Full
Outline
To explore the effects of classification methods on the structural characteristics and antioxidant activity of Antarctic krill chitin.
Taking Antarctic krill chitin as the research object, the structure of Antarctic krill chitin was characterized by scanning electron microscope, Fourier transform infrared spectrum, thermogravimetric analysis and X-ray diffraction analysis, and its antioxidant activity was evaluated.
The source and classification of Antarctic krill meal affected the yield of chitin. It was found that in the infrared spectrum of chitin extracted from Antarctic krill meal B, C and E, the amide I band split into 2 separation peaks, while the amide II band appeared at 1558 cm–1. The results of thermal stability analysis showed that the degradation of the extracted chitin structure could be divided into 3 stages. In the first stage, it was found that all of them would lose weight at a temperature below 100 ℃; in the second stage, the degradation started at 239 ℃, and the maximum loss occurred above 400 ℃; in the third stage, almost complete denaturation of chitin was observed at 550 ℃. The results of X-ray diffraction analysis showed that the X-ray diffraction spectrum of Antarctic krill chitin had 2 sharp peaks and 4 weak peaks, the main peaks (2θ) were around 9° and 19°, and the weak peaks were around 12°, 23° and 39°.
The results demonstrates that the antioxidant activity of Antarctic krill chitin with different sources and particle sizes is different, and the antioxidant activity shows a dose-dependent relationship. The research shows that Antarctic krill chitin and its derivatives have good functional characteristics, and it is expected that it will have a wider application fields and application prospect.
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| 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 |
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