Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7062451 | Thermochimica Acta | 2013 | 6 Pages |
Abstract
Germplasm is a source of genetic variability available for plant breeding. These techniques have become accessible and necessary to protect biological diversity. The collections are groups of representative genotypes with the genetic variability of the species that is the object of conservation. Four samples of pinhão, obtained from Paraná pine seeds, were supplied by EMBRAPA Florestas (germplasm bank). Starch was carefully extracted in aqueous solution, whose yield was around 32.5%. For each sample the gelatinisation temperature (Tp) occurred below 63.6 °C and gelatinisation enthalpy (ÎHgel) was different for each sample. TG-DTA curves showed similarity, although with mass losses and peaks at different temperatures. The pasting temperature obtained by RVA was directly proportional to the onset and peak temperatures obtained by DSC. The XRD technique allowed the degree of relative crystallinity to be calculated for each sample. From the results it can be verified that each sample had specific characteristics.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Fernanda Janaina Oliveira Gomes da Costa, Carolina Lopes Leivas, Nina Waszczynskyj, Rossana Catie Bueno de Godoi, Cristiane Vieira Helm, Tiago André Denck Colman, Egon Schnitzler,