Cell biology (formerly called cytology, from the Greek ÎºÏÏÎ¿Ï, kytos, vessel) is a branch of biology that studies the different structures and functions of the cell and focuses mainly on the idea of the cell as the basic unit of life.
(B) For a cylinder having a water capacity over 12 pounds-- (1) By hydrostatic test without determination of expansion (modified hydrostatic test method). A retest must be performed 12 years after the original test date and at 7-year intervals; or (2) By hydrostatic test using the water jacket method. A retest must be performed 12 years after the original test date and at 12-year intervals thereafter.
Long Term Radon Test Kits. Long term radon test kits run from 90 days to one year. Since radon levels can fluctuate significantly from day to day, a long term test is required if you wish to know the true average levels.f your water comes from a well and your air radon levels are elevated, it is advisable to conduct a radon water test. View Products. Radon Gas Detectors. The radon detector provides the home owner with a simple and cost effective way to monitor radon levels on an ongoing basis.