The term coefficient of absorption is identified in base64 scheme by the sequence Y29lZmZpY2llbnQgb2YgYWJzb3JwdGlvbg==, while the MD5 signature is equal to f5175ca9aeea7f35db708bf050ed047e. The ASCII encoding of coefficient of absorption in hexadecimal notation is 636f656666696369656e74206f66206162736f727074696f6e.