A carbohydrate is a biomolecule consisting of carbon, hydrogen and oxygen atoms, usually with a hydrogenâoxygen atom ratio of 2:1; in other words, with the empirical formula Cm(H2O)n. This formula holds true for monosaccharides. Some exceptions exist; for example, deoxyribose, a sugar component of DNA, has the empirical formula C5H10O4. The carbohydrates are technically hydrates of carbon; structurally it is more accurate to view them as aldoses and ketones. The term is most common in ...
Card Security Code (CSC). The card security code (CSC), also known as the Card Verification Value (CVV) is a 3- or 4-digit number associated with your credit card, printed only on the card and not on statements or charge slips.
Border Crossing Card. Overview. The Border Crossing Card (BCC) is both a BCC and a B1/B2 visitorâs visa. A BCC (also referred to as a DSP-150) is issued as a laminated card, which has enhanced graphics and technology, similar to the size of a credit card. It is valid for travel until the expiration date on the front of the card, usually ten years after issuance.