Chemistry: natural resins or derivatives; peptides or proteins; – Proteins – i.e. – more than 100 amino acid residues – Scleroproteins – e.g. – fibroin – elastin – silk – etc.
Patent
1998-11-05
1999-07-06
Brunsman, David
Chemistry: natural resins or derivatives; peptides or proteins;
Proteins, i.e., more than 100 amino acid residues
Scleroproteins, e.g., fibroin, elastin, silk, etc.
1061601, C08L 8900, C09D18900
Patent
active
059199067
ABSTRACT:
The present invention describes a gelatin having a high molecular weight fraction (>250,000 Daltons) of from 0 to 25 wt %, a beta fraction (150,000-250,000 Daltons) of from 0 to 20 wt % and an alpha fraction (50,000-150,000 Daltons) of from 15 to 55 wt %. The gelatin has a gel strength of from 200 to 400, an absorbance a 420 nm of from 0 to 0.068 and a concentration of protease of greater than 10 ppb.
REFERENCES:
patent: 2761791 (1956-09-01), Russell
patent: 3508847 (1970-04-01), Martin
patent: 3539644 (1970-11-01), Burness et al.
patent: 4655840 (1987-04-01), Wittwer et al.
patent: 5034249 (1991-07-01), Reif et al.
Research Disclosure, Dec. 1989, no month avail. No. 308119.
Burrows Deborah J.
Rowlands Anne G.
Brunsman David
Eastman Kodak Company
Ruoff Carl F.
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