Acoustic pressure amplitude thresholds for rectified diffusion in gaseous microbubbles in biological tissue
نویسندگان
چکیده
منابع مشابه
Acoustic pressure amplitude thresholds for rectified diffusion in gaseous microbubbles in biological tissue.
One of the mechanisms often suggested for the biological action of ultrasonic beams irradiating human tissues is concerned with the presence in the tissues of minute gaseous bubbles which may, under the influence of the ultrasonic field be stimulated to grow to a size a which resonance or collapse occurs with severe associated shear stresses. The evidence for the existence of microbubbles in ti...
متن کاملAcoustic pressure and particle motion thresholds in six sciaenid fishes.
Sciaenid fishes are important models of fish sound production, but investigations into their auditory abilities are limited to acoustic pressure measurements on five species. In this study, we used auditory brainstem response (ABR) to assess the pressure and particle acceleration thresholds of six sciaenid fishes commonly found in Chesapeake Bay, eastern USA: weakfish (Cynoscion regalis), spott...
متن کاملEarthquakes, volcanoes, and rectified diffusion
Rectified diffusion is a mechanism by which a strain wave can rapidly pump volatiles into a bubble and therefore increase the pressure in a closed syste~. The dynamic strain of either distant regional tectonic earthquakes or local volcanic tremor can be translated to static strain inside a magma chamber via this pro·cess. We formulate a theory appropriate to the conditions of a magma chamber an...
متن کاملAcoustic Pattering of Microspheres and Microbubbles in an Acoustic Tweezers
We describe the construction of an ultrasonic device capable of micro-patterning a range of microscopic particles for bioengineering applications such as targeted drug delivery. The device is formed from seven ultrasonic transducers positioned around a heptagonal cavity. By exciting two or three transducers simultaneously, lines or hexagonal shapes can be formed with microspheres, emulsions and...
متن کاملImproved methods for measurement of gaseous microbubbles during extracorporeal circulation.
The detection and quantification of gaseous microbubbles in the arterial line of the extracorporeal circuit (ECC) are very important aims for quality assurance of perfusion. A system that allows a continuous measurement of microbubble distribution in the range of 10 and 120 microm was tested. The two-channel ultrasonic bubble counter (UBC) was based on a 2-MHz ultrasound Doppler system with pro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1981
ISSN: 0001-4966
DOI: 10.1121/1.385540