옻씨 추출물의 항산화 활성과 옻씨 추출물을 첨가한 발효유의 품질특성
Antioxidant activities of Rhus verniciflua seed extract and quality characteristics of fermented milk containing Rhus verniciflua seed extract
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This study was carried out to investigate the quality characteristics of fermented milk containing Rhus verniciflua seed (RVS) extracts (0.0%, 0.1%, 0.3% and 0.5%) and antioxidant activity of RVS extracts. The proximate composition of RVS was moisture (4.76%), crude ash (1.40%), crude fat (5.33%) and crude protein (11.10%). A total polyphenol content of 70% ethanol extract of RVS (554±2.64 mg/g) was higher than that of RVS water extract (145±3.47 mg/g). 70% ethanol extract (1103±6.42 mg/g) of RVS showed higher content in the total flavonoids (37±2.30 mg/g) and activities on DPPH free radical scavenging (73.23%) and ABTS free radical scavenging (83.47%) when compared with water extracted of RVS. The quality characteristics, such as pH, titratable acidity, and the number of lactic acid producing bacteria were not remarkably different between the fermented milk samples subjected to treatments with and without the addition of RVS extracts.
Abstract
This study was carried out to investigate the quality characteristics of fermented milk containing Rhus verniciflua seed (RVS) extracts (0.0%, 0.1%, 0.3% and 0.5%) and antioxidant activity of RVS extracts. The proximate composition of RVS was moisture (4.76%), crude ash (1.40%), crude fat (5.33%) and crude protein (11.10%). A total polyphenol content of 70% ethanol extract of RVS (554±2.64 mg/g) was higher than that of RVS water extract (145±3.47 mg/g). 70% ethanol extract (1103±6.42 mg/g) of RVS showed higher content in the total flavonoids (37±2.30 mg/g) and activities on DPPH free radical scavenging (73.23%) and ABTS free radical scavenging (83.47%) when compared with water extracted of RVS. The quality characteristics, such as pH, titratable acidity, and the number of lactic acid producing bacteria were not remarkably different between the fermented milk samples subjected to treatments with and without the addition of RVS extracts.
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