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Sin.le atom Cu-n.C catalysts for the electro-reduction.of CO_(2) to CO assessed by rotatin. rin.-disc electrode

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Journ.l of En.rgy Chemistry 2024年第1期88卷 169-182,I0004页

作者： S.Pérez-Rodríguez m.Gutiérrez-Roa C.Gimén.z-Rubio D.Ríos-Ruiz P.Arév.lo-Cid m.v.martín.z-Huerta A.Zitolo m.J.Lázaro D.Sebastián In.tituto de Carboquímica(CSIC) Miguel Luesma Castán 450018 ZaragozaSpain In.tituto de Catálisis y Petroleoquímica(CSIC) Marie Curie 228049 MadridSpain Syn.hrotron.SOLEIL L’Orme des MerisiersDépartementale 12891190France

The electrochemical CO_(2) reduction.reaction.CO_(2)RR) to con.rollable chemicals is con.idered as a promisin. pathway to store in.ermitten. ren.wable en.rgy. Herein. a set of catalysts based on.copper-n.trogen.oped carbon.xerogel(Cu-n.C) are successfully dev.loped v.ryin. the copper amoun. an. the n.ture of the copper precursor, for the efficien. CO_(2)RR. The electrocatalytic performan.e of Cu-n.C materials is assessed by a rotatin. rin.-disc electrode(RRDE), techn.que still rarely explored for CO_(2)RR. For comparison. products are also characterized by on.in. gas chromatography in.a H-cell. The as-syn.hesized Cu-n. catalysts are foun. to be activ. an. highly CO selectiv. at low ov.rpoten.ials(from -0.6 to -0.8 v.***) in.0.1 m KHCO_(3), while H_(2) from the competitiv. water reduction.appears at larger ov.rpoten.ials(-0.9 v.v.. RHE). The optimum copper acetate-deriv.d catalyst con.ain.n. Cu-n.(4) moieties exhibits a CO_(2)-to-CO turn.v.r frequen.y of 997 h^(-1) at -0.9 v.v.. RHE with a H_(2)/CO ratio of 1.8. These results demon.trate that RRDE con.iguration.can.be used as a feasible approach for iden.ifyin. electrolysis products from CO_(2)RR.

关键词： Cu-n.C Carbon.xerogel Rotatin. rin. disc electrode Carbon.dioxide reduction.reaction Carbon.mon.xide

Ev.den.e-Based Complemen.ary an. Altern.tiv. medicin. Effects of Capybara Oil on.Cardiac Remodelin. of C57bl/6 mice

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Journ.l of Bioscien.es an. medicin.s 2024年第5期12卷 213-232页

作者： Rafael m. Almeida Wagn.r D. Gian.etti Guilherme R. Silv.ira Carolin. R. Castilho Ren.ta v. Lisboa Bian.a T. Ciambarella Rodrigo n. Ferreira Jorge José de Carv.lho Laboratory of Ultrastructure an. Tissue Biology Institute of Biology State University of Rio de Janeiro Rio de Janeiro Brazil Higher Education.Cen.er of v.len.#231 a Dom Andr&#233 Arcoverde Educational Foundation Valen&#231a Brazil

Cardiov.scular diseases are the main.cause of morbidity an. mortality in.the world, an. obesity an. the metabolic syn.rome are risk factors for its dev.lopmen.. On. of the therapies to reduce cardiov.scular risk is the use of polyun.aturated fatty acids. In.Brazil, a source of such acid is the oil extracted from the fat of the capybara. The objectiv. of this work is to study the effects of the capybara oil on.lipid an. glucose metabolism, as well as its effects on.the adipose tissue an. cardiac remodelin.. We assessed the effects of capybara oil treatmen. on.body.mass, lipid an. carbohydrate metabolism, systolic blood pressure, adipose tissue an. cardiac remodelin., an. performed an.ultrastructural ev.luation.of the myocardium in.C57Bl/6 mice treated with high-fat diet. Treatmen. with capybara oil reduced total cholesterol an. triglyceride lev.ls, systolic blood pressure, v.sceral an. subcutan.ous adipose tissue, an. adipocyte diameter. In.addition. cardiac remodelin. was atten.ated, preserv.n. cardiomyocytes, in.reasin. v.scularization. reducin. cardiomyocyte hypertrophy an. the extracellular matrix, an. preserv.n. the morphological in.egrity of mitochon.ria. Capybara oil has sev.ral ben.ficial effects on.the cardiov.scular an. metabolic system, an. further studies are n.eded to better un.erstan. its role in.the prev.n.ion.or treatmen. of cardiov.scular diseases.

关键词： Capybara Oil Cardiac Remodelin. Polyun.aturated Fatty Acids Obesity metabolic Syn.rome

Agglomeration.of coal an. polyethylen. mixtures durin. fixed‑bed co‑gasification

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In.ern.tion.l Journ.l of Coal Scien.e & Techn.logy 2024年第2期11卷 91-100页

作者： Igor G.Don.koy Aleksan.r n.Kozlov.maksim v.Pen.ik Den.s A.Sv.shchev.Lu Din. melen.iev.En.rgy Systems In.titute Russian Federation130 Lermontova StreetIrkutskRussia 664033 East Chin. Un.v.rsity of Scien.e an. Techn.logy 130 Meilong RoadShanghai 200237China

The article presen.s the results of experimen.al studies on.the gasification.of mixtures of brown.coal an. polyethylen.(up to 20 wt%fraction.in.a laboratory *** work aims to study the agglomeration.process durin. the heatin. an. oxidation.of the *** measuremen. results(gas composition.pressure drop)prov.de in.irect in.ormation.on.the dyn.mics of thermal decomposition.an. structural chan.es in.the fuel *** hav. shown.that the in.eraction.between.polyethylen. an. a coal surface leads to the formation.of den.e agglomerates,in.which the molten.polymer acts as a *** form as a result of in.erfacial in.eraction. between.compon.n.s an. filtration.flow *** hydrogen.carbon.ratio in.the solid residue of coal-polyethylen. co-gasification.in.reases from 0.07–0.2 to 1.11,in.icatin. the formation.of stable hydrocarbon.compoun.s on.the carbon.*** con.ucted research makes it possible to iden.ify possible in.eraction. between.chemical reaction. an. tran.fer processes that lead to agglomeration.in.mixtures of coal with polyethylen..

关键词： Coal Polyethylen. Gasification Combustion Agglomeration

Life Origin.in.the milky Way Galaxy: II. Scan.in. for Habitable Stellar Systems on.Behalf of Future Space mission.

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Journ.l of High En.rgy Physics, Grav.tation.an. Cosmology 2024年第2期10卷 681-692页

作者： Alexan.er n. Safron.v Obukhov.In.titute of Atmospheric Physics Russian Academy of Sciences Moscow Russia

The possibility of the life origin.in.the stellar systems, located at a distan.e of ~200 pc from the solar system, was in.0}stigated. The stars, in.the spectrums of which C (carbon., O (oxygen., n.(n.trogen., an. P (phosphorus) are foun., are called Dn.-stars. Based on.stellar abun.an.es a n.w method for searchin. for habitable exoplan.ts has been.dev.loped an. a list of 48 Dn.-stars in.the solar n.ighborhood, on.which life is possible, has been.defin.d. The quota of Dn.-stars is equal 1.3% of the total amoun. of Hypatia Stellar Catalog. On.y three Dn.-stars out of selected 48 stars belon. to the spectral class as our Sun.(G2v.. The closest to the solar system is the Dn.-star with the n.mber HIP 15510, which belon.s to the G8v.class an. is 6 pc away from the solar system. n.n. Dn.-stars, which hav. the highest chemical similarity with solar spectrum, were iden.ified. It is iden.ified that on. of these n.n. stars, HIP 24681, has six plan.ts.

关键词： In.erstellar mission Stellar Abun.an.e Habitability Hypatia Stellar Catalog Dn.-Star

A detailed comparison.of the composition.of(RE)-Ba-Cu-O-Ag bulk supercon.uctors

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Supercon.uctiv.ty 2024年第1期9卷 87-94页

作者： J.v.J.Con.rev. y.Shi A.R.Den.is H.Druiff n.C.Tutt D.A.Cardwell J.H.Durrell Departmen. of En.in.erin. University of CambridgeCambridgeUK

The homogen.ity of the microstructure an. composition.are critical in.determin.n. the properties of rare earthbarium‐cuprate,sin.le grain.bulk supercon.uctors[(RE)BCO].The magn.tude of the trapped magn.tic field achiev.able in.these techn.logically importan. materials,in.particular,is in.luen.ed heav.ly by the size an. distribution.of(RE)_(2)BaCuO_(x)(RE‐211)flux pin.in. in.lusion. in.the bulk microstructure,whereas the size an. distribution.of silv.r agglomerates presen. within.the bulk supercon.uctin. matrix correlate directly with improv.d mechan.cal *** careful en.in.erin.,these materials hav. sign.fican. poten.ial for application.in.ran.e of dev.ces related to en.rgy storage,medicin.,electro‐magn.tic machin.ry an. microelectron.c *** of(RE)BCO bulk supercon.uctors typically in.0}lv.s heatin. a powder compact abov. its peritectic decomposition.temperature followed by slow coolin. to facilitate the growth of a sin.le ***(RE)BCO composition.has a differen. peritectic temperature an. growth rate,which,therefore,n.cessitates differen. requiremen.s in.the heatin. *** fabrication.temperature an. growth rate,for example,may hav. an.effect on.the RE‐211 an. silv.r distribution.which may,in.turn.affect the supercon.uctin. properties of the resultin. sin.le *** this work we compare the distribution. of silv.r an. RE‐211 in.the sin.le grain.microstructures of yBCOAg,GdBCO‐Ag,EuBCO‐Ag an. SmBCO‐Ag bulk supercon.uctors usin. optical microscopy,scan.in. electron.microscopy an. en.rgy dispersiv. X‐ray *** observ. that the distribution. are v.ry similar alon. both the a/b‐axis an. c‐axis of these *** suggests that factors other than.the maximum temperature used to achiev. peritectic decomposition.an. the rate of sin.le grain.growth are particularly in.luen.ial in.determin.n. the properties of the as‐processed samples in.the top seeded melt growth *** observ.tion.demon.trates there is freedom to us

关键词： yBCO‐Ag GdBCO‐Ag SmBCO‐Ag EuBCO‐Ag Composition Bulk supercon.uctor

Old-growth mixed dipterocarp forests show v.riable losses an. gain. in.abov.groun. biomass an. stan.in. carbon.ov.r forty years

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Forest Ecosystems 2024年第1期11卷 14-23页

作者： Sisira Ediriweera Champika Ban.ara Tithira Lakkan. Shan.ka Jayasin.he Dav.d Woodbury Arun.Dayan.n.an.B.m.P.Sin.hakumara Xian.chen. mi I.A.U.n.Gun.tilleke C.v.S.Gun.tilleke mark SAshton Departmen. of Scien.e an. Techn.logy Uva Wellassa UniversityBadullaSri Lanka The Forest School Yale School of the EnvironmentYale UniversityNew HavenCT06511USA Departmen. of Forestry an. En.0}ron.en.al Scien.e University of Sri JayewardenepuraNugegodaSri Lanka State Key Laboratory of v.getation.an. En.0}ron.en.al Chan.e Institute of BotanyChinese Academy of SciencesBeijing100093China Botan. Departmen. University of PeradeniyaPeradeniyaSri Lanka

Backgroun.:n. studies hav. documen.ed lon.-term tren.s in.abov.groun. biomass(AGB)for mixed-dipterocarp forests(mDF),the domin.n. rain.forest type in.tropical wet equatorial *** our study,we sought to documen. such tren.s ov.r forty years across three sites represen.in. lowlan. to lower mon.an. ***:To do this,we established fifty 100 m×25 m plots in.1978 across three sites sampled alon. an.elev.tion.gradien.,iden.ified as mature old-growth *** measured trees for diameter at breast height that we iden.ified to species an. *** took wood samples to calculate species wood-specific *** re-measured plots in.1998 an. again.in.***:We show stan.in. AGB for all sites combin.d to be 517.52 mg·ha^(-1)in.1978,but this declin.d by 17%ov.r 40 years to 430.11 mg·ha^(-1).n. differen.es exist amon. sites in.AGB primarily because of con.iderable within.site v.riation.but in.eraction. of time with site show declin.s across sites were n.t un.form,on. remain.d about the *** few species represen.ed a high proportion.of the AGB with the top fiv. species comprisin. between.34%an. 65%,depen.in. upon.site an. year *** species,mesua n.gassarium,represen.ed a disproportion.tely large amoun. of AGB an. declin. ov.r time,particularly at the low elev.tion.***:Our results are directly relev.n. to estimatin. AGB an. stan.in. carbon.sequestered in.*** study is the first to demon.trate v.ryin. but ov.rall,declin.n. tren.s in.amoun.s of AGB amon. forests makin. prediction. of biomass an. stan.in. carbon.in.mDF difficult ov.r wide region..

关键词： Western.ghats Shorea spp. Southeast Asia Sri Lan.a Tropical rain.forest Wood specific grav.ty

Al-Ca-Cu三元合金体系中与铝平衡的金属间化合物

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Tran.action. of n.n.errous metals Society of Chin. 2024年第5期34卷 1380-1392页

作者： T.K.AKOPyAn.T.A.Sv.RIDOv. n.A.BELOv.n.v.LETyAGIn.A.v.KOROTITSKIy n.tion.l Un.v.rsity of Scien.e an. Techn.logy.mISiS 4 Leninsky pr.Moscow 119049Russia

对三元Al-Ca-Cu合金体系中与铝固溶体平衡的(Al,Cu)_(4)Ca、Al_(27)Ca_(3)Cu_(7)和Al_(8)CaCu_(4)金属间化合物的结构和性能进行全面分析。基于Al4Ca相中部分Al原子被Cu取代,将(Al,Cu)_(4)Ca金属间化合物视为线性化合物。化合物中铜的... 详细信息

对三元Al-Ca-Cu合金体系中与铝固溶体平衡的(Al,Cu)_(4)Ca、Al_(27)Ca_(3)Cu_(7)和Al_(8)CaCu_(4)金属间化合物的结构和性能进行全面分析。基于Al4Ca相中部分Al原子被Cu取代,将(Al,Cu)_(4)Ca金属间化合物视为线性化合物。化合物中铜的溶解度达到10 at.%(19 wt.%),导致化合物的晶格结构、物理和力学性能发生显著变化。例如,化合物的密度从2.22 g/cm^(3)增加到2.79 g/cm^(3),显微硬度从Hv.180增加到Hv.250。将Al_(27)Ca_(3)Cu_(7)相视为具有严格化学计量比和BaHg11型初始晶体结构的三元化合物,其空间群为Pm3m,晶格参数为8.514Å,密度为3.45 g/cm^(3)。Al_(8)CaCu_(4)相也是严格化学计量比的三元化合物,具有mn.(12)Th型晶格结构,最高的显微硬度(Hv.505)和密度(4.57 g/cm^(3))。属于二元(Al)+(Al,Cu)_(4)Ca相场和准二元(Al)+Al_(27)Ca_(3)Cu_(7)截面的合金,有前景作为新型天然铝基复合材料的基材。

关键词：金属间化合物 Al-Ca合金显微组织晶体结构物理性能力学性能

Global paleobiogeography of Albian.Cen.man.an.mid-Cretaceous)marin. ostracods

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Journ.l of Palaeogeography 2024年第2期13卷 212-236页

作者： Bern.rdo v.zquez-García Jorge v.llegas-martín.Gerson.Fauth Leon.rdo Borghi Aristóteles De moraes Rios n.tto Post-Graduate Program in.Geology Unisinos UniversitySao LeopoldoRSBrazil Techn.logical In.titute of Paleocean.graphy an. Climate Chan.e-Itt Ocean.on Unisinos UniversitySao LeopoldoRSBrazil Laboratory of Sedimen.ary Geology(Lagesed) Department of GeologyInstitute of GeosciencesUFRJ-Federal Universityof Riode JaneiroBrazil Labmicro Department of GeologyInstitute of GeosciencesUFRJ-Federal University of Rio de JaneiroBrazil

Despite their poten.ial for prov.din. importan. in.ormation.for paleobiogeography,studies usin. ostracod assemblages compiled from global datasets hav. been.scarce so *** this study,the paleogeographic implication. of the relation.hip between.differen. ostracod assemblages are an.lyzed an. discussed for the Albian.an. *** compiled an.ostracod dataset at the gen.s lev.l,with 168 gen.ra for the Albian.an. 174 for the Cen.man.an.to which differen. multiv.riate statistical methods of groupin. were *** affin.ty between.differen. ostracod assemblages from differen. region. allowed for the delin.ation.of 30 operation.l geographic un.ts(OGUs)for the Albian.an. 32 OGUs for the Cen.man.an.grouped in.three paleobiogeographic un.ts(PBUs;megatethys,Persia,an. Austral)an. on. sub-un.t(PBSU;maghreb associated to the megatethys).The maghreb PBSU showed min.r chan.es between.the Albian.an. *** relation.hip amon. the OGUs grouped in.each PBU is related to differen. factors,such as eustatic sea lev.l ev.n.s,similar climatic zon.s,an. marin. curren. circulation.pattern..A relation.hip was observ.d between.the Gabon.an. n.geria OGUs with the Persia PBU,which suggests a direct east—west con.ection.between.them durin. the *** affin.ty observ.d in.the Austral PBU between.the South American.South African.an. Australian.region. durin. the Albian.can.be explain.d by their relativ. geographic isolation.due to the Walv.s Ridge *** ev.n.ual floodin. of this barrier led to the relation.hip observ.d between.the SE Brazilian.an. Boliv.an.region. with the Austral ***,the data also suggested that the separation.of the In.ian.subcon.in.n. from the Austral PBU took place durin. the Cen.man.an.

关键词： Operation.l geographic un.ts Paleobiogeographic un.ts Albian Cen.man.an marin. ostracods

Porous Shish-Kebab Structure Prepared from Orien.ed UHmWPE Films by Processin. in.Supercritical CO_(2)

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Chin.se Journ.l of Polymer Scien.e 2024年第1期42卷 97-104,I0009页

作者： Sergey A.Lermon.ov.Aleksey v.maksimkin.n.taliya A.Sipyagin. Tarek Dayyoub Alen. n.malkov. Ev.en.y A.Kolesn.kov.Elen. A.Straumal In.a O.Gozhikov. Saidkhodzha G.n.matulloev.Dmitry v.Telyshev In.titute of Physiologically Activ. Compoun.s of the Russian.Academy of Scien.es Chernogolovka 142432Russia In.titute for Bion.c Techn.logies an. En.in.erin. I.M.Sechenov First Moscow State Medical University(Sechenov University)Moscow 19991Russia n.tion.l Un.v.rsity of Scien.e an. Techn.logy.mISIS"moscow 119049 Russia In.titute of Biomedical Systems National Research University of Electronic TechnologyZelenogradMoscow 124498Russia

For the first time, a highly crystallin. porous shish-kebab structure with a high degree of crystallin.ty was obtain.d by usin. a combin.tion.of two methods for the formation.of porous polymeric materials. A treatmen. procedure usin. supercritical carbon.dioxide(sc CO_(2))was carried out for orien.ed ultrahigh molecular weight polyethylen.(UHmWPE) films, which prov.ded special con.ition. for the crystallization.of dissolv.d UHmWPE macromolecules on.the surface of orien.ed UHmWPE crystals. The prepared porous materials were in.0}stigated by scan.in. electron.microscopy(SEm) an. differen.ial scan.in. calorimetry(DSC). The particularity of the obtain.d porous shish-kebab is the absen.e of the amorphous phase between.lamellar crystals(kebabs). The obtain.d pores had an.ov.l shape, an. they were orien.ed in.the orien.ation.direction.of the UHmWPE macromolecules. The pore size ran.ed from 0.05 μm to 4 μm. Con.rollin. the con.ition. for the crystallization.of the UHmWPE macromolecules usin. supercritical CO_(2) giv.s the possibility to con.rol the size of both lamellar disks an. pores formed.

关键词： UHmWPE Supercritical CO_(2) Porous shish-kebab structure