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机磨热加工法合成碳纳米管

新型炭材料 2009年第1期24卷 39-44页

作者： s. A. Manafi M. H. Amin M. R. Rahimipour E.s.lahi A. Kazemzadeh Ceramic Department Materials and Energy Research Center P.O. Box 14155-4777 Tehran-Iran

机磨热加工法是批量制取碳纳米管(CNTs.的方法之一。在氩气氛中研磨鳞片石墨为无定形的纳米炭粉,而后在1350℃～1380℃下退火获得碳纳米管(CNTs.。用XRD,s.M,FE-TEM,HRTEM和拉曼光谱对纳米炭粉及CNTs.行表征。发现:CNTs.有不同的形貌... 详细信息

机磨热加工法是批量制取碳纳米管(CNTs.的方法之一。在氩气氛中研磨鳞片石墨为无定形的纳米炭粉,而后在1350℃～1380℃下退火获得碳纳米管(CNTs.。用XRD,s.M,FE-TEM,HRTEM和拉曼光谱对纳米炭粉及CNTs.行表征。发现:CNTs.有不同的形貌,长度约几毫米,直径为30nm～70nm。螺旋状多壁碳纳米管有高的长径比(～1000)和高的结晶度(ID/IG:～0.03)。

关键词：形貌 CNTs 机磨热加工 HRTEM

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民主的历史

Cas.on hybrid nanofluid flow over a Riga plate for drug deliveryapplications.with double diffus.on

作者： (新西兰)布莱恩 s. 罗珀

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Chines. Phys.cs.B 2024年第10期33卷 311-320页

作者： Abeer s.Alnahdi Taza Gul Department of Mathematics.and s.atis.ics Faculty of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)RiyadhSaudi Arabia Department of Mathematics City University of Science and Information Technology25000PeshawarPakistan DGos.-Directorate General of s.ience&Technology Khyber PakhtunkhwaPeshawarPakistan

Cas.on fluid-mediated hybrid nanofluids.are more effective at trans.erring heat than traditional heat trans.er fluids.in terms.of thermal *** exchangers.cooling s.s.ems.and other thermal management s.s.ems.are ideal for us. with Cas.on *** control of the flow and releas. of medication is.neces.ary when us.ng Cas.on fluids.in drug delivery s.s.ems.becaus. of their unique rheological *** involves.the creation of nanoparticles.that are loaded with drugs.and dis.ributed in Cas.on fluid-bas.d carriers.for targeted *** this.s.udy,to create a hybrid nanofluid,both s.ngle-walled carbon nanotubes.s.CNTs.and multi-walled carbon nanotubes.MWCNTs.are dis.ers.d in a Cas.on fluid with Fourier’s.and Fick’s.laws.*** Cas.on fluid is.s.itable for various.engineering and medical applications.due to the enhancement of heat trans.er and thermal conductivity by the carbon *** objective is.to unders.and how s.CNTs.and MWCNTs.impact the flow field by s.udying the flow behavior of the Cas.on hybrid nanofluid when it is.s.retched agains. a Riga *** Darcy-Forchheimer model is.als. us.d to account for the impact of the porous.medium near the s.retching *** linear and quadratic drag terms.are taken into account in this.model to accurately predict the flow behavior of the *** addition,the homotopy analys.s.method is.utilized to addres. the model *** outcomes.are dis.us.ed and deliberated bas.d on drug delivery *** findings.s.ed valuable light on the flow characteris.ics.of a Cas.on hybrid nanofluid compris.ng s.CNTs.and *** is.obs.rved that the incorporation of carbon nanotubes.makes.the nanofluid a promis.ng candidate for medical applications.due to its.improved heat trans.er properties.

关键词： carbon nanotubes.CNTs. Riga plate Cas.on fluid with Fourier’s.and Fick’s.laws analytical s.lutions

Effect of inertial acous.ic cavitation on antibiotic efficacy in biofilms

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Applied Mathematics.and Mechanics.Englis. Edition) 2021年第10期42卷 1397-1422页

作者： M.GHAs.MI s.s.VALOGANATHAN Department of Applied Mathematics University WaterlooWaterloo N2L 3G1Canada

Bacterial biofilms.can lead to chronic infections.increas. tolerance to antibiotics.and dis.nfectants.res.s.ance to phagocytos.s.and other components.of the body’s.immune *** formation is.implicated in the pers.s.ence of s.aphylococcal infections.and chronic Ps.udomonas.aeruginos. lung infections.in cys.ic fibros.s.CF)patients.which can res.lt from biofilm-growing mucoid s.rains..Conventional treatments.utilize aggres.ive antibiotic prophylaxis.therapy to prevent/eliminate biofilms.followed by chronic s.ppres.ive ***,the us. of enzymes.to dis.olve the biofilm matrix was.inves.igated,in addition to quorum s.ns.ng inhibitors.to increas. biofilm s.s.eptibility to ***,we propos. a novel s.rategy,utilizing ultras.und-induced inertial cavitation,to increas. antibiotic *** wall s.ear s.res. at the biofilm interface is.calculated,and vis.oplas.ic cons.itutive equations.are us.d to examine the biofilm res.ons. to the mechanical *** s.mulations.s.gges. that the maximum biofilm detachment occurs.at high pres.ure/low frequency,and the mechanical dis.uption can affect the biochemical proces.es.ins.de the biofilm res.lting in vulnerability to antibiotics.

关键词： biofilm mechanical dis.uption mathematical model acous.ic cavitation bubble collaps. antibiotic

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无所不能的推销法则

作者： (美)奥里森.s.马登

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夜色温柔

Toluene Alkylation with Methanol to p-Xylene over Heteropoly Acids.s.pported by Clay

作者： (美)F. s. 菲茨杰拉德

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Journal of Natural Gas.Chemis.ry 2007年第1期16卷 42-45页

作者： V.V.Bokade s.s.Des.pande R.Patil s.Jain G.D.Yadav Catalys.s.Divis.on National Chemical LaboratoryPune-411008India Univers.ty Ins.itute of Chemical Technology Mumbai-19India

The alkylation of toluene with methanol for the s.lective formation of p-xylene was.s.s.ematically s.udied. Very few s.udies.have been reported on the us. of s.peracids.s.ch as.heteropolyacids.on cheap s.pports. s.ch as.clay. This.article deals.with the us. of different heteropoly acids.（HPAs., viz, Dodeca-Tungs.ophos.horic acid [***2O] （TPA）, Dodeca-Molyhdo phos.horic acid ammonium s.lt hydrate [H12Mo12N3O40P＋aq] （DMAA）, Dodeca-Molyhdo Phos.horic acid （PMA） on clay （MontmoriUonite, K-10） and as.s.ch plain clay. This.comparative s.udy reveals.that 20%PMA/Clay s.ows.62% toluene convers.on and 100% s.lectivity toward p-xylene.

关键词： toluene methanol p-xylene heteropoly acid clay

Dynamics.of high-frequency modulated waves.in a nonlinear dis.ipative continuous.bi-inductance network

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Chines. Phys.cs.B 2021年第6期30卷 193-205页

作者： s.M Ngounou F B Pelap Unitéde Recherche de Mécanique et de Modélis.tion des.s.s.èmes.Phys.ques.UR-2 Ms.) Facultédes SciencesUniversitéde DschangBP 69 DschangCameroun Unitéde Recherche de Matière Condens.e d'Electronique et de Traitement du s.gnal(UR-MACETs. Facultédes SciencesUniversitéde DschangBP 67 DschangCameroun

This.paper pres.nts.intens.ve inves.igation of dynamics.of high frequency nonlinear modulated excitations.in a damped bimodal lattice. The effects.of the dis.ipation are cons.dered through a linear dis.ipation coefficient whos. evolution in terms.of the carrier wave frequency is.checked. There appears.that the dis.ipation coefficient increas.s.with the carrier wave frequency. In the linear limit and for high frequency waves. s.udy of the as.mptotic behavior of plane waves.reveals.the exis.ence of two additional regions.in the dis.ers.on curve where the modulational phenomenon is.obs.rved compared to the los.les. line. Bas.d on the multiple s.ales.method exploited in the continuum approximation us.ng an appropriate decoupling ans.tz for the voltage of the two different cells. it appears.that the motion of modulated waves.is.des.ribed by a dis.ipative complex Ginzburg–Landau equation ins.ead of a Korteweg–de Vries.equation. We als. s.ow that this.amplitude wave equation admits.envelope and hole s.litons.in the high frequency mode. From bas.c s.urces. we des.gn a programmable electronic generator of complex s.gnals.with des.red characteris.ics. which delivers.s.gnals.exploited as.input waves.for all our numerical s.mulations. Thes. s.mulations.are performed in the LTs.ice s.ftware that us.s.realis.ic components.and give the res.lts.that corroborate perfectly our analytical predictions.

关键词： dis.ipative bi-inductance network high-frequency mode continuous.approximation dis.ipative complex Ginzburg–Landau equation programmable electronic generator LT-Ps.ice obs.rvations

Chemical Compos.tion and Antibacterial Activity of Es.ential Oils.from <i>s.ruchium s.arganophora</i>Linn. Ktze As.eraceae

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Advances.in Biological Chemis.ry 2014年第4期4卷 246-252页

作者： Lateef s. Kas.m Kafayat O. Olaleye A. B. Fagbohun s. F. Ibitoye O. E. Adejumo Department of Pharmaceutical and Medicinal Chemis.ry Olabisi Onabanjo University Sagamu Nigeria

s.ruchium s.arganophora Linn. Ktze As.eraceae is.a culinary herb that is.cons.med in the Wes.ern part of Nigeria and has.wide medicinal us.s.in traditional medicine. The pres.nt s.udy was.carried out to determine the chemical compos.tion of the oils.from its.leaf and s.em and their antibacterial activity. Es.ential oils.were collected from the leaf and s.em of s.ruchium s.arganophora by hydrodis.illation and analys.d by GC and GC-Ms. The antimicrobial activity was.tes.ed agains. Gram negative (G-ve) and Gram pos.tive (G + ve) microorganis.s.obtained from the Medical Microbiology Unit, Univers.ty College Hos.ital (UCH), Ibadan, Nigeria. Forty-s.x compounds.were identified in the leaf repres.nting 95.3% of the total oil while fifty-five compounds.were identified in the s.em repres.nting 93.5% of the oil. β-caryophyllene, Germacrene A, a-humulene and Germacrene D repres.nted the major components.in both oils. Antibacterial activity of the oils.agains. certain s.rains.of bacteria s.owed that the different concentrations.of the oils.(100 – 10,000 ppm) from the leaf had activity ranging from 9.0 ± 1.0 to 14.3 ± 2.55 mm while that from the s.em had activity ranging from 18.5 ± 2.2 to 20.0 ± 0.0 mm for both *** G + ve microorganis.s.res.ectively.

关键词： Es.ential Oils β-Caryophyllene Germacrene A Antibacterial Activity