MEDICINE MCQ
RENAL MEDICINE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
A: 10 cm at 2,000 revolutions.
|
|
|
B: 8 cm 5,000 revolutions.
|
|
|
C:35cm 14,000 revolutions
|
|
|
D:4cm 45.00 revolutions
|
Detailed explanation-1: -The sedimentation rate is proportional to the difference in density between the particle and the medium. The sedimentation rate is zero when the particle density is the same as the medium density. The sedimentation rate decreases as the medium viscosity increases.
Detailed explanation-2: -After centrifugation, a clear liquid, called supernatant, is floating over the sediment or precipitate. Figure 2.4. 1 shows the separation of supernatant from the precipitate by decantation and by aspiration.
Detailed explanation-3: -The centrifugal sedimentation method is a method for determining the particle size from the speed of particles moving by centrifugal force (settling velocity). When a centrifugal force is applied to particles, larger particles settle faster and smaller particles settle slower.