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 an echocardiogram? An echocardiogram (also called echo, transthoracic echocardiogram or TTE, exercise or stress echocardiogram, dobutamine stress echocardiogram or DSE, or transesophageal echocardiogram or TEE) is a noninvasive (the skin is not pierced) procedure used to assess the heart's function and structures.