Why pH Measurements Are Important. Chemicals reactions in water are affected by the acidity or alkalinity of the solution. This is important not only in the chemistry lab, but in industry, cooking, and medicine. pH is carefully regulated in human cells and blood. The normal pH range for blood is between 7.35 and 7.45.
The radiation one typically encounters is one of four types: alpha radiation, beta radiation, gamma radiation, and x radiation. Neutron radiation is also encountered in nuclear power plants and high-altitude flight and emitted from some industrial radioactive sources. Alpha Radiation. 2  Alpha radiation is a heavy, very short-range particle and is actually an ejected helium nucleus. 3  Some characteristics of alpha radiation are: 4  Examples of some alpha emitters: radium, radon, uranium, thorium.
The 1000 most exposed residents receive an average external effective radiation dose of 6 mSv per year, (0.6 rem/yr,) six times the ICRP recommended limit for exposure to the public from artificial sources. They additionally receive a substantial internal dose from radon.ecord radiation levels were found in a house where the effective dose due to ambient radiation fields was 131 mSv/a, (13.1 rem/yr) and the internal committed dose from radon was 72 mSv/a (7.2 rem/yr). This unique case is over 80 times higher than the world average natural human exposure to radiation.