Corn starch systems as carriers for yerba mate (Ilex paraguariensis) antioxidants

Corn starch systems as carriers for yerba mate (Ilex paraguariensis) antioxidants: Effect of mineral addition

“…3). These results confirmed the observations found when surface area and pore size distribution of starch carriers were analyzed by different techniques (nitrogen adsorption/desorption isotherms and confocal laser scanning microscopy) (Deladino et al, 2014). An increased exposed surface area suggests higher potential binding sites (Fernández et al, 2008), which could be occupied by active compounds like minerals and antioxidants.…”

“…When analyzing polyphenol composition, all samples had the same relative amounts of the different polyphenols chlorogenic acid esters (55%): chlorogenic acid isomers (27%): chlorogenic acid (8%): rutin (10%). The same relationship was found for yerba mate lyophilized extracts (Deladino et al, 2014).…”

“…Moreover, this effect was more marked in HPS* ZnMgY samples when both zinc and magnesium were combined with yerba mate extract under pressure. In a previous work (Deladino et al, 2014) HPS* samples gave the highest values of polyphenol content when the starches were loaded with only yerba mate extract. These results confirm the hypothesis that minerals, instead of yerba mate, would occupy free sites of the starch granule when both of these compounds simultaneously undergo the high pressure treatment.…”

“…Carrier systems were either native corn starch (S) (Molinos Río de La Plata, Argentina) or high pressure treated starch (HPS) as described in previous studies (Deladino et al, 2014). High pressure starches were obtained by suspending 10 g/100 mL of the aforesaid starch in deionized water (Milli-Q, Millipore Inc. Bedford, MA, USA).…”

“…In a previous work (Deladino et al, 2014), native and high pressure treated corn starches were used as suitable carriers for natural antioxidants of yerba mate extracts. The present work is focused on the ability of these starches to also bind zinc and magnesium salts, either alone or mixed with yerba mate extracts.…”