Refer to our section on polarized light microscopy utilizing the QX3 microscope for detailed information about polarizer placement. This mild pain reliever, originally derived from the bark of willows, is also proving to be useful as an anticoagulant, preventing or reducing the severity of heart attacks and stroke. The drug crystallizes in the form of a white, needle-like powder with only a faint odor. Although vitamin A is not present in any plants, the beta -carotene precursor can be found in carrots, pumpkins, spinach, squash, watermelon, asparagus, broccoli, and cantaloupe. Caffeine - Coffee and tea are popular sources of this mildly addictive stimulant.
Caffeine is cleared from the body through metabolism and excreted in the urine.
Symptoms of overdose include insomnia, restlessness, tremor, delirium, tachycardia, and running of the mouth. This notorious pesticide is still being widely used in many areas of the world. Ellagic acid is a bicyclic coumarin derivative that is a naturally occurring phytochemical proven effective in arresting mitosis in some carcinomas. Malonic Acid - Malonic acid is an organic dicarboxylic acid with a methylene group separating the two carbonyl moieties. The diethyl ester of malonic acid is used in the syntheses of several vitamins, barbituates, and numerous other organic compounds.