Ciência e Agrotecnologia | |
Granules morphology and rheological behavior of green banana (Musa cavendishii) and corn (Zea mays) starch gels | |
Dayane Rosalyn Izidoro2  Bogdan Demczuk Junior2  Charles Windson Isidoro Haminiuk1  Maria Rita Sierakowski2  Renato João Sossela De Freitas2  Agnes De Paula Scheer2  | |
[1] ,Universidade Federal do Paraná Centro Politécnico Setor de TecnologiaCuritiba PR | |
关键词: Starch; green banana; corn; microscopy; rheology; Amido; banana verde; milho; microscopia; reologia; | |
DOI : 10.1590/S1413-70542007000500026 | |
来源: SciELO | |
【 摘 要 】
In this work, it was used starch obtained from green banana (Musa cavendishii) and commercial corn (Zea mays) starch in order to compare the granule morphology and the rheological behavior of these gel-starches. Images of starch granules morphology were obtained from scanning electron microscope (SEM). The banana starch granules presented an oval and ellipsoidal shape with irregular diameters. Neverthless, the granules of corn starch showed a poliedric shape, with different sizes. The rheological behavior of gel starch solutions showed a non-newtonian character with a pseudoplastic behavior. Herschel-Bulkley model gave a good description on the rheological behavior of the gel starch. Banana gel-starch solutions showed higher values of shear stress and apparent viscosity when compared with corn gel-starch solutions. A progressive decrease in shear stress and viscosity occurred with the addition of sodium chloride and sucrose.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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