Ultraviolet irradiation formulation

The molecular encapsulation of flavors with cyclo-dextrins was found to improve the resistence of light sensitive flavor constituents against daylight and ultraviolet irradiation. The photodecomposition of adsorbed and complexed flavors was tested both in the solid state and in aqueous solutions. The results of the light stability tests are demonstrated in the example of complexed and adsorbed citral,beta-ionone and cinnamaldehyde formulations /Table III./. 

These prepolymers are elaimed to eure rapidly in mixtures with vinyl ether monomers when exposed to ultraviolet irradiation in the presenee of onium salt photoinitiators. The light euring is not inhibited by oxygen, but apparently is affeeted by high atmospherie humidity. Table 3.4. lists some eommon diluents used in formulations for eationie polymerizations. 

Third-generation cationic emulsions were suggested as drug carriers for topical use in the skin. It was found that a-tocopherol-loaded cationic emulsion was able to prevent oxidative damage of cultured fibroblast cells [196], In addition, the same cationic formulation was able to protect rat skin against oxidative stress induced by ultraviolet (UV) irradiation significantly better than either the corresponding anionic emulsion or the cationic blank emulsion, as measured with a noninvasive... 

The ultraviolet curing of Inks and coatings has also received new attention. The renewed Interest In curing Inks has been Influenced by ecological and economic considerations.. The Inks can be formulated as solvent free systems which are sensitized to mercury 3650A irradiation. The curing energy is only a fraction of that needed with heat curable systems. 

Irradiation of a solution of the complex in benzene with ultraviolet light gives a black diamagnetic species which was formulated as Cp6Mn6(NO)g (58). However, as described in an earlier section, this compound has the molecular formula Cp-,Mn3(NO)4 (17a). 

Instead of directly curing an adhesive, ultraviolet light can replace chemical primers for anaerobic formulations under certain conditions. This technique involves applying the formulation to a substrate and irradiating the coated substrate for a prescribed length of time. Although the adhesive remains liquid, it has become susceptible to anaerobic polymerization and assembly leads to bond formation. 

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