Acetylated alginates, and method for producing acetylated algina

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C08B 3704

Patent

active

054441609

ABSTRACT:
A novel method of biosynthetically acetylating seaweed alginates by modification with certain Pseudomonas syringae, such as P. syringae subsp. phaseolicola, is disclosed. The acetylated seaweed alginates thus produced are also novel. Acetylation occurs almost entirely in the O-2 and O-3 positions of the mannuronic acid residues. The acetylated alginates have several desirable properties. For example, acetylation increases the polymers' viscosity; it increases the flexibility of their gels; and it can produce a strong, thermoreversible-gel network. Acetylation increases the viscosity of the polymer, decreases ion-binding capacity, and decreases the ability to gel with calcium. The degree of acetylation can be controlled by controlling the exposure time, which allows the properties of the resulting polymer to be custom-made. Thus the properties of the polymer can be tailored to the intended end-use.

REFERENCES:
patent: 3856625 (1974-12-01), Imrie
patent: 3905869 (1975-09-01), Hidaka et al.
patent: 4235966 (1980-11-01), Jarman et al.
patent: 4490467 (1984-12-01), Jarman et al.
Gross et al., "Studies on the Extracellular Polysaccharides (EPS) Produced in vitro by Pseudomonas phaseolicola. II. Characterization of Levan, Alginate, and `LPS`," J. Phytopathol., vol. 119, No. 3, pp. 206-215 (1987).
Skj.ang.k-Br k et al., "Selective Acetylation of Mannuronic Acid Residues in Calcium Alginate Gels," Carbohydrate Research, vol. 185, pp. 119-129 (1989).
Gross et al., "Demonstration of Levan and Alginate in Bean Plants (Phaseolus vulgaris) Infected by Pseudomonas syringae pv. phaseolicola," J. Phytopathol., vol. 120, No. 1, pp. 9-19 (1987).
Skj.ang.k-Br k et al., "Monomer Sequence and Acetylation Pattern in Some Bacterial Alginates," Carbohydrate Research, vol. 154, pp. 239-250 (1986).
Gross et al., "Studies on the Extracellular Polysaccharides (EPS) Produced in vitro by Pseudomonas phaseolicola. I. Indications for a Polysaccharide Resembling Alginic Acid in Seven P. syringae Pathovars," J. Phytopathol. vol. 118, No. 3, pp. 276-287 (1987).
Pindar et al., "The Biosynthesis of Alginic Acid by Azotobacter vinelandii," Biochem. J., vol. 152, pp. 616-622 (1975).
Gross et al., "Studies on the Extracellular Polysaccharides (EPS) Produced in vitro by Pseudomonas phaseolicola. III. Kinetics of Levan and Alginate Formation in Batch Culture and Demonstration of Levansucrase Activity in Crude EPS," J. Phytopathol., vol. 119, No. 4, pp. 289-297 (1987).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Acetylated alginates, and method for producing acetylated algina does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acetylated alginates, and method for producing acetylated algina, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acetylated alginates, and method for producing acetylated algina will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2142664

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.