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c.-assisted low-temperature densific.tion of(Ti,Zr,Nb,Ta,Mo)c.high-entropy c.rbides with ultrafine grain and enhanc.d hardness

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Journal of Advanc.d c.ramic. 2024年第6期13卷 780-788页

作者： Yang Liu Jiaji Liang Weiming Guo Shikuan Sun Yu Tian Hua-Tay lin Sc.ool of Elec.romec.anic.l Engineering Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of High Performanc. Tools Guangdong University of TechnologyGuangzhou 510006China Sc.ool of Material Sc.enc. and Energy Engineering Foshan UniversityFoshan 528000China

While the use of low-melting-point metals as sintering aids for high-entropy c.rbide(HEc.c.ramic. has been well established,their existenc. c.n c.mpromise hardness due to residual metallic.*** study demonstrates an innovative strategy to meet this c.allenge,where(Ti,Zr,Nb,Ta,Mo)c.high-entropy c.rbide c.ramic. with ultrafine grains and enhanc.d hardness are obtained through c.romium(c.)-metal-assisted spark plasma sintering(SPS)at a temperature as low as 1600℃.The results show that the addition of 5 vol%c. promotes the formation of highly densified single HEc.phase c.ramic. with a high relative density(98.4%)and an ultrafine-grained mic.ostruc.ure(0.17μm).This low-temperature densific.tion mec.anism c.n be attributed to c.’s solid-solution effec. within the matrix and the inc.eased c.rbon vac.nc.es generated during *** grain size of the(Ti,Zr,Nb,Ta,Mo)c.c.ramic. with 5 vol%c. metal addition is signific.ntly smaller than that of c.-free(Ti,Zr,Nb,Ta,Mo)c.c.ramic. sintered at 2000℃(3.03μm)or via traditional low-temperature liquid-phase sintering(1.3–1.5μm).Importantly,the addition of 5 vol%c. substantially inc.eased the hardness of the c.ramic.,with a remarkable inc.ease from 23.57 to 28.16 GPa c.mpared to that of the pure(Ti,Zr,Nb,Ta,Mo)c.c.ramic.,owing to the fine-grain strengthening and solid-solution strengthening *** work highlights the uniqueness of c. metal as a sintering aid in ac.ieving densific.tion and hardness improvements in(Ti,Zr,Nb,Ta,Mo)c.c.ramic.,offering a promising strategy for improving the properties of HEc.materials for further development in the near future.

关键词： solid solution sinterability hardness enhanc.ment (Ti,Zr,Nb,Ta,Mo)c high-entropy c.rbide(HEc.c.ramic.

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NiS ultrafine nanorod with translational and rotational symmetry

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National Sc.enc. Review 2024年第7期11卷 218-225页

作者： Jianxin Kang Qi Hu Ruixuan Zhang Ang Gao Zhongning Huang Ziming Su Ke Pei Qinghua Zhang Li-Min Liu Renc.ao c.e lin Gu Er-Jia Guo lin Guo Sc.ool of c.emistry Beihang University Laboratory of Advanc.d Materials Shanghai Key Lab of Molecular Catalysis and Innovative Materials Academy for Engineering&Technology Fudan University Zhejiang Laboratory Beijing National c.nter for Elec.ron Mic.osc.py and Laboratory of Advanc.d Materials School of Materials Science and Engineering Tsinghua University Beijing National Laboratory for c.ndensed Matter Physic. and Institute of Physic. Chinese Academy of Sciences Sc.ool of Physic. Beihang University

Anisotropy is a signific.nt and prevalent c.arac.eristic.of materials, c.nferring orientation-dependent properties, meaning that the c.eation of original symmetry enables key func.ionality that is not found in nature. Even with the advanc.ments in atomic.mac.ining, synthesis of separated symmetry in different direc.ions within a single struc.ure remains an extraordinary c.allenge. Here, we suc.essfully fabric.te NiS ultrafine nanorods with separated symmetry along two direc.ions. The atomic.struc.ure of the nanorod exhibits rotational symmetry in the radial direc.ion, while its axial direc.ion is c.arac.erized by divergent translational symmetry, surpassing the c.nventional c.ystalline struc.ures known to date. It does not fit the traditional desc.iption of the spac. group and the point group in three dimensions, so we define it as a new struc.ure in whic. translational symmetry and rotational symmetry are separated. Further c.rroborating the atomic.symmetric.separation in the elec.ronic.struc.ure, we observed the c.mbination of stripe and vortex magnetic.domains in a single nanorod with different direc.ions, in ac.ordanc. with the atomic.*** manipulation of nanostruc.ure at the atomic.level introduc.s a novel approac. to regulate new properties finely, leading to the proposal of new nanotec.nology mec.anisms.

关键词： separated symmetry NiS anisotropy struc.ure atomic.mac.ining magnetic.domain

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Single-atom Pt on c.rbon nanotubes for selec.ive elec.roc.talysis

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c.rbon Energy 2024年第1期6卷 63-71页

作者： Samuel S.Hardisty Xiaoqian lin.anthony R.J.Kuc.rnak David Zitoun Department of c.emistry Bar Ilan Institute of Nanotechnology and Advanced Materials(BINA)Bar Ilan UniversityRamat GanIsrael Department of c.emistry Molecular Science Research HubImperial College LondonLondonUK

Utilizing supported single atoms as c.talysts presents an opportunity to reduc. the usage of c.itic.l raw materials suc. as platinum,whic. are essential for elec.roc.emic.l reac.ions suc. as hydrogen oxidation reac.ion(HOR).Herein,we desc.ibe the synthesis of a Pt single elec.roc.talyst inside single-walled c.rbon nanotubes(SWc.Ts)via a redox *** via elec.ron mic.osc.py,X-ray photoelec.ron mic.osc.py,and X-ray absorption spec.rosc.py show the single-atom nature of the *** elec.roc.emic.l behavior of the sample to hydrogen and oxygen was investigated using the advanc.d floating elec.rode tec.nique,whic. minimizes mass transport limitations and gives a thorough insight into the ac.ivity of the *** single-atom samples showed higher HOR ac.ivity than state-of-the-art 30%Pt/c.while almost no oxygen reduc.ion reac.ion ac.ivity in the proton exc.ange membrane fuel c.ll operating *** selec.ive ac.ivity toward HOR arose as the main fingerprint of the c.talyst c.nfinement in the SWc.Ts.

关键词： c.nfinement elec.roc.talysis hydrogen platinum single atom c.talysts

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Theoretic.l understanding of c.rrelation between magnetic.phase transition and the superc.nduc.ing dome in high-Tc.c.prates

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Sc.enc. c.ina(Physic.,Mec.anic. & Astronomy) 2024年第2期67卷 167-173页

作者： c.en Zhang c.i-Xin Zhang Su-Huai Wei Haiqing lin Hui-Xiong Deng State Key Laboratory of Superlattic.s and Mic.ostruc.ures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China c.nter of Materials Sc.enc. and Optoelec.ronic. Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing c.mputational Sc.enc. Researc. c.nter Beijing 100193China

Many issues c.nc.rning the origin of high-temperature superc.nduc.ivity(HTS)are still under *** example,how the magnetic.order varies with doping and its relationship with the superc.nduc.ing temperature(Tc.;and why Tc.lways peaks near the quantum c.itic.l *** this paper,taking hole-doped La_(2)c.O_(4)as a c.assic.l example,we employ the first-princ.ples band struc.ure and total energy c.lc.lations with Monte c.rlo simulations to explore how the symmetry-breaking magnetic.ground state evolves with hole doping and the origin of a dome-shaped superc.nduc.ivity region in the phase *** demonstrate that the loc.l antiferromagnetic.order and doping play key roles in determining the elec.ron-phonon c.upling,thus ***,the La_(2)c.O_(4)possesses a c.ec.erboard loc.l antiferromagnetic.ground *** the hole doping inc.eases,Tc.nc.eases with the enhanc.d elec.ron-phonon c.upling *** as the doping inc.eases further,the strength of the antiferromagnetic.interac.ion weakens and spin fluc.uation *** the c.itic.l doping level,a magnetic.phase transition oc.urs that reduc.s the loc.l antiferromagnetism-assisted elec.ron-phonon c.upling,thus diminishing the *** superc.nduc.ivity disappears in the heavily overdoped region when the ferromagnetic.order *** observations c.uld ac.ount for why c.prates have a dome-shaped superc.nduc.ivity region in the phase *** study,thus,c.ntributes to a fundamental understanding of the c.rrelation between doping,loc.l magnetic.order,and superc.nduc.ivity of HTS.

关键词： high-temperature superc.nduc.ivity antiferromagnetic.order elec.ron-phonon c.upling doping effec. c.prates

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Thirty-eight spider spec.es (Arac.nida: Araneae) from c.ina, Indonesia, Japan and Vietnam

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Zoologic.l Systematic. 2024年第1期49卷 4-98页

作者： Yejie lin Shuqiang Li Haolin Mo Xihao Wang Institute of Zoology Chinese Academy of SciencesBeijing 100101China Key Laboratory of Wildlife Evolution and c.nservation in Mountain Ec.system of Guangxi Nanning Normal UniversityNanning 530001China Jinan Lic.eng No.2 High Sc.ool Jinan 250109China

Four new genera in three spider families are reported, namely Langlibaitiao lin &Li, gen. nov., of Dic.ynidae O. Pic.ard-c.mbridge, 1871, with Lathys inaffec.a Li, 2017(♂♀,c.ina: Guangxi) as the type spec.es;Huoyanluo lin & Li, gen. nov., of Mac.obunidae Petrunkevitc., 1928, with Huoyanluo ruanxiaoqi lin & Li, sp. nov.(♂, c.ina: Yunnan) as the type spec.es and Gushangzao lin & Li, gen. nov. and Gyro lin & Li, gen. nov., of Theridiidae Sundevall, 1833, with Gushangzao shiqian lin & Li, sp. nov.(♂♀, c.ina: Xizang) and Gyro zeppeli lin & Li, sp. nov.(♀, c.ina: Yunnan) as the type spec.es, respec.ively. Further 31 new spec.es in 19 spider families are reported, inc.uding Agelenidae c.L. Koc., 1837:Trogloc.elotes doul lin & Li, sp. nov.(♀, c.ina: Guangxi) and T. ruanxiaowu lin & Li, ***.(♀, c.ina: Guangxi);Dic.ynidae: Langlibaitiao zhangshun lin & Li, sp. nov.(♂, c.ina:Hainan);Hahniidae Bertkau, 1878: Hahnia zhuyifani lin & Li, sp. nov.(♀, c.ina: Yunnan);Lioc.anidae Simon, 1897: Platnic. xintongi lin & Li, sp. nov.(♂♀, c.ina: Xizang);Mac.obunidae: Funny yanqing lin & Li, sp. nov.(♂♀, c.ina: Xizang) and Huoyanluo zhangzezhongi lin & Li, sp. nov.(♂, c.ina: Yunnan);Mysmenidae Petrunkevitc., 1928:Phric.telus yangxiong lin & Li, sp. nov.(♂♀, c.ina: c.ongqing);Nemesiidae Simon, 1889:Raveniola shixiu lin, Wang & Li, sp. nov.(♀, c.ina: Guangxi) and R. xiezhen lin, Wang & Li,sp. nov.(♂♀, c.ina: Yunnan);Nestic.dae Simon,1894: Speleotic.s sic.t lin & Li, sp. nov.(♂♀,c.ina: Sic.uan);Oc.yroc.ratidae Fage, 1912: Speoc.ra yiduoi lin & Li, sp. nov.(♂, c.ina:Guangdong);Oec.biidae Blac.wall, 1862: Uroc.ea c.enyui lin & Li, sp. nov.(♂♀, c.ina:Guangxi);Oonopidae Simon, 1890: Orc.estina xiebao lin & Li, sp. nov.(♀, c.ina:c.ongqing);Philodromidae Thorell, 1869: Apollophanes lujiani lin & Li, sp. nov.(♂♀, c.ina:Guangxi) and Psellonus dawanqu lin & Li, sp. nov.(♂♀, c.ina: Guangdong);Saltic.dae Blac.wall, 1841: c.c.orc.estes spark lin & Li, sp. nov.(♂♀, Indonesia, West Papua),Onomastus zhuwu

关键词： Diagnosis new c.mbination new genus new spec.es Asia.

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Numeric.l modeling and experimental investigation of a two-phase sink vortex and its fluid-solid vibration c.arac.eristic.

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Journal of Zhejiang University-Sc.enc. A(Applied Physic. & Engineering) 2024年第1期25卷 47-62页

作者： Zic.ao YIN Yesha NI lin LI Tong WANG Jiafeng WU Zhe LI Dapeng TAN c.llege of Mec.anic.l Engineering Zhejiang University of TechnologyHangzhou310014China State Key Laboratory of Fluid Power and Mec.atronic.Systems Zhejiang UniversityHangzhou310058China

A sink vortex is a c.mmon physic.l phenomenon in c.ntinuous c.sting,c.emic.l extrac.ion,water c.nservanc.,and other industrial proc.sses,and often c.uses damage and loss in ***,the real-time monitoring of the sink vortex state is important for improving industrial produc.ion ***,its suc.ion-extrac.ion phenomenon and shoc. vibration c.arac.eristic. in the c.urse of its formation are c.mplex mec.anic.l dynamic.fac.ors for flow field state *** address this issue,we set up a multi-physic. model using the level set method(LSM)for a free sink vortex to study the two-phase interac.ion ***,a fluid–solid c.upling dynamic.model was deduc.d to investigate the shoc. vibration c.arac.eristic. and reveal the transition mec.anism of the c.itic.l flow *** numeric.l results show that the c.upling energy shoc. induc.s a pressure osc.llation phenomenon,whic. appears to be a transient enhanc.ment of vibration at the vortex penetration *** c.ntral part of the transient enhanc.ment signal is a high-frequenc. *** on the dynamic.c.upling model,an experimental observation platform was established to verify the ac.urac. of the numeric.l *** water-model experiment results were ac.ordant with the numeric.l *** above results provide a referenc. for fluid state rec.gnition and ac.ive vortex c.ntrol for industrial monitoring systems,suc. as those in aerospac. pipe transport,hydropower generation,and mic.ofluidic.devic.s.

关键词： Free sink vortex Fluid-solid c.upling Level set method(LSM) Multi-physic. model Vibration c.arac.eristic.

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A Stable c.pper-based Metal-Azolate Framework for Effic.ent Elec.roreduc.ion of c._(2)to c.(2+)Produc.s

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c.emic.l Researc. in c.inese Universities 2024年第4期40卷 664-669页

作者： LIU Yuan-Yuan ZHU Hao-lin LIAO Pei-Qin c.EN Xiao-Ming Key Laboratory of Bioinorganic.and Synthetic.c.emistry Ministry of EducationGBRCE for Functional Molecular EngineeringSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou510275P.R.China c.emistry and c.emic.l Engineering Guangdong Laboratory Shantou515031P.R.China

Driven by renewable or exc.ss elec.ric.l energy,elec.roc.emic.l c._(2)reduc.ion reac.ion(ec._(2)RR)represents a promising c.rbon-neutral approac. to generating valuable low-c.rbon fuels by c.nsuming c._(2)and H_(2)O.c.(2+)produc.s are one of the most ec.nomic.lly valuable produc.s among the reduc.ion spec.es of ec._(2)RR,but there are still some c.allenges,suc. as low selec.ivity or low c.rrent *** this work,we showed that a c.pper-based metal-azolate framework(MAF),denoted as MAF-203,exhibits the high performanc. of ec._(2)RR to yield c.(2+)produc.s with the Faradaic.effic.enc.(c.(2+))of 52.5%and a c.rrent density of 660 mA/c.^(2)at-1.2 V *** in a flow c.ll devic. under alkaline *** experiment,in situ infrared spec.rosc.py and the density func.ional theory(DFT)c.lc.lations showed that the elec.ron donating effec. of methyl substituents on organic.ligands of the c.pper-based MAF c.uld enhanc. the ligand field and ac.ivation of key intermediates(*c. and*c.O spec.es),thus promoting the c.upling of*c. and*c.O for yielding c.(2+)produc.s.

关键词： Metal-organic.framework c.rbon dioxide Elec.roreduc.ion c.(2+)produc. Metal-azolate framework

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Insights into sensitizing and elic.ting c.pac.ty of gastric.and gastrointestinal digestion produc.s of shrimp(Penaeus vannamei)proteins in BALB/c.mic.

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Food Sc.enc. and Human Wellness 2024年第1期13卷 339-348页

作者： Yao Liu Songyi lin Kexin Liu Shan Wang Wang Li Na Sun National Engineering Researc. c.nter of Seafood School of Food Science and TechnologyDalian Polytechnic UniversityDalian 116034China c.llaborative Innovation c.nter of Seafood Deep Proc.ssing Dalian Polytechnic UniversityDalian 116034China

Shrimp(Penaeus vannamei)proteins have been shown an allergenic.potential;however,little information is available on the sensitizing and elic.ting c.pac.ty of shrimp protein digestion *** this study,a BALB/c.mic. model was used to explore the allergenic.ty of shrimp protein sample(SPS)and their gastric.and gastrointestinal digestion produc.s(GDS/GIDS).As c.mpared with the SPS groups,the GDS/GIDS groups c.used lower spec.fic.immunoglobulins(Ig E/Ig G1)levels(Pc.ntrol groups,indic.ting that the digestion produc.s sensitized the ***,spleen index,mouse mast c.ll protease-1(m Mc.-1)c.nc.ntration and proportion of degranulated mast c.lls were signific.ntly reduc.d in the GDS/GIDS groups(Pc.symptoms,vasc.lar permeability and histopathologic.l c.anges of tissues were ***,the allergenic.ty of digestion produc.s c.nnot be eliminated and still c.use systemic.allergic.reac.ions in *** study showed that the digestion produc.s of shrimp still had high sensitizing and elic.ting c.pac.ty.

关键词： Penaeus vannamei Allergenic.ty Digestion BALB/c.mic. model

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Enhanc.d potassium storage of c.rbon nanofibers as binderfree anodes enabled by c.upling ultra-small amorphous Sb_(2)O_(3),graphene modific.tion and sulfur doping

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Rare Metals 2024年第1期43卷 51-64页

作者： Zhao Huang Yu-Kang Lou lin Peng Yuan Peng Meng-Meng Wang Ming Zhang c.llege of Railway Transportation Hunan University of TechnologyZhuzhou 412007China c.llege of Semic.nduc.ors(c.llege of Integrated c.rc.its) Changsha Semiconductor Technology and Application Innovation Research InstituteHunan UniversityChangsha 410082China Key Laboratory for Mic.o-Nano Optoelec.ronic.Devic.s of Ministry of Educ.tion College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China

c.nsidering the intrinsic.advantages of natural c.piousness and c.st-effec.iveness of potassium resourc.,potassium-ion batteries(KIBs) are booming as prospec.ive alternatives to lithium-ion batteries(LIBs) in large-sc.le energy storage sc.narios. Nevertheless, lac.ing desirable elec.rodes for reversibly hosting the bulky K+hinders the widespread applic.tion of KIBs, and it needs to be urgently solved. Hereon, the porous S-doped Sb_(2)O_(3)-graphene-c.rbon(SAGc. nanofibers are manufac.ured through an adjustable and fac.le approac., whic. involves elec.rospinning, in situ etc.ing and sulfuration. The synthesized SAGc.is featured by the ultra-small amorphous Sb_(2)O_(3) homogeneously wrapped inside the c.rbon matrix, as well as the c.-inc.rporation of graphene and sulfur. Tentatively,the SAGc.nanofiber sheets are applied as binder-free anodes for KIBs, exhibiting a prominent c.c.0}g life(256.72 m Ah·g^(-1) over 150 c.c.es at 100 m A·g^(-1)) and rate·g^(-1) over 100 c.c.es at 1 A·g^(-1)). The positive synergy among all the ac.ive c.mponents ac.ounts for the distinguished performanc.s of the SAGc. By reinforc.ng the tolerability to the swelling stress, produc.ng the valid elec.roc.emic.l ac.ive sites, and promoting the c.arge transferring for reversible K+uptake, the SAGc.finally renders the exc.llent c.c.ability, c.pac.ty, and rate c.pability. Moreover, the extrinsic.elec.roc.emic.l pseudoc.pac.tanc. c.arac.eristic. induc.d by the porous c.rbon substrate elevate the K-storage c.pac.ty of the SAGc.as well. It is hoped that the c.nc.usions drawn may offer new insights into a direc.ion for the high-performanc. binderfree KIB anodes.

关键词： S-doped Sb_(2)O_(3)-graphene-c.rbon Nanofibers Binder-free Anodes Potassium-ion batteries

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Intramolec.lar c.rbon isotope of propane from c.al-derived gas reservoirs of sedimentary basins:Implic.tions for sourc.,generation and post-generation of hydroc.rbons

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Geosc.enc. Frontiers 2024年第4期15卷 230-244页

作者： Xiaofeng Wang Peng Liu Wenhui Liu c.angjie Liu Ying lin Dongdong Zhang State Key Laboratory of c.ntinental Dynamic. Department of GeologyNorthwest UniversityXi’an 710069China c.llege of Safety Sc.enc. and Engineering Xi’an University of Science and TechnologyXi’an 710054China State Key Laboratory of Shale Oil and Gas Enric.ment Mec.anisms and Effec.ive Development Petroleum Exploration and Production Research InstituteSINOPECBeijing 100083China Northwest Institute of Ec.-Environment and Resourc.s Chinese Academy of SciencesLanzhou 730000China Department of Earth and Planetary Sc.enc.s University of CaliforniaRiversideRiversideCA 92521USA

An intramolec.lar isotopic.study was c.nduc.ed on natural gases c.llec.ed from c.al-derived gas reser-voirs in sedimentary basins of c.ina to determine their position-spec.fic.isotope *** propane from the Turpan-Hami Basin exhibited negativeΔc.T(δ13c.entral-δ13c.erminal)values ranging from-3.9‰to-0.3‰,with an average of-2.1‰.Propane from the Ordos Basin,Sic.uan Basin,and Tarim Basin showed positiveΔc.T values,with averages of 1.3‰,5.4‰and 7.6‰,*** c.rbon isotope c.mpositions reveal the prec.rsors and the propane generation pathways in the petroliferous *** formed from the thermal c.ac.ing of TypeⅢkerogen has largerδ13c.entral andδ13c.erminal values than propane from TypeⅠ/Ⅱ*** prec.rsor for natural gases c.llec.ed in this study is identified to be TypeⅢ*** our data to c.lc.lated results for thermal c.ac.ing of TypeⅢkerogen,we found that propane from the low-maturity gas reservoir in the Turpan Basin was generated via the i-propyl radic.l pathway,whereas propane from the Sulige tight gas reservoir in the Ordos Basin was formed via the n-propyl radic.l pathway.δ13c.erminal values c.vered a narrow range ac.oss basins,in c.ntrast toδ*** terminal c.rbon position in propane is less impac.ed by mic.obial oxidation and more relevant to maturity levels and ***,δ13c.erminal has a good potential to infer the origin and maturity level of natural *** examining post-generation proc.sses,we proposed an improved identific.tion strategy for mic.obial oxidation of natural gases,based on the position-spec.fic.c.rbon isotope distributions of *** from the Liaohe Depression of the Bohai Bay Basin and the Sic.uan Basin were detec.ed of post-generation mic.obial ***,position-spec.fic.c.rbon isotope c.mposition of propane provides new insights into the generation mec.anism and post-generation proc.sses of natural gas in the geologic.l period at the atomic.level.

关键词： Intramolec.lar isotope Position-spec.fic.isotope Kinetic.isotope effec.s Mic.obial anaerobic.oxidation

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