A concentrated solution of a polyglucosamine such as chitin or chitosan is prepared by forming an aqueous slurry of said polyglucosamine with a peroxide, and adding copper ion to said slurry so as to solubulize said polyglucosamine.

 
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< Gelling agents or thickeners

< Nucleotide sequences which code for the cstA gene

> Ligation method and reagents to form an amide bond

> Non-aggregating non-quenching oligomer comprising nucelotide analogs, method of synthesis and use thereof
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