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In music theory, a tetrachord (Greek: τετράχορδoν; Latin: tetrachordum) is a series of four notes separated by three intervals.In traditional music theory, a tetrachord always spanned the interval of a perfect fourth, a 4:3 frequency proportion (approx. 498 cents)—but in modern use it means any four-note segment of a scale or tone row, not necessarily related to a particular tuning ...
Tetrachord Note order Step to next note (Number of steps) Note name starting from Rast [1] Rast pentachord: Rast tetrachord: 1 T (9) Rast 2 K (8) Dügâh 3 S (5)
For typical ionic solids, the cations are smaller than the anions, and each cation is surrounded by coordinated anions which form a polyhedron.The sum of the ionic radii determines the cation-anion distance, while the cation-anion radius ratio + / (or /) determines the coordination number (C.N.) of the cation, as well as the shape of the coordinated polyhedron of anions.
Fluid and electrolyte balance, in which fluid balance and electrolyte balance are intertwined homeostatically, is necessary to health in all organisms.It includes reference ranges for cation concentrations of biometals, which in reference to human medicine and veterinary medicine principally includes those for blood serum ion concentrations in humans and in livestock and pets.
Ions often move through the segments of the channel pore in a single file nearly as quickly as the ions move through the free solution. In many ion channels, passage through the pore is governed by a "gate", which may be opened or closed in response to chemical or electrical signals, temperature, or mechanical force. [citation needed]
If a patient is unable to make decisions for themselves about personal care, a surrogate agent must make decisions for them. If there is a durable power of attorney for health care, the agent appointed by that document is authorized to make health care decisions within the scope of authority granted by the document. If people have court ...
The notes of the central tetrachord of the system in ascending order are hypate, parhypate, lichanos (or hypermese), and mese. A second tetrachord is added above, after a disjunctive tone, and the corresponding names (together with the interval ratios of the standing tones) are: [6] mese (4:3) – nete (2:1) (standing) lichanos – paranete ...
In Turkish classical music, the Uşşak pitch class set is a set of scales that are named after the Uşşak or Hüseynî makams.For Uşşak, there is the Uşşak tetrachord and the Hüseynî pentachord.