检索结果-南通市图书馆

Environmental Issues of a Marine Protected Area in a Tectonic Estuary in the Tropical Eastern Pacific:Uramba(Malaga Bay Colombia):Context,Biodiversity,Threats and Challenges

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2013年第11期5卷 1037-1047页

作者： Jaime Ricardo Cantera Kintz Edgardo Londono-Cruz Luz Marina Mejia-Ladino leonardo herrera-orozco Carlos Andres Satizabal Natalia Uribe-Castaneda Research Group in Estuaries and Mangroves of Colombian Pacific Departamento de BiologiaUniversidad del ValleCaliColombia Research Group in Taxonomy Systematic and Marine EcologyInstituto de Investigaciones Marinas y Costeras“Jose Benito Vives de Andreis”Santa MartaColombia

The environmental protection of tropical marine and coastal areas faces different challenges due to the diversity of aspects related to these areas, which include natural, social and economical issues. Despite these challenges, efforts for the protection of these areas are urgent nowadays because of the dramatical increase of human related threats like habitat destruction and population growth. Malaga Bay (MB) is a tectonic estuarine system located in Panama Bight (central region of the Colombian Pacific coast), which due to its origin shows important environmental characteristics of few sites in the Tropical Eastern Pacific (TEP) match. For these reasons, the government of Colombia declared in 2010, the bay’s marine area as a Marine National Natural Park in order to preserve its unique estuarine marine biodiversity. Despite this measure, MB presents several conditions that make environmental protection a very difficult task. In this paper, we present the geographical context, biodiversity and natural resources, environmental threats, the complexity of economic and social context, and the institutional and legal context of MB, to exemplify the difficulty that the protection of marine areas face in the TEP.

关键词： Protected Marine Areas Resources Conservation Estuaries Tropical Eastern Pacific

Is tuberous sclerosis complex-associated autism a preventable andtreatabledisorder?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Pediatrics 2024年第1期20卷 40-53页

作者： Paolo Curatolo Mirte Scheper leonardo Emberti Gialloreti Nicola Specchio Eleonora Aronica Child Neurology and Psychiatry Unit Systems Medicine DepartmentTor Vergata UniversityRomeItaly Department of Neuropathology Amsterdam NeuroscienceAmsterdam UMC Location University of AmsterdamAmsterdamTheNetherlands Department of Biomedicine and Prevention University of Rome Tor VergataVia Montpellier 100133 RomeItaly Clinical and Experimental Neurology Bambino Gesù Children's HospitalIRCCSFull Member of European ReferenceNetworkEpiCAREPiazza S.Onofrio400165 RomeItaly Stichting Epilepsie Instellingen Nederland(SEIN) HeemstedeAmsterdamThe Netherlands

Background Tuberous sclerosis complex(TSC)is a genetic disorder caused by inactivating mutations in the TSCl and TSC2 genes,causing overactivation of the mechanistic(previously referred to as mammalian)target of rapamycin(mTOR)signaling pathway in fetal *** mTOR pathway plays a crucial role in several brain processes leading to TSC-related epilepsy,intellectual disability,and autism spectrum disorder(ASD).Pre-natal or early post-natal diagnosis of TSC is now possible in a growing number of pre-symptomatic *** sources We searched PubMed for peer-reviewed publications published between January 2010 and April 2023 with the terms“tuberous sclerosis",“autism",or“autism spectrum disorder""animal models",“preclinical studies",“neurobiology",and“treatment".Results Prospective studies have highlighted that developmental trajectories in TSC infants who were later diagnosed with ASD already show motor,visual and social communication skills in the first year of life *** genetic,cellular,electroencephalography and magnetic resonance imaging biomarkers can identify pre-symptomatic TSC infants at high risk for having autism and *** Preventing epilepsy or improving therapy for seizures associated with prompt and tailored treatment strategies for autism in a sensitive developmental time window could have the potential to mitigate autistic symptoms in infants with TSC.

关键词： Animal model-Autism spectrum disorders Developmental and epileptic encephalopathy Mechanisms mTOR Risk Tuberos sclerosis complex

Unravelling the ion transport and the interphase properties of a mixed olivine cathode for Na-ion battery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第9期96卷 300-317页

作者： Luca Minnetti leonardo Sbrascini Antunes Staffolani Vittorio Marangon Francesco Nobili Jusef Hassoun School of Sciences and Technologies–Chemistry Division University of CamerinoVia Madonna delle Carceri ChIP62032 CamerinoItaly Current affiliation:University of Bologna Department of Chemistry“Giacomo Ciamician”Via Francesco Selmi 240126 BolognaItaly Graphene Labs Istituto Italiano di Tecnologiavia Morego 30Genoa 16163Italy Department of Chemical Pharmaceutical and Agricultural SciencesUniversity of FerraraVia Fossato di Mortara 1744121 FerraraItaly GISEL−Centro di Riferimento Nazionale per i Sistemi di Accumulo Elettrochimico di Energia INSTMFirenze 50121Italy National Interuniversity Consortium of Materials Science and Technology(INSTM)University of Ferrara Research Unit University of FerraraVia Fossato di Mortara1744121 FerraraItaly

The replacement of Li by Na in an analogue battery to the commercial Li-ion one appears a sustainable strategy to overcome the several concerns triggered by the increased demand for the electrochemical energy ***,the apparently simple change of the alkali metal represents a challenging step which requires notable and dedicated ***,we investigate herein the features of a NaFe_(0.6)Mn_(0.4)PO_(4)(NFMP)cathode with triphylite structure achieved from the conversion of a LiFe0.6Mn0.4PO4(LFMP)olivine for application in Na-ion *** work initially characterizes the structure,morphology and performances in sodium cell of NFMP,achieving a maximum capacity exceeding 100 mAh g^(−1)at a temperature of 55℃,adequate rate capability,and suitable retention confirmed by ex-situ ***,the study compares in parallel key parameters of the NFMP and LFMP such as Na^(+)/Li^(+)ions diffusion,interfacial characteristics,and reaction mechanism in Na/Li cells using various electrochemical *** data reveal that relatively limited modifications of NFMP chemistry,structure and morphology compared to LFMP greatly impact the reaction mechanism,kinetics and electrochemical *** changes are ascribed to the different physical and chemical features of the two compounds,the slower mobility of Na^(+)with respect to Li^(+),and a more resistive electrode/electrolyte interphase of sodium compared with ***,the study reveals analogue trends of the charge transfer resistance and the ion diffusion coefficient in NFMP and LFMP during the electrochemical process in ***,the NFMP achieved herein is suggested as a possible candidate for application in a low-cost,efficient,and environmentally friendly Na-ion battery.

关键词： NaFe_(0.6)Mn_(0.4)PO_(4)NFMP Olivine Na-ion lon transport Interphase

Performance of evolutionary optimized machine learning for modeling total organic carbon in core samples of shale gas fields

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum 2024年第1期10卷 150-164页

作者： leonardo Goliatt C.M.Saporetti L.C.Oliveira E.Pereira Department of Computational and Applied Mechanics Federal University of Juiz de Fora Department of Computational Modeling Polytechnic Institute Rio de Janeiro State University Petrobras Department of Stratigraphy and Paleontology Rio de Janeiro State University

Rock samples' TOC content is the best indicator of the organic matter in source rocks. The origin rock samples' analysis is used to calculate it manually by specialists. This method requires time and resources because it relies on samples from many well intervals in source rocks. Therefore, research has been done to aid this effort. Machine learning algorithms can estimate total organic carbon instead of well logs and stratigraphic studies. In light of these efforts, the current work present a study on automating the total organic carbon estimation using machine learning approaches improved by an evolutionary methodology to give the model flexibility and precision. Genetic algorithms, differential evolution, particle swarm optimization, grey wolf optimization, artificial bee colony, and evolution strategies were used to improve machine learning models to predict TOC. The six metaheuristics were integrated into four machine learning methods: extreme learning machine, elastic net linear model, linear support vector regression, and multivariate adaptive regression splines. Core samples from the YuDong-Nan shale gas field, located in the Sichuan basin, were used to evaluate the hybrid strategy. The findings show that combining machine learning models with an evolutionary algorithms in a hybrid fashion produce flexible models that accurately predict TOC. The results show that, independent of the metaheuristic used to guide the model selection, optimized extreme learning machines attained the best performance scores according to six metrics. Such hybrid models can be used in exploratory geological research,particularly for unconventional oil and gas resources.

关键词： Total organic carbon Hybrid models Automated machine learning Evolutionary algorithms Geology

Characterization of Arroyo Verde Epithermal Deposit:Paragenesis,Mineral Geochemistry,Geochronology and Fluid Inclusions in Lower Chon Aike Volcanism,Argentina

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第1期35卷 62-84页

作者： Cecilia Pavón Pivetta leonardo Benedini Paulo Marcos Ma.Agustina Cócola Mercedes Virginia Barros Daniel Gregori leonardo Strazzere Anderson Costa dos Santos Mauro C.Geraldes Instituto Geologico del Sur(INGEOSUR) Universidad Nacional del Sur(UNS)-Consejo Nacional de Investigaciones Cientificas y Tecnicas(CONICET)Bahia Blanca 8000Argentina Dpto.de Geologia Universidad Nacional del Sur(UNS)Bahia Blanca 8000Argentina Universidad Nacional de Rio Negro Instituto de Investigacion en Paleobiologia y GeologiaGeneral Roca 8332Argentina Universidade do Estado do Rio de Janeiro Faculdade de GeologiaDepartamento de Mineralogia e Petrologia igneaRiodeJaneiro20559-900Brazil Geobiotec Departamento de GeocienciasUniversidade de AveiroAveiro 3800-002Portuga

Arroyo Verde epithermal deposit,in the North Patagonia region of Argentina,is located within the Lower Chon Aike volcanism and is developed between 192.6±2.5 Ma(mineralization host rock)and 189.5±2.6 Ma(overlying lava).Marifil volcanic complex is the host rock for these veins,veinlets and *** particular small deposit has developed low to intermediate sulphidation characteristics,with gangue mineral textures associated with several ore *** probe microanalysis determines electrum,silver minerals such as acanthite,and tetrahedrite,related Ag-Cu minerals like jalpaite,mckinstryite,stromeyerite,and base metals like chalcopyrite,sphalerite,galena and *** inclusions in quartz of two out of five events indicate that these Low Jurassic veins were formed due to subtle boiling and dilution mechanisms and by low-salinity(3.4 wt.%to 6.7 wt.%NaCl Eq)magmatic-hydrothermal fluid at 225 to 310℃.The fluid inclusion measurements that indicate boiling(Event 3)were plotted,and based on this data,we interpret that the Arroyo Verde deposit has been eroded between 550 and 700 *** particular character has not been previously recorded for other sectors of the eastern north Patagonian region.

关键词： epithermal deposit Ag minerals mineral geochemistry fluid inclusions Chon Aike geochronology

Stochastic seismic inversion and Bayesian facies classification applied to porosity modeling and igneous rock identification

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第2期21卷 918-935页

作者： Fábio Júnior Damasceno Fernandes leonardo Teixeira Antonio Fernando Menezes Freire Wagner Moreira Lupinacci Exploratory Interpretation and Reservoir Characterization Group(GIECAR) Department of Geology and GeophysicsFederal Fluminense UniversityNiter oiRJ24210-346Brazil Petrobras Rio de JaneiroRJ20231-030Brazil National Institute of Science and Technology of Petroleum Geophysics(INCT-GP/CNPQ) Niter oiRJ24210-346Brazil

We apply stochastic seismic inversion and Bayesian facies classification for porosity modeling and igneous rock identification in the presalt interval of the Santos Basin. This integration of seismic and well-derived information enhances reservoir characterization. Stochastic inversion and Bayesian classification are powerful tools because they permit addressing the uncertainties in the model. We used the ES-MDA algorithm to achieve the realizations equivalent to the percentiles P10, P50, and P90 of acoustic impedance, a novel method for acoustic inversion in presalt. The facies were divided into five: reservoir 1,reservoir 2, tight carbonates, clayey rocks, and igneous rocks. To deal with the overlaps in acoustic impedance values of facies, we included geological information using a priori probability, indicating that structural highs are reservoir-dominated. To illustrate our approach, we conducted porosity modeling using facies-related rock-physics models for rock-physics inversion in an area with a well drilled in a coquina bank and evaluated the thickness and extension of an igneous intrusion near the carbonate-salt interface. The modeled porosity and the classified seismic facies are in good agreement with the ones observed in the wells. Notably, the coquinas bank presents an improvement in the porosity towards the top. The a priori probability model was crucial for limiting the clayey rocks to the structural lows. In Well B, the hit rate of the igneous rock in the three scenarios is higher than 60%, showing an excellent thickness-prediction capability.

关键词： Stochastic inversion Bayesian classification Porosity modeling Carbonate reservoirs Igneous rocks

Pulsed electromagnetic field stimulation enhances neurite outgrowth in neural cells and modulates inflammation in macrophages

在线全文

学校读者我要写书评

暂无评论

Engineered Regeneration 2024年第1期5卷 80-91页

作者： Francesco Fontana Andrea Cafarelli Francesco Iacoponi Soria Gasparini Tiziano Pratellesi Abigail NKoppes leonardo Ricotti The BioRobotics Institute Scuola Superiore Sant’Anna56127 PisaItaly Department of Excellence in Robotics&AI Scuola Superiore Sant’Anna56127 PisaItaly BAC Technology s.r.l. 50063 FlorenceItaly Department of Chemical Engineering Northeastern UniversityBostonMA 02115USA Department of Bioengineering Northeastern UniversityBostonMA 02115USA Department of Biology Northeastern UniversityBostonMA 02115USA

Nerve regeneration following traumas remains an unmet *** application of pulsed electromagnetic field(PEMF)stimulation has gained traction for a minimally invasive regeneration of ***,a sys-tematic exploration of different PEMF parameters influencing neuron function at a cellular level is not *** this study,we exposed neuroblastoma F11 cells to PEMF to trigger beneficial effects on neurite *** carrier frequencies,pulse repetition frequencies,and duty cycles were screened with a custom ad hoc setup to find the most influential parameters values.A carrier frequency of 13.5 MHz,a pulse repetition frequency of 20 Hz,and a duty cycle of 10%allowed maximal neurite outgrowth,with unaltered viability with respect to non-stimulated ***,in a longer-term analysis,such optimal conditions were also able to in-crease the gene expression of neuronal expression markers NeuN and Tuj-1 and transcription factor ***,the same optimal stimulation conditions were also applied to THP-1 macrophages,and both pro-inflammatory(TNF-α,IL-1β,IL-6,IL-8)and anti-inflammatory cytokines(IL-10,CD206)were *** optimal PEMF stimulation parameters did not induce differentiation towards an M1 macrophage phenotype,decreased IL-1β and IL-8 gene expression,decreased TNF-α and IL-8 cytokine release in M1-differentiated cells,increased IL-10 and CD206 gene expression,as well as IL-10 cytokine release in M0 *** specific PEMF stimulation regime,which is optimal in vitro,might have a high potential for a future in vivo translation targeting neural regeneration and anti-inflammatory action for treating peripheral nerve injuries.

关键词： Nerve regeneration Biophysical stimulation Pulsed electromagnetic fields(PEMF) Neurite outgrowth Anti-inflammatory Peripheral nerve injuries

Global paleobiogeography of Albian—Cenomanian(mid-Cretaceous)marine ostracods

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2024年第2期13卷 212-236页

作者： Bernardo Vázquez-García Jorge Villegas-Martín Gerson Fauth leonardo Borghi Aristóteles De Moraes Rios Netto Post-Graduate Program in Geology Unisinos UniversitySao LeopoldoRSBrazil Technological Institute of Paleoceanography and Climate Change-Itt Oceaneon Unisinos UniversitySao LeopoldoRSBrazil Laboratory of Sedimentary 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 potential for providing important information for paleobiogeography,studies using ostracod assemblages compiled from global datasets have been scarce so *** this study,the paleogeographic implications of the relationship between different ostracod assemblages are analyzed and discussed for the Albian and *** compiled an ostracod dataset at the genus level,with 168 genera for the Albian and 174 for the Cenomanian,to which different multivariate statistical methods of grouping were *** affinity between different ostracod assemblages from different regions allowed for the delineation of 30 operational geographic units(OGUs)for the Albian,and 32 OGUs for the Cenomanian,grouped in three paleobiogeographic units(PBUs;Megatethys,Persia,and Austral)and one sub-unit(PBSU;Maghreb associated to the Megatethys).The Maghreb PBSU showed minor changes between the Albian and *** relationship among the OGUs grouped in each PBU is related to different factors,such as eustatic sea level events,similar climatic zones,and marine current circulation patterns.A relationship was observed between the Gabon and Nigeria OGUs with the Persia PBU,which suggests a direct east—west connection between them during the *** affinity observed in the Austral PBU between the South American,South African,and Australian regions during the Albian can be explained by their relative geographic isolation due to the Walvis Ridge *** eventual flooding of this barrier led to the relationship observed between the SE Brazilian and Bolivian regions with the Austral ***,the data also suggested that the separation of the Indian subcontinent from the Austral PBU took place during the Cenomanian.

关键词： Operational geographic units Paleobiogeographic units Albian Cenomanian Marine ostracods

Environmental changes affect picoplanktonic composition in Antarctic Peninsula ponds

在线全文

学校读者我要写书评

暂无评论

Advances in Polar Science 2024年第1期35卷 108-122页

作者： Micaela DÍAZ leonardo LAGOMARSINO Gabriela MATALONI Marianela BELTRÁN Marcela LIBERTELLI Paulina FERMANI Laboratorio de Ecología Acuática INTECH-UNSAM-CONICETChascomús 7130Argentina Facultad de Ciencias Naturales y de la Salud UNPSJBComodoro Rivadavia 9000Argentina Laboratorio de Biodiversidad Limnología y Biología de la Conservación3IA-UNSAM-CONICETBuenos Aires 1650Argentina Departamento de Biología de Predadores Tope Instituto Antártico ArgentinoBuenos Aires 1650Argentina Laboratorio de Microbiología Ambiental IBIOMAR/CESIMAR-CENPAT-CONICETPuerto Madryn 9120Argentina

Antarctic Peninsula is experiencing one of the largest global warming events *** water bodies generated by the melting of snow in summer are numerous,and they might act as sentinels of climate change due to their rapid response and ability to integrate catchment *** in climate can influence the structure of microbial communities which dominate these freshwaters ***,we characterize three ponds at Cierva Point(Antarctic Peninsula)by examining their physico-chemical and morphological characteristics and we explored how different factors modify the structure of the microbial *** studied the abundance and biomass of heterotrophic bacteria,picocyanobacteria and picoeukaryote algae during January and February of two consecutive summers(2017 and 2018).We found that ponds had different limnological characteristics,due to their location,geomorphological features and presence of the surrounding flora and ***-chemical parameters as well as microbial community differed between ponds,months and *** 2017,most ponds were oligo to mesotrophic *** larger accumulated rainfall(as a result of environmental changes on the Antarctic Peninsula)during 2018,particularly in February,causes nutrient runoff into water *** affects those ponds with the highest seabird circulation,such as gentoo penguin,increasing *** a result,picoplanktonic abundances were higher,and the community structure shifts to a largely heterotrophic bacteria dominated *** results suggest that these communities could act as sentinels to environmental changes,anticipating a future with mostly hypertrophic ponds.

关键词： microorganisms freshwater environments climate change Cierva Point

同方期刊数据库