PDF
Full
Outline
Objective To optimize the mixed acid extraction process of pectin from Akebia trifoliate peel and evaluate the structure, and antioxidant properties of pectin. Methods Using Akebia trifoliate peel as raw material, which was extracted by the mixed acids hydrolysis. The effects of the types of inorganic acids, the volume ratio of the mixed acid, solid-to-liquid ratio, pH, extraction time and temperature were studied, and Box-Behnken response surface method was used to optimize the extraction process parameters on the basis of single factor experiment. The structure of the peel pectin of Akebia trifoliate obtained under the optimal extraction conditions was characterized by ultraviolet-visible spectroscopy (UV-Vis) and Fourier transform infrared spectroscopy (FT-IR), and its antioxidant activity was investigated. Results The optimal extraction conditions were: The volume ratio of the mixed acid [V(citric acid):V(sulfuric acid)] 2:1, solid-to-liquid ratio 1:30 (g:mL), pH value 1.0, extraction time 2.0 h and temperature 94 ℃, and the extraction rate reached 14.22%, which were about 1.24% and 4.17% increase compared with single sulfuric acid and citric acid, respectively. FT-IR showed that the absorption peaks of sulfuric acid and citric acid extraction of pectin (CSEP) were more consistent with its structural characteristics than sulfuric acid extraction of pectin (SEP) and citric acid extraction of pectin (CEP) at 1754 cm-1 and 1624 cm-1, and its content of galacturonic acid (81.94%) and degree of esterification (82.41%) more higher. CSEP own superior antioxidant biological activity, and the half maximal inhibitory concentration (IC50) for hydroxyl radical of CSEP was lower than that of commercial pectin (CP), which were 2.248 mg/mL and 4.114 mg/mL, respectively. Conclusion Using the mixed acid to extract pectin from Akebia trifoliata peel has good improved on extraction rate, content of galacturonic acid and antioxidant activity.
PDF
142
53
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
