The salinity of the water is measured with a CTD instrument (Conductivity, Temperature, Depth). The conductivity is used to calculate the salinity in conjunction with the temperature and depth (pressure) measurements.Seawater has an average density of 1.027 gm/cm 3, but this varies with temperature and salinity over a range of about 1.020 to 1.029.he salinity of the water is measured with a CTD instrument (Conductivity, Temperature, Depth). The conductivity is used to calculate the salinity in conjunction with the temperature and depth (pressure) measurements.
The Multifocal Electroretinogram. What is the Electroretinogram (ERG)? The electroretinogram (ERG) is a recording of the bioelectric potential, the summed activity of the retinal cells located at the back of the eye, when stimulated by light. When bioelectrical changes occur within the retina, the change is propagated to the surface of the cornea.
What is the QuantiFERON Gold test? QuantiFERON Gold is a type of blood test that is used to diagnose tuberculosis (primarily latent, or inactive tuberculosis). It was approved by the FDA in 2001 to help detect latent Mycobacterium tuberculosis infections. QuantiFERON Gold is a type of Interferon-Gamma Release Assay, or IGRA, test.