Some people with chest pain have normal or minimal narrowing of heart arteries; in these patients, vasospasm is a more likely cause for the pain, sometimes in the context of Prinzmetal's angina and syndrome X.
You are here. Pure Live Seed. Pure live seed (PLS) is a measure used by the seed industry to describe the percentage of a quantity of seed that will germinate. PLS is obtained by multiplying the purity percentage by the percentage of total viable seed, then dividing by 100.
Oyster seed is an oyster that is transplanted to another location for the purposes of commercial grow-out or restoration. Seed can be produced from a hatchery or harvested from the wild. The type of seed you will start with in this program is spat-on-shell or cultched oysters produced from a hatchery. In producing spat-on-shell in the hatchery, whole oyster shell is first dried out on land in order to remove organic material that could degrade water quality in the setting tanks.