Enhancing the Antioxidant Activity of Alginic Acid Extracted from Sargassum Angustifolium Brown Algae Based on Optimizing the Extraction

被引:0
|
作者
Kolahdoozan, Melika [1 ]
Mousavi, Seyed Erfan [2 ]
Hatamipour, Mohammad Sadegh [2 ]
Yegdaneh, Afsaneh [3 ]
机构
[1] Isfahan Univ Med Sci, Pharm Student Res Comm, Sch Pharm, Dept Pharmacognosy, Esfahan, Iran
[2] Univ Isfahan, Fac Engn, Dept Chem Engn, Esfahan, Iran
[3] Isfahan Univ Med Sci, Sch Pharm & Pharmaceut Sci, Dept Pharmacognosy, Esfahan, Iran
来源
ADVANCED BIOMEDICAL RESEARCH | 2024年 / 13卷 / 01期
关键词
Alginic acid; antioxidant activity; brown alga; polysaccharide; sargassum; ULTRASOUND-ASSISTED EXTRACTION; ASCOPHYLLUM-NODOSUM;
D O I
10.4103/abr.abr_491_23
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
Background:Researchers are always searching for chemicals with antioxidant properties. The cell wall polysaccharide of Sargassum angustifolium consists of alginic acid. To use this polysaccharide and investigate on its various effects, it must first be isolated from brown algae and the operational parameters of extraction need to be optimized to reach the maximum antioxidant effect. Materials and Methods:The effects of changing the parameters (temperature, time, and power of ultrasonic waves) used in the extraction of alginic acid were discussed based on changes in the antioxidant effect. After that, M/G (beta-D-mannuronic acid to alpha-L-guluronic acid ratio) was measured using 1H NMR spectra, and the antioxidant activity of the extracted alginic acid was examined using the DPPH method. Results:The highest antioxidant effect was observed in sample No. 4 with an extraction temperature of 65 degrees C, extraction duration of 25 min, and 640 W of ultrasonication power, whereas the lowest antioxidant effect was observed in sample No. 7 at 45 degrees C, 20 min, and 480 W. Conclusion:Structural changes due to increasing temperature may cause less activity, whereas the optimum temperature was 65 degrees C. There was no direct relationship between M/G and IC50, and it should be examined along with molecular weight. Increasing the intensity of the waves increased the antioxidant activity. The extraction yield can be increased by increasing A/W (Gram of algal sample per mL of solvent). It appears that the extraction under optimum conditions enhances the MM block epimer, which may lead to an increase in the antioxidant activity.
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页数:5
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