| http://www.w3.org/ns/prov#value | - For example, the hardness enhancer may be (1) a substance having a double bond between C and O (C???O) (for example, carbon monoxide, ketone, aldehyde, formalin, tamarin, alkoxytamarin, carboxylic acid, nickel formate, sodium formate, protein such as gelatin), (2) a substance having a double bond between C and C (C???C) (for example, alkylene carboxy ester, alkylene aldehyde, aryl aldehyde, aryl a
|
