摘要:
In the treatment of collagen containing materials for gelatin extraction purposes, conditioning the collagen source enzymatically at pH 7-13 with protease, pH level being selected to match the pH optimum of the protease, for 4-72 hours, at 20.degree. - 40.degree. C.
摘要:
Chemically modified dialdehyde polysaccharides are used as gel strength enhancers for gelatin compositions. These modified polysaccharides are particularly useful as gel strength enhancers for gelatin compositions which have been extended with starch or dextrin.
摘要:
Gelatin is extracted from collagen-containing substances by liquefaction with hydrogen peroxide as the sole lyotropic agent. Collagen-bearing tissue is liquefied through agitation with hydrogen peroxide at about 45.degree.-60.degree. C. for from about 4 to about 24 hours at concentrations such that the weight of peroxide is from about 1/3 to 3 times the weight of collagen protein within the system. The thus formed colloidal solution gels upon cooling, and gelatin degradation is minimized by removing peroxide from the solution before the gelatin is dried.
摘要:
This invention relates to a process for crosslinking hydrophilic colloids, e.g., gelatine. The crosslinking agent corresponds to the formula X1-CR1 CH-Y1. R1 represents a hydrogen atom or an organic substituent, X1 represents a heterocyclic radical bound to CH- by means of nitrogen and Y1 denotes an aldehyde group or a functionally modified aldehyde group.
摘要:
POLYERIC CCMULSIONS ARE HARDENED BY CROSSLINKING WITH MULTIVALENT CATIONS THAT ARE INITIALLY PRESENT IN THE EMULSIONS IN THE FORM OF COMPLEXES WITH COMPLEXING AGENTS. HARDENING OF THE EMULSIONS OCCURS WHEN THE CROSSLINKING CATIONS ARE RELEASED FROM THE COMPLEXES, E.G., BY DISPLACEMENT WITH OTHER CATIONS.
摘要:
PHOTOGRAPHIC FILMS, PLATES AND PAPERS HAVING A SELFADHERENT COATING OF A WATER-INSOLUBLE, IONIZABLE PARTIAL SALT OF COLLAGEN DEPOSITED THEREON FROM A DISPERSION OF THE SALT CONTAINING PHOTOSENSITIVE SUBSTANCES. COLLAGEN CROSS-LINKING AGENTS MAY BE INCLUDED IN THE COATING COMPOSITIONS SO AS TO ENHANCE THE PHYSICAL PROPERTIES OF THE COATINGS.
摘要:
Pharmaceutical compositions which include in addition to the pharmaceutical ingredient or ingredients a water-insoluble, ionizable, partial salt of collagen or microcrystalline collagen. The composition may be in the form of a pourable liquid, a gel or ointment or a solid compressed tablet. The microcrystalline collagen colloidally dispersed in the liquid improves the stability of suspended ingredients in liquids and gels.
摘要:
A new physical form of collagen termed microcrystalline collagen is a water-insoluble but water-dispersible ionizable, partial salt of collagen and is formed by treating undenatured collagen with dilute acid solutions having a pH between about 1.6 and 2.6. Mechanically disintegrating the treated collagen in aqueous liquids until at least 10 percent by weight has been reduced to a submicron size produces dispersions in the aqueous liquids which have an essentially constant viscosity. This new form of collagen may be used in a wide variety of food, pharmaceutical and cosmetic preparations.
摘要:
AN IMPROVED PROTEIN-AMINE-ALDEHYDE RESIN COMPOSITION AND PARTICULARLY AN ANIMAL GLUE-UREA-FORMALDEHYDE RESIN COMPOSITION WHICH IS THERMOSETTING AND FORMS A STRONG ADHESIVE BOND HAVING GOOD WATER, OIL, HEAT AND ABRASION RESISTANCE AND WHICH IS ESPECIALLY SUITED FOR USE IN THE MANUFACTURE OF SANDPAPER AND WHICH ALSO HAS GENERAL APPLICATION AS AN ADHESIVE OR SIZE FOR PAPER, CLOTH, WOOD, METAL AND VITREOUS MATERIALS.
WHEREIN X IS AN ANION OF AN ACID AN IONIZATION CONSTANT OF A LEAST 10-2, HAS BEEN FOUND TO PROVIDE A GELATIN HARDENING FUNCTION WHEN UTILIZED THEREWITH.