Hassan Mirhojati; Parvin Sharayei; Reihaneh Ahmadzadeh Ghavidel
Abstract
The acidified ethanol extracts of dried barberry which have a relatively high anthocyanin content (376.28± 1.45 mg c3g/Kg dmp) were freeze dried using maltodextrin (MDX), polyvinyl-pyrrolidone (PVP) and mixture of MDX and calcium alginate (MDX-CaAlg) as a carrier and coating agents. The qualitative ...
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The acidified ethanol extracts of dried barberry which have a relatively high anthocyanin content (376.28± 1.45 mg c3g/Kg dmp) were freeze dried using maltodextrin (MDX), polyvinyl-pyrrolidone (PVP) and mixture of MDX and calcium alginate (MDX-CaAlg) as a carrier and coating agents. The qualitative attributes of the powders were characterized by their productively encapsulation efficiency, moisture content, bulk density, colour values (L*, a*, b*, C and H° ), particle size, total phenolic compounds (TPC), free radical scavenging activity of DPPH (RSA), ferric reducing-antioxidant power (FRAP) and minimized 50% of radical- scavenging activity (IC50). Scanning electron microscope was used for monitoring the structures of the powders. To determine the stability and half- life period of microencapsulated pigments, samples were stored under different storage temperatures (4◦C and 25◦C) at relative humidity 75%. Results showed that the encapsulated powder containing PVP 8% as wall material represented the best powder quality (p
Roksaneh Rouhani; Soudabeh Einafshar; Reihaneh Ahmadzadeh Ghavidel
Abstract
Sepals and petals are byproducts from saffron production process that waste without any use in Iran. These byproducts containing a lot of anthocyanin and natural antioxidants.The aim of this study is determine efficiency of extraction and measurement of antioxidant activity and anthocyanin pigments of ...
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Sepals and petals are byproducts from saffron production process that waste without any use in Iran. These byproducts containing a lot of anthocyanin and natural antioxidants.The aim of this study is determine efficiency of extraction and measurement of antioxidant activity and anthocyanin pigments of pollen and anther of saffron flower ,using mixed solvent of ethanol and hydrochloridic acid 1.5 N (85:15) by ultrasonic waves. Therefore, the time factors (5, 15, 25 minutes) and sound intensity (20, 60 and 100%) were usedThe results showed that the most efficient extraction of samples (54/48%) was extracted in 15 minute and 100% of sound intensity, and the maximum measure of anthocyanin compounds (48.83 mg/ml), total phenolic compounds (36.54 mg/ml), power of reviving the anti-radical DPPH activity of the extracts (335.7 mg/ml) and the power of scavenging Fe III (431.1µmol/lit Fe III), the best sample in all of the exams was extracted in 10 minutes and 100% of sound intensity. So, the optimized situation for extraction of anthocyanin compounds by ultrasound waves was time 15 min and 100% about sound intensity.
