In 1864, the first barbiturate (barbituric acid) was synthesized.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
insect's compound eye, revealing photoreceptor cells, support cells and pigment cells
Hydrogen Bond
Hydration of a Carbon–Carbon Double Bond
Catalysis of peptide bond hydrolysis by chymotrypsin (part 1)