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Root nodule. A simplified diagram of the relation between the plant and the symbiotic bacteria (cyan) in the root nodules. Root nodules are found on the roots of plants, primarily legumes, that form a symbiosis with nitrogen-fixing bacteria. [1] Under nitrogen -limiting conditions, capable plants form a symbiotic relationship with a host ...
Nodules are small firm lumps usually greater than 1 cm in diameter, found in skin and other organs. [1] [2] If filled with fluid they are usually softer and referred to as cysts. [2] Smaller (less than 0.5 cm) raised soft tissue bumps may be termed papules. [3]
t. e. Categorization for signal modulation based on data and carrier types. Modulation is defined as the process by which some characteristics like amplitude, frequency, and phase of a carrier signal are varied in accordance with a modulating wave. In electronics and telecommunications, modulation is the process of varying one or more ...
The peripheral nodulations also become more transverse and divided into three smaller nodules each, from the same cause; on the seventh and eighth whorls the lines of growth become more rude, the flutings and nodulation gradually vanish, and the sculpture is reduced to obscure spiral ridges, finer and more uniform on and behind the fasciole ...
Amplitude modulation ( AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in ...
e. Phase modulation ( PM) is a modulation pattern for conditioning communication signals for transmission. It encodes a message signal as variations in the instantaneous phase of a carrier wave. Phase modulation is one of the two principal forms of angle modulation, together with frequency modulation . In phase modulation, the instantaneous ...
Frequency modulation ( FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and computing . In analog frequency modulation, such as radio broadcasting, of an audio signal representing voice or music, the ...
v. t. e. In radio communications, single-sideband modulation ( SSB) or single-sideband suppressed-carrier modulation ( SSB-SC) is a type of modulation used to transmit information, such as an audio signal, by radio waves. A refinement of amplitude modulation, it uses transmitter power and bandwidth more efficiently.