The term absorption coefficient is identified in base64 scheme by the sequence YWJzb3JwdGlvbiBjb2VmZmljaWVudA==, while the MD5 signature is equal to 487c2bc46fe29e43ec39f49169ad1a42. The ASCII encoding of absorption coefficient in hexadecimal notation is 6162736f727074696f6e20636f656666696369656e74.