摘要
从石楠叶片提取分离红色素,研究其稳定性、抗氧化性和抑菌性。结果表明:石楠叶片红色素耐pH小于4的酸性和60℃以下温度,并具有一定的耐光性。它能有效清除系统中的羟基自由基和超氧阴离子,且清除效果与红色素质量浓度正相关。在石楠叶片红色素质量浓度为0.32 mg/mL时,对羟基自由基和超氧阴离子的清除率可分别达到89.66%和74.71%。石楠叶片红色素的抑菌性从大到小依次为大肠杆菌、枯草芽孢杆菌和金黄色葡萄球菌,且质量浓度越大,抑菌性越强。石楠叶片红色素具有一定的稳定性、较强的抗氧化性与抑菌性。
The objective of this manuscript is to determine and analysis the stability and antioxidant activity and antibacterial activity of the pigment from the leaf of Photinia serrulata. The experiment results demonstrate that this kind of pigment is stable under acidic conditions and 60 ℃ and poor light. The pigment has strong reduction and is able to effectively scavenge hydroxyl radical and superanion radical in vitro. Moreover,its scavenging effect has positive correlation with the pigment concentration. When the pigment is at the concentration of 0.32 mg/mL,the hydroxyl radical and superanion radical eradication rates are 89.66% and 74.71%. The antibacterial effect of pigment was different on three tested strains,in turn,Escherichia coil,Bacillus s ubtilis ,Staphyloccus aureus Escherichia coll. The higher the concentration was,the stronger the antibacterial was. In conclusion,the pigment is relatively stable and the pigment has strong antioxidant activity and antibacterial activity.
出处
《食品与生物技术学报》
CAS
CSCD
北大核心
2013年第9期978-982,共5页
Journal of Food Science and Biotechnology
基金
中央财政支持地方高校发展专项(CXTD33)
关键词
石楠
叶片红色素
稳定性
抗氧化性
抑菌性
Photinia serrulata, pigment, stability, antioxidantion, antibacterial
