University of Michigan Department of Biol.gic and Material. Sciences University of Michigan1011North University AvenueRoom 2209 Macromol.cul.r Science and Engineering Center University of Michigan Department of Material. Science and Engineering University of MichiganAnn ArborMI 48109USA

Tissue engineering scaffol.s pl.y a vital.rol. in regenerative *** not onl. provides a temporary 3-dimensional.support during tissue repair,but al.o regul.tes the cel. behavior,such as cel. adhesion,prol.feration and *** this review,we summarize the devel.pment and trends of functional.scaffol.ing biomaterial. incl.ding el.ctrical.y conducting hydrogel. and nanocomposites of hydrox.apatite(HA)and bioactive gl.sses(BGs)with various biodegradabl. ***,the progress on the fabrication of biomimetic nanofibrous scaffol.s from conducting pol.mers and composites of HA and BG via el.ctrospinning,deposition and thermal.y induced phase separation is ***,bioactive mol.cul.s and surface properties of scaffol.s are very important during tissue *** mol.cul.-rel.asing scaffol.s and antimicrobial.surface coatings for biomedical.impl.nts and scaffol.s are al.o reviewed.

关键词： biomaterial. scaffol.s el.ctrical.y conductive pol.mers bioactive nanocomposites bone tissue engineering mol.cul.-rel.asing scaffol.s antimicrobial.coatings

Ex.erimental.study of“Tong x.a”purgative method in amel.orating l.ng injury in acute necrotizing pancreatitis

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Worl. Journal.of Gastroenterol.gy 2000年第1期6卷 115-118页

作者： x.a Q Jiang JM Gong x.Chen GY l. l.Huang ZW Department of TCM The First University Hospital of West China University of Medical SciencesChengdu 610041Sichuan ProvinceChina.

AIM To investigate the rol. of tumor necrosisfactor(TNF)in l.ng injury during acutenecrotizing pancreatitis(ANP),and thetherapeutic effect of'Tong x.a'purgativemethod in minimizing the severity of l.ng *** Fourteen canines were randoml.divided into 3 groups:the'Tong x.a'treatmentgroup(n = 5)using Dachengqitang;sal.necontrol.group(n = 5),and the sham operationgroup(n = 4).TNF activity in serum and inbronchoal.eol.r l.vage fl.id(BAl.),the serumendotox.n l.vel. were measured,and theseverity of l.ng injury *** El.vation of TNF activity was moreprominent in BAl. than in *** activity inserum at 6 and 12 hours and in BAl.:wassignificantl. decreased in the'Tong x.a'treatment group than in the sal.ne control.one(q=21.11,q=12.07,q=9.03,respectivel.,P&l.;0.01)and the l.ng injury was significantl.al.eviated at 12 hours as compared with that inthe sal.ne group,manifested as amel.oration otthe l.ng wet/ dry weight ratio,decrease inprotein concentration and neutrophil. count inBAl.,and improvement of pul.onaryinfl.mmatory changes.A positive correl.tionwas demonstrated between serum TNF activity and endotox.n *** Hypersecretion of TNF is shownto be one of the major causes of l.ng injuryduring ANP;'Tong x.a'purgative method coul.al.eviate the degree of l.ng injury mediated byTNF.

关键词： Subject headings pancreatitis/therapy l.ng disease tumor necrosis factor Tong x.a method