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世界核心医学期刊文摘（儿科学分册） 2006年第9期2卷 45-46页

作者： Borsellino a. Za.ca.a.a. nahom a. 李丹 Depa.tment of Medica. a.d Surgica. Neona.ology Bambino Gesù Children's HospitalPiazza S. Onofrio 400165 RomeItaly

Ba.kground/Purpose:Technica. refinements a.d increa.ingly sophistica.ed equipment ha.e led to higher sensitivity in prena.a. dia.nosis of congenita. ma.forma.ions; however,such progress ma. be a.compa.ied by decrea.ed specificity. The a.m of this study is to eva.ua.e evolution of prena.a. dia.nosis from the first sonogra.hic suspicion of feta. a.oma.y until a.ter delivery (dia.nosis confirmed,resolution before birth,hea.thy ba.y,or a.fected with different disorder) to document ra.e of fa.se-positive (FP) results. Methods:Retrospective review of prena.a. ultra.ound exa.ina.ions performed a. our institution between 2000 a.d 2002 wa. conducted. The series includes pregna.cies referred to our depa.tment a.ter detection of thora.ic a.d a.domina. a.oma.ies a. routine obstetrica. sonogra.hy a.d with a.follow-up comprising a. lea.t the first 6 months of life. Urologic ma.forma.ions were excluded. Those fetuses who proved hea.thy a. birth were considered FP results. Results:One hundred fifty-seven fetuses/neona.es underwent complete follow-up. Prena.a. dia.nosis of esopha.ea. a.resia.resulted in 3 (27% ) of 11 FPs. Finding of dila.ed bowel,isola.ed or a.socia.ed with hyperechogenicity or a.cites,wa. not predictive of sma.l bowel obstruction in 7 (41% ) of 17 fetuses. No FPs were found with rega.d to a.domina. wa.l defects (8 ga.troschisis a.d 26 ompha.oceles,a.l confirmed a. birth). Concerning thora.ic ma.forma.ions,no FPs were seen a.ong the 28 ca.es of congenita. dia.hra.ma.ic hernia.wherea. dia.nosis of lung ma.forma.ion presented a.specificity of 97% (1/28 FP). Ova.ia. cysts a.counted for a. FP ra.e of 17% (4/23 FPs). Overa.l,a.percenta.e of FP of 12% (6/50) wa. seen in 2000,of 11% (5/44) in 2001,a.d 9% (6/63) in 2002,with no sta.istica.ly significa.t difference. Conclusions:Beca.se of the high FP ra.e rega.ding some pa.ticula. a.oma.ies,unnecessa.y psychologica. burden to prospective pa.ents ma. ensue. This issue should be dea.t with in future prospective studies.

关键词：产前诊断假阳性产前超声检查产科超声检查正常胎儿先天性膈疝肺发育不良食管闭锁小肠梗阻

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Synthesis of Porphyrin-a.pended Pyridine a. a.Fluorescent Chemosensor for Cd（Ⅱ） a.d Hg（Ⅱ）

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Journa. of Chemistry a.d Chemica. Engineering 2010年第10期4卷 56-61页

作者： nahom Piya.a. Yoosrija.oen Wa.a.a. Pa.pa. Komva.a. Depa.tment of Chemistry Faculty of Science King Mongkut＇s University of Technology Thonburi Bangkok 10149 Thailand

In this resea.ch, specific molecula. sensors a.e cla.sified a.cording to the type of receptor-ca.ion intera.tion, tha. is liga.d-meta. intera.tions. Receptors a.e ba.ed on a.multidenta.e protoporphyrin-a.pended pyridine pla.form, which lea.es a. lea.t a.va.a.t coordina.ion site for the incoming meta. ions. a.protoporphyrin-a.pended pyridine, 2,5-pyridine dica.boxya.idyl-8,13-bis（vinyl）-3,7,18,17-tetra.ethyl-21 H, 23 H-porphyrin（P-PTP）, wa. designed a.d synthesized. Its a.plica.ion a. potentia. fluoroionophore for recognition of ca.mium a.d mercury ions is reported. P-PTP shows chela.ion-enha.ced fluorescence effect with Cd（Ⅱ） a.d Hg（Ⅱ） via.the interruption of photoinduced electron tra.sfer （PET） process, which ha. been utilized a. the ba.is of the fa.rica.ion of the meta. ions-sensitive fluorescent chemosensor. The a.a.ytica. performa.ce cha.a.teristics of the proposed Cd（Ⅱ）- a.d Hg（Ⅱ）- sensitive chemosensors were investiga.ed. It shows a.linea. response towa.d Cd（Ⅱ） a.d Hg（Ⅱ） in the concentra.ion ra.ge of 1.0×10-3 to 1.0×10-7 M with a.limit of detection of 1.0×10-7 M a.d 0.5×10-7M for Cd（Ⅱ） a.d Hg（Ⅱ）, respectively. The chemosensor shows good selectivity for Cd（Ⅱ） over a.la.ge number of other tra.sition meta. ions, i.e., Cu（Ⅱ）, Zn（Ⅱ） a.d mixed meta. ions.

关键词： Fluorescence chemosensor protoporphyrin pyridine deriva.ives ca.mium ions mercury ions.

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Numerica. Ca.cula.ions for a.Bounda.y La.er Flow pa.t a.Moving Vertica. Porous Pla.e with Suction/Injection a.d Therma. Ra.ia.ion

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a.plied Ma.hema.ics 2020年第3期11卷 172-183页

作者： Okey Oseloka.Onyejekwe Yoha.nes Demiss Belete nahom a.emseged Worku Computa.iona. Mecha.ics a.d Dyna.ics Systems Group Computational Science Program Addis Ababa University Arat Kilo Campus Addis Ababa Ethiopia

The work presented herein investiga.es the velocity, hea. tra.sfer, Nusselt number a.d skin friction profiles involved in bounda.y la.er flow pa.t a.moving vertica. porous pla.e. Simila.ity tra.sforma.ions a.e employed to convert the governing nonlinea. unstea.y momentum a.d energy equa.ions from their pa.tia. differentia. equa.ion forms to bounda.y va.ue ordina.y differentia. equa.ions. The resulting equa.ions a.e then solved numerica.ly by the Runge-Kutta.fourth order method with the help of a.shooting technique. Severa. fea.ures of the flow a.d hea. tra.sfer cha.a.teristics for different va.ues of problem pa.a.eters a.e a.a.yzed a.d discussed. These include the effects of the ra.ia.ion pa.a.eter (R), suction a.d injection pa.a.eter (c), Gra.hof (Gr) a.d Pra.dtl (Pr) numbers on the flow a.d hea. profiles. Numerica. results show the impa.t of blowing a.d sucking a. well a. ra.a.ion on bounda.y la.er flows of this type. Both the skin frictions a. well a. the hea. tra.sfer ra.e a.e a.so significa.tly rela.ed to the ra.ia.ion pa.a.eter. For a.l these ca.es;the numerica. results a.e found to be in a.reement with the physics of the problem.

关键词： Momentum a.d Energy Gra.hof Number Pra.dtl Number Simila.ity Tra.sforma.ion Ra.ia.ion Pa.a.eter Suction Blowing Ra.ia.ion Po-rous Pla.e

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Investiga.ion of the Physico-Chemica. Sta.da.ds of the Ground Wa.ers a.ound Ma.-Bella.a.ea.in a.ma.a

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Journa. of Geoscience a.d Environment Protection 2019年第9期7卷 148-161页

作者： Goitom Kfle Mussie Sium a.umuga. Ma.oha. Semere Debretsion a.on Tesfa.a.ia. nahom Tesfa.em a.el Okba.ela.ie Kibrom Tesfa. Depa.tment of Chemistry College of Science Eritrea Institute of Technology Asmara Eritrea SGS Mineral Assay Laboratory Bisha Mining Share Company Asmara Eritrea

There a.e ma.y possible sources of ground wa.er conta.ina.ion a.d ma. include wa.tes from industria. chemica. production, domestic wa.tewa.er a.d pesticide run off from a.ricultura. la.ds. The groundwa.er is thus susceptible to chemica., physica. a.d/or microbiologica. conta.ina.ion a.d ultima.ely becomes a.ca.se for diverse disea.es borne from the conta.ina.ed wa.er. It ha. been a.common pra.tice to cultiva.e vegeta.les, crops a.d a.ima. feed gra.ses a.ound a.ma.a.using sewa.e a.d industria. effluents a.d there a.e likelihoods tha. conta.ina.ts in the wa.tewa.er used for irriga.ion would infiltra.e to the nea.by wells. It is believed tha. the groundwa.er a.ound the wa.tewa.er irriga.ed a.ea.is not sa.e for domestic a.d a.ricultura. a.plica.ions. Thus, this study wa. conducted to eva.ua.e the qua.ity of the groundwa.er in order to sa.egua.d the public hea.th trea.s ca.sed by using this wa.er. Sa.ples were collected from five loca.ions a.ound Ma.-Bella.a.d thus different physico-chemica. pa.a.eters were investiga.ed. The pH of the sa.ples wa. mea.ured by pH metric method;electrica. conductivity (EC) a.d sa.inity by using conductometric method. Ha.dness wa. estima.ed by EDTa.method;tota. a.ka.inity (Ta. a.d bica.bona.e concentra.ions by titrimetric methods. Chloride concentra.ion wa. a.a.yzed by titra.ion a.a.nst mercuria. nitra.e. Na.a.d K were determined using fla.e photometric method. Fe, Mn, nitra.e, nitrite, sulpha.es a.d a.monia.were determined using spectrophotometric method. Chemica. Oxygen Dema.d (COD) wa. determined using photometric method. Moreover, the concentra.ions of tra.e, ma.or a.d hea.y meta.s were a.a.ysed using Inductively Coupled Pla.ma.Optica. Emission Spectrophotometer (ICP-OES). The suita.ility of the groundwa.er for domestic a.d irriga.ion purposes wa. exa.ined using WHO a.d Fa. sta.da.ds. Most of the physico-chemica. pa.a.eters, except the tempera.ure, pH, COD, a., Cd, Cr, Cu a.d Zn, of the sa.ples were found a.ove the sta.da.d limits given

关键词： Ma.-Bella Groundwa.er Physico-Chemica. Hea.y Meta.s

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Numerica. Discrete-Doma.n Integra. Formula.ions for Genera.ized Burger-Fisher Equa.ion

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a.plied Ma.hema.ics 2020年第3期11卷 137-145页

作者： Okey Oseloka.Onyejekwe Beruk Mina.e Fikru Ha.ta.u Tesfa.e a.ha.Getenet Ta.iru Bethelhem Mengistu Yoha.ess Demiss nahom a.emseged Computa.iona. Science a.d Dyna.ics Systems Group Computa.iona. Science Progra. Addis Ababa University Arat-Kilo Campus Addis Ababa Ethiopia

In this study we use a.bounda.y integra. element-ba.ed numerica. technique to solve the genera.ized Burger-Fisher equa.ion. The essentia. fea.ure of this method is the funda.enta. integra. representa.ion of the solution inside the problem doma.n by mea.s of both the bounda.y a.d doma.n va.ues. The occurrences of doma.n integra.s within the problem a.ising from nonlinea.ity a. well a. the tempora. deriva.ive a.e not a.oided or tra.sferred to the bounda.y. However, unlike the cla.sica. bounda.y element a.proa.h, they a.e resolved within a.finite-element-type discrete doma.n. The utility a.d correctness of this formula.ion a.e proved by compa.ing the results obta.ned herein with closed form solutions.

关键词： Burger-Fisher Equa.ion Doma.n Integra.s Bounda.y Element Finite-Element-Type Discrete Doma.n Bounda.y Integra. Numerica. Nonlinea.ity

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Triphenylmetha.ol a.d Tris(2-(hydroxymethyl)phenol) Deriva.ives: Synthesis a.d a.plica.ion a. Indica.ors for a.id-Ba.e Volumetric Titra.ion

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Journa. of a.a.ytica. Sciences, Methods a.d Instrumenta.ion 2019年第2期9卷 13-21页

作者： Rya. Beni Willia. Boa.i Ja.za. a.na.hli Sa.iya. a.ha.ed Tiffa.y Robinson Mela.ie Mootry nahom Iyob Ja.ill Ja.kson Na.a.ie Spicer a.terria. Ha.ris Ibra.im Ba.ida. Renner a.twi Sha.ia.Richa.dson Tra.ynn Willia.s Depa.tment of Chemistry Tennessee State University Nashville TN USA Depa.tment of Chemistry Columbus State University Columbus GA USA

Polyphenols a.e na.ura.ly occurring compounds found la.gely in fruits, vegeta.les, cerea.s a.d bevera.es. Currently, there is much interest in the potentia. hea.th benefits of dieta.y pla.t polyphenols a. a.tioxida.ts. The effect of polyphenols on huma. ca.cer cells is most often protective a.d induces a.reduction in the number of tumors or ra.e of growth. During our course of study on a.tica.cer prodrugs, twelve triphenylmetha.ol a.d one tris(2-(hydroxymethyl) phenol deriva.ives were synthesized a. a.ca.rier of severa. drugs with optimized lipophilicity. Besides a.plica.ion of these compounds a. a.founda.ion for a.tica.cer drug delivery systems, these compounds were eva.ua.ed a. indica.ors for the a.id-ba.e volumetric titra.ion of a.sta.da.d solution of hydrochloric a.id with a.sta.da.d solution of sodium hydroxide. The experiments indica.ed a.modera.e-to-sha.p color tra.sition of the solutions nea. the neutra.iza.ion point for most indica.ors. These indica.ors ma. ha.e potentia. a.plica.ions for a.id-ba.e titra.ions in a.na.row ra.ge.

关键词： Polyphenols Triphenylmetha.ol a.id-Ba.e Indica.ors Volumetric Titra.ion Neutra.iza.ion

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