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Ponte M, Bettencourt N, Pereira E, Faria R, Ferreira N, Leite D, Carvalho M, Ferreira W, Albuquerque A, Gama V. A comparison of different diagnostic strategies based on anatomical and functional cardiac imaging for the detection of functionally significant coronary artery disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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102
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Pereira E, Castelhano M. The Influence of Scene Context on Parafoveal Processing of Objects. J Vis 2013. [DOI: 10.1167/13.9.513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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103
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Cardoso PG, D'Ambrosio M, Marques SC, Azeiteiro UM, Coelho JP, Pereira E. The effects of mercury on the dynamics of the peracarida community in a temperate coastal lagoon (Ria de Aveiro, Portugal). MARINE POLLUTION BULLETIN 2013; 72:188-196. [PMID: 23643340 DOI: 10.1016/j.marpolbul.2013.04.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 04/01/2013] [Accepted: 04/05/2013] [Indexed: 06/02/2023]
Abstract
This study focuses on the impact of mercury on the dynamics and bioaccumulation patterns of suprabenthic peracarida community along a mercury gradient. Suprabenthic peracarida was negatively affected in terms of biomass, diversity and productivity. Mysids including Mesopodopsis slabberi dominated the community, presenting a regular distribution along the Hg gradient, so are considered tolerant species to mercury. Then, isopods, the second most abundant group, dominated in the most contaminated areas being considered also a tolerant group. Contrarily, amphipods were negatively correlated with higher Hg concentrations, dominating in the intermediate areas, thus are considered more sensitive species. In addition, isopods and amphipods were the taxa with higher mercury body burden, followed by mysids. This paper highlights the importance of suprabenthic peracarida as a vehicle of mercury transference through the estuarine trophic web since it is a main link between benthic and pelagic levels and an essential food resource for numerous fish species.
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104
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Coelho JP, Mieiro CL, Pereira E, Duarte AC, Pardal MA. Mercury biomagnification in a contaminated estuary food web: effects of age and trophic position using stable isotope analyses. MARINE POLLUTION BULLETIN 2013; 69:110-5. [PMID: 23433553 DOI: 10.1016/j.marpolbul.2013.01.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 01/15/2013] [Accepted: 01/21/2013] [Indexed: 05/21/2023]
Abstract
The main aim of this study was to ascertain the biomagnification processes in a mercury-contaminated estuary, by clarifying the trophic web structure through stable isotope ratios. For this purpose, primary producers (seagrasses and macroalgae), invertebrates (detritivores and benthic predators) and fish were analysed for total and organic mercury and for stable carbon and nitrogen isotopic signatures. Trophic structure was accurately described by δ(15)N, while δ(13)C reflected the carbon source for each species. An increase of mercury levels was observed with trophic level, particularly for organic mercury. Results confirm mercury biomagnification to occur in this estuarine food web, especially in the organic form, both in absolute concentrations and fraction of total mercury load. Age can be considered an important variable in mercury biomagnification studies, and data adjustments to account for the different exposure periods may be necessary for a correct assessment of trophic magnification rates and ecological risk.
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105
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Srikanth K, Pereira E, Duarte AC, Ahmad I. Glutathione and its dependent enzymes' modulatory responses to toxic metals and metalloids in fish--a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:2133-2149. [PMID: 23334549 DOI: 10.1007/s11356-012-1459-y] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 12/27/2012] [Indexed: 06/01/2023]
Abstract
Toxic metals and metalloid are being rapidly added from multiple pathways to aquatic ecosystem and causing severe threats to inhabiting fauna including fish. Being common in all the type of aquatic ecosystems such as freshwater, marine and brackish water fish are the first to get prone to toxic metals and metalloids. In addition to a number of physiological/biochemical alterations, toxic metals and metalloids cause enhanced generation of varied reactive oxygen species (ROS) ultimately leading to a situation called oxidative stress. However, as an important component of antioxidant defence system in fish, the tripeptide glutathione (GSH) directly or indirectly regulates the scavenging of ROS and their reaction products. Additionally, several other GSH-associated enzymes such as GSH reductase (GR, EC 1.6.4.2), GSH peroxidase (EC 1.11.1.9), and GSH sulfotransferase (glutathione-S-transferase (GST), EC 2.5.1.18) cumulatively protect fish against ROS and their reaction products accrued anomalies under toxic metals and metalloids stress conditions. The current review highlights recent research findings on the modulation of GSH, its redox couple (reduced glutathione/oxidised glutathione), and other GSH-related enzymes (GR, glutathione peroxidase, GST) involved in the detoxification of harmful ROS and their reaction products in toxic metals and metalloids-exposed fish.
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106
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Colombani F, Pereira E, Bettaieb J, Gobin L, Cowppli-Bony A, Hoppe S, Coureau G, Picat M, Salamon R, Monnereau A, Savès M. Intérêt des données du registre hospitalier (Enquête permanente cancer) d’un centre régional de lutte contre le cancer pour un registre de cancer en population. Rev Epidemiol Sante Publique 2013; 61:1-9. [DOI: 10.1016/j.respe.2012.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Revised: 03/07/2012] [Accepted: 04/25/2012] [Indexed: 11/17/2022] Open
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107
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Pereira E, Fumeron S, Moraes F. Metric approach for sound propagation in nematic liquid crystals. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:022506. [PMID: 23496534 DOI: 10.1103/physreve.87.022506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 12/14/2012] [Indexed: 06/01/2023]
Abstract
In the eikonal approach, we describe sound propagation near topological defects of nematic liquid crystals as geodesics of a non-Euclidian manifold endowed with an effective metric tensor. The relation between the acoustics of the medium and this geometrical description is given by Fermat's principle. We calculate the ray trajectories and propose a diffraction experiment to retrieve information about the elastic constants.
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108
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Cardoso PG, Grilo TF, Pereira E, Duarte AC, Pardal MA. Mercury bioaccumulation and decontamination kinetics in the edible cockle Cerastoderma edule. CHEMOSPHERE 2013; 90:1854-1859. [PMID: 23141557 DOI: 10.1016/j.chemosphere.2012.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 09/27/2012] [Accepted: 10/05/2012] [Indexed: 06/01/2023]
Abstract
Mercury bioaccumulation and decontamination kinetics in the edible cockle Cerastoderma edule were studied through a mesocosms experiment after a medium-term exposure to the metal. The results revealed that the bivalve presented distinct bioaccumulation kinetics according to the different tissues. While the gills showed a linear accumulation pattern, the digestive gland and the entire organism presented a saturation model, with higher accumulation during the first 7d of exposure and lower during the rest of the time. In addition, the bioaccumulation rate was not proportional to the Hg concentration, since the organisms under lower contamination presented higher bioconcentration factors than the ones under higher contamination. Gills were the tissues with higher mercury accumulation capability. Concerning the decontamination phase, C. edule lost approximately 80% of the mercury after 24h exposure in clean seawater. Nevertheless, never reached the original condition, showing in the final (20 d detox), Hg levels (>0.5 ppm) higher than those allowed by the legislation regulating human food consumption. This represents a matter of concern for Human health.
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109
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Guerra C, Rendeiro P, Pereira E, Rosmaninho A, Nogueira R, Pereira S, Tavares P. Microarray for skeletal dysplasias: thanatophoric dysplasia diagnosed in utero using microarray technology. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2013; 41:95-96. [PMID: 22744731 DOI: 10.1002/uog.11217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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110
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Reis A, Coelho J, Rodrigues S, Rocha R, Davidson C, Duarte A, Pereira E. Development and validation of a simple thermo-desorption technique for mercury speciation in soils and sediments. Talanta 2012; 99:363-8. [DOI: 10.1016/j.talanta.2012.05.065] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 05/24/2012] [Accepted: 05/29/2012] [Indexed: 11/29/2022]
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111
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Pereira E, Castelhano M. On-Line Contributions of Peripheral Information to Visual Search in Scenes: Further Explorations of Object Content and Scene Context. J Vis 2012. [DOI: 10.1167/12.9.740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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112
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Ahmad I, Coelho JP, Mohmood I, Anjum NA, Pacheco M, Santos MA, Duarte AC, Pereira E. Mercury contaminated systems under recovery can represent an increased risk to seafood human consumers – A paradox depicted in bivalves’ body burdens. Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.01.047] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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113
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Plaha P, Chari A, Haslam N, Pereira E, Rogers A, Korevaar T, Karavitaki N, Grossman A, Cudlip S. Pituitary Tumor Surgery in the Elderly: Perioperative Complications and Long-Term Outcome. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1314047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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114
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Ahmad I, Mohmood I, Coelho JP, Pacheco M, Santos MA, Duarte AC, Pereira E. Role of non-enzymatic antioxidants on the bivalves' adaptation to environmental mercury: Organ-specificities and age effect in Scrobicularia plana inhabiting a contaminated lagoon. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2012; 163:218-225. [PMID: 22265760 DOI: 10.1016/j.envpol.2011.12.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 12/02/2011] [Accepted: 12/13/2011] [Indexed: 05/31/2023]
Abstract
This study aimed to investigate the role of non-enzymatic antioxidants on adaptive skills over time in the bivalve Scrobicularia plana environmentally exposed to mercury. Inter-age (2(+), 3(+), 4(+), 5(+) year old) and organ-specific (gills, digestive gland) approaches were applied in bivalves collected from moderately and highly contaminated sites at Ria de Aveiro (Portugal). S. plana's adaptive skills were dependent on the contamination extent; under moderate contamination scenario, the intervention of the different antioxidants took place harmoniously, evidencing an adjustment capacity increasing with the age. Under higher contamination degree, S. plana failed to cope with mercury threat, showing an age-dependent deterioration of the defense abilities. In organ-specific approach, the differences were particularly evident for thiol-compounds, since only gills displayed the potential to respond to moderate levels by increasing non-protein thiols and total glutathione. Under high contamination degree, both organs were unable to increase thiol-compounds, which were compensated by the ascorbic acid elevation.
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Sáenz J, Páez A, Alarcón R, Casas J, Sánchez A, Pereira E, Cáncer E, Álvarez M, Rendón D, Durán M. [Obesity as risk factor for lithiasic recurrence]. Actas Urol Esp 2012; 36:228-33. [PMID: 21955561 DOI: 10.1016/j.acuro.2011.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 07/25/2011] [Indexed: 10/28/2022]
Abstract
OBJECTIVES Obese patients may have special characteristics in the urinary stones formed, as the body mass index (BMI) may also be a predictive factor in lithiasic recurrence. We aim to evaluate and compare the lithiasic characteristics according to the different BMI categories, also considering the likelihood of lithiasic recurrence in presence of age and gender covariables. MATERIAL AND METHODS Retrospective, cross-sectional analysis on 346 lithiasic patients, 96 (27.7%) had low-normal weight, 151 (43.6%) overweight, and 99 (28.6%) obesity. The Chi-square and ANOVA tests were used. Survival analysis for the calculation of likelihood of lithiasic recurrence (yes/no) was made based on time on 158 patients in whom complete resolution of the initial stone was achieved by the Kaplan Meier method. Comparisons between the different categories of BMI were made using the log-Rank, Breslow and Tarone-Ware tests. Multivariate analysis was also made with the Cox regression model, introducing the covariables of age and gender. RESULTS A significant growing linear tendency has been demonstrated between multiplicity and BMI (p=0.03). The variables size and composition did not show significant differences between the groups. Median follow-up of 158 patients included in the survival analysis was 1866 days (95% CI 1602.5-2129.5). Eighteen (11.4%) of them recurred, without finding significant differences between groups: 4 low-normal weight (9.8%), 10 overweight (14.1%) and 4 obese (8.7%). The multivariate analysis also did not show a significant influence of the BMI on lithiasic recurrence (p=0.86; HR =1.06; 95% CI: 0.56-2.03). CONCLUSION A significant influence of BMI was shown on lithiasic multiplicity on diagnosis, although not on lithiasic recurrence based on time. It seems to be necessary to carry out studies in larger samples to calculate the true influence of BMI on lithiasic recurrence.
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Sáenz J, Páez A, Alarcón R, Casas J, Sánchez A, Pereira E, Cáncer E, Álvarez M, Rendón D, Durán M. Obesity as risk factor for lithiasic recurrence. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.acuroe.2012.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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117
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Caetano AL, Gonçalves F, Sousa JP, Cachada A, Pereira E, Duarte AC, Ferreira da Silva E, Pereira R. Characterization and validation of a Portuguese natural reference soil to be used as substrate for ecotoxicological purposes. ACTA ACUST UNITED AC 2012; 14:925-36. [DOI: 10.1039/c2em10827e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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118
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Figueira P, Lopes CB, Daniel-da-Silva AL, Pereira E, Duarte AC, Trindade T. Removal of mercury (II) by dithiocarbamate surface functionalized magnetite particles: application to synthetic and natural spiked waters. WATER RESEARCH 2011; 45:5773-5784. [PMID: 21924455 DOI: 10.1016/j.watres.2011.08.057] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 07/22/2011] [Accepted: 08/27/2011] [Indexed: 05/31/2023]
Abstract
In order to take advantage of the high affinity between mercury and sulphur, magnetite (Fe(3)O(4)) particles functionalized with dithiocarbamate groups (CS(2)(-)), were synthesized to be used as a new type of sorbent to remove Hg (II) from synthetic and natural spiked waters. The effectiveness of this type of sorbent was studied, and its potential as cleanup agent for contaminated waters was assessed. Batch stirred tank experiments were carried out by contacting a volume of solution with known amounts of functionalized Fe(3)O(4) particles, in order to study the effect of sorbent dose, salinity, and the kinetics and the equilibrium of this unit operation. A complete Hg (II) removal (ca. 99.8%) was attained with 6 mg/L of magnetic particles for an initial metal concentration of 50 μg/L. It was confirmed that highly complex matrices, such as seawater (ca. 99%) and river water (ca. 97%), do not affect the removal capacity of the functionalized magnetic particles. Concerning isotherms, no significant differences were observed between two- and three-parameter models (P = 0.05%); however, Sips isotherm provided the lowest values of SS and S(x/y), predicting a maximum sorption capacity of 206 mg/g, in the range of experimental conditions under study. The solid loadings measured in this essay surmount the majority of the values found in literature for other type of sorbents.
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119
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Pereira E, Castelhano M. Guidance during Visual Search in Real-World Scenes: Scene Context vs. Object Content. J Vis 2011. [DOI: 10.1167/11.11.1320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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120
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Rothstein M, Pereira E, Baker S, Arora R, Bhatkar V, Colombo J. Parasympathetic involvement in sleep medicine, cardiovascular implications. Auton Neurosci 2011. [DOI: 10.1016/j.autneu.2011.05.227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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121
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Rocha L, Rodrigues SM, Lopes I, Soares AMVM, Duarte AC, Pereira E. The water-soluble fraction of potentially toxic elements in contaminated soils: relationships between ecotoxicity, solubility and geochemical reactivity. CHEMOSPHERE 2011; 84:1495-1505. [PMID: 21546051 DOI: 10.1016/j.chemosphere.2011.04.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 03/31/2011] [Accepted: 04/07/2011] [Indexed: 05/30/2023]
Abstract
To better understand the impacts posed by soil contamination to aquatic ecosystems it is crucial to characterise the links between ecotoxicity, chemical availability and geochemical reactivity of potentially toxic elements (PTE's) in soils. We evaluated the adverse effects of water extracts obtained from soils contaminated by chemical industry and mining, using a test battery including organisms from different trophic levels (bacteria, algae and daphnids). These tests provided a quick assessment of the ecotoxicity of soils with respect to possible adverse effects on aquatic organisms although the ecotoxicological responses could be related to the solubility of PTE's only to a limited extent. The analysis of results of bioassays together with the chemical characterisation of water extracts provided additional relevant insight into the role of conductivity, pH, Al, Fe, and Mn of soil extracts on toxicity to organisms. Furthermore, an important conclusion of this study was that the toxicity of extracts to the aquatic organisms could also be related to the soil properties (pH, Org C and Fe(ox)) and to the reactivity of PTE's in soils which in fact control the soluble fraction of the contaminants. The combined assessment of ecotoxicity in water fractions, solubility and geochemical reactivity of PTE's in soils provided a more comprehensive understanding of the bioavailability of inorganic contaminants than ecotoxicological or chemical studies alone and can therefore be most useful for environmental risks assessment of contaminated soils.
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122
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Rothstein M, Pereira E, Baker S, Arora R, Bhatkar V, Colombo J. Parasympathetic and sympathetic involvement in obstructive sleep apnea. Auton Neurosci 2011. [DOI: 10.1016/j.autneu.2011.05.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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123
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Pereira E, Bombarda S, Chimara E, Galesi V, Ferrazoli L. SP1-97 Nontuberculous mycobacteria: comparative analysis with tuberculosis notification in Sao Paulo State (SPS). Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976n.74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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124
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Rocha LS, Pereira E, Duarte AC, Pinheiro JP. Performance of Ex Situ Bismuth Film Rotating Disk Electrode in Trace Metal Analysis by Stripping Chronopotentiometry: Definition of the Depletion Regime and Optimization of Experimental Parameters. ELECTROANAL 2011. [DOI: 10.1002/elan.201100119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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125
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Marques B, Lillebø AI, Pereira E, Duarte AC. Mercury cycling and sequestration in salt marshes sediments: an ecosystem service provided by Juncus maritimus and Scirpus maritimus. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2011; 159:1869-1876. [PMID: 21514707 DOI: 10.1016/j.envpol.2011.03.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Revised: 03/17/2011] [Accepted: 03/23/2011] [Indexed: 05/30/2023]
Abstract
In this study two time scales were looked at: a yearlong study was completed, and a 180-day decay experiment was done. Juncus maritimus and Scirpus maritimus have different life cycles, and this seems to have implications in the Hg-contaminated salt marsh sediment chemical environment, namely Eh and pH. In addition, the belowground biomass decomposition rates were faster for J. maritimus, as well as the biomass turnover rates. Results show that all these species-specific factors have implications in the mercury dynamics and sequestration. Meaning that J. maritimus belowground biomass has a sequestration capacity for mercury per square metre approximately 4-5 times higher than S. maritimus, i.e., in S. maritimus colonized areas Hg is more extensively exchange between belowground biomass and the rhizosediment. In conclusion, J. maritimus seems to provide a comparatively higher ecosystem service through phytostabilization (Hg complexation in the rhizosediment) and through phytoaccumulation (Hg sequestration in the belowground biomass).
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