کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1231306 1495254 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The pretreatment effects on the antioxidant activity of jujube polysaccharides
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
The pretreatment effects on the antioxidant activity of jujube polysaccharides
چکیده انگلیسی


• Different extraction methods affected the antioxidant activity differently.
• Power was the key parameter in ultrasonic and microwave extraction.
• Powers of 300 W and 600 W were two critical points in microwave extraction.
• Sevag reagent combined with H2O2 was best for protein and pigment removal.

Pretreatment is vital to keep the bioactivities of polysaccharides. In this paper, the effects of hot water, ultrasonic and microwave extraction, as well as the effects of protein and pigment removal steps, on the antioxidant activity of water soluble polysaccharides in jujube (WSPJ) were studied. Hydroxyl free radical (OH) scavenging activity was adopted to determine the antioxidant activity of WSPJ. The results showed that OH scavenging activity of WSPJ extracted by ultrasonic wave was higher than that extracted by hot water and by microwave. Furthermore, power parameter in both ultrasonic and microwave extraction affected the OH scavenging activity dramatically. On the other hand, Sevag reagent was better than trichloroacetic acid (TCA), TCA with 1-butanol (TCA-B) and hydrochloric acid for protein removal, and H2O2 was better than active carbon for pigment removal to keep the antioxidant activity of WSPJ.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 114, October 2013, Pages 339–343
نویسندگان
, , , , ,