Author(s): Bui Tran Nu Thanh Viet, Dang Thi To Uyen, Nguyen Hong Ngan, Phan Thi Phuong, Vo Thi Kim Lai
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 5 - Issue. 06 , June - 2016
Present study includes extraction and antioxidant properties of polysaccharide from Longan (Dimocarpus longan Lour) seed. The polysaccharide from longan seed (PL) was extracted by hot water, complex enzymes and the microwave-assisted systems. The antioxidant activites of PL were determined by using various test methods, including scavenging of hydroxyl radicals, 2,2-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenging activity, chelating ability on ferrous ions. The data showed that the highest yield of polysaccharide from longan seed was achieved with enzyme extraction (51 %). There was no significant difference in yield of PL extracted by microwave assisted and hot water. The three PL extracts have effective free radical scavenging, hydroxyl radical scavenging, and scavenging on ferrous ions. This antioxidant capacities depends on concentration and increasing with increased amount of sample. This results indicate that polysaccharides from longan seed can be obtained to use as a natural antioxidants.
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