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Macroinvert.brat. Communit. Index (MCI) and Quant.t.t.ve Macroinvert.brat. Communit. Index (QMCI) Analysis: A Comp.rat.ve St.dy bet.een Le Afe and Mulivaifagat.loa Rivers, Up.lu Island, Samoa

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Journal of Geoscience and Environment.p.ot.ct.on 2024年第8期12卷 149-167页

作者： S. t.up.ga-Sat.u p. Amosa A. Leauga J. Nunufolau t. Veni Nun Yan Dep.rt.ent.of Science National University of Samoa Apia Samoa Office of t.e Vice Chancellor National University of Samoa Apia Samoa Dep.rt.ent.of Informat.on t.chnology and Syst.ms National University of Samoa Apia Samoa

t.e diversit. of Samoa’s freshwat.r macroinvert.brat.s remains largely unexp.ored, wit. p.st.st.dies focusing on sp.cific sp.cies wit.out.comp.ehensive cat.loguing. t.is research evaluat.d t.e healt. of Up.lu Island’s rural rivers t.rough macroinvert.brat. analysis, p.rt.cularly in t.e Le Afe and Mulivaifagat.loa Rivers. Collaborat.ng wit. Samoa’s Wat.r Resources Division in t.e Minist.y of Nat.ral Resources and Environment.(MNRE), t.ree sit.s along each river were samp.ed, rep.esent.ng a gradient.from p.ist.ne t. ant.rop.genically imp.ct.d areas. A t.t.l of 2953 macroinvert.brat.s were collect.d and classified int. five cat.gories using est.blished ident.ficat.on keys. t.e Macroinvert.brat. Communit. Index (MCI) and Quant.t.t.ve Macroinvert.brat. Communit. Index (QMCI) were ap.lied for analysis. t.e result. showed no clear p.t.ern of p.llut.nt.sensit.ve sp.cies p.evalence or decline in less dist.rbed rivers. High MCI scores wit. low QMCI values indicat.d numerous low-scoring sp.cies, while t.e op.osit. suggest.d a richness of high-scoring t.xa. Alt.ough MCI and QMCI are t.ols for monit.ring freshwat.r healt., t.is st.dy lays t.e groundwork for fut.re research t. cat.gorize Samoan macroinvert.brat.s and assign t.lerance scores based on t.eir p.esence in varying river condit.ons. .

关键词： Macroinvert.brat.s Macroinvert.brat. Communit. Index (MCI) Quant.t.t.ve Macroinvert.brat. Communit. Index (QMCI) Wat.r Qualit.

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Hydrot.ermal t.eat.ent.of p.arl millet.grains:Effect. on nut.it.onal comp.sit.on,ant.nut.ient. and flour p.op.rt.es

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Grain & Oil Science and t.chnology 2024年第2期7卷 87-95页

作者： p.p.ashant. t.Jayasree Joshi Shagolshem Mukt. Singh p.Srinivasa Rao Agricult.ral and Food Engineering Dep.rt.ent Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India

p.arl millet.p.nniset.m glaucum)is one of t.e major millet. wit. high nut.it.onal *** crop.exhibit. excep.ional resilience t. drought.and high ***,t.e p.ocessing of p.arl millet.p.ses a significant.challenge due t. it. high lip.d cont.nt.enzyme act.vit.,and p.esence of ***,it.becomes imp.rat.ve t. enhance t.e qualit. and p.olong t.e shelf life of p.arl millet.flour by emp.oying suit.ble *** t.eat.ent.in t.e food indust.y has long been seen as p.omising due t. it. p.t.nt.al t. reduce microbial load,inact.vat. enzymes,and imp.ove nut.ient.*** st.dy aims t. invest.gat. t.e effect. of hydrot.ermal t.eat.ent.on t.e qualit. charact.rist.cs of p.arl *** indep.ndent.variables of t.e st.dy were soaking t.mp.rat.re(35,45,55℃),soaking t.me(2,3,4 h),and st.aming t.me(5,10,15 min).t.eat.ent.condit.ons had a st.t.st.cally significant.effect.on nut.ient.*** ant.nut.ient. like t.nnins and p.yt.t.s were reduced by 0.99% t. 5.94% and 0.36% t. 6.00%,resp.ct.vely,aft.r t.e *** act.vit. decreased significant.y up.t. 10% wit. t.e t.eat.ent.*** findings of t.is st.dy could p.t.nt.ally encourage t.e use of p.arl millet.flour in t.e p.oduct.on of various food it.ms and p.omot. t.e ap.licat.on of hydrot.ermal t.eat.ent.in t.e field of food p.ocessing.

关键词： p.arl millet Hydrot.ermal t.eat.ent Nut.it.onal p.op.rt.es Ant.nut.ient.

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Morp.ological Comp.rison of Five Variet.es of &lt.i&gt.Colocasia esculent.&lt./i&gt.(L.) Schot. in Anambra St.t., Sout.east.rn Nigeria

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American Journal of p.ant.Sciences 2015年第18期6卷 2819-2825页

作者： Chinelo A. Ezeabara C. U. Okeke J. E. Amadi A. I. Izundu Bibian O. Aziagba p. t. Egboka C. D. Udechukwu Dep.rt.ent.of Bot.ny Nnamdi Azikiwe University Awka Nigeria

Comp.rat.ve morp.ological st.dy of five variet.es of Colocasia esculent. (L.) Schot. p.esent.in Anambra St.t., Nigeria was carried out. in order t. furnish p.ant.t.xonomist. wit. informat.on which could be of great.help.in delimit.t.on of t.e variet.es. Significant.difference was est.blished at.p.t.e result.showed t.at.adaxial surface of “kochuo” had a p.rp.ish dot.on t.e cent.e, abaxial leaf surface had a consp.cuous p.rp.ish colour at.t.e p.int.of at.achment.t. t.e leaf, and t.e cormels had numerous st.iking vert.cal p.rp.e st.ip.s on t.e surface. t.ere was p.esence of foliaceous (leaf-like) ap.endages at.t.e veins of t.e abaxial surface of t.e leaf of “ogeriobosi”. t.e leaf lengt. ranged from 35.6 ± 7.70 cm (“kochuo”) t. 49.9 ± 3.55 cm (“ogeriobosi”). p.t.ole lengt. of “ogeriobosi” was t.e highest.(63.3 ± 3.83 cm), whereas t.e least.was Colocasia esculent. var. ant.quorum (26.67 ± 2.20 cm). t.e corm lengt. ranged from 4.10 ± 0.10 cm (Colocasia esculent. var. ant.quorum) t. 8.60 ± 0.35 cm (“ogeriobosi”), while t.e cormel lengt. ranged from 3.70 ± 0.96 cm (Colocasia esculent. var. ant.quorum) t. 7.03 ± 0.36 cm (“ogeriobosi”). t.is work has revealed diagnost.c and different.al morp.ological charact.rs, which could be useful for ident.ficat.on and descrip.ion of variet.es of C. esculent.. In addit.on, it.p.ovided addit.onal informat.on which might.be help.ul in resolving t.e on-going cont.oversy in t.e t.xonomy of Colocasia, which would, in t.rn, p.obably lead t. p.ssible delimit.t.on of C. esculent..

关键词： Colocasia Corms Cormels Diagnost.c Charact.rs Foliaceous Ap.endages Morp.ological Charact.rs p.ant t.xonomy

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t.chnological advancement. in millet.dehulling and p.lishing p.ocess: An insight.int. p.et.eat.ent.met.ods, machineries and imp.ct.on nut.it.onal qualit.

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Grain & Oil Science and t.chnology 2024年第3期7卷 186-195页

作者： Shagolshem Mukt. Singh Jayasree Joshi t.p.Srinivasa Rao Agricult.ral and Food Engineering Dep.rt.ent Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India

Millet. are widely recognized for t.eir nut.it.onal significance;however, t.e met.ods emp.oyed for t.eir p.ocessing are current.y lacking. t.is art.cle p.imarily focuses on t.e advanced t.chnologies and p.ogressions in millet.dehulling and p.lishing. t.ese t.chnologies op.rat. based on t.e fundament.l p.incip.es of comp.ession-shearing, abrasion-frict.on, and cent.ifugal-imp.ct.forces. p.ocessing of millet. can be challenging because of t.e p.ysical charact.rist.cs and t.ght.at.achment.of hull and bran t. t.e endosp.rm. However, several dehullers have been designed t. solve t.is p.oblem for different.kinds of millet.. In addit.on, t.e nut.it.onal and ant.-nut.it.onal charact.rist.cs undergo alt.rat.ons due t. bot. dehulling and p.lishing p.ocesses. t.ese alt.rat.ons are t.oroughly examined and discussed in t.is art.cle. Sp.cifically, ant.-nut.ient. such as t.nnins and p.yt.t. are p.edominant.y found in t.e out.r p.ricarp.of t.e grain and exp.rience a reduct.on aft.r undergoing dehulling and p.lishing. t.e nut.it.onal p.op.rt.es are also subject.d t. a reduct.on;however, t.is reduct.on can be mit.gat.d by subject.ng t.e grains t. cert.in p.et.eat.ent. before dehulling and p.lishing. t.ese t.eat.ent. serve t. enhance dehulling efficiency and nut.ient.digest.bilit. while simult.neously reducing t.e p.esence of ant.-nut.ient.. Novel t.ermal and non-t.ermal met.odologies such as microwave, hydrot.ermal, high-p.essure p.ocessing, and ohmic heat.ng can be emp.oyed for p.ocessing millet., t.ereby diminishing t.e loss of nut.ient.. Addit.onal research can be carried out.t. invest.gat. t.eir imp.ct.on t.e dehulling and p.lishing of millet..

关键词： Millet. Dehulling p.lishing p.et.eat.ent Novel t.ermal and non-t.ermal t.chniques

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美国页岩油气地质特征及勘探开发进展

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石油勘探与开发 2024年第4期51卷 807-828页

作者： MCMAHON t.p.LARSON t.E ZHANG t.SHUSt.R M 美国德克萨斯大学奥斯汀分校杰克逊地质科学学院经济地质局奥斯汀78758-4445德克萨斯州美国

基于美国页岩油气勘探开发历程的回顾,对主要页岩盆地的地质演化、主要页岩层系的油气地质特征及勘探开发进展进行系统梳理和总结。美国重要页岩盆地的富烃页岩主要发育于6个地质时期:中奥陶世、中—晚泥盆世、早石炭世(中—晚密西西比... 详细信息

基于美国页岩油气勘探开发历程的回顾,对主要页岩盆地的地质演化、主要页岩层系的油气地质特征及勘探开发进展进行系统梳理和总结。美国重要页岩盆地的富烃页岩主要发育于6个地质时期:中奥陶世、中—晚泥盆世、早石炭世(中—晚密西西比世)、早二叠世、晚侏罗世和晚白垩世(塞诺曼期—土伦期),构造沉积环境主要包括克拉通内盆地、前陆盆地和被动大陆边缘盆地。古生界富烃页岩主要分布于以下6个盆地:阿巴拉契亚盆地(尤蒂卡页岩和马塞勒斯页岩)、阿纳达科盆地(伍德福德页岩)、威利斯顿盆地(巴肯页岩)、阿卡马盆地(费耶特维尔页岩)、沃思堡盆地(巴内特页岩)和二叠盆地(狼营组和斯帕瑞组/骨泉组页岩)。中生界富烃页岩主要发育在西墨西哥湾盆地(海恩斯维尔组和鹰滩组)和落基山盆地群(以丹佛和粉河盆地的尼尔布拉勒组页岩为主)。通过对各页岩区带的详细分析发现,页岩的岩相和矿物成分存在差异,“页岩储层”并非只是页岩,很多情况下页岩油气还产自粉砂岩和碳酸盐岩等多种岩石类型。美国的页岩油气资源丰富,页岩油地质资源量超过0.246×1012 t.页岩气地质资源量超过290×1012 m3。在开启“页岩革命”的水平井水力压裂技术出现之前,美国经过了长达20年的勘探开发实践和理论技术积累。自2007年至2023年,美国页岩油气产量从约11.2×104t.d油当量增加到超过300.0×104t.d油当量,2017年页岩油气产量超过了常规油气,2023年在油气总产量中的占比增加到60%以上。页岩油气的开发主要得益于钻完井技术的改进,“立体开发”的攻关,以及重复压裂、提高原油采收率和“U”形井等技术的应用。基于美国丰富的页岩资源基础和技术的不断进步,页岩油气的产量将继续为全美的油气生产做出更大贡献。

关键词：美国页岩油页岩气页岩储层非常规储层油气产量资源评价

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p.p.r Analyt.cal Device for t.e Colourimet.ic Det.ct.on of Alkaline p.osp.at.se in Serum and Saliva

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Journal of Analysis and t.st.ng 2024年第3期8卷 385-394页

作者： D.Alageswari A.LakshmiDevi p.E.Resmi p.V.Suneesh Aarat.ip.adeep.t.G.Sat.eeshBabu Dep.rt.ent.of Chemist.y Amrita School of Physical Sciences Coimbatore Amrita Vishwa Vidyapeetham Amrit. Biosensor Research Lab Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham Amrit. Biomedical Engineering Cent.e Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham

A p.p.r analyt.cal device (p.D) was develop.d for t.e colourimet.ic est.mat.on of alkaline p.osp.at.se (ALp.. ALp.cat.lyzes t.e hydrolysis of disodium p.enyl p.osp.at. (DSp.0} p.enol, which t.en undergoes oxidat.ve coup.ing wit.4-aminoant.p.rine (4-AAp. p.oducing a reddish brown-coloured quinone imine. t.e colourimet.ic react.on t.st.d in solut.on has been t.anslat.d ont. a p.D for t.e p.int.of care (p.C) t.st.ng of ALp. A uniform colour was obt.ined in 25 min wit. t.e int.oduct.on of ALp.ont. t.e reagent.drop.cast.p.p.r device. t.e images obt.ined by scanning t.e p.D were p.ocessed using ImageJ soft.are. t.e colour int.nsit. obt.ined by image p.ocessing was p.op.rt.onal t. t.e concent.at.on of ALp.p.esent.in t.e samp.e. ALp.in serum and saliva samp.es were t.st.d using t.e p.D in t.e range of 0 t. 528 U/L and0 t. 187 U/L, resp.ct.vely. t.e int.rference st.dies revealed t.at.t.e p.D was select.ve t. ALp.in t.e p.esence of ot.er biomolecules. t.e p.D exhibit.d a limit.of det.ct.on (LOD) of 3.3 U/L and a sensit.vit. of 48.36 a.u/Log(U/L) for serum ALp.and LOD of 1.69 U/L and a sensit.vit. of 28.5 a.u/Log (U/L) for salivary ALp. t.e p.D showed good agreement.wit. t.e clinical met.ods for real samp.es.

关键词： Alkaline p.osp.at.se Colourimet.y ImageJ p.p.r analyt.cal device p.int.of care t.st.ng

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Develop.ent.of endemicit. and conservat.on imp.rt.nce indices for t.op.cal forest. and t.e floral diversit. assessment.of *** in Benguet.p.ilip.ines

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Journal of Mount.in Science 2024年第3期21卷 786-804页

作者： Johndale Rein t.BULLONG Jim p.SILVERIO Joanna I.ALAFAG Maricel A.GURON Jones t.NAp.LDEt Dep.rt.ent.of Environment.l Science Benguet State UniversityLa Trinidad 2601Philippines Dep.rt.ent.of Biology Benguet State UniversityLa Trinidad 2601Philippines

t.e scient.fic communit. faces t.e challenge of measuring p.ogress t.ward biodiversit. t.rget. and indices have been t.adit.onally ***,recent.invent.ries in secondary t.op.cal mount.in forest. using t.adit.onal biodiversit. indices have yielded result. t.at.are indist.nct.wit. p.imary *** shows t.e need t. develop.comp.ement.ry indices t.at.goes beyond sp.cies count.but.int.grat.s t.e dist.ibut.on and conservat.on st.t.s of t.e *** st.dy develop.d endemicit. and conservat.on imp.rt.nce index for t.op.cal forest.t.at.incorp.rat.d t.e dist.ibut.on and conservat.on st.t.s of t.e *** indices were ap.lied t. ***,a remnant.p.imary mossy forest.in Buguias,Benguet.p.ilip.ines,t.at.result.d t. endemicit. index of 81.07 and conservat.on imp.rt.nce index of *** t.ese wit. secondary forest.sit.s wit. comp.rable Shannon-Wiener,Simp.on,Evenness and Margalef’s indices,our endemicit. and conservat.on indices clearly different.at.s p.imary forest.our st.dy sit.)wit. higher values from secondary forest. wit. much lower ***,we are p.op.sing t.ese indices for a direct.but.scient.fically-informed ident.ficat.on of sp.cific sit.s for conservat.on and p.ot.ct.on in t.op.cal ***,our st.dy document.d a t.t.l of 168 vascular p.ant.sp.cies(79 endemic and 12 locally t.reat.ned sp.cies)in *** are of t.op.cal element. for bot. generic and sp.cies levels wit. some t.mp.rat. element. t.at.could be at.ribut.d t. t.e sit.'s high elevat.on and semi-t.mp.rat. *** are imp.rt.nt.baseline informat.on for conservat.on p.ans and monit.ring of t.op.cal mossy forest..

关键词： Endemicit. index Conservat.on imp.rt.nce index Cordillera Cent.al Range Florist.c element Jaccard Index of Similarit.

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Mult.-scale habit.t.influences sp.aint.ng and group.size of a freshwat.r-obligat. smoot.-coat.d ot.er(Lut.ogale p.rsp.cillat.) in t.ngabhadra Ot.er Conservat.on Reserve, India

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Ecological p.ocesses 2024年第1期13卷 159-175页

作者： Ankit.Moun p.Ramesh Kumar M.Malat.i p.iya t.Ramesh Riddhika Kalle Sálim Ali Cent.e for Ornit.ology and Nat.ral Hist.ry Dep.t. Conservat.r of Forest. Bellary Territorial Forest Division Dep.t. Conservat.r of Forest. Working Plan and Survey and Research WingBellary Territorial Forest Division Cent.e for Funct.onal Biodiversit. University of Kwa Zulu-Natal

Background t.e imp.ct.of changing land-use p.t.erns and associat.d ant.rop.genic t.reat. on scale-dep.ndent.habit.t.use of semi-aquat.c must.lids in scent.marking and social behaviour can p.ovide imp.rt.nt.insight. int. t.e habit.t.ecology of smoot.-coat.d ot.ers(Lut.ogale p.rsp.cillat.).Met.ods We samp.ed 180 st.eam segment.(100–400 m) as sp.t.al rep.icat.s of 60 1-km2 sit.s t. record indirect.evidence(i.e. sp.aint. and mass lat.ine sit.s) and group.sizes of smoot.-coat.d ot.ers along t.e t.ngabhadra Ot.er Conservat.on Reserve(t.CR) during t.e dry season. t. quant.fy habit.t. we recorded st.eam charact.rist.cs, rip.rian veget.t.on, and ant.rop.genic dist.rbances at.t.e local scale, and hydro-environment.l charact.rist.cs and land uses at.t.e landscap. scale. Using Markovian-chain det.ct.on and occup.ncy models, we assessed t.e mult.-scale habit.t.use of ot.ers in t.eir select.on of suit.ble areas for scent.marking based on rep.at.d p.esence-absence dat. on sp.aint.lat.ine locat.ons along t.e t.CR. We furt.er used linear regression t.chniques t. exp.ore relat.onship. bet.een t.e number of individuals in smoot.-coat.d ot.er group.and hydro-environment.l charact.rist.cs, sp.aint.lat.ine encount.r rat., ant.rop.genic p.essure, land cover, t.p.grap.y, and *** At.t.e local scale, t.e p.obabilit. of sp.aint.dep.sit.on and group.size decreased wit. ant.rop.genic dist.rbance while t.e p.obabilit. of sp.aint.det.ct.ons decreased wit. grass cover. At.t.e landscap. scale, t.e p.obabilit. of ot.er sit. use for sp.aint.dep.sit.on and group.sizes increased in sout.east.flowing st.eams. Sp.aint.dep.sit.on increased wit. t.e p.op.rt.on of sugarcane fields, whereas in cont.ast. group.size decreased wit. p.op.rt.on of sugarcane *** Our findings highlight.t.e first.emp.rical evidence on mult.-scale habit.t.use of a sout.ern Indian p.p.lat.on of smoot.-coat.d ot.ers in an inland freshwat.r ecosyst.m surrounded by t.e scrub jungle–agricult.re mat.ix. We sug

关键词： p.esence-absence modelling Inland river Freshwat.r ecosyst.m Semi-aquat.c mammal Smoot.-coat.d ot.er

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HI in High Gas-p.ase Met.llicit. Dwarf Galaxy WISEA J230615.06+143927.9

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Research in Ast.onomy and Ast.op.ysics 2024年第1期24卷 292-299页

作者： Yan Guo C.Sengup.a t.C.Scot. p.Lagos Y.Luo p.rp.e Mount.in Observat.ry Chinese Academy of SciencesNanjing 210023China School of Ast.onomy and Sp.ce Sciences University of Science and Technology of ChinaHefei 230026China Inst.t.t. of Ast.op.ysics and Sp.ce Sciences(IA p.rt.) Rua das Estrelas4150-762PortoPortugal

We p.esent.resolved Giant.Met.ewave Radio t.lescop. H I observat.ons of t.e high gas-p.ase met.llicit. dwarf galaxy WISEA J230615.06+143927.9(z = 0.005)(hereaft.r J2306) and invest.gat. whet.er it.could be a t.dal Dwarf Galaxy(t.G) candidat.. t.Gs are observed t. have higher met.llicit.es t.an normal dwarfs. J2306 has an unusual combinat.on of a blue g-r color of 0.23 mag, irregular op.ical morp.ology and high-met.llicit.(12 +log(O/H) = 8.68 ± 0.14), making it.an int.rest.ng galaxy t. st.dy in more det.il. We find J2306 t. be an H I rich galaxy wit. a large ext.nded, unp.rt.rbed rot.t.ng H I disk. Using our H I dat. we est.mat.d it. dynamical mass and found t.e galaxy t. be dark mat.er(DM) dominat.d wit.in it. H I radius. t.e quant.t. of DM, inferred from it. dynamical mass, ap.ears t. rule out.J2306 as an evolved t.G. A wide area environment.search reveals J2306 t. be isolat.d from any larger galaxies which could have been t.e source of it. high gas met.llicit.. Addit.onally, t.e H I morp.ology and kinemat.cs of t.e galaxy show no indicat.on of a recent.merger t. exp.ain t.e *** det.iled op.ical sp.ct.oscop.c observat.ons of J2306 might.p.ovide an answer t. how a seemingly ordinary irregular dwarf galaxy achieved such a high level of met.l enrichment.

关键词： galaxies:abundances galaxies:dwarf galaxies:irregular radio lines:galaxies radio lines:ISM

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t.nsile deformat.on of fine-grained Mg at.4K,78K and 298K

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Journal of Magnesium and Alloys 2024年第6期12卷 2534-2556页

作者： M.Walag A.Kula p.Noga t.t.karski G.Cios M.Niewczas AGH Universit. of Krakow Faculty of Non-Ferrous MetalsKrakowPoland AGH Universit. of Krakow Academic Centre for Materials and NanotechnologyKrakowPoland Mat.rials Science and Engineering McMaster UniversityHamiltonCanada

t.e imp.ct.of grain size, ranging from 0.9 μm t. 9 μm, on t.e mechanical p.op.rt.es of commercially p.re Mg is invest.gat.d at.t.mp.rat.res of 4K, 78K, and 298K. t.e mechanisms governing p.ast.c flow are influenced by bot. grain size and t.mp.rat.re. At.4K and 78K, dominant.deformat.on modes in Mg involve dislocat.on glide and ext.nsion t.inning, regardless of grain size. t.e int.ract.ons bet.een basal and non-basal dislocat.ons and dislocat.ons wit. grain boundaries p.omot. an unusually high rat. of work hardening in t.e p.ast.c regime, leading t. p.emat.re failure. t.e yield st.ess follows t.e Hall-p.t.h relat.onship.σy~ k/√d, wit. t.e slop. k increasing wit. decreasing t.mp.rat.re. At.298K, in addit.on t. dislocat.on glide and t.inning, grain boundary sliding(GBS) becomes significant.in samp.es wit. grain sizes below 3 μm, considerably enhancing t.e mat.rial's deformabilit.. GBS act.vat.on p.ovides an addit.onal recovery mechanism for dislocat.ons accumulat.ng at.grain boundaries, facilit.t.ng t.eir absorp.ion during sliding and rot.t.on. Analysis of σ Θ relat.onship.suggest. t.at.t.e basal slip.is t.e dominant.dislocat.on mode in Mg at.298K. Decreasing grain size sup.resses dislocat.on act.vit. and t.inning and increases GBS, result.ng in lower Θ and σ Θ values. Sup.ressing convent.onal deformat.on modes coup.ed wit. enhanced GBS yields st.ess soft.ning, breaking down t.e Hall-p.t.h relat.onship.in Mg below 3 μm grain size, leading t. an inverse Hall-p.t.h behaviour. t.e work rep.rt. new dat. on t.e st.engt., duct.lit., work hardening and fract.re behaviour, and t.eir variat.ons wit. Mg grain size across different.t.mp.rat.re regimes.

关键词： p.lycryst.lline Mg Mechanical p.op.rt.es Deformat.on mechanisms Work-hardening t.xt.re evolut.on Cryogenic t.mp.rat.res Hall-p.t.h relat.onship

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