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| Poyer, Salome; Loutelier-bourhis, Corinne; Tognetti, Vincent; Joubert, Laurent; Enche, Julien; Bossee, Anne; Mondeguer, Florence; Hess, Philipp; Afonso, Carlos. |
| Gonyautoxins are potent natural neurotoxic analogues of saxitoxin. Due to their biological activity and submilligram lethal dose for man, fast and efficient methods are required for their characterization. Recent advances in ion mobility-mass spectrometry (IM-MS) showed that differentiation of isomers could be achieved using specific experimental conditions involving particular buffer gases as well as cationic species. In this work, IM-MS experiments were carried out using alkali metal ions (Met = Li+, Na+ or K+) and different buffer gases (N2, N2O and CO2) to improve the differentiation of gonyautoxin isomers. The separation of [GTX + Met]+ ion was achieved for GTX2/3 and GTX1/4 from their Na or K adducts. For dcGTX2/3, the ion mobility separation can... |
| Tipo: Text |
Palavras-chave: Ion mobility; Gonyautoxin; Collision cross-section; Alkali adduct. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00317/42863/42291.pdf |
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| Silva,Francisco Carlos Mainardes da; Sachs,Luís Guilherme; and,Inês Cristina Batista Fonseca; Tavares Filho,João. |
| ABSTRACT Perennial forage crops used in crop-livestock integration (CLI) are able to accumulate large amounts of straw on the soil surface in no-tillage system (NTS). In addition, they can potentially produce large amounts of soluble organic compounds that help improving the efficiency of liming in the subsurface, which favors root growth, thus reducing the risks of loss in yield during dry spells and the harmful effects of “overliming”. The aim of this study was to test the effects of liming on two models of agricultural production, with and without crop-livestock integration, for 2 years. Thus, an experiment was conducted in a Latossolo Vermelho (Oxisol) with a very clayey texture located in an agricultural area under the NTS in Bandeirantes, PR, Brazil.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria ruziziensis; No-tillage system; Ion mobility. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501463 |
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