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US 12,703,850 B2Granted
Photostabilized compositions and a method for stabilizing photosensitive components
AssigneeEvonik Operations GmbH
InventorsStephan Brinkmann, Martin Schilling, Anne Benedikt, Christina Jost, Tamara Heinze
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Abstract
Photostabilized compositions may include a water-soluble tyrosine-containing compound with a molecular weight of below 1 kDa and at least one photosensitive component. A method for stabilizing one or more photosensitive components may include the addition of a tyrosine-containing dipeptide with the one or more photosensitive components. The water-soluble tyrosine-comprising compound may be present at a concentration of at least 0.5 mM. The composition may be a culture medium.
Claims19
A method for stabilizing a photosensitive composition, the method comprising:
- combining Ala-Tyr or Gly-Tyr, at a concentration in a range of from 0.5 to 20 mM, with a photosensitive composition comprising tryptophan in at least 2.5 mM, thereby stabilizing the photosensitive composition against brown coloration, wherein the photosensitive composition is an aqueous culture medium comprising a carbohydrate, a further free amino acid, an inorganic salt, a buffering agent, an/or a vitamin, wherein a molar ratio of the Ala-Tyr or Gly-Tyr to the tryptophan is in a range of from 0.2:1 to 8:1.
Dependencies are inferred from the claim text.