It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Covalent Bonding.
Evidence for the covalent intermediate in the mechanism of lysozyme
Coenzyme Q collects electrons from multiple flavoproteins
Covalent bond
Covalent Bonds رابطة تساهمية
How many electrons flow past a given cross section of the wire in 10.3 min? electrons