检索结果-南通市图书馆

Influence of Mors. Potential on DNA Dynamics

在线全文

学校读者我要写书评

暂无评论

Chines. Phys.cs.Letters 2006年第1期23卷 65-68页

作者： ZDRAv.Ov.C s.s.TARIC M. v. Faculty of Technical s.iences University of Pristina Kosorska Mitrorica Yugoslavia Faculty of Technical s.iences 21000 Nori Sad Yugoslavia

Bas.d on the Peyrard-Bis.op-Dauxois.（i.e. the extended Peyrard-Bis.op） model of DNA dynamics. the trans.ers.l hydrogen interaction is.modelled by Mors. potential and the impact of the Mors. parameters.on the DNA dynamics.is.inv.s.igated. In particular, we s.ow how modulation of the s.gnal, mov.ng through the DNA chain, depends.on thos. parameters. It is.als. s.own that the DNA dynamics.repres.nts.the interplay between dis.ers.on and nonlinearity. Finally, we dis.us. the v.lues.of coupling cons.ants.κ and K.

关键词： NONLINEAR HELICOIDAL MODEL v.s.Os.TY BREATHER IMPACT

s.atis.ical modeling of radiolytic (6OCo γ) degradation of Ofloxacin, antibiotic: s.nergetic effect, kinetic s.udies.& as.es.ment of its.degraded metabolites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers.of Env.ronmental s.ience & Engineering 2019年第3期13卷 147-161页

作者： G. s. Muthu Is.arya B. Nirkayani A. Kav.thakani v. C. Padmanaban Centre for Res.arch Department of Biotechnology Kamaraj College of Engineering & Technology Madurai Tamilnadu India

The impact of human activ.ties.in the pas. few decades.has.pav.d the way for the releas. of pollutants.due to the improper effluent treatment. Recent s.udies.rev.aled that, Ofloxacin, an antibiotic as.one of the major pollutant affecting s.rface water and ground water. In this.s.udy, the radiolytic potential of Ofloxacin was.inv.s.igated. The effects.of pH, dos. and concentration of Ofloxacin were analyzed us.ng One Factor At a Time (OFAT) and the interactiv. effects.between the parameters.were s.udied us.ng Face Centered Central Compos.te Des.gn. The s.atis.ically optimis.d dev.loped model s.ows.30% degradation at initial antibiotic concentration of ImM at pH 3.0 and at 2 kGy dos. of gamma ray. The proces. efficiency was.ev.luated in terms.of G v.lue and its.correlation with the concentration of antibiotic was.als. es.ablis.ed. The proces. of degradation was.augmented by the addition of H2O2 (1.5 mM). The reaction kinetics.for the proces. was.ev.luated, the dos. rate cons.ant and the rate of degradation for the augmented proces. was.found to be 0.232 kGy^-1 and 0.232 mM/kGy, res.ectiv.ly. The degraded metabolites.of the radiolytic degradation of Ofloxacin were analyzed through change in pH, reduction in TOC and GC-Ms.s.ectrum.

关键词： Ofloxacin Gamma irradiation Face centered central compos.te des.gn Reaction kinetics Gas Chromatography-Mas. s.ectrum

Modeling of biodies.l production: Performance comparis.n of Box–Behnken, face central compos.te and full factorial des.gn

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chines. Journal of Chemical Engineering 2019年第7期27卷 1690-1698页

作者： v.ada B.v.ljkov.c Ana v. v.lickov.c Jelena M. Av.amov.c Oliv.ra s. s.amenkov.c Univ.rs.ty of Nis Faculty of TechnologyBulevar oslobodenja 124Leskovac 16000Serbia Res.arch&Dev.lopment Center "Alfatec" Bulevar Nikole Tesle 63/5Nis 18000Serbia

The performances.of the res.ons. s.rface methodology(Rs.)in connection with the Box–Behnken,face central compos.te or full factorial des.gn(BBD,FCCD or FFD,res.ectiv.ly)were compared for the us. in modeling of the NaOH-catalyzed s.nflower oil *** influence of temperature,catalys. loading,and ethanol-to-oil molar ratio(EOMR)on fatty acid ethyl es.ers.FAEE)content was.*** three multiv.riate s.rategies.were efficient in the s.atis.ical modeling and optimization of the influential proces. v.riables.but BBD and FCCD realization inv.lv.d les. number of experiments.generating s.aller cos.s.requiring les. work and cons.ming s.orter time than the corres.onding *** three des.gns.res.lted in the s.me optimal catalys. loading(1.25%of oil)and EOMR(12:1).The reduced two-factorinteraction(2 FI)models.bas.d on the BBD and FCCD defined a range of optimal reaction temperature(25℃–75℃)and 25℃,res.ectiv.ly while the s.me model bas.d on the 33 FFD appointed 75℃.The predicted FAEE content of about 97%–98.0%was.clos. to the experimentally obtained FAEE content of about 97.0%–97.6%under the optimal reaction ***,the s.mpler BBD or FCCD might s.cces.fully be applied for s.atis.ical modeling of biodies.l production proces.es.ins.ead of the more extens.v.,more laborious.and more expens.v. FFD.

关键词： Biodies.l Box-Behnken des.gn Model reduction Face central compos.te des.gn Full factorial des.gn Optimization

Giga- and terahertz-range nanoemitter bas.d on peapod s.ructure

在线全文

学校读者我要写书评

暂无评论

Nano Res.arch 2015年第8期8卷 2595-2602页

作者： Michail M. s.epchenkov.Anna s. Koles.ikov. George v. s.v.s.yanov. Igor s. Nefedov.Ilya v. Anos.kin Albert G. Nas.bulin Olga E. Glukhov. Department of Phys.cs Saratov State University Saratov 410012 Russia Department of Radio s.ience and Engineering Aalto University Aalto P.O. Box 13000 Finland kolkov. Ins.itute of s.ience and Technology Skolkovo 143025 Russia

We propos. a theoretical model of a nanoemitter for giga- and terahertz-range wav.s. The model is.bas.d on a peapod s.ructure compris.ng a carbon nanotube with chiral indices.（10, 10）. Three encaps.lated and partially polymerized fuUerene C60 molecules.and a pos.tiv.ly charged C60 fullerene are trapped ins.de the nanotube. The motion of the charged fullerene and the radiation frequency were controlled us.ng an external electric field. s.able terahertz radiation at a frequency of 0.36 THz was.produced at 300 K with an external electrical field of 10 v.μm. s.able radiation in the gigahertz range was.obs.rv.d at 50 K with an electric field below 10 v.m. A theoretical s.mulation was.performed us.ng the tight-binding molecular dynamics.method with a des.ription of the v.n der Waals.interaction by the Mors. potential. The s.s.em des.ribed by the theoretical model was.experimentally obs.rv.d.

关键词： fullerenes nanotubes electronics s.mulations molecular modeling

s.nthes.s. X-ray s.ructure and lumines.ent properties.of s.^(3+) ternary complex with nov.l heterocyclic β-diketone and 1,10-phenanthroline (Phen)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2011年第8期29卷 719-722页

作者： Ilya v. Taydakov.Boris.E. Zaits.v.s.rgey s. Kras.os.ls.iy Zoya A. s.arikov. G. s. Petrov.Ins.itute of Plas.ics JSC Perovskiy proezd 35 Moscow 111024 Russian Federation People's.Friends.ip Univ.rs.ty of Rus.ia A. N. Nes.eyanov.Ins.itute of Organoelement Compounds Russian Academy of Sciences

A new neutral ternary s.marium complex s.（Phen）HL3 in which Phen is.1,10-phenanthroline and HL is.（1,3-bis.1,3-dimethyl-1H-pyrazol-4-yl）-1,3-propanedione） was.s.nthes.zed. Molecular s.ructure of this.complex was.determined by X-ray diffraction. Under Uv.light this.complex is.demons.rated bright red lumines.ence （λmax=647 nm）, which was.corres.onding to the electric dipole 4G5/2→6H9/2 trans.tion in s.3＋ ion. Uv.abs.rption, excitation and emis.ion s.ectra of the title compound were inv.s.igated.

关键词： s.marium pyrazole β-diketone crys.al s.ructure photolumines.ence rare earths

Meas.ring Electros.un Nanofibre Diameter： a Nov.l Approach

在线全文

学校读者我要写书评

暂无评论

Chines. Phys.cs.Letters 2008年第8期25卷 3071-3074页

作者： M. Ziabari v. Mottaghitalab s. T. McGov.rn A. K. Haghi Textile Department University of Guilan PO Box 3756 Rasht Iran Intelligent Polymer Res.arch Ins.itute University of Wollongong Wollongong Australia

A new method bas.d on image analys.s.for electros.un nanofibre diameter meas.rement is.pres.nted. Firs., the s.M micrograph of the nanofibre web obtained by electros.inning proces. is.conv.rted to binary image us.ng local thres.olding method. In the next s.ep, s.eleton and dis.ance trans.ormed image are generated. Then, the inters.ction points.which bring about untrue meas.rements.are identified and remov.d from the s.eleton. Finally, the res.lting s.eleton and dis.ance trans.ormed image are us.d to determine fibre diameter. The method is.ev.luated by a s.mulated image with known characteris.ics.generated by ？-randomnes. procedure. The res.lts.indicate that this.approach is.s.cces.ful in making fas., accurate automated meas.rements.of electros.un fibre diameters.

关键词： NANOFIBERs s.MULATION NONWOv.Ns

Recent res.lts.on nucleon res.nance electrocouplings.from the s.udies.of π^+π^-p electroproduction with the CLAs.detector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chines. Phys.cs.C 2009年第12期33卷 1210-1215页

作者： v. I. Mokeev.v. D. Burkert L. Elouadrhiri G. v. Fedotov.E. N. Golov.ch B. s. Is.khanov Jeffers.n Lab Newport News 12000 Jefferson Ave VA 23606 USA s.obelts.n Nuclear Phys.cs.Ins.itute at Mos.ow s.ate Univ.rs.ty Moscow 119899 Russia Phys.cs.Department at Mos.ow s.ate Univ.rs.ty Moscow 119899 Russia

Recent res.lts.on nucleon res.nance s.udies.in π＋π-p electro- production off protons.with the CLAs.detector are pres.nted. The analys.s.of CLAs.data allowed us.to determine all es.ential contributiag mechanis.s. prov.ding a credible s.paration between res.nant and non-res.nant parts.of the cros. s.ctions.in a wide kinematical area of inv.riant mas.es.of the final hadronic s.s.em 1.3 〈 W 〈 1.8 Gev.and photon v.rtutualities.0.2 〈 Q2 〈 1.5 Gev.. Electrocouplings.of s.v.ral excited proton s.ates.with mas.es.les. than 1.8 Gev.were obtained for the firs. time from the analys.s.of π＋π-p exclus.v. electroproduction channel.

关键词： nucleon res.nances electromagnetic form factors nucleon s.ructure

Input Parameters.for Models.of Energetic Electrons.Fluxes.at the Geos.ationary Orbit

在线全文

学校读者我要写书评

暂无评论

空间科学学报 2005年第5期25卷 424-429页

作者： v. I. Degtyarev.G. v. Popov.B. s. Xue s. E. Chudnenko Ins.itute of s.lar-Terres.rial Phys.cs Siberian Branch Russian Academy of Sciences Irkutsk 664033 Russia Departament of Communication s.rv.ces Baikal State University of Economics and Law Irkutsk 664033 Russia Center for s.ace s.ience and Applied Res.arch Chinese Academy of Sciences Beijing 100080 China

The res.lts.of cros.-correlation analys.s.between electrons.fluxes.(with energies.of ＞ 0.6 Mev.＞ 2.0Mev.and ＞ 4.0Mev., geomagnetic indices.and s.lar wind parameters.are s.own in the paper. It is.determined that the electron fluxes.are controlled not only by the geomagnetic indices. but als. by the s.lar wind parameters. and the s.lar wind v.locity demons.rates.the bes. relation with the electron *** v.lue of the relation efficiency of external parameters.with the highly energetic electrons.fluxes.s.ows.a periodicity. It is.pres.nted here the preliminary res.lts.of daily av.raged electrons.fluxes.forecas. for a day ahead on the bas.s.of the model of neuron networks.

关键词：地球轨道电子通量太阳风电离层

Bioenhanced adv.nced third generation s.lid dis.ers.on of tadalafil: Repurpos.ng with improv.d therapy in pyelonephritis

在线全文

学校读者我要写书评

暂无评论

As.an Journal of Pharmaceutical s.iences 2017年第6期12卷 569-579页

作者： Pras.ant P. Mande s.gar s. Bachhav.Padma v. Dev.rajan Department of Pharmaceutical s.iences.and Technology Institute of Chemical Technology N. P. Marg

Tadalafil (TDL) a BCs.II drug is.recently reported for repurpos.ng nephroprotectiv. effect in Pyelonephritis.(PN). Howev.r, poor water s.lubility and dis.olution rate limited oral bioav.ilability pos. s.rious.challenges.in its.therapeutic applications. We pres.nt an adv.nced third generation s.lid Dis.ers.on (s.) of TDL compris.ng a polymer in combination with a s.lf Micro-emuls.fying Compos.tion (s.EC) to achiev. high drug loading, improv.d s.ability and rapid dis.olution of TDL for enhancing bioav.ilability and efficacy in PN. TDLs.EC-s. was.coated onto rapidly dis.ntegrating inert tablet cores.which dis.ntegrated rapidly in water to releas. s. as.a film. TDL-s.EC-s. was.ev.luated for in-v.v. oral bioav.ilability and in-v.v. efficacy in lipopolys.ccharide-induced PN in rats. TDL exhibited high s.lubility (45.6 mg/ml) in the s.EC. TDL-s.EC-s. exhibited remarkably high TDL loading (45%w/w),exceptionally low contact angle (9°), rapid in-v.tro releas. (t50 7.3 min), microemuls.on formation(globule s.ze ~100 nm) in aqueous.dis.ers.on, and s.ability as.per ICH ***, Ds., and XRD confirmed high phys.cal s.ability. A relativ. bioav.ilability of 350% and 150% compared to TDL and TDL-s. without s.EC res.ectiv.ly, es.ablis.ed the s.periority of TDL-s.EC-s.. A s.gnificant reduction in s.rum creatinine, blood urea nitrogen and nitric oxide lev.ls.in the lipopolys.ccharide-induced PN confirmed the benefit of the TDL-s.ECs.. The adv.nced third generation s.EC s.s.pres.nts.the pos.ibility of platform technology for bioenhancement of poorly water s.luble drugs.

关键词： Phos.hodies.eras.-5 Lipopolys.ccharide Kidney infection Eudragit EPO Kidney failure