Durango ÁES, Gallardo CC, Contreras CA

Language: Spanish
References: 19
Page: 535-542
PDF size: 116.21 Kb.

ABSTRACT

Introduction: the use of agro-industrial wastes is a practice that has been implemented by the environmental impact it represents.
Objective: to perform a bromatological and phytochemical analysis of Guadua leaves and to evaluate the effect of some variables involved in the process of obtaining plant material that may affect the yield and the antioxidant activity of hydroalcoholic extract.
Methods: secondary metabolites in the leaves were qualitatively identified and then supplemented with bromatologic study according to AOAC standards. Through a simple comparison designs and factorial design 22, there was determined the influence of the drying process (natural and controlled), the particle size (120 and 64 µm), crop age (3-4 years) and storage time of the dried and ground leaves (1 and 6 months) on the extraction yield and antioxidant activity (DPPH Folin and Ciocalteu) of hydroalcoholic extract.
Results: dried leaves revealed the presence of compounds with antioxidant activity (flavonoids and phenols) and 2,4% nitrogen less than reported for other bamboo trees. From the leaves, one can obtain a hydroalcoholic extract with yield up to 10,6% and antioxidant activity up to 9,2 mg gallic acid/100g and Trolox 14,5 mg/100g. It was observed that neither age of the cultures (3-4 years) from leaves, the drying method, nor the time storage of leaves affect antioxidant properties and the extraction yield of hydroalcoholic extract, whereas these properties did change with the particle size.
Conclusions: Guadua leaves, for their antioxidant activity, are a potential raw material for use in the cosmetics industry.

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