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Bromadiolona: un caso judicial relacionado con la muerte de abejas Acta Toxicol. Argent.
Salinas,Guillermo Pablo.
Como resultado de una investigación impulsada por la justicia, se analizaron muestras provenientes de un posible derrame intencional de plaguicidas sobre colmenas con abejas. En los análisis realizados se utilizó GC-MS previa extracción con solventes orgánicos. Debido a dificultades iniciales en la identificación de plaguicidas sobre tres de las muestras, se procedió al reprocesamiento de los cromatogramas utilizando selección de las relaciones de masas m/z 158, 173 y 143. Utilizando es herramienta analítica se obtuvieron los correspondientes cromatogramas, y los espectros de masas con coincidencia frente al divulgado para el producto de descomposición de bromadiolona (PDB), determinando que tanto las abejas como las colmenas habían tenido contacto con...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bromadiolona; CG-MS; Plaguicidas; Abejas.
Ano: 2011 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432011000200003
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Phenolic compounds and antioxidant activity of hydroalcoholic extracts of wild and cultivated murtilla (Ugni molinae Turcz.) Ciênc. Tecnol. Aliment.
Augusto,Thalita Riquelme; Salinas,Erick Sigisfredo Scheuermann; Alencar,Severino Matias; D'arce,Marisa Aparecida Bismara Regitano; Camargo,Adriano Costa de; Vieira,Thais Maria Ferreira de Souza.
Over the last decade a considerable increase in the number of studies addressing the use of antioxidants from natural sources has led to the identification and understanding of the potential mechanisms of biologically active components. This results from the fact that they can be used to replace synthetic antioxidants commonly used in food. Murtilla (Ugni molinae Turcz) is a native berry grown in Chile, and in the present study, the phenolic composition and antioxidant activity of its fruits were studied. Hydroalcoholic extracts of dehydrated fruits from two genotypes of murtilla (Ugni molinae Turcz.) were produced. Extracts of wild murtilla and 14-4 genotype fruits had 19.35 and 40.28mg GAE/g for Total Phenolic Compounds, 76.48, and 134.35μmol TEAC/g for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Extraction of phenolic compounds; Antioxidant capacity; CG-MS; Murtilla fruits.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000400004
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New group of oligosaccharides excreted in honeydew from scale insects Stigmacoccus sp. And coccus hesperidium L. Ciência Rural
Bogo,Amauri.
Analysis of the honeydew from scale insects Stigmacoccus sp. and Coccus hesperidium (L.) were carried out by paper chromatography, FAB-MS and GC-MS. The results showed three components (tri-, tetra- and penta-saccharides) which were composed by 1,4 glucose(s) linked to the glucose of sucrose. The findings therefore imply significant and novel metabolic transformations of sugars by the insect and/or microbial symbionts. From these results, structures and common names as "Stigmatriose, Stigmatetraose and Stigmapentose" were proposed for these oligosaccharides because they were found initially in Stigmacoccus sp. honeydew.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Homoptera; Oligosaccharides; FAB-MS; CG-MS; Structures.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782003000400001
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