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from article Dairy cattle production
Modern machinery is used in the production of milk. (Credit: Yadamons/Getty Images)
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Image
from article Dairy cattle production
A typical dairy cattle farm in northeast Iowa. (Credit: Lynn Betts/Natural Resources Conservation Service, U.S. Department of Agriculture)
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from article Dairy cattle production
Holstein dairy cattle in Washington County, Virginia. (Credit: Jeff Vanuga/Natural Resources Conservation Service, U.S. Department of Agriculture)
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from article Agricultural aircraft
An agricultural aircraft applying pesticide over a field. (Credit: BrianBrownImages/Getty Images)
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from article Agricultural aircraft
Application equipment for fixed-wing agricultural aircraft. The spraying equipment is shown on the aircraft, and a ram-air-type spreader for dry materials is shown below the aircraft.
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from article Agricultural aircraft
Application equipment for rotary-wing agricultural aircraft. (a) Helicopter with spray equipment attached. (b) Dry equipment. (c) Detail of hopper and spinner.
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from article Amino acid
Structural formula for an amino acid. (Copyright © McGraw Hill)
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from article Amino acid
The 20 amino acids that serve as the building blocks for proteins. These amino acids (shown with their respective three-letter abbreviations) can be divided into nonpolar, polar, and electrically charged groups. (Copyright © McGraw Hill)
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from article Amino acid
Synthesis of a dipeptide. When an amino group of one amino acid is linked to the carboxyl group of another amino acid, a peptide bond linkage is formed. A molecule of water (H2O) is split out when a peptide bond is formed. (Copyright © McGraw Hill)
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from article Amino acid
Two-dimensional chromatogram of a protein. (Credit: R. J. Block, E. L. Durrum, and G. Zweig)
