Search Results - "Hamacher, Cláudia"

Community-based assessment of marine resources contamination after a large-scale oil spill by HAMACHER, CLÁUDIA, FARIAS, CÁSSIA O., ARAÚJO, MICHELLE P., PITTA, JOÃO PEDRO M.P., SANTOS, CARLOS ALBERTO P. DOS, SOARES, MÁRIO LUIZ GOMES

“…Abstract As of August 2019, several oil slicks reached the Brazilian coast, compromising local ecosystems and the economy of coastal communities. In this…”
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Fecal sterols as sewage contamination indicators in Brazilian mangroves by Araújo, Michelle Passos, Hamacher, Cláudia, Farias, Cássia de Oliveira, Soares, Mário Luiz Gomes

“…Recent sewage contamination in Brazilian mangrove forests was evaluated using fecal sterols as biomarkers and socioeconomic indicators. The sterols were…”
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Carbon isotopic composition of leaf wax n-alkanes in mangrove plants along a latitudinal gradient in Brazil by Ceccopieri, Milena, Scofield, Arthur L., Almeida, Lilian, Araújo, Michelle P., Hamacher, Cláudia, Farias, Cássia O., Soares, Mario L.G., Carreira, Renato S., Wagener, Angela L.R.

“…•Molecular and δ13C values from leaf wax n-alkanes of mangrove trees were determined.•The influence of tree physiology, local hydrology and climatic factors…”
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Aliphatic and polycyclic aromatic hydrocarbons in surface sediments as a tool for the assessment of the contamination status of mangrove forests in Rio de Janeiro (Brazil) by Ceccopieri, Milena, Farias, Cássia O., Araújo, Michelle, Soares, Mario L.G., Estrada, Gustavo C.D., Wagener, Angela, Hamacher, Cláudia

“…The distribution of aliphatic and polycyclic aromatic hydrocarbons (PAHs) in surface sediments from mangrove forests of the Rio de Janeiro State was…”
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Assessment of brazilian mangroves hydrocarbon contamination from a latitudinal perspective by Araújo, Michelle Passos, Hamacher, Cláudia, de Oliveira Farias, Cássia, Martinho, Plínio, de Oliveira Chaves, Filipe, Gomes Soares, Mário Luiz

“…The present study investigated the contamination of Brazilian mangroves sediments by aliphatic hydrocarbons (AHs) and polycyclic aromatic hydrocarbons (PAHs)…”
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Variability of carbon content in mangrove species: Effect of species, compartments and tidal frequency by Rodrigues, Daniela Pelluso, Hamacher, Cláudia, Estrada, Gustavo Calderucio Duque, Soares, Mário Luiz Gomes

“…•Carbon content is controlled by species and plant part, not by physiographic types.•Woody parts, green parts and roots differed distinctly in carbon content…”
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Offshore drilling effects in Brazilian SE marine sediments: a meta-analytical approach by Dore, Marina Pereira, Farias, Cássia, Hamacher, Cláudia

“…The exploration and production of oil and gas reserves often result to drill cutting accumulations on the seafloor adjacent to drill locations. In this study,…”
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Magnitudes of Electron-Withdrawing Effects of the Trifluoromethyl Ligand in Organometallic Complexes of Copper and Nickel by Kieltsch, Iris, Dubinina, Galyna G, Hamacher, Claudia, Kaiser, André, Torres-Nieto, Jorge, Hutchison, John M, Klein, Axel, Budnikova, Yulia, Vicic, David A

“…A variety of nickel and copper complexes bearing the trifluoromethyl ligand have been prepared in order to quantify by electrochemical methods the redox…”
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Assessment of PAHs occurrence and distribution in brown mussels (Perna perna Linnaeus 1758) subject to different levels of contamination in Brazil by Ramos, Ana Beatriz A., Farias, Cássia O., Hamacher, Cláudia, Araújo, Michelle

“…Polycyclic aromatic hydrocarbons (PAHs) are broadly studied due to their deleterious effects on organisms and humans. In this paper, the brown mussels (Perna…”
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Historical Evolution of Organic Matter Accumulation in a Coastal Bay in the SW Atlantic, Brazil: Use of Sterols and n -Alcohols as Molecular Markers by Richard, Eduardo C., Hamacher, Cláudia, Farias, Cássia O., Dore, Marina P., Ribeiro, Natália C. M., Passos, Michelle A., Martinho, Plinio F., Godoy, José M., Carreira, Renato S.

“…The deposition processes and preservation of organic matter (OM) in the sediments of Ilha Grande Bay, SW Atlantic, were evaluated based on elemental…”
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The determination of PAH by UV-fluorescence spectroscopy in water of Guanabara Bay, Rio de Janeiro, Brazil by Cláudia Hamacher, Ana Paula Xavier Brito, Inái M.R. de Andrade Brüning, Angela Wagener, Isabel Moreira

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Assessing the Character of the C6F5 Ligand from the Electrochemical and Photophysical Properties of [Ni(C6F5)2(N∧N)] Complexes by Jordan, Rose, Schäfer, Sascha A., Sander, Noah, Maisuls, Ivan, Hamacher, Claudia, Friedel, Joshua, Strassert, Cristian A., Klein, Axel

“…Organonickel complexes containing α-diimine ligands [Ni­(C6F5)2(N∧N)] (N∧N = 2,2′-bipyridine (bpy), 2,9-dimethyl-1,10-phenanthroline (dmphen),…”
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Is copper an inhibiting factor for primary production in the upwelling waters of Cabo Frio? by Diniz, Antônia G., Hamacher, Claudia, Wagener, Angela de L. R., Gonzalez-Rodriguez, Eliane

“…The goal of the present work was to test the hypothesis that inorganic species of copper may inhibit primary production in upwelling waters from the Cabo Frio…”
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Contrasting dissolved organic carbon concentrations in the Bransfield Strait, Northern Antarctic Peninsula: insights into ENSO and SAM effects by Avelina, Raquel, da Cunha, Leticia C., Farias, Cássia de O., Hamacher, Claudia, Kerr, Rodrigo, Mata, Mauricio M.

“…The marine reservoir of dissolved organic carbon (DOC) is equivalent to the atmospheric carbon reservoir and represents the largest reduced carbon stock in the…”
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Contrasting end-summer distribution of organic carbon along the Gerlache Strait, Northern Antarctic Peninsula: Bio-physical interactions by da Cunha, Leticia C., Hamacher, Claudia, Farias, Cassia de O., Kerr, Rodrigo, Mendes, Carlos Rafael B., Mata, Mauricio M.

“…Dissolvedorganic carbon (DOC) was determined at the Gerlache Strait, a coastal area off the Northern Antarctic Peninsula, in the austral summers of 2015 and…”
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Assessing the Character of the C 6 F 5 Ligand from the Electrochemical and Photophysical Properties of [Ni(C 6 F 5 ) 2 (N ∧ N)] Complexes by Jordan, Rose, Schäfer, Sascha A, Sander, Noah, Maisuls, Ivan, Hamacher, Claudia, Friedel, Joshua, Strassert, Cristian A, Klein, Axel

“…Organonickel complexes containing α-diimine ligands [Ni(C F ) (N N)] (N N = 2,2'-bipyridine (bpy), 2,9-dimethyl-1,10-phenanthroline (dmphen),…”
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Domestic Effluent Contamination in Mangrove Areas: A Latitudinal Perspective in Brazil by Araujo, Michelle Passos, Hamacher, Claudia, de Oliveira Farias, Cássia, Estrada, Gustavo Calderuccio Duque, Soares, Mário Luiz Gomes

“…Recent sewage contamination in Brazilian Coast was evaluated using fecal sterols as biomarkers.The total fecal sterols concentrations in the Brazilian mangrove…”
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Oxidative Cleavage of CH3 and CF3 Radicals from BOXAM Nickel Complexes by Klein, Axel, Vicic, David A, Biewer, Christian, Kieltsch, Iris, Stirnat, Kathrin, Hamacher, Claudia

“…Oxidation of the nickel complexes [(BOXAM)Ni(R)] (HBOXAM = bis((4-isopropyl-4,5-dihydrooxazol-2-yl)phenyl)amine) with R = CF3, CH3, Cl leads to the…”
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Evaluation of tools to identify hydrocarbon sources in recent and historical sediments of a tropical bay by Wagener, Angela, Hamacher, Claudia, Farias, Cassia, Godoy, Jose Marcus, Scofield, Arthur

“…A number of diagnostic ratios have been applied as tools to distinguish provenance of hydrocarbons in sediments. In the present work the effectiveness of such…”
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Unsymmetrical N‑Aryl-1-(pyridin-2-yl)methanimine Ligands in Organonickel(II) Complexes: More Than a Blend of 2,2′-Bipyridine and N,N‑Diaryl-α-diimines? by Biewer, Christian, Hamacher, Claudia, Kaiser, Andre, Vogt, Nicolas, Sandleben, Aaron, Chin, Mason T, Yu, Siqi, Vicic, David A, Klein, Axel

“…The new organonickel complexes [(R-PyMA)­Ni­(Mes)­X] [R-PyMA = N-aryl-1-(pyridin-2-yl)­methanimine; aryl = phenyl, 2,6-Me2-, 3,5-Me2-, 2,4,6-Me3-, 2,6- i Pr2-,…”
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