Search Results - "Felipe Augusto Dörr"

Alternative Isolation Protocol for Desulfo and Zwitterionic Cylindrospermopsin Alkaloids and Comparison of Their Toxicity in HepG2 Cells by González-Blanco, Carlos, Dörr, Felipe Augusto, Albuquerque, Renata, Onuki, Janice, Pinto, Ernani

“…The term cylindrospermopsins (CYNs) refers to a structurally related class of cyanobacterial metabolites comprised of a tricyclic guanidine group and a…”
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Structural Characterization of New Peptide Variants Produced by Cyanobacteria from the Brazilian Atlantic Coastal Forest Using Liquid Chromatography Coupled to Quadrupole Time-of-Flight Tandem Mass Spectrometry by Sanz, Miriam, Andreote, Ana Paula Dini, Fiore, Marli Fatima, Dörr, Felipe Augusto, Pinto, Ernani

“…Cyanobacteria from underexplored and extreme habitats are attracting increasing attention in the search for new bioactive substances. However, cyanobacterial…”
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Co-occurrence of microcystin and microginin congeners in Brazilian strains of Microcystis sp by Carneiro, Ronaldo Leal, Dörr, Felipe Augusto, Dörr, Fabiane, Bortoli, Stella, Delherbe, Nathalie, Vásquez, Mónica, Pinto, Ernani

“…Abstract Species of Microcystis are the most common bloom-forming cyanobacteria in several countries. Despite extensive studies regarding the production of…”
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Genomic and Metabolomic Analyses of Natural Products in Nodularia spumigena Isolated from a Shrimp Culture Pond by Popin, Rafael Vicentini, Delbaje, Endrews, de Abreu, Vinicius Augusto Carvalho, Rigonato, Janaina, Dörr, Felipe Augusto, Pinto, Ernani, Sivonen, Kaarina, Fiore, Marli Fatima

“…The bloom-forming cyanobacterium CENA596 encodes the biosynthetic gene clusters (BGCs) of the known natural products nodularins, spumigins,…”
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Tryptamine and dimethyltryptamine inhibit indoleamine 2,3 dioxygenase and increase the tumor-reactive effect of peripheral blood mononuclear cells by Tourino, Melissa Cavalheiro, de Oliveira, Edson Mendes, Bellé, Luziane Potrich, Knebel, Franciele Hinterholz, Albuquerque, Renata Chaves, Dörr, Felipe Augusto, Okada, Sabrina Sayori, Migliorini, Silene, Soares, Irene Silva, Campa, Ana

“…Indoleamine 2,3‐dioxygenase (IDO) is an interferon‐γ (IFN‐γ)–induced tryptophan‐degrading enzyme, producing kynurenine (KYN) that participates in the mechanism…”
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Stability Analyses by HPLC-MS of Guanitoxin Isolated from Sphaerospermopsis torques-reginae by Fernandes, Kelly, Dörr, Felipe Augusto, Pinto, Ernani

“…Guanitoxin (GNT) is a natural organophosphate produced by some species of freshwater cyanobacteria, which inhibits the active site of acetylcholinesterase,…”
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A bioinspired nitrone precursor to a stabilized nitroxide radical by Pinheiro, Amanda Capistrano, Fazzi, Rodrigo Boni, Esteves, Larissa Cerrato, Machado, Caroline Oliveira, Dörr, Felipe Augusto, Pinto, Ernani, Hattori, Yocefu, Sa, Jacinto, da Costa Ferreira, Ana Maria, Bastos, Erick Leite

“…Nitrones derived from natural antioxidants are emerging as highly specific therapeutics against various human diseases, including stroke, neurodegenerative…”
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First report of spumigin production by the toxic Sphaerospermopsis torques-reginae cyanobacterium by Sanz, Miriam, Dörr, Felipe Augusto, Pinto, Ernani

“…High resolution mass spectrometry investigation of an extract of the toxic cyanobacterium Sphaerospermopsis torques-reginae ITEP-024 led to the discovery of…”
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Cylindrospermopsin and saxitoxin synthetase genes in Cylindrospermopsis raciborskii strains from Brazilian freshwater by Hoff-Risseti, Caroline, Dörr, Felipe Augusto, Schaker, Patricia Dayane Carvalho, Pinto, Ernani, Werner, Vera Regina, Fiore, Marli Fatima

“…The Cylindrospermopsis raciborskii population from Brazilian freshwater is known to produce saxitoxin derivatives (STX), while cylindrospermopsin (CYN), which…”
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Permanent occurrence of Raphidiopsis raciborskii and cyanotoxins in a subtropical reservoir polluted by domestic effluents (Itupararanga reservoir, São Paulo, Brazil) by dos Santos Machado, Leila, Dörr, Fabiane, Dörr, Felipe Augusto, Frascareli, Daniele, Melo, Darllene S., Gontijo, Erik S. J., Friese, Kurt, Pinto, Ernani, Rosa, André Henrique, Pompêo, Marcelo M., Moschini-Carlos, Viviane

“…Toxic cyanobacteria blooms are a frequent problem in subtropical reservoirs and freshwater systems. The purpose of this study was to investigate the occurrence…”
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Responses of Aquatic Nontarget Organisms in Experiments Simulating a Scenario of Contamination by Imidacloprid in a Freshwater Environment by Queiroz, Lucas Gonçalves, do Prado, Caio César Achiles, de Almeida, Éryka Costa, Dörr, Felipe Augusto, Pinto, Ernani, da Silva, Flávio Teixeira, de Paiva, Teresa Cristina Brazil

“…Several studies have indicated the presence of the neonicotinoid insecticide imidacloprid (IMI) in aquatic ecosystems in concentrations up to 320.0 µg L −1 …”
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Anti-atherogenic and anti-angiogenic activities of polyphenols from propolis by Daleprane, Julio Beltrame, da Silva Freitas, Vanessa, Pacheco, Alejandro, Rudnicki, Martina, Faine, Luciane Aparecida, Dörr, Felipe Augusto, Ikegaki, Masaharu, Salazar, Luis Antonio, Ong, Thomas Prates, Abdalla, Dulcinéia Saes Parra

“…Propolis is a polyphenol-rich resinous substance extensively used to improve health and prevent diseases. The effects of polyphenols from different sources of…”
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A comparative study of the purification of betanin by Gonçalves, Letícia Christina Pires, Trassi, Marco Aurélio de Souza, Lopes, Nathana Barbosa, Dörr, Felipe Augusto, Santos, Monica Teixeira dos, Baader, Wilhelm Josef, Oliveira, Vani Xavier, Bastos, Erick Leite

“…► Seven methods were tested for the purification of betanin from complex matrices. ► Adequate quantification of betanin by UV–Vis absorbance depends on the…”
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Microcystins in South American aquatic ecosystems: Occurrence, toxicity and toxicological assays by Dörr, Felipe Augusto, Pinto, Ernani, Soares, Raquel Moraes, Feliciano de Oliveira e Azevedo, Sandra Maria

“…The acute poisoning of chronic renal patients during hemodialysis sessions in 1996 in Caruaru City (Pernambuco State, Brazil) stimulated an intensive search…”
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Effect of dielectric microwave heating on the color and antiradical capacity of betanin by Gonçalves, Letícia Christina Pires, Di Genova, Bruno Martorelli, Dörr, Felipe Augusto, Pinto, Ernani, Bastos, Erick Leite

“…•Heating methods are compared using a specific experimental assembly.•Thermal treatment using microwave irradiation bleaches betanin.•Bleaching rates are not…”
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Can creatine supplementation form carcinogenic heterocyclic amines in humans? by Pereira, Renato Tavares dos Santos, Dörr, Felipe Augusto, Pinto, Ernani, Solis, Marina Yazigi, Artioli, Guilherme Giannini, Fernandes, Alan Lins, Murai, Igor Hisashi, Dantas, Wagner Silva, Seguro, Antônio Carlos, Santinho, Mirela Aparecida Rodrigues, Roschel, Hamilton, Carpentier, Alain, Poortmans, Jacques Remi, Gualano, Bruno

“…Key points There is a long‐standing concern that creatine supplementation could be associated with cancer, possibly by facilitating the formation of…”
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Comparative analysis of the gas-phase reactions of cylindrospermopsin and the difference in the alkali metal cation mobility by Dörr, Felipe Augusto, Tomaz, José Carlos, Lopes, Norberto Peporine, Pinto, Ernani

“…Cylindrospermopsin (CYN) belongs to a group of toxins produced by several strains of freshwater cyanobacteria. It is a compact zwitterionic molecule composed…”
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Nomenclaturas de espectrometria de massas em língua portuguesa by Vessecchi, Ricardo, Lopes, Norberto Peporine, Gozzo, Fábio Cesar, Dörr, Felipe Augusto, Murgu, Michael, Lebre, Daniel Temponi, Abreu, Renato, Bustillos, Oscar Vega, Riveros, José Manuel

“…In commemoration of the International Year of Chemistry this article presents the normalization and standardization of key terms used in mass spectrometry in…”
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Determination of serum levels of imatinib mesylate in patients with chronic myeloid leukemia: validation and application of a new analytical method to monitor treatment compliance by Rezende, Vinícius Marcondes, Rivellis, Ariane Julio, Gomes, Melissa Medrano, Dörr, Felipe Augusto, Novaes, Mafalda Megumi Yoshinaga, Nardinelli, Luciana, Costa, Ariel Lais de Lima, Chamone, Dalton de Alencar Fisher, Bendit, Israel

“…The goal of this study was to monitor imatinib mesylate therapeutically in the Tumor Biology Laboratory, Department of Hematology and Hemotherapy, Hospital das…”
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Methods for detection of anatoxin-a(s) by liquid chromatography coupled to electrospray ionization-tandem mass spectrometry by Dörr, Felipe Augusto, Rodríguez, Vania, Molica, Renato, Henriksen, Peter, Krock, Bernd, Pinto, Ernani

“…Anatoxin-a(s) is a potent irreversible inhibitor of the enzyme acetylcholinesterase with a unique N-hydroxyguanidine methylphosphate ester chemical structure…”
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