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Algal polysaccharide production

阅读:842发布:2022-05-14

专利汇可以提供Algal polysaccharide production专利检索,专利查询,专利分析的服务。并且Selected polysaccharides are produced from algal plant tissue by (a) separating vegetative parts or spores into (i) gametophytes, or (ii) tetrasporophytes; (b) vegetatively propagating the separated plant material; (c) harvesting the resulting plant growth; and (d) recovering the desired polysaccharides from the harvested material. Different specific polysaccharides (e.g., kappa- or lambda-carrageenan) have been found to be produced by (i) or (ii) above. This method avoids difficult post-harvest separations and is amenable to controlled vegetative propagation of the separated plant material under optimum conditions.,下面是Algal polysaccharide production专利的具体信息内容。

1. A METHOD FOR THE PRODUCTION OF SPECIFIC POLYSACCHARIDE FROM SELECTED ALGAL SPECIES PRODUCING THE DESIRED POLYSACCHARIDE, COMPRISING: A. PROVIDING VEGATATIVE PARTS OR SPORES SEPARATED INTO I. GAMETOPHYTES, OR II. TETRASPOROPHYTES, B. VEGETATIVELY PROPAGATING THE SEGREGATED PLANT MATERIAL, C. HARVESTING THE PLANT GROWTH, AND D. RECOVERING THE DESIRED POLYSACCHARIDES FROM THE HARVESTED PLANTS.
2. The method of claim 1 wherein the polysaccharides are carrageenans and the algal strains are marine algae known to produce carrageenans.
3. The method of claim 2 wherein the strains are selected from species of the following genera: Chondrus, and Gigartina.
4. The method of claim 3 wherein the species are Chondrus crispus or Gigartina stellata.
5. The method of claim 2 wherein gametophytes are vegetatively propagated and kappa -carrageenan is recovered.
6. The method of claim 2 wherein tetrasporic algae are vegetatively propagated and lambda -carrageenan is recovered.
7. The method of claim 1 wherein the vegetative propagation is carried out by: i. providing seawater at a temperature suitable for the growth of the algae, as growth medium, ii. maintaining the pH in said seawater between approximately pH 6.5 to 8.5 by CO2 addition, and iii. maintaining the presence of assimilable nitrogen-source material to permit vigorous vegetative growth in the seawater system until shortly before harvesting.
8. The method of claim 7 wherein during a short period before harvesting no additional N-source material is supplied and the plant material is subject to strong illumination.
9. The method of claim 7 wherein fresh seawater is regularly supplied to the growth medium.
10. The method of claim 7 wherein the concentration of nitrogen-source material is maintained by continuously or intermittently supplying fixed nitrogen during the vigorous growth stage and then is allowed to become substantially exhausted for approximately 2 - 3 weeks before harvest.
11. The method of claim 10 wherein during said 2 - 3 week period the plants are subject to strong illumination sufficient to substantially decolorize the alga resulting in an improved polysaccharide material.
12. The method of claim 1 wherein different types of polysaccharides are recovered from (i) and (ii) in separate growth areas and blended to produce a desired polysaccharide mixture.
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