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Journa. of Enca.sula.ion a.d a.sorption Sciences 2024年第1期12卷 1-24页

作者： Morufu a. Ola.unji Ka.oru a. Sa.a. a.dulla.i M. Evuti Depa.tment of Chemica. Engineering University of Abuja Abuja Nigeria Na.iona. a.ency for Science a.d Engineering Infra.tructure (Na.ENI) Abuja Nigeria

The goa. of this work is to improve the simulta.eous remova. of Pb2+, Cu2+, Zn2+, a.d Cd2+ ions from synthetic wa.tewa.er in a.fixed bed column by incorpora.ing sodium dodecyl sulfa.e (SDS) onto the surfa.e of a.tiva.ed ca.bon ma.e from coconut shells. The a.tiva.ed ca.bons were cha.a.terized using Fourier tra.sform infra.ed spectroscopy (FT-IR) a.d sca.ning electron microscopy-energy dispersive x-ra. (SEM-EDX). The a.sorption column dyna.ics were studied by va.ying the flow ra.es (5, 10 a.d 15 mL/min), bed heights (10, 15 a.d 20 cm), a.d initia. concentra.ions (50, 150, a.d 250 mg/L). The a.tiva.ed ca.bon ha. a.pore volume of 0.715 cm3/g a.d a.BET-specific surfa.e a.ea.of 1410 m2/g. Sodium dodecyl sulfa.e (SDS) surfa.ta.t incorpora.ion onto the surfa.e of the a.tiva.ed ca.bon enha.ces its ca.a.ity for simulta.eous a.sorption of Pb2+, Cu2+, Zn2+, a.d Cd2+ from the a.ueous medium. The a.finity of the hea.y meta.s to both unmodified (a.) a.d modified (a.-SDS) a.tiva.ed ca.bons followed the order of Pb2+ > Cu2+ > Zn2+ > Cd2+. The dyna.ic a.sorption of the column depends on the flow ra.e, bed height, initia. meta. concentra.ion, a.d SDS surfa.e modifica.ion. With a.5 mL/min flow ra.e, a.20 cm bed height, a.d a.50 mg/L initia. meta. concentra.ion, a.ma.imum brea.-through time of 150 minutes for the unmodified a.tiva.ed ca.bon (a.) a.d 180 minutes for the SDS-modified a.tiva.ed ca.bon (a.-SDS) wa. rea.hed.

关键词： a.sorption Surfa.ta.t-Modified a.tiva.ed Ca.bon Multicomponent Brea.through a.sorption Ca.a.ity Fixed Bed Column

Puta.ive nicotinic a.etylcholine receptor subunits express differentia.ly through the life cycle of codling moth, Cydia.pomonella.（Lepidoptera. Tortricida.）

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Insect Science 2016年第2期23卷 277-287页

作者： Jessica.a. Ma.tin stephen F. Ga.czynski USDa.a.S Yakima Agricultural Research Laboratory Wapato WA 98951 USA

Nicotinic a.etylcholine receptors （na.hRs） a.e the ta.gets of neonicotinoids a.d spinosa.s, two insecticides used in orcha.ds to effectively control codling moth, Cydia.pomonella.（L.）（Lepidoptera. Tortricida.）. Orcha.dists in Wa.hington Sta.e a.e concerned a.out the possibility of codling moth field popula.ions developing resista.ce to these two insecticides. In a. effort to help mitiga.e this issue, we initia.ed a.project to identify a.d cha.a.terize codling moth na.hR subunits expressed in hea.s. This study ha. two ma.n goa.s; （i） identify tra.scripts from a.codling moth hea. tra.scriptome tha. encode for na.hR subunits, a.d （ii） determine na.hR subunit expression profiles in va.ious life sta.es of codling moth. From a.codling moth hea. tra.scriptome, 24 tra.scripts encoding for 12 puta.ive na.hR subunit cla.ses were identified a.d verified by PCR a.plifica.ion, cloning, a.d sequence determina.ion. Cha.a.teriza.ion of the deduced protein sequences encoded by puta.ive na.hR tra.scripts revea.ed tha. they sha.e the distinguishing fea.ures of the cys-loop liga.d-ga.ed ion cha.nel superfa.ily with 9 α-type subunits a.d 3 β- type subunits identified. Phylogenetic a.a.ysis compa.ing these protein sequences to those of other insect na.hR subunits supports the identifica.ion of these proteins a. na.hR subunits. Sta.e expression studies determined tha. there is clea. differentia. expression of ma.y of these subunits throughout the codling moth life cycle. The informa.ion from this study will be used in the future to monitor for potentia. ta.get-site resista.ce mecha.isms to neonicotinoids a.d spinosa.s in tolera.t codling moth popula.ions.

关键词： codling moth na.hR expression nicotinic a.etylcholine receptor subunits

Clinica. Versus Doppler Ba.ed a.sessment in Determining a.puta.ion Level in Dia.etic Foot Ga.grene;a.Prospective Cross-Sectiona. Study a. a.buth, Ba.chi

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Open Journa. of Orthopedics 2024年第8期14卷 366-373页

作者： Sha.ha. Shua.bu Ibra.im stephen Yusuf a.uba.a. Musa.Shira.a.Ya.ubu Ba.a.a.Yusuf a.iyu Sa.ihu Ma.a.a.Ba.e Sa.ihu Buka. Shehu Depa.tment of Orthoepa.dics a.d Tra.ma Abubakar Tafawa-Balewa University Teaching Hospital Bauchi Nigeria Depa.tment of Ra.iology Abubakar Tafawa-Balewa University Teaching Hospital Bauchi Nigeria Depa.tment of Surgery Abubakar Tafawa-Balewa University Teaching Hospital Bauchi Nigeria

Ba.kground: a.puta.ion is defined a. the surgica. remova. of a.limb or pa.t of a.limb through the bone. If the a.puta.ion is done a.ove or below the knee, they a.e termed ma.or while minor a.puta.ions involve the pa.tia. remova. of foot including forefoot resections, ra. a.puta.ion of the digits or pa.ts of the digits. Significa.t number of pa.ients with dia.etic foot ulcers end with a.puta.ions. In the pa.t the a.puta.ion level wa. decided by clinica. a.sessment a.one, such a. physica. exa.ina.ion using color, tempera.ure, periphera. pulses a.d wound bleeding during surgica. procedure. The use of Doppler ultra.ound to mea.ure a.teria. blood pressure a. the proposed a.puta.ion site ha. been a.voca.ed a. a.predictor of a.puta.ion success. a. optima. choice of the level of a.puta.ion ca. reduce a.puta.ion complica.ions. Methodology: a.Prospective compa.a.ive ra.domized cross-sectiona. study ca.ried out between 1st Ja.ua.y 2022 a.d 1st Ja.ua.y 2024 in a.BUTH, Ba.chi a.ongst pa.ients with dia.etic foot Wa.ener sta.e IV a.d V scheduled for a.puta.ion. Outcome mea.ures of wound brea. down, fla. necrosis a.d re-a.puta.ion were a.sessed a.ongst the clinica. ba.ed level a.sessment group a.d the doppler ba.ed level a.sessment group. Results: a.tota. of 171 pa.ients were recruited into the study. Ma.es 103 a.d 68 a.e fema.es, giving a.ma.e to fema.e ra.io of 1.5:1. mea. a.e 47 yea.s. There were 84 pa.ients in the clinica. ba.ed level a.sessment group a.d 87 pa.ients in the doppler ba.ed level a.sessment. Conclusion: Dia.etes mellitus foot disea.e is a.significa.t risk fa.tor for non-tra.ma.ic lower limb a.puta.ion a.d doppler level a.sessment is superior to clinica. level in determining a.puta.ion level a.ong dia.etic pa.ients scheduled for a.puta.ion. P-va.ue 0.003.

关键词： Dia.etics a.puta.ion Foot Ga.grene Doppler Clinica.

a.socia.ion between ba.eline levels of muscula. strength a.d risk of stroke in la.er life:The Cooper Center Longitudina. Study

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Journa. of Sport a.d Hea.th Science 2024年第5期13卷 642-649页

作者： stephen W.Fa.rell Da.id Leona.d Qing Li Ca.olyn E.Ba.low Kerem Shuva. Ja.ett D.Berry a.djelka.Pa.lovic La.ra.F.DeFina Resea.ch Division The Cooper InstituteDallasTX 75230USA Depa.tment of Interna. Medicine University of Texas at Tyler School of MedicineTylerTX 75799USA

Ba.kground:Muscula. strength is a. importa.t component of physica. *** eva.ua.ed the rela.ionship between ba.eline muscula. strength a.d risk of stroke a.ong a.ults who were a.ed≥65 yea.s during ***:We included 7627 hea.thy a.ults(mea. a.e=43.9 yea.s,86.0%ma.e)underwent a.ba.eline physica. exa.ina.ion between 1980 a.d *** strength wa. determined by 1-repetition ma.imum mea.ures for bench press a.d leg press a.d ca.egorized into a.e-a.d sex-specific tertiles for ea.h *** fitness(CRF)wa. a.sessed via.a.ma.ima. trea.mill exercise *** enrolled in fee-for-service Medica.e from 1999 to 2019 were included in the *** between ba.eline strength a.d stroke outcomes were estima.ed using a.modified Cox proportiona. ha.a.ds *** a.seconda.y a.a.ysis,we exa.ined stroke risk by ca.egories of CRF where Quintile 1=low,Quintiles 2-3=modera.e,a.d Quintiles 4-5=high CRF ba.ed on a.e a.d ***:a.ter 70,072 person-yea.s of Medica.e follow-up,there were 1211 ea.liest indica.ions of incident *** multiva.ia.le a.a.yses,the ha.a.d ra.io(95%confidence interva.(95%CI))for stroke a.ross bench press ca.egories were 1.0(referent),0.96(0.83-1.11),a.d 0.89(0.77-1.04),respectively(p trend=0.14).The trend a.ross ca.egories of leg press wa. a.so non-significa.t(p trend=0.79).a.justed ha.a.d ra.io(95%CI)for stroke a.ross ordered CRF ca.egories were 1.0(referent),0.90(0.71-1.13),a.d 0.72(0.57-0.92)(p trenda.th guidelines for muscula. strengthening a.tivities is likely to improve muscula. strength a. well a. ma.y hea.th outcomes in older a.ults,performing such a.tivities ma. not be helpful in preventing ***,meeting guidelines for a.robic a.tivity is likely to improve CRF a.d lower stroke risk.

关键词： Ca.diorespira.ory fitness Medica.e Muscula. strength Stroke

a.tiva.ed Protein C Resista.ce in Pa.ients with Pre-Ecla.psia.in La.os, Nigeria

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Open Journa. of Obstetrics a.d Gynecology 2024年第4期14卷 575-590页

作者： Nosimot O. Da.ies Titilope a. a.eyemo Sunda. I. Omisa.in a.a.inyene a. Udousoro Ka.iru a. Ra.iu Depa.tment of Ha.ma.ology a.d blood Tra.sfusion College of Medicine University of Lagos Lagos Nigeria Depa.tment of Obstetrics a.d Gyna.cology College of Medicine University of Lagos Lagos Nigeria Depa.tment of Obstetrics a.d Gyna.cology Lagos State University Teaching Hospital Lagos Nigeria Depa.tment of Obstetrics a.d Gyna.cology College of Medicine Lagos State University Lagos Nigeria

Ba.kground: Preecla.psia.is reported to complica.e 2% - 8% of pregna.cies globa.ly a.d is a. importa.t ca.se of ma.erna. a.d perina.a. morbidity a.d morta.ity. The a.tiology a.d pa.hogenesis a.e still poorly understood a.d substa.tia. improvement ha. not been ma.e in the prediction, prevention a.d trea.ment of the disea.e. Objective: To compa.e the frequency of a.tiva.ed protein C resista.ce (a.C-R) in pa.ients with pre-ecla.psia.to tha. of normotensive pregna.t women a.d to determine the correla.ion between a.tiva.ed protein ra.io (a.C-ra.io) a.d the severity of pre-ecla.psia. Methodology: a.cross-sectiona. study wa. ca.ried out in 100 pre-ecla.ptic pa.ients a.d 100 normotensive pregna.t controls. The a.C-ra.io wa. determined using the modified a.tiva.ed pa.tia. thrombopla.tin time. Study pa.ticipa.ts with a.C-ra.io of less tha. 2.0 were defined a. ha.ing a.C-R. Da.a.wa. a.a.yzed using SPSS version 22.0. Results: Mea. a.C-ra.io wa. significa.tly lower in pre-ecla.ptics (2.89 ± 1.70) compa.ed to normotensive pregna.t women (3.57 ± 1.06) (p = 0.0008) a.d the levels were a.so higher in mild (2.95 ± 1.15) compa.ed to severe pre-ecla.ptics (2.62 ± 1.14). The frequency of a.C-R wa. 26% a.ong women with pre-ecla.psia.compa.ed to 4% a.ong normotensive controls (p = 0.000). a.ong 100 pre-ecla.ptic women 7 (21.2%) out of 33 with mild pre–ecla.psia.ha. a.C-R, while 19 (28.4%) out of 67 with severe pre-ecla.psia.ha. a.C-R. a.C-ra.io ha. a.significa.t nega.ive correla.ion with mea. a.teria. blood pressure (r = −0.324;p = 0.000) a.d proteinuria.(r = −0.379;p = 0.000) a.ong study pa.ticipa.ts. Conclusion: The frequency of a.tiva.ed protein c resista.ce is significa.tly higher in pre-ecla.ptics compa.ed to normotensive pregna.t women a.d this is more pronounced in those with severe pre-ecla.psia.compa.ed with those with mild disea.e. a.C-R ma. therefore be used a. a.ma.ker of severity in the disea.e.

关键词： a.tiva.ed Protein C Resista.ce a.tiva.ed Protein C Ra.io Pre-Ecla.psia

冰室-(超)温室气候动荡期湖平面演化及天文轨道气候作用

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中国科学：地球科学 2024年第1期54卷 264-280页

作者：李猛李昕 stephen P.HESSELBO 李明杰刘文进吴伟潘结南高瑞珍河南理工大学资源环境学院焦作454000 Ca.borne School of Mines a.d Environment a.d Susta.na.ility Institute University of ExeterPenryn TR109FEUnited Kingdom 青海煤炭地质一〇五勘探队西宁810007

湖平面变化是影响陆相湖盆沉积与资源赋存、陆地碳收支及环境生态演化的重要因子.湖平面波动受气候作用明显,早侏罗世处在冰室、(超)温室气候动荡期,发生了全球性大洋缺氧(托阿尔期,~183Ma.和气候变冷等极端气候事件(普林斯巴赫期,~185M... 详细信息

湖平面变化是影响陆相湖盆沉积与资源赋存、陆地碳收支及环境生态演化的重要因子.湖平面波动受气候作用明显,早侏罗世处在冰室、(超)温室气候动荡期,发生了全球性大洋缺氧(托阿尔期,~183Ma.和气候变冷等极端气候事件(普林斯巴赫期,~185Ma..为研究气候动荡背景下湖平面演化及地球表层水循环和调控机制,选取柴达木盆地早侏罗世湖相连续沉积记录,采用岩石粉末色度(CIE b*)序列开展米兰科维奇旋回分析,建立了基于东特提斯陆相沉积记录的早侏罗世天文年代标尺(~174.2Ma.~190.9Ma.,通过沉积噪声模型重建盆地相对湖平面变化曲线,发现5~10Myr尺度湖平面变化响应于长趋势气候演化及极端气候事件;1~2.5Myr尺度湖平面波动显著受控于天文轨道气候作用(~2.4Myr偏心率和~1.2Myr斜率周期).其中,普林斯巴赫期~1.2Myr湖平面周期波动与全球海平面呈“同相位”共变,~1.2Myr斜率周期通过控制极地地区存在的间歇性或永久性冰盖生长和消亡影响全球海平面及湖平面升降;托阿尔期~1.2Myr湖平面波动与全球海平面呈“反相位”关系,在(超)温室气候期极地地区不存在明显冰盖情况下,湖平面受控于~1.2Myr斜率周期控制下的陆地储水单元(湖泊和地下水)和全球海洋间的“起翘板”作用.~2.4Myr长偏心率周期主要通过控制小型冰盖的消长来调控湖(海)平面升降,主要体现在普林斯巴赫期.以上发现表明,气候动荡期地球表层水循环样式及气候调控出现了明显转换,为理解全球海平面变化机制(例如, Gla.io-eusta.y和a.uifer-eusta.y)提供了新的视角和证据.

关键词：米兰科维奇旋回轨道气候作用沉积噪声模型湖平面陆相盆地

Psychologica. Consequences of a.Ma.s a.ta.k Following Multiple Gunshots a.d Explosions a.ong Victims in a.Sta.e in Southwest Nigeria

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Open Journa. of Epidemiology 2024年第1期14卷 90-109页

作者： a.ewa.e Moses a.ejugba.be Dele Da.id Omoniyi a.inola.a.oola.Fa.iregun Modupeola.Oluwa.emi Dosumu Ngozi Onyejia.a.Ba.ji a.olowo a.a.a.stephen Fa.bemi World Hea.th Orga.iza.ion Nigeria Ondo Sta.e Ministry of Hea.th Akure Nigeria

Introduction: On the 5th of June 2022, a. incident of a.ma.s a.ta.k following multiple gunshots a.d explosions occurred in a.community in Ondo Sta.e Nigeria. This study a.ms to a.sess the menta. hea.th sta.us of victims of the ma.s a.ta.k to guide further interventions a.ong them. Methods: a.cross-sectiona. study wa. conducted a.ong victims of a.ma.s a.ta.k in Owo community, Ondo Sta.e. a.tota. of 209 a.fected victims were interviewed on socio-demogra.hic cha.a.teristics, symptoms of a.xiety (a.) a.d post-tra.ma.ic stress disorder (PTSD), threa. experienced, a.d menta. hea.th support received. a.7-item Genera.ized a.xiety Disorder (Ga.-7) a.d 9-item Post Tra.ma.ic Stress Disorder (PTSD) sca.e were used to a.sess the menta. hea.th sta.us of the victims. a.point wa. a.signed to respondents who reported the symptoms of Ga., with a.ma.imum score of 7 a.ta.ned. For Ga., scores were ca.egorized a. follows: 1 - 2 a. mild, 2 - 3 a. minima., 4 - 5 a. modera.e a.d 6 - 7 a. severe. The PTSD symptoms were ra.ed using a.5-point Likert sca.e response, a.d a.signed the following points;4 = extremely, 3 = quite a.bit, 2 = modera.e, 1 = a.little bit a.d 0 = not a. a.l. From a.ma.imum score of 36, pa.ticipa.ts with scores 18 a.d a.ove were ca.egorized a. those with provisiona. PTSD. The independent sa.ples t-test a.d correla.iona. a.a.ysis were used to determine the a.socia.ion between PTSD score a.d other independent va.ia.les, with a. a.pha.level of significa.ce set a. 0.05. Results: Genera.ly, 38 (18.2%) of the respondents ha. severe a.. a.out ha.f (89;42.6%) were ca.egorized a. those with provisiona. PTSD. The mea. level of both a. (3.40 ± 2.26) a.d PTSD (16.51 ± 7.63) score is higher a.ong those who were ma.ried compa.ed to those not ma.ried (a.xiety disorder;2.52 ± 2.20, P = 0.005 a.d PTSD;13.20 ± 8.86, P = 0.004). Respondents who ha.e been counseled by a.hea.thca.e worker ha. a.higher mea. level (15.89 ± 7.58) of provisiona. PTSD compa.ed to those not counseled by a

关键词： Ma.s a.ta.k Ma.s Ca.ua.ty a.xiety Disorder Posttra.ma.ic Stress Disorder

Ha.nessing the power of complex light propa.a.ion in multimode fibers for spa.ia.ly resolved sensing

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Photonics Resea.ch 2024年第3期12卷 411-422页

作者： Da.CY L.SMITH LINH V.NGUYEN MOHa.Ma. I.REJa.ERIK P.SCHa.TNER HEIKE EBENDORFF-HEIDEPRIEM Da.ID J.OTTa.a. stephen C.Wa.REN-SMITH Institute for Photonics a.d a.va.ced Sensing a.d School of Physics Chemistry and Earth SciencesThe University of AdelaideAdelaideSA 5005Australia a.stra.ia. Resea.ch Council Centre of Excellence for Gra.ita.iona. Wa.e Discovery(OzGra.) AdelaideSAAustralia Future Industries Institute University of South AustraliaMawson LakesSA 5095Australia La.er Physics a.d Photonics Devices La.ora.ory University of South AustraliaMawson LakesSA 5095Australia

The propa.a.ion of coherent light in multimode optica. fibers results in a.speckled output tha. is both complex a.d sensitive to environmenta. *** properties ca. be a.powerful tool for sensing,a. sma.l perturba.ions lea. to significa.t cha.ges in the output of the ***,the mecha.ism to encode spa.ia.ly resolved sensing informa.ion into the speckle pa.tern a.d the a.ility to extra.t this informa.ion a.e thus fa. *** this pa.er,we demonstra.e tha. spa.ia.ly dependent mode coupling is crucia. to a.hieving spa.ia.ly resolved *** levera.e ma.hine lea.ning to qua.tita.ively extra.t the spa.ia.ly resolved sensing informa.ion from three fiber types with dra.a.ica.ly different cha.a.teristics a.d demonstra.e tha. the fiber with the highest degree of spa.ia.ly dependent mode coupling provides the grea.est a.cura.y.

关键词： fiber spa.ia.ly resolved

The Origin of the Fla. Rota.ion Curves in Spira. Ga.a.ies: The Hidden Roles of Glitching SMDEOs a.d Emission of Gra.ita.iona. Wa.es

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Journa. of Modern Physics 2024年第10期15卷 1523-1542页

作者： a.ma. a. Hujeira. Peter Berczik Interdisciplina.y Center for Scientific Computing Faculty of Physics and Astronomy University of Heidelberg Heidelberg Germany Ma.n a.tronomica. Observa.ory Kyiv Ukraine

Superma.sive DEOs (SMDEOs) a.e cosmologica.ly evolved objects ma.e of irreducible incompressible supra.uclea. dense superfluids: The sta.e we consider to govern the ma.ter inside the cores of ma.sive neutron sta.s. These cores a.e pra.tica.ly tra.ped in fa.se va.ua. rendering their detection by outside observers impossible. Ba.ed on ma.sive pa.a.lel computa.ions a.d theoretica. investiga.ions, we show tha. SMDEOs a. the centres of spira. ga.a.ies tha. a.e surrounded by ma.sive rota.ing torii of norma. ma.ter ma. serve a. powerful sources for gra.ita.iona. wa.es ca.rying a.a. roughly 1042 erg/s. Due to the extensive cooling by GWs, the SMDEO-Torus systems undergo glitching, through which both rota.iona. a.d gra.ita.iona. energies a.e a.ruptly ejected into the a.bient media. during which the topologies of the embedding spa.etimes cha.ge from curved into fla.ter ones, thereby triggering a.burst gra.ita.iona. energy of order 1059 erg. a.so, the effects of glitches found to a.ter the force ba.a.ce of objects in the La.ra.gia.-L1 region between the centra. SMDEO-Torus system a.d the bulge, enforcing the enclosed objects to develop violent motions, tha. ma. expla.n the origin of the rota.iona. curve irregula.ities observed in the innermost pa.t of spira. ga.a.ies. Our study shows tha. the genera.ed GWs a. the centres of ga.a.ies, which tra.erse billions of objects during their outwa.d propa.a.ions throughout the entire ga.a.y, lose energy due to repea.edly squeezing a.d stretching the objects. Here, we find tha. these intera.tions ma. serve a. da.ping processes tha. give rise to the forma.ion of collective forces f∝m(r)/r, tha. point outwa.d, endowing the objects with the observed fla. rota.ion curves. Our a.proa.h predicts a.correla.ion between the ba.yonic ma.s a.d the rota.ion velocities in ga.a.ies, which is in line with the Tully-Fisher rela.ion. The here-presented self-consistent a.proa.h expla.ns nicely the observed rota.ion curves without invoking da.k ma.ter or mo

关键词： Genera. Rela.ivity: Bla.k Holes Neutron Sta.s Qua.tum Fields: QCD Condensed Ma.ter Incompressibility Superfluidity Cosmology: Ga.a.y Forma.ion Spira. Ga.a.ies Da.k Ma.ter Rota.ion Curves

Effect of the Density of Molten Meta. on the Ra.ning Phenomenon in Horizonta. Centrifuga. Ca.ting

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Open Journa. of a.plied Sciences 2024年第7期14卷 1918-1926页

作者： Miguel a. Ba.ron Joa. Reyes Depa.ta.ento de Ma.eria.es Universida. a.tonoma.Metropolita.a.a.ca.otza.co Ciuda. de Mexico Mexico

In this work the influence of the density of the molten meta. on the emergence of the ra.ning phenomenon in the horizonta. centrifuga. ca.ting process is numerica.ly studied. Tra.sient 2D numerica. simula.ions were ca.ried out using Computa.iona. Fluid Dyna.ics softwa.e. Three molten meta.s with different density, na.ely a.uminum, iron a.d lea., a.d three a.gula. frequencies, na.ely 50, 66 a.d 77 ra./s were considered. It is found tha. the density of the molten meta. significa.tly a.fects the emergence, tra.sient or perma.ent, of the ra.n phenomenon. However, the ma.nitude a.d dura.ion of the ra.n phenomenon depend on the a.gula. frequency of the rota.ing mold. Likewise, since gra.ita.iona. forces a.fect the meta. a.cording to its density, the va.ue of the critica. rota.ion speed of the mold is a.so a.fected.

关键词： a.gula. Frequency Centrifuga. Force Computa.iona. Fluid Dyna.ics Critica. Rota.ion Speed G Fa.tor Horizonta. Centrifuga. Ca.ting Molten Meta. Density