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.
For 2004, this rate is 37.5 cents per mile. For 2005, the rate increases to 40.5 cents per mile. So, in 2004, if you drove your vehicle 10,000 miles for. business, you can report a deduction of $3,750 -- without. having to keep any receipts for gasoline, oil changes, repairs and maintenance, insurance, etc.