Results 211 to 220 of about 14,900 (257)

Ultrasonic cavitation to prepare ECM hydrogels

Acta Biomaterialia, 2020
Hydrogels composed of extracellular matrix (ECM) have been used as a substrate for 3D organoid culture, and in numerous preclinical and clinical applications to facilitate repair and reconstruction of a variety of tissues. However, these ECM hydrogel materials are fabricated using lengthy methods that have focused on enzymatic digestion of the ECM with
George S. Hussey, David G. Nascari, Lindsey T. Saldin, Brian Kolich, Yoojin C. Lee, Raphael J. Crum, Salma O. El-Mossier, William D'Angelo, Jenna L. Dziki, Stephen F. Badylak   +9 more
openaire   +2 more sources

Cavitation produced by Ultrasonics

Proceedings of the Physical Society. Section B, 1950
The problem of cavitation produced by ultrasonic vibration is examined theoretically. Equations are developed which describe the motion of a gas-filled cavitation bubble in a liquid medium subjected to alternating pressure; the case of an empty cavity is also considered Information is obtained concerning the distribution of fluid pressures and ...
B E Noltingk, E A Neppiras
openaire   +1 more source

The effect of ultrasonic cavitation on protein antigenicity

The Journal of the Acoustical Society of America, 1976
The antigenicity and enzyme activity of dilute solutions of RNAse exposed to ultrasonic cavitation have been measured as a function of exposure time. The rate of decrease of antigenicity was one-eighth of the rate of enzyme activity loss.
J H, Edwards, C J, James, W T, Coakley, R C, Brown   +3 more
openaire   +2 more sources

Evidence for ultrasonically induced cavitation in vivo

Physics in Medicine & Biology, 1981
The possibility of stable bubbles being produced during ultrasonic irradiation of a guinea-pig hind limb, has been examined using a pulse echo ultrasonic imaging technique, that can visualise, within a cross-section of the limb, both moving and stationary bubbles of diameters down to 10 mu m (Beck et al. 1978).
G R, ter Haar, S, Daniels
openaire   +2 more sources

Cavitation Produced by Ultrasonics: Theoretical Conditions for the Onset of Cavitation

Proceedings of the Physical Society. Section B, 1951
An attempt is made to define theoretically the conditions for the appearance of cavitation in liquids subjected to alternating pressure changes. It is found that cavitation is restricted to a definite range of variations of the following parameters: (i) alternating pressure amplitude, (ii) frequency of the pressure wave, (iii) radius of the bubble ...
E A Neppiras, B E Noltingk
openaire   +1 more source

Ultrasonic transducer with low cavitation

The Journal of the Acoustical Society of America, 2002
An ultrasonic sonar transducer ( 10 ) for facilitating transmission and reception of sonar signals, particularly at high speeds. The sonar transducer includes a transducer element ( 12 ) and a transducer housing ( 14 ). The housing includes a bottom wall ( 34 ) that is continuously curved with no major portion thereof parallel to the bottom face of the
John Whiteside, Craig Mehan
openaire   +1 more source

A cell for ultrasonic cavitation experiments

Journal of Physics E: Scientific Instruments, 1968
A cell for ultrasonic irradiation of liquids, employed in sonoluminescence experiments, is described. The cell has been used in a frequency range 04-3 MHz with hydrostatic pressure variations from 10−3 to 3 atm, temperatures ranging from -40 to +90°C and maximum average sound energy density corresponding to the intensity of a progressive wave beam of ...
G Iernetti, A Barattini
openaire   +1 more source

Chemical Dosimetry of Ultrasonic Cavitation

1981 Ultrasonics Symposium, 1981
meters to evaluate the efficacy of various solvents in producing cavitational sonochemistry. Aqueous and alcoholic solvent systems-are easily standardized using the oxidation of I to 13 by spectrophotometry. The more common addition of CC14 in order to increase rates of 1) production dramatically reduces the reproducibility of this system, which in our
K.S. Suslick, P.F. Schubert, J.W. Goodale   +2 more
openaire   +1 more source

Ultrasonic Cavitation Thresholds in Water

The Journal of the Acoustical Society of America, 1954
The temperature dependence of the minimum sound pressure needed to produce cavitation in gassy water has been measured over a range of 0 to 30°C. Both plane progressive and focused waves of frequency one megacycle per second were used. The cavitation pressure threshold Pc is not a linear function of temperature, and increases by a factor of 2.5 between
W. Connolly, F. E. Fox
openaire   +1 more source

Ultrasonic cavitation induced by neutrons

Nuclear Instruments and Methods, 1963
Neutrons from a Pu-Be source nucleate cavitation in the liquid CC1F3 (Preon 11) when it is excited with ultrasonic pressure waves corresponding to ±5 atm at 25 kHz. The bubbles grow to visible size within one ultrasonic period and disappear in a few tens of cycles. Standing-wave bubble patterns were observed.
B. Hahn, R. N. Peacock
openaire   +1 more source