Retention of Bioactive Compounds During Domestic Processing of Croatian Domestic Garlic (Allium sativum L.)
1Faculty of Food Technology and Biotechnology, University of Zagreb, Petra Kasandrića 3, HR-23000 Zadar, Croatia
2Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia
Received: 6 February 2018
Accepted: 4 October 2018
Croatian domestic garlic, thermal treatment, domestic processing, bioactive compounds, antioxidant activity
The content of bioactive compounds and antioxidant activity were determined in Croatian domestic garlic after domestic processing (crushing, water blanching and frying) through different thermal treatments. The predominant phenolics in fresh garlic expressed per fresh mass were p-coumaric (10.79 mg/100 g) and caffeic (9.50 mg/100 g) acids, while the most abundant organosulfur compounds were methylsulfinylsulfanylmethane (9881.84 mg/100 g), 3-methylsulfinylsulfanylprop-1-ene and 3-methylsulfanylsulfinylprop-1-ene (257.59 mg/100 g) and allicin (185.62 mg/100 g). The highest total phenolic content and antioxidant activity were determined in fresh garlic followed by crushed, blanched and fried garlic, while organosulfur content increased after shorter thermal treatment. As time of treatment increased, frying showed the most pronounced losses of garlic total phenolic acids (in the range from 19.47 to 37.93 %) and blanching of organosulfur content (about 25 %). The blanching and frying significantly reduced allicin content, while S-methyl methanesulfinothioate was more stable.
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