1233
An in vitro ' glass stomach ' ( containing various volumes of hydrochloric acid [ HCl ] and ammonium chloride [ NH4Cl ] ) was used to evaluate the means of increasing ' gastric ' pH to that of the NH4 + - - > NH3 transition that occurs significantly at pH 9 . 24 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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