Process control systems in a chemical plant or oil refinery maintain fluid levels, pressures, temperature, chemical composition, etc. by controlling heaters, pumps and valves. [citation needed] The centrifugal governor of a steam engine, as designed by James Watt in 1788, reduces the throttle valve in response to increases in the engine speed, or opens the valve if the speed falls below the pre-set rate.
Collagen is made from dietary proteins. As a structural protein, collagen builds connective tissues found throughout your body. While it's essential for tendons and ligaments, collagen does much more than that: It supports soft tissues such as organs, gives resilience to bones and keeps your skin firm. It can fill such diverse jobs thanks to a chain-like structure that can form long filaments and crisscross into sheets of connective tissue.
Collagen composes up to 80 percent of the skin. Its role is to maintain the skin's integrity, but collagen breaks down with advancing age. The breakdown of collagen during the aging process can lead to wrinkles, lines and folds. Collagen injections replenish the skin's natural collagen.Several types of Collagen fillers are on the market. For example, collagen fillers containing human collagen include CosmoDerm and Cosmoplast.he breakdown of collagen during the aging process can lead to wrinkles, lines and folds. Collagen injections replenish the skin's natural collagen. Several types of Collagen fillers are on the market. For example, collagen fillers containing human collagen include CosmoDerm and Cosmoplast.