A radioactive iodine uptake (RAIU) test uses a radioactive tracer and a special probe to measure how much tracer the thyroid gland absorbs from the blood. The test can show how much tracer is absorbed by the thyroid gland.
Learn How to Lay Blocks. Start mixing mortar mix as instructed. The first course of blocks should be installed below floor level and inside the foundation trench. This first line of concrete blocks shall rest on top of a layer of mortar mix. Spread mortar along the sides of the block and remove the excess mortar with a trowel. Repeat until the first course has been installed. Check the course with a level. Then, even it out with a thicker layer of mortar, if it is not.
Sealing and Waterproofing Block. Concrete or cinder blocks are commonly used to build buildings, masonry walls and foundations. Most block masonry installations are held together with cement mortar between the blocks. This mortar is the glue that holds the whole structure together. Unfortunately mortar is also very porous, and will quickly absorb water and moisture. Efflorescence is also a big problem on block.