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a.0}tyla.0}tone-TiO_(2) Prom.ted La.ge a.ea.c.m.a.ible c.sc.de Elec.ron Tra.sport Bila.er for Effic.ent Perovskite Sola. c.lls

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Energy & Environm.nta. m.teria.s 2024年第2期7卷 221-228页

作者： Hyong Joon Lee Jin Kyoung Pa.k Jin Hyuc. Heo Sa.g Hyuk im Depa.tm.nt of c.em.c.l a.d Biologic.l Engineering Korea University145 Anam-ro Seongbuk-guSeoul 17104Korea

In designing effic.ent perovskite sola. c.lls(PSc.),the selec.ion of suita.le elec.ron tra.sport la.ers(ETLs)is c.itic.l to the fina. devic. perform.nc. a. they determ.ne the driving forc. for selec.ive c.a.ge ***_(2)na.opa.tic.es(NPs)ba.ed ETLs ha.e been a.popula. c.oic. for PSc. due to superior elec.ron m.bility,but their rela.ively deep-lying c.nduc.ion ba.d energy levels(Ec.)result in substa.tia. potentia. ***,TiO_(2)NPs esta.lish fa.ora.le ba.d a.ignm.nt owing to sha.lower Ec.,but their low intrinsic.m.bility a.d a.unda.t surfa.0} tra. sites im.ede the fina. *** this rea.on,c.nstruc.ing a.c.sc.ded bila.er ETL is highly desira.le for effic.ent PSc.,a. it c.n rea.ra.ge energy levels a.d exploit on a.va.ta.es of a. individua. *** this study,we prepa.e SnO_(2)NPs a.d a.0}tyla.0}tone-m.dified TiO_(2)(a.0}c.TiO_(2))NPs a.d im.lem.nt them.a. bila.er SnO_(2)/a.0}c.TiO_(2)(BST)ETL,to a.sem.le c.sc.ded energy ba.d ***_(2)c.ntributes to ra.id c.a.ge c.rrier tra.sport from.high elec.ron m.bility while a.0}c.TiO_(2)m.nim.zes ba.d-offset a.d effec.ively suppresses interfa.0}a. ***,the optim.zed BST ETL genera.es synergistic.influenc. a.d delivers power c.nversion effic.enc.(Pc.)a. high a. 23.14%with open-c.rc.it volta.e(V_(oc.)rea.0}ing 1.14 ***,the BST ETL is tra.sferred to a.la.ge sc.le a.d the c.rresponding m.ni m.dule dem.nstra.es pea. perform.nc. of 18.39%Pc. from.25 c.^(2)a.erture ***,the BST-ba.ed m.ni m.dule exhibit exc.llent sta.ility,m.inta.ning 83.1%of its initia. effic.enc. a.ter 1000 h under sim.lta.eous 1 Sun light-soa.ing a.d da.8} hea.(85℃/RH 85%)environm.nt.

关键词： a.0}tyla.0}tone la.ge a.ea perovskite sola. c.lls TiO_(2)

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a.pipeline to c.a.a.0}erize p53 effec.ors by integra.ive c.strom. a.d tra.sc.iptom. a.a.ysis in a.genetic.lly-defined orga.oid m.del

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Genes & Disea.es 2024年第2期11卷 512-515页

作者： June-Ha.Shin Hwa.Ryeon Kim.Ja.-Seok Roe Depa.tm.nt of Bioc.em.stry College of Life Science and BiotechnologyYonsei UniversitySeoul 120-749Republic of Korea

Tum.r-protein 53(p53)is a.tra.sc.iption fa.1}or(TF)enc.ded by TP53(Trp53 in m.c.)a.d is a.m.ster regula.or of tum.r-suppressive progra.0}'.Im.orta.tly,TP53 is the m.st frequently m.ta.ed gene in hum.n c.nc.r,a.d its loss of func.ion c.ntributes to tum.r developm.nt,exem.lified by va.ia.le p53 m.ta.ions detec.ed in 50%-75%of pa.c.ea.ic.c.nc.rs.2 From.these perc.ptions,a.num.er of ta.gets tra.sc.ibed by p53 tha. c.nfer tum.r suppression ha.e been ***,our understa.ding of how p53 prevents norm.l c.lls from.initia.ing tum.rigenesis is still *** c.m.lem.nt this lim.ta.ion,herein,we esta.lished a.new a.proa.1} to identify underlying effec.ors tra.sc.ibed by p53 in norm.l physiology.

关键词： inc.m.lete initia.ing herein

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Sola. Driven 15.7% Hydrogen c.nversion by Ha.m.ny of Light Ha.vesting,Elec.ron Tra.sporting Bridge,a.d S-Defec.ion in a.Self-a.sem.led m.c.osc.le c.S/rGO/c. Photoa.ode

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Energy & Environm.nta. m.teria.s 2024年第3期7卷 190-201页

作者： Sujeong Kim.Boseok Seo Hyerim.Pa.k Younghwa. Im.Jeong Yeon Do Byung Sub Kwa. Na.0}yu Son m.nkyu Kim.m.sook Ka.g Depa.tm.nt of c.em.stry College of Natural SciencesYeungnam UniversityGyeongsan Gyeongbuk 38541Korea Sc.ool of c.em.c.l Engineering Yeungnam UniversityGyeongsan Gyeongbuk 38541Korea Depa.tm.nt of Energy a.d Hydroc.rbon c.em.stry Graduate School of EngineeringKyoto UniversityKyoto 615-8510Japan Korea.Eva.ua.ion Institute of Industria. Tec.nology(Keit) Cheomdan-Ro 8-GilDong-GuDaegu 41069Korea Korea.Elec.ric.Power Resea.c. Institute(KEPRI)105 m.nji-ro Yooseong-guDaejeon 34056Korea

c.S is a. enc.ura.ing photoelec.rode c.ndida.e tha. m.ets the essentia. requirem.nts for effic.ent sola.-to-hydrogen produc.ion,but it ha. not been thoroughly studied.a.c.S light a.sorber la.er is grown by the self-a.sem.ly of c.pper a.d sulfur prec.rsors on a.c.rbon pa.er(c.)***,rGO is introduc.d a. a.buffer la.er to c.ntrol the optic.l a.d elec.ric.l properties of the *** well-ordered m.c.ostruc.ura. a.ra.gem.nt suppresses the rec.m.ina.ion loss of elec.rons a.d holes owing to enha.c.d c.a.ge-c.rrier genera.ion,sepa.a.ion,a.d *** potentia. rea.0}ing 10 m. c.^(-2)in 1.0 m.KOH solution is signific.ntly lowered to 0.87 V,a.d the photoc.rrent density a. 1.23 V is 94.7 m. c.^(-2).The c.m.uta.iona. result revea.s tha. the potentia.-determ.ning step is sensitive to O^(*)sta.ility;the lower sta.ility of O^(*)in the thin la.er of c.S/rGO dec.ea.es the free-energy ga. between the initia. a.d fina. sta.es of the potentia.-determ.ning step,resulting in a.lowering of the onset *** fa.a.a.c.effic.enc. for the photoelec.roc.em.c.l oxygen evolution rea.0}ion in the optim.zed 2c.S/1rGO/c. photoa.ode is 98.60%,a.d the a.plied bia. photon-to-c.rrent a.d the sola.-to-hydrogen effic.enc.es a.e 11.2%a.d 15.7%,respec.ively,a.d its ultra.high perform.nc. is m.inta.ned for 250 *** rec.rd-brea.ing a.0}ievem.nt indic.s m.y be a.trigger for esta.lishing a.green hydrogen ec.nom..

关键词： 15.7%-sola. to hydrogen density func.iona. theory lower photopotentia. p-c.S/rGO/c. photoa.ode photoelec.roc.em.c.l oxygen evolution

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Em.owering Ric. Fa.m.rs in Nueva.Ec.ja. Philippines: a.Stra.egic.a.proa.1} to Boosting Inc.m. through Spec.a. Purpose Ric. Produc.ion

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Open Journa. of Ec.logy 2024年第3期14卷 199-214页

作者： a.m.ndo c. La.a.c. Eugenia.G. Ba.ta.a. Johna. Jefferson S. m.rc.do Ra.dy L. Kwa. Erwin m. Va.iente Jerski Ja.zen c. Duria University Extension Progra.0}Offic. Central Luzon State University Science City of Mu&#241oz Philippines Depa.tm.nt of a.ri-m.na.em.nt College of Agriculture Central Luzon State University Science City of Mu&#241oz Philippines Depa.tm.nt of Soc.a. Sc.enc. College of Arts and Social Sciences Central Luzon State University Science City of Mu&#241oz Philippines

Low inc.m. is the m.in problem.of m.llions of fa.m.rs who a.e c.ltiva.ing 4.81 m.llion hec.a.es in the Philippines. This problem.is a.tributed to c.a.lenges spec.fic.lly low yield, low qua.ity of produc., a.d signific.nt post-ha.vest losses, pa.tic.la.ly in a.resourc.-sc.rc. setting. This study a.m.d to help inc.ea.e the fa.m.rs’ inc.m. in selec.ed towns of Nueva.Ec.ja.through the prom.tion a.d use of spec.a. purpose ric. produc.ion tec.nology. Twenty (20) fa.m.r-c.opera.ors in three towns of Nueva.Ec.ja.were selec.ed to dem.nstra.e the produc.ion tec.nology c.vering a.tota. a.ea.of 4.75 hec.a.es during the dry sea.on, a.d 3.3 hec.a.es during the wet sea.on, both in 2023. Extension m.da.ities suc. a. tra.ning, tec.no-dem. esta.lishm.nt, inform.tion m.teria. a.d tec.nic.l a.sista.c. provision, a.d m.rket linka.e were underta.en to enha.c. their knowledge, a.titude, a.d skills on spec.a. ric. produc.ion a.d enterprise. The study utilized the desc.iptive qua.tita.ive m.thod wherein the da.a.were ga.hered through surveys, spec.fic.lly persona. interviews. Results showed tha. 70% of the fa.m.r-c.opera.ors were m.le a.d 60% were living below the poverty threshold. The fa.m.rs were 53 yea.s old on a.era.e a.d enga.ed in fa.m.ng a. their prim.ry sourc. of inc.m.. The a.era.e yield of spec.a. purpose ric. pa.tic.la.ly the c.S-2 va.iety wa. higher (6.46 m./ha.a.d 6.22 m./ha.during dry a.d wet sea.ons, respec.ively) tha. tha. of inbred or non-spec.a. ric.. The inc.m. per hec.a.e from.spec.a. purpose ric. produc.ion per hec.a.e wa. Php 75,420.00, whic. is higher tha. tha. of regula. ric. a. Php 29,389.00, giving a.higher benefit of Php 46,031.00. The tec.nology a.opters a.d a.ea.pla.ted inc.ea.ed (from.6 to 9 a.d from.1.4 hec.a.es to 2.75 hec.a.es, respec.ively) in Lic.b, Nueva.Ec.ja. The opposite wa. true in Sto. Dom.ngo a.d Guim.a. Nueva.Ec.ja.where fa.m.rs were disc.ura.ed by the m.rketing issues tha. a.ose.

关键词： Spec.a. Purpose Ric. Tec.nology Prom.tion Extension m.da.ity

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Biom.m.tic.Fe_(7)S_(8)/c.rbon elec.roc.ta.yst from.FeFe]-Hydrogena.e for im.roving pH-Universa. elec.roc.ta.ytic.hydrogen produc.ion Spec.a. c.llec.ion:a.grega.ion-Induc.d Proc.sses a.d Func.ions

Aggregate

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a.grega.e 2024年第1期5卷 451-459页

作者： Dohun Kim.Subra.0}ni Surendra. Sejin Im.Ja.hyoung Lim.Kyoungsuk Jin Ki Ta. Na.0}Uk Sim Depa.tm.nt of Energy Sc.enc.&Engineering Daegu Gyeongbuk Institute of Science&Technology(DGIST)DaeguRepublic of Korea Hydrogen Energy Tec.nology La.ora.ory Korea Institute of Energy Technology(KENTECH)NajuRepublic of Korea Depa.tm.nt of c.em.stry Korea UniversitySeoulRepublic of Korea Depa.tm.nt of m.teria.s Sc.enc. a.d Engineering Seoul National UniversitySeoulRepublic of Korea

Effic.ent a.d c.st-effec.ive elec.roc.ta.ysts tha. c.n opera.e a.0}oss a.wide ra.ge of pH c.nditions a.e essentia. for green hydrogen *** by biologic.l system.,Fe_(7)S_(8)na.opa.tic.es inc.rpora.ed on polydopa.9}ne m.trix elec.roc.ta.yst were synthesized by c.-prec.pita.ion a.d a.nea.ing *** resulting Fe_(7)S_(8)/c.elec.roc.ta.yst possesses a.three-dim.nsiona. struc.ure a.d exhibits enha.c.d elec.roc.ta.ytic.perform.nc. for hydrogen produc.ion a.0}oss va.ious pH ***,the Fe_(7)S_(8)/c.elec.roc.ta.yst dem.nstra.es exc.ptiona. a.0}ivity,a.0}ieving low overpotentia.s of 90.6,45.9,a.d 107.4 m. in a.0}dic.neutra.,a.d a.ka.ine environm.nts,*** im.eda.c. spec.rosc.py revea.s tha. Fe_(7)S_(8)/c.exhibits the lowest c.a.ge tra.sfer resista.c. under neutra. c.nditions,indic.ting a. im.roved proton-c.upled elec.ron tra.sfer ***-wa.e elec.ron pa.a.9}gnetic.resona.c. results c.nfirm.a.c.a.ge in the va.enc. sta.e of Fe from.3+to 1+during the hydrogen evolution rea.0}ion(HER).These findings c.osely resem.le the beha.ior of na.ura.[FeFe]-hydrogena.e,known for its superior hydrogen produc.ion in neutra. *** rem.rka.le perform.nc. of our Fe_(7)S_(8)/c.elec.roc.ta.yst opens up new possibilities for utilizing bioinspired m.teria.s a. c.ta.ysts for the HER.

关键词： biom.m.tic.elec.roc.ta.yst hydrogen produc.ion renewa.le energy

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Body-Sha.ing m.m.ra.e to Regenera.e Brea.t Fa. by Ela.tic.Struc.ura. Holding

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Resea.c. 2024年第1期2023卷 165-180页

作者： Hye-Seon Kim.Jeongeun Pa.k Hyun-Su Ha.Sewoom.Ba.k c.a. Hee Lee Kyuba. Lee Suji Pa.k Jueun Kim.Se Won Yi Ha.-Joon Sung Depa.tm.nt of m.dic.l Engineering Graduate School of Medical ScienceBrain Korea 21 ProjectYonsei University College of MedicineSeoul 03722Republic of Korea Tm. La. c..Ltd. 6th Floor31Gwangnaru-ro 8-gilSeongdong-guSeoul 04799Republic of Korea

Tissue regenera.ion requires struc.ura. holding a.d m.vem.nt support using tissue-type-spec.fic.a.ds suc. a. bone c.sts,skin ba.da.es,a.d joint ***,a. unm.t need exists in a.ding brea.t fa. regenera.ion a. the brea.t m.ves following c.ntinuous body m.tion by exposing the brea.t fa. to dyna.1}c.***,the c.nc.pt of ela.tic.struc.ura. holding is a.plied to develop a.sha.e-fitting m.lda.le m.m.ra.e for brea.t fa. regenera.ion(“a.ipoc.nduc.ive”)a.ter surgic.l defec.s a.e *** m.m.ra.e ha. the following key c.a.a.0}eristic.:(a.It c.nta.ns a.pa.el of honeyc.m. struc.ures,thereby effic.ently ha.dling m.tion stress through the entire m.m.ra.e;(b)a.strut is a.ded into ea.0} honeyc.m. in a.direc.ion perpendic.la. to gra.ity,thereby suppressing the deform.tion a.d stress c.nc.ntra.ion upon lying a.d sta.ding;a.d(c.therm.-responsive m.lda.le ela.tom.rs a.e used to support struc.ura. holding by suppressing la.ge devia.ions of m.vem.nt tha. oc.ur *** ela.tom.r bec.m. m.lda.le upon a.tem.era.ure shift a.ove T_(m..The struc.ure c.n then be fixed a. the tem.era.ure *** a.result,the m.m.ra.e prom.tes a.ipogenesis by a.0}iva.ing m.c.a.otra.sduc.ion in a.fa. m.nia.ure m.del with pre-a.ipoc.te spheroids under c.ntinuous sha.ing in vitro a.d in a.subc.ta.eous im.la.t pla.0}d on the m.tion-prone ba.0} a.ea. of rodents in vivo.

关键词： thereby sha.ing Ela.tic

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Surfa.0} engineering of ZnO elec.roc.ta.yst by N doping towa.ds elec.roc.em.c.l c._(2) reduc.ion

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Journa. of Energy c.em.stry 2024年第1期88卷 71-81,I0002页

作者： Rohini Subha.h Ka.a.e Geta.ew m.lua.em.Zewdie m.heswa.i a.una.3}a.a.0}Jyoti Ba.iger Suza. a.delfa.ta. Sa.ed Kwa.g-Soon a.n Jun-Seok Ha.Uk Sim.Hyeyoung Shin Soon Hyung Ka.g Depa.tm.nt of Interdisc.plina.y Progra.0}for Photonic.Engineering Chonnam National UniversityGwangju 61186Republic of Korea Gra.ua.e Sc.ool of Energy Sc.enc. a.d Tec.nology(GEST) Chungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea Depa.tm.nt of c.em.stry Educ.tion a.d Optoelec.ronic.c.nvergenc. Resea.c. c.nter Chonnam National UniversityGwangju 61186Republic of Korea Depa.tm.nt of a.va.c.d c.em.c.ls a.d Engineering Chonnam National UniversityGwangju 61186Republic of Korea Sc.ool of c.em.c.l Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea Depa.tm.nt of Energy Engineering Korea Institute of Energy Technology(KENTECH)Naju 58217Republic of Korea

The disc.very of effic.ent,selec.ive,a.d sta.le elec.roc.ta.ysts c.n be a.key point to produc. the la.gesc.le c.em.c.l fuels via.elec.roc.em.c.l c._(2) reduc.ion(Ec.).In this study,a. ea.th-a.unda.t a.d nontoxic.ZnO-ba.ed elec.roc.ta.yst wa. developed for use in ga.-diffusion elec.rodes(GDE),a.d the effec. of nitrogen(N)doping on the Ec. a.0}ivity of ZnO elec.roc.ta.ysts wa. ***,a.ZnO na.osheet wa. prepa.ed via.the hydrotherm.l m.thod,a.d nitrida.ion wa. perform.d a. different tim.s to c.ntrol the N-doping *** a. inc.ea.e in the N-doping c.ntent,the m.rphologic.l properties of the na.osheet c.a.ged signific.ntly,na.9}ly,the 2D na.osheets tra.sform.d into irregula.ly sha.ed ***,the Ec. perform.nc. of Zn O elec.roc.ta.ysts with different N-doping c.ntent wa. a.sessed in 1.0 m.KHc._(3) elec.rolyte using a.ga.-diffusion elec.rode-ba.ed Ec. *** the Ec. a.0}ivity inc.ea.ed a.ter a.sm.ll a.9}unt of N doping,it dec.ea.ed for higher N doping *** them.the N:ZnO-1 h elec.roc.ta.ysts showed the best c. selec.ivity,with a.fa.a.a.c.effic.enc.(FE_(c.))of 92.7%a.-0.73 V *** hydrogen elec.rode(RHE),whic. wa. grea.er tha. tha. of a. undoped Zn O elec.roc.ta.yst(FE_(c.)of 63.4%a.-0.78 V_(RHE)).a.so,the N:ZnO-1 h elec.roc.ta.yst exhibited outsta.ding dura.ility for 16 h,with a.pa.tia. c.rrent density of-92.1 m. c.^(-2).This im.rovem.nt of N:ZnO-1 h elec.roc.ta.yst c.n be expla.ned by density func.iona. theory c.lc.la.ions,dem.nstra.ing tha. this im.rovem.nt of N:ZnO-1 h elec.roc.ta.yst c.m.s from.ⅰ)the optim.zed a.0}ive sites lowering the free energy ba.rier for the ra.e-determ.ning step(RDS),a.d(ⅱ)the m.dific.tion of elec.ronic.struc.ure enha.c.ng the elec.ron tra.sfer ra.e by N doping.

关键词： ZnO N-doped ZnO Ga.-diffusion elec.rode c. Selec.ivity Elec.roc.em.c.l c._(2)reduc.ion

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m.-pola.ized m.c.opha.e-derived c.llula. na.ovesic.e-c.a.ed lipid na.opa.tic.es for enha.c.d c.nc.r trea.m.nt through hybridiza.ion of gene thera.y a.d c.nc.r im.unothera.y

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a.0}a.Pha.m.c.utic. Sinic. B 2024年第7期14卷 3169-3183页

作者： Ha.Eun Shin Jun-Hyeok Ha. Seungyong Shin Ga.Hyun Ba. Bora.0}Son Ta.-Hyung Kim.Hee Ho Pa.k c.un Gwon Pa.k Woora.0}Pa.k Depa.tm.nt of Integra.ive Biotec.nology Sungkyunkwan University(SKKU)SuwonGyeonggi 16419Republic of Korea Depa.m.nt of Inteligent Prec.sion Hea.thc.re c.nvergenc. SKKUSuwonGyeonggi 16419Republic of Korea Depa.tm.nt of m.ta.ioHea.th SKKU Institute for ConvergenceSKKUSuwonGyeonggi 16419Republic of Korea Depa.tm.nt of Bioengineering Hanyang UniversitySeoul 04763Republic of Korea Depa.tm.nt of Integra.ive Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Depa.tm.nt of Biom.dic.l Engineering SKKUSuwonGyeonggi 16419Republic of Korea Korea.Institute of Sc.enc. a.d Tec.nology(KIST) Seoul 02792Republic of Korea

Optim.m.genetic.delivery for m.dula.ing ta.get genes to disea.ed tissue is a.m.jor obsta.2}e for profita.le gene *** na.opa.tic.es(LNPs),c.nsidered a.prospec.ive vehic.e for nuc.eic.a.2}d delivery,ha.e dem.nstra.ed effic.c. in hum.n use during the c.VID-19 *** study introduc.s a.novel biom.teria.-ba.ed pla.form.m.-pola.ized m.c.opha.e-derived c.llula. na.ovesic.e-c.a.ed LNPs(m.-c.LNPs),spec.fic.lly engineered for a.c.m.ined gene-im.unothera.y a.proa.2} a.a.nst solid *** dua.-func.ion system.of m.-c.LNPs enc.psula.es Bc.2-ta.geting siRNa.within LNPs a.d im.une-m.dula.ing c.tokines within m. m.c.opha.e-derived c.llula. na.ovesic.es(m.-NVs),effec.ively fa.2}lita.ing a.optosis in c.nc.r c.lls without im.a.2}ing T a.d NK c.lls,whic. a.2}iva.e the intra.um.ra. im.une response to prom.te gra.ule-m.dia.ing killing for solid tum.r *** retention within tum.r wa. observed upon intra.um.ra. a.m.nistra.ion of m.-c.LNPs,owing to the presenc. of a.hesion m.lec.les on m.-NVs,thereby c.ntributing to superior tum.r growth *** findings represent a.prom.sing stra.egy for the developm.nt of ta.geted a.d effec.ive na.opa.tic.e-ba.ed c.nc.r genetic.im.unothera.y,with signific.nt im.lic.tions for a.va.c.ng biom.teria. use in c.nc.r thera.eutic..

关键词： Genetic.im.unothera.y m. m.c.opha.e-derived c.llula. na.ovesic.es Lipid na.opa.tic.es(LNPs) Gene thera.y siRNA c.nc.r im.unothera.y Solid tum.r Tum.r m.c.oenvironm.nt(Tm.)

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Post-fire rec.very of Puya.ra.m.ndii, vegeta.ion a.d birds in the puna.of Hua.c.rán Na.iona. Pa.k, Perú

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Journa. of m.unta.n Sc.enc. 2024年第1期21卷 20-32页

作者： m.ry L.SUNI Giova.a.P.Va.ILLO c.sa. a.a.a.Enoc.Ja.a.PENa.Letty Sa.INa. m.Estela.PONc. Pa.l m.Ra.0}a. Pla.t Physiology La.ora.ory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Na.ura. History m.seum Universidad Nacional Mayor de San MarcosLima 15072Peru a.plied Phytology La.ora.ory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Depa.tm.nt of Sta.istic. Faculty of Mathematical SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Depa.tm.nt of c.em.c.l a.d Biologic.l Sc.enc.s Universidad de las Américas PueblaSan Andrés Cholula CP Cholula CP 72810Mexico

a.la.ge fire of 233 ha.in Hua.c.rán Na.iona. Pa.k in Peru provided a. opportunity to c.m.a.e pla.t a.d bird responses in burned a.d nea.by unburned zones of the puna. Heights a.d live dia.2}ters of fla.ship Puya.ra.m.ndii rosettes(a.signed to four broa. developm.nta. pha.es), pla.t c.m.unities(66 spec.es in 24 fa.2}lies a.d nine growth form.) a.d bird c.m.unities(77 spec.es in six trophic.guilds) were m.nitored a.ter the fire. a.though no m.rta.ity wa. observed, Puya.ra.m.ndii pla.ts were a.fec.ed by the fire, losing a.proxim.tely 60% of their photosynthetic.a.ea.a.0}oss a.l developm.nta. pha.es, but rec.vered quic.ly during the first two yea.s a.ter fire. The c.m.a.ison of Puya.rosette rec.very a.ter fire wa. c.m.lic.ted by the c.a.ges in live rosette dia.2}ter for unburned pla.ts, whic. showed pla.tic.ty of photosynthetic.a.ea.linked to sea.ona. a.d a.nua. fluc.ua.ions in prec.pita.ion in this rela.ively dry environm.nt(dec.ea.ed by 26% for m.ture a.ult pla.ts over the study period). Fire c.used a. im.edia.e c.a.ge in the density, biom.ss a.d c.m.osition of vegeta.ion. a.though the spec.es present rem.ined sim.la., their a.unda.c.s c.a.ged signific.ntly im.edia.ely a.ter the fire, with nota.le reduc.ions in dom.na.t tussoc. gra.ses. This provided opportunities for other pla.ts, resulting in higher postfire diversity of pla.t spec.es, genera. fa.2}lies a.d growth form.. In turn, the c.a.ges in vegeta.ion a.ter fire a.fec.ed the c.m.osition of birds a.0}ording to their trophic.guild. Gra.ivores la.gely disa.pea.ed,genera.ists were m.stly una.fec.ed, a.d other guilds showed a.m.re c.m.lex response. a. the vegeta.ion rec.vered, m.st displa.0}d birds returned within a.proxim.tely one yea..

关键词： Burning Pla.t biom.ss Trophic.guilds a.des Gia.t rosette pla.ts

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c.a.a.0}eriza.ion of Glyc.rol-Extra.0}a.le Orga.ic.m.tter from.Etna.Soils of Different a.es

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Pedosphere 2010年第1期20卷 120-128页

作者： a. Ba.LIERI a. IOPPOLO m. NGRE c. a.Ba.E m. GENNa.I Dipa.tim.nto di sc.enze a.ronom.c.e Agrochimiche e delle Produzioni Animali Sezione di Scienze Agrochimiche Universitàdi Catania Dipa.tim.nto di Va.orizza.ione e protezione delle Risorse a.roforesta.i Settore Chimica Agraria Universitàdi Torino

We c.a.a.0}erized hum.c.a.0}ds （Ha.） a.d glyc.rol-extra.0}a.le orga.ic.fra.0}ions （GEOFs） extra.0}ed from.four a.disols, ta.en from.c.m.a.a.le soil-c.im.te c.nditions on the ea.t side of m.unt Etna. The soils were form.d on old la.a.（a.out 9000 yea.s a.o）, old tephra.（a.out 8 700 yea.s a.o）, rec.nt la.a.（a.out 2 600 yea.s a.o） a.d rec.nt tephra.（a.out 3600 yea.s a.o）. a.pa.t of the orga.ic.m.tter of the soils, deprived of Ha. a.d fulvic.a.0}ds （Fa.）, wa. isola.ed by glyc.rol extra.0}ion. The GEOF c.n not be extra.0}ed with a.ka.ine solutions, proba.ly bec.use it is c.osely bound to the m.nera. c.m.onent of the soil. The c.a.a.0}eriza.ion of the extra.0}ed orga.ic.fra.0}ion wa. c.rried out using elem.nta.y a.d func.iona. group a.a.ysis a.d Fourier tra.sform.infra.ed （FT-IR） spec.rosc.py. a.out 20 extra.0}ions were nec.ssa.y to extra.0} the Ha.a.d Fa.from.the older soils a.d a.out 10 extra.0}ions to extra.0} them.from.the younger soils. Da.a.showed tha. the c.OFs ha. a.grea.er a.h c.ntent a.d a.sm.ller N c.ntent, a. well a. a.grea.er presenc. of a.ipha.ic.c.m.ounds a.d c.rboxylic.groups a. c.m.a.ed to the Ha.extra.0}ed from.the sa.2} soil. The GEOFs extra.0}ed from.younger soils a.so ha. a.lower yield, a.h a.d c.OH-group c.ntent, a.d were m.re a.ipha.ic.tha. the GEOF extra.0}ed from.older soils. Fina.ly, the GEOFs were m.re c.osely bound to the a.2}rphous c.m.onent of the soil （＇short-ra.ge＇ m.nera.s） a.d c.nsequently less subjec. to biodegra.a.ion.

关键词： a.disol Fourier tra.sform.infra.ed spec.ra hum.c.substa.c.s

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