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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

The Ku Klux Klan forces John Campbell, a black man, to beg for his life in Moore County, North Carol The Ku Klux Klan forces John Campbell, a black man, to beg for his life in Moore County, North Carol
A medical records department. (Paper records are becoming obsolete, replaced by electronic records.) A medical records department. (Paper records are becoming obsolete, replaced by electronic records.)
Pressure testing the cooling system. A typical hand-operated pressure tester applies pressure equal ... Pressure testing the cooling system. A typical hand-operated pressure tester applies pressure equal ...
To check to see if the electric fuel pump can be operated from the relay contacts, use a fused ... To check to see if the electric fuel pump can be operated from the relay contacts, use a fused ...
A vacuum-operated EGR valve. The vacuum to the EGR valve is computer controlled by the EGR valve ... A vacuum-operated EGR valve. The vacuum to the EGR valve is computer controlled by the EGR valve ...
"The Department of Agriculture came out today with its prediction for food price "The Department of Agriculture came out today with its prediction for food price
Video: Cardiac conductile cells

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