Estudo das características estruturais e das propriedades funcionais do amido de sementes de jaca (Artocarpushete-rophylusLam) variedades mole e dura.

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

16/09/2012

RESUMO

Starch is a polysaccharide used as a source of carbohydrates in the human diet, with wide application in food industry, textile and pharmaceutical industries. The search for new sources starch is growing, causing the production sector is seeking new technologies, as well as natural starches with different chemical and physical characteristics. The objective of this study was to extract and characterize starch from jackfruit seeds, varieties of soft and hard, as their chemical, structural and morphological, thermo-economic and technological. In proxi-mate analysis of starch extracted from jackfruit seeds had a content of 92.81% to 94.49% range for soft and hard variety, thus verifying a high purity in the extraction process. The ob-servation in scanning electron microscopy and optical microscopy showed starch granules with rounded shape, the bell-shaped and some go-presenting regular cuts in its surface, diam-eters ranging from 6 to 11μm-jackfruit soft and lasts for 6-13 μm. The pattern of crystallinity shown by X-ray diffraction for the two varieties was type A. The swelling power and solubili-ty of starches studied increased with increasing temperature, being significantly above the temperature of 75 ˚ C (gelatinisation). Absorption capacity for water and oil, starch of the present study showed a high absorption, and the soft jackfruit obtained the highest values, 123.18 g 100g-1 and 99.58 g 100g-1. The starch gel showed low transmittance values, with folders for the kid-opaque. The maximum viscosity of starch from jackfruit seed of the varie-ty found hard was higher for the variety of soft starch, and starch of the variety you lasts less resistant to mechanical agitation at high temperature (higher breakdown). In Differential Scanning Calorimetry (DSC) showed an initial gelatinization temperature of 36 ˚C and a final temperature of 65 ˚ C for soft jackfruit and jackfruit was last of 40 ˚C and 70 ˚C respectively.

ASSUNTO(S)

propriedades funcionais amido semente de jaca alimentos jackfruit seed starch functional properties

ACESSO AO ARTIGO

Documentos Relacionados