Effect of different cooking conditions on phenolic compounds and antioxidant capacity of some selected Brazilian bean (Phaseolus vulgaris L.) cultivars.
The effects of different cooking conditions such as soaking, atmospheric (100 degrees C) or pressure boiling (121 degrees C), and draining of cooking water following thermal treatment on phenolic compounds and the DPPH radical scavenging capacity from two selected Brazilian bean cultivars (black and yellow-brown seed coat color) were investigated using a factorial design (2(3)). Factors that significantly reduced the total phenolic contents and antioxidant capacity in both cultivars were the soaking and draining stage. Independent of cooking temperature, total phenolics and antioxidant capacities were enhanced in treatments without soaking and where cooking water was not discarded, and this was likely linked to an increase of specific phenolic compounds detected by high performance liquid chromatography such as flavonols and free phenolic acids in both cultivars. Cooking of beans either at 100 or 121 degrees C, without a soaking stage and keeping the cooking water, would be recommendable for retaining antioxidant phenolic compounds.
Ranilla
Lena Gálvez
LG
Departamento de Alimentos e Nutrição Experimental, Laboratorio de Química, Bioquímica e Biologia Molecular de Alimentos, FCF, Universidade de São Paulo, São Paulo, Brazil.
Genovese
Maria Inés
MI
Lajolo
Franco Maria
FM
D000975:Antioxidants / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis; D005511:Food Handling / Q000379:methods*; D006358:Hot Temperature; D027805:Phaseolus / Q000737:chemistry*; D010636:Phenols / Q000032:analysis*; D011312:Pressure; D013045:Species Specificity; D014867:Water
D000975:Antioxidants; D005419:Flavonoids; D010636:Phenols; D014867:Water