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).
The C-reactive protein (CRP) test is used to find swelling and infection in your body. It does this by measuring the amount of CRP in your blood.CRP is a protein made by the liver and sent into the bloodstream. Blood levels may be higher when you have swelling (inflammation) or an infection.Because CRP levels often go up before you have symptoms of pain or fever and drop down as you recover, the CRP test is especially useful for tracking infections.he normal range for this test depends on the lab and the procedure used in the lab. Generally, a CRP level under 10 milligrams per liter (mg/L) is considered normal. If the level of CRP in your blood is higher than that, it may mean your body is having an inflammatory reaction to something.