The standardized uptake value (SUV) is a nuclear medicine term, used in positron emission tomography (PET) as well as in modern calibrated Single Photon Emission Tomography (SPECT) imaging for a (semi)quantitative analysis.[1] Its use is particularly common in the analysis of [18F]fluorodeoxyglucose ([18F]FDG) images of cancer patients.
As you know tums tablets are mainly made of calcium carbonate. To get calcium carbonate, mining or quarrying is required but pure calcium carbonate can be made from a pure quarried source such as marble, etc.
Marmite is made from yeast extract, a by-product of beer brewing. Other similar products include the Australian Vegemite, the Swiss Cenovis and the German Vitam-R. The British version of the product is a sticky, dark brown food paste with a distinctive, powerful flavour, which is extremely salty.