The effect of acid hydrolysis on the technological functional properties of pinhão (Araucaria brasiliensis) starch

Food Science and Technology (Campinas)

Roberta Cruz Silveira Thys²  Andréia Gomes Aires²  Ligia Damasceno Ferreira Marczak¹  Caciano Pelayo Zapata Noreña² 

[1] ,Federal University of Rio Grande do Sul Institute of Food Science and Technology Porto Alegre RS ,Brazil

关键词: unconventional starch source;    modified starch;    fat substitutes;    fonte de amido não convencional;    amido modificado;    substituto de gordura;   

DOI  :  10.1590/S0101-20612013000500014

来源: SciELO

【 摘 要 】

Technological functional properties of native and acid-thinned pinhão (seeds of Araucária angustifolia, Brazilian pine) starches were evaluated and compared to those of native and acid-thinned corn starches. The starches were hydrolyzed (3.2 mol.L-1 HCl, 44 ºC, 6 hours) and evaluated before and after the hydrolysis reaction in terms of formation, melting point and thermo-reversibility of gel starches, retrogradation (in a 30-day period and measurements every three days), paste freezing and thawing stability (after six freezing and thawing cycles), swelling power, and solubility. The results of light transmittance (%) of pastes of native and acid-thinned pinhão starches was higher (lower tendency to retrogradation) than that obtained for corn starches after similar storage period. Native pinhão starch (NPS) presented lower syneresis than native corn starch (NCS) when submitted to freeze-thaw cycles. The acid hydrolysis increased the syneresis of the two native varieties under storage at 5 ºC and after freezing and thawing cycles. The solubility of NPS was lower than that of native corn starch at 25, 50, and 70 ºC. However, for the acid-thinned pinhão starch (APS), this property was significantly higher (p < 0.05) when compared to that of acid-thinned corn starch (ACS). From the results obtained, it can be said that the acid treatment was efficient in producing a potential fat substitute from pinhão starch variety, but this ability must be further investigated.

【 授权许可】

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