MIRIAN SOUSDALEFF LACZKOWSKI

Título da Tese: APLICAÇÃO DE MÉTODOS QUIMIOMÉTRICOS NA OTIMIZAÇÃO DA EXTRAÇÃO, AVALIAÇÃO DA ATIVIDADE ANTIOXIDANTE E PRODUÇÃO DE BISCOITOS A PARTIR DE CHIA (Salvia hispanica L.) E CÚRCUMA (Curcuma longa L.).

Orientador: Prof. Dr. Makoto Matsushita

 Data da Defesa: 14/12/2018

RESUMO GERAL

Samples of chia seeds (Salvia hispánica L.) were degreased by cold pressing and the residue obtained named degreased chia seeds (DCS) had the antioxidants extract obtained. A 22 experimental design was employed in order to evaluate the factors ethanol concentration and extraction time. The optimized conditions were extraction time 15 min with ethanol 70% where the activity (RSA), evaluated by the DPPH (2,2-diphenyl-1-picrylhydrazyl) method was 94.76%. For this extract, the total phenolics content was 359.64 mg EGA/100 g. A pseudo-univariate calibration model is proposed as an alternative methodology to determine the %RSA by using the relative concentration from multivariate curve resolution with alternating least squares (MCR-ALS) from near-infrared (NIR) spectra of the antioxidant extract from DCS. The results suggest the possibility of %RSA determination directly from NIR spectra from extracts from DCS by using the multivariate resolution method MCR-ALS.

Artigos Publicados Vinculados a Tese:

https://www.sciencedirect.com/science/article/pii/S0023643818303955?via%3Dihub