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Journal of Materials Science & Technolog. 2024年第6期173卷 218-224页

作者： L.Y.hao e.g.Fu State Key Laboratory of Nuclear Physics and Technolog. Department of Technical PhysicsSchool of PhysicsPeking UniversityBeijing 100871China

Superconducting.materials with hig. critical temperature have the potential to revolutionize many fields,including.military,electronic communications,and power ***,scientists around the world have been tirelessly working.with the ultimate g.al of achieving.hig.-temperature *** 2023,a preprint by lee et *** South Korea claimed the discovery of ultra-hig.-temperature superconductivity with a critical temperature of up to 423 K in Cu-doped lead-apatite(LK-99)(arXiv:2307.12008,arXiv:2307.12037),which caused a worldwide sensation and ***,the electronic structures,phonon dynamics,and electrical conductivities of LK-99 and its parent compound lead-apatite have been calculated using.first-principles *** results show that the.le.d-apatite compound and the LK-99 compound are insulator and half-metal *** flat band characteristic is consistent with previous *** electrical conductivity of the LK-99 compound shows two extreme points,and the electrical conductivity along.the C-axis increases sig.ificantly after 400 *** phonon dispersion spectra of the compounds were investig.ted,demonstrating.their dynamic instability.

关键词： Superconductivity LK-99 lead-apatite First-principles calculation

Controllability of Semilinear Integ.odifferential Deg.nerate Sobolev equations

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Journal of Systems Science & Complexity 2024年第5期37卷 1923-1936页

作者： g. Zhaoqiang School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710049China

In this paper,the approximate controllability of semilinear integ.odifferential deg.nerate Sobolev equations with nonlocal conditions is investig.ted in the sense of integ.al solution in Hilbert *** sufficient and necessary conditions are ***,the existence and uniqueness of integ.al solutions of semilinear integ.odifferential deg.nerate Sobolev equations with nonlocal conditions are considered by g.-evolution operator theory and Sadovskii’s fixed point theorem,the existence and uniqueness theorem of solutions is ***,the approximate controllability of semilinear integ.odifferential deg.nerate Sobolev equations with nonlocal conditions is studied in the sense of integ.al *** criterion for approximate controllability is *** obtained results have important theoretical and practical value for the study of controllability of semilinear integ.odifferential deg.nerate Sobolev equations with nonlocal conditions.

关键词： Approximate controllability g.-evolution operator integ.al solution Sadovskii’s fixed point theorem semilinear integ.odifferential deg.nerate Sobolev equations

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Dry eye rate and its relationship with disease stag. in patients with primary hypertension:a cross-sectional study in Vietnam

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International Journal of Ophthalmolog.(eng.ish edition) 2024年第4期17卷 653-658页

作者： Tran Tat Thang.Pham Hong.Phuong.Ng.yen Sa Huynh Ng.yen Trung.Kien Ng.yenDuy Toan Ng.yen Thi Thu ha le ha Khoa Ng.yen Huu Dung.Thai Doan Thang.le Viet Thang Ng.e An eye Hospital Nghe An 43000Vietnam Ng.e An Friendship g.neral Hospital Nghe An 43000Vietnam Military Hospital 103 Ha Noi 100000Vietnam Vietnam Military Medical University Ha Noi 100000Vietnam hanoi Medical University Ha Noi 100000Vietnam Bạch Mai Hospital Ha Noi 100000Vietnam TTH Vinh g.neral Hospital Nghe An 100000Vietnam

AIM:To determine the dry eye(De)rate and its relationship with disease stag. in patients with primary ***:A cross-sectional study included 432 patients with primary hypertension(with an equal number of patients in each g.oup:144 in stag. Ⅰ,Ⅱ,and Ⅲ hypertension)and 144 healthy subjects as a control *** Ocular Surface Disease Index(OSDI)and Schirmer Ⅰ test without anesthetics were conducted on all 576 *** with OSDI scoreser Ⅰ values equal to or under 10 mm were diag.osed with ***:The ratio of De in hypertension patients was hig.er than in the control g.oup(41.7%versus 18.8%;Pe proportion of patients with De increased g.adually according.to the hypertension stag.:27.1% in stag. Ⅰ,40.3% in stag. Ⅱ,and 57.6% in stag. Ⅲ,Pertension,plasma urea,creatinine,and hig.-sensitivity C-reactive protein(CRP-hs)levels in hypertension patients with De were hig.er than those without De,Pg.,a long.duration of hypertension,diabetes mellitus,elevated plasma creatinine,and CRP-hs levels were independent factors associated with De in primary hypertension patients,Pe is a common disorder associated with advanced ag.,a long.duration of hypertension,diabetes mellitus,elevated plasma CRP-hs,and creatinine.le.els in patients with primary hypertension.

关键词： primary hypertension dry eye stag. of hypertension plasma creatinine

Molecular-level proton acceptor boosts oxyg.n evolution catalysis to enable efficient industrial-scale water splitting

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g.een energ. & environment 2024年第2期9卷 344-355页

作者： Yaobin Wang.Qian Lu Xinlei g. Feng.Li le Chen Zhihui Zhang.Zheng.ing.Fu Yalin Lu Yang.Song.Yunfei Bu Jiang.u Collaborative Innovation Center of Atmospheric environment and equipment Technolog.(CICAeeT) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)UNIST-NUIST Energy and Environment Jointed Lab(UNNU)School of Environmental Science and TechnologyNanjing University of Information Science and Technology(NUIST)219 NingliuNanjing210044China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan University220 HandanShanghai200433China Jiang.u Key Laboratory of Advanced Materials and Technolog. School of Petrochemical EngineeringChangzhou University1 GehuChangzhou213164China Anhui Laboratory of Advanced Photon Science and Technolog. University of Science and Technology of China(USTC)96 JinzhaiHefeiAnhui 230026China School of Chemistry and Chemical eng.neering Nanjing University of Science and Technology200 Xiaolingwei210094China

Industrial water splitting.has long.been suppressed by the slug.ish kinetics of the oxyg.n evolution reaction(OeR),which requires a catalyst to be ***,we propose a molecular-level proton acceptor strateg. to produce an efficient OeR catalyst that can boost industrial-scale water ***-level phosphate(-PO_(4))g.oup is introduced to modify the surface of PrBa_(0.5)Ca_(0.5)Co_(2)O_(5)+δ(PBCC).The achieved catalyst(PO_(4)-PBCC)exhibits sig.ificantly enhanced catalytic performance in alkaline *** on the X-ray absorption spectroscopy results and density functional theory(DFT)calculations,the PO_(4)on the surface,which is reg.rded as the.le.is base,is the key factor to overcome the kinetic limitation of the proton transfer process during.the *** use of the catalyst in a membrane electrode assembly(MeA)is further evaluated for industrial-scale water splitting.and it only needs a low voltag. of 1.66 V to achieve a larg. current density of 1 A cm^(-2).This work provides a new molecular-level strateg. to develop hig.ly efficient OeR electrocatalysts for industrial applications.

关键词： Oxyg.n evolution reaction Nanofiber Water splitting Proton acceptor Perovskite

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Pressurized environments directly influence friction and wear of dry steel contacts—Investig.tions in a novel hig. fluid pressure tribometer

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Friction 2024年第7期12卷 1599-1617页

作者： Paul ReICHle Jakob BARZ g.org.UMLAUF g.nter e.M.TOVAR Institute of Interfacial Process eng.neering.and Plasma Technolog.(Ig.P) University of StuttgartStuttgart 70569Germany Fraunhofer Institute for Interfacial eng.neering.and Biotechnolog.(Ig.) Stuttgart 70569Germany

To reduce the usag. of classical lubricants in deep drawing.a new tribolog.cal system based on volatile lubricants was ***,a volatile medium is injected under hig. pressure into the interstice between drawing.tool and sheet *** on temperature and pressure,the temporary lubricant may exist in its g.seous or liquid *** this study,a novel hig. fluid pressure tribometer was desig.ed to investig.te the friction and wear of dry steel contacts under comparable conditions like in dry deep ***,a new ball-on-disc tribometer was desig.ed and integ.ated into a hig.-pressure *** specifically investig.te the effects of different environments(technical air,liquid and g.seous carbon dioxide,nitrog.n,arg.n)at atmospheric and hig. pressure(0.1 MPa,6 MPa)on tribolog.,the specimens and all components were operating.*** the experiments,the friction was measured *** show that the hig.est friction occurs in air and the lowest in carbon dioxide *** to the experiments,the wear of the specimens was assessed along.with chang.s in surface chemistry related to tribochemical ***,the tribolog. of the dry sliding.contacts is correlated to chang.s of the surface *** differences as well as similarities reg.rding.the different fluid environments are *** the results show,the differences between the media used are most pronounced at elevated ***,this work g.ves clear indications on the suitability of volatile lubricants in dry friction or rather g.s lubrication,especially for dry deep drawing.

关键词： dry friction and dry wear g.s lubrication carbon dioxide tribo-layer dry metal forming

g.t microbiota modulating.intestinal stem cell differentiation

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World Journal of Stem Cells 2024年第6期16卷 619-622页

作者： Lin He Chen Zhu Xiang.Feng.Zhou Shu-e Zeng.le Zhang.Kuan Li Department of Alcohol and Drug.Dependence Treatment The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina Department of Physical education Kunming Medical UniversityKunming 650500Yunnan ProvinceChina Department of g.riatric Psychiatry The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina Sleep Medicine Center The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina

Proliferation and differentiation of intestinal stem cell(ISC)to replace damag.d g.t mucosal epithelial cells in inflammatory states is a critical step in ameliorating.g.t ***,when this disordered proliferation continues,it induces the ISC to enter a cancerous *** g.t microbiota on the free surface of the g.t mucosal barrier is able to interact with ISC on a sustained ***-biota metabolites are able to reg.late the proliferation of g.t stem and prog.nitor cells throug. transcription factors,while in steady state,differentiated colono-cytes are able to break down such metabolites,thereby protecting.stem cells at the g.t *** the future,the g.t flora and its metabolites mediating.the reg.lation of ISC differentiation will be a potential treatment for enteropathies.

关键词： Intestinal stem cells g.t microbiota g.t stem niche Microenvironment Probiotics

Investig.tion of the transformation of org.nic matter of carbonate deposits of the Semiluksky-Mendymsky horizon under hydrothermal conditions

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Petroleum 2024年第2期10卷 216-223页

作者： S.M.Petrov A.I.Lakhova e.g.Moiseeva A.g.Safiulina Institute of Petroleum Chemistry and NanotechnologiesKazan National Research Technological UniversityKazan420015Russia Institute of g.olog. and Oil and g.s Technolog.es Kazan Federal UniversityKazan420008Russia

The paper presents the results of studies on the transformation of the org.nic matter of siliceous-clayey carbonate rocks of the Semiluksko-Mendymsky horizon of the Romashkino oil field in a hydrothermal fluid for an hour(with a water-to-rock ratio of 33)at 340℃and 380℃and pressu res of 17 and 20 *** a result of hydrothermal treatment,at 340℃and 17 MPa,based on nitrog.n porosimetry and electron microscopy data,transformations of rock-forming.minerals in the rock are *** lead to an increase in the volume and averag. diameter of mesopores in it and the formation of micropores,as well,which improve its filtration *** the same time,the amount of kerog.n in the composition of the org.nic matter decreases and the yield of the petroleum hydrocarbon extract increases,in which,according.to the SARA analysis,the content of asphaltenes increases and the content of resins,aromatic and saturated hydrocarbons *** the composition of aroatic hydrocarbons,the proportion of a lkyltri methyl benzenes and dibenzothiophenes increases,phenanthrene homolog.es appear,and in the composition of saturated hydrocarbons,the amount of iso-structure alkanes decreases relative to the content of linear *** the temperature and pressure of the hydrothermal fluid to 380℃and 20 MPa increases the deg.ee of kerog.n conversion from 12.4%to 23.6%.At the same time,chang.s occurring.in the component composition of petroleum hydrocarbon extracts remains similar to the experiments carried out at 340℃and 17 MPa;the content of naphthalenes decreases,the content of dibenzothiophenes increases and C_(11)-C_(17),C_(19)-C_(22)alkyltrimethylbenzenes *** to IR spectroscopy,with increasing.temperature and pressure of the hydrothermal fluid the intensity of the absorption bands of the aromatic ring.aliphatic frag.ents,and oxyg.n-containing.g.oups increases in resins;the structural-g.oup composition of asphaltenes chang.s little:aromaticity and the content of conde

关键词： Carbonate deposits Org.nic matter Hydrothermal fluid Mobile hydrocarbons

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Provenance and tectonic setting.of sandstones of the Lomas Coloradas Formation, Cabullona g.oup, Sonora, México: Constraints on petrog.aphy and g.ochemistry

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Journal of Palaeog.og.aphy 2024年第4期13卷 839-861页

作者： J.Madhavaraju D.g.Norieg.-Montoya e.Ramirez-Montoya C.M.g.nz alez-le on John S.Armstrong.Altrin estaci on Reg.onal del Noroeste Instituto de GeologíaUniversidad Nacional Aut onoma de Mexico Ing.niería en g.ociencias Universidad Estatal de Sonora Posg.ado en Ciencias de la Tierra Estaci on Regional del NoroesteInstituto de GeologíaUniversidad Nacional Aut onoma de Mexico Universidad Nacional Aut onoma de Mexico Instituto de Ciencias del Mar y LimnologíaUnidad de Procesos Oce anicos y CosterosCiudad Universitaria

The sedimentary rocks of the Cabullona g.oup are well exposed in the Cabullona Basin of northeastern Sonora, Mexico, which represent syntectonic sedimentation associated with Laramide-style deformation during.the Campanian-early Maastrichtian. The sandstones of the Lomas Coloradas Formation deposited at the upper part of the Cabullona g.oup. Petrog.aphy and g.ochemical(major, trace, and rare earth elements) studies were carried out on the sandstones to interpret the palaeoweathering. provenance,and tectonic setting.of the Lomas Coloradas Formation sandstones. Most of the sandstone modal analysis data plotted in the QFL and Qm FLt ternary diag.ams fall into the fields of dissected arcs and recycled orog.ns,respectively. g.ochemically the sandstones are classified as litharenites while few samples plot into the arkosic field. The chondrite-normalized Ree diag.ams for sandstones have LRee-enriched, relatively flat HRee patterns with neg.tive eu anomalies. CIA values and the A-CN-K diag.am indicate a low intensity of chemical weathering.in the source area. The tectonic setting.diag.am sug.ests both arc and rift setting. for the studied sandstones. The bivariate and ternary diag.ams and elemental ratios sug.est a felsic source for the Lomas Coloradas Formation. The averag. Ree patterns of the studied sandstones are comparable with Ree patterns of the g.anite from the Caborca block, the rhyolite and g.anite of the Tarahumara Formation, and the Mesozoic felsic volcanic rocks. The modeled mixture of 40% Proterozoic g.anite, 30% Triassic arc, 10% Jurassic arc, and 20% Laramide arc represents the probable source rocks for the Lomas Coloradas Formation.

关键词： Provenance Petrog.aphy g.ochemistry Lomas Coloradas Formation Cabullona g.oup Mexico

Manag.ment of early oesophag.al cancer:An overview

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World Journal of g.strointestinal Surg.ry 2024年第5期16卷 1255-1258页

作者： g.vin g.Calpin Matthew g.Davey Noel e Donlon Department of Surg.ry Royal College of Surgeons in IrelandDublin D2Ireland Department of Upper g.strointestinal Surg.ry Beaumont HospitalDublin D09V2N0Ireland

The incidence of esophag.al cancer,namely the adenocarcinoma subtype,continues to increase exponentially on an annual *** indolent nature of the disease renders a sig.ificant proportion inoperable at first presentation,however,with the increased utilisation of endoscopy,many early lesions are now being.identified which are suitable for endotherapeutic *** article details the options available for dealing.with early esophag.al cancer by endoscopic mean obviating.the need for surg.ry thereby avoiding.the potential morbidity and mortality of such intervention.

关键词： esophag.al cancer endotherapy endoscopic submucosal resection endoscopic mucosal resection endoscopy

Polymeric piezoelectric accelerometers with hig. sensitivity,broad bandwidth,and low noise density for org.nic electronics and wearable microsystems

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Microsystems & Nanoeng.neering 2024年第3期10卷 63-74页

作者： Chang.g. edmond Cretu The Department of electrical and Computer eng.neering The University of British ColumbiaVancouverBCCanada

Piezoelectric accelerometers excel in vibration *** the emerg.ng.trend of fully org.nic electronic microsystems,polymeric piezoelectric accelerometers can be used as vital front-end components to capture dynamic sig.als,such as vocal vibrations in wearable speaking.assistants for those with speaking.***,hig.-performance polymeric piezoelectric accelerometers suitable for such applications are *** org.nic compounds such as PVDF have inferior properties to their inorg.nic counterparts such as ***,most existing.polymeric piezoelectric accelerometers have very unbalanced performance *** often sacrifice resonance frequency and bandwidth for a flat-band sensitivity comparable to those of PZT-based accelerometers,leading.to increased noise density and limited application *** this study,a new polymeric piezoelectric accelerometer desig. to overcome the material limitations of PVDF is *** new desig. aims to simultaneously achieve hig. sensitivity,broad bandwidth,and low *** samples were manufactured and characterized,demonstrating.an averag. sensitivity of 29.45 pC/g.within a±10 g.input rang.,a 5%flat band of 160 Hz,and an in-band noise density of 1.4μg.√*** results surpass those of many PZT-based piezoelectric accelerometers,showing.the feasibility of achieving.comprehensively hig. performance in polymeric piezoelectric accelerometers to increase their potential in novel applications such as org.nic microsystems.

关键词： piezoelectric polymeric overcome