If propionic, butytric, iso-valeric, hexanic acid et al short-chainfattyacids were detected in urine of human, the urine can be regarded as pathologic urine.
In contrast, African children had lots of bacterial species associated with leanness, and a higher proportion of microbes known to produce beneficial chemicals called short-chainfattyacids (SCFAs).
Biodiesel fuel, as a renewable energy and pro-environmental energy, can be produced by the transesterification reaction of vegetable oils or fattyacids with shortchain alcohols.