precursor

The researchers also found that the gene expression in these newly formed stem cells actually differs from their precursor cells.

"The amount of energy diverted to the biodiesel precursor, lipid, is even lower as lipid has high energy intensity," he said.

A task force in California has already seized 4.4 pounds of pink powder containing ketamine and despropionyl fentanyl, a fentanyl precursor, a recent study reported.

Chemical precursors are largely sourced from chemical companies in China that sell their products internationally.

The fall is also a precursor to darkness.