Consulta: subjectFacets:"Trace elements"
Registros recuperados: 78
Data/hora: 11/06/2024 04:37:31

GEOCHEMICAL BACKGROUND IN AN OXISOL
Provedor de dados: 70
Autores: Cembranel,Adir S.; Sampaio,Silvio C.; Remor,Marcelo B.; Gotardo,Jackeline T.; Rosa,Pábolla M. Dalla.
ABSTRACT Geochemical background establishment is indispensable to determine the actual state of contamination of soils and sediments. However, no scientific consensus exists regarding the methodology for determining these values. In this context, this study aimed to establish the geochemical background in an Oxisol (Rhodic Hapludox) by means of an integrated method that uses direct and indirect soil analyses to identify the most appropriate calculation methodology. Soil samples were collected in a permanent preservation area of the Cascavel River watershed, PR, Brazil. The elements Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, and Zn present in soil samples were quantified by flame atomic absorption spectrometry. The use of a permanent preservation area is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Heavy metals; Sediment; Soil.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300565

MERCURY IN THE SEDIMENT OF THE UPPER PARNAÍBA RIVER
Provedor de dados: 70
Autores: Remor,Marcelo B.; Sampaio,Silvio C.; Rosa,Danielle M.; Model,Kathleen J.; Paloschi,Cristiane L.; Conceição,Fagner G. da.
ABSTRACT The contamination of aquatic environments with chemical trace elements can be evaluated by their accumulation in sediments of the water body. Studies on mercury require the use of exclusive extraction techniques that have relatively high costs when compared to the analysis of other trace elements. This study was conducted aiming at determining the mercury concentration in sediments of the Upper Parnaíba River basin, located in a region of agricultural expansion between the states of Piauí and Maranhão. The sediment was collected at 12 sites in the basin. After drying, the quantification of total mercury was performed by the Zeeman atomic absorption spectrometry coupled to a pyrolysis reactor. Mercury concentrations in sediments of the Parnaíba...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Agricultural frontier; Heavy metal.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000500760

Soja: molibdênio e cobalto.
Provedor de dados: 14
Autores: SFREDO, G. J.; OLIVEIRA, M. C. N. de.
Introdução: nitrogênio, molibdênio, cobalto. Resultados da Embrapa Soja: safra de 1992/93, 1993/94, 1994/95. Resultados da Fundação Mato Grosso do Sul. Considerações gerais: Embrapa Soja, Fundação Mato Grosso do Sul. Recomendações.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Soja; Fertilidade do solo; Microelemento; Fixação de nitrogênio; Soybeans; Soil fertility; Nitrogen fixation; Trace elements.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/859439

Correcao da deficiencia de micronutrientes em solos de cerrado para a cultura da ervilha.
Provedor de dados: 14
Autores: GALRAO, E. Z.
bitstream/item/116696/1/rectec-07.pdf
Tipo: Recomendação Técnica (INFOTECA-E)
Palavras-chave: Correcao do solo; Grain.; Cerrado; Ervilha; Grão; Microelemento; Pisum Sativum; Solo; Zinco.; Peas; Trace elements; Soil; Soil amendments; Zinc.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546782

Correcao de deficiencia de micronutrientes em solos de cerrados para a cultura do girassol.
Provedor de dados: 14
Autores: GALRAO, E. Z.
bitstream/item/116699/1/rectec-09.pdf
Tipo: Recomendação Técnica (INFOTECA-E)
Palavras-chave: Correcao do solo; Sunflowers.; Cerrado; Helianthus Annuus; Girassol; Microelemento; Solo; Zinco.; Trace elements; Soil; Soil amendments; Zinc.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546784

Os micronutrientes silicatados na cafeicultura.
Provedor de dados: 14
Autores: YNAMA, R.; PRIMAVESI, O. M. A. S. P. R.
bitstream/item/120073/1/digitalizar0009.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Micronutrientes; Café; Solo; Trace elements; Soil.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/43244

Efeito da inundação sobre as propriedades de um glei pouco húmico de várzea do rio Guamá, nos municípios de Belém e Santa Isabel, PA.
Provedor de dados: 14
Autores: FERREIRA, W. de A.; MODESTO JUNIOR, M. de S.; BOTELHO, S. M.; MASCARENHAS, R. E. B.
bitstream/item/48875/1/Boletim-Pesquisa-207-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Solo de varzea; Rio Guamá; Santa Isabel; Belém; Pará; Brasil; Flooded land; Chemicophysical properties; Fertility.; Cobre; Fertilidade; Fósforo; Manganês; Macroelemento; Ph; Propriedade Físico-Química; Zinco.; Amazonia; Manganese; Phosphorus; Trace elements; Zinc.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376638

Fertilizantes.
Provedor de dados: 14
Autores: MESSIAS, A. S.; SILVA, D. J.; FREIRE, F. J.; SILVA, M. C. L. da.
Nitrogenados; Fosfatados; Potassicos; Organicos; Micronutrientes; Fertilizantes simples e formulacoes comerciais; Epocas e modos de aplicacao de fertilizantes.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Micronutriente; Adubo; Corretivo; Fertilizante; Fósforo; Matéria Orgânica; Nitrogênio; Potássio; Solo; Fertilizer application; Nitrogen; Organic matter; Phosphorus; Potassium; Trace elements; Soil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132544

A base do controle da ferrugem do cafeeiro.
Provedor de dados: 14
Autores: YNAMA, R.; PRIMAVESI, O.
Macro-nutrientes; Micro-nutrientes; Material orgânico; Ferrugem do cafeerio.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Produção de café; Production.; Café; Fertilidade do Solo; Solo.; Coffea; Fertilizers; Trace elements; Soil.
Ano: 1973
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/43242

Does trace element composition of bivalve shells record utra-high frequency environmental variations?
Provedor de dados: 5
Autores: Poitevin, Pierre; Chauvaud, Laurent; Pecheyran, Christophe; Lazure, Pascal; Jolivet, Aurélie; Thebault, Julien.
Saint-Pierre and Miquelon (SPM) is a small archipelago where instrumental measures based on water column velocity and temperature profiles compiled comprehensive evidence for strong near-diurnal (25.8h) current and bottom temperature oscillations (up to 11.5 °C) which is possibly the largest ever observed — at any frequency — on a stratified mid-latitude continental shelf. The main objective of our study was to identify if Placopecten magellanicus can record on its shell these high frequency environmental variations. To this end, we have tried to identify proxies for water temperature and food availability through development of a new ultra-high resolution LA-ICPMS analyses method capable of resolving shell surface elemental composition with a 10 μm...
Tipo: Text
Palavras-chave: Ultra-high resolution LA-ICPMS; Placopecten magellanicus; Shell chemistry; Trace elements; Environmental change; Bivalve; Environmental proxies; North Atlantic; Saint-Pierre and Miquelon; Coastal trapped wave.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00612/72400/71345.pdf

Trace Element Determinations in Fe-Mn Oxides by High Resolution ICP-MS after Tm Addition
Provedor de dados: 5
Autores: Charles, Claire; Barrat, Jean-alix; Pelleter, Ewan.
In order to propose an optimal analytical procedure specific to ferromanganese (Fe-Mn) oxides, we investigated different modes of data acquisition using inductively coupled plasma mass spectrometry (ICP-MS). The results of trace element and Rare Earth Element (REE) determination in eight Fe-Mn nodules and crusts (FeMn-1, GSMC-1, GSMC-2, GSMC-3, GSPN-2, GSPN-3, NOD-A-1 and NOD-P-1) are presented here. The analytical procedure involves chemical dissolution of the Fe-Mn oxides and addition of a thulium (Tm) spike. The correction of measured values from potential isobaric interferences was investigated using both corrections based on mono-elemental solutions, and data acquisition in the high-resolution mode. The obtained results show that the high-resolution...
Tipo: Text
Palavras-chave: ICP-MS; Fe-Mn oxides; Trace elements; Rare earth elements; High-resolution; Tm spike.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00692/80377/83498.pdf

Multi-Element Determination of Trace Elements in Natural Water Reference Materials by ICP-SFMS after Tm Addition and Iron Co-precipitation
Provedor de dados: 5
Autores: Bayon, Germain; Birot, Dominique; Bollinger, Claire; Barrat, Jean Alix.
We report on an improved method for determining trace element abundances in seawater and other natural waters. The analytical procedure involves co-precipitation on iron hydroxides after addition of a Tm spike, and measurement by inductively coupled plasma-sector field mass spectrometry (ICP-SFMS). The validity of the method was assessed through a series of co-precipitation experiments, using ultra-diluted solutions of a certified rock reference material (BIR-1). Results obtained for four natural water reference materials (NASS-5, CASS-4, SLEW-3, SLRS-4) are in agreement with published working values for rare earth elements, yttrium, vanadium and, when available, for hafnium, zirconium, thorium and scandium. A set of proposed values with uncertainties...
Tipo: Text
Palavras-chave: Seawater; Reference material; ICP-MS; Trace elements; Rare earth elements; Eau de mer; Materiau de reference; ICP-MS; Elements traces; Terres Rares.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00031/14189/18000.pdf

Extensive larval dispersal and restricted movement of juveniles on the nursery grounds of sole in the Southern North Sea
Provedor de dados: 5
Autores: Delerue-ricard, Sophie; Darnaude, Audrey M.; Raeymaekers, Joost A.m.; Dundas, Siv Hjorth; Skadal, Julie; Volckaert, Filip A.m.; Geffen, Audrey J.
Connectivity between spawning and nursery grounds influences the colonization, replenishment and resilience of populations of marine organisms. Connectivity rate, measured as the exchange of individuals between spawning and nursery grounds, is therefore a crucial determinant of stock size. However, connectivity of early-life stages is hard to explore due to sampling limitations and insufficient knowledge on potential larval sources. Here we present new insights into pre- and post-settlement dispersal of the common sole (Solea solea L.) at a spatial scale of 5–500 km in the Southern North Sea. Patterns at a scale of &lt;100 km were considered local, whereas patterns further than 100 km were considered regional. Multi-elemental signatures of the otolith edge...
Tipo: Text
Palavras-chave: Connectivity; Early-life history; North Sea; Otolith elemental composition; Trace elements; Solea solea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00594/70601/68794.pdf

Plankton as biological pump for contaminants in marine ecosystems: a transmediterranean approach (Merite Hippocampe cruise, april-mai 2019)
Provedor de dados: 5
Autores: Carlotti, François; Tronczynski, Jacek; Tedetti, Marc; Pagano, Marc; Garnier, Cédric.
Recent research on the bioaccumulation of organic and trace element contaminants along trophic food webs suggests that plankton plays a central role as a 'biological pump' for pollutants. The MERITE-HIPPOCAMPE project (oceanographic cruise in April- May 2019) aims at studying the interactions between plankton and contaminants (metallic, organic plastics) at atmosphere/water/biota interfaces via a North-South trans-Mediterranean approach in contrasted areas (primary production, fishing zones, ecoregions, polluted bays). The target contaminants are on the lists of priority pollutants and substances of Regional Conventions (OSPAR) and EU directives (WFD, MSF). The expected results are to provide a better understanding of the transfer processes of contaminants...
Tipo: Text
Palavras-chave: Trace elements; Pcb; Pah; Plankton; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00599/71132/69447.pdf

A new contribution to the Late Quaternary tephrostratigraphy of the Mediterranean: Aegean Sea core LC21
Provedor de dados: 5
Autores: Satow, C.; Tomlinson, E. L.; Grant, K. M.; Albert, P. G.; Smith, V. C.; Manning, C. J.; Ottolini, L.; Wulf, S.; Rohling, E. J.; Lowe, J. J.; Blockley, S. P. E.; Menzies, M. A.
Tephra layers preserved in marine sediments can contribute to the reconstruction of volcanic histories and potentially act as stratigraphic isochrons to link together environmental records. Recent developments in the detection of volcanic ash (tephra) at levels where none is macroscopically visible (so-called ‘crypto-tephra’) have greatly enhanced the potential of tephrostratigraphy for synchronising environmental and archaeological records by expanding the areas over which tephras are found. In this paper, crypto-tephra extraction techniques allow the recovery of 8 non-visible tephra layers to add to the 9 visible layers in a marine sediment core (LC21) from the SE Aegean Sea to form the longest, single core record of volcanic activity in the Aegean Sea....
Tipo: Text
Palavras-chave: Tephra; Trace elements; Santorini; Campanian Ignimbrite; Pantelleria; Kos; Yali; Aegean sea; Mediterranean.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00294/40498/39433.pdf

Multiscale chemical heterogeneities beneath the eastern Southwest Indian Ridge (52°E–68°E): Trace element compositions of along‐axis dredged peridotites
Provedor de dados: 5
Autores: Seyler, Monique; Brunelli, Daniele; Toplis, Michael J.; Mevel, Catherine.
The Southwest Indian Ridge is characterized by frequent outcrops of mantle rocks in a very slow spreading context. In situ measurements of trace element concentrations in pyroxenes of these rocks, and associated petrogenetic modeling, are reported. Overall, the measured compositions cover the whole range typically observed for abyssal peridotites. The greatest subkilometer-scale compositional variability is observed in the region east of the Melville fracture zone. The best explanation for the observed variability is given by concurrent melting and migration of melts strongly enriched in the most incompatible rare earth elements, such as those produced by a garnet-bearing source, or by refertilization with mixed garnet- and spinel-derived partially...
Tipo: Text
Palavras-chave: Indian Ocean; Abyssal peridotite; Mantle heterogeneities; Trace elements; Ultraslow spreading ridge.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00140/25134/23244.pdf

Distribution de 40 elements a l''etat de traces dans les suspensions de la Seine. Utilisation du lanthane pour etudier les processus sedimentaires dans l''estuaire et dans la baie
Provedor de dados: 5
Autores: Guegueniat, P; Boust, D; Hemon, G; Phillipot, J; Lagarde, G; Heitz, C.
This work has three objectives in view: (1) the establishment of spatial distribution of 40 trace elements in suspensions and sediments of the Seine estuary and bay; (2) the research of non-reactive geochemical tracers of fluvial deposits; and (3) the illustration of sediment dynamics influence on distribution of elements during the particulate period.
Tipo: Text
Palavras-chave: Sediment chemistry; River discharge; Geographical distribution; Estuarine dynamics; Sediment dynamics; Suspended particulate matter; Trace elements.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1297.pdf

The GEOTRACES Intermediate Data Product 2014
Provedor de dados: 5
Autores: Mawji, Edward; Schlitzer, Reiner; Dodas, Elena Masferrer; Abadie, Cyril; Abouchami, Wafa; Anderson, Robert F.; Baars, Oliver; Bakker, Karel; Baskaran, Mark; Bates, Nicholas R.; Bluhm, Katrin; Bowie, Andrew; Bown, Johann; Boye, Marie; Boyle, Edward A.; Branellec, Pierre; Bruland, Kenneth W.; Brzezinski, Mark A.; Bucciarelli, Eva; Buesseler, Ken; Butler, Edward; Cai, Pinghe; Cardinal, Damien; Casciotti, Karen; Chaves, Joaquin; Cheng, Hai; Chever, Fanny; Church, Thomas M.; Colman, Albert S.; Conway, Tim M.; Croot, Peter L.; Cutter, Gregory A.; De Baar, Hein J. W.; De Souza, Gregory F.; Dehairs, Frank; Deng, Feifei; Huong Thi Dieu,; Dulaquais, Gabriel; Echegoyen-sanz, Yolanda; Edwards, R. Lawrence; Fahrbach, Eberhard; Fitzsimmons, Jessica; Fleisher, Martin; Frank, Martin; Friedrich, Jana; Fripiat, Francois; Galer, Stephen J. G.; Gamo, Toshitaka; Solsona, Ester Garcia; Gerringa, Loes J. A.; Godoy, Jose Marcus; Gonzalez, Santiago; Grossteffan, Emilie; Hatta, Mariko; Hayes, Christopher T.; Heller, Maija Iris; Henderson, Gideon; Huang, Kuo-fang; Jeandel, Catherine; Jenkins, William J.; John, Seth; Kenna, Timothy C.; Klunder, Maarten; Kretschmer, Sven; Kumamoto, Yuichiro; Laan, Patrick; Labatut, Marie; Lacan, Francois; Lam, Phoebe J.; Lannuzel, Delphine; Le Moigne, Frederique; Lechtenfeld, Oliver J.; Lohan, Maeve C.; Lu, Yanbin; Masque, Pere; Mcclain, Charles R.; Measures, Christopher; Middag, Rob; Moffett, James; Navidad, Alicia; Nishioka, Jun; Noble, Abigail; Obata, Hajime; Ohnemus, Daniel C.; Owens, Stephanie; Planchon, Frederic; Pradoux, Catherine; Puigcorbe, Viena; Quay, Paul; Radic, Amandine; Rehkaemper, Mark; Remenyi, Tomas; Rijkenberg, Micha J. A.; Rintoul, Stephen; Robinson, Laura F.; Roeske, Tobias; Rosenberg, Mark; Van Der Loeff, Michiel Rutgers; Ryabenko, Evgenia; Saito, Mak A.; Roshan, Saeed; Salt, Lesley; Sarthou, Geraldine; Schauer, Ursula; Scott, Peter; Sedwick, Peter N.; Sha, Lijuan; Shiller, Alan M.; Sigman, Daniel M.; Smethie, William; Smith, Geoffrey J.; Sohrin, Yoshiki; Speich, Sabrina; Stichel, Torben; Stutsman, Johnny; Swift, James H.; Tagliabue, Alessandro; Thomas, Alexander; Tsunogai, Urumu; Twining, Benjamin S.; Van Aken, Hendrik M.; Van Heuven, Steven; Van Ooijen, Jan; Van Weerlee, Evaline; Venchiarutti, Celia; Voelker, Antje H. L.; Wake, Bronwyn; Warner, Mark J.; Woodward, E. Malcolm S.; Wu, Jingfeng; Wyatt, Neil; Yoshikawa, Hisayuki; Zheng, Xin-yuan; Xue, Zichen; Zieringer, Moritz; Zimmer, Louise A.
The GEOTRACES Intermediate Data Product 2014 (IDP2014) is the first publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2013. It consists of two parts: (1) a compilation of digital data for more than 200 trace elements and isotopes (TEls) as well as classical hydrographic parameters, and (2) the eGEOTRACES Electronic Atlas providing a strongly inter-linked on-line atlas including more than 300 section plots and 90 animated 3D scenes. The IDP2014 covers the Atlantic, Arctic, and Indian oceans, exhibiting highest data density in the Atlantic. The TEI data in the IDP2014 are quality controlled by careful assessment of intercalibration results and multi-laboratory data...
Tipo: Text
Palavras-chave: GEOTRACES; Trace elements; Isotopes; Electronic atlas.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00308/41910/41190.pdf

Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity
Provedor de dados: 5
Autores: Huang, Enqing.
This thesis aims to investigate variations of the last glacial and deglacial Atlantic Ocean circulation, with emphasize on the Atlantic deepwater ventilation rate during the Last Glacial Maximum (LGM). The highlights of the thesis are as the followings: (1) the modern frontal zone between the North Atlantic and the South Atlantic central waters off NW Africa shifted to the south during the last glacial and deglacial time periods. (2) The radiocarbon-based circulation age of the deep Atlantic (&gt; 1500 m) was estimated to be less than 400 years during the LGM, which was equal to or less than its pre-bomb value. Therefore, the LGM deep Atlantic was inferred to be well ventilated. (3) The abyssal Atlantic (below 2500 m) prior to the LGM was more depleted in...
Tipo: Text
Palavras-chave: Climate change; Ocean circulation; Atlantic Ocean; Glacial; Deglacial; Thermocline; Radiocarbon; Global carbon cycle; Foraminifera; Carbonate; Trace elements; Deep ocean ventilation rates.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00493/60446/63891.pdf

Trace element cartography of Globigerinoides ruber shells using particle-induced X-ray emission
Provedor de dados: 5
Autores: Gehlen, M; Bassinot, F; Beck, L; Khodja, H.
Micro particle-induced X-ray emission (PIXE) is a nondestructive elemental analysis technique that can be used to map the distribution of elements with a spatial resolution of +/-4 mum(2) and a penetration depth of +/-2 mum in a calcite matrix. To test its potential to improve our understanding of trace element distribution in foraminifera shells, we mapped the Mg distribution across individual chambers of the planktonic species Globigerinoides ruber. G. ruber shells were picked from equatorial Atlantic surface sediments (Sierra Leone Rise). They ranged from well-preserved to heavily dissolved tests. The mapping of trace elements across test chambers made it possible to discriminate between variability inherent to the shell material and heterogeneity...
Tipo: Text
Palavras-chave: Foraminifera; Mg/Ca; Dissolution; Trace elements; Instruments and techniques.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00228/33892/32319.pdf

The GEOTRACES Intermediate Data Product 2017
Provedor de dados: 5
Autores: Schlitzer, Reiner; Anderson, Robert F.; Dodas, Elena Masferrer; Lohan, Maeve; Geibere, Walter; Tagliabue, Alessandro; Bowie, Andrew; Jeandel, Catherine; Maldonado, Maria T.; Landing, William M.; Cockwell, Donna; Abadie, Cyril; Abouchami, Wafa; Achterberg, Eric P.; Agather, Alison; Aguliar-islas, Ana; Van Aken, Hendrik M.; Andersen, Morten; Archer, Corey; Auro, Maureen; De Baar, Hein J.; Baars, Oliver; Baker, Alex R.; Bakker, Karel; Basak, Chandranath; Baskaran, Mark; Bates, Nicholas R.; Bauch, Dorothea; Van Beek, Pieter; Behrens, Melanie K.; Black, Erin; Bluhm, Katrin; Bopp, Laurent; Bouman, Heather; Bowman, Katlin; Bown, Johann; Boyd, Philip; Boye, Marie; Boyle, Edward A.; Branellec, Pierre; Bridgestock, Luke; Brissebrat, Guillaume; Browning, Thomas; Bruland, Kenneth W.; Brumsack, Hans-juergen; Brzezinski, Mark; Buck, Clifton S.; Buck, Kristen N.; Buesseler, Ken; Bull, Abby; Butler, Edward; Cai, Pinghe; Camara Mor, Patricia; Cardinal, Damien; Carlson, Craig; Carrasco, Gonzalo; Casacuberta, Nuria; Casciotti, Karen L.; Castrillejo, Maxi; Chamizo, Elena; Chance, Rosie; Charette, Matthew A.; Chaves, Joaquin E.; Cheng, Hai; Chever, Fanny; Christl, Marcus; Church, Thomas M.; Closset, Ivia; Colman, Albert; Conway, Tim M.; Cossa, Daniel; Croot, Peter; Cullen, Jay T.; Cutter, Gregory A.; Daniels, Chris; Dehairs, Frank; Deng, Feifei; Dieu, Huong Thi; Duggan, Brian; Dulaquais, Gabriel; Dumousseaud, Cynthia; Echegoyen-sanz, Yolanda; Edwards, R. Lawrence; Ellwood, Michael; Fahrbach, Eberhard; Fitzsimmons, Jessica N.; Flegal, A. Russell; Fleisher, Martin Q.; Van De Flierdt, Tina; Frank, Martin; Friedrich, Jana; Fripiat, Francois; Froellje, Henning; Galer, Stephen J. G.; Gamo, Toshitaka; Ganeshram, Raja S.; Garcia-orellana, Jordi; Garcia-solsona, Ester; Gault-ringold, Melanie; George, Ejin; Gerringa, Loes J. A.; Gilbert, Melissa; Godoy, Jose M.; Goldstein, Steven L.; Gonzalez, Santiago R.; Grissom, Karen; Hammerschmidt, Chad; Hartman, Alison; Hassler, Christel S.; Hathorne, Ed C.; Hatta, Mariko; Hawco, Nicholas; Hayes, Christopher T.; Heimburger, Lars-eric; Helgoe, Josh; Heller, Maija Iris; Henderson, Gideon M.; Henderson, Paul B.; Van Heuven, Steven; Ho, Peng; Horner, Tristan J.; Hsieh, Yu-te; Huang, Kuo-fang; Humphreys, Matthew P.; Isshiki, Kenji; Jacquot, Jeremy E.; Janssen, David J.; Jenkins, William J.; John, Seth; Jones, Elizabeth M.; Jones, Janice L.; Kadko, David C.; Kayser, Rick; Kenna, Timothy C.; Khondoker, Roulin; Kim, Taejin; Kipp, Lauren; Klar, Jessica K.; Klunder, Maarten; Kretschmer, Sven; Kumamoto, Yuichiro; Laan, Patrick; Labatut, Marie; Lacan, Francois; Lam, Phoebe J.; Lambelet, Myriam; Lamborg, Carl H.; Le Moigne, Frederic A. C.; Le Roy, Emilie; Lechtenfeld, Oliver J.; Lee, Jong-mi; Lherminier, Pascale; Little, Susan; Lopez-lora, Mercedes; Lu, Yanbin; Masque, Pere; Mawji, Edward; Mcclain, Charles R.; Measures, Christopher; Mehic, Sanjin; Barraqueta, Jan-lukas Menzel; Van Der Merwe, Pier; Middag, Rob; Mieruch, Sebastian; Milne, Angela; Minami, Tomoharu; Moffett, James W.; Moncoiffe, Gwenaelle; Moore, Willard S.; Morris, Paul J.; Morton, Peter L.; Nakaguchi, Yuzuru; Nakayama, Noriko; Niedermiller, John; Nishioka, Jun; Nishiuchi, Akira; Noble, Abigail; Obata, Hajime; Ober, Sven; Ohnemus, Daniel C.; Van Ooijen, Jan; O'Sullivan, Jeanette; Owens, Stephanie; Pahnke, Katharina; Paul, Maxence; Pavia, Frank; Pena, Leopoldo D.; Petersh, Brian; Planchon, Frederic; Planquette, Helene; Pradoux, Catherine; Puigcorbe, Viena; Quay, Paul; Queroue, Fabien; Radic, Amandine; Rauschenberg, S.; Rehkamper, Mark; Rember, Robert; Remenyi, Tomas; Resing, Joseph A.; Rickli, Joerg; Rigaud, Sylvain; Rijkenberg, Micha J. A.; Rintoul, Stephen; Robinson, Laura F.; Roca-marti, Montserrat; Rodellas, Valenti; Roeske, Tobias; Rolison, John M.; Rosenberg, Mark; Roshan, Saeed; Van Der Loaff, Michiel M. Rutgers; Ryabenko, Evgenia; Saito, Mak A.; Salt, Lesley A.; Sanial, Virginie; Sarthou, Geraldine; Schallenberg, Christina; Schauer, Ursula; Scher, Howie; Schlosser, Christian; Schnetger, Bernhard; Scott, Peter; Sedwick, Peter N.; Semiletov, Igor; Shelley, Rachel; Sherrell, Robert M.; Shiller, Alan M.; Sigman, Daniel M.; Singh, Sunil Kumar; Slagter, Hans A.; Slater, Emma; Smethie, William M.; Snaith, Helen; Sohrin, Yoshiki; Sohst, Bettina; Sonke, Jeroen E.; Speich, Sabrina; Steinfeldt, Reiner; Stewart, Gillian; Stichel, Torben; Stirling, Claudine H.; Stutsman, Johnny; Swarr, Gretchen J.; Swift, James H.; Thomas, Alexander; Thorne, Kay; Till, Claire P.; Till, Ralph; Townsend, Ashley T.; Townsend, Emily; Tuerena, Robyn; Twining, Benjamin S.; Vance, Derek; Velazquez, Sue; Venchiarutti, Celia; Villa-alfageme, Maria; Vivancos, Sebastian M.; Voelker, Antje H. L.; Wake, Bronwyn; Warner, Mark J.; Watson, Ros; Van Weerlee, Evaline; Weigand, M. Alexandra; Weinstein, Yishai; Weiss, Dominik; Wisotzki, Andreas; Woodward, E. Malcolm S.; Wu, Jingfeng; Wu, Yingzhe; Wuttig, Kathrin; Wyatt, Neil; Xiang, Yang; Xie, Ruifang C.; Xue, Zichen; Yoshikawa, Hisayuki; Zhang, Jing; Zhang, Pu; Zhao, Ye; Zheng, Linjie; Zheng, Xin-yuan; Zieringer, Moritz; Zimmer, Louise A.; Ziveri, Patrizia; Zunino, Patricia; Zurbrick, Cheryl.
The new IDP2017 is a significant improvement over the earlier IDP2014 and roughly doubles the number of included cruises, stations, samples and parameters. The IDP2017 is a truly international product containing data from 326 researchers from 25 countries. The IDP2017 provides data for the Pacific Ocean, and the Mediterranean and Black seas, in addition to Atlantic, Arctic and Indian Oceans that were already represented in the previous data product. For the first time, the IDP2017 contains significant amounts of biogeochemistry data as well as TEI data for aerosols and rain. As before, users can obtain complete IDP2017 data sets as bulk downloads. Alternatively, there is now a customisable online data extraction service that allows data selections by...
Tipo: Text
Palavras-chave: GEOTRACES; Trace elements; Isotopes; Electronic atlas; IDP2017.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00442/55362/56877.pdf

Abrupt changes of temperature and water chemistry in the late Pleistocene and early Holocene Black Sea
Provedor de dados: 5
Autores: Bahr, Andre; Lamy, Frank; Arz, Helge W.; Major, Candace; Kwiecien, Olga; Wefer, Gerold.
[1] New Mg/Ca, Sr/Ca, and published stable oxygen isotope and Sr-87/(86) Sr data obtained on ostracods from gravity cores located on the northwestern Black Sea slope were used to infer changes in the Black Sea hydrology and water chemistry for the period between 30 to 8 ka B. P. ( calibrated radiocarbon years). The period prior to 16.5 ka B. P. was characterized by stable conditions in all records until a distinct drop in delta O-18 values combined with a sharp increase in Sr-87/(86) Sr occurred between 16.5 and 14.8 ka B. P. This event is attributed to an increased runoff from the northern drainage area of the Black Sea between Heinrich Event 1 and the onset of the Bolling warm period. While the Mg/Ca and Sr/Ca records remained rather unaffected by this...
Tipo: Text
Palavras-chave: Black Sea; Ostracods; Trace elements.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00209/31989/30432.pdf

Otoliths imprinting of sole (Solea solea) from the Bay of Biscay: a tool to discriminate individuals from nursery origins?
Provedor de dados: 5
Autores: De Pontual, Helene; Lagardere, Francoise; Troadec, Herve; Batel, Alain; Desaunay, Yves; Koutsikopoulos, Constantin.
Sole nurseries are located in the main bays and estuaries of the Bay of Biscay, where juveniles from the same stock. concentrate and constitute temporarily isolated groups. This context being favourable for elemental analyses of juvenile otoliths this study has been initiated with the aim of obtaining environmental imprints of the main nurseries of origin of juveniles recruiting to the adult stock, and of evaluating the relative contribution of these nurseries to the stock. The objectives were to compare (i) the otolith elemental imprints obtained by sampling juveniles in the Loire and the Gironde nurseries, and (ii) two multi-element analysis techniques: laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and solution-based ICPMS...
Tipo: Text
Palavras-chave: Recruitment; Juvenile; Estuarine nursery; ICPMS; Trace elements; Otolith; Recrutement; Juvénile; Nourricerie estuarienne; ICPMS; Eléments traces; Otolithe.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-537.pdf

Growth and metal uptake of microalgae produced using salt groundwaters from the Bay of Bourgneuf
Provedor de dados: 5
Autores: Gagneux Moreaux, Sindy; Cosson, Richard P.; Bustamante, Paco; Moreau, Christophe.
The Bay of Bourgneuf, France, is a main site of shellfish production. In the marshes along the bay, oyster intensive rearing and fattening need the mass production of microalgae. Salt groundwaters, available in this region, support a large part of this production for aquaculture. Studies carried out by local authorities have brought to the fore the accumulation of lead (Pb) in several samples of algal pastes derived from cultures using salt groundwater. The aim of this study was to compare growth, nutritional value and metal (Cd, Cu, Pb and Zn) uptake of four microalgae grown in two salt groundwaters or in enriched coastal seawater. Cultures of microalgae used in aquaculture (Haslea ostrearia, Phaeodactylum tricornutum, Skeletonema costatum and Tetraselmis...
Tipo: Text
Palavras-chave: Marine microalgae cultivation; Aquaculture; Metals; Growth; Prasinophycea; Bacillariophycea; Diatom; Bioaccumulation; Trace elements; Saline groundwater.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2135.pdf

Geographic, seasonal and ontogenetic variation in cadmium and mercury concentrations in squid (Cephalopoda : Teuthoidea) from UK waters
Provedor de dados: 5
Autores: Pierce, G; Stowasser, G; Hastie, L; Bustamante, Paco.
Cadmium (Cd) and mercury (Hg) levels were measured in the tissue samples of two loliginid (Alloteuthis sp. and Loligo forbesi) and two ommastrephid (Todarodes sagittatus and Todaropsis eblanae) squid species collected from research cruise and fishery (market) samples in UK waters during 2004-05. Concentrations of Cd were generally higher in the ommastrephids, in all tissues except muscle. Hg concentrations were higher in T sagittatus than in the loliginids. In L. forbesi, metal concentrations differed between tissues and also varied in relation to body size, geographic origin, and season. Cd levels decreased with increasing body size. This may be related to a shift in the diet with growth, since small L. forbesi feed on benthic invertebrates that have...
Tipo: Text
Palavras-chave: Risk for human consumption; Bioaccumulation; Trace elements; Heavy metals; Cephalopods.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4356.pdf

Comportement chimique et geochimique des elements a l'état de traces dans l''estuaire de la Seine: Une synthese des resultats
Provedor de dados: 5
Autores: Guegueniat, P.
Five topics are developed in this synthesis: (1) multi elements analysis in geochemistry; (2) iron geochemical behavior; (3) complexing properties of waters; (4) copper behavior in estuarine waters; (5) impact of sediment dynamics on dissolved metals concentration.
Tipo: Text
Palavras-chave: Geographical distribution; Radiochemistry; Brackishwater pollution; Sediment dynamics; Dissolved chemicals; Heavy metals; Geochemistry; Physicochemical properties; Trace elements.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1290.pdf

Trophic ecology influence on metal bioaccumulation in marine fish: Inference from stable isotope and fatty acid analyses
Provedor de dados: 5
Autores: Le Croizier, Gael; Schaal, Gauthier; Gallon, Regis; Fall, Massal; Le Grand, Fabienne; Munaron, Jean-marie; Rouget, Marie-laure; Machu, Eric; Le Loc'H, Francois; Lae, Raymond; De Morais, Luis Tito.
The link between trophic ecology and metal accumulation in marine fish species was investigated through a multi-tracers approach combining fatty acid (FA) and stable isotope (SI) analyses on fish from two contrasted sites on the coast of Senegal, one subjected to anthropogenic metal effluents and another one less impacted. The concentrations of thirteen trace metal elements (As, Cd, Co, Cr, Cu, Fe, Li, Mn, Ni, Pb, Sn, U, and Zn) were measured in fish liver. Individuals from each site were classified into three distinct groups according to their liver FA and muscle SI compositions. Trace element concentrations were tested between groups revealing that bioaccumulation of several metals was clearly dependent on the trophic guild of fish. Furthermore,...
Tipo: Text
Palavras-chave: Trace elements; Biochemical tracers; Diet; Contamination; Senegal; Tropical fish.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00348/45908/45707.pdf

Ocean circulation and climate variability in the western South Atlantic and eastern South America during the last deglaciation
Provedor de dados: 5
Autores: Chiessi, Cristiano Mazur.
The growing impact of human activities on the climate system adds a new dimension of complexity and urgency to climate change research. Human activities may have the potential to push key components of the climate system past critical states into qualitatively different modes of operation, i.e. to exceed a tipping point. This possibility requires additional efforts from the many branches of climate change research in order to improve the accuracy of climate change projections. The examination of past climate records has proven to be a very useful area of climate change research. This thesis tackles two elements of the climate system whose tipping points are currently considered very critical: the Atlantic meridional overturning circulation and South...
Tipo: Text
Palavras-chave: South Atlantic; South America; Last deglaciation; Stable isotopes; Trace elements; Atlantic meridional overturning circulation; South American summer monsoon.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00495/60660/64157.pdf

Comportement chimique et geochimique des elements a l'état de traces dans l'estuaire de la Seine: Synthese des discussions
Provedor de dados: 5
Autores: Guegueniat, P.
In the synthesis of discussions about the chemistry of the Seine Bay, the author after a note on natural references for metal concentrations, speaks about fluorides, nutrients, PCB, and metallic elements. In conclusion some suggestions about pollutants transfer towards ecosystems link, are enumerated.
Tipo: Text
Palavras-chave: PCB; Fluorides; Chemical pollution; Trace metals; Food webs; Bioaccumulation; Biogeochemical cycle; Trace elements.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1303.pdf

New insights into productivity and redox-controlled trace element (Ag, Cd, Re, and Mo) accumulation in a 55 kyr long sediment record from Guaymas Basin, Gulf of California
Provedor de dados: 5
Autores: Chang, Alice S.; Pichevin, Laetitia; Pedersen, Thomas F.; Gray, Victoria; Ganeshram, Raja.
A high-resolution, 55 kyr long record of chalcophile and redox-sensitive trace element accumulation (Ag, Cd, Re, and Mo) from MD02-2515, western Guaymas Basin, is investigated in conjunction with patterns in stratigraphy and productivity. High opal concentrations (~59 wt. %), representing increased diatom production, coincide with laminated sediments and dilute the concentrations of organic carbon (Corg) and metals. A similarity between opal and normalized Corg, Ag, and Cd concentrations suggests delivery to the sediments by diatom export production, while patterns in normalized Re and Mo accumulation suggest a different emplacement mechanism. Although Mo enrichment in organic-rich, laminated sediments typically represents anoxic conditions at other...
Tipo: Text
Palavras-chave: Productivity; Redox; Trace elements; Laminated sediments; Guaymas Basin; Northeast Pacific Ocean.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00294/40566/39461.pdf

The behavior of Al, Mn, Ba, Sr, REE and Th isotopes during in vitro degradation of large marine particles
Provedor de dados: 5
Autores: Arraes-mescoff, R; Roy-barman, M; Coppola, L; Souhaut, M; Tachikawa, K; Jeandel, C; Sempere, R; Yoro, C.
m) concentrations of Al, Sr, Ba, Mn, Rare Earth Elements (REE) and Th isotopes were determined over time. We obtain percentages of dissolution in agreement with the general knowledge about the solubility of these tracers: Th approximate to Al &lt; Heavy REE &lt; Light REE &lt; Mn &lt; Ba &lt; Sr. For Mn and Ce, precipitation/adsorption occurs at the end of the experiment probably due to their oxidation as insoluble oxides. Particulate residence time of the tracers ranged from less than 1 day to 10-14 days. During the experiment, biological activity has a control on the dissolution process through the remineralization of particulate organic carbon, In the 30 m experiment, the observed dissolution of aragonite indicates that the pH of the incubation solution...
Tipo: Text
Palavras-chave: Marine particles; Dissolution; Trace elements; Thorium isotopes; Western Mediterranean Sea.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/00300/41128/40316.pdf

Living (stained) deep-sea foraminifera from the Sea of Marmara: a preliminary study
Provedor de dados: 5
Autores: Fontanier, Christophe; Dissard, D.; Ruffine, Livio; Mamo, B.; Ponzevera, Emmanuel; Pelleter, Ewan; Baudin, F.; Roubi, Angelique; Cheron, Sandrine; Boissier, Audrey; Gayet, Nicolas; Bermell-fleury, S.; Pitel, M.; Guyader, Vivien; Lesongeur, Francoise; Savignac, F.
In this preliminary study, we investigate living (stained) foraminifera from the Sea of Marmara. We focus on the faunal composition and geochemical signatures (trace elements, carbon and oxygen stable isotopes) in foraminiferal tests at two deep-sea sites (329 and ~1240 m depth respectively). Documented by ROV observations and sampling, both study areas are heterogeneous (including bacterial mats and carbonate concretions), proximal to cold seeps and consist of dysoxic bottom water (O2&lt;20 µmol/L). The prevailing dysoxia at both study areas restricts foraminiferal diversity to very low values (S&lt;9, H’&lt;0.97). Stress-tolerant species Bolivina vadescens and Globobulimina affinis dominate living faunas at both sites. The highest foraminiferal standing...
Tipo: Text
Palavras-chave: Living (stained) benthic foraminifera; Sea of Marmara; Extreme ecosystems; Trace elements; Stable isotopes.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00416/52774/53646.pdf

A microbiological and biogeochemical investigation of the cold seep tubeworm Escarpia southwardae (Annelida: Siboglinidae): Symbiosis and trace element composition of the tube
Provedor de dados: 5
Autores: Duperron, Sebastien; Gaudron, Sylvie M.; Lemaitre, Nolwenn; Bayon, Germain.
Tubeworms within the annelid family Siboglinidae rely on sulfur-oxidizing autotrophic bacterial symbionts for their nutrition, and are among the dominant metazoans occurring at deep-sea hydrocarbon seeps. Contrary to their relatives from hydrothermal vents, sulfide uptake for symbionts occurs within the anoxic subsurface sediment, in the posterior ‘root’ region of the animal. This study reports on an integrated microbiological and geochemical investigation of the cold seep tubeworm Escarpia southwardae collected at the Regab pockmark (Gulf of Guinea). Our aim was to further constrain the links between the animal and its symbiotic bacteria, and their environment. We show that E. southwardae harbors abundant sulfur-oxidizing bacterial symbionts in its...
Tipo: Text
Palavras-chave: Sulfur-oxidizing bacteria; RTCA; Trace elements; RubisCO; Symbiosis.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00191/30251/28683.pdf

Trace element systematics in cold seep carbonates and associated lipid compounds
Provedor de dados: 5
Autores: Wang, Xudong; Bayon, Germain; Kim, Jung-hyun; Lee, Dong-hun; Kim, Dahae; Guéguen, Bleuenn; Rouget, Marie-laure; Barrat, Jean-alix; Toffin, Laurent; Feng, Dong.
Seeping of methane-rich fluids at submarine cold seeps drives intense microbial activity and precipitation of authigenic carbonates. Some trace elements play an important role in the biogeochemical processes operating at cold seeps, especially as specific enzymatic co-factors related to methanogenesis and the anaerobic oxidation of methane (AOM). However, it is unclear whether microbial trace metal utilization can be traced by the geochemical composition of seep carbonates. In this study, we analyzed a series of authigenic carbonate samples recovered from various seep settings worldwide and report for the first time trace element concentrations for total lipid fractions, combined with biomarker analyses and determination of elemental abundances in...
Tipo: Text
Palavras-chave: Seep carbonate; Lipid compounds; Trace elements; Tungsten; Nickel; Cobalt; Molybdenum.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62311/66562.pdf

Inter-specific and ontogenic differences in delta C-13 and delta N-15 values and Hg and Cd concentrations in cephalopods
Provedor de dados: 5
Autores: Chouvelon, Tiphaine; Spitz, Jerome; Cherel, Y.; Caurant, Florence; Sirmel, R.; Mendez-fernandez, P.; Bustamante, Paco.
Chemical tracers (e. g. stable isotopes or trace metals) are increasingly used to study trophic ecology and feeding habits of marine organisms and various factors can affect their values. The aim of the present study was to provide information on ontogenic effects on stable carbon and nitrogen values (delta C-13 and delta N-15) and on cadmium (Cd) and mercury (Hg) concentrations in 5 cephalopod species from the Bay of Biscay (North-East Atlantic Ocean). To this end, individuals belonging to 3 species showing the widest range of sizes were analysed for muscle delta C-13 and delta N-15 values and muscle Hg, and digestive gland Cd concentrations. Results showed that stable isotope ratios allowed discrimination of specific feeding strategies during...
Tipo: Text
Palavras-chave: Stable isotopes; Metals; Trace elements; Ontogenesis; Prey; Ecological tracer; Northeastern Atlantic.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00166/27761/25938.pdf

Trace of the Kerguelen mantle plume: Evidence from seamounts between the Kerguelen Archipelago and Heard Island, Indian Ocean
Provedor de dados: 5
Autores: Weis, D; Frey, Fa; Schlich, R; Schaming, M; Montigny, R; Damasceno, D; Mattielli, N; Nicolaysen, Ke; Scoates, Js.
The gravity and bathymetric highs on the Kerguelen Plateau in the southern Indian Ocean between the Kerguelen Archipelago and Heard Island are seamounts formed of Miocene alkalic basalts similar to those found on the islands. Dredging during the Kerimis survey cruise recovered &gt;1 ton of mostly basaltic rocks. One of the dredges (D6) yielded a large volume of in situ alkalic picritic pillow basalts, the first picritic lavas recovered that are related to the Kerguelen plume. K-Ar and Ar-40-Ar-39 ages are between 18 and 21 Ma for all but one sample, and these ages are only slightly younger than the main phase of volcanism on the archipelago. The dredged lavas form three distinct groups based on chemical and isotopic compositions. Incompatible element...
Tipo: Text
Palavras-chave: Kerguelen; Trace elements; Isotopes; Mantle plume; Hot spot track; Picrites; Geochemistry; 1025 Geochemistry : Composition of the mantle; 1040 Geochemistry : Isotopic composition/chemistry; 1065 Geochemistry : Trace elements (3670).
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00223/33407/31856.pdf

Determination of rare earth elements and other trace elements (Y, Mn, Co, Cr) in seawater using Tm addition and Mg(OH)(2) co-precipitation
Provedor de dados: 5
Autores: Freslon, Nicolas; Bayon, Germain; Birot, Dominique; Bollinger, Claire; Barrat, Jean-alix.
This paper reports on a novel procedure for determining trace element abundances (REE and Y, Cr, Mn, Co) in seawater by inductively coupled plasma sector field mass spectrometry (ICP-SFMS). The procedure uses a combination of pre-concentration using co-precipitation onto magnesium hydroxides and addition of thulium spike. The validity of the method was assessed onto 25 ml volumes of certified reference materials (NASS- and CASS-4) and in house seawater standard. Procedural blanks were determined by applying the same procedure to aliquots of seawater previously depleted in trace elements by successive Mg(OH)(2) co-precipitations, yielding estimated contributions to the studied samples better than 1.1% for all elements, with the exception of Cr (&lt;3.3%)...
Tipo: Text
Palavras-chave: Trace elements; Rare earth elements (REE); Seawater; Mg(OH)(2) co-precipitation; ICP-MS; Thulium.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00041/15220/15855.pdf

Accumulation of nine metals and one metalloid in the tropical scallop Comptopallium radula from coral reefs in New Caledonia
Provedor de dados: 5
Autores: Metian, M.; Bustamante, Paco; Hedouin, L.; Warnau, M.
Uptake of waterborne Cd, Co, Mn and Zn was determined in laboratory experiments using radiotracer techniques (Cd-109, Co-57, Mn-54 and Zn-65). Labelled Zn was mainly accumulated in the digestive gland (65%) and Co in kidneys (81%); Cd and Mn were similarly distributed in digestive gland and gills. In a complementary field study, Ag, As, Cd, Co, Cr, Cu, Fe, Mn, Ni, and Zn were analysed in scallops collected at two stations showing different contamination levels. Digestive gland and kidneys displayed the highest concentrations. Ag, As, Cd, and Fe differed in soft tissues from the two stations, suggesting that Comptopallium radula could be a valuable local biomonitor species for these elements. Low Mn and Zn concentrations found in kidneys suggest that their...
Tipo: Text
Palavras-chave: Bioindicator species; Risk assessment; Pectinidae; Radiotracers; Arsenic; Trace elements; Tropical environment.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6953.pdf

Olivines in main-group pallasites: magma-ocean cumulates or partial melting residues?
Provedor de dados: 5
Autores: Barrat, Jean-alix; Ferrière, L.
Main-group pallasites (MGPs) are meteorites mainly composed of Fe-Ni metal and olivines, the latter being considered as one of the largest sampling of extraterrestrial mantle material available for study on Earth. We analysed the rare earth element (REE) concentrations of olivines from six MGPs to understand better the processes of formation of their parent mantle. All the investigated samples display very low REE abundances, and enrichments in both light REEs and heavy REEs. We interpret the light REE enrichments as a fingerprint of terrestrial contamination. The least contaminated olivines have higher heavy REE enrichments than those inferred for olivines directly crystallised in a magma ocean. Such enrichments in heavy REEs are possible if the mantle of...
Tipo: Text
Palavras-chave: Pallasite; Early solar system; Trace elements; Rare earth elements; Differentiation.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00686/79770/82569.pdf

Aérosols côtiers dans le nord de la Manche
Provedor de dados: 5
Autores: Flament, P; Lepretre, A; Noel, S; Auger, Y.
Dix-huit prélèvements d'aérosols ont été effectués en Manche Nord, soit en bordure de mer, soit à quelques milles au large, à l'aide d'un impacteur à cascade (5 étages). L'ensemble des données (concentrations de 8 éléments répartis en 6 classes granulométriques successives) est exploité par analyse factorielle des correspondances. Celle-ci permet de mettre en évidence de larges déformations dans les spectres granulométriques pour les éléments traceurs marin et terrestre (Na et Al). En opposition, les métaux résultant d'activité anthropique (Fe, Pb, Zn, Mn), ont des comportements beaucoup plus typés. Parmi ceux-ci, la présence du manganèse sur le site paraît être indépendante de celle des autres métaux et imputable à une seule source. Pb, Fe, Zn et cuivre...
Tipo: Text
Palavras-chave: Aérosols; Éléments-traces; Analyse par correspondance; Distribution granulométrique; Littoral; Aerosols; Trace elements; Correspondence analysis; Size distribution; Coastal.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00110/22082/19723.pdf

Geochemical and sedimentology of core sediments and the influence of human activities: Qusier, Safaga and Hurghada Harbors, Red Sea Coast, Egypt
Provedor de dados: 20
Autores: Mohamed, A.W.
The grain size distribution and arameters, major and trace elements, carbonate, total phosphorus, organic carbon and total organic matter has been assessed for core sediments collected in the intertidal area of Qusier, Safaga and Hurghada harbors in July 2002. Mud is the dominant fraction in almost all samples of Qusier core and some samples of Safaga and Hurghada cores. The reason for the high mud content of all Qusier core samples and some samples of Safaga and Hurghada cores is due to the terrigenous flux of wadies, phosphate deposits, landfill and dredging in these areas. Metals concentrations in the core sediments vary between sites within a wide range for Cu, Zn, Pb, V, Ni and Cd. Concentration of metals in the sediments at the top of cores is the...
Tipo: Journal Contribution
Palavras-chave: Trace elements; Carbonate; Anthropogenic impacts; Remediation Environments Grain size Marine environment Marine pollution Organic matter Marine environment Organic matter Environment http://aims.fao.org/aos/agrovoc/c_4610 http://aims.fao.org/aos/agrovoc/c_5387 http://aims.fao.org/aos/agrovoc/c_2593.
Ano: 2005
URL: http://hdl.handle.net/1834/1248

The pollution of marine sediments by trace elements in the coastal region of Togo caused by dumping of cadmium-rich phosphorite tailing into the sea
Provedor de dados: 20
Autores: Gnandi, K.; Tobschall, H.J.
The marine coastal sediments irom Togo have been analysed for the trace elements Cd, Cr, Cu, Ni, Pb, Sr, V, Zn and Zr to ascertain the geoecological impact of dumping of phosphorite tailings into the sea. Trace element concentrations ranged from 2-44 ppm for Cd, 22-184 ppm for Cu, 19-281 ppm for Ni, 22-176 ppm for Pb, 179- 643 ppm for Sr, 38-329 ppm for V, 60-632 ppm for Zn and 18-8928 ppm for Zr. Regional distribution L of trace elements in the marine environment indicates that the concentrations of Cr, Cu, Ni, Pb, V, Sr and Zn increase seawards and aloug the coastal a line outwards of the tailing outfall, whereas Cd and Zr showed reversed spatial patterns. Sorting and transport of phosphorite particles by coastal currents are the main factors controlling...
Tipo: Journal Contribution
Palavras-chave: Marine pollution; Trace elements; Phosphorite; Trace elements; Http://aims.fao.org/aos/agrovoc/c_7834.
Ano: 1999
URL: http://hdl.handle.net/1834/1400

The pollution of marine sediments by trance elements in the coastal region of Togo caused by dumping of cadmium-rich phosphorite tailing into the sea
Provedor de dados: 20
Autores: Tobschall, H.J.; Gnandi, K.
The marine coastal sediments from Togo have been analysed for the trace elements Cd, Cr, Cu, Ni, Pb, Sr, V, Zn and Zr to ascertain the geo-ecological impact of dumping of phosphorite tailings into the sea. Trace element concentrations ranged from 2-44 ppm for Cd, 22-184 ppm for Cu, 19-281 ppm for Ni, 22-176 ppm for Pb, 179-643 ppm for Sr, 38-329 ppm for V, 60-632 ppm for Zn and 18-8928 ppm for Zr. Regional distribution of trace elements in the marine environment indicates that the concentrations of Cr, Cu, Ni, Pb, V, Sr and Zn increase seawards and along the coastal line outwards of the tailing outfall, whereas Cd and Zr showed reversed spatial patterns. Sorting and transport of phosphorite particles by coastal currents are the main factors controlling the...
Tipo: Journal Contribution
Palavras-chave: Marine pollution; Trace elements; Trace elements; Http://aims.fao.org/aos/agrovoc/c_7834.
Ano: 1999
URL: http://hdl.handle.net/1834/1465

Effect of ecological and biological factors on the uptake and concentration of trace elements by aquatic organisms at Edku lake
Provedor de dados: 20
Autores: Abbas, M.M.; Shakweer, L.
The effect of temperature, pH and trace elements concentration in the ambient water on the uptake and accumulation of Cu, Zn, Ni and Pb in various organs of fish and parts of aquatic plants of Edku Lake were studied. It was found that higher water temperature and lower pH during summer increased the rates of trace metals uptake by the most common fish species Oreochromis niloticus. The concentrations of Cu, Zn, and Ni in the various organs of fish were affected by the concentrations of these elements in the water. Cu, Zn, Ni and Pb attained higher concentrations in the roots of Eichormia crassipes if compared with their concentrations in the other parts of this aquatic plant. Sex of fish can be considered as an important factor affecting the accumulation...
Tipo: Journal Contribution
Palavras-chave: Trace elements; Fish; Aquatic plants; Pollution Accumulation Environments Lake fisheries Lakes Lake fisheries Lakes Environment http://aims.fao.org/aos/agrovoc/c_4159 http://aims.fao.org/aos/agrovoc/c_4160 http://aims.fao.org/aos/agrovoc/c_2593.
Ano: 2005
URL: http://hdl.handle.net/1834/1249

Evaluation de la contamination chimique par les metaux traces (cd, pb, hg et zn) du zooplancton et de la sardinelle (Sardinella aurita) dans le golfe de tunis
Provedor de dados: 20
Autores: Chouba, L.; Ennouri, R.; Kraiem, M.M.
La présente étude a pour but de déterminer l’organotropisme de quatre métaux traces (Cd, Pb, Hg et Zn) ainsi que leurs concentrations dans le zooplancton et dans trois organes (muscle, foie et branchies) de la sardinelle (Sardinella aurita) provenant du golfe de Tunis.  Les résultats ont montré que les concentrations moyennes des quatre métaux dosés (Cd, Pb, Hg et Zn) sont plus élevées dans la sardinelle que dans le zooplancton. Ceci est dû à la bioamplification de ces éléments dans la sardinelle qui occupe un niveau trophique élevé de la chaîne alimentaire marine.  Pour le Pb, le Hg et le Zn,  les teneurs le plus élevées ont été enregistrées dans les branchies de la sardinelle, alors que  le Cd est concentré davantage au niveau du foie. Les concentrations...
Tipo: Journal Contribution
Palavras-chave: Bioaccumulation; Marine pollution; Pollution indicators; Trace elements; Zooplankton; Sardinella aurita; Marine environment; Http://aims.fao.org/aos/agrovoc/c_39038; Http://aims.fao.org/aos/agrovoc/c_4610.
Ano: 2008
URL: http://hdl.handle.net/1834/4155

Manifestación de metales pesados en la ensenada Cerro Guayabo bahía de Guantánamo Cuba
Provedor de dados: 20
Autores: Cabrera, I.; Arencibia, G.; Alonso, J. A.; Figueredo, M.; Díaz, N.; Águila, A.
Los problemas de contaminación por elementos trazas y mayores en los sedimentos superficiales de la bahía de Guantánamo constituyen una preocupación de las autoridades locales de la cuenca Guantánamo – Guaso; por tal razón nos dimos a la tarea de estudiar la calidad de las aguas de la ensenada Cerro Guayabo, perteneciente a dicha cuenca, siendo esta una de las más impactadas por el desarrollo salinero en los últimos años. El estudio incluyó una revisión de todos los trabajos de caracterización realizados por otras instituciones en años anteriores, que nos permitió establecer la necesidad de evaluar con profundidad los sedimentos de la zona, pues hasta la fecha el comportamiento de la calidad de las aguas no aportó contaminación significativa. Los...
Tipo: Preprint
Palavras-chave: Trace elements; Trace elements; Http://aims.fao.org/aos/agrovoc/c_7834.
Ano: 2010
URL: http://hdl.handle.net/1834/3556

Evaluation de la contamination chimique par les métaux traces (Cd, Pb, Hg et Zn) du zooplancton et de la sardinelle &lt;Sardinella aurita&gt;dans le golfe de tunis
Provedor de dados: 20
Autores: Ennouri, R.; Chouba, L.; Kraeim, M.M.
La présente étude a pour but de déterminer l’organotropisme de quatre métaux traces (Cd, Pb, Hg et Zn) ainsi que leurs concentrations dans le zooplancton et dans trois organes (muscle, foie et branchies) de la sardinelle (Sardinella aurita) provenant du golfe de Tunis.  Les résultats ont montré que les concentrations moyennes des quatre métaux dosés (Cd, Pb, Hg et Zn) sont plus élevées dans la sardinelle que dans le zooplancton. Ceci est dû à la bioamplification de ces éléments dans la sardinelle qui occupe un niveau trophique élevé de la chaîne alimentaire marine.  Pour le Pb, le Hg et le Zn,  les teneurs le plus élevées ont été enregistrées dans les branchies de la sardinelle, alors que  le Cd est concentré davantage au niveau du foie. Les concentrations...
Tipo: Journal Contribution
Palavras-chave: Bioaccumulation; Marine pollution; Pollution indicators; Trace elements; Zooplankton; Sardinella aurita; Bioaccumulation; Zooplankton; Sardinella aurita; Trace elements; Http://aims.fao.org/aos/agrovoc/c_32389; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_39038; Http://aims.fao.org/aos/agrovoc/c_7834.
Ano: 2008
URL: http://hdl.handle.net/1834/3707

High fluorine and other associated trace elements in waters from the south of the Pampean plain
Provedor de dados: 85
Autores: Espósito,ME; Sequeira,ME; Paoloni,JD; Blanco,MC; Amiotti,N.
We investigated the levels of F and its relationship with As, B and V in ground and surface waters of the southern Pampas, where cases of dental and skeletal fluorosis, and arsenic in hair and urine samples have been detected in the rural population. Eating vegetables and cereals grown in irrigated areas with excessive fluoride may increase the risk of fluorosis due to the addition of the extra F contributed from other sources such as drinking water. Moreover, if these elements exceed the tolerance of crops produce toxicity and, like salinity, they decrease the potential crop yield. Within an area of 2300 km², 81 samples were taken from surface and groundwaters to determine F, As, B and V. Fluoride was detected in 86% of the sampled groundwaters, and in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fluoride; Trace elements; As; B; V; Surface and groundwaters; Toxicity; Irrigation; Crops and human consumption.
Ano: 2013
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100006

Metal-Resistant Rhizobacteria Change Soluble-Exchangeable Fraction in Multi-Metal-Contaminated Soil Samples
Provedor de dados: 90
Autores: Boechat,Cácio Luiz; Quadros,Patricia Dörr de; Giovanella,Patrícia; Brito,Ana Clecia Campos; Carlos,Filipe Selau; Sá,Enilson Luiz Saccol de; Camargo,Flávio Anastácio de Oliveira.
ABSTRACT There is a complex interaction between various components of the soil ecosystem, including microbial biomass and soil chemical contaminants such as heavy metals and radionuclides, which may greatly affect the efficiency of bioremediation techniques. The aim of this study was to investigate microbial capacity to change pH, changes in the metal soluble-exchangeable fraction, and effects of initial heavy metal contents on soil samples in microbial solubilization/immobilization capacity. The soil samples used in this study were collected at a known metal-contaminated site. Three highly metal-resistant bacteria were isolated from rhizosphere soil samples collected on weed species identified as Senecio brasiliensis, Senecio leptolobus, and Baccharis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Bioremediation technology; Rhizosphere; Environmental contamination.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100514

CHROMIUM IN SOIL ORGANIC MATTER AND COWPEA AFTER FOUR CONSECUTIVE ANNUAL APPLICATIONS OF COMPOSTED TANNERY SLUDGE
Provedor de dados: 90
Autores: Oliveira,Mara Lucia Jacinto; Araujo,Ademir Sérgio Ferreira de; Melo,Wanderley José de.
Tannery sludge contains high concentrations of inorganic elements, such as chromium (Cr), which may lead to environmental pollution and affect human health The behavior of Cr in organic matter fractions and in the growth of cowpea (Vigna unguiculata L.) was studied in a sandy soil after four consecutive annual applications of composted tannery sludge (CTS). Over a four-year period, CTS was applied on permanent plots (2 × 5 m) and incorporated in the soil (0-20 cm) at the rates of 0, 2.5, 5.0, 10.0, and 20.0 Mg ha-1 (dry weight basis). These treatments were replicated four times in a randomized block design. In the fourth year, cowpea was planted and grown for 50 days, at which time we analyzed the Cr concentrations in the soil, in the fulvic acid, humic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil contamination; Humic substances; Solid residue; Heavy metals; Plant growth; Trace elements.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100297

Assessing the Content of Micronutrients in Soils and Sugarcane in Different Pedogeological Contexts of Northeastern Brazil
Provedor de dados: 90
Autores: Silva,Rita de Cássia Ferreira da; Silva,Fernando Bruno Vieira da; Biondi,Caroline Miranda; Nascimento,Clístenes Williams Araújo do; Oliveira,Emídio Cantídio Almeida de.
ABSTRACT Micronutrient research for sugarcane in northeastern Brazil is scarce and most works on this issue date back to the 70’s and 80’s. The objectives of this study were to assess the available and reserve pools of Fe, Mn, Cu, and Zn in soils cultivated with sugarcane under three geological contexts in northeastern Brazil as well as to diagnose the micronutrient nutritional status of sugarcane grown on these areas in order to identify pedogeological conditions in which micronutrient deficiencies are likely. Results showed that the soils cultivated with sugarcane in the states of Paraíba and Pernambuco posed available and reserve contents of micronutrients related to the parent materials and soil textural classes. The reserve contents of Fe, Mn, Zn, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil fertility; Trace elements; Plant nutrition; Critical levels.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100522

Heavy metals in soils and plants in mango orchards in Petrolina, Pernambuco, Brazil
Provedor de dados: 90
Autores: Silva,João Paulo Siqueira da; Nascimento,Clístenes Williams Araújo do; Biondi,Caroline Miranda; Cunha,Karina Patrícia Vieira da.
The monitoring of heavy metal concentrations in areas under intensive agriculture is essential for the agricultural sustainability and food safety. This paper evaluates the total contents of heavy metals in soils and mango trees in orchards of different ages (6, 7, 8, 9, 10, 11, 14, 16, 17, 19, and 26 years) in Petrolina, Pernambuco, Brazil. Soil samples were taken from the layers 0-20 cm and 20-40 cm, and mango leaves were collected in the growth stage. Areas of native vegetation (Caatinga) adjacent to the cultivated areas were used for comparison. The total concentrations of heavy metals (Cu, Cr, Fe, Zn, Mn, Ni, and Pb) were determined in soils and leaves. In general, mango cultivation led to Cu and Zn accumulation in the soil surface and to a reduction...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Agricultural inputs; Guiding values; Contamination.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400028

Rare Earth Element Concentrations in Brazilian Benchmark Soils
Provedor de dados: 90
Autores: Silva,Ygor Jacques Agra Bezerra da; Nascimento,Clístenes Williams Araújo do; Silva,Yuri Jacques Agra Bezerra da; Biondi,Caroline Miranda; Silva,Cinthia Maria Cordeiro Atanázio Cruz.
ABSTRACT: Studies regarding background concentrations of rare earth elements (REEs) are scarce and have mainly focused on a limited number of soil types from the northern hemisphere. The aim of this study was to determine REE concentrations in thirty-five benchmark soils of Brazil. Composite soil samples were taken from areas under native vegetation or with minimal anthropogenic influence. Concentrations of La, Ce, Pr, Nd, Sm, Eu, Gd, Yb, Lu, Dy, Er, Ho, Tb, Tm, Y, Sc, and Fe were determined by ICP-OES using a cyclonic spray chamber/nebulizer system after microwave acid digestion. Results were assessed by descriptive statistics, Pearson correlation, and principal component analysis (PCA). Regression analyses among Fe, organic carbon, and REEs were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lanthanides; Scandium; Yttrium; Metals; Trace elements.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100548

Evaluation of sample preparation methods and optimization of nickel determination in vegetable tissues
Provedor de dados: 90
Autores: Salazar,Rodrigo Fernando dos Santos; Alcântara,Marco Aurélio Kondracki de; Izário Filho,Hélcio José.
Nickel, although essential to plants, may be toxic to plants and animals. It is mainly assimilated by food ingestion. However, information about the average levels of elements (including Ni) in edible vegetables from different regions is still scarce in Brazil. The objectives of this study were to: (a) evaluate and optimize a method for preparation of vegetable tissue samples for Ni determination; (b) optimize the analytical procedures for determination by Flame Atomic Absorption Spectrometry (FAAS) and by Electrothermal Atomic Absorption (ETAAS) in vegetable samples and (c) determine the Ni concentration in vegetables consumed in the cities of Lorena and Taubaté in the Vale do Paraíba, State of São Paulo, Brazil. By means of the analytical technique for...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Trace elements; Atomic absorption spectrometry; Calcination; Wet digestion; Environmental pollution.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000100022

Mineralogy and Concentration of Potentially Toxic Elements in Soils of the São Francisco Sedimentary Basin
Provedor de dados: 90
Autores: Ferreira,Edilene Pereira; Coelho,Ricardo Marques; Valladares,Gustavo Souza; Dias,Laura Milani da Silva; Assis,Ana Carolina Cunha de; Silva,Rafael Cipriano da; Azevedo,Antonio Carlos de; Abreu,Cleide Aparecida de.
ABSTRACT Lithological and geomorphological variations determine formation of soils with different mineralogical constitutions and can influence the distribution of potentially toxic elements (PTE). The aim of this study was to determine the contents of PTE and mineralogical assemblages along soil profiles of different classes and parent materials and to investigate the association among these factors in the São Francisco sedimentary basin in the northern part of the state of Minas Gerais (Brazil). Eight soil pedons of different classes that developed from different parent materials (limestone, siltstone, phyllite, alluvial-colluvial sediments, detrital cover, and rhythmite) were studied in two lithotoposequences. Soil morphological, particle-size, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parent material; Pedogenesis; Soil minerals; Trace elements.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100519

Forms and accumulation of copper and zinc in a sandy typic hapludalf soil after long-term application of pig slurry and deep litter
Provedor de dados: 90
Autores: Tiecher,Tadeu Luis; Ceretta,Carlos Alberto; Comin,Jucinei José; Girotto,Eduardo; Miotto,Alcione; Moraes,Marcel Pires de; Benedet,Lucas; Ferreira,Paulo Ademar Avelar; Lorenzi,Cledimar Rogério; Couto,Rafael da Rosa; Brunetto,Gustavo.
Successive applications of pig slurry and pig deep litter may lead to an accumulation of copper (Cu) and zinc (Zn) fractions in the soil profile. The objective of this study was to evaluate the Cu and Zn forms and accumulation in a Sandy Typic Hapludalf soil after long-term application of pig slurry and deep litter. In March 2010, eight years after initiating an experiment in Braço do Norte, Santa Catarina (SC), Brazil, on a Sandy Typic Hapludalf soil, soil samples were collected from the 0-2.5, 2.5-5.0, 5-10 and 10-15 cm layers in treatments consisting of no manure application (control) and with applications of pig slurry and deep litter at two levels: the single and double rate of N requirement for maize and black oat succession. The soil was dried,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manure; Trace elements; Chemical fractionation; Environmental contamination.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300028

Replication of an ivg protocol to estimate bioaccessible arsenic in materials from a gold mining area in Brazil
Provedor de dados: 90
Autores: Ono,Fábio Benedito; Guilherme,Luiz Roberto Guimarães; Mendes,Leandro Antunes; Carvalho,Geila Santos.
Tests for bioaccessibility are useful in human health risk assessment. No research data with the objective of determining bioaccessible arsenic (As) in areas affected by gold mining and smelting activities have been published so far in Brazil. Samples were collected from four areas: a private natural land reserve of Cerrado; mine tailings; overburden; and refuse from gold smelting of a mining company in Paracatu, Minas Gerais. The total, bioaccessible and Mehlich-1-extractable As levels were determined. Based on the reproducibility and the accuracy/precision of the in vitro gastrointestinal (IVG) determination method of bioaccessible As in the reference material NIST 2710, it was concluded that this procedure is adequate to determine bioaccessible As in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; In vitro tests; Environmental pollution.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400029

Mineralogical Evolution of Magnetic Rhodic Oxisols under Different Lithological Influences in Brazil
Provedor de dados: 90
Autores: Silva Filho,Luiz Aníbal; Ker,João Carlos; Fontes,Maurício Paulo Ferreira; Camêlo,Danilo de Lima; Corrêa,Marcelo Metri; Cavalcante,Luis Carlos Duarte; Guimarães,Luciano de Moura.
ABSTRACT Ferrimagnetic Fe-oxides are important soil components, which are present in most of the agricultural soils of Brazil. Distinction, origin, and assessment of the influence of these minerals on magnetism and geochemistry is a challenge for mineralogists. This study aimed to characterize mineralogically Fe-rich Rhodic Oxisols ( Latossolos Vermelhos ) originating from several mafic rocks in Brazil, and assess the implications on their magnetic and geochemical properties. We present results on magnetic measurements, chemical dissolutions, X-ray diffractometry, Rietveld refinement, Raman, and Mössbauer spectroscopies of Fe-rich Rhodic Oxisols originating from several mafic rocks. They show that magnetite is inherited from the parent material, and its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnetite; Maghemite; Trace elements; Mafic rocks; Raman spectroscopy.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100411

Background and Reference Values of Metals in Soils from Paraíba State, Brazil
Provedor de dados: 90
Autores: Almeida Júnior,Agenor Bezerra de; Nascimento,Clístenes Williams Araújo do; Biondi,Caroline Miranda; Souza,Adailson Pereira de; Barros,Felipe Martins do Rêgo.
ABSTRACT Soil contamination by heavy metals threatens ecosystems and human health. Environmental monitoring bodies need reference values for these contaminants to assess the impacts of anthropogenic activities on soil contamination. Quality reference values (QRVs) reflect the natural concentrations of heavy metals in soils without anthropic interference and must be regionally established. The aim of this study was to determine the natural concentrations and quality reference values for the metals Ag, Ba, Cd, Co, Cu, Cr, Mo, Ni, Pb, Sb and Zn in soils of Paraíba state, Brazil. Soil samples were collected from 94 locations across the state in areas of native vegetation or with minimal anthropic interference. The quality reference values (QRVs) were (mg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geochemistry; Soil pollution; Micronutrients; Trace elements.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100509

Mineralogy, magnetic susceptibility and geochemistry of Fe-rich Oxisols developed from several parent materials
Provedor de dados: 63
Autores: Camêlo,Danilo de Lima; Ker,João Carlos; Fontes,Maurício Paulo Ferreira; Costa,Antonio Carlos Saraiva da; Corrêa,Marcelo Metri; Leopold,Matthias.
ABSTRACT: Fe-rich Oxisols on mafic rocks in Brazil generally have high magnetic susceptibility with high contents of some trace elements. These are taxonomically similar soils; however, differences in magnetic and geochemical properties may affect agricultural or environmental usability and subsequent management. This study investigated the pedogenesis of Fe-rich Oxisols from various parent materials and evaluated the lithogenetic influence on magnetic susceptibility and trace elements contents. Soil samples were collected from Bw horizons in 13 Rhodic Oxisols and a Typic Oxisol developed from several parent materials in Minas Gerais State, Brazil. Soils were analyzed by X-ray diffractometry (XRD) and magnetometry. Soil chemical analyses consisted of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnetic soils; Iron oxides; Ferrimagnetic minerals; Trace elements; Mafic rocks.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000500410

Heavy metals extractability in a soil amended with sewage sludge
Provedor de dados: 63
Autores: Marchi,Giuliano; Guilherme,Luiz Roberto Guimarães; Chang,Andrew C.; Nascimento,Clístenes Williams Araújo do.
Few investigations have been carried out about the comparison of desorption rate and amount of heavy metals extracted successively by organic acid mixtures mimicking the rhizosphere and routine extractants in sewage sludge-amended soils. Extractions of Zn, Cd, Ni, Cr, and Cu were performed in samples of a sewage sludge-amended soil using seven extractants: four organic acid mixtures and three routine extractants (DTPA, Mehlich-I, and ammonium acetate). Results from single pass extractions, in which the extractable metal contents were determined by simply extracting the soil a single time, as well as from 15 successive extractions, in which the solid residues of the first extraction was successively extracted 14 additional times, of heavy metals were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oxisol; Extraction rate; Trace elements.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000500009

การจัดการธาตุอาหารเสริมที่เหมาะสมสำหรับพันธุ์ข้าวเจ๊กเชย
Provedor de dados: 106
Autores: Nittaya Ruensuk; Pranom Mongkonbunjong; Wassana Inthalaeng.
Tipo: Collection
Palavras-chave: Rice; Jek Cheuy; Trace elements; ข้าว; พันธุ์เจ็กเชย; ธาตุอาหารเสริม; การจัดการธาตุอาหาร; องค์ประกอบผลผลิต; ผลผลิต.
Ano: 2007
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5086

Synergy between cadmium and zinc in bean plants cultivated in multi contaminated soils
Provedor de dados: 1
Autores: Almeida, Lorena Gabriela; Silva, Dayane Meireles da; Jorge, Adelcio de Paula; Souza, Kamila Rezende Dázio de; Guilherme, Luiz Roberto Guimarães; Alves, José Donizeti.
Agricultural species are subjected to a variety of biotic and abiotic stresses, which are the main limitations to crop production. In this context, contamination by trace elements is characterized as an abiotic stress that represents an environmental problem. Due to the physical and chemical similarities between cadmium and zinc, these elements may interact in the environment and may cause antagonistic or synergistic effects. In this way, physiological mechanisms to exclude, detoxify or compartmentalize trace elements that are in excess are crucial for plant survival when exposed to high concentrations of these elements. In this way, the aim of this study was to understand the physiological responses of Phaseolus vulgaris plants subjected to increasing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Antioxidante enzymes; ROS; Photosynthesis; Synergism. Fisiologia Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35829

Synergy between cadmium and zinc in bean plants cultivated in multi contaminated soils
Provedor de dados: 1
Autores: Almeida, Lorena Gabriela; Silva, Dayane Meireles da; Jorge, Adelcio de Paula; Souza, Kamila Rezende Dázio de; Guilherme, Luiz Roberto Guimarães; Alves, José Donizeti.
Agricultural species are subjected to a variety of biotic and abiotic stresses, which are the main limitations to crop production. In this context, contamination by trace elements is characterized as an abiotic stress that represents an environmental problem. Due to the physical and chemical similarities between cadmium and zinc, these elements may interact in the environment and may cause antagonistic or synergistic effects. In this way, physiological mechanisms to exclude, detoxify or compartmentalize trace elements that are in excess are crucial for plant survival when exposed to high concentrations of these elements. In this way, the aim of this study was to understand the physiological responses of Phaseolus vulgaris plants subjected to increasing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Antioxidante enzymes; ROS; Photosynthesis; Synergism.; Fisiologia Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35829

Unveiling neotropical serpentine flora: a list of Brazilian tree species in an iron saturated environment in Bom Sucesso, Minas Gerais
Provedor de dados: 3
Autores: Guimarães, Aretha Franklin; Querido, Luciano Carramaschi de Alagão; Coelho, Polyanne Aparecida; Santos, Paola Ferreira; Santos, Rubens Manoel dos.
Serpentine soils are those holding at least of 70% iron-magnesium compounds, which make life intolerable for many species. Although plant's adaptation to environmental toughness is widely studied in tropics, virtually nothing is known about Brazilian serpentine flora. Our aim was to bring up and characterize the serpentine flora in Bom Sucesso, Minas Gerais state, Brazil. We performed expeditions utilizing rapid survey sampling method to identify the arboreal compound in the area. Plants within circumference at breast high (CBH) up to 15,7 cm were included in our study. A specialist identified all the individuals to species level. We found 246 species located in 59 botanical families. Fabaceae, Myrtaceae and Melastomataceae were the most representative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ultramafic vegetation; Trace elements; Heavy metals; Serpentine soil.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/44594

Nutritional Requirements for Growth of Agaricus brasiliensis - doi: 10.4025/actascibiolsci.v33i1.7010
Provedor de dados: 3
Autores: Gaspar Júnior, Pascoal José; Centro Universitário de Formiga - UNIFOR-MG; Tomizawa, Márcia Mayumi; Universidade Federal de Lavras; Schwan, Rosane Freitas; Universidade Federal de Lavras; Rinker, Danny Lee; University of Guelph; Dias, Eustáquio Souza; Universidade Federal de Lavras, Departamento de Biologia, Setor de Microbiologia.
The nutritional requirements of A. brasiliensis in culture media were assessed by supplementing a basal medium (g L-1): (glucose, 10, KH2PO4, 1, MgSO4.7H2O, 0.5, [NH4]2SO4, 1, pH 5.5) with CaCl2, trace elements (FeSO4.7H2O; MnCl2.4H2O; ZnSO4.7H2O; CuSO4.5H2O), casein, yeast extract, peptone, B-vitamins or amino acids. Evaluations were based on the mycelial growth in solid or liquid culture (mm day-1 or mg day-1) and visual analysis of the colony. The addition of CaCl2 and trace elements was very important for the major mycelial growth of the fungi. The addition of casein and inositol to the medium did not have a significant effect on growth. The best growth result in solid medium was obtained with the basal medium plus the addition of yeast extract and...
Tipo: Crescimento micelial, exigências nutricionais
Palavras-chave: 2.12.00.00-9 Mushroom; Trace elements; B-vitamins; Amino acids Microbiologia Mushroom; Trace elements; B-vitamins; Amino acids.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7010

Effects of nitrogen fertilizer input on the composition of mineral elements in corn grain
Provedor de dados: 115
Autores: Yu-kui,Rui; Shi-ling,Jiang; Fu-suo,Zhang; Jian-bo,Shen.
Excessive and inappropriate application of industrial N fertilizer can result in severe environmental and ecological problems, but whether the input of N fertilizer could affect the composition of mineral elements in corn has not been reported. Effects of input of N fertilizer on the composition of mineral elements (Se, Mo, I, Mn, Fe, Cu, Zn, Ca, Cr, K, Na, and Mg), in corn grain were investigated by ICP-MS (inductive coupling plasma-mass spectrometry). Se, I, Mn, Fe, Zn, Cr, K and Ca were significantly lower in the treatments with N fertilizer compared to a control without N fertilizer. There was a significant negative conrrelation (R) between four mineral elements and N fertilizer input: I, -0.71; Zn, -0.65; Ca, -0.75; K, -0.89. Therefore appropriate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn grain; ICP-MS; Plant nutrition; Trace elements; Urea.
Ano: 2009
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000100003

Zn, Co, Cr, As, and genotoxic effects in the ichthyofauna species from polluted and non-polluted/protected estuaries of the São Paulo coast, Brazil
Provedor de dados: 42
Autores: BRAGA,ELISABETE S.; AZEVEDO,JULIANA S.; KUNIYOSHI,LEONARDO; FÁVARO,DÉBORAH I.T.
Abstract: The human impact on estuarine regions results in an increasing concentration of trace elements in the environment, exposing aquatic organisms. In this study, Zn, Co, Cr, and As were determined in the muscle tissue of some fish species from Santos-São Vicente (SSV), a recognized polluted region, and in the Cananeia estuary (CAN). Genotoxicity was also determined for the evaluation of the chronic effect on ichthyofauna, to enlarge the bank of environmental data regarding the effects of pollution, and to suggest other fish bioindicator species that may contribute to monitoring programs. The obtained data showed a similar profile of an accumulation of Co and Zn in Micropogonias furnieri and Chaetodipterus faber, where: Santos Bay &gt; CAN &gt; inner...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Nuclear abnormalities in erythrocytes; Protected areas; South atlantic; Subtropical estuaries.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700501

Geochemical behaviour of trace elements during fractional crystallization and crustal assimilation of the felsic alkaline magmas of the state of Rio de Janeiro, Brazil
Provedor de dados: 42
Autores: MOTOKI,AKIHISA; SICHEL,SUSANNA E.; VARGAS,THAIS; MELO,DEAN P.; MOTOKI,KENJI F.
ABSTRACT This paper presents geochemical behaviour of trace elements of the felsic alkaline rocks of the state of Rio de Janeiro, Brazil, with special attention of fractional crystallization and continental crust assimilation. Fractionation of leucite and K-feldspar increases Rb/K and decreases K2O/(K2O+Na2O). Primitive nepheline syenite magmas have low Zr/TiO2, Sr, and Ba. On the Nb/Y vs. Zr/TiO2 diagram, these rocks are projected on the field of alkaline basalt, basanite, and nephelinite, instead of phonolite. Well-fractionated peralkaline nepheline syenite has high Zr/TiO2 but there are no zircon. The diagrams of silica saturation index (SSI) distinguish the trends originated form fractional crystallization and crustal assimilation. In the field of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nepheline syenite; Alkaline syenite; Trace elements; Rare earth elements; Fractional crystallization; Continental crust assimilation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000501959

Elemental composition of vegetables cultivated over coal-mining waste
Provedor de dados: 42
Autores: ZOCCHE,JAIRO J.; ROHR,PAULA; DAMIANI,ADRIANI P.; LEFFA,DANIELA D.; MARTINS,MIRIAM C.; ZOCCHE,CAROLINE M.; TEIXEIRA,KARINA O.; BORGES,GABRIELA D.; JESUS,MAIELLEN M. DE; SANTOS,CARLA E.I. DOS; DIAS,JOHNNY F.; ANDRADE,VANESSA M. DE.
ABSTRACT We assessed elemental composition of the liver in mice subjected to one-time or chronic consumption of the juice of vegetables cultivated in a vegetable garden built over deposits of coal waste. Lactuca sativa L. (lettuce), Beta vulgaris L. (beet), Brassica oleracea L. var. italica (broccoli) and Brassica oleracea L. var. acephala (kale) were collected from the coal-mining area and from a certified organic farm (control). Elemental composition was analyzed by particle-induced X-ray emission (PIXE) method. Concentrations of Mg, S, and Ca of mice subjected to one-time consumption of broccoli and concentrations of these same elements plus Si of mice receiving kale were higher in the coal-mining area. Concentrations of P, K, and Cu were increase after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coal; Anthropogenic soil; Trace elements; Heavy metals; Plants; PIXE.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502383

Study of the Cu, Mn, Pb and Zn dynamics in soil, plants and bee pollen from the region of Teresina (PI), Brazil
Provedor de dados: 42
Autores: Silva,Aline S.; Araújo,Sebastião B.; Souza,Darcet C.; Silva,Fábio A. Santos e.
The purpose of this study is to characterize native bee plants regarding their capacity to extract and accumulate trace elements from the soil and its consequences to the sanity of the produced pollen. The trace elements Cu, Mn, Pb and Zn were analyzed in soil, plants and bee pollen from Teresina region (PI), Brazil, by flame atomic absorption spectrophotometer. Considering the studied plant species, Cu and Pb metals presented in the highest levels in the roots of B. platypetala with 47.35 and 32.71 μg.mL-1 and H. suaveolens with 39.69 and 17.06 μg.mL-1, respectively, while in the aerial parts Mn and Zn metals presented the highest levels in S. verticillata with 199.18 and 85.73 μg.mL-1. In the pollen, the levels of Cu, Mn, Pb and Zn vary from 5.44 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bee pollen; Bee plant; Trace elements; Translocation capacity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400003

Some macro and trace elements in various tissues of Van fish variations according to gender and weight
Provedor de dados: 45
Autores: Yeltekin,A.Ç.; Oğuz,A.R.
ABSTRACT Van fish is a fish that can live in soda water at pH 9-10. Van fishing area is a very important source of protein for the people. The variations in tissue metal levels according to gender and weight in Van fish (Alburnus tarichi, Güldenstadt 1814) were studied. This study was conducted for the first time in Van fish. Which it is very important for living organisms Calcium(Ca), magnesium(Mg), sodium(Na), potassium(K), cobalt(Co), chromium(Cr) and lithium(Li) elements levels in the muscle, liver, gill, gonad, and brain tissues of Van fish were investigated by using inductively-coupled plasma-optic emission spectroscopy (ICP-OES). The results were evaluated in two groups as macro-elements(Ca, Mg, Na, K) and trace-elements(Co, Cr, Li). Cobalt...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Van fish; ICP-OES; Macro elements; Trace elements; Van lake.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100231

Assessment of heavy metal residues in Brazilian poultry and swine tissue
Provedor de dados: 45
Autores: Alkmim Filho,J. F.; Germano,A.; Dibai,W.L.S.; Vargas,E.A.; Melo,M.M.
The aim of this study was to investigate the presence of arsenic, lead and cadmium residues in samples of liver, kidney and muscle of poultry and swine during the years from 2002 to 2008. A total of 1978 samples were analyzed: 1031 of poultry and 947 of swine from Brazilian slaughterhouses. The samples were analyzed at the National Agricultural Laboratory using the atomic absorption spectrometry technique. In poultry, the arsenic residues were detected in 53.6% of liver samples, although no results have exceeded the MRL. In kidneys, 39.7% of the samples showed measurable residues and there was no violation of the limits. Regarding lead, there were 5 contaminated liver samples and 24 contaminated kidney samples (1.5 and 3.6% respectively). In muscle tissue...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Arsenic; Cadmium; Lead.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000200022

Copper and zinc fractions in the profile of an Inceptisol cultivated with apple in southern Brazil
Provedor de dados: 53
Autores: Brunetto,Gustavo; Benedet,Lucas; Ambrosini,Vítor Gabriel; Comin,Jucinei Jose; Melo,George Wellington Bastos de; Santos,Matheus Ademir dos; Lourenzi,Cledimar Rogério; Loss,Arcangelo; Belli Filho,Paulo; Schmitt,Djalma Eugênio; Couto,Rafael.
ABSTRACT The present study aimed to evaluate the accumulation and distribution of Cu and Zn fractions in the profile of an Inceptisol by application of fungicides with a previous history of apple cultivation in southern Brazil. Stratified soil samples (0.0 – 0.025 m, 0.025 –0.050 m, 0.05 – 0.10 m, 0.10 – 0.15 m, 0.15 – 0.20 m and 0.20 – 0.40 m depth) were collected in two apple orchards (8 years old and 18 years old), and in a native pasture area adjacent to the orchards. The soil was subjected to analysis of physical and chemical properties and to chemical fractionation of Cu and Zn. The fractions of soluble, exchangeable, organic, residual and total Cu and Zn accumulated in the topsoil (0.0 – 0.025 m) of the orchards, being higher in the orchard...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malus domestica; Trace elements; Toxicity; Environmental contamination.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000200333

Assessment of antioxidants status and superoxide dismutase activity in HIV-infected children
Provedor de dados: 55
Autores: Pugliese,Camila; Patin,Rose Vega; Palchetti,Cecilia Zanin; Claudio,Cristiane Chiantelli; Gouvêa,Aída de Fátima Thomé Barbosa; Succi,Regina Célia de Menezes; Amancio,Olga Maria Silverio; Cozzolino,Silvia Maria Franciscato; Oliveira,Fernanda Luisa Ceragioli.
Objective:This study aims to assess the nutritional status of selenium, copper and zinc; and also the erythrocyte superoxide dismutase activity of HIV-infected children compared to a control group.Methods:A cross-sectional study was carried out with prepubertal HIV-infected children (n = 51) and their healthy siblings (n = 32). All biochemical measurements including plasma selenium, serum copper levels, serum and erythrocyte zinc levels and erythrocyte super-oxide dismutase activity were evaluated according to dietary, clinical and biochemical parameters.Results:Compared to the control group, the HIV-infected children had lower z-score values for height-for-age (p = 0.0006), higher prevalence of stunting (11.8%) (p = 0.047), lower selenium levels (p =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidants; HIV and nutrition; Oxidative stress; Trace elements.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000500481

Effect of arbuscular mycorrhizal fungi on young vines in copper-contaminated soil
Provedor de dados: 58
Autores: Ambrosini,Vítor Gabriel; Voges,Joana Gerent; Canton,Ludiana; Couto,Rafael da Rosa; Ferreira,Paulo Ademar Avelar; Comin,Jucinei José; Melo,George Wellington Bastos de; Brunetto,Gustavo; Soares,Cláudio Roberto Fonsêca Sousa.
Abstract High copper (Cu) levels in uprooted old vineyard soils may cause toxicity in transplanted young vines, although such toxicity may be reduced by inoculating plants with arbuscular mycorrhizal fungi (AMF). The objective of this study was to evaluate the effects of AMF on the plant growth, chlorophyll contents, mycorrhizal colonization, and Cu and phosphorus (P) absorption in young vines cultivated in a vineyard soil contaminated by Cu. Commercial vineyard soil with high Cu levels was placed in plastic tubes and transplanted with young vines, which were inoculated with six AMF species (Dentiscutata heterogama, Gigaspora gigantea, Acaulospora morrowiae, A. colombiana, Rhizophagus clarus, R. irregularis) and a control treatment on randomized blocks...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycorrhizae; Trace elements; Phosphorus; Vitis sp.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401045

Organic Matter Reduces Copper Toxicity for the Earthworm Eisenia fetida in Soils from Mining Areas in Central Chile
Provedor de dados: 117
Autores: Ávila,Gonzalo; Gaete,Hernán; Sauvé,Sébastien; Neaman,Alexander.
The Aconcagua River basin (Central Chile) is one of the most important agricultural areas in the country. However, several copper (Cu) mining operations are located in the basin. The objective of the study was to determine Cu toxicity for the earthworm Eisenia fetida (Savigny 1826) in the agricultural soils of the basin. We determined the production of cocoons and juveniles of earthworms in the studied soils. The soils differed in the concentrations of organic matter (OM, range 2-6%), pH (range 7.3-8.3), texture (from loamy sand to clay loam), and total Cu concentrations (range 230-960 mg kg-1). Concentrations of Cu and OM in the soils were the variables that determined the earthworms’ biological response. In contrast, pH and texture did not affect this...
Tipo: Journal article
Palavras-chave: Aconcagua River; Ecological risk assessment; Cu mining; Trace elements.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000200015

Biochar in sugar beet production and nutrition
Provedor de dados: 65
Autores: Zelaya,Katherin Prissila Sevilla; Alves,Barbara Samartini Queiroz; Colen,Fernando; Frazão,Leidivan Almeida; Sampaio,Regynaldo Arruda; Pegoraro,Rodinei Facco; Fernandes,Luiz Arnaldo.
ABSTRACT:  The biomass pyrolysis process may be an alternative for the agricultural use of sewage sludge. This study aimed to evaluate the use of of biochars from mixture of sewage sludge and sugarcane bagasse (BB, 1:1 relationship sewage sludge and sugarcane bagasse) on sugar beet (Beta vulgaris L.) production and nutrition. A greenhouse experiment was conducted with five application rates of BB: 0, 2.5, 5, 7.5, and 10% (v/v), and two additional treatments, biochar from sewage sludge (BS, application rate 5% (v/v)) and conventional treatment (CV) that received lime and mineral fertilizer. The treated soils were incubated for 45 days, after which, seedlings were cultivated for 55 days. Biochar produce from sewage sludge and sugarcane bagasse is an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beta vulgaris L.; Trace elements; Pyrolysis; Fine roots.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500202