It is a 6-digit number assigned by Visa to each acquirer. If a merchant has different acquirers for Authorization versus Settlement, the merchant will have a separate BIN for each one. SIGIS is only collecting the Authorization Acquirer BIN at this time.
Carbon is the basic building block for all forms of life on Earth. Fortunately, carbon is also one of the most abundant elements on our planet. Like all matter, carbon can neither be created nor destroyed, and so all living organisms must find a way to continually reuse the finite carbon supply that is available.
There is also a stable isotope of carbon, 13 C. This isotope is important in that it allows us to correct for carbon isotope fractionation in nature and during analytical procedures. Abundance of carbon isotopes in nature 12 c