low-gradient
21Gravity-gradient stabilization — is a method of stabilizing artificial satellites in a fixed orientation using only the orbited body s mass distribution and the Earth s gravitational field. The main advantage over using active stabilization with propellants, gyroscopes or… …
22Trans-tubular potassium gradient — The trans tubular potassium gradient (TTKG) is an index reflecting the conservation of potassium in the cortical collecting ducts of the kidneys. It is useful in diagnosing the cause of hyperkalemia. The following is the formula for calculating… …
23Countercurrent exchange — Counter heat current exchange: Note the gradually declining differential and that the once hot and cold streams exit at the reversed temperature difference; the hotter entering stream becomes the exiting cooler stream and vice versa.… …
24Channel types — A wide variety of river and stream channel types exist in limnology. All these can be divided into two groups by using the water flow gradient as either low gradient channels for streams or rivers with less than two percent (2%) flow gradient, or …
25permafrost — /perr meuh frawst , frost /, n. (in arctic or subarctic regions) perennially frozen subsoil. Also called pergelisol. [1943; PERMA(NENT) + FROST] * * * Perennially frozen earth, with a temperature below 32 °F (0 °C) continuously for two years or… …
26Aortic valve stenosis — Classification and external resources ICD 10 I35.0, I06.0, Q23.0 …
27Coast Range (EPA ecoregion) — This article is about the ecoregion designated by the EPA. For the mountains in California, see California Coast Ranges. For the mountains in Oregon, see Oregon Coast Range. For the mountains in Washington, see Olympic Mountains. Level III… …
28Coast Range (ecoregion) — The Coast Range ecoregion is a Level III ecoregion designated by the Environmental Protection Agency (EPA) in the U.S. states of Washington, Oregon, and California. It stretches along the Pacific Coast from the tip of the Olympic Peninsula in the …
29Eastern Cascades Slopes and Foothills (ecoregion) — The Eastern Cascades Slopes and Foothills ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Oregon, Washington, and California. In the rain shadow of the Cascade Range,… …
30Ascites — Classification and external resources The major signs and symptoms of heart failure. (Ascites labeled near center.) ICD 10 R …
