Results 61 to 70 of about 32,614 (207)

Measurement of pressure and assessment of cavitation for a 22.5-kHz intra-arterial angioplasty device [PDF]

open access: yes, 1996
This study was performed to understand better the mechanisms of action of an (22.5 kHz) ultrasonic wire catheter device used to remove atheromatous plaque in diseased blood vessels (ultrasonic angioplasty).
Everbach, E. Carr, Makin, I. R. S.
core   +2 more sources

Cavitation cloud formation and surface damage of a model stone in a high-intensity focused ultrasound field

open access: yesUltrasonics Sonochemistry
This work investigates the fundamental role of cavitation bubble clouds in stone comminution by focused ultrasound. The fragmentation of stones by ultrasound has applications in medical lithotripsy for the comminution of kidney stones or gall stones ...
Luc Biasiori-Poulanges   +2 more
doaj   +1 more source

Prediction of far-field acoustic emissions from cavitation clouds during shock wave lithotripsy for development of a clinical device

open access: yes, 2013
This study presents the key simulation and decision stage of a multi-disciplinary project to develop a hospital device for monitoring the effectiveness of kidney stone fragmentation by shock wave lithotripsy (SWL).
Cunningham KB   +9 more
core   +1 more source

New type of vulnerability curve gives insight in the hydraulic capacitance and conductivity of the xylem [PDF]

open access: yes, 2013
Drought vulnerability of trees and other woody plants is much debated in the context of climate change, which creates a high interest in understanding plant water relations.
Baert, Annelies   +4 more
core   +1 more source

Intensification of oxidation capacity using chloroalkanes as additives in hydrodynamic and acoustic cavitation reactors [PDF]

open access: yes, 2008
The effect of the presence and absence of the chloroalkanes, dichloromethane (CH2Cl2), chloroform (CHCl3) and carbon tetrachloride (CCl4) on the extent of oxidation of aqueous I- to I3- has been investigated in (a) a liquid whistle reactor (LWR ...
Bremner, David H.   +5 more
core   +3 more sources

Ultrasonic wave propagation in cylindrical vessels and implications for ultrasonic reactor design [PDF]

open access: yes, 2010
Reactors in which processes are enhanced by ultrasound are hampered by the lack of a theoretical framework on their design. Simulation results of ultrasonic wave propagation in a cylindrical geometry are presented in this work, which are then used to ...
Gachagan, A.   +3 more
core   +1 more source

Effects of sub-atmospheric pressure and dissolved oxygen concentration on lesions generated in ex vivo tissues by high intensity focused ultrasound

open access: yesBioMedical Engineering OnLine, 2021
Background Acoustic cavitation plays an important role in the medical treatment using high-intensity focused ultrasound (HIFU), but unnecessarily strong cavitation also could deform the morphology and enlarge the size of lesions.
Min He   +5 more
doaj   +1 more source

Effects of surface tension on the dynamics of a single micro bubble near a rigid wall in an ultrasonic field

open access: yesUltrasonics Sonochemistry, 2021
Acoustic cavitation is a very important hydrodynamic phenomenon, and is often implicated in a myriad of industrial, medical, and daily living applications.
Hao Wu   +5 more
doaj   +1 more source

Cavitation Scaling Experiments with Axisymmetric Bodies [PDF]

open access: yes, 1992
Several experiments by Ceccio and Brennen (1991, 1989) and Kumar and Brennen (1992, 1991) have closely examined the interaction between individual cavitation bubbles and the boundary layer, as well as statistical properties of the acoustical signals ...
Brennen, Christopher E.   +3 more
core  

Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions [PDF]

open access: yes, 2012
Water in plant xylem is often superheated, and therefore in a meta-stable state. Under certain conditions, it may suddenly turn from the liquid to the vapor state. This cavitation process produces acoustic emissions.
Bilmes, G. M.   +2 more
core   +6 more sources

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