For this telescope, the lenses are a concave convex (one side curved out and the other curved in) and a plano concave (one flat side and one side curved in). The plano concave lens is used as the eyepiece with the plano (flat) side facing the eye.
If kidney function begins to decline, BUN and creatinine rise. A normal creatinine depends on muscle mass and age. In general, a normal creatine is 0.5 to 1.2 milligrams per deciliter (mg/dL). A normal BUN is 7 to 20 mg/dL.
BUN is a measure of kidney function. A high level may indicate that the kidneys are functioning less than normal. Normal Values: 8-25mg/100ml (USA) 2.9-8.9 mmol/L (International). This test measures the amount of carbon dioxide in the blood.Most carbon dioxide is present in the form of bicarbonate, which is regulated by the lungs and kidneys.UN is a measure of kidney function. A high level may indicate that the kidneys are functioning less than normal. Normal Values: 8-25mg/100ml (USA) 2.9-8.9 mmol/L (International). This test measures the amount of carbon dioxide in the blood.