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Unmixing detrital zircon U-Pb ages reveals tectonic and climatic depositional influences on the Carboniferous Ansilta Formation,Calingasta-Uspallata Basin,Western Argentina

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Geoscience Frontiers 2024年第4期15卷 61-77页

作者： J.R.Malone J.e.Malone J.L.Isbell D.h.Malone J.P.Craddock K.N.Pauls Department of Geological Sciences Jackson School of GeosciencesUniversity of Texas at AustinAustinTX 78712USA Iowa Geological Survey University of IowaIowa CityIA 52240USA Department of Geosciences University of Wisconsin-MilwaukeeMilwaukeeWI 53211USA Department of Geography Geology and the EnvironmentIllinois State UniversityNormalIL 61790-4400USA

The Late Paleozoic Ice Age(LPIA)was a principal control of sedimentation across Gondwana from the late Devonian through early *** assess the hypothesis that glacial to interglacial transitions in western Argentina were the primary control influencing sediment routing patterns among the various Carboniferous-Permian basins in western *** Carboniferous Ansilta Formation consists of glaciomarine,nearshore,and fluvial systems deposited during the LPIA along the eastern margin of the Calingasta-Uspallata Basin in *** lower,glacially influenced succession of the Ansilta Formation records at least five glacial advances;the upper succession of consists of progradational shallow marine,deltaic,and fluvial *** combine 1225 new U-Pb zircon ages from six samples of the Carboniferous Ansilta Formation in the Calingasta-Uspallata Basin with 5864 U-Pb ages from 147 pub-lished samples in the detrital Pymix forward mixture model to characterize provenance *** the glacially influenced lower Ansilta Formation,sediment was derived locally from the Protoprecordillera,which was a prominent highland with alpine glaciers flowing west and east into the Calingasta-Uspallata and Paganzo basins,***,there was little or no connection between these two basins during Serpukhovian-Bashkirian *** fluvial/deltaic upper Ansilta had distal sediment sources in the Sierras ***,our results support the collapse of the Protoprecordillera topographic barrier,enabling drainage patterns connecting the Paganzo and Calingasta-Uspallata basins by late Pennsylvanian-early Permian time.

关键词： Late Paleozoic Ice Age Argentina Calingasta-Uspallata Basin Ansilta Formation Detrital zircon provenance

2D Ca/Nb-based perovskite oxide with Ta doping as highly efficient h_(2)O_(2)synthesis catalyst

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Nano Research 2024年第6期17卷 4934-4942页

作者： Xingchen Yang Yang Gao Xiaohui Xu Wenqiang Xu Denghui wang Bin Luo Dong Liu Tao Liang Bin wang CAS Key Laboratory of Nanosystem and hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnologythe University of QueenslandSt LuciaQLD 4072Australia State Key Laboratory of Organic–Inorganic Composites College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China State Key Lab of Silicon Materials Zhejiang UniversityHangzhou 310027China

Perovskite oxides(POs)are emerging as a class of highly efficient catalysts for reducing oxygen to h_(2)*** a rich variety of POs-based catalysts have been developed by tuning the complex composition,a highly efficient PO catalyst that is able to alter the reaction pathway from a 4e−process to a 2e−process for h_(2)O_(2)production has rarely been *** modified the structure and composition of a Ca-and Nb-based PO material by realizing a uniform two-dimensional(2D)morphology and varied Ta doping,resulting in the 2D Ca_(2)Nb_(3−x)Ta_(x)O_(10)−(x=0,0.5,1,and 1.5)monolayer *** obtained catalysts exhibit a dominant 2e−pathway and show exceptional h_(2)O_(2)production *** typical Ca_(2)Nb_(2.5)Ta_(0.5)O_(10)−nanoflakes showed an onset potential of 0.735 V *** hydrogen electrode(Rhe),a remarkably high selectivity over 95%across a wide range of 0.3-0.7 V,an impressively high Faradaic efficiency of 94%,and a notable h_(2)O_(2)productivity of 1571 mmol·gcat^(−1)·h^(−1).These findings highlight the great potential of 2D perovskite oxide nanoflakes as advanced electrocatalysts for 2e−oxygen reduction reaction.

关键词： perovskite oxide h_(2)O_(2) two-electron oxygen reduction reaction catalyst Ca_(2)Nb_(3-x)Ta_(x)O_(10)-nanoflakes

Peroxidase-like nanozyme based microenvironment-responsive injectable hydrogel for bacteria-infected wound healing

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Science China Technological Sciences 2024年第10期67卷 3247-3260页

作者： ZhOU Wei LI XiaNan TANG MengCheng PAN LingFeng wang BeiBei ZhANG hao ZhANG han wang ShiBo KONG XiangDong Institute of Smart Biomaterial Materials School of Materials Science and EngineeringZhejiang University of Science & Technology Zhejiang-Mauritius Joint Research Center for Biomaterials and Tissue engineering Zhejiang University of Science & Technology

hydrogel stands out as one of the most attractive wound dressings due to its excellent moisturizing properties and capacity to absorb wound exudates. however, conventional hydrogel dressings often lack responsiveness to the microenvironment, merely acting as protective barriers for the wound. Consequently, they exhibit limited effectiveness in preventing infection and facilitating wound repair. To address these problems, we have developed a multifunctional injectable hydrogel, CF/MS@hG, based on peroxidase-like nanozymes, aiming at rapidly healing bacterial-infected wounds. The hydrogel is mainly composed of oxidized sodium alginate, aminated gelatin, and polylysine, encapsulating MIL-101(CuFe) NPs(CF) and manganese selenide nanoparticles(MnSe2NPs, or MS NPs). After injection, the complex rapidly gelatinizes at the infected wound site through a Schiff base reaction. In vitro experiments have demonstrated the hydrogel's strong adhesion and self-healing ***, CF exhibiting peroxidase(POD)-like activity, catalyzes in situ hydrogen peroxide(h2O2) to generate highly toxic hydroxyl radicals(·Oh) within the wound microenvironment, inducing oxidative damage to bacteria. Meanwhile, MS decomposes into h2Se in the slightly acidic wound microenvironment, disrupting bacterial metabolism and inhibiting *** addition of polylysine further enhances the hydrogel's antibacterial properties. In vivo experiments have shown that the hydrogel exhibits excellent biological safety and significantly promotes wound healing. This multifunctional smart hydrogel holds great promise for the treatment of bacterial-infected wounds.

关键词： peroxidase-like nanozyme manganese selenide injectable hydrogel bacterial infection wound healing

Synergistic silver-mediated and palladium-catalyzed nondirected olefination of aryl C–h bond: quick access to multi-substituted aryl olefins

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Science China Chemistry 2024年第3期67卷 882-889页

作者： Jian Yao Lili Shao Xiaohong huo Xiaoming wang Shanghai Key Laboratory for Molecular engineering of Chiral Drugs Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 20032China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Transition metal-catalyzed olefination of aryl C-h bond is a powerful tool for the synthesis of alkenes. While the Pd-catalyzed oxidative C-h olefination of arenes, also known as Fujiwara-Moritani reaction, has been established as one of the most efficient methods, the substrates are largely limited to terminal olefins with electron-withdrawing group(s). herein, we report a synergistic silver-mediated and palladium-catalyzed non-directed C-h olefination of arenes with vinyl(pseudo)halides, which offers a complementary strategy to the typical Fujiwara-Moritani reaction. The reactions proceeded well for a variety of halogenated arenes, heteroarenes, and olefin substrates, providing an efficient access to various multi-substituted aryl olefins, including trisubstituted/tetrasubstituted olefins and several complex olefins derived from medicines or natural products. Mechanistic studies indicated a bimetallic Pd/Ag cooperation is operative in the catalysis, i.e., the reaction is initiated by aryl C-h bond cleavage via ligation with phosphine/Ag species, followed by transferring of the aryl moiety to a vinyl palladium intermediate,which is in turn formed by oxidative addition of vinyl(pseudo)halide to a Pd complex. This method enables the synthesis of a wide range of challenging multi-substituted vinyl products from simple arenes(directing-group free) in a streamlined and controllable fashion.

关键词： direct C–h olefination multi-substituted aryl alkenes bimetallic Pd/Ag cooperation C–h functionalization

Cisplatin-appended BODIPY for near infraredⅡfluorescent and photoacoustic imaging-guided synergistic phototherapy and chemotherapy of cancer

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Chinese Chemical Letters 2024年第3期35卷 352-357页

作者： Xuejian Xing e Pang Shaojing Zhao Tangna Pan Qiuxia Tan Benhua wang Xiangzhi Song Minhuan Lan Key Laboratory of hunan Province for Water environment and Agriculture Product Safety College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China

Combining phototherapy and chemotherapy has been considered a promising modality for cancer therapy due to their synergistic ***,we developed three D-π-A-structured boron dipyrromethenes(BODIPYs)(named as B-B,B-C,and B-C-Pt).Due to their enlargedπ-conjugated structure and high intramolecular charge transfer effect,the synthesized BODIPYs had photothermal conversion capability,and their absorption and fluorescence spectra were *** cisplatin-appended BODIPY(B-C-Pt)exhibited good singlet oxygen(^1O_(2))generation ability and near infrared(NIR)absorption and fluorescence(λ_(Abs)=748 nm,λ_(em)=947 nm).After being encapsulated by distearoyl phosphoethanolamine polyethyleneglycol 2000(DSPe-PeG-2000),which could inhibit the h-aggregation of B-C-Pt,the absorption and fluorescence of the obtained B-C-Pt nanoparticles(NPs)were red-shifted to 762 and 985 nm,***^1O_(2)quantum yield and photothermal conversion efficiency of the B-C-Pt NPs were 4.0%and 40.6%,***,B-C-Pt NPs had chemotherapeutic efficacy due to the presence of *** vitro and in vivo studies further demonstrated that B-C-Pt NPs had synergistic therapeutic ***,B-C-Pt NPs could be employed in NIRⅡfluorescent and photoacoustic imaging-guided synergistic phototherapy and chemotherapy for cancer treatment.

关键词： Phototherapy Chemotherapy Cisplatin Bodipy NIRⅡfluorescent imaging

Small amount but big impact:Trace oxygen interstitially inserted PtCu alloys by microalloying for efficient oxygen reduction catalysis

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Nano Research 2024年第8期17卷 7001-7012页

作者： Qiheng wang Zhiguo Chen Jingyan Zhang Jingjun Liu Beijing Key Laboratory of electrochemical Process and Technology for Materials Beijing 100029China Beijing University of Chemical Technology Beijing 100029China

The introduction of small size non-metal elements(e.g.,oxygen)into solid solution alloys may be a promising strategy for fabricating efficient Pt-based catalysts with high activity and stability toward oxygen reduction reaction(ORR).herein,oxygen interstitially inserted PtCu(O-PtCu)alloys are firstly designed by an oxygen-microalloying strategy,through ultraviolet(UV)irradiation-assisted galvanic replacement in an aqueous solution containing h_(2)PtCl_(6) and Cu_(2)O nanowires as sacrificial *** obtained O-PtCu alloys feature a typical face-centered cubic(FCC)structure with majority Pt,Cu atoms as building bricks and trace interstitial oxygen(1.65 wt.%)existed in the octahedral sites surrounding Cu atoms,leading to a short-range disordered *** alloy reaches a recorded half-wave potential of 0.96 V(*** hydrogen electrode(Rhe))and mass activity of 0.48 A·mgPt^(−1),much higher than those of commercial Pt/*** the accelerated degradation test(ADT),the mass activity lost only 4.2%after 10k cycles,while the commercial Pt/C lost 66.7%under the same *** with pure Pt and undoped PtCu alloy,the remarkably improved performance can be attributed to the lattice distortion and energy band reconstruction caused by the interstitial oxygen atoms in form of Cu–O ***,the stable Cu–O bonds delay the possible place exchange between surface Pt atoms and surface-adsorbed oxygen species,thereby hindering Pt dissolution,providing a new paradigm to address Pt degradation ***,the introduction of interstitial oxygen into Pt-based alloys may be a facile and smart strategy for the development of advanced Pt-based alloys electrocatalysts.

关键词： oxygen-microalloying platinum alloys octahedral interstices oxygen reduction reaction

Amino acids modified nanoscale zero-valent iron:Density functional theory calculations,experimental synthesis and application in the Fenton-like degradation of organic solvents

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Journal of environmental Sciences 2024年第1期135卷 296-309页

作者： Xingchen Yang Fucheng Ming Jianlong wang Lejin Xu Department of Nuclear engineering and Technology School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China China-eU Institute for Clean and Renewable energy Huazhong University of Science and TechnologyWuhan 430074China Institute of Nuclear and New energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China Beijing Key Laboratory of Radioactive Wastes Treatment Tsinghua UniversityBeijing 100084China

To improve the adsorption and catalytic performance of heterogeneous Fenton-like catalysts for oil wastes,amino acids were used to modify nanoscale zero-valent iron(AA@Fe^(0)),which were applied in the Fenton-like degradation of organic solvents(tributyl phosphate and n-dodecane,named TBP and DD).Twelve amino acids,i.e.,glycine(Gly),alanine(Ala),leucine(Leu),proline(Pro),phenylalanine(Phe),methionine(Met),cysteine(Cys),asparagine(Asn),serine(Ser),glutamic acid(Glu),lysine(Lys)and arginine(Arg),were selected and calculated by density functional theory(DFT).The optimized structure,charge distribution,the highest occupied molecular orbital(hOMO),the lowest unoccupied molecular orbital(LUMO),interaction region indicator(IRI)isosurface map and adsorption energy of AA@Fe^(0),AA@Fe^(0)-TBP and AA@Fe^(0)-DD were studied,which indicated that Fe is more likely to approach and charge transfer with-COO and-Nh_(3) on theα-carbon of amino *** is strong attraction between Fe and–COO,and Van der Waals force between Fe and-Nh_(3),*** the interaction of AA@Fe^(0)with TBP and DD,Van der Waal force plays an important ***@Fe^(0)was synthesized in laboratory and characterized to investigate physicochemical *** Fenton-like degradation of organic solvents,the change of COD in water phase during the degradation process as well as the volume of the organic phase after the reaction were *** results of calculations combined with experiments showed that Ser-modified Fe^(0)performed the best in these amino acids,with 98%removal of organic solvents.A possible catalytic mechanism was proposed in which amino acids acted a linking role between Fe and organic solvents,activating h_(2)O_(2)to generate hydroxyl radicals for the degradation of organic solvents.

关键词： Amino acids Nanoscale zero-valent iron Density functional theory Organic solvents Fenton-like degradation

Unique genes carried by abundant species enhance Ch_(4) emissions during the growing season at the Tibetan Plateau

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Soil ecology Letters 2024年第2期6卷 83-95页

作者： Yue Liang Liyuan he Jieying wang Yanfang Liu Wenying wang Chengjie Ren Jun wang Yaoxin Guo Ninglian wang Fazhu Zhao Shaanxi Key Laboratory of earth Surface System and environmental Carrying Capacity Northwest UniversityXi’an710127China College of Urban and environmental Sciences Northwest UniversityXi’an710127China Department of Biology San Diego State UniversitySan DiegoCA92182USA Key Laboratory of Biodiversity Formation Mechanism and Comprehensive Utilization in Qinghai-Tibet Plateau School of Life SciencesQinghai Normal UniversityXining810008China College of Agronomy Northwest A&F UniversityYangling712100China The College of Life Sciences Northwest UniversityXi’an710072China Carbon Neutrality College (Yulin) Northwest UniversityXi’an710127China

Ch_(4) emission rates followed an increased pattern during the growing season at Tibetan Plateau.•Unique genes carried by abundant species were positively correlated with Ch_(4) emission rates.•Climate factors influenced Ch_(4) emission rates by regulating microbial community and their *** play pivotal roles in soil methane(Ch_(4))emissions and their functional genes are origins of a key mechanism for soil ***,understanding of the roles of specific genes(e.g.,unique or shared genes carried by species)underlying Ch_(4)-cycling remains ***,we measured Ch_(4) emission rates and investigated variations in microbial community and the abundance of genes carried by species during the growing season in alpine meadow on the Tibetan *** discovered that Ch_(4) emission rates increased from 394.4,745.9,and 1092.7µg Ch4 m−2 h−1,in April,June,and August,respectively,and had a positive correlation with unique genes carried by abundant species during the growing ***,we found that unique genes carried by abundant species involved in methanogenesis processes have a higher abundance than methanotrophic *** analysis indicated that climate factors(i.e.,mean monthly temperature(MMT)and mean monthly precipitation(MMP))influenced microbial community and their functional genes,and therefore affected the Ch_(4) emission ***,the present study provides a novel insight into the variation of soil Ch4 emissions from a functional gene perspective,highlighting the important roles of unique genes carried by abundant species in Ch4 emissions in the Tibetan Plateau under seasonal variation.

关键词： soil Ch_(4) emissions unique genes abundant species Ch_(4)-cycling growing season

Mechanisms underlying the role of endoplasmic reticulum stress in the placental injury and fetal growth restriction in an ovine gestation model

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Journal of Animal Science and Biotechnology 2024年第1期15卷 201-217页

作者： hao Zhang Xia Zha Yi Zheng Xiaoyun Liu Mabrouk elsabagh hongrong wang honghua Jiang Mengzhi wang Laboratory of Metabolic Manipulation of herbivorous Animal Nutrition College of Animal Science and TechnologyYangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture and Agri‑Product Safety Ministry of Education of ChinaYangzhou UniversityYangzhou 225009P.R.China Department of Animal Production and Technology Faculty of Agricultural Sciences and TechnologiesNiğde Omer Halisdemir UniversityNigde 51240Turkey Department of Nutrition and Clinical Nutrition Faculty of Veterinary MedicineKafrelsheikh UniversityKafrelSheikhEgypt Department of Pediatrics Northern Jiangsu People’s HospitalClinical Medical CollegeYangzhou UniversityYangzhou 225001China State Key Laboratory of Sheep Genetic Improvement and healthy Production Xinjiang Academy of Agricultural Reclamation ScienceShihezi 832000China

Background exposure to bisphenol A(BPA),an environmental pollutant known for its endocrine-disrupting properties,during gestation has been reported to increase the risk of fetal growth restriction(FGR)in an ovine model of *** hypothesized that the FGR results from the BPA-induced insufficiency and barrier dysfunction of the placenta,oxidative stress,inflammatory responses,autophagy and endoplasmic reticulum stress(eRS).however,precise mechanisms underlying the BPA-induced placental dysfunction,and subsequently,FGR,as well as the potential involvement of placental eRS in these complications,remain to be *** In vivo experiment,16 twin-pregnant(from d 40 to 130 of gestation)hu ewes were randomly distributed into two groups(8 ewes each).One group served as a control and received corn oil once a day,whereas the other group received BPA(5 mg/kg/d as a subcutaneous injection).In vitro study,ovine trophoblast cells(OTCs)were exposed to 4 treatments,6 replicates *** OTCs were treated with 400μmol/L BPA,400μmol/L BPA+0.5μg/m L tunicamycin(Tm;eRS activator),400μmol/L BPA+1μmol/L 4-phenyl butyric acid(4-PBA;eRS antagonist)and DMeM/F12 complete medium(control),for 24 *** In vivo experiments,pregnant hu ewes receiving the BPA from 40 to 130 days of pregnancy experienced a decrease in placental efficiency,progesterone(P4)level and fetal weight,and an increase in placental estrogen(e2)level,together with barrier dysfunctions,OS,inflammatory responses,autophagy and eRS in type A *** vitro experiment,the OTCs exposed to BPA for 24 h showed an increase in the e2 level and related protein and gene expressions of autophagy,eRS,pro-apoptosis and inflammatory response,and a decrease in the P4 level and the related protein and gene expressions of antioxidant,anti-apoptosis and barrier ***,treating the OTCs with Tm aggravated BPA-induced dysfunction of barrier and endocrine(the increased e2 level and decreased P4 level),OS,inflamm

关键词： Autophagy Bisphenol A endoplasmic reticulum stress Fetal growth restriction Inflammatory responses Sheep