Desorption isotherms of Lactuca sativa seeds
ABSTRACT Lactuca sativa seeds are highly sensitive to climate conditions; thus, they should be stored securely to maintain their qualitative and quantitative characteristics. Studies on hygroscopicity aim to decrease possible changes in agricultural products under specific environmental conditions....
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Universidade Federal de Campina Grande
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| Series: | Revista Brasileira de Engenharia Agrícola e Ambiental |
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| author | Juliana S. Zeymer Paulo C. Corrêa Gabriel H. H. de Oliveira Fernanda M. Baptestini Rita C. P. Freitas |
| author_facet | Juliana S. Zeymer Paulo C. Corrêa Gabriel H. H. de Oliveira Fernanda M. Baptestini Rita C. P. Freitas |
| author_sort | Juliana S. Zeymer |
| collection | DOAJ |
| description | ABSTRACT Lactuca sativa seeds are highly sensitive to climate conditions; thus, they should be stored securely to maintain their qualitative and quantitative characteristics. Studies on hygroscopicity aim to decrease possible changes in agricultural products under specific environmental conditions. Accordingly, this study aims to develop an appropriate mathematical model to represent the desorption isotherms of Lactuca sativa seeds. The hygroscopic equilibrium was achieved using a static-gravimetric method at temperatures of 10, 20, 30, 40 and 50 °C and water activity in the range 0.11-0.96. Six mathematical models were fitted to the experimental data of the equilibrium moisture content of Lactuca sativa seeds. The best model was chosen based on the determination coefficient (R2), magnitude of mean relative error (MRE), standard deviation of the estimate (SDE), and analysis of residue distribution. The modified Oswin model best represented the hygroscopicity of the Lactuca sativa seeds, with values of 8.02% and 0.55 for the MRE and SDE, respectively; moreover, the residual values were randomly distributed. The shape of the isotherms of the Lactuca sativa seeds estimated using the modified Oswin model is sigmoidal, which is characteristic of a type II curve. |
| format | Article |
| id | doaj-art-c5ae079a452340f292a3d3dc49b59cc9 |
| institution | OA Journals |
| issn | 1807-1929 |
| language | English |
| publisher | Universidade Federal de Campina Grande |
| record_format | Article |
| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-c5ae079a452340f292a3d3dc49b59cc92025-08-20T02:25:51ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-192921856857210.1590/1807-1929/agriambi.v21n8p568-572S1415-43662017000800568Desorption isotherms of Lactuca sativa seedsJuliana S. ZeymerPaulo C. CorrêaGabriel H. H. de OliveiraFernanda M. BaptestiniRita C. P. FreitasABSTRACT Lactuca sativa seeds are highly sensitive to climate conditions; thus, they should be stored securely to maintain their qualitative and quantitative characteristics. Studies on hygroscopicity aim to decrease possible changes in agricultural products under specific environmental conditions. Accordingly, this study aims to develop an appropriate mathematical model to represent the desorption isotherms of Lactuca sativa seeds. The hygroscopic equilibrium was achieved using a static-gravimetric method at temperatures of 10, 20, 30, 40 and 50 °C and water activity in the range 0.11-0.96. Six mathematical models were fitted to the experimental data of the equilibrium moisture content of Lactuca sativa seeds. The best model was chosen based on the determination coefficient (R2), magnitude of mean relative error (MRE), standard deviation of the estimate (SDE), and analysis of residue distribution. The modified Oswin model best represented the hygroscopicity of the Lactuca sativa seeds, with values of 8.02% and 0.55 for the MRE and SDE, respectively; moreover, the residual values were randomly distributed. The shape of the isotherms of the Lactuca sativa seeds estimated using the modified Oswin model is sigmoidal, which is characteristic of a type II curve.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000800568&lng=en&tlng=enmathematical modelinghygroscopic equilibriumrelative humiditytemperature |
| spellingShingle | Juliana S. Zeymer Paulo C. Corrêa Gabriel H. H. de Oliveira Fernanda M. Baptestini Rita C. P. Freitas Desorption isotherms of Lactuca sativa seeds Revista Brasileira de Engenharia Agrícola e Ambiental mathematical modeling hygroscopic equilibrium relative humidity temperature |
| title | Desorption isotherms of Lactuca sativa seeds |
| title_full | Desorption isotherms of Lactuca sativa seeds |
| title_fullStr | Desorption isotherms of Lactuca sativa seeds |
| title_full_unstemmed | Desorption isotherms of Lactuca sativa seeds |
| title_short | Desorption isotherms of Lactuca sativa seeds |
| title_sort | desorption isotherms of lactuca sativa seeds |
| topic | mathematical modeling hygroscopic equilibrium relative humidity temperature |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000800568&lng=en&tlng=en |
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