Prismarine Shards are items added in 14w25a that can be obtained by defeating the Guardian mob. They can be crafted into Prismarine variants such as Prismarine Brick and Dark Prismarine.
After veg they will usually flower for anywhere for 8 to 9 weeks. The breeder recommends growing Jack Berry F2 in a SCRoG type grow, where the yield can reach above average, at best. This is a strain that spends most of its energy developing trichomes, rather than bud mass. Don't expect huge yields with this one. In most cases, it simply isn't possible.
In obstructive lung disease however, FEV1 is reduced while FVC remains stable, consequentially depicting a lower FEV1/FVC ratio. One definition requires a total lung capacity which is 80% or less of the expected value.