The author was referring to the steam holiday gems. They are a new feature (released yesterday) in which a steam user can turn their extra junk cards/backgrounds/emotes into gems.. These gems can be used to buy more cards; or, during the upcoming holiday event only, to bid on games.
Acinar cells. 1  Acinar cells are the exocrine (exo=outward) cells of the pancreas that produce and transport enzymes that are passed into the duodenum where they assist in the digestion of food.
A prerequisite for this physiological response is that under restingconditions the acinar cell maintains a Ca ++ gradient across the plasmamembrane with a low intracellular (nanomolar range) facing high extracel-lular (millimolar range) Ca ++ concentrations.