Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados ArchiMer (18) Infoteca-e (6) J. Venom. Anim. Toxins incl. Trop. Dis. (6) Scientia Agricola (3) Ciênc. Tecnol. Aliment. (2) BABT (2) BJM (2) BJPS (2) Genet. Mol. Biol. (2) Thai Agricultural (1) Colegio de Postgraduados (1) BJID (1) BJMBR (1) Braz. J. Plant Physiol. (1) PAB (1) Planta Daninha (1) Rev. Bras. entomol. (1) Mais... Autor FERRACINI, V. L. (3) Hess, Philipp (3) QUEIROZ, S. C. do N. de (3) Sinquin, Corinne (3) ASSALIN, M. R. (2) Babinski, Marly (2) Bendassolli,José Albertino (2) Colliec-jouault, Sylvia (2) Ferreira Araujo, Daniel (2) Garnier, Jeremie (2) Juliano,Luiz (2) Machado, Wilson (2) ROSA, M. A. (2) Ropartz, David (2) Zykwinska, Agata (2) ARAÚJO,Íris Braz da Silva (1) ARCANJO,Narciza Maria de Oliveira (1) Abdelkafi, Slim (1) Akoumany, Katy (1) Almeida Junior,Joao N. de (1) Mais... Palavra-chave Mass spectrometry (51) Espectrometria (4) Proteomics (4) Análise Química (3) Cromatografia (3) 2-DE (2) Agrotóxico (2) Analytical methods (2) Chemical analysis (2) Dereplication (2) Gas chromatography (2) Liquid chromatography (2) MALDI-TOF (2) Metal contamination (2) Método de Análise (2) NMR (2) Purification (2) Stable isotopes (2) Two-dimensional electrophoresis (2) 18S rRNA gene (1) Mais... Tipo do documento Info:eu-repo/semantics/article (23) Text (18) Folhetos (6) Collection (1) Info:eu-repo/semantics/report (1) Ano 2023 (2) 2021 (1) 2020 (4) 2019 (5) 2018 (6) 2017 (3) 2015 (4) 2014 (3) 2013 (6) 2012 (3) 2011 (4) 2010 (3) 2009 (1) 2008 (2) 2006 (2) 2002 (1) 2001 (1) Mais... País Brazil (31) France (18) Mexico (1) Thailand (1) Idioma Inglês (42) Português (6) Espanhol (1) Francês (1) Thailandês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 51 Primeira ... 1 2 3 ... Última Improved purification process of β- and α-trypsin isoforms by ion-exchange chromatography BABT Santos,Alexandre Martins Costa; Oliveira,Jamil Silvano de; Bittar,Eustáquio Resende; Silva,Anderson Lourenço da; Guia,Marcos Luiz dos Mares; Bemquerer,Marcelo Porto; Santoro,Marcelo Matos. The purpose of this work was to improve the separation and yield of pure β- and α-trypsin isoforms by ion-exchange chromatography and to characterize some physical-chemical properties of these isoforms. Purification of trypsin isoforms was performed by ion-exchange chromatography in 0.1 mol/L tris-HC buffer, pH 7.10 at 4ºC. The sample loading, salt concentration, flow rate and pH of mobile phase were varied to determine their effects on the resolution of the separation. The resolution was optimized mainly between β- and α-trypsin. Pure isoforms were obtained by chromatographying 100 mg of commercial trypsin during seven days, yielding 51 mg of high purity β-trypsin and 13 mg of α-trypsin partially pure, with small amounts of contaminating of ψ-trypsin.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Trypsin isoforms; Resolution; Ion-exchange chromatography; Purification; Specific activity; Mass spectrometry. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400009 Proteomic analysis of whey from bovine colostrum and mature milk BABT Golinelli,Luciana Pacheco; Conte-Junior,Carlos Adam; Paschoalin,Vânia Margaret Flosi; Silva,Joab Trajano. The aim of this study was to standardize a methodology to obtain two-dimensional (2D) maps of whey proteins from bovine colostrum and mature milk, using two-dimensional electrophoresis, in order to identify the minor proteins by matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry (MALDI TOF/TOF MS). A total of 38 proteins were identified, 20 spots in the colostrum whey and 18 in the mature milk whey; 5 of them were identified for the first time. Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovine whey proteins; Colostrum proteins; Low-abundance proteins; Two-dimensional electrophoresis; Mass spectrometry; Matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry (MALDI TOF/TOF MS). Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400016 Direct matrix-assisted laser desorption ionization time-of-flight mass spectrometry and real-time PCR in a combined protocol for diagnosis of bloodstream infections: a turnaround time approach BJID Quiles,Milene Gonçalves; Boettger,Bruno Cruz; Inoue,Fernanda Matsiko; Monteiro,Jussimara; Santos,Daniel Wagner; Ponzio,Vinicius; Carlesse,Fabianne; Cappellano,Paola; Carvalhaes,Cecilia Godoy; Pignatari,Antonio Carlos Campos. ABSTRACT Bloodstream infections (BSIs) are serious infections associated with high rates of morbidity and mortality. Every hour delay in initiation of an effective antibiotic increases mortality due to sepsis by 7%. Turnaround time (TAT) for conventional blood cultures takes 48 h, forcing physicians to streamline therapy by exposing patients to broad-spectrum antimicrobials. Our objective was (1) to evaluate the accuracy and TAT of an optimized workflow combining direct matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) and in-house real-time polymerase chain reaction (PCR) for bacterial identification and antimicrobial resistance profiling directly from positive blood bottles for diagnosing bloodstream infections... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bloodstream infections; Molecular diagnosis; Molecular panels; PCR; Mass spectrometry. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702019000300164 Proteomic data show an increase in autoantibodies and alpha-fetoprotein and a decrease in apolipoprotein A-II with time in sera from senescence-accelerated mice BJMBR Guo,S.J.; Qi,C.H.; Zhou,W.X.; Zhang,Y.X.; Zhang,X.M.; Wang,J.; Wang,H.X.. We evaluated changes in levels by comparing serum proteins in senescence-accelerated mouse-prone 8 (SAMP8) mice at 2, 6, 12, and 15 months of age (SAMP8-2 m, -6 m, -12 m, -15 m) to age-matched SAM-resistant 1 (SAMR1) mice. Mice were sacrificed, and blood was analyzed by 2-dimensional electrophoresis combined with mass spectrometry. Five protein spots were present in all SAMP8 serum samples, but only appeared in SAMR1 samples at 15 months of age except for spot 3, which also showed a slight expression in SAMR1-12 m sera. Two proteins decreased in the sera from SAMP8-2 m, -6 m, and -12 m mice, and divided into 2 spots each in SAMP8-15 m sera. Thus, the total number of altered spots in SAMP8 sera was 7; of these, 4 were identified as Ig kappa chain V region... Tipo: Info:eu-repo/semantics/article Palavras-chave: SAMP8; Serum proteins; 2-DE; Mass spectrometry; M-T413. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000500417 Direct identification of bovine mastitis pathogens by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry in pre-incubated milk BJM Barreiro,Juliana R.; Gonçalves,Juliano L.; Grenfell,Rafaella; Leite,Renata F.; Juliano,Luiz; Santos,Marcos V.. ABSTRACT The present study aimed to compare two MALDI-TOF identification methods [(a) direct sample identification after pre-incubation; or (b) use of bacteria isolated on pre-culture)] to standard, traditional bench microbiology. A total of 120 quarter milk samples from 40 Holstein lactating cows were screened based on culture-positive results obtained by microbiological culture (reference method) with the following numbers of quarters positive per cow: 4 cows with 1, 8 cows with 2, 12 cows with 3 and 16 cows with 4 infected quarters per cow. For direct identification method, quarter milk samples (n = 120) were skimmed by centrifugation (10,000 × g/10 min) and pre-incubated at 37 ºC for 12 h. After pre-incubation, quarter milk samples were submitted to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk; Bacteria; Mastitis; Mass spectrometry. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400801 Identification of pathogenic and nonpathogenic Leptospira species of Brazilian isolates by Matrix Assisted Laser Desorption/Ionization and Time Flight mass spectrometry BJM Karcher,Daniel; Grenfell,Rafaella C.; Moreno,Andrea Micke; Moreno,Luisa Zanolli; Vasconcellos,Silvio Arruda; Heinemann,Marcos B.; Almeida Junior,Joao N. de; Juliano,Luiz; Juliano,Maria A.. ABSTRACT Matrix Assisted Laser Desorption/Ionization and Time of Flight mass spectrometry (MALDI-TOF MS) is a powerful tool for the identification of bacteria through the detection and analysis of their proteins or fragments derived from ribosomes. Slight sequence variations in conserved ribosomal proteins distinguish microorganisms at the subspecies and strain levels. Characterization of Leptospira spp. by 16S RNA sequencing is costly and time-consuming, and recent studies have shown that closely related species (e.g., Leptospira interrogans and Leptospira kirschneri) may not be discriminated using this technology. Herein, we report an in-house Leptospira reference spectra database using Leptospira reference strains that were validated with a collection... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leptospira; Brazil; Identification; Mass spectrometry; MALDI-TOF. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400900 Evaluation of the bioequivalence of two formulations containing the combination of 400 mg of acetaminophen (paracetamol), 4 mg of phenylephrine and 4 mg of chlorpheniramine in capsules: open-label, three-way crossover study, partially replicated in healthy volunteers of both sexes BJPS Santos,Alessandra Ferreira dos; Santos,Quevellin Alves dos; Correa,Carlos Eduardo Melo; Coelho,Edvaldo Capobiango. This study was carried out in order to compare the relative bioavailability of two different formulations containing 400 mg of acetaminophen + 4 mg of phenylephrine hydrochloride + 4 mg of chlorpheniramine maleate, Test formulation (Cimegripe®) and Reference formulation (Resfenol®) in 84 healthy volunteers of both sexes under fasting conditions. The study was conducted in a single dose, randomized, open-label, crossover 3-way and partially replicated. The tolerability was evaluated by the monitoring of adverse events and vital signs, results of clinical and laboratory tests. Plasma concentrations were quantified by validated bioanalytical methods using the ultra-performance liquid chromatography coupled to tandem mass spectrometry. The Cmax, Tmax, AUC0-t,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Acetaminophen; Phenylephrine; Chlorpheniramine; Bioequivalence; Partially replicated crossover; Ultra-high performance liquid chromatography; Mass spectrometry. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100564 A sensitive bioanalytical method development and validation of cabozantinib in human plasma by LC-ESI-MS/MS BJPS Inturi,Srikanth; Avula,Prameela Rani. ABSTRACT A simple, sensitive and specific liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the quantification of cabozantinib (CZ) in human plasma using cabozantinib-d4 (CZD4) as an internal standard (IS). Chromatographic separation was performed on Xbridge C18, 50 x 4.6 mm, 5 mm column with an isocratic mobile phase composed of 10mM Ammonium formate and Methanol in the ratio of (20:80 v/v), at a flow-rate of 0.7 mL/min. CZ and CZD4 were detected with proton adducts at m/z 502.2 ® 391.1 and 506.3 ® 391.2 in multiple reaction monitoring (MRM) positive mode respectively. Liquid-Liquid extraction method was used to extract the drug and IS. The method was validated over a linear concentration range of 5.0-5000.0 pg/mL with... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cabozantinib/human plasma/validation; Mass spectrometry; Pharmacokinetic/study. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000200622 Challenges in proteome analyses of tropical plants Braz. J. Plant Physiol. Balbuena,Tiago S.; Dias,Leonardo L. C.; Martins,Mariana L. B.; Chiquieri,Tatiana B.; Santa-Catarina,Claudete; Floh,Eny I. S.; Silveira,Vanildo. Genome sequencing of various organisms allow global analysis of gene expression, providing numerous clues on the biological function and involvement in the biological processes studied. Proteomics is a branch of molecular biology and biotechnology that has undergone considerable development in the post-genomic era. Despite the recent significant advancements in proteomics techniques, still there is much to be improved. Due to peculiarities to the plant kingdom, proteomics approaches require adaptations, so as to improve efficiency and accuracy of results in plants. Data generated by proteomics can substantially contribute to the understanding and monitoring of plant physiological events and development of biotechnological strategies. Especially for... Tipo: Info:eu-repo/semantics/article Palavras-chave: 2-DE; Mass spectrometry; Recalcitrant species; Proteomics; Unknown genome. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000200001 Red wine produced from the Isabella and Ives cultivar (Vitis Labrusca): profile of volatiles and aroma descriptors Ciênc. Tecnol. Aliment. ARCANJO,Narciza Maria de Oliveira; OLIVEIRA,Maria Erica da Silva; ARAÚJO,Íris Braz da Silva; SILVA,Flávio Luís Honorato da; MADRUGA,Marta Suely. Abstract Considering the potential consumption and economic the importance that Isabella and Ives wines represent in the Brazilian consumer market as well as the scarcity of scientific data examining their quality, the objective of this study was to investigate the sensory quality and the volatiles profile of these wines. The volatile compounds were extracted by headspace solid-phase microextraction (HS-SPME) and a total of 54 compounds were detected in red wine samples including esters (23), terpenes (12), alcohols (10), aldehydes and ketones (5) and amines (1) as well as 3 compounds belonging to other classes. Isabella and Ives red wines were sensorially characterized by 14 descriptors, through quantitative descriptive analysis (QDA). The PCAs fruity... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aroma enology; Extraction; Fermented drink; Mass spectrometry. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000200271 Characterization and extraction of volatile compounds from pineapple (Ananas comosus L. Merril) processing residues Ciênc. Tecnol. Aliment. Barretto,Lília Calheiros de Oliveira; Moreira,Jane de Jesus da Silveira; Santos,João Antônio Belmino dos; Narendra,Narain; Santos,Raquel Anne Ribeiro dos. The aim of this study was to extract and identify volatile compounds from pineapple residues generated during concentrated juice processing. Distillates of pineapple residues were obtained using the following techniques: simple hydrodistillation and hydrodistillation by passing nitrogen gas. The volatile compounds present in the distillates were captured by the solid-phase microextraction technique. The volatile compounds were identified in a system of high resolution gas chromatography system coupled with mass spectrometry using a polyethylene glycol polar capillary column as stationary phase. The pineapple residues constituted mostly of esters (35%), followed by ketones (26%), alcohols (18%), aldehydes (9%), acids (3%) and other compounds (9%).... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agro-industrial residues; High resolution gas chromatography; Mass spectrometry. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000400007 Fertilización foliar y su ruta de penetración en la orquídea Cymbidium sp. Colegio de Postgraduados García Gaytán, Víctor. La presente investigacion se dividió en tres experimentos, dos realizados en el Colegio de Postgraduados en Ciencias Agrícolas, Campus Montecillo Edo. México y la tercera en la Facultad de Agrobiología “Presidente Juárez” Uruapan Michoacan. Dada la importancia de la fertilización foliar como práctica común en los medios de producción y escasa información disponible sobre la absorción de nutrientes a nivel foliar en orquídeas, en el primer estudio se caracterizó la anatomía foliar de Cymbidium sp. e dentificó las rutas de penetración de un fertilizante foliar 10-10-10 NPK. En esta etapa se encontró que el grosor de la cutícula varía a lo largo de la hoja. La porción media fue más gruesa (29.90 µm) que la apical y basal (26.91y 25.75 µm). El número de... Palavras-chave: Fertilización foliar; Cromatografía en capa fina; Espectrometría de masas; Pseudobulbos escapo; Foliar feeding; Thin layer chromatography; Mass spectrometry; Pseudobulbos scapes; Edafología; Maestría. Ano: 2013 URL: http://hdl.handle.net/10521/2042 Eucalyptus urograndis stem proteome is responsive to short-term cold stress Genet. Mol. Biol. Leonardi,Gabriela de Almeida; Carlos,Natália Aparecida; Mazzafera,Paulo; Balbuena,Tiago Santana. Eucalyptus urograndis is a hybrid eucalyptus of major economic importance to the Brazilian pulp and paper industry. Although widely used in forest nurseries around the country, little is known about the biochemical changes imposed by environmental stress in this species. In this study, we evaluated the changes in the stem proteome after short-term stimulation by exposure to low temperature. Using two-dimensional gel electrophoresis coupled to high-resolution mass spectrometry-based protein identification, 12 proteins were found to be differentially regulated and successfully identified after stringent database searches against a protein database from a closely related species (Eucalyptus grandis). The identification of these proteins indicated that the E.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Abiotic stress; Mass spectrometry; Omics; Proteomics. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200191 Protein profile of rice (Oryza sativa) seeds Genet. Mol. Biol. Yang,Yanhua; Dai,Li; Xia,Hengchuan; Zhu,Keming; Liu,Haijun; Chen,Keping. Seeds are the most important plant storage organ and play a central role in the life cycle of plants. Since little is known about the protein composition of rice (Oryza sativa) seeds, in this work we used proteomic methods to obtain a reference map of rice seed proteins and identify important molecules. Overall, 480 reproducible protein spots were detected by two-dimensional electrophoresis on pH 4-7 gels and 302 proteins were identified by MALDI-TOF MS and database searches. Together, these proteins represented 252 gene products and were classified into 12 functional categories, most of which were involved in metabolic pathways. Database searches combined with hydropathy plots and gene ontology analysis showed that most rice seed proteins were hydrophilic... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mass spectrometry; Proteomic analysis; Rice seed; Two-dimensional electrophoresis. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100012 Desenvolvimento de método analítico para a determinação de resíduos de herbicidas em capim-elefante. Infoteca-e ASSALIN, M. R.; BRIGHENTI, A. M.; QUEIROZ, S. C. do N. de. Resumo: O capim elefante, (Pennisetum purpureum Schum) apresenta elevado potencial para a produção de biomassa, constituindo-se numa forragem de alta qualidade. É intensamente utilizado na alimentação de ruminantes e na produção de biocombustíveis. A produtividade e a qualidade da forragem são diretamente afetadas pela interferência de plantas daninhas, resultando em considerável perda de produtividade. No Brasil não existem herbicidas registrados para o controle seletivo de plantas invasoras em cultivos de capim- elefante, sendo necessários estudos sobre potenciais herbicidas para este fim. Este trabalho tem como objetivo otimizar e validar um método multirresíduo, para determinação de atrazina, clorimurom-etílico, halossulfurom-metílico,... Tipo: Folhetos Palavras-chave: Erva invasora; LC-MS; Liquid chromatography-mass spectrometry; Resíduo Quimico; Herbicida; Capim Elefante; Análise Química; Método de Análise; Espectrometria; Erva Daninha; Pennisetum Purpureum; Invasive species; Grasses; Mass spectrometry; Analytical methods. Ano: 2023 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1159594 Dissipação de permetrina em pepino utilizando princípios de boas práticas agrícolas e de laboratório. Infoteca-e BARIZON, R. R. M.; FERRACINI, V. L.; QUEIROZ, S. C. do N. de; SOUZA, M. D. de; SPADOTTO, C. A.; SOUZA, D. R. C. de. Resumo - Este trabalho teve como objetivo realizar testes de campo e de laboratório, utilizando os princípios das boas práticas de laboratório (BPL) e boas práticas agrícolas (BPA). Esses princípios foram criados para harmonizar procedimentos e garantir a aceitação dos resultados em diferentes países e regiões da Organização para Cooperação e Desenvolvimento Econômico (OCDE), além de serem obrigatórios para registro de agrotóxicos. Para adequar à instalação de teste desses princípios foi realizado um estudo de campo com aplicação de permetrina no cultivo de pepino, que é considerado uma cultura com suporte fitossanitário insuficiente (ou minor crops). Este pesticida foi selecionado por duas razões: (a) vem sendo detectado nos programas de monitoramento, e... Tipo: Folhetos Palavras-chave: Boas práticas de laboratório; Boas práticas agrícolas; Permetrina; GC-MS/MS; Espectrometria de massas; Agrotóxico; Espectrometria; Análise Química; Pepino; Cucumis; Pesticides; Good laboratory practices; Good agricultural practices; Mass spectrometry. Ano: 2019 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1111785 Determinação de resíduos de paclobutrazol em manga (Mangifera indida L.) por cromatografia acoplada a espectometria de massas (LC-MS/MS). Infoteca-e FERRACINI, V. L.; QUEIROZ, S. C. do N. de; ROSA, M. A.; LOPES, P. R. C.. Paclobutrazol (PBZ) é um regulador de crescimento que tem sido utilizado para alterar o ciclo fenológico da mangueira visando a produção de frutos em qualquer época do ano. É bastante utilizado na região nordeste do Brasil e a determinação dos resíduos na fruta é importante pois há pouco conhecimen- to sobre o acúmulo desta substância na planta em condições brasileiras. Para isso foi necessário adaptar um método analítico para determinar resídu- os de paclobutrazol em frutos de manga. Após a extração do PBZ na matriz o extrato foi analisado por LC-MS/MS. Os limites de detecção (LOD) e de quantificação (LOQ) obtidos para o PBZ foram de 0,25 ?g Kg-1 e 1,25 ?g Kg-1, respectivamente. As recuperações foram de 82 a 94% e se encontram dentro da faixa considerada... Tipo: Folhetos Palavras-chave: LC-MS/MS; Resíduos de paclobutrazol; Especrometria; Resíduo químico; Regulador de crescimento; Análise química; Cromatografia; Manga; Paclobutrazol; Chemical residues; Chemical analysis; Chromatography; Mass spectrometry. Ano: 2011 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/898423 Determinação de agrotóxicos e ocratoxina A em café arábica sob diferentes níveis de torrefação. Infoteca-e ROSA, J. S. da; FREITAS-SILVA, O.; CAMPOS, R. da S.; CASTRO, I. M. de; TEIXEIRA, A. da S.. O café é a segunda maior commodity do mundo e tamanha importância faz do café uma matriz alimentar muito estudada. A necessidade de incremento na produtividade dessa cultura, porém, pode aumentar o uso de alguns agrotóxicos em sistemas de produção de café. Da mesma forma, as práticas de colheita e processamento pós-colheita do café estão diretamente relacionadas à contaminação dos grãos por fungos micotoxigênicos. Rastrear a presença destes dois tipos de contaminantes em amostras de café Arábica comum (com diferentes teores de grãos defeituosos) e submetidos a diferentes níveis de torra foi o objetivo deste trabalho. Os agrotóxicos foram analisados pelo método multirresíduo, por espectrometria de massas sequencial, e a ocratoxina A, por cromatografia... Tipo: Folhetos Palavras-chave: Contaminante; Cromatografia líquida de alta eficiência; Micotoxina; Coffea Arábica; Tecnologia de Alimento; Espectrometria; Cromatografia; Food technology; Vegetable products; High performance liquid chromatography; Mycotoxins; Mass spectrometry; Poisoning; Agrochemicals. Ano: 2019 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112112 Método analítico multirresíduo para determinação de agrotóxicos e seus produtos de degradação em águas superficiais. Infoteca-e SCORZA JUNIOR, R. P.; PAZ, R. B. da S.. Tipo: Folhetos Palavras-chave: Validação de método; Monitoramento; Method validation; Resíduo Agrícola; Agrotóxico; Cromatografia; Espectrometria; Pesticide residues; Liquid chromatography; Mass spectrometry; Monitoring. Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126682 Método multirresíduo para determinação de medicamentos veterinários em músculo de tilápia. Infoteca-e ASSALIN, M. R.; ROSA, M. A.; HUTTEMBERGUE, M. C.; FERRACINI, V. L.; JONSSON, C. M.. Resumo: A piscicultura tem ganhado destaque na cadeia de produção de alimentos no Brasil. O uso de medicamentos veterinários é necessário na criação de peixes em cativeiro, porém, o uso incorreto pode resultar na presença de resíduos no peixe tornando-o inapropriado para o consumo. O objetivo deste trabalho foi validar um método para determinação de sulfatiazol, sulfametazina, sulfametizol, sulfadimetoxina, florfenicol, florfenicol amina, verde de malaquita, leuco verde malaquita e triclorfon em músculo de tilápia (Oreochromis niloticus). Analitos foram extraídos de acordo com o método QuEChERS e analisados por espectrometria de massas (LC-MS/MS). O método demonstrou seletividade e linearidade (R2 ≥ 0,99) na faixa de trabalho 0,005 e 0,1 μg mL -1 . O... Tipo: Folhetos Palavras-chave: Medicamento veterinário; Método de Análise; Análise Química; Medicamento; Veterinária; Tilápia Nilótica; Oreochromis Niloticus; Músculo; Veterinary drugs; Drug residues; Analytical methods; Chemical analysis; Mass spectrometry; Tilapia (common name). Ano: 2023 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1159653 Registros recuperados: 51 Primeira ... 1 2 3 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco