Spread spectrum. In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth.
Lipids are one of the four major groups of organic molecules; the other three being proteins, nucleic acids (DNA), and carbohydrates (sugars). Lipids are made up of the same elements as carbohydrates: carbon, hydrogen, and oxygen.
1. Triglycerides. Triglyceride molecules are made from three molecules of fatty acids and one glycerol molecule. The fat can be either unsaturated or saturated. Triglycerides are able to float in a cellâs cytoplasm since they have a lower density than water and are non-soluble, as is the case with all lipids.