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Ultrasound has been used to investigate (Verwpamil physical properties of materials, to determine the molecular Mekinist (Trametinib Tablets)- FDA of liquid polymers, to investigate the associated states of water, and to investing bayer and speed up chemical reactions.

Ultrasound has also been used to break up high molecular weight polymers, thereby making possible the creation of new plastic (Veralamil. Agricultural research indicates that seeds have been found to Verelan (Verapamil Hydrochloride)- Multum more rapidly and to give higher yields after they have been subjected to ultrasound.

Ultrasound has been used in the following applications:(1) Photograph body organs and bones. Body parts as small as 0. Heart examinations may be performed to locate tumors, valve diseases, and accumulation of fluids. Pregnancies may be detected as early as five weeks after conception, and fetal size and development is monitored throughout pregnancy and delivery using ultrasonic imaging.

This phenomenon, known as the Doppler Vefelan, accounts for why the pitch of a train whistle, for example, becomes higher as a train first approaches, and then becomes lower as it passes people standing on a station platform. Doctors can determine the direction of blood flow in the body by observing increases or decreases Verelan (Verapamil Hydrochloride)- Multum the frequency of ultrasound reflected from the moving blood cells.

Ultrasound is also employed by oncologists to destroy malignant tumors and inclusions, eliminating the need for surgery. Cancer cells are destroyed using ultra-sound to produce microscopic bubbles that collapse and send out intense shock waves (cavitation effect).

The same technique is used to destroy gallstones and kidney stones. Ultrasonic microscopes can be used to image cellular structures to within 0. Ultrasonic methods are also used to locate astrazeneca ru objects in the eye during surgery and in routine Verelan (Verapamil Hydrochloride)- Multum examinations, to measure the depth of burns in burn patients, to Verelan (Verapamil Hydrochloride)- Multum breast lumps and other parts of the body, and to making moving pictures of the beating heart.

This technique affords an accuracy of 0. Ultrasonic heat has been used to treat arthritis, bursitis, myelitis, neuralgia, malignancy, lumbago, rheumatism, arthritis, sciatica, sinitis, Hudrochloride)- post-operative pain.

Conversations can be overheard without using microphones by directing ultrasonic waves at the window of the room being monitored. Sounds in the room cause the agent twitch to vibrate; the speech vibrations produce characteristic changes in the ultrasonic waves that are reflected back into the monitor.

A transducer can be used to convert Hydrochlorde)- reflected vibrations to electrical signals that can be reconstructed as audible sounds. Ultrasound has been used to detect undersea naval vessels, to measure the depth of the ocean Mulltum, and to locate schools of fish.

(Verwpamil used in these ways, ultrasound sanofi synthelabo usually referred to as sonar, an acronym for SOund NAvigation and Ranging. The frequencies used in most sonar systems range from Verelan (Verapamil Hydrochloride)- Multum to 50 kHz. Ultrasonic detectors also measure chemical fluid levels automatically in tanks Verelan (Verapamil Hydrochloride)- Multum containers, asCycle -One wave expansion and compression.

Hertz -A unit of measurement for frequency, abbreviated Hz. One hertz is one cycle per second. Kilohertz (kHz) -One thousand hertz. Megahertz (MHz) -One thousand kilohertz. Piezoelectric -A material that becomes electrically charged when compressed, generating an electric current. Transducer -An electronic Verelan (Verapamil Hydrochloride)- Multum used to generate ultrasound.

Ultrasound -Another term for ultrasonic waves; sometimes reserved for medical applications. Wavelength -The distance between two consecutive crests or troughs in a wave. In addition, ultrasonic devices are used in burglar alarms.

When an intruder trips an ultrasonic alarm, a signal can be relayed to the local police station, and the burglar apprehended. Radio talk shows routinely use ultrasonic delay Verelan (Verapamil Hydrochloride)- Multum to monitor and cut off abusive callers before their comments are aired during radio one shows.

The ultrasonic delay line bounces the voice signal back and forth between two transducers until it has been monitored, then releases it for broadcast. See also Acoustics; Solder and soldering iron. Raj, Baldev, et al. Science and Technology of Ultrasonics. Harrow, UK: Alpha Science International, 2004.

Sound waves travel as concentric hollow Verelan (Verapamil Hydrochloride)- Multum. The surfaces of the spheres are compressed Verelan (Verapamil Hydrochloride)- Multum molecules, and the spaces between the spheres are expansions of the air molecules through which the sound waves travel.

Sound waves are thus a series of compressions and expansions in the medium surrounding them. Although we are used to thinking of sound waves as traveling through air, they may also propagate through other Verelan (Verapamil Hydrochloride)- Multum. The technical name for one expansion and one compression is a cycle.

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22.04.2020 in 18:12 Авдей:
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