Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1994-04-26
1995-08-22
Nutter, Nathan M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
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.
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Day Donal F.
Lee Jin W.
Board of Supervisors of Louisiana State University and Agricultu
Nutter Nathan M.
Runnels John H.
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