14587
Diffusion experiments for the cationic dye Rhodamine B through L - cysteine - modified membranes showed a decrease in flux upon addition of an acid due to the nanopore surface becoming positively charged .
 Chemical: Rhodamine B; Chemical: L - cysteine
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: Rhodamine B; Chemical: L - cysteine