Cause of the Hum. In the U.S. electrical transformers the hum that occurs happens at a frequency of 120 Hz. When vibrations reach this level of repetition, the metal used to construct the transformer internal core begins to give off a noise. The vibration, or hum, is a reaction by the transformer metal to the presence of a magnetic field created as electricity passes through. This process is called magnetostriction.
A high-sensitivity CRP (hs-CRP) test measures low levels of CRP using laser nephelometry. The test gives results in 25 minutes with a sensitivity down to 0.04 mg/L.RP is synthesized by the liver in response to factors released by macrophages and fat cells (adipocytes). It is a member of the pentraxin family of proteins. It is not related to C-peptide (insulin) or protein C (blood coagulation).
C-Reactive Protein, or CRP, is a test that measures the concentration in blood serum of a special type of protein produced in the liver. The protein is present during episodes of acute inflammation or infection. In the body, CRP interacts with the complement system, an immunologic defense mechanism.