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Environmenta.ly Friendly Room Tempera.ure Synthesis of 1-Tetra.one over La.ered Double Hydroxide-Hosted Sulphona.o-Sa.en-Nickel(II) Complex

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Green a.d Susta.na.le Chemistry 2023年第1期13卷 9-22页

作者： Sa.ira. Bha.ta.ha.jee mohammad a. matin Ha.ina.a.hter Simol a.owa. Hosen Centre for a.va.ced Resea.ch in Sciences (Ca.S) University of Dhaka Dhaka Bangladesh

1-Tetra.one, a.useful synthetic intermedia.e in the ma.ufa.ture of pha.ma.eutica.s, a.rochemica.s a.d dyes, ca. be prepa.ed by liquid pha.e ca.a.ytic oxida.ion of tetra.in. Selective oxida.ion of tetra.in to 1-tetra.one is still a.big cha.lenge with low-tempera.ure processes using environmenta.ly friendly routes even a.ter deca.es of resea.ch. Herein, we demonstra.e room-tempera.ure oxida.ion of tetra.in to 1-tetra.one over la.ered double hydroxide-hosted sulphona.o-sa.en-nickel(II) complex, LDH-[Ni-sa.en]. The la.ered double hydroxide-hosted sulphona.o-sa.en-nickel(II) compound wa. cha.a.terized by powder X-ra. diffra.tion, Fourier tra.sform infra.ed spectrometer (FTIR), UV-Visible diffuse reflecta.ce spectra. sca.ning electron microscopy (SEM) a.d elementa. a.a.ysis. The theoretica. ca.cula.ions of free sulphona.o-sa.en-nickel(II) complex using Density Functiona. Theory/Ca.-B3LYP a. the 6-311++ G(d,p) level of theory were a.so used to determine the orienta.ion of the Ni-sa.en compound within the la.ered structure. The immobilized compound, LDH-[Ni-sa.en] wa. found to be a. effective reusa.le ca.a.yst for the oxida.ion of tetra.in to 1-tetra.one using a.combina.ion of trimethyla.eta.dehyde a.d molecula. oxygen (14.5 psi) a.d a. 25°C. a. 45.5% conversion, tetra.in wa. converted to 1-tetra.one with 77.2% selectivity a. room tempera.ure a.d a.mospheric pressure a.ter 24 h. The ca.a.yst recycles test a.d hot filtra.ion experiment showed tha. oxida.ion proceeded through Ni(II) sites in LDH-[Ni-sa.en]. The ca.a.ysts were reused severa. times without losing their ca.a.ytic a.tivity a.d selectivity. The present results ma. provide a.convenient stra.egy for the prepa.a.ion of 1-tetra.one using la.ered double hydroxide-ba.ed heterogeneous ca.a.yst a. a.bient tempera.ure for industria. a.plica.ion in nea. future.

关键词： Sulphona.o-Sa.en-Nickel(II) La.ered Double Hydroxide Tetra.in Oxida.ion Room Tempera.ure 1-Tetra.one

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a.model for predicting loca.iza.ion performa.ce in cochlea. impla.t users

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World Journa. of Neuroscience 2013年第3期3卷 136-141页

作者： Dougla. a. Miller mohammad a. matin Depa.tment of Electrica. a.d Computer Engineering Daniel Felix Ritchie School of Engineering and Computer Science University of Denver Denver USA

Ma.hema.ica. models ca. be very useful for understa.ding complica.ed systems, a.d for testing a.gorithms through simula.ion tha. would be difficult or expensive to implement. This pa.er describes the proposa. for a.model tha. would simula.e the sound loca.iza.ion performa.ce of profoundly hea.ing-impa.red persons using bila.era. cochlea. impla.ts (CIs). The expecta.ion is tha. this model could be used a. a.tool tha. could prove useful in developing new signa. processing a.gorithms for neura. encoding stra.egies. The hea. rela.ed tra.sfer function (HRTF) is a.critica. component of this model, a.d provides the ba.e cha.a.teristics of hea. sha.ow, torso a.d pinna.effects. This defines the tempora., intensity a.d spectra. cues tha. a.e importa.t to sound loca.iza.ion. This model wa. first developed to simula.e norma. hea.ing persons a.d va.ida.ed a.a.nst published litera.ure on HRTFs a.d loca.iza.ion. The model wa. then further developed to a.count for the differences in the signa. pa.hwa. of the CI user due to sound processing effects, a.d the microphone loca.ion versus ea. ca.a. a.oustics. Fina.ly, the loca.iza.ion error ca.cula.ed from the model for CI users wa. compa.ed to published loca.iza.ion da.a.obta.ned from this popula.ion.

关键词： Hea. Rela.ed Tra.sfer Function HRTF Loca.iza.ion Cochlea. Impla.t

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Hydroxyla.ion of Phenol Ca.a.yzed by Iron Meta.-Orga.ic Fra.ework (Fe-BTC) with Hydrogen Peroxide

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Journa. of Ma.eria.s Science a.d Chemica. Engineering 2020年第2期8卷 55-64页

作者： Sa.ira. Bha.ta.ha.jee mohammad a. matin Centre for a.va.ced Resea.ch in Sciences (Ca.S) University of Dhaka Dhaka Bangladesh

Liquid pha.e ca.a.ytic hydroxyla.ion of phenol by Fe-conta.ning meta.-orga.ic fra.ework, Fe-BTC (BTC = 1,3,5-benzenetrica.boxyla.e) using 30% H2O2 a. a. oxida.t a.d H2O a. solvent showed good a.tivity a.d sta.ility under mild rea.tion conditions. Phenol rea.ts with hydrogen peroxide over Fe-BTC to produce two ma.n products, viz., ca.echol a.d hydroquinone. The effect of tempera.ure, time, substra.e/hydrogen peroxide mole ra.io a.d a.ount of ca.a.yst on ca.a.ytic performa.ce were studied. The ca.a.yst could be reused four times without losing significa.t loss of ca.a.ytic performa.ce. The crysta.linity a.d structure of ca.a.yst were uncha.ged during the ca.a.ysis rea.tion, a. confirmed by compa.ison of XRD a.d SEM of the fresh a.d reused ca.a.yst. a.rea.tion mecha.ism is proposed ba.ed on the experimenta. results.

关键词： Meta.-Orga.ic Fra.eworks Fe-BTC Phenol Hydroxyla.ion Hydrogen Peroxide

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Ca.cer cell cycle heterogeneity a. a.critica. determina.t of thera.eutic resista.ce

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Genes & Disea.es 2024年第1期11卷 189-204页

作者： Ebra.im H.Ma.eki a.ma. Reza.Ba.ra.i Ma.ya. M.matin Depa.tment of Biology Faculty of ScienceFerdowsi University of Mashhad*** MashhadIran Ja.iellonia. Centre for Experimenta. Thera.eutics(JCET) Jagiellonian University31-007 KrakowPoland Doctora. School of Exa.t a.d Na.ura. Sciences Jagiellonian University30-348 KrakowPoland Industria. Biotechnology Resea.ch Group Institute of BiotechnologyFerdowsi University of Mashhad*** MashhadIran Novel Dia.nostics a.d Thera.eutics Resea.ch Group Institute of BiotechnologyFerdowsi University of Mashhad***MashhadIran Stem Cell a.d Regenera.ive Medicine Resea.ch Group Iranian Academic Center for EducationCulture and Research(ACECR)Khorasan Razavi Branch917751376 MashhadIran

Intra.tumor heterogeneity is now a.gua.ly one of the most-studied topics in tumor biology,a. it represents a.ma.or obsta.le to effective ca.cer *** tumor cells a.e highly diverse a. genetic,epigenetic,a.d phenotypic levels,intra.tumor heterogeneity ca. be a.sumed a. a. importa.t contributing fa.tor to the nullifica.ion of chemothera.eutic effects,a.d recurrence of the *** on the role of heterogeneous subpopula.ions of ca.cer cells with va.ying cell-cycle dyna.ics a.d beha.ior during ca.cer progression a.d trea.ment;herein,we a.m to esta.lish a.comprehensive definition for a.a.ta.ion of neopla.tic cells a.a.nst *** discuss two pa.a.lel a.d yet distinct subpopula.ions of tumor cells tha. pla. pivota. roles in reducing the effects of chemothera.y:"resista.t"a.d"tolera.t"***,this review a.so highlights the impa.t of the quiescent pha.e of the cell cycle a. a.surviva. mecha.ism for ca.cer *** understa.ding the mecha.isms under-lying the quiescence,it provides a. insightful perspective on ca.cer stem cells(CsCs)a.d their dua. a.d intertwined functions ba.ed on their cell cycle sta.e in response to ***-over,CSCs,epithelia.-mesenchyma. tra.sformed cells,circula.ing tumor cells(CTCs),a.d dissemina.ed tumor cells(DTCs),which a.e mostly in a.quiescent sta.e of the cell cycle a.e proved to ha.e multiple biologica. links a.d ca. be implica.ed in our viewpoint of cell cycle heterogeneity in ***,increa.ing our knowledge of cell cycle heterogeneity is a.key to identifying new thera.eutic solutions,a.d this emerging concept ma. provide us with new opportunities to prevent the drea.ful ca.cer recurrence.

关键词： Ca.cer stem cells(CSCs) Ca.cinoma Cell cycle heterogeneity Quiescence Thera.y resista.ce Thera.y tolera.ce Tumor dorma.cy

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Using M-Qa.-OFDM in Downstrea. Link a.d WBTW-SOa.in Upstrea. of a.Bidirectiona. WDM-PON System

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Optics a.d Photonics Journa. 2013年第1期3卷 88-92页

作者： a.oob a.a.eeq mohammad a. matin Depa.tment Electrica. a.d computer Engineering University of Denver Denver USA

The pa.sive optica. network WDM-PON is one of the most domina.t performers of a.l communica.ion systems, a.d provides sufficient broa.ba.d service. Providing enough da.a.for the dema.ds of toda. a.d the future, ma.ks this a.ea.a. a.critica. topic for resea.chers. The first goa. of this a.ticle is to study the performa.ce of OFDM in a.bidirectiona. WDM-PON by using Qa. a.d BPSK modula.ion methods in the downstrea. link. The second goa. is to build the upstrea. link with WBTW-SOa.a.d show its a.ility to tra.smit the upstrea. signa. with low equipment. Sending a.d receiving signa.s from the centra. office to the la.t mile, a.d opposite of the network up to 100 Km via.a.bidirectiona. single mode optica. fiber (SMF) wa. successfully a.hieved.

关键词： PON-WDM OFDM Qa. BPSK

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Performa.ce Study of 1 Tbits/s WDM Coherent Optica. OFDM System

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Optics a.d Photonics Journa. 2013年第5期3卷 330-335页

作者： Kha.ed a.a.a.i Fa.a. a.ma.oudi mohammad a. matin Depa.tment of Electrica. a.d Computer Engineering University of Denver Denver USA

This pa.er investiga.es the a.chitecture of Tbits/s Wa.elength Division Multiplexing (WDM) system by using a.Coherent Optica. Orthogona. Frequency Division Multiplexing (CO-OFDM) with 4-Qa. for long ha.l tra.smissions of 1800 Km SM. a.simula.ion of 20 WDM cha.nels spa.ed a. 50 GHz, a.d 20 OFDM signa.s ea.h with 50 Gbits/s bitra.e to produce da.a.ra.e of 1 Tbits/s is built. The system performa.ce is studied by observing the constella.ion dia.ra. of the signa. a.d the rela.ionship of BER a.d OSNR with rega.d to tra.smission dista.ce. The results show tha. the BER increa.es a. the tra.smission dista.ce increa.es. a.so, a. the tra.smission dista.ce increa.es, the OSNR needs to be increa.ed to ma.nta.n BER in less tha. 10-3.

关键词： WDM Qa. CO-OFDM BER OSNR

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Study of OFDM Technique on RoF Pa.sive Optica. Network

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Optics a.d Photonics Journa. 2013年第2期3卷 217-224页

作者： Fa.a. a.ma.oudi Kha.ed a.a.a.i mohammad a. matin Depa.tment Electrica. a.d Computer Engineering University of Denver Denver USA

The combina.ion of ra.io over fiber (RoF) a.d orthogona. frequency division multiplexing (OFDM) techniques ha. resulted in a.high-da.a.ra.e a. lower cost in the la.t mile of wireless networks. This pa.er investiga.es the use of the OFDM a. a.modula.ion technique for ra.io over fiber (RoF) in pa.sive optica. network (PON). a.la.er source of 1550 nm wa.elength wa. used with 100 km, 140 km a.d 288 km single mode fiber. In the OFDM-PON a.pa.sive optica. splitter of ra.io 1:2 is used to connect two optica. network units (ONUs). a.10 Gbits/sec tra.smission bit ra.e is used to simula.e the RoF-OFDM-PON system. The proposed system ca. provide a.flexible, cost effective a.d significa.t high da.a.ra.e.

关键词： OFDM RoF PON ONU RoF-OFDM ISI ICI Qa.

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1.05 Tb/s Optica.-OFDM Using ROF over 3600 km

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Optics a.d Photonics Journa. 2013年第5期3卷 318-323页

作者： Fa.a. a.ma.oudi Kha.ed a.a.a.i mohammad a. matin Depa.tment of Electrica. a.d Computer Engineering University of Denver Denver USA

In this pa.er, a. effort is ma.e to a.a.yze the integra.ion of direct detection optica. orthogona. frequency division multiplexing (DDO-OFDM) with wa.elength division multiplexing (WDM) to rea.h high da.a.ra.es of 1.050 Tb/s over 3600 km single mode fiber (SMF). The 1.050 Tb/s signa. is genera.ed by multiplexing 30 OFDM signa.s with 35 Gb/s for ea.h OFDM. The performa.ce of the system is studied by mea.uring the optica. signa. to noise ra.io (OSNR) of ea.h WDM cha.nel;signa. to noise ra.io (SNR);a.d bit error ra.e (BER);while a.a.yzing the constella.ion dia.ra. of a.l users. a.so, the rela.ionship between the OSNR a.d BER is studied a.d it is noticed tha. a. the OSNR increa.ed, the BER decrea.ed. a. ca. be seen form the results, a. the tra.smission dista.ce increa.ed the BER increa.es a.d to keep the BER less tha. 10-3 we need to increa.e the OSNR.

关键词： BER O-OFDM DCF ICI ISI

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Design of Broa.ba.d RoF PON for the La.t Mile

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Communica.ions a.d Network 2012年第4期4卷 269-277页

作者： a.oob a.a.eeq Kha.ed a.a.a.i Fa.a. a.ma.oudi mohammad a. matin Depa.tment Electrica. a.d Computer Engineering University of Denver Denver USA

a. increa.e in the dema.d of broa.ba.d service ha. encoura.ed resea.ch a.d study to find a.solution to offer a. a.equa.e a.ount of service. Living in this digita. world with downloa.ing video, voice or da.a.lea.s us occa.iona.ly to ha.e a.shorta.e of ba.dwidth in the provided da.a. One of the solutions to cover the huge expected dema.d in the future is improving the communica.ion systems by a.ding optica. pa.sive components to the Ra.io over Fiber (RoF) system. This work is ma.nly to increa.e the ba.dwidth tha. a.lows the sma.l a.d single consumer a. the la.t mile. We ha.e shown tha. by a.ding the 40-GHz mm-wa.e to the system, Bit-Error-Ra.e (BER) ha. increa.ed while Q-fa.tor ha. decrea.ed.

关键词： WDM-PON MM-Wa.e Ra.io RoF Q-Fa.tor BER

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The Effects of Oxida.ion Sta.es, Spin Sta.es a.d Solvents on Molecula. Structure, Sta.ility a.d Spectroscopic Properties of Fe-Ca.echol Complexes: a.Theoretica. Study

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a.va.ces in Chemica. Engineering a.d Science 2017年第2期7卷 137-153页

作者： mohammad a. matin Ma.ha.ul M. Isla. Thoma. Bredow Moha.med a.dul a.iz Centre for a.va.ced Studies in Sciences (Ca.S) Dhaka University Dhaka Bangladesh Mulliken Center for Theoretica. Chemistry Institut für Physikalische und Theoretische Chemie Universit&auml t Bonn Bonn Germany ZFM-Center for Solid Sta.e Chemistry a.d New Ma.eria.s Leibniz Universit&auml t Ha.nover Hannover Germany Depa.tment of Chemistry Dhaka University Dhaka Bangladesh

In this study, in order to expla.n the solvent a.d spin sta.e effects on the molecula. structure of ca.echol-Fe complex [Fe(ca.)3]n﹣?where n = 2 a.d 3, Ha.tree Fock (HF)-Density Functiona. Theory (DFT) hybrid ca.cula.ions a.e performed a. the B3LYP/6-311g(d,p) level of theory. The binding energies of Fe2+ a.d Fe3+ in high-spin sta.e a.e higher tha. intermedia.e a.d low-spin sta.es which show tha. the complex forma.ion in a.high spin sta.e is more fa.ora.le. The ca.cula.ed binding energies a. different solvents indica.e tha. the binding energies in pola. solvents a.e lower tha. non-pola. solvents. Furthermore, spectroscopic studies including FTIR a.d Ra.a. spectrum in va.ious solvents revea. tha. the forma.ion of intermolecula. bonds between the oxygen a.om of ca.bonyl group a.d the hydrogen a.om of solvent ca.ses a.spectra. red shift. The ca.cula.ed FTIR a.d geometry pa.a.eters a.e in good a.reement with previous experimenta. da.a. Donor-a.ceptor intera.tion energies a.e eva.ua.ed due to the importa.ce of the cha.ge tra.sfer in the complex forma.ion. It is observed tha. the free electrons of oxygen a.om intera.t with the a.tibonding orbita.s of the iron. Fina.ly, some correla.ions between the qua.tum chemica. rea.tivity indices of the complexes a.d solvent pola.ity a.e considered. The study indica.es a.linea. correla.ion between chemica. ha.dness a.d binding energies of [Fe(ca.)3]3﹣?complex.

关键词： Tra.sition Meta. Iron-Ca.echol HF/DFT Hybrid Method Solvent Rea.tivity Indices

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