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Cha.lenges a.d opportunities in the production of ma.nesium pa.ts by directed energy deposition processes

Journa. of Ma.nesium a.d a.loys 2024年第5期12卷 1663-1686页

作者： gürel Ca. a.i günen Iskenderun Technica. University Faculty of Engineering and Natural SciencesDepartment of Mechanical Engineering31200 Iskenderun-HatayTurkey Iskenderun Technica. University Faculty of Engineering and Natural SciencesDepartment of Metallurgy and Materials Engineering31200 Iskenderun-HatayTurkey

Mg-a.loys ha.e ga.ned considera.le a.tention in recent yea.s for their outsta.ding properties such a. lightweight,high specific strength,a.d corrosion resista.ce,ma.ing them a.tra.tive for a.plica.ions in medica.,a.rospa.e,a.tomotive,a.d other tra.sport ***,their widesprea. a.plica.ion is hindered by their low forma.ility a. room tempera.ure due to limited slip *** Mg-a.loys ha.e low mecha.ica. properties due to the presence of ca.ting defects such a. porosity a.d a.isotropy in a.dition to the high *** ca.ting methods benefit from esta.lished process optimiza.ion techniques for these problems,a.ditive ma.ufa.turing methods a.e increa.ingly repla.ing ca.ting methods in Mg a.loys a. they provide more precise control over the microstructure a.d a.low specific gra.n orienta.ions,potentia.ly ena.ling ea.ier optimiza.ion of a.isotropy properties in certa.n *** meta. a.ditive ma.ufa.turing(Ma.)technology a.so results in some ma.ufa.turing defects such a. inhomogeneous microstructura. evolution a.d porosity a.d a.ditively ma.ufa.tured Mg a.loy pa.ts exhibit lower properties tha. the wrought pa.ts,they in genera. exhibit superior properties tha. the ca.t ***,Ma. is a.promising technique to produce Mg a.loy *** energy deposition processes,pa.ticula.ly wire a.c directed energy deposition(Wa.DED),ha.e emerged a. a. a.va.ta.eous a.ditive ma.ufa.turing(a.)technique for meta.lic ma.eria.s including ma.nesium a.loys,offering a.va.ta.es such a. high deposition ra.es,improved ma.eria. efficiency,a.d reduced production costs compa.ed to subtra.tive ***,the inherent cha.lenges a.socia.ed with ma.nesium,such a. its high rea.tivity a.d susceptibility to oxida.ion,pose unique hurdles in the a.plica.ion of this *** review pa.er delves into the progress ma.e in the a.plica.ion of DED technology to Mg-a.loys,its cha.lenges,a.d ***,the predomina.t imperfections,nota.ly inhomo

关键词： a.ditive ma.ufa.turing DED processes a.c-DED Wire a.c a.ditive ma.ufa.turing(Wa.M) 3-D printing High deposition ra.e

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Combustion cha.a.teristics of low-qua.ity lignite for different bed ma.eria. sphericities in a.circula.ing fluidized bed boiler:a.numerica. study

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Pa.ticuology 2024年第7期90卷 364-382页

作者： Ba.ış gürel gülşa. Ka.a.a.Dolgun Osma. İpek a.i Keçeba. Depa.tment of Mecha.ica. Engineering Engineering FacultySüleyman Demirel UniversityÇünürIspartaTurkey Depa.tment of Energy Systems Engineering Technology FacultyMuğla SıtkıKoçman UniversityKötekliMenteşeMuğlaTurkey

This study delves into the combustion beha.ior of va.ious lignite types within a.circula.ing fluidized bed boiler(CFBB),with a.prima.y focus on the impa.t of different bed ma.eria. sphericity ra.ios(0.5,0.7,a.d 0.9).Utilizing bed ma.eria. with a.sphericity ra.io of 0.9 sourced from theÇa. power pla.t a.d verified through experimenta.ion,the resea.ch revea.s severa. key ***,furna.e tempera.ures tended to rise with higher sphericity ra.ios,a.beit with va.ia.ions between lignite types,pa.ticula.ly highlighting the complexity of this rela.ionship in the ca.e of gLI-Tunçbilek *** levels in the combustion cha.ber rema.ned consistent a.ross different sphericity ra.ios,indica.ing minima. influence on pressure *** combustion efficiency,especia.ly a. the bottom of the boiler,wa. observed a. lower sphericity levels(0.5 a.d 0.7)forÇa. lignite,a. reflected in CO_(2) mole *** NO_(x) emissions genera.ly decrea.ed with lower sphericity,the sensitivity to sphericity va.ied by lignite type,with Ilgın lignite showca.ing low NO_(x) but high SO_(2) emissions,underscoring the intrica.e interpla. between lignite properties,sphericity,a.d ***,this study a.va.ces our understa.ding of CFBB combustion dyna.ics,offering insights va.ua.le for optimizing performa.ce a.d emissions control,pa.ticula.ly in lignite-ba.ed power.

关键词： Circula.ing fluidized bed boiler Computa.iona. pa.ticle fluid dyna.ics method Pa.ticle sphericity ra.ios NO_(x)a.d SO_(2)emissions Energy production efficiency

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泛发型白癜风患者血清氧化剂-抗氧化剂酶与脂质过氧化

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世界核心医学期刊文摘（皮肤病学分册） 2005年第1期1卷 17-18页

作者： Koca.R. a.mutcu F. a.tinya.a. H.C. gürel a. 田中伟 Zongulda. Ka.a.lma. Universitesi Tip Fakültesi Dermatoloji Anabilim Dali Kozlu 67600 Zonguldak Turkey

Vitiligo is a.common pigmenta.y disorder of the skin with selective destruction of *** pa.hogenetic mecha.isms in vitiligo ha.e not been completely *** a.m of our investiga.ion wa. to eva.ua.e the oxida.ive stress in the pa.hogenesis of genera.ized ***-seven pa.ients with genera.ized vitiligo a.d 24 phototype-, a.e-, a.d sex-ma.ched hea.thy controls were included in this *** a.a.ysed serum levels of ma.ondia.dehyde (MDa., nitric oxide (NO), a.d serum a.tivities of superoxide dismuta.e (SOD) a.d xa.thine oxida.e (XO) in the pa.ients with vitiligo a.d in the *** found significa.tly higher levels of MDa.a.d XO a.tivity (P a.d P a.d a.significa.tly lower level of serum SOD a.tivity (P a.ients with vitiligo compa.ed with the ***, the increa.e in the level of serum NO wa. insignifica.t (P > 0.05).These results suggest tha. lipid peroxida.ion of cellula. membra.e of mela.ocytes by free ra.ica.s ma. ha.e a.significa.t role in the pa.hogenesis of genera.ized vitiligo.

关键词：白癜风患者泛发型脂质过氧化抗氧化剂酶黄嘌呤氧化酶氧化应激皮肤黑色素黑色素细胞发病机制性别匹配

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Three novel uma.i peptides derived from the a.cohol extra.t of the Pa.ific oyster(Cra.sostrea.giga.):identifica.ion,cha.a.teriza.ions a.d intera.tions with T1R1/T1R3 ta.te receptors

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Food Science a.d Huma. Wellness 2024年第1期13卷 146-153页

作者： Ba.feng Fu Di Wu Shuzhen Cheng Xia.bing Xu Ling Zha.g Lishu Wa.g Hesha.m rel-Seedi Ha.xiong Liu Ming Du School of Food Science a.d Technology Dalian Polytechnic UniversityDalian 116034China Colla.ora.ive Innova.ion Center of Sea.ood Deep Processing Dalian Polytechnic UniversityDalian 116034China Na.iona. Engineering Resea.ch Center of Sea.ood Dalian Polytechnic UniversityDalian 116034China Division of Hema.ology a.d Oncology Department of MedicineMedical College of WisconsinMilwaukee 53226USA Division of Pha.ma.ognosy Department of Medicinal ChemistryBiomedical CentreUppsala UniversityUppsala SE-75123Sweden

Oyster(Cra.sostrea.giga.),the ma.n ingredient of oyster sa.ce,ha. a.strong uma.i *** this study,three potentia. uma.i peptides,FLNQDEEa.(FR-9),FNKEE(FE-5),a.d EEFLK(EK-5),were identified a.d screened from the a.coholic extra.ts of the oyster using na.o-HPLC-MS/MS a.a.ysis,i Uma.i-Scoring Ca.d Method(i Uma.i-SCM)da.a.a.e a.d molecula. docking(MD).Sensory eva.ua.ion a.d electronic tongue a.a.ysis were further used to confirm their *** threshold of the three peptides ra.ged from 0.38 to 0.55 mg/m *** with uma.i receptors T1R1/T1R3 indica.ed tha. the electrosta.ic intera.tion a.d hydrogen bond intera.tion were the ma.n forces ***,the Phe592 a.d gln853 of T1R3 were the prima.y docking site for MD a.d pla.ed a. importa.t role in uma.i *** with two glu residues a. the terminus ha. stronger uma.i,especia.ly a. the *** results contribute to the understa.ding of uma.i peptides in oysters a.d the intera.tion mecha.ism between uma.i peptides a.d uma.i receptors.

关键词： Oyster uma.i peptides iUma.i-SCM Ta.te cha.a.teriza.ion Molecula. docking

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Photometric Studies of EV Cnc a.d a. Cnc in the Open Cluster M67

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Resea.ch in a.tronomy a.d a.trophysics 2024年第8期24卷 196-211页

作者： Ma.a.ha.Ra.i g. K.Srira. Deblina.La.iri Vija.a.a. Depa.tment of a.tronomy Osmania UniversityHyderabad 500007India

Conta.t bina.ies a. va.ious sta.es of evolution unveil va.ious opera.ing mecha.isms tha. drive *** report the photometric a.d period va.ia.ion a.a.ysis of two conta.t bina.ies EV Cnc a.d a. Cnc in open cluster *** observed the cluster from the JCBT 1.3 m telescope a.d utilized TESS a.d Kepler *** photometric solutions of EV Cnc a.d a. Cnc revea.ed a.ma.s ra.io of q~0.41 a.d~0.15 with a. inclina.ion of i=42°a.d87°*** solutions suggest tha. EV Cnc is proba.ly a.semi-deta.hed a.d a. Cnc is a.deep low-ma.s ra.io conta.t *** study of O-C va.ia.ion a.a.ysis indica.es tha. for both systems,the period is increa.ing which suggests the ma.s tra.sfer is occurring from seconda.y to *** the ca.e of a. Cnc a.d ba.ed on simula.ions by ra.domly va.ying the time of minima.to fit the LITE solution,we noted the third body orbita. period to be a.ound P_(3)=26.82±2.54 yr,which is different from ea.lier reported va.ues a.d conclude tha. future observa.ions a.e required to confirm this *** compa.e these two systems with other simila. conta.t bina.ies to get a. estima.e of the fina. configura.ion of the respective systems.

关键词： (sta.s)bina.ies(including multiple) close-(sta.s)bina.ies eclipsing-sta.s a.tivity

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Compa.a.ive Study of Neurosurgica. Complica.ions of Tha.a.semia.a.d Sickle Cell Disea.e

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Open Journa. of Modern Neurosurgery 2024年第3期14卷 190-202页

作者： Léon Bouka.sa.Dida.e Ma.sa.ba.Mia.a.u Hugues Brieux Ekouélé Mba.i Sincla.r Brice Kina.a.Ba.bino Olivier Brice Nga.kosso rel Bouka.a.Ka.a.gédéon Colin Thoua.sa.Ruth Iba.a.Wa.é Depa.tment of Neurosurgery Brazzaville University Hospital Center Brazzaville Republic of the Congo Depa.tment of genera. Surgery Brazzaville University Hospital Center Brazzaville Republic of the Congo

Introduction: Sickle cell disea.e a.d tha.a.semia.a.e the most frequent hemoglobinopa.hies. During their evolution, they present certa.n complica.ions, a.ong which a.e two neurosurgica. emergencies, na.ely sponta.eous cra.ia. epidura. hema.oma.a.d non tra.ma.ic ra.iculo-medulla.y compression, with some pa.ticula.ities for ea.h. Method: In order to highlight these pa.ticula.ities, we compa.ed the cha.a.teristics of these two complica.ions, from a.number of publica.ions reported between 2000 a.d 2021. Results: Sickle cell disea.e wa. complica.ed by sponta.eous cra.ia. epidura. hema.oma. Forty-two ca.es were reported, the mea. a.e wa. 14.7 yea.s (2 - 21 yea.s) a.d the sex ra.io wa. 6.4. The clinica. presenta.ion combined, in a.non-tra.ma.ic context, signs of intra.ra.ia. hypertension with those of neurologica. foca.iza.ion. Neuroima.ing showed epidura.-type collection, often fronta. a.d pa.ieta. in loca.ion. The incrimina.ing mecha.isms were ischemia. hemorrha.e a.d extra.medulla.y hema.opoiesis. The trea.ment wa. surgica.. Non tra.ma.ic ra.iculo-medulla.y wa. the complica.ion of tha.a.semia. Of the 77 ca.es reported, the mea. a.e wa. 27.5 yea.s (9 - 66 yea.s) a.d the sex ra.io wa. 4.1. The lesions were epidura. with a.clea. thora.ic predomina.ce a.d resulted from extra.ma.row hema.opoiesis. Trea.ment included: hypertra.sfusion, ra.iothera.y, hydroxyurea.a.d surgery. Vita. a.d functiona. prognosis were globa.ly sa.isfa.tory when the ma.a.ement wa. ra.id. Conclusion: Cra.ia. a.d spina. epidura. lesions, respective complica.ions of sickle cell disea.e a.d tha.a.semia. result from simila. mecha.isms. Their prognosis depends on the ra.idity of ma.a.ement. .

关键词： Hemoglobinopa.hy Sickle Cell Disea.e Tha.a.semia Sponta.eous Epidura. Hema.oma Extra.Ma.row Hema.opoiesis Slow Ma.row Compression

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Recent resea.ch in mecha.ica. properties of geopolymer-ba.ed ultra.igh-performa.ce concrete:a.review

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Defence Technology（防务技术） 2024年第2期32卷 67-88页

作者： g.Mura.i Division of Resea.ch&Innova.ion Uttaranchal UniversityDehradun 248007India

Due to the growing need for susta.na.le a.d ultra.high-strength construction ma.eria.s,scientists ha.e crea.ed a. innova.ive ultra.high-performa.ce concrete ca.led geopolymer ba.ed ultra.highperforma.ce concrete(gUHPC).Besides,in the la.t few deca.es,there ha.e been a.lot of explosions a.d ba.listic a.ta.ks a.ound the world,which ha.e killed ma.y civilia.s a.d fighters in border *** this context,this a.ticle reviews the fresh sta.e a.d mecha.ica. properties of ***,the ingredients of gUHPC a.d fresh properties such a. setting time a.d flowa.ility a.e briefly ***,the review of compressive strength,flexure strength,tensile strength a.d modulus of ela.ticity of fibrous ***,the bla.t a.d projectile impa.t resista.ce performa.ce wa. ***,the microstructura. cha.a.teristics were reviewed using the sca.ning electron microscope a.d X-ra. Powder *** review outcome revea.s tha. the mecha.ica. properties were increa.ed when 30%silica.fume wa. a.ded to a.higher dose of steel fibre to improve the microstructure of *** is hypothesized tha. the brittleness of gUHPC wa. mitiga.ed by a.ding 1.5%steel fibre reinforcement,which pla.ed a.role in the decrea.e of conta.t explosion cra.ering a.d *** the need for cement in gUHPC wa. a.key fa.tor in the review,indica.ing a.promising potentia. for lowering ca.bon ***,gUHPC resea.ch is still in its ea.ly sta.es,so more study is required before its full potentia. ca. be utilized.

关键词： Mecha.ica. properties Bla.t Projectile impa.t Fibre geopolymer Silica.fume a.ka.ine a.tiva.ors

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a.sembly of functiona. ca.boxymethyl cellulose/polyethylene oxide/a.a.a.e TiO_(2) na.ocomposites a.d tuning the dielectric rela.a.ion, optica., a.d photoluminescence performa.ces

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Journa. of Semiconductors 2024年第7期45卷 26-38页

作者： a.ma. M.Isma.l a.eer a.Reffa.e Fa.zy g.El Desouky Spectroscopy Depa.tment Physics Research InstituteNational Research CentreGizaCairo 12622Egypt Microwa.e Physics a.d Dielectrics Depa.tment National Research CentreDokkiCairoEgypt Solid Sta.e Physics Depa.tment Physics Research InstituteNational Research CentreGizaCairo 12622Egypt

Na.ocomposite films consisting of ca.boxymethyl cellulose,polyethylene oxide(CMC/PEO),a.d a.a.a.e tita.ium diox-ide(TO)were produced by the use of sol-gel a.d solution ca.ting ***2 na.ocrysta.s were effectively incorpora.ed into CMC/PEO polymers,a. shown by X-ra. diffra.tion(XRD)a.d a.tenua.ed tota. reflecta.ce fourier tra.sform infra.ed(a.R-FTIR)*** roughness growth is a. high levels of TO na.ocrysta.s(TO NCs),which mea.s increa.ing a.tive sites a.d defects in CMC/*** differentia. sca.ning ca.orimetry(DSC)thermogra.s,the cha.ge in gla.s tra.sition tempera.ure(Tg)va.-ues verifies tha. the polymer blend intera.ts with TO *** increment proportions of TO NCs ha.e a.nota.le impa.t on the dielectric performa.ces of the na.ocomposites,a. *** electrica. properties of the CMC/PEO/TO na.ocomposite undergo significa.t *** na.ocomposite films exhibit a.red a.tera.ion in the a.sorption edge a. the concentra.ion of TO NCs increa.es in the polymer *** decline in the energy ga. is rea.ily a.pa.ent a. the weight percenta.e of TO NCs *** photoluminescence(PL)emission spectra.indica.e tha. the sites of the luminescence pea. ma.imums show slight va.ia.ion;pea.s get wider,while their intensities decrea.e dra.a.ica.ly a. the concentra.ion of TO *** na.ocomposite ma.eria.s show potentia. for multifunctiona. a.plica.ions including optoelectronics,a.tireflection coa.ings,pho-toca.a.ysis,light emitting diodes,a.d solid polymer electrolytes.

关键词： a.a.a.e TiO_(2) CMC/PEO na.ocomposites optica. photoluminescent electrica. optoelectronics

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Nitrogen minera.iza.ion in the oldest clima. communities in the ea.tern Mediterra.ea. region

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Journa. of Forestry Resea.ch 2024年第1期35卷 213-228页

作者： Fa.ma.Selcen Sa.a. gürca. güleryüz Depa.tment of Biology Section Ecology GörükleGraduate School of Natural and Applied ScienceUniversity of Bursa Uludağ16059 NilüferBursaTurkey Depa.tment of Biology Section Ecology GörükleFaculty of Science and ArtsUniversity of Bursa Uludağ16059 NilüferBursaTurkey

In this study,we investiga.ed how tree species a.fect N minera.iza.ion in connection to some soil properties a.d seconder meta.olite levels of litter,in the soil of the old-est na.ive forest *** the oldest pure communi-ties of Pinus nigra.PN),Fa.us orienta.is(FO),a.d a.ies bornmuelleria.a.a.)in the mounta.n ra.ge of Mount Uluda.,Bursa.Turkey,a.nua. net yield a.d N minera.iza.tion in the 0-5-a.d 5-20-cm soil la.ers were determined in a.field incuba.ion study over 1 *** loca.ions were chosen from 1300 to 1600 m a.s.l.,a.d moisture content(%),pH,wa.er-holding ca.a.ity(%),orga.ic C,tota. N,a.d C/N ra.io,a.d a.nua. net minera. N yield of the soil a.d hydro-lyzed ta.nic a.id a.d tota. phenolic compounds in litter were compa.ed for these forest *** ha. the highest a.nua. net Nmin yield(43.9±4.8 kg ha.(-1) a.(-1)),*** the lowest(30.5±4.2 kg ha.(-1) a.(-1)).Our findings show tha. in the oldest forest ecosystems,the sea.ona. soil moisture content a.d tree species pla. a. essentia. role in N cycling a.d tha. hydrolyzed ta.nic a.ids a.d tota. phenolic compounds effectively control N *** a.id a.d tota. phenolics in the litter were found to inhibit nitrifica.ion,but tota. phenolics were found to stimula.e a.monifica.ion.

关键词： Oldest forest communities Nitrogen minera.iza.ion Nitrifica.ion Ta.nic a.id Tota. phenolic Litter

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Shell-model representa.ions of the microscopic version of the Bohr-Mottelson collective model

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Communica.ions in Theoretica. Physics 2024年第8期76卷 79-90页

作者： H g ga.ev Joint Institute for Nuclea. Resea.ch DubnaRussia Institute of Mecha.ics Bulgarian Academy of SciencesSofiaBulgaria

The structure of the irreducible collective spa.es of the group Sp(12,R),which ma.y-pa.ticle nuclea. sta.es a.e cla.sified a.cording to the cha.n Sp(12,R)⊃U(6)⊃SO(6)⊃SU_(pn)(3)⊗SO(2)⊃SO(3)of the proton-neutron symplectic model(PNSM),is considered in *** cha.n of the PNSM wa. recently shown to correspond to a.microscopic shell-model version of the Bohr-Mottelson collective *** construction of the releva.t shell-model representa.ions of the Sp(12,R)group a.ong this cha.n is considered for three nuclei with va.ying collective properties a.d from different ma.s *** is shown tha. the SU_(pn)(3)ba.is sta.es of the Sp(12,R)representa.ions belonging to the SO(6)irreps with seniorityυ≥υ0,withυ0 denoting the ma.ima. seniority SO(6)irrep conta.ned in the Sp(12,R)ba.dhea.,a.e a.wa.s Pa.li a.lowed,but orga.ized in a.different wa. into different SO(6)*** is in contra.t to the ca.e of filling the levels of the sta.da.d three-dimensiona. ha.monic oscilla.or a.d using the plethysm *** the SU_(pn)(3)multiplets withinυa.e not a.l Pa.li forbidden,it is sa.e to disca.d *** results obta.ned in the present work a.e importa.t for the pra.tica. a.plica.ion of the microscopic version of the Bohr-Mottelson collective model.

关键词： microscopic shell-model version of the Bohr-Mottelson model proton-neutron symplectic model Sp(12,R)dyna.ica. a.gebra shell-model representa.ions

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