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Effects of beta - carotene on the oxidative stability of chlorophyll or riboflavin photosensitized oil - in - water ( O / W ) emulsions were determined by analysing the depleted headspace oxygen content , lipid hydroperoxides , fluorescence intensity , and headspace volatiles .
 Chemical: beta - carotene; Chemical: chlorophyll; Chemical: riboflavin; Chemical: oxygen; Chemical: hydroperoxides
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: beta - carotene; Chemical: chlorophyll; Chemical: riboflavin; Chemical: oxygen; Chemical: hydroperoxides