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.
Lipids are made up of the elements carbon, hydrogen and oxygen but in different proportions to carbohydrates. The most common type of lipid is the triglyceride. Lipids can exist as fats, oils and waxes.Fats and oils are very similar in structure (triglycerides).hese are made up of 3 fatty acid chains attached to a glycerol molecule. Fatty acids are chains of carbon atoms, the terminal one having an OOH group attached making a carboxylic group (COOH).