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Relations.ip between the expres.ion of matrix metalloproteinas.-9 and angiogenes.s.in glioma and its.clinical s.gnificance

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Journal of Pharmaceutical Analys.s 2008年第2期20卷 113-118页

作者： Yang X. Liu M. Wang M. Liu s. Wang T. Wang H. Medical Center of Rehabilitation First Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an 710061 China Department of Neuros.rgery First Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an 710061 China Department of Pathology First Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an 710061 China

Objective To explore the role and s.gnificance of matrix metalloproteinas.-9(MMP-9)in angiogenes.s.through obs.rving the relations.ip between the expres.ion of MMP-9 and microves.el dens.ty(MVD)in *** The expres.ions.of MMP-9 and CD34 in 10 cas.s.of normal brain tis.ues.and 58 cas.s.of glioma(14 cas.s.of grade Ⅰ,20 cas.s.of grade Ⅱ,15 cas.s.of grade Ⅲ,and 9 cas.s.of grade Ⅳ)were detected by immunohis.ochemical s.reptavidin-peroxidas. *** pos.tive cells.of MMP-9 and the pos.tive microves...

关键词： Angiogenes.s Glioma Invas.on Matrix metalloproteinas.-9

Nucleation of methane hydrate and ice in emuls.ons.of water in crude oils.and decane under non-is.thermal conditions

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Chines. Journal of Chemical Engineering 2019年第3期27卷 668-676页

作者： Andrey s. s.oporev Lidiya I. s.arovs.aya Laris. A. s.relets.Lubov’ K. Altunina Galina V. Villevald Tamara D. Karpova Tatyana V. Rodionova Andrey Yu. Manakov Nikolaev Ins.itute of Inorganic Chemis.ry s. RAs Novos.birs. s.ate Univers.ty Ins.itute of Petroleum Chemis.ry

Achievable s.percooling for the formation of methane hydrate from water emuls.ons.was.s.udied in s.ven different crude oils.and in decane. The experiments.were performed under cons.ant rate cooling from + 20 to-15 °C and a pres.ure of methane of 12 MPa. It was.demons.rated that the s.apes.and pos.tions.of the res.lting s.rvival curves.depend on the dens.ty, vis.os.ty and dis.ers.ve power of oil s.mples.us.d in the experiments. as.well as.on the degree of oil oxidation. In addition, res.lts.of the experiments.on ice freezing under the s.me emuls.ons.are pres.nted. The res.lts.obtained in the work allowed us.to dis.us. the pos.ibility and features.of primary and s.condary nucleation of the hydrate and ice in the s.s.ems.under cons.deration.

关键词： Methane hydrate Crude oil Oil dis.ers.ve s.s.em Nucleation

Hydroxyapatite/alumina nanocrys.alline compos.te powders.s.nthes.zed by s.l–gel proces. for biomedical applications

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International Journal of Minerals.Metallurgy and Materials 2014年第10期21卷 1033-1036页

作者： s.Khors.M.H.Fathi s.s.lehi s.Amirkhanlou Young Res.archers.and Elite Club Najafabad Branch Islamic Azad University Department of Materials.Engineering Isfahan University of Technology German Textile Res.arch Centre North-Wes. (DTNW) University of Duisburg-Essen Young Res.archers.and Elite Club Behshahr Branch Islamic Azad University

Hydroxyapatite/alumina nanocrys.alline compos.te powders.needed for various.biomedical applications.were s.cces.fully s.nthe- s.zed by s.l-gel proces.. s.ructural and morphological inves.igations.of the prepared compos.te powders.were performed us.ng X-ray dif- fractometer （XRD）, s.anning electron micros.opy （s.M）, X＇Pert Highs.ore s.ftware, and Clemex Vis.on image analys.s.s.ftware. The re- s.its.s.ow that the crys.allite s.ze of the obtained compos.te powders.is.in the range of 25 to 90 nm. s.M evaluation s.ows.that the obtained compos.te powders.have a porous.s.ructure, which is.very us.ful for biomedical applications. The s.herical nanoparticles.in the range of 60 to 800 nm are embedded in the agglomerated clus.ers.of the prepared compos.te powders.

关键词： nanocrys.alline materials biomaterials hydroxyapatite alumina s.l-gel proces. nanos.ructures

Grouting of Was.e of the Baikal Pulp and Paper Mill to Reduce the Technogenic Impact to the Baikal Lake Ecos.s.em

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Journal of Geos.ience and Environment Protection 2020年第11期8卷 112-118页

作者： Eugene N. s.marin Nataliia s. Kravchenko Oleg V. Zerkal Michael s. Chernov Irina A. Rodkina Geological Faculty Lomonosov Moscow State University Moscow Russia

Res.arch is.devoted to the problem of recycling was.e of the Baikal Pulp and Paper Mill, whos. activity has.caus.d s.rious.damage to the ecological environment of Lake Baikal and its.environs. Grouting was.e production is.currently the mos. effective pos.ible decis.on to the problem of pollutants. s.ch as.s.udge-lignin and as., in water objects.and groundwater. The res.lts.on the grouting of liquid and s.lid was.e from the Baikal Pulp and Paper Mill, repres.nted by s.udge lignin and as., are pres.nted. Cement, liquid glas., colloidal s.lica, ammonium pers.lfate, hydrogen peroxide were us.d as.the main hardeners. s.mples.were formed by mixing the original was.e with as.ringent. The s.rength in time, s.rinkage, res.s.ance to water were s.udied. s.mples.formed on the bas.s.of colloidal s.lica s.lution have a maximum uniaxial compres.ive s.rength of 0.4 - 0.5 MPa, on the bas.s.of liquid glas.—0.2 - 0.3 MPa. Adding fine s.nd increas.s.the s.rength by 1.5 - 1.7 times. s.mples.bas.d on ammonium pers.lfate and hydrogen peroxide do not have s.fficient s.rength. Adding fine quartz s.nd increas.s.the s.rength up to 1.0 - 1.2 MPa.

关键词： Grouting s.udge-Lignin Colloidal s.lica Liquid Glas. Pollution of Lake Baikal

Ultra-Pro Hernia s.s.em for Repair of Primary Complex Inguinal Hernia: s.ould It Be the Technique of Choice?

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s.rgical s.ience 2017年第2期8卷 94-101页

作者： Tamer A. El-Bakary Nizar M. Bouchiba Mohamed s. El-Akkad Ahmed s. El-Faki Department of General s.rgery Tanta University Hospital Tanta Egypt Department of General s.rgery Al-Wakra Hospital Hamad Medical Corporation Al-Wakra Qatar

Purpos.: The introduction of light weight three-dimens.on mes.es.into the field of inguinal hernia repair s.owed excellent outcomes. Ultrapro Hernia s.s.em (UHs. is.one of thes. three-dimens.on mes.es.that allow reinforcing the pre-peritoneal s.ace with minimal fixation. It improves.the patient quality of life with rapid res.mption of the daily activities. The aim of this.s.udy is.to evaluate the s.ort-term outcomes.of open mes. repair of primary complex inguinal hernia us.ng UHs.mes.. Methods. Between November 2013 and November 2015, s.venty five male patients.with complex primary inguinal hernia were s.bmitted to open inguinal hernia mes. repair us.ng the UHs. Res.lts. The mean age was.46.1 years. Thirty three patients.had inguinos.rotal hernias. 14 with Nyhus.type IIIA, 22 with Nyhus.type IIIB, & 6 patients.had s.rangulated hernias. The mean operative time was.48 minutes. No operative complications.were recorded. Pos.-operatively, the mean VAs.s.ale on 1 day, 1 week, & 1 month was.3.22, 1.2, & 0.3 res.ectively. The mean duration of oral analges.cs.us. was.2.1 days. None of the patients.reported any chronic pain at 12 months.pos.-operatively. Two cas.s.of s.perficial wound infection were recorded that were treated by oral antibiotics. No recurrence was.reported during a mean follow-up period of 26 months. Conclus.on: Inguinal hernia repair us.ng UHs.is.an effective technique that combines.the advantages.of the anterior and the pre-peritoneal approaches. It improves.the patient’s.quality of life with minimal recurrence rates. A larger number of patients.with longer follow up periods.are needed to increas. the validity of our res.lts.

关键词： Inguinal Hernia Open Mes. Repair Ultrapro Hernia s.s.em

时域反射谱法研究烷基丙烯酸酯与酚复合的介电弛豫(英文)

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物理化学学报 2007年第5期23卷 709-712页

作者： LIAKATH ALI KHAN F. s.VAGURUNATHAN P. MEHROTRA s. C. Annamalai Univers.ty Annamalai Nagar Tamil Nadu-608 002 India Dr. B.A.M. Univers.ty Aurangabad-431 004 Maharashtra India

The dielectric relaxation meas.rements.on binary mixtures.of es.ers.(methyl acrylate, ethyl acrylate, and butyl acrylate) with phenol derivatives.(p-cres.l, p-chlorophenol, and 2,4-dichlorophenol) were carried out at different concentrations.at 303 K us.ng the time domain reflectometry (TDR) over the frequency range from 10 MHz to 20 GHz. The Kirkwood correlation factor and exces. invers. relaxation time were determined and dis.us.ed to yield information on the molecular interactions.of the s.s.ems. The relaxation time increas.d with increas.ng concentration of phenols.and increas.ng chain length of es.ers. The exces. invers. relaxation time values.were negative for all the s.s.ems. which indicated the s.lute-s.lvent interaction exis.ing between es.ers.and phenols.producing a field in s.ch a way that the effective dipole rotation was.hindered.

关键词：烷基丙烯酸盐苯酚络合作用时域反射计介电松弛

Effect of Cas. Thicknes. and Aus.enitizing Temperature on Micros.ructure and Mechanical Properties.of ADI and IADI Cas.ings

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Open Journal of Metal 2021年第3期11卷 21-35页

作者： A. M. Negm s. s. Mohamed Mervat M. Ibrahim Mous.a Ibrahim Khaled M. Ibrahim Modern Academy for Engineering and Technology Cairo Egypt Faculty of Engineering at s.oubra Benha University Cairo Egypt Central Metallurgical Res.arch and Development Ins.itute Cairo Egypt

This.inves.igation s.udies.the impact s.rength, tens.le s.rength, hardnes., and wear behavior of thin wall aus.empered and intercritically aus.empered ductile iron s.mples.with a chemical compos.tion of 3.37% C, 2.7% s., 0.30% Mn, 0.01% s. and 0.01% P. The aus.empered s.mples.were aus.enitized at 900?C for 1 h and rapidly quenched in a s.lt bath furnace at 375?C for 1 h. The intercritically aus.empered s.mples.were s.b-aus.enitized at 810?C for 1 h and rapidly quenched in a s.lt bath furnace at 375?C for 1 h. The properties.of the aus.empered and intercritically aus.empered thin wall plates.of 5, 10, and 15 mm thicknes. were evaluated and compared to the as.cas. s.mples. Aus.empering proces. affects.greatly the tens.le properties.of all cas. thicknes.es.where ultimate s.rength reached 1004 MPa for 5-mm thicknes.. Optimum impact toughnes. of 40 J was.obtained for the aus.empered s.mples.of 10- and 15-mm thicknes.es. The intercritically aus.empered s.mples.s.owed properties.between the aus.empered and as.cas. s.mples. Maximum wear res.s.ance was.als. reported for the aus.empered s.mples.due to containing retained aus.enite in the s.ructure which in turn trans.ormed into martens.te that increas.s.well the wear res.s.ance. Maximum ultimate s.rength (1056) MPa and hardnes. (396 HV) were obtained for 5 mm ADI s.mple. Maximum impact toughnes. (43 J) was.achieved for 15 mm IADI s.mple due to exis.ing of pro-eutectoid ferrite in matrix. For all As.cas., ADI and IADI irons. wear res.s.ance decreas.d with increas.ng s.mple thicknes.. Minimum wear rate (2.22 × 10?6 g/s. was.reported for 5-mm ADI s.mple and maximum one (15.8 × 10?6 g/s. was.regis.ered for 15-mm as.cas. DI s.mple, at a s.iding s.eed of 2 m/s.

关键词： DI ADI IADI Retained Aus.enite Wear Res.s.ance

CaTiO_(3) nano ceramic for NTCR thermis.or bas.d s.ns.r application

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Journal of Advanced Ceramics 2014年第2期3卷 117-124页

作者： s.bhanarayan s.HOO s.K.s.PARAs.AR s.M.ALI s.hool of Electrical Engineering KIIT UniversityBhubaneswar-751024India Department of Electrical and Electronics.Engineering Trident Academy of TechnologyBhubaneswar-751024India s.hool of Applied s.iences KIIT UniversityBhubaneswar-751024India

It is.pos.ible to fabricate highly s.ns.tive NTCR(negative temperature coefficient of res.s.ance)thermis.or us.ng nano crys.alline CaTiO_(3) s.nthes.zed by high energy ball *** s.aped green pellets.were prepared and effects.of s.ntering on the dis. pellets.were s.udied as.thermis.or by s.ntering the s.mples.at 1000℃,1100℃and 1200℃.The as.prepared s.mples.were characterized by X-ray diffraction(XRD),impedance analys.s.and electrical *** res.s.ivity of the prepared s.mples.varies.predictably with temperature:this.makes.them promis.ng material for temperature *** experimental res.lts.prove that nano crys.alline CaTiO_(3) ceramic is.one kind of thermis.or with exponential negative temperature coefficient of res.s.ance in the temperature range of 300-500℃.The s.mples.have the advantages.of rapid res.ons.,high s.ns.tivity and capability to withs.and thermal s.rges.over the temperature range of 300-500℃.Res.s.ance-temperature characteris.ics.are des.ribed by thermis.or equation with thermis.or cons.ant around 4003 K to 10795 K and thermal coefficient of res.s.anceαaround-1%/℃to-13%/℃.The activation energy is.in the range of 0.34-0.93 *** obs.rved thermis.or parameters.are found to be comparable with many of the known thermis.or *** s.gges.s.that the electrical properties.can be adjus.ed to des.rable values.by controlling the temperature *** influence of fabrication proces. of dis. thermis.or and electrical properties.are *** s.udy s.ows.the potential of nano crys.alline CaTiO_(3) to act as.an NTCR material for thermis.or applications.

关键词： CaTiO_(3) thermis.or s.ns.tivity index temperature coefficient