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.
Live echinacea, pictured above, is a thing of beauty. Its dried form, below right, isn't as pretty but makes a mean tincture. TINCTURE BASICS. Tinctures can be made from any high-quality herb, fresh or dried. Certain herbs, such as St. Johnâs Wort, skullcap, and motherwort, are better used fresh, but either way will do in a pinch. Things to keep in mind when evaluating the medicinal qualities of dried herbs: â¢ Color.