Gelatin, crosslinking

Weatherill, T.D., Henning, R.W. and Smith, K.A. (1992) Solid state structural characterization of gelatin crosslinked yvith a variety of hardeners./. Photogi Sci., AO, 220. 

Polymonoallylamine, crosslinked or uncrosslinked ligno-sulfonate, condensed naphthalene sulfonate, or sulfonated vinyl aromatic polymer components react with each other in the presence of water to produce a gelatinous material [1510,1511]... 

A recent addition to General Chapter Dissolution <711> allows for the addition of enzyme to the dissolution medium. This is justified when gelatin-coated tablets or gelatin-encapsulated products exhibit a slow-down in the dissolution rate attributed to the crosslinking of the gelatin. The addition of enzyme will break up the crosslinking and therefore remove the... 

In biomedical applications, transglutaminases have been used for tissue engineering materials such as enzymatically crosslinked collagen [60-63] or gelatin scaffolds [64-69]. Even melt-extruded guides based on enzymatically crosslinked macromolecules for peripheral nerve repair have been reported [70]. 

Fig. 30. Electron micrographs of freshly cleaved chemically crosslinked polyurethane rubber, before (.4) and after (B) oxygen discharge etching (Spit 161a). Replication with polystyrene in chloroform (gelatin in water yields similar results). Rodlike structural elements of a few tenths of a micron are detectable in B. Reported...

Proteins crosslinked by formaldehyde are important in photography, the leather industry and in bio-medical sciences. Due to the complex structure of the gelatin molecules (consisting of approximately 20 Afferent kinds of amino acids) and the very low crosslink density, it is not possible to detect crosslink resonances under normal conditions. In order to overcome this problem a 13C enriched formaldehyde is used. By comparison with the chemical shifts of model crosslink compounds it is concluded that the predominant crosslink is formed between the lysine and arginine components in gelatin. A possible mechanism for the reaction between these two amino acid components and the formaldehyde has been proposed 154>. 

The ability of Fe111 salts to crosslink colloids such as gelatin can be used to produce a relief image in the colloid, useful for graphic processes such as lithography. A coating can be made of gelatin,... 

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