A factoid is either a false or spurious statement presented as a fact[1][2] or a true, but brief or trivial, item of news or information.
The Harmonized Tariff System (HTS) provides duty rates for virtually every item that exists. The HTS is a reference manual that is the size of an unabridged dictionary. The HTS - tariff database, is an interactive data base that will enable you to get an approximate idea of the duty rate for a particular product. CBP will make the final determination of what the correct rate of duty is, not the importer.
AST (aspartate aminotransferase), or SGOT (serum glutamic-oxaloacetic transaminase) as it is also referred to, is one of the many enzymes (proteins) that reside in the cells of your body and assist in the chemical reactions taking place in your body.