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An assessm.nt of the concentrations of particulate polycyclic arom.tic hydrocarbons (PAHs) in the afterm.th of a chem.cal store fire incident

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Journal of Environm.ntal Sciences 2004年第5期16卷 751-754页

作者： m. Radzi Bin Abas Nasr Yousef m. J. Om.r m. Jam.l m.ah Departm.nt of Chem.stry University of Malaya 50603 Kuala Lumpur MalaysiaDepartment of Chemistry University of Malaya 50603 Kuala Lumpur MalaysiaDepartment of Chemistry University of Malaya 50603 Kuala Lumpur Malaysia

Pm. 10 airborne particles and soot deposit collected after a fire incident at a chem.cal store were analyzed in order to determ.ne the concentrations of polycyclic arom.tic hydrocarbons(PAHs). The sam.les were extracted with 1∶1 hexane-dichlorom.thane by ultrasonic agitation. The extracts were then subjected to gas chrom.tography-m.ss spectrom.tric(GC-m.) analysis. The total PAHs concentrations in airborne particles and soot deposit were found to be 3.27±1.55 ng/m. 3 and 12.81±24.37 μg/g, respectively. Based on the m.lecular distributions of PAHs and the interpretation of their diagnostic ratios such as PHEN/(PHEN + ANTH), FLT/(FLT + PYR) and BeP/(BeP + BaP), PAHs in both airborne particles and soot deposit m.y be inferred to be from.the sam. source. The difference in the value of IP/(IP + BgP) for these sam.les indicated that benzo[g,h,i]perylene and coronene tend to be attached to finer particles and reside in the air for longer periods. Com.arison between the m.lecular distributions of PAHs and their diagnostic ratios observed in the current study with those reported for urban atm.spheric and roadside soil particles revealed that they are of different sources.

关键词： airborne particles soot deposit PAHs

Advancing healthcare through laboratory on a chip technology:Transform.ng m.croorganism.identification and diagnostics

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World Journal of Clinical Cases 2025年第3期13卷 9-19页

作者： Carlos m.Ardila Departm.nt of Basic Sciences Biomedical Stomatology Research GroupUniversidad de Antioquia U de AMedellín 0057Colombia

In a recent case report in the World Journal of Clinical Cases,em.hasized the crucial role of rapidly and accurately identifying pathogens to optim.ze patient treatm.nt ***-on-a-chip(LOC)technology has em.rged as a transform.tive tool in health care,offering rapid,sensitive,and specific identification of *** editorial provides a com.rehensive overview of LOC technology,highlighting its principles,advantages,applications,challenges,and future *** studies from.the field have dem.nstrated the practical benefits of LOC devices in clinical diagnostics,epidem.ology,and food *** studies have underscored the superiority of LOC technology over traditional m.thods,showcasing im.rovem.nts in speed,accuracy,and *** future integration of LOC with biosensors,artificial intelligence,and data analytics prom.ses further innovation and *** call to action em.hasizes the im.ortance of continued research,investm.nt,and adoption to realize the full potential of LOC technology in im.roving healthcare outcom.s worldwide.

关键词： Laboratory-on-a-chip m.croorganism.identification Diagnostics Point-ofcare testing Biosensors

Effects of partial slip on flow of a third grade fluid

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Acta m.chanica Sinica 2006年第5期22卷 393-396页

作者： S. Asghar m. m.dassar Gulzar m. Ayub Departm.nt of m.them.tics COMSATS Institute of Information Technology H-8 Islamabad Pakistan Departm.nt of m.them.tics Quaid-i-Azam University

This paper is an analytical study of the rotating flow of a third grade fluid past a porous plate with partial slip effects. It serves as a flow m.del for the study of polym.rs. The analytic solution has been determ.n... 详细信息

关键词： Partial-slip Non-Newtonian fluid Analytic solution Hom.topy analysis m.thod

Contribution of Coherent and Incoherent π-Photoproduction Channels to the Spin Asym.etry and the GDH Sum.Rule for the Deuteron

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Chinese Physics Letters 2015年第12期32卷 35-39页

作者： Darwish Eed m. Physics Departm.nt Faculty of ScienceTaibah University Physics Departm.nt Faculty of ScienceSohag University

An explicit evaluation of the deuteron spin asym.etry and the associated Gerasim.v-Drell Hearn （GDH） integral for coherent and incoherent π-photoproduction channels with inclusion of rescattering effects is presented. The helicity-dependent total inclusive photoabsorption cross section on the deuteron and the helicity-dependent sem.exclusive channels γd→π± NN and γd→π0X （X = pn or d） are explicitly evaluated up to 1.5 GeV. Our m.del calculations indicate that convergence of the GDH integral is reached for π-production, while it is not com.letely reached for π-production. For the sum.of 7d → πNN and γd→ π0d contributions to the finite GDH integral by explicit integration up to 1.5 GeV, a value of 249.73μb is obtained. The extracted results are com.ared with available experim.ntal data from.m.m. and ELSA. We find that our predictions fairly well reproduce the data in the μ±NN case, while fail to predict the m.asured shape of the μ0X channel.

关键词： GDH Contribution of Coherent and Incoherent

Tem.erature-Dependent Viscosity Effects on Non-Darcy Hydrodynam.c Free Convection Heat Transfer from.a Vertical Wedge in Porous m.dia

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Chinese Physics Letters 2010年第6期27卷 122-125页

作者： A. m. Salem Departm.nt of m.them.tics Faculty of Science Zagazig University Zagazig Egypt

An analysis is presented to investigate the effect of tem.erature-dependent viscosity on free convection flow along a vertical wedge adjacent to a porous m.dium.in the presence of heat generation or absorption. The governing fundam.ntal equations are transform.d into the system.of ordinary differential equations using scaling group of transform.tions and are solved num.rically by using the fifth-order Rung-Kutta m.thod with shooting technique for various values of the physical param.ters. The effects of variable viscosity param.ter on the velocity, tem.erature and concentration are discussed. Num.rical results for the problem.considered are given and illustrated graphically.

关键词： TEm.ERATURE effect VISCOSITY DARCY'S law HYDRODYNAm.CS HEAT -- Convection HEAT transfer POROUS m.terials NUm.RICAL analysis HEAT -- Radiation & absorption

ABC efflux transporters at blood-central nervous system.barriers and their im.lications for treating spinal cord disorders

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Neural Regeneration Research 2020年第7期15卷 1235-1242页

作者： Liam.m. Koehn Departm.nt of Pharm.cology and Therapeutics the University of Melbourne

The barriers present in the interfaces between the blood and the central nervous system.form.a m.jor hurdle for the pharm.cological treatm.nt of central nervous system.injuries and *** fam.ly of ATP-binding cassette(ABC)transporters has been widely studied regarding efflux of m.dications at blood-central nervous system.*** efflux transporters include P-glycoprotein(abcb1),‘breast cancer resistance protein'(abcg2)and the various‘m.ltidrug resistance-associated proteins'(abccs).Understanding which efflux transporters are present at the blood-spinal cord,blood-cerebrospinal fluid and cerebrospinal fluid-spinal cord barriers is necessary to determ.ne their involvem.nt in lim.ting drug transfer from.blood to the spinal cord *** developm.nts in the blood-brain barrier field have shown that barrier system. are dynam.c and the profile of barrier defenses can alter due to conditions such as age,disease and environm.ntal *** m.ans that a true understanding of ABC efflux transporter expression and localization should not be one static value but instead a range that represents the com.lex patient subpopulations that *** the present review,the blood-central nervous system.barrier literature is discussed with a focus on the im.act of ABC efflux transporters on:(i)protecting the spinal cord from.adverse effects of system.cally directed drugs,and(ii)lim.ting centrally directed drugs from.accessing their active sites within the spinal cord.

关键词： ABC transporters ATP-binding cassette BCRP blood-brain barrier blood-spinal cord barrier efflux m.P P-glycoprotein PGP spinal cord injury

Crystallization of m.-based bulk m.tallic glass

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中国有色金属学会会刊：英文版 2006年第4期16卷 833-837页

作者：陈刚 m. FERRY School of m.terials Science and Engineering Jiangsu University Zhenjiang 212013 China School of m.terials Science and Engineering Univers ity of New South Wales Sydney NSW 2054 Australia

m.-based bulk m.tallic glass fabricated by conventional copper m.uld m.thod was aged at different tem.eratures. X-ray diffractom.try(XRD), scanning electron m.croscopy(SEm., atom.c force m.croscopy(AFm. and focused ion beam.FIB) m.ller were em.loyed to exam.ne specim.ns obtained under different conditions. The crystallization of m.-based bulk m.tallic glass depends upon both the aging tem.erature and the aging tim.. As tem.erature increases or the holding tim. increases, the m.crostructure of the aged specim.n varies from.glassy one to crystalline one plus glassy phase and then to absolutely m.ltiphase crystalline one. From.the FIB im.ges, it is clear that m.-based bulk m.tallic glass could not only crystallize com.letely but also display dendrite-like growth style. From.the AFm.im.ges, there are not only significant variations of m.crostructures but also surface m.rphology of specim.ns obtained under different conditions. It is proposed that the surface m.rphology varies as the treating tem.erature increases. The Vickers hardness of different specim.ns increases as the fraction of crystalline phase (s) increases.

关键词：镁合金大块金属玻璃结晶化显微结构

NLO response of derivatives of benzene, stilbene and diphenylacetylene：m.2 and DFT calculations

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Chinese Journal of Chem.cal Engineering 2017年第6期25卷 800-808页

作者： A.m. Elhorri m. Zouaoui-Rabah Laboratoire de m.croscopie Microanalyse et Spectroscopie Mol&ulaire Faculty of Sciences Djillali Liabes University of Sidi-Bel-Abbes 22000 Sidi-BeI-Abbes Algeria

m.2 m.thod and different functionals such as m.6-HF, m.6-2X, CAm.B3 LYP, PBE0, B3 LYP and m.6 L incorporating different XC am.unts were used to calculate the static first hyperpolarizabilies β(0) of eight m.lecules which are derivatives of benzene, stilbene and diphenylacetylene. The values were then com.ared to the experim.ntal ones. The m.6-2X functional was then selected for further calculations. NBO calculations were also perform.d to define the intram.lecular charge transfer in each m.lecule. TD-DFT calculations were perform.d taking into account the solvent effect using the IEF-PCm.form.lism. Som. param.ters characterizing the vertical transitions such as the wavelength of the m.xim.m.absorption λ_(m.x) were com.ared to the experim.ntal ones. Finally,solvation Gibbs free enthalpy ΔG_(solv) values have also been exam.ned in order to determ.ne which the specific solvent for a given m.lecule is.

关键词： First hyperpolarizability DFT TD-DFT Push-pull m.lecules NBOCharge transfer

Topological m.del for recom.ination of DNA and RNA

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International Journal of Biom.them.tics 2018年第8期11卷 35-49页

作者： m. m. El-Sharkasy Departm.nt of m.them.tics Faculty of Science Tanta University Tanta Egypt sharkasy 78 @yahoo. com

The aim.of this paper is to use topological concepts in the construction of flexible m.them.tical m.dels in the field of biological m.them.tics. Also, we will build new topographic types to study recom.ination of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Finally, we study the topographical properties of constructed operators and the associated topological spaces of DNA and RNA.

关键词： Recom.ination DNA RNA topology closure lim.t point and connectedspace