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| Berthod, Alain; Foucault, Alain. |
| An inaccuracy in the computation of the linear mobile phase velocity rendered the whole content of a recently published article, QZ Du, P.D. Wu, Y, Ito, J. Liq. Chromatogr. and Rel. Technol., 23(19), 2929 (2000), erroneous. Since the stationary phase volume was given, the correct mobile phase velocity values were computed and the now values for the Van Deemter plots of three compounds are listed. It is concluded that the 1.5 mL/min flow rate, corresponding to the minimum of the Van Deemter plots, or the maximum efficiency, does not justify calling the technique High Speed CCC since three hours are needed to develop the chromatogram. |
| Tipo: Text |
Palavras-chave: Chromatogram; Phase; Computation; Plot. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-732.PDF |
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| Pougnet, F.; Blanc, G; Mulamba-guilhemat, E.; Coynel, A.; Gil-diaz, T.; Bossy, C.; Strady, E.; Schäfer, J.. |
| Despite major management efforts initiated in 1987 and 2007 and decreasing emissions in the Gironde watershed, cadmium (Cd) levels in oysters from the downstream Gironde estuary are still higher to the consumption limit (5 mg/kg, dw, EC). Dissolved Cd concentrations were measured in surface water collected in the Gironde estuary during nine cruises (2014 – 2015). The obtained theoretical (Cdd0) concentrations and the daily net Cdd fluxes, using the Boyle’s method, confirm a decadal stepping decrease of the Cd pollution corresponding to that observed in the oysters from the long term national monitoring for priority contaminants at the estuary mouth. As this observation invalidates the previous estimating methods for estimating annual net Cdd fluxes, we... |
| Tipo: Text |
Palavras-chave: Estuaire; Cadmium dissous; Modélisation; Flux nets; Estuary; Dissolved cadmium; Computation; Net fluxes. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00485/59713/62808.pdf |
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| Simanca, Jacqueline; González-Sánchez, Patricia; Arriaza, Liliam; Ramírez, Orlando; Alburquerque, Oralis. |
| En la validación de los resultados de investigaciones en ciencias ambientales, se hace necesario la utilización de las pruebas estadísticas no paramétrica de comparación múltiple. Uno de los métodos empleados con este objetivo es la prueba Nemenyi con modificación de Dunn para datos no balanceados y ligados, sin embargo, no existe ningún software estadístico que incluya esta prueba. El presente trabajo tiene como objetivo ofrecer una herramienta computacional para el cálculo de esta prueba no paramétrica, CONEM, teniendo como restricción que el número máximo de muestras a analizar es 24. Esta herramienta consta de un conjunto de funciones ejecutables en la herramienta matemática MATLAB. La interfase de la herramienta con el usuario es un menú principal que... |
| Tipo: Journal Contribution |
Palavras-chave: Statistics; Computation; Environment management. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4566 |
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