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Understanding plant drought resistance in a mediterranean coastal sand dune ecosystem:differences between native and exotic invasive species

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Journal of Plant Ecology 2018年第1期11卷 26-38页

作者： Cristina Antunes Ana Júlia Pereira Patrícia Fernandes margarida Ramos Lia Ascensão Otília Correia Cristina máguas Centre for Ecology Evolution and Environmental ChangesFaculdade de CiênciasUniversidade de LisboaCampo Grande1749-016 LisboaPortugal PPG-Ecologia Instituto de BiologiaCP 6109Universidade Estadual de Campinas-UNICAMP13083-970 CampinasSão PauloBrazil SPBotânica-Botanical Society of Portugal Travessa do Jardim 3A-dos-Potes2615-018 Alverca do RibatejoPortugal CESAm-Centre for Environmental and marine Studies Faculdade de Ciências-CBVUniversidade de Lisboa1749-016 LisboaPortugal

Aims mediterranean coastal dunes are habitats of great conservation interest,with a distinctive and rich *** the last century,Acacia spp.,native from Australia,have been introduced in Portugal,with the objective of stabilizing sand dunes,and since have become dominant in numerous sand dune *** invasion process led to the reduction of native plant species richness,changed soil characteristics and modified habitat’s microclimatic *** aim of this research was to typify and compare,in mediterranean sand dune ecosystems,the ecophysiological responses to drought of helichrysum italicum and Corema album,two native species,and Acacia longifolia,an exotic invasive *** addressed the following specific objectives:(i)to com-pare water relations and water use efficiencies,(ii)to evaluate water stress,(iii)to assess water use strategies and water sources used by plants and(iv)to evaluate the morphological adaptations at leaf and phyllode *** In order to obtain an integrative view of ecophysiological patterns,water relations and performance measuring methods have been applied:predawn(ψPD)and midday(ψmD)water potential,chloro-phyll a fluorescence,oxygen isotopic composition of xylem,rain and groundwater(δ18O)and leaf carbon isotopic discrimination(Δ13C).The leaf characteristics of the three species,as well as the histochemistry of non-glandular trichome cell walls,were also studied to identify morpho-traits related to drought *** Findings The results support our initial hypothesis:although *** clearly possesses a degree of resistance to water stress,such ability is provided by a different water strategy,when compared to native *** relied on morphological adaptations to restrict water loss,whereas the invasive species adjusted the water uptake as a way to balance their limited ability of restricting water *** corroborate that woody native species(i)have a conservative water-saving strategy an

关键词： ecophysiology water use strategy leaf morphology Acacia longifolia Corema album helichrysum italicum

The ecological performance of metallophyte plants thriving in geochemical islands is explained by the Inclusive Niche hypothesis

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Journal of Plant Ecology 2015年第1期8卷 41-50页

作者： helena C.Serrano Cristina Antunes manuel J.Pinto Cristina máguas maria Amélia martins-Loução Cristina Branquinho Centro de Biologia Ambiental Faculdade de CiênciasUniversidade de LisboaCampo Grande1749-016 LisboaPortugal Jardim Botânico do museu Nacional de história Natural e da Ciência Universidade de LisboaR.Escola Politécnica 581250-102 LisboaPortugal

Aims The Inclusive Niche hypothesis has not been validated for plants using ecophysiological *** few experiments have measured growth and competition but not the physiological response of plants.A metallophyte plant that hyperaccumulates aluminium(Al),Plantago almogravensis,showed a defined spa-tial distribution by occurring mostly on vegetation gaps associ-ated with metalliferous areas(geochemical islands).This case was used to determine,in situ,whether the Inclusive Niche hypothesis was suitable to explain the extent of the species real-ized *** The vegetation associated with *** geochemical islands in the SW coast of Portugal was *** biotic(neighbouring plants)and abiotic(edaphic)components of the niche were cor-related with parameters of the plant’s ecological and physiological performances(plant density and cover;leaf C and N concentration and isotopic composition;growth).The results were obtained using image analysis,abundance and morphological measures,isotopic signatures and chemical *** Findings The species showed better physiological performance where its ecological performance was lower due to trade-offs with environ-mental *** species’realized niche was mostly limited by shrub competition and soil *** limits contribute to explain the rarity status of the species:the species has a poor capacity to compete but,due to an enhanced Al-tolerance and Al-hyperaccumulator trait,has the ability to find refuge in geochem-ical islands that are too harsh for most other *** work,based on ecophysiological field studies,provides support for the Inclusive Niche hypothesis relating to plant species.

关键词： competition ecophysiology edaphic endemism hyperaccumulation stable isotopes trade-off

Immunomodulatory biomaterial-based wound dressings advance the healing of chronic wounds via regulating macrophage behavior

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Regenerative Biomaterials 2022年第1期9卷 1131-1142页

作者： Ana Beatriz Sousa Artur P.Águas mário A.Barbosa Judite N.Barbosa i3S—Instituto de Inovaçäo e Investigaçäo em Saúde Universidade do PortoRua Alfredo Allen2084200-125 PortoPortugal INEB—Instituto de Engenharia Biomédica Rua Alfredo Allen2084200-125 PortoPortugal ICBAS—Instituto de Ciências Biomédicas Abel Salazar Universidade do PortoRua de Jorge Viterbo Ferreira2284050-313 PortoPortugal UmIB—Unit for multidisciplinary Biomedical Research of ICBAS—Instituto de Ciências Biomédicas de Abel Salazar Universidade do PortoRua de Jorge Viterbo Ferreira2284050-313 PortoPortugal

Successful wound healing is a process that has three overlying phases:inflammatory,proliferative and *** wounds are characterized by a perpetuated inflammation that inhibits the proliferative and remodeling phases and impairs the wound *** are key modulators of the wound healing ***,they are responsible for the wound cleaning and for the phagocytosis of pathogens and afterwards they lead to the resolution of the inflammatory response and they express growth factors important for angiogenesis and cytokines and growth factors needed for cell proliferation and deposition of extracellular *** phenotype of the macrophage changes gradually throughout the healing process from the initial m1 pro-inflammatory phenotype characteristic of the acute response to the m2 pro-regenerative phenotype that allows an accurate tissue *** chronic wounds,m1 pro-inflammatory macrophages persist and impair tissue *** such,immunomodulatory biomaterials arise as promising solutions to accelerate the wound healing *** this review,we discuss the importance of macrophages and their polarization throughout the different phases of wound healing;macrophage dysfunction in chronic wounds and the use of immunomodulatory biomaterials to overcome the critical problem of chronic wounds-the continued inflammatory phase that impairs healing.

关键词： wound healing chronic wounds macrophage immunomodulatory biomaterials

SmEARED CRACKING FEm SImULATION OF ALKALI SILICA EXPANSION USING A NEW mACROSCOPIC COUPLED mODEL

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SMEARED CRACKING FEM SIMULATION OF ALKALI SILICA EXPANSION U...

Simultaneous Determination of Ten Endocrine hormone Disrupters in Water Using SPE/LC-(ESI)mS-mS

第十二届国际混凝土碱集料反应会议

作者： Eduardo m.R.Fairbairn Fernando L.B.Ribeiro Romildo D.Toledo-Filho Luciana E.Lopes marcos m.Silvoso marcia F.F.guas Quintiliano m.Guedes COPPE/The post-Graduate Engineering Institute Universidade Federal do Rio de JaneiroC.P.68506CEP 21945-970-Rio de Janeiro-RJ-Brasil COPPE/The post-Graduate Engineering Institute Universidade Federal do Rio de JaneiroC.P.68506CEP 21945-970-Rio de Janeiro-RJ-Brasil COPPE/The post-Graduate Engineering Institute Universidade Federal do Rio de JaneiroC.P.68506CEP 21945-970-Rio de Janeiro-RJ-Brasil COPPE/The post-Graduate Engineering Institute Universidade Federal do Rio de JaneiroC.P.68506CEP 21945-970-Rio de Janeiro-RJ-Brasil COPPE/The post-Graduate Engineering Institute Universidade Federal do Rio de JaneiroC.P.68506CEP 21945-970-Rio de Janeiro-RJ-Brasil FURNAS Centrais Elétricas SA-DEC)-Rua Real Grandeza 219 CEP 22281-031-Rio de Janeiro-RJ-Brasil FURNAS Centrais Elétricas SA-DEC)-Rua Real Grandeza 219 CEP 22281-031-Rio de Janeiro-RJ-Brasil

＜正＞ We present an ASR thermo-chemo-mechanical expansion model recently developed, whose main feature is the representation of the stress-induced anisotropy, which is taken into account by means of a classical smeared cracking model that was implemented in a 3D Finite Element code. This model considers the influence of temperature and humidity in the development of ASR. Since cracking occurs generally at the beginning of the swelling process, it is suggested that the assessment of the reaction characteristics in free expansion tests could be attained considering a cracked specimen. hence, an inverse analysis is used to determine ASR parameters. Besides the validation of the model by the simulation of laboratory tests, it was applied to the simulation of alkali-silica expansion in a real gravity dam. We computed the displacements at the crest of the block comparing it with measures taken in the field for the last 25 years. The good correlation between experimental and numerical data displayed the accuracy of the model indicating its potentialities to engineering applications.

关键词： Alkali-silica reaction numerical modeling coupled model cracking

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Journal of Water Resource and Protection 2010年第9期2卷 818-829页

作者： marta henriques Vitor Vale Cardoso Alexandre mourao Rodrigues Elisabete ferreira maria Joao Benoliel Cristina m.m.Almeida Faculty of Pharmacy Laboratory of HidrologyLisbonPortugal EPAL(Empresa Portuguesa dasÁguas Livres S.A.)Laboratorio Central da EPALLisbonPortugal imed(The Institute for medicines and Pharmaceutical Sciences) Faculty of PharmacyLisbonPortugal

The aim of this study was developed and validated an analytical method based on liquid chromatography and tandem mass spectrometry after solid phase extraction to monitorizing ten endocrine hormone disrupters in Lisbon drinking water system. Natural and synthetic hormones (17-β-estradiol, ethinylestradiol, estriol, estrone, progesterone, mestranol and diethylstilbestrol) and some industrial products (4-n-nonylphenol, 4-tert-octylphenol and bisphenol A) were studied. mass spectrometer detection parameters were optimized, such as the best conditions for the precursor ion formation, namely cone voltage, when applying negative and positive electrospray ionization, and also collision energy for mRm1 and mRm2 transitions. The best conditions of the solid phase extraction (SPE) using Waters Oasis hLB (6 mL, 200 mg) and Isolute C18 (EC) (6 ml, 1000 mg) were also optimized. The method was validated through the application of several statistical tests and the uncertainty estimation of the analytical assay. This method showed a very good linear range for all the studied analytes with determination coefficients (r2) between 0.9962 and 0.9999 and coefficients of variation lower than 4%. There were no significant differences between recoveries obtained with the studied matrices, like groundwater, surface water and water for human consumption. In these matrices, the recovery values varied between 32 and 95%. The limits of method detection were between 0.28 and 22 ng/L. The validated method was applied for the analysis of water samples from the EPAL (Empresa Portuguesa das águas Livres, S.A.) water supply system including tap water, spring water, groundwater, and river water. Some target compounds (bisphenol A, progesterone, 4-tert-octylphenol, and 4-n-nonylphenol) were found in trace amounts in analysed waters.

关键词： Water Analysis Endocrine Disruptors Tandem mass Spectrometry Solid-phase Extraction Uncertainty Evaluation

The influence of growth interruption in quantum dot laser

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The influence of growth interruption in quantum dot laser

Water hyacinth Control by Glyphosate herbicide and Its Impact on Water Quality

第一届全国纳米技术与应用学术会议

作者： Wang h.. Niu Z.C, FENG S.L.National Laboratory for Supcrlalticcs and microslructurcs, Institute of Semiconductors, Chinese Academyof Sciences. P. 0. Box 912. Beijing China 100083

＜正＞ Growth interruption is introduced during the growth of GaAs capping layer of self-organized quantum dots. The comparison of two QD lasers with and without growth interruption in their active regions show that growth interruption leads to lower threshold current, higher characteristic temperature. weaker dependent on temperature of lasing energy.

关键词： InAs/guas Quantum dots Quantum dot laser Growth interruption.

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Journal of Water Resource and Protection 2020年第1期12卷 60-73页

作者： Evandro L. C. Souza José T. Filho Edivaldo D. Velini José R. m. Silva Kelly C. Tonello Luiz L. Foloni Admílson C. Barbosa Thiago A. Freato School of Agricultural Engineering State University of Campinas Campinas Brazil Department of Plant Breeding an Protection College of Agricultural Sciences Sao Paulo State University Botucatu Braz Departament of Environmental Sciences Federal University of São Carlos Sorocaba Brazil Empresa metropolitana de águas e Energia S.A. (EmAE) São Paulo Brazil Center of meteorological and Climate Researchers Applied to Agriculture State University of Campinas Campinas Brazil

The aim of this study was to evaluate the herbicide glyphosate under aquatic environment conditions, in a controlled and closed experimental field, in the management of water hyacinth (Eichhornia crassipes) in reservoirs. Twenty reservoirs (polyethylene water tanks) with storage capacity of 1000 liters were used, without water flow and without evapotranspired water replacement (worst case), being 04 for each treatment. The adult plants were placed in the water tanks to provide 90% surface occupation of the reservoir. Five treatments with four repetitions were considered, being: 1) Reservoir colonized by water hyacinth without control;2) Reservoir colonized by water hyacinth, controlled by glyphosate;3) Reservoir colonized by water hyacinth, controlled by freezing;4) Reservoir without water hyacinth and glyphosate application and 5) Reservoir without water hyacinth and no glyphosate application. The glyphosate herbicide was used at the highest recommended dose, 7.0 L·ha-1 or 3360 g of acid equivalent per ha, applied using carbon dioxide precision equipment (backpack sprayer), providing a flow rate of 200 L·ha-1. The water samples were collected at the time of application, 6, 12, 18 and 24 hours after application and also at 2, 4, 8, 16, 32 and 64 days after application, in the morning, always at the same time, also between 8 and 9 h. The method used for determination of residues was by high performance liquid chromatography (hPLC) and mass spectrometry with a mass selective detector. Low concentrations of glyphosate and aminomethylphosphonic acid (AmPA) were found in both reservoirs that received application of the product. The half-life of glyphosate in water to the reservoirs with water hyacinth was 11 days and in the reservoirs without water hyacinth was 21 days. The results show a low potential of environmental impact of glyphosate use in the control of water hyacinth in reservoirs.

关键词： Eichhornia crassipes Weed Control herbicides Environmental Impact

Efficacy of Glyphosate in Water management and the Effects on Water Quality

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Journal of Water Resource and Protection 2020年第1期12卷 50-59页

作者： Evandro L. C. Souza José T. Filho Edivaldo D. Velini José R. m. Silva Kelly C. Tonello Luiz L. Foloni German D. D. Gonzalez Admilson C. Barbosa Thiago A. Freato School of Agricultural Engineering State University of Campinas Campinas Brazil Department of Plant Breeding an Protection College of Agricultural Sciences Sao Paulo State University Botucatu Brazi Departament of Environmental Sciences Federal University of São Carlos Sorocaba Brazil Empresa metropolitana de águas e Energia S.A. (EmAE) São Paulo Brazil Center of meteorological and Climate Researchers Applied to Agriculture State University of Campinas Campinas Brazil

The present work aimed to evaluate the behavior of glyphosate herbicide in aquatic environment, considering some water quality parameters, in reservoir conditions without flow and without replacement of evapotranspired water. Twenty reservoirs (polyethylene water tanks) with a storage capacity of 1000 liters were used. The recommended herbicide dose according to the manufacturer was 7.0 L or 3360 grams of acid equivalent per hectare. For application in the reservoirs, a precision equipment was used to carbon dioxide (CO2), providing a flow of 200 L·ha-1. Freezing macrophyte death was achieved by storing the plants in a freezer at -18°C for a period of 48 hours. The analyses of control efficiency were performed at 7, 14, 21, 28, 35 and 42 days after application (DAA). Water samples for analysis of quality indicators, ph and dissolved oxygen were collected weekly for nine weeks. The obtained result allows concluding that the herbicide glyphosate presented excellent control efficiency of water hyacinth and did not significantly alter the water quality parameters ph and dissolved oxygen, indicating its use in the management of this macrophyte.

关键词： herbicide ph Dissolved Oxygen Environmental Impact