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Prepa.a.ion, Cha.a.teriza.ion, a.d a.plica.ion of Ma.ga.ese Oxide Coa.ed Zeolite a. a.sorbent for Remova. of Copper(II) Ions from Sea.a.er

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Journa. of Environmenta. Protection 2019年第10期10卷 1262-1277页

作者： Moha.ed a. Shrea.a. Omnia.Ga.a. a.del Ha.id amr a. yakout Ra.a.a. H. El-Sokka.y Na.iona. Institute of Ocea.ogra.hy a.d Fisheries Alexandria Egypt ChemistryDepa.tment Faculty of Science University of Jeddah Jeddah KSA Chemistry Depa.tment Faculty of Science Alexandria University Alexandria Egypt.

The present study is a.med to exa.ine the a.sorption cha.a.teristics of Cu(II) by using the novel cellulose a.eta.e composite a.d to a.ply it for the remova. of Cu(II) from rea. wa.tewa.er sa.ples. In order to a.hieve this objective, ethylenedia.ine, diethylenetria.ine, triethylenetetra.ine a.d te-tra.thylenepenta.ene were used for immobiliza.ion of gra.ted cellulose a.eta.e-na.osca.e ma.ga.ese dioxide. Cellulose wa. extra.ted from ma.grove species a.icennia.ma.ina.a.d converted to cellulose a.eta.e then it wa. formed composite with na.o-ma.ga.ese dioxide via.precipita.ion of na.o-ma.ga.ese dioxide on it. The composite wa. gra.ted with a.ryla.ide monomer before immobiliza.ion. The synthesized compounds were used for a.sorption of Cu(II) a.d cha.a.terized by FT-IR, TGa.a.d SEM. The a.sorption cha.a.teristics of synthesized sorbents were optimized. La.gmuir a.d Freundlich models were used to esta.lish sorption equilibria. The a.a.ytica. a.plica.ions of these modified ma.eria.s were a.plied successfully for the remova. of Cu(II).

关键词： Ma.ga.ese Oxide Coa.ed Zeolite Remova. of Copper(II) Ions Sea.a.er

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Engineering of efficient visible light photoca.a.ysts:Ti_(1-x+y)Cu_(x)La.(y)O_(2)(x=0.03;y=0,0.005,0.01) compositions

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Journa. of Ra.e Ea.ths 2024年第3期42卷 497-505,I0003页

作者： S.M.yakout a.M.Youssef Inorga.ic Chemistry Depa.tment National Research Centre(NRC)El Buhouth StDokkiCairo12622Egypt

In dye-photoca.a.ysis, widening the wa.elengths a.sorption ra.ge of ca.a.ysts a. well a. a.orting the recombina.ion of the photoexcited cha.ge ca.riers(electrons-holes pa.rs) a.e of pa.a.ount *** the current study, we report the photoca.a.ytic cha.a.teristics of four compositions composed of TiO_(2),Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)powders for two ha.mful dyes(Congo red a.d methylene blue). The X-ra. diffra.tion technique verified the configura.ion of mixed a.a.a.e a.d rutile pha.es in pure TiO_(2)a.d Ti_(0.97)Cu_(0.03)O_(2)powders while Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)powders possess a.a.a.e pha.e only. The cha.ges of the ba.d ga. structure a.d dimensions of the unit cell volume of TiO_(2)confirm the substitution of Ti^(4+)sites by Cu^(2+)a.d La.(3+)ions. Rema.ka.le widening of wa.elengths a.sorption with forma.ion of long a.sorption ta.ls were found in TiO_(2)(3.13 e V) through insertion of La.(3+)plus Cu^(2+)ions. Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)sa.ples exhibit a.visible light ba.d ga. of 2.3 a.d 2.7 e V, respectively. Ba.ed on SEM ima.es, incorpora.ion of Cu^(2+)a.d La.(3+)ions influences the surfa.e morphology of TiO_(2). The resulting Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)powders present enha.ced photoca.a.ytic a.tivity towa.ds Congo red dye degra.a.ion compa.ed to pure one under na.ura. sola. spectrum. The best Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)ca.a.yst exhibits superior photoca.a.ytic a.tivity of 96% for 10 ppm CR dye in 20 min a. well a. a.ove a.era.e photoca.a.ytic efficiency of 63% for 30 ppm CR dye in 120 min. a. well, it showed a.cepta.le photodegra.a.ion a.tivity of 52% for 30 ppm MB solution in 140 min of sunlight irra.ia.ion. The heightened photodegra.a.ion efficiency of Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)ca.a.yst ca. be cla.ified in terms of higher ch

关键词： Semiconductor TiO_(2) Ra.e ea.ths Congo red Methylene blue Sola. spectrum Photodegra.a.ion

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Electrica. Conductivity a.d Sensitive Cha.a.teristics of a.-a.ded Ba.iO_3-CuO Mixed Oxide for CO_2 Ga. Sensing

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Journa. of Ma.eria.s Science & Technology 2011年第1期27卷 35-40页

作者： a.M.El-Sa.ed F.M.Isma.l S.M.yakout Inorga.ic Chemistry Depa.tment National Research CentreTahrir StreetDokki P.C.12622 CairoEgypt

Ca.bon dioxide ga. sensors ba.ed on Ba.iO3-CuO composite with different concentra.ions of a. a.dition（1,1.5 a.d 2 wt%） ha.e been prepa.ed by sta.der cera.ic method a.d sintered a. 500 a.d 700℃ for 5 *** conductivity a.d ga. sensing properties of the prepa.ed sa.ples were *** conductivity mea.urement wa. used to cha.a.terize the obta.ned sintered sensor *** wa. found tha. electrica. conductivity a.d the sensitivity to CO2 were improved with a. a.dition a.d *** correla.ion between a. content a. different sintering tempera.ure a.d sensing cha.a.teristics towa.ds CO2 is discussed.

关键词： Ba.iO3-CuO composite a. a.dition Electrica. conductivity CO2 sensitive properties

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Thea.rica. Storytelling From Pa.e to Sta.e： a. a.plied Study in Writing a.d Performing Techniques

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Journa.ism a.d Ma.s Communica.ion 2015年第11期5卷 555-564页

作者： Ga.a. El-Sa.ed Hussein Moha.ed yakout a.exa.dria.University Alexandria Egypt

Storytelling is a. importa.t performing a.t. a.tra.ting thea.er pra.titioners a.d a.diences a.e the ma.n ta.gets. Successful na.ra.or communica.ion is one of the biggest cha.lenges even when thea.res fa.ilita.e communica.ion with scenery, lighting a.d costumes etc., a. the performa.ce depends prima.ily on the text a.d na.ra.or for successful expression. This study views the most importa.t techniques to crea.e a.well-ma.e story a. both text a.d performa.ce levels. The resea.cher begins differentia.ing storytelling, imita.ion a.d cha.a.teriza.ion, a. this understa.ding a.sists the objective of this study, which is to determine specific techniques to a.hieve successful communica.ion with a. a.dience. This resea.ch highlights elements which distort story structure; including immersion in na.ra.ive without incident description, identified a. the most da.gerous element due to description being essentia. to crea.e suspense.1 Text condensa.ion is a.so crucia.. a.good writer uses his pen more for deletion tha. a.dition. Repea.ed rea.ing a.d deletion to condense the story to its optima. is vita.. a.so included a.e techniques for good text rhythm in a.dition to production of ca.tiva.ing beginnings. Further techniques to ra.se a.dience a.tention in text a.d event building, a. well a. to determine conflict a.d types, na.ra.or la.gua.e use a.d the structure of the dia.nostic viewer, fina.ly, ma.tering story ending techniques a.e provided. a. performa.ce level, this resea.ch provides techniques in crea.ivity prologue, good story rhythm, body la.gua.e a.d eye conta.t together with prop （object） use; a.l of which ena.le the na.ra.or to ca.ture a.d reta.n a.dience a.tention throughout. This resea.ch concludes with recommenda.ions on how to a.hieve a.good storytelling performa.ce.

关键词： storytelling na.ra.or a.d a.dience communica.ion successful storytelling performa.ce thea.re techniques

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Isola.ion, cytotoxic a.tivity a.d phylogenetic a.a.ysis of <i>Ba.illus sp.</i>ba.teria.a.socia.ed with the red sea.sponge <i>a.phimedon ochra.ea.lt;/i>

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a.va.ces in Bioscience a.d Biotechnology 2012年第7期3卷 815-823页

作者： Ha.a. M. a.oul-Ela.Moha.ed a. Shrea.a. Niha. M. a.del-Monem Ga.ila.a. yakout Rob W. M. va. Soest Depa.tment of Biochemistry Faculty of Science Alexandria University Alexandria Egypt Depa.tment of Ma.ine Zoology Netherlands Centre for Biodiversity Leiden The Netherlands Ma.ine Chemistry La.ora.ory the National Institute of Oceanography and Fisheries Alexandria Egypt

Most of ma.ine sponges ha.bor dense a.d diverse microbia. communities of bioa.tivity importa.ce. Four Gra. positive ba.teria. cultures (Ha.21, Ha.68, Ha. MS-105 a.d Ha.MS-119) were isola.ed from the sponge a.phimedon ochra.ea. collected from the Red Sea.coa.t of Egypt. Ba.teria. species were identified ba.ed on the phylogenetic a.a.ysis of the nucleotide sequences of their 16S rDNa.genes. The Sequences simila.ity va.ues of 98% - 100% to other stra.ns in the NCBI da.a.a.e showed strong simila.ities with the 16S rDNa.genes of firmicutes (Ba.illus sp.). The four ba.teria. species were submitted to the GenBa.k da.a.a.e a.d ha. a.cession numbers of: Ha.21 [JQ-768238];Ha.68 [JQ751264];Ha.MS-105 [JQ768239];Ha.S-119 [JQ768240]. The cytotoxic a.tivities of the ba.teria. isola.es were tested a.a.nst three esta.lished huma. ca.cer cell lines;HepG2 (hepa.ocellula. ca.cinoma., HCT (colon ca.cinoma. a.d MCF-7 (brea.t ca.cinoma.. The inhibitory effect on these cell lines, mea.ured by MTT cell a.sa. protocol, revea.ed promising cytotoxic a.tivity of the four isola.es (IC50 va.ues (μg/mL) were: Ha.21: 13.2, 9.3 a.d 12.2;Ha.68: 10.42, 4.3 a.d 5.5;Ha.MS-105: 46.9, 28.6 a.d 21.3;Ha.S-119: 10.42, 6.3 a.d 22.1;respectively). The recovery of ba.teria. stra.ns with cytotoxic a.tivity suggests tha. ma.ine invertebra.es rema.n a.rich source for the isola.ion of cultura.le isola.es ca.a.le of producing novel bioa.tive seconda.y meta.olites.

关键词： Sponge a.socia.ed Ba.teria Ba.illus Sp. Bioa.tive Meta.olites Cytotoxic a.tivity Phylogenetic a.a.ysis

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