|
|
|
Registros recuperados: 61 | |
|
|
Fabris,Samanta; Freire,Maria Teresa de Alvarenga; Wagner,Roger; Reyes,Felix Guillermo. |
A simple and low cost method to determine volatile contaminants in post-consumer recycled PET flakes was developed and validated by Headspace Dynamic Concentration and Gas Chromatography-Flame Ionization Detection (HDC-GC-FID). The analytical parameters evaluated by using surrogates include: correlation coefficient, detection limit, quantification limit, accuracy, intra-assay precision, and inter-assay precision. In order to compare the efficiency of the proposed method to recognized automated techniques, post-consumer PET packaging samples collected in Brazil were used. GC-MS was used to confirm the identity of the substances identified in the PET packaging. Some of the identified contaminants were estimated in the post-consumer material at concentrations... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Extraction; Validation; Gas chromatography; PET packaging. |
Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000400033 |
| |
|
|
Tandeo, Pierre; Autret, Emmanuelle; Piolle, Jean-francois; Tournadre, Jean; Ailliot, Pierre. |
The Advanced Along-Track Scanning Radiometer (AATSR) onboard Envisat is designed to provide very accurate measurements of sea surface temperature (SST). Using colocated in situ drifting buoys, a dynamical matchup database (MDB) is used to assess the AATSR-derived SST products more precisely. SST biases are then computed. Currently, Medspiration AATSR SST biases are discrete values and can introduce artificial discontinuities in AATSR level-2 SST fields. The new AATSR SST biases presented in this letter are continuous. They are computed, for nighttime and best proximity confidence data, by linear regression with different MDB covariables (wind speed, latitude, aerosol optical depth, etc.). As found, the difference between dual-view and nadir-only SST... |
Tipo: Text |
Palavras-chave: Validation; Sea surface temperature (SST); Remote sensing; Advanced Along Track Scanning Radiometer (AATSR). |
Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6135.pdf |
| |
|
|
Lagardere, Françoise; Troadec, Herve. |
Close similarities have been found between the otoliths of sea-caught and laboratory-reared larvae of the common sole Solea solea (L.), given appropriate temperatures and nourishment of the latter. But from hatching to mouth formation. and during metamorphosis, sole otoliths have proven difficult to read because the increments may be less regular and low contrast. In this study, the growth increments in otoliths of larvae reared at 12 degrees C were counted by light microscopy to test the hypothesis of daily deposition, with some results verified using scanning electron microscopy (SEM), and by image analysis in order to compare the reliability of the 2 methods in age estimation. Age was first estimated (in days posthatch) from light micrographs of whole... |
Tipo: Text |
Palavras-chave: Larval sole; Solea solea; Otolith; Daily increment; Validation; Image analysis. |
Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00337/44785/44488.pdf |
| |
|
| |
|
|
Boutron, Olivier; Bertrand, Olivier; Fiandrino, Annie; Hoehener, Patrick; Sandoz, Alain; Cherain, Yves; Coulet, Eric; Chauvelon, Philippe. |
The spatiotemporal structure of wind-driven circulation patterns and associated water exchanges can drive important bio-hydrodynamic interactions in shallow lagoons. The Vaccares lagoon system is a complex shallow hydrosystem located in the central part of the Rhone Delta (France). It is internationally recognized as part of a biosphere reserve within the framework of UNESCO's Man and Biosphere Programme, and as a RAMSAR site. Due to its frequent occurrence in this area, and considering the shallowness of the Vaccares lagoon system, wind is assumed to play a major role in the hydrodynamic and biological processes. In this study, a hydrodynamic model was developed to investigate the structure of wind-driven circulations in the Vaccares lagoon system, to... |
Tipo: Text |
Palavras-chave: Coastal lagoon; Mathematical model; Hydrodynamics; Calibration; Validation; Wind-driven circulation. |
Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00303/41382/40558.pdf |
| |
|
| |
|
|
Guimarães,Rosane Cuber; Leal,Alaide Aline Xavier. |
Method validation is the process used to confirm that the analytical procedures employed for a specific test is able to produce reliable and replicable results. An analytical method should be conducted in order to demonstrate that it is suitable for its intended use [1]. The aim of this present work is to demonstrate and evaluate the suitability of method validation. The analytical validation discussed herein was conducted by prescribed protocol, using 3 different batches of measles's vaccine diluents. All of the stipulated validation parameters: linearity, repeatability, reproducibility (intermediate precision) and accuracy were met. Additionally, this study demonstrated the method's capability for the determining endotoxin levels in measles's vaccine... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioanalytical method; Endotoxin; Validation. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000200010 |
| |
|
|
Tessier, Caroline. |
Développé par le laboratoire DEL/AO à Brest et appliqué à la rade de Toulon, le modèle MARS-3D a été installé au laboratoire de Toulon. L'objectif est de mettre en route son application à Toulon et de contribuer à l'analyse en cours des résultats du modèle, en les· comparant aux mesures historiques. Dans ce rapport sont présentés les travaux faits pour réaliser ce double objectif: l'apprentissage du modèle dans sa conception et son utilisation, l'analyse des résultats et la comparaison avec des mesures ainsi qu'une simulation de traceurs. La comparaison du modèle avec les données a été réalisée sur la base des enregistrements faits en 1986-1987 en un point de mesure au centre de la grande rade. Or, l'emboîtement des modèles crée une contrainte sur le... |
Tipo: Text |
Palavras-chave: Modèle; Tridimensionnel; Méditerranée; Hydrodynamique; Validation; Toulon. |
Ano: 2001 |
URL: https://archimer.ifremer.fr/doc/00431/54248/59141.pdf |
| |
|
| |
|
|
Hito Sepulveda, Hector; Queffeulou, Pierre; Ardhuin, Fabrice. |
SARAL/AltiKa GDR-T are analyzed to assess the quality of the significant wave height (SWH) measurements. SARAL along-track SWH plots reveal cases of erroneous data, more or less isolated, not detected by the quality flags. The anomalies are often correlated with strong attenuation of the Ka-band backscatter coefficient, sensitive to clouds and rain. A quality test based on the 1Hz standard deviation is proposed to detect such anomalies. From buoy comparison, it is shown that SARAL SWH is more accurate than Jason-2, particularly at low SWH, and globally does not require any correction. Results are better with open ocean than with coastal buoys. The scatter and the number of outliers are much larger for coastal buoys. SARAL is then compared with Jason-2 and... |
Tipo: Text |
Palavras-chave: Radar altimeter; Significant wave height; Satellite; SARAL; AltiKa; Validation. |
Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00286/39675/38199.pdf |
| |
|
|
Kanwar, Ramesh S.; Reungsang, Pipat; Jha, Manoj K.; Gassman, Philip W.; Ahmad, Khalil; Saleh, Ali. |
A validation study has been performed using the Soil and Water Assessment Tool (SWAT) model with data collected for the Upper Maquoketa River Watershed (UMRW), which drains over 16,000 ha in northeast Iowa. This validation assessment builds on a previous study with nested modeling for the UMRW that required both the Agricultural Policy EXtender (APEX) model and SWAT. In the nested modeling approach, edge-of-field flows and pollutant load estimates were generated for manure application fields with APEX and were then subsequently routed to the watershed outlet in SWAT, along with flows and pollutant loadings estimated for the rest of the watershed routed to the watershed outlet. In the current study, the entire UMRW cropland area was simulated in SWAT, which... |
Tipo: Working or Discussion Paper |
Palavras-chave: Calibration; Modeling; Nitrate; SWAT; Validation; Water quality; Resource /Energy Economics and Policy. |
Ano: 2005 |
URL: http://purl.umn.edu/18440 |
| |
|
|
Amirouche, mawhoub. |
The search for decision-making tools is essential in order to control agricultural practices and plan for sustainable agriculture that respects the environment. To this end, FAO has developed an evaluation model called AquaCrop, which covers most technical routes, including fertilization. In this perspective, this study focuses on the AquaCrop model (v6.1) to calibrate it for the simulation of lettuce crop yields (Lactuca sativa L), under different fertilization levels for the trial periods (2015/2016) and (2016/2017). Four levels of fertilization were examined under rain conditions, namely T1 (0 kg N/ha), T2 (60 kg N/ha), T3 (120 kg N/ha) and T4 (180 kg N/ha). The model performance was evaluated using the coefficient of determination (R2), the square root... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AquaCrop; Lettuce; Calibration; Validation; Fertility stress; Water productivity. |
Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6195 |
| |
|
|
Velázquez González, Julio César. |
Dado que el picudo del chile es el principal problema fitosanitario en el cultivo de Capsicum spp., y las medidas de control no han logrado mitigar de forma eficiente las poblaciones de este insecto, se estudiaron los siguientes objetivos con el fin de conocer las interacciones planta insecto. Primero se valido un método de recolecta de volátiles, el cual demostró ser eficiente bajo las diferentes variables analíticas estudiadas, con % de recobro de 90-100 y DER menores a 10%. En segundo lugar se evaluó el potencial atrayente de estructuras de la planta como flores, yemas, frutos en desarrollo y frutos comerciales, encontrando que machos prefieren en primer lugar flores y después yemas, y las hembras en su primera opción eligieron yemas y después flores.... |
|
Palavras-chave: Validación; Feromona; Capsicum; Sensilla; Cromatografía; Validation; Pheromone; Chromatography; Entomología y Acarología; Doctorado. |
Ano: 2011 |
URL: http://hdl.handle.net/10521/557 |
| |
|
|
Velázquez González, Julio César. |
Dado que el picudo del chile es el principal problema fitosanitario en el cultivo de Capsicum spp., y las medidas de control no han logrado mitigar de forma eficiente las poblaciones de este insecto, se estudiaron los siguientes objetivos con el fin de conocer las interacciones planta insecto. Primero se valido un método de recolecta de volátiles, el cual demostró ser eficiente bajo las diferentes variables analíticas estudiadas, con % de recobro de 90-100 y DER menores a 10%. En segundo lugar se evaluó el potencial atrayente de estructuras de la planta como flores, yemas, frutos en desarrollo y frutos comerciales, encontrando que machos prefieren en primer lugar flores y después yemas, y las hembras en su primera opción eligieron yemas y después flores.... |
|
Palavras-chave: Validación; Feromona; Capsicum; Sensilla; Cromatografía; Validation; Pheromone; Chromatography; Entomología y Acarología; Doctorado. |
Ano: 2011 |
URL: http://hdl.handle.net/10521/557 |
| |
|
|
Ohagwu, Chukwuemeka Jude; Okonkwo, Ifeanyi Wilfred; Mbah, Godwin Christopher Ezike; Njoku, Howard Okezie. |
Computational modeling, simulation and validation were carried out on Trombe wall solar chick brooder used for optimal poultry production. Predictive linear differential equations based on physical, mathematical principles and relationships governing thermo-physical properties of the components of the brooder were formulated, discretized and expressed in their finite different forms using SCILAB 5.5.2. T-test statistics was carried out on predicted and measured mean data: temperature of Trombe wall glaze (TG1), temperature of pebble glaze (TG2), temperature of the pebble bed bin (Tp), temperature of the brooding room (TBr), and temperature of the Trombe wall outer surface (Tw (outer surface))then separated using Levene test for equality. The model... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Computational modeling; Passive Trombe wall solar chick brooder; Simulation; Validation; Poultry production. |
Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6833 |
| |
|
|
Dubois, Rodolphe. |
Bonamia ostreae, l'agent de la bonamiose, est un parasite intracellulaire ayant pour cible les hémocytes (cellules du système de défense) de l'huître plate ostrea edulis. Il induit chez son hôte des lésions branchiales, telles que des perforations ou des indentations pouvant aller jusqu'à la mort du mollusque. Le travail réalisé au cours de ce stage s'inscrivait dans une démarche de validation de méthode de PCR (Polymerase Chain Reaction) pour la détection de ce parasite. Les analyses ont porté sur un lot de trois cent onze huîtres plates ostrea edulis adultes (2-3 ans), issus de captage naturel et provenant de Quiberon (Bretagne). Pour chaque individu, une extraction d'ADN a été réalisée sur un échantillon de coeur et de branchies. Afin de déterminer si... |
Tipo: Text |
Palavras-chave: Bonamia Ostreae; Agent pathogène; Bonamiose; Hémocytes; Huître plate; Ostrea edulis; PCR; Validation. |
Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00369/47989/48017.pdf |
| |
|
| |
|
|
Zielinski,Acácio Antonio Ferreira; Braga,Cíntia Maia; Demiate,Ivo Mottin; Beltrame,Flávio Luís; Nogueira,Alessandro; Wosiacki,Gilvan. |
The sugars in apple juice prove its authenticity and its sensory and nutritional properties. The aim of this study was to develop and validate a simple analytical method using high performance liquid chromatography with refractive index detection (HPLC-RI) to determinate and quantify the sugars sucrose, D-glucose, D-fructose, and D-sorbitol polyol in apple juices, as well as to analyze the juices from the Fuji suprema and Lis Gala cultivars at three ripening stages. The analytical performance parameters evaluated indicated that the method was specific for the compounds analyzed, and the linearity of the calibration curves of sugars showed high correlation coefficients (close to 1.0). The limits of detection and quantification are consistent with... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Soluble carbohydrates; Liquid chromatography; Validation. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000100005 |
| |
|
|
Bandeira,Raquel Duarte da Costa Cunha; Uekane,Thaís Matsue; Cunha,Carolina Passos da; Cunha,Valnei Smarçaro da; Rodrigues,Janaína Marques; Godoy,Ronoel Luiz de Oliveira; la Cruz,Marcus Henrique Campino de. |
A method using Liquid Chromatography Tanden Mass Spectrometry (LC-MS/MS) with matrix-matched calibration curve was developed and validated for determining ochratoxin A (OTA) in green coffee. Linearity was found between 3.0 and 23.0 ng.g-1. Mean recoveries ranged between 90.45% and 108.81%; the relative standard deviation under repeatability and intermediate precision conditions ranged from 5.39% to 9.94% and from 2.20% to 14.34%, respectively. The limits of detection and quantification were 1.2 ng.g-1 and 3.0 ng.g-¹, respectively. The method developed was suitable and contributed to the field of mycotoxin analysis, and it will be used for future production of the Certified Reference Material (CRM) for OTA in coffee. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee; Mycotoxin; Validation; HPLC; MS/MS. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000400021 |
| |
|
| |
Registros recuperados: 61 | |
|
|
|