An ammonia test measures the amount of ammonia in the blood. Most ammonia in the body forms when protein is broken down by bacteria in the intestines . The liver normally converts ammonia into urea, which is then eliminated in urine. Ammonia levels in the blood rise when the liver is not able to convert ammonia to urea. This may be caused by cirrhosis or severe hepatitis. For this test, a blood sample may be taken from either a vein or an artery.
Deduction Amount hide... The deduction is equal to the cost of the vehicle's engine, the equipment used to store or deliver the fuel, and the equipment used to exhaust combusted gases, up to a maximum of $2,000 for vehicles places in service by the end of 2005.
One of my favorite tax deductions is to deduct mileage used for business. If you are driving your car for business, you can deduct 55 cents (56.5 cents for 2013) for every mile you drive. Thatâs pretty generous in my opinion considering that $4 per gallon gasoline for a car that gets 30 miles per gallon costs you 13 cents per mile.