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The NYQUIST LIIMIT-It is a sampling phenomenon, which limits the maximum fiequemcy shift measurement to one half of the sampling frequency (PRF).
By its nature, pulse wave Doppler is a sampling system while continuous wave Doppler is not. The nyquist limit is a theoretical maximum frequency that a
If the frequency shift is higher than the Nyquist frequency, aliasing occurs; i.e., the Doppler spectrum is cut off the Nyquist frequency and the remaining frequency shift is recorded on the opposite side of baseline.
The PRF varies inversely with the depth of the sample volume the shallower the location of the sample volume, the higher the PRF and Nyquist frequency. In other words, higher velocities can be recorded without aliasing by pulse wave Doppler if the sample volume is closer to transducer.
Phototropism - Root and Shoot Morphogenesis Paratonic growth movement of part of a plant in response to light, e.g. bending of stems of indoor plants towards a window, brough
Response to Heavy Metal Stress Several heavy metals emanating from industrial mining and sewage disposal operations contaminate the environment. Cadmium is a common contamina
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Leptospirosis It is a bacterial disease that occurs in many domestic and wild animals, is endemic worldwide, but the highest incidence is in tropical and subtropical areas. Tr
Why it was necessary to develop regulations on the preparation and sale?
Plants of Estuary The plants of the estuary are of four basic types: Phytoplankton, Marginal marsh vegetation, Mud-flat algae and Epiphytic plants
What is Mendelian Genetics? Mendelian Genetics : In 1868, an Austrian monk, Gregor Mendel, first published the basics of a study we now call Mendelian genetics. Mendel obser
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SYNAPSE - The point where 2 neurons combine is synapse. It is of 2 types - (i) Axosomic (between axon & cyton) (ii) Axodendric (between axon & dendron) Axon is term
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