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Nanostructure of water - soluble pectin ( WSP ) and chelate - soluble pectin ( CSP ) of two Chinese cherry ( Prunus pseudocerasus L . ) cultivars ( soft cultivar ' Caode ' and crisp cultivar ' Bende ' ) with two different ripening stages were characterised using atomic force microscopy .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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