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.
Each small organic molecule can be a unit of a large organic molecule called a macromolecule. lipids, polypeptides or proteins, and nucleic acids such as DNA and RNA). lipids are made of only carbon, hydrogen, and oxygen (CHO). hydrogen, oxygen, and nitrogen (CHON). hydrogen, oxygen, nitrogen, and phosphorus (CHON P).