| 摘要: |
| 分析了鸡毛菜、易曲凹顶藻热带变种、三叉仙菜、海萝和多管藻（1979 - 1989分别采自广东山东和海南省）未碱处理与碱处理的多糖产率、凝胶强度、粘度、凝固点、融点、硫酸酯和3, 6-内醚-半乳糖含量,同时用红外光谱和13C-核磁共振波谱测定了它们的组成和结构。结果表明它们都具有琼胶的基本结构,鸡毛菜是制造琼胶的很好原料,易曲凹顶藻热带变种也可用于制造琼胶,三叉仙菜是制造低凝固点琼胶的原料。此外还发现海萝和多管藻也有一些凝固性。 |
| 关键词: 红藻 多糖 琼胶 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第2020号。国家自然科学基金资助项目,3870492号 |
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| THE CHEMISTRY OF RED SEAWEED POLYSACCHARIDE I. A STUDY OF FIVE AGAROPHYTES |
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Li Zhien, Shi Shengyao, Huang Jiagang, Xu Zuhong, Liu Wanqing, Guo Yucai, Zhang Xingjun
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Institute of Occanology, Acadcmia Sinica, Qingdau 266071
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| Abstract: |
| The polysaccharide extracts from Pteroclidia tenuis, Laurencia flexilis Setchell var. tropica, Ceramium kondoi, Gloiopeltis furcata and Polysiphonia urceolata were investigated. The yield, gel strength, viscosity, gelation and melting temperature, and contents of sulfate and 3, 6-anhydro-galactose of polysaccharide were analysed. Infrared and 13C-NMR spectroscopy were used to identify their structures.
The results indicated that the polysacchariles from the five red algae species had repeating disaccharide units of agar or masked agar structure. The polysaccharide gel strength from alkali treated (32% NaOH, 30°C, 5 days) L. flexilis var. tropica was high (1%, 424 g/cm2), and that from alkali treated P. tenuis was very high (1%, 697 g/cm2), so these two red algae can be used as raw materials for agar production. The gelation temperature of the polysaccharide from alkaki treated C. kondoi was very low (22.4°C) so C. kondoi can be used to produce agar of low gelation temperature. Polysaccharides extracted from alkali treated G. furcata and P. urceolata showed little gelation ability. |
| Key words: Red seaweed, Polysaccharide, Agarophytes |
