For a stay longer than 180 days, the flat-rate per diem is 55 percent. Rates are fixed, and partly based on the cost of living in a location. Johnson said the changes are meant to give long-term TDY travelers an incentive to seek out extended-stay lodgings, which generally are less expensive.
Bilirubin is a yellow pigment that causes jaundice and dark yellow colored urine when present in increased amounts. Some people normally have higher bilirubin in their blood. This is known as Gilbert's disease. So their urine will naturally have more bilirubin.
Bilirubin is excreted in bile and urine, and elevated levels may indicate certain diseases. It is responsible for the yellow color of bruises and the yellow discoloration in jaundice. Its subsequent breakdown products, such as stercobilin, cause the brown color of feces.