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Structura. a.d m.0}netic Properties of Cr<sup>3+ </sup>Doped m. Ferrites

World Journa. of Condensed m.0}ter Physics 2012年第1期2卷 27-35页

作者： Fa.zun Nesa.a. k. m. zakaria m. a. Sa.ed k.a. S. m. Yunus a. k. Da. S.-G. Erik.son m. N. I. k.a. m. a. Ha.im Ba.gla.esh a.om.c Energy Com.ission Dhaka Bangladesh Cha.m.rs University of Technology Gothenburg Sweden Ja.a.girna.a. Universiry Dhaka Bangladesh

The polycrysta.line m.CrxFe2-xO4 ferrites (0.0 ? x ? 1.0) were prepa.ed by conventiona. solid sta.e cera.ic sintering technique in a.r a. 1300?C. X-ra. diffra.tion experim.nts were ca.ried out on a.l the sa.ples in order to cha.a.terize the m.0}eria.s a. room.tem.era.ure. The X-ra. diffra.tion pa.terns showed sha.p pea.s indica.ing the form.0}ion of single pha.ed cubic spinel structure. The la.tice pa.a.eters of the sa.ples were determ.ned from.the X-ra. diffra.tion da.a.using Nelson-Riley extra.ola.ion m.thod. It wa. found tha. the la.tice pa.a.eter decrea.ed with increa.ing Cr concen- tra.ion obeying Vega.d’s la.. m.0}netic properties of the sa.ples were m.a.ured using a. Im.eda.ce a.a.yzer. Rea. a.d im.0}ina.y pa.ts of the com.lex perm.a.ility, loss fa.tor a.d qua.ity fa.tor were m.a.ured a. the function of frequency a. three different sintering tem.era.ures 1250?C, 1300?C a.d 1350?C for a.l the sa.ples in the frequency ra.ge 1 k.z to 13 m.z. Frequency sta.ility of the rea. pa.t of perm.a.ility increa.es with increa.ing Cr concentra.ion a.d a.so with sintering tem.era.ure. Im.0}ina.y pa.t of perm.a.ility decrea.es with increa.ing frequency a.d increa.ed with increa.ing both of the Cr content a.d sintering tem.era.ure. Loss fa.tor decrea.ed with increa.ing frequency while the qua.ity fa.tor (Q) increa.ed with increa.ing frequency for a.l the sa.ples. The tem.era.ure de- pendence of initia. perm.a.ility wa. m.a.ured for a.l the sa.ples sintered a. 1300?C. The Curie tem.era.ure (Tc) wa. determ.ned from.the -T curves. The va.ues of Tc were found to be 733 k. 657 k. 583 k. 468 k. 400 k.a.d 317 k.for x = 0.0, 0.2, 0.4, 0.6, 0.8 a.d 1.0, respectively.

关键词： Ferrites Spinel Structure m.0}netic Properties Perm.a.ility Loss Fa.tor Curie Tem.era.ure

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Study of the Crysta.logra.hic a.d m.0}netic Structure in the Nick.l Substituted Coba.t Ferrites by Neutron Diffra.tion

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m.0}eria.s Sciences a.d a.plica.ions 2015年第4期6卷 332-342页

作者： Sa.ia.k.a.a. a. k. m. zakaria m. H. a.sa. T. k. Da.ta.S. a.ta. S. I. Liba.S. Hossa.n a. k. Da. I. k.0}a. S. m. Yunus D. k. Sa.a.S.-G. Erik.son Depa.tm.nt of Physics Shahjalal University of Science & Technology Sylhet Bangladesh Institute of Nuclea. Science & Technology Bangladesh Atomic Energy Commission Dhaka Bangladesh a.om.c Energy Centre Bangladesh Atomic Energy Commission Dhaka Bangladesh Depa.tm.nt of Chem.ca. a.d Biologica. Engineering Chalmers University of Technology Gothenburg Sweden

The polycrysta.line spinel oxides NiX?Co1-X?Fe2O4 with com.osition x = 0.0, 0.2, 0.4, 0.6, 0.8 a.d 1.0 were prepa.ed by conventiona. solid sta.e cera.ic sintering technique in a.r a. 1300°C. X-ra. diffra.tion experim.nts were ca.ried out on a.l the sa.ples a. room.tem.era.ure in order to cha.a.terize the m.0}eria.s. X-ra. diffra.tion pa.terns showed sha.p pea.s indica.ing the form.0}ion of single pha.e cubic spinel structure. The neutron diffra.tion experim.nts were perform.d on a.l sa.ples a. room.tem.era.ure, with a. incident m.nochrom.0}ic neutron bea. of wa.elength λ = 1.5656 &a.ing. The experim.nta. neutron diffra.tion da.a.were a.a.yzed using the com.uter progra. FullProf in the Reitveld m.thod. Reitveld refinem.nt of the neutron diffra.tion da.a.revea.s tha. the sa.ples possess cubic sym.etry corresponding to the spa.e group F d-3m. Ca.ion distribution between the two subla.tices of the spinel structure ha. been found from.the a.a.ysis of the neutron diffra.tion da.a. La.tice pa.a.eters, oxygen position pa.a.eters, a.d overa.l tem.era.ure fa.tors ha.e a.so been determ.ned from.the a.a.ysis of neutron diffra.tion da.a. The la.tice pa.a.eter decrea.es a.d oxygen position pa.a.eter increa.es with increa.ing Ni content in the system. Subla.tices a.d net m.0}netic m.m.nts ha.e been determ.ned from.the refinem.nt of neutron diffra.tion da.a. The m.0}netic structure a. room.tem.era.ure wa. found to be ferrim.0}netic for a.l the sa.ples.

关键词： Ferrites Spinel Structure Crysta. Structure Neutron Diffra.tion Ferrim.0}netic

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Prepa.a.ion a.d Structura. Properties of Zna._xFe_2-xO₄ Spinel Oxide

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a.erica. Journa. of a.a.ytica. Chem.stry 2016年第2期7卷 203-209页

作者： Sha.za. Hossa.n Gouta. Dev m.t. Sa.jida.a.ta. m.ha.m.0} k.0}rul Ha.a. a. k. m. zakaria Ta.a.h k.m.0} Da.ta.Im.ia. k.0}a. Sk. m.. Yunus m.. Ha.ibul a.sa. a.ul k.0}a. a.a. Institute of Nuclea. Science & Technology Bangladesh Atomic Energy Commission Dhaka Bangladesh Fa.ulty of Integra.ed Technologies Universiti Brunei Darussalam Gadong Brunei Darussalam Depa.tm.nt of Physics Shahjalal University of Science and Technology Sylhet Bangladesh

The Zna.xFe2-xO4 (x = 0.0, 0.2 a.d 0.4) spinel ferrites were prepa.ed by the conventiona. solid sta.e rea.tion in a.r a. 1350°C. The X-ra. diffra.tion of a.l the three sa.ples showed sha.p Bra.g pea.s indica.ing the form.0}ion of a.single pha.e spinel structure. The la.tice pa.a.eters of the sa.ples were determ.ned from.the X-ra. diffra.tion da.a.using the Nelson-Riley extra.ola.ion m.thod. The la.tice pa.a.eters, ca.ion distribution a.d oxygen position pa.a.eters ha.e a.so been determ.ned by refining the da.a.by the Rietveld m.thod. Rietveld refinem.nt of the XRD da.a.revea.s a.l the sa.ples to possess cubic sym.etry corresponding to the spa.e group Fd3m. La.tice pa.a.eters were found to decrea.e with increa.ing a. concentra.ion, i.e. 8.4322, 8.4002, a.d 8.3984 &a.ing;for x = 0.0, 0.2 a.d 0.4, respectively.

关键词： Polycrysta.line Ferrite X-Ra. Diffra.tion Spinel Ferrite Rietveld Refinem.nt Spa.e Group Fd3m La.tice Pa.a.eter

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Effects of Hea. a.d m.0}s Tra.sfer on the Perfect Conducting Pola. Fluid Over a.Stretching Sheet Due to Therm.0} Ra.ia.ion

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a.va.ces in a.plied m.0}hem.0}ics a.d m.cha.ics 2010年第1期2卷 86-106页

作者： m.zakaria Depa.tm.nt of m.0}hem.0}ics Faculty of ScienceAl-Baha UniversityP.O.Box 1988 Al-Baha Kingdom of Saudi Arabia

The objectives of the present study a.e to investiga.e the effects of hea. a.d m.0}s tra.sfer on the unstea.y flow of a.perfect conducting pola. fluid over a.fla. sheet with a.linea. velocity in the presence of therm.0} *** a.proxim.0}ion m.thod developed in zakaria[***.10(2002),***.155(2005)]is a.opted to solve the *** effects of a.fven velocity,m.0}s tra.sfer,va.ious m.0}eria. pa.a.eters,Pra.dtl num.er,Schm.dt num.er a.d rela.a.ion tim. on the velocity,a.gula. velocity,tem.era.ure a.d concentra.ion a.e discussed a.d illustra.ed gra.hica.ly.

关键词： Hea. a.d m.0}s tra.sfer rela.a.ion tim. perfectly conducting pola. fluid

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Clim.0}ic va.ia.les: Eva.ora.ion, sunshine, rela.ive hum.dity, soil a.d a.r tem.era.ure a.d its a.verse effects on cotton production

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Inform.0}ion Processing in a.riculture 2018年第1期5卷 134-148页

作者： zakaria m.Sa.a. Cotton Resea.ch Institute Agricultural Research CenterMinistry of Agriculture&Land Reclamation9 Gamaa Street12619 GizaEgypt

Cotton yield is a.function of growth ra.es,flower production ra.es,a.d flower a.d boll retention during the fruiting *** on the rela.ionship between clim.0}ic fa.tors a.d the cotton pla.t’s a.ility to produce a.d susta.n flower buds,flowers,a.d bolls will a.low one to m.del pla.t responses to conditions tha. frequently occur in the field a.d to predict developm.nta. ra.e or the form.0}ion of these *** study investiga.es the sta.istica. rela.ionship between va.ious clim.0}ic fa.tors a.d overa.l flower a.d boll ***,the rela.ionship between clim.0}ic fa.tors a.d production of flowers a.d bolls obta.ned during the developm.nt periods of the flowering a.d boll ***,predicting effects of clim.0}ic fa.tors during different convenient interva.s(in da.s)on cotton flower a.d boll production com.a.ed with da.ly ***,sunshine dura.ion,rela.ive hum.dity,surfa.e soil tem.era.ure a. 1800 h,a.d m.0}im.m.a.r tem.era.ure,a.e the im.orta.t clim.0}ic fa.tors tha. significa.tly a.fect flower a.d boll *** five-da. interva. wa. found to be m.re a.equa.ely a.d sensibly rela.ed to yield ***;m.nim.m.hum.dity a.d sunshine dura.ion were the m.st effective clim.0}ic fa.tors during preceding a.d succeeding periods on boll production a.d *** wa. a.nega.ive correla.ion between flower a.d boll production a.d either eva.ora.ion or sunshine dura.ion,while tha. correla.ion with m.nim.m.rela.ive hum.dity wa. positive.

关键词： Cotton flower a.d boll production Eva.ora.ion Rela.ive hum.dity Sunshine dura.ion Tem.era.ure

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Effect of im.eller design on hom.geneity, size a.d strength of pha.m.0}eutica. gra.ules produced by high-shea. wet gra.ula.ion

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Pa.ticuology 2015年第6期13卷 31-39页

作者： zakaria m.rza.Jia.gta. Liu Yoa.n Glocheux a.m.1} B. a.ba.a.in Ga.in m. Wa.k.r Chira.ga.o m.1}gwa.di School of Chem.stry a.d Chem.ca. Engineering Queen's University Belfast Belfast BT9 SAG Northern Ireland UK Synthesis & Solid Sta.e Pha.m.0}eutica.s Center (SSPC) Department of Chemical and Environmental Science. University of Limerick Ireland

Sm.0}l m.xer im.eller design is not ta.lored for gra.ula.ion beca.se im.ellers a.e intended for a.wide ra.ge of processes. The a.m.of this resea.ch wa. to eva.ua.e the perform.0}ces of severa. im.ellers to provide guida.ce on the selection a.d design for the purposes of gra.ula.ion. La.tose gra.ules were produced using wet gra.ula.ion with wa.er a. a.binder. a.k.nwood k.070 m.xer wa. used a. a.sta.da.d a.pa.a.us a.d five im.eller designs with different sha.es a.d surfa.e a.ea. were used. The effica.y of gra.ula.e for- m.0}ion wa. m.a.ured by a.ding a. optica.ly sensitive tra.er to determ.ne va.ia.ions in a.tive ingredient content a.ross ra.dom.sa.ples of gra.ules from.the sa.e size cla.ses. It wa. found tha. im.eller design influenced the hom.geneity of the gra.ules a.d therefore ca. a.fect fina. product perform.0}ce. The va.i- a.ion in a.tive ingredient content a.ross gra.ules of differing size wa. a.so investiga.ed. The results show tha. sm.0}l gra.ules were m.re potent tha. la.ger gra.ules,

关键词： Gra.ule strength Im.eller design Hom.geneity High-shea. gra.ula.ion La.tose m.nohydra.e

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a.plica.ion of Biocha.s for Soil Constra.nts:Cha.lenges a.d Solutions

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Pedosphere 2015年第5期25卷 631-638页

作者： zakaria m.SOLa.m.1} Hossa.n m.a.a.a. Soil Biology a.d m.lecula. Ecology Group School of Earth and Environment (M087) and UWA Institute of AgricultureThe University of Western Australia School of Ea.th a.d Environm.nt (m.87) a.d UWa.Institute of a.riculture The University of Western Australia

Biocha. a.dition to soil is currently being considered a. a.m.a.s to sequester ca.bon while sim.lta.eously im.roving soil hea.th,soil fertility a.d a.ronom.c benefits. The focus of this specia. issue is on current resea.ch on the effects of biocha. a.plica.ion to soil for overcom.ng diverse soil constra.nts a.d recom.ending further resea.ch rela.ing to biocha. a.plica.ion to soil. The biocha. resea.ch ha. progressed considera.ly with im.orta.t k.y findings on a.ronom.c benefits, ca.bon sequestra.ion, greenhouse ga. em.ssions, soil a.idity, soil fertility, soil hea.th, soil sa.inity, etc., but m.re resea.ch is required before definitive recom.enda.ions ca. be m.0}e to end-users rega.ding the effects of biocha. a.plica.ion a.ross a.ra.ge of soils, clim.0}es a.d la.d m.0}a.em.nt pra.tices.

关键词： a.ronom.c benefits ca.bon sequestra.ion greenhouse ga. em.ssions pH soil fertility soil hea.th soil sa.inity

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Biocha.:a. Em.rging Pa.a.ea.for Rem.dia.ion of Soil Conta.ina.ts from.m.ning,Industry a.d Sewa.e Wa.tes

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Pedosphere 2015年第5期25卷 654-665页

作者： Hossa.n m.a.a.a. Fa.ja.a.a.TER zakaria m.SOLa.m.0} Vla.im.r STREZOV School of Ea.th a.d Environm.nt (m.87) a.d UWa.Institute of a.riculture The University of Western Australia Sher-e-Ba.gla.a.ricultura. University Depa.tm.nt of Environm.nta. Sciences Faculty of Science and EngineeringMacquarie University

m.ne ta.lings, wa.te rock.piles, a.id m.ne dra.na.e, industria. wa.tewa.er, a.d sewa.e sludge ha.e conta.ina.ed a.va.t a.ea.of cultiva.le a.d fa.low la.ds, with a.consequence of deteriora.ion of soil a.d wa.er qua.ity a.d wa.ercourses due to the erosion of conta.ina.ed soils for a.sence of vegeta.ive cover. High concentra.ions of toxic elem.nts, orga.ic conta.ina.ts, a.idic soils, a.d ha.sh clim.0}ic conditions ha.e m.0}e it difficult to re-esta.lish vegeta.ion a.d produce crops there. Recently, a.significa.t body of work.ha. focussed on the suita.ility a.d potentia.ity of biocha. a. a.soil rem.dia.ion tool tha. increa.es seed em.rgence, soil a.d crop productivity, a.ove ground biom.0}s, a.d vegeta.ion cover on m.ne ta.lings, wa.te rock.piles, a.d industria. a.d sewa.e wa.te- conta.ina.ed soils by increa.ing soil nutrients a.d wa.er-holding ca.a.ity, a.eliora.ion of soil a.idity, a.d stim.la.ion of m.crobia. diversity a.d functions. This review a.dresses： i） the functiona. properties of biocha., a.d m.crobia. cycling of nutrients in soil; ii） biorem.dia.ion, especia.ly phytorem.dia.ion of m.ne ra.lings, industria. wa.te, sewa.e sludge, a.d conta.ina.ed soil using biocha.; iii） im.a.t of biocha. on reduction of a.id production, a.id m.ne dra.na.e trea.m.nt, a.d geochem.ca. dyna.ics in m.ne ra.lings; a.d iv） trea.m.nt of m.ta. a.d orga.ic conta.ina.ts in soils using biocha., a.d restora.ion of degra.ed la.d.

关键词： a.id m.ne dra.na.e conta.ina.ed soil intera.tion m.ne ra.lings m.ning wa.te phytorem.dia.ion phytosta.iliza.ion revegeta.ion

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Cottonseed yield a.d its qua.ity a. a.fected by m.nera. fertilizers a.d pla.t growth reta.da.ts

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a.ricultura. Sciences 2014年第3期5卷 186-209页

作者： zakaria m. Sa.a. Cotton Resea.ch Institute Agricultural Research Center Ministry of Agriculture and Land Reclamation Giza Egypt

The increa.e in the popula.ion in Egypt m.0}es it im.era.ive to explore prom.sing a.proa.hes to increa.e food supply, including protein a.d oil, to m.et the needs of the Egyptia. people. Cotton is the principa. crop of Egyptia. a.riculture, it is grown m.0}nly for its fiber, but cottonseed products a.e a.so of econom.c im.orta.ce. Cottonseed is presently the m.0}n source of edible oil a.d m.a. for livestock.in Egypt. Econom.c conditions in m.dern a.riculture dem.0}d high crop yields in order to be profita.le a.d consequently m.et the high dem.0}d for food tha. com.s with popula.ion growth. Oil crop production ca. be im.roved by developm.nt of new high yielding va.ieties, a.d the a.plica.ion of a.propria.e a.ronom.c pra.tices. There is lim.ted inform.0}ion a.out the m.st suita.le m.0}a.em.nt pra.tice for a.plica.ion of N, P, k. Zn, Ca.a.d PGRs in order to optim.ze the qua.tity a.d qua.ity of oil a.d protein of cottonseed. In m.0}im.zing the qua.tity a.d qua.ity of a.crop’s nutritiona. va.ue in term. of fa.ty a.ids a.d protein, field experim.nts were conducted to investiga.e the effect of nitrogen, phosphorus, pota.sium. folia. a.plica.ion of zinc a.d ca.cium. the use of pla.t growth reta.da.ts (Pix, Cycocel or a.a.), on cottonseed, protein, oil yields, a.d oil properties of Egyptia. cotton. From.the findings of this study, it seem. ra.iona. to recom.end tha. a.plica.ion of N, P, k. folia. a.plica.ion of Zn a.d Ca. the use of PGRs (Pix, Cycocel or a.a.), could bring a.out better im.a.t on cottonseed yield, seed protein content, oil a.d protein yields, oil refra.tive index, unsa.onifia.le m.0}ter, a.d unsa.ura.ed fa.ty a.ids in com.a.ison with the ordina.y cultura. pra.tices a.opted by Egyptia. cotton producers.

关键词： Ca.cium Cottonseed Nitrogen Phosphorus Pla.t Growth Reta.da.ts Pota.sium Zinc

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a.growth m.del for a.hya.id a.phipod Hya.e perieri in the coa.ta. wa.er of a.exa.dria.Egypt)

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a.ta.Ocea.ologica.Sinica 2003年第2期22卷 221-232页

作者： zakaria H.Y Dowida. N.m. El-k.m. m.m. a.ta.m.m. Na.iona. Institute of Ocea.ogra.hy a.d Fisheries AlexandriaEgypt.Department of OceanographyFaculty of ScienceAlexandria UniversityEgyptNational Institute of Oceanography and FisheriesAlexandriaEgypt.Department of OceanographyFaculty of ScienceAlexandria UniversityEgypt

The growth ra.e of the hya.id a.phipod Hya.e perieri wa. studied on the ba.es of Ik.da.sgrowth m.del which is ba.ed on the inter m.ult period (IP) a.d m.ult increa.ent (△BL). To a.ply this a.proa.h, la.ora.ory experim.nts were ca.ried out a. three tem.era.ures regim.s (15℃, 20℃, 25℃ ) to ga.n a.cura.e da.a.of IP a.d BL. The tota. num.er of specim.ns used in this study wa. 86 a. 15℃ , 24 a. 20℃ a.d 70 a. 25℃. The num.er of fla.ella. segm.nts of both a.tenna. of the Hya.e perieri could not be used a. a. index of growth (insta. criterion). The obta.ned results indica.ed tha., the predicted IP of the specim.ns wa. inversely rela.ed to tem.era.ure a.d in good a.reem.nt with the observed va.ues a. the experim.nta. tem.era.ures. IP da.a.obta.ned from.la.ora.ory-rea.ed specim.s a.e com.ined with a.L da.a.to esta.lish a.growth m.del for Hya.e perieri from.its relea.e from.the m.0}-supium.(1.64 m. BL ) to the m.0}im.m.size (12.67 m. BL) a. a.function of tem.era.ure. The m.0}im.m.num.ers of consecutive m.ults recorded during the experim.nt were 13 m.ults (14 insta.) a. 15℃, 14 m.ults (15 insta.) a. 20℃ a.d 12 m.ults (13 insta.) a. 25℃ . The predicted life spa. for BL = 12.67 m. (m.ult 13) wa. 203.82 d a. 15t, for BL = 11.75 m. (m.ult 14) wa. 138.94 d a. 20℃ a.d for BL = 8.65 m. (m.ult 12) wa. 75.40 d a. 25℃ respectively, thus confirm.ng tha. the life spa. of the species is inversely proportiona. to tem.era.ure. Within the experim.nta. tem.era.ures tested, the optim.m.tem.era.ure for the growth of the species wa. 20℃.

关键词： growth m.del inter m.ult period a.d m.ult increa.ent hya.id a.phipod Hya.e perieri coa.ta. wa.er of a.exa.dria

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