A PKU is a serum test, so it goes in a red top.
If bacterium cannot use glucose the fermentation tube will stay the same color. Gas may also occur inside the fermentation tube.
The volume of a siphon tube would depend on its specific dimensions, such as length and diameter. To calculate the volume, you would use the formula for the volume of a cylinder, which is V = πr^2h, where r is the radius of the tube and h is the height (or length) of the tube.
I can't remember the tube color (probably speckled or red for serum after clotting and centrifugation) but when I worked in a medical laboratory (until 2001) the key thing was to protect the specimen from light by wrapping the tube in aluminum foil!
Red test tubes are typically used for the blood type Rh factor test.
To clean inside test-tubes properly. If it didn't exist it would have to be invented.
I would use the semi-colored tube.
serum,tiger tube
The color tube you use when drawing blood for a lab test depends on the type of test you are running. For a Na blood test you would use a red tiger strip tube.
green
a lavender top tube
The color of tube generally used for creatinine testing is a red-stoppered tube, which typically contains no additive or a gel separator. This is to allow the serum or plasma to be separated from the blood cells for accurate testing.
blue
red
red
You would typically use a lavender-top tube for transferrin saturation testing. This tube contains the anticoagulant EDTA, which is suitable for testing iron-related parameters like transferrin saturation.
Red top tube would be used. This color tube is also used for kidney and liver function tests, electrolytes(Na, K, Cl, C02), sometimes glucose and also iron levels.
A complete blood count (CBC) is drawn in a lavender-top tube.