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Dynamics of phosphorus in sediments of a naturally acidic lake

International Journal of Sediment Research 2013年第1期28卷 90-102页

作者： Temporetti pedro Snodgrass KIMBERLEY pedrozo FERNANDO Centro Regional Universitario Bariloche Universidad Nacional del ComahueCONICETQuintral 12508400 BarilocheArgentina Staff Environmental Engineer Water and Environmental Technologies 480 East Park StreetSuite 200 ButteMT59701MontanaEEUU INIBIOMA Centro Regional Universitario BarilocheUniversidad Nacional del ComahueCONICETQuintral 12508400 BarilocheArgentina

The mechanisms which controls the fixation and/or release of P in sediment of an extremely acidic lake（pH = 2.0 to 3.0） and its response to the influence of eutrophic urban waste water were *** results,in the chemical composition,in the mineralogy of the sediment and in the material as obtained from sediment traps,show that the lake sediments are mainly volcanic material reflecting volcanic features of the *** sedimentation rate calculated for the lake(2.5×10;mg m;day;) was higher than that observed in other similar glacial lakes in both Andean Patagonia and also elsewhere in the *** Total Phosphorus concentration in sediments was higher than figures reported by other authors for mining acid lakes,and the main fraction of P was found associated with organic *** was no control by Fe or Al on P,because both are in solution at pH < *** was concluded that changes in the natural input of nutrients（derivatives of Copahue volcano fluid,the discharge of sewage,or basin run-off） are responsible for a high concentration of SRP and N-NH;in the *** experiments showed that sediments have no ability to retain phosphorus and a continuous release of P from the sediments into the water column was *** assays where the pH was artificially increased showed that the P still remains in solution until at least pH *** was concluded that changes in the natural input of nutrients due to:1) the volcanic fluids,2) the increase in sewage charges,or 3) surface runoff upstream,maintain a high trophic state with high concentrations of dissolved P and N-NH;,although the threshold of neutral pH in the lake is *** study will enable a better understanding about of the mechanism of release/fixation of phosphorus in acidic sediments in order to assist in making decisions regarding the conservation and management of this natural environment.

关键词： Sediments Phosphorus release Acidic lake

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Meteorological drought features in northern and northwestern parts of Mexico under different climate change scenarios

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Journal of Arid Land 2017年第1期9卷 65-75页

作者： Carlos ESCALANTE-SANDOVAL pedro NUNEZ-GARCIA Faculty of Engineering National Autonomous University of Mexico Cd. Universitaria Coyoacan 04510 Mexico

Meteorological drought has been an inevitable natural disaster throughout Mexican history and the northern and northwestern parts of Mexico（i.e., the studied area）, where the mean annual precipitation（MAP） is less than 500 mm, have suffered even more from droughts in the past. The aim of this study was to conduct a meteorological drought analysis of the available MAP data（1950–2013） from 649 meteorological stations selected from the studied area and to predict the drought features under the different IPCC-prescribed climate change scenarios. To determine the long-term drought features, we collected 1×10~4 synthetic samples using the periodic autoregressive moving average（PARMA） model for each rainfall series. The simulations first consider the present prevailing precipitation conditions（i.e., the average from 1950 to 2013） and then the precipitation anomalies under IPCC-prescribed RCP 4.5 scenario and RCP 8.5 scenario. The results indicated that the climate changes under the prescribed scenarios would significantly increase the duration and intensity of droughts. The most severe impacts may occur in the central plateau and in the Baja California Peninsula. Thus, it will be necessary to establish adequate protective measures for the sustainable management of water resources in these regions.

关键词： meteorological drought synthetic simulation climate change water stress evapotranspiration

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Lessons learnt from a deep excavation for future application of the observational method

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第3期10卷 468-485页

作者： Raul Fuentes Anton Pillai pedro Ferreira School of Civil Engineering University of LeedsLeedsLS2 9JTUK Ove Arup and Partners 13 Fitzroy StreetLondonW1T 4BQUK Department of Civil Environmental&Geomatic EngineeringUniversity College LondonChadwick BuildingGower StreetLondonWC1E 6BTUK

This paper draws lessons learnt from a comprehensive case study in overconsolidated clay. Apart from the introduction of the case study, including field measurements, the paper draws on the observations and a three-dimensional（3 D） numerical analysis to discuss the implications of observations in the application of the observational method（OM） in the context of the requirements of EUROCODE 7（EC7）.In particular, we focus on corner effects and time-dependent movements and provide initial guidance on how these could be considered. Additionally, we present the validation of a new set of parameters to check that it provides a satisfactory compliance with EC7 as a set of design parameters. All these findings and recommendations are particularly important for those who want to use the OM in similar future projects.

关键词： Deep excavation Basement Ground movements Wall movements Retaining wall Corner effects Time-dependent movements

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Abiotic drivers shape seed inputs and outputs in a tropical wetland on Croton trinitatis population

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Ecological Processes 2022年第1期11卷 65-77页

作者： Francielli Bao Arnildo Pott pedro Manuel Villa Centro de Avaliação da Biodiversidade Pesquisa e Conservação do Cerrado(CBC)Instituto Chico Mendes de Conservação da Biodiversidade(ICMBio)BrasíliaDF 70670-350Brazil Programa de Pós-Graduação em Biologia Vegetal Instituto de BiociênciasUniversidade Federal de Mato Grosso do SulCampo GrandeMS 79070-900Brazil Programa de Pós-Graduacão em Botânica Departamento de Biologia VegetalUniversidade Federal de ViçosaViçosaMG 36570-900Brazil Fundación para la Conservación de la Biodiversidad Mérida 7101Venezuela

Background:Predicting how natural and anthropogenic drivers shape different ecological indicators,such as plant populations along environmental gradients,can be a relevant tool for establishing management and conservation criteria of tropical *** aimed to assess the effects of seasonal flood disturbance,type of grasslands and topographical conditions on Croton trinitatis population distribution in a tropical ***:The study was carried out in a seasonally flooded grassland(Central-West Brazil).We conducted samplings of soil on the dry and flood hydrophases of the *** took the samples in eight seasonal ponds,with 1 km interval between *** were marked during the flood period,observing the water level,one in the lowest zone,in the middle of the pond=low(ca.60 cm deep),one at the pond edge=mid(ca.30 cm deep)and one in the higher zone,on the external part=high(ca.1 cm deep).Results:The results showed that the topography,seasonality,and types of grassland determine differences in the abundance patterns of adult plants and seedlings,and seed bank and seed *** abiotic factors can shape plant population-related ecological processes and patterns,with outputs(germination and predation)and inputs(local dispersion and from neighbouring areas)of proportional seeds for the population maintenance in this ***:We emphasize the importance of these findings,to show that abiotic factors are not the only ones to be considered in ecological studies of distribution and structuring of populations in habitats with extreme seasonal events.

关键词： Environmental filter Flood disturbance Pantanal Population ecology Seasonal change Seed predation Seedling Soil seed bank

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Abscisic Acid Catabolism Generates Phaseic Acid, a Molecule Able to Activate a Subset of ABA Receptors

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Molecular Plant 2016年第11期9卷 1448-1450页

作者： pedro L. Rodriguez Instituto de Biotogia Molecular y Celular de Plantas Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia 46022 Valencia Spain

Abscisic acid （ABA） catabolic pathways are conventionally thought of as routes for ABA inactivation and, thus, reduction of the well-known ABA responses to cope with stress. However, this point of view was challenged by the finding that some forms of hydroxylated ABA generated by ABA catabolism still maintain biological activity （Zou et al., 1995; Kepka et al., 2011）.

关键词： MICROSPORE-DERIVED EMBRYOS (+)-ABSCISIC ACID 8'-HYDROXYLASE METABOLITES NAPUS

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Biopolymers-based skin-interfaced triboelectric sensors

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Nano Research 2023年第9期16卷 11753-11782页

作者： Shujia Xu pedro Henrique de Souza Barbosa Wenzhuo Wu School of Industrial Engineering Purdue UniversityWest LafayetteIN 47907USA Flex Laboratory Purdue UniversityWest LafayetteIN 47907USA Regenstrief Center for Healthcare Engineering Purdue UniversityWest LafayetteIN 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA The Center for Education and Research in Information Assurance and Security(CERIAS) Purdue UniversityWest LafayetteIN 47907USA

Rapid advances in artificial intelligence,robotics,and remote healthcare have increased the demand for sustainable and highperformance wearable *** devices are gaining traction due to their self-powered operation capability and potential as wearable energy ***-interfaced triboelectric sensors(SITSs)can detect various mechanical signals and monitor physiological signals in ***-based SITSs are ideal for skin-interfaced applications since they are biocompatible and *** review focuses on the recent advancements of SITS made from biocompatible polymer materials,such as plant-based,animal-based,and synthetic polymers,and highlights their potential for various applications,including human–machine interface(HMI)and physiological *** addition,the fundamentals,challenges,and prospects of SITS based on biocompatible polymers are discussed.

关键词： skin interfaced triboelectric sensors wearable devices biopolymers

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Plant growth and nutrient use efficiency of two native Fabaceae species for mineland revegetation in the eastern Amazon

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Journal of Forestry Research 2020年第6期31卷 2287-2293页

作者： Silvio J.Ramos Markus Gastauer Simone K.Mitre Cecı´lio F.Caldeira Joyce R.Silva Antonio E.Furtini neto Guilherme Oliveira pedro W.M.Souza Filho Jose´O.Siqueira Instituto Tecnolo´gico Vale Rua Boaventura da Silva955Belem 66055-090Brazil Departamento de Ciencia do Solo Universidade Federal de LavrasLavras 37200-000Brazil

The primary challenge of mineland revegetation is the establishment of species able to cope with low availability of nutrients,especially in steep slopes such as of mine *** evaluated plant growth response and nutrient use efficiency(NUE)of two promising native Fabaceae species(Dioclea apurensis—liana from metalliferous savannas;Bauhinia longipedicellata—tree from Amazon rainforest)from the Caraja´s Mineral Province,eastern *** were grown separately in 2-kg pots filled with mining *** were fertilized with nitrogen,phosphorus,potassium(NPK),lime,and *** results showed increments on growth of both species when nutrients were applied to the mining *** showed increases in leaf area,plant height,stem diameter,and shoot dry mass production when NPK or NPK?micronutrients were applied,while *** was responsive to application of NPK?lime or NPK?lime?***,*** showed higher NUE than ***,especially at the lowest doses of N,P and *** findings may indicate a substantial advantage of *** for mineland revegetation,as this species may require lower nutrient inputs,being,therefore,a more sustainable way to revegetate degraded areas.

关键词： Fertilizer application Mining soil Tropical forest Nutrient use efficiency

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t-SNE:A study on reducing the dimensionality of hyperspectral data for the regression problem of estimating oenological parameters

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Artificial Intelligence in Agriculture 2023年第1期7卷 58-68页

作者： Rui Silva pedro Melo-Pinto CITAB-Centre for the Research and Technology of Agro-Environmental and Biological Sciences Inov4Agro-Institute for InnovationCapacity Building and Sustainability of Agri-Food ProductionUniversidade de Trás-os-Montes e Alto DouroQuinta dos PradosVila Real 5000-801Portugal Departamento de Engenharias Escola de Ciências e TecnologiaUniversidade de Trás-os-Montes e Alto DouroQuinta dos PradosVila Real 5000-801Portugal

In recent years there is a growing importance in using machine learning techniques to improve procedures in precision agriculture:in this work we perform a study on models capable of predicting oenological parameters from hyperspectral images of wine grape berries,a specially relevant topic to boost production tasks for ***,we explore the capabilities of a novel technique mostly used for visualization,t-Distributed Stochastic Neighbor Embedding(t-SNE),for reducing the dimensionality of the highly complex hyperspectral data and compare its performance with Principal Component Analysis(PCA)method,which despite the introduction of many nonlinear dimensionality reduction techniques over the years,had achieved the best results for real-world data across several studies in *** we explore the potential of Kernel t-SNE,an extension to the t-SNE method that allows for the usage of the technique in streaming data or online *** results show that,in a direct comparison,t-SNE achieves better metrics than PCA for most of the data sets in this work and that the regressor(Support Vector Regression,SVR)performs better with the t-SNE reduced features as inputs,accomplishing better predictions with lower error *** the results with current literature,our shallow learning model paired with t-SNE achieves either better or on par results than those reported,even competing with more advanced models that use deep learning techniques,which should propel the introduction of t-SNE in more studies that require dimensionality reduction.

关键词： Hyperspectral images Dimensionality reduction Regression T-SNE Support vector machines Wine grape berries

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Evaluation of Cinnamon by Solid-State NMR Employing Relaxometry

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Materials Sciences and Applications 2023年第3期14卷 142-147页

作者： pedro Paulo Merat Roberto Cucinelli neto Vitor Santos Ramos Maria Inês Bruno Tavares Instituto de Macromoléculas Professora Eloisa Mano (IMA) da Universidade Federal do Rio de Janeiro UFRJ Centro de Tecnologia Ilha do Fund&atildeo Rio de Janeiro Brasil IFRJ Avenida República do Paraguai Duque de Caxias Brasil

To evaluate the molecular dynamics and the molecular regions presented in the cinnamon types it was chosen to evaluate them without any treatment, and for that it was used low-field nuclear magnetic resonance (NMR) through the pulse sequence such as MSE-FID, an NMR sequence in the time domain, and from the longitudinal relaxation time (with a time constant T1), employing the inversion-recovery pulse sequence. The low-field NMR results indicate that the techniques chosen were a very good alternative to evaluate these types of samples food and their structural organization according to their constituents. The molecular mobility is different.

关键词： Cinnamon Low-Field NMR NMR Relaxation Functional Food

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Current and future therapeutic strategies for the treatment of retinal neurodegenerative diseases

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Neural Regeneration Research 2022年第1期17卷 103-104页

作者： Victoria Maneu pedro Lax Nicolás Cuenca Department of Optics Pharmacology and AnatomyUniversity of AlicanteAlicanteSpain Department of Physiology Genetics and MicrobiologyUniversity of AlicanteAlicanteSpain

The complex and mostly multiple and unknown aetiology of neurodegenerative diseases always give way to an intricate scenario of dying tissue that involves multiple cell mediators and cell *** neurodegenerative diseases of the central nervous system(CNS)share common mechanisms,regardless their origin:oxidative stress,neuroinflammation and cell ***,retinal degenerative diseases,with or without a genetic cause,as retinitis pigmentosa(RP),glaucoma,agerelated macular degeneration(AMD)or diabetic retinopathy(DR)do not differ in their basic mechanisms of cell death neither one to another,nor from those observed in other CNS diseases as Parkinson’s or Alzheimer’s(Cuenca et al.,2014).Indeed,the therapeutic findings should be able to be more or less easily extrapolated between these conditions,as far as they are directed to common dartboards.

关键词： diseases degenerative therapeutic

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