Results 261 to 270 of about 214,674 (299)

High energy laser beam steering with periodic shock waves

SPIE Proceedings, 2010
Atmospheric density gradients bend light as can be seen with naturally occurring mirages. Shock waves also produce density changes that bend or refract light. While a single shock front from a supersonic projectile refracts light only on the order of hundreds of arcseconds, theoretical results indicate that beam deflections of thirty or more degrees ...
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Shock-wave production of nanoparticles during high-energy ion sputtering

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2003
Abstract Several previous studies have shown that the size distributions of smaller nanoparticles (n⩽40 where n is the number of atoms in a given cluster) generated by ion sputtering obey an inverse power law, with an exponent varying between −8 and −4, dependent upon the total sputtering yield.
L.E. Rehn, R.C. Birtcher, P.M. Baldo, A.W. McCormick, L. Funk   +4 more
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Reduction of high-energy shock-wave-induced renal tubular injury by selenium

Urological Research, 1999
In shock-wave-induced renal injury cavitation-generated free radicals play an important role. Using an in vitro model with Madin-Darby canine kidney (MDCK) cells, we investigated the influence of selenium, a free radical scavenger, in shock-wave-induced tubular cell injury. Suspensions of MDCK cells (33 x 10(6) cells/ml) were placed in small containers
W L, Strohmaier, S, Lahme, P M, Weidenbach, K H, Bichler   +3 more
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The effect of High energy shock waves (HESW) on human bone marrow

Urological Research, 1988
The effect of High energy shock waves (HESW) on the viability and proliferation of normal human bone marrow cells was evaluated. A dose dependent increase in cytotoxicity with an increase in the number of HESW was demonstrated. In general 700 HESW immediately reduced the cell viability of bone marrow cells by 50%.
C, Yang, W D, Heston, S, Gulati, W R, Fair   +3 more
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High-energy shock waves pyrotherapy. A new concept in extracorporeal tumour therapy

Surgical Oncology, 1993
High-intensity shock waves (HISW) waves can produce rapid and intense tissue heating. We have studied a novel device capable of simultaneous shock wave generation, focusing and extracorporeal delivery along with imaging of the proposed target. Shock waves are generated by piezo-electric crystals and target a focal point of 10 x 2 mm.
A, Darzi, R, Goldin, P J, Guillou, J R, Monson   +3 more
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Free Radical Production by High Energy Shock Waves-Comparison With Ionizing Irradiation

Journal of Urology, 1988
Fricke chemical dosimetry is used as an indirect measure of the free radical production of ionizing irradiation. We adapted the Fricke ferrous sulfate radiation dosimeter to examine the chemical effects of high energy shock waves. Significant free radical production was documented.
T R, Morgan, V P, Laudone, W D, Heston, L, Zeitz, W R, Fair   +4 more
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Optical imaging of shock waves produced by a high-energy electromagnetic transducer

Physics in Medicine and Biology, 1993
An electromagnetic acoustic transducer (EMAT) and acoustic lens have been constructed to provide reproducible and well characterized acoustic shock waves in water. The peak pressure amplitude variation for the unfocused and focused shock waves was found to be within +/- 5%.
M T, Carnell, R D, Alcock, D C, Emmony
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High-Energy Shock Waves Alter Cytosolic Calcium Mobilization in Single MDCK Cells

Nephron, 1998
The damaging effect of shock waves on intracellular calcium homeostasis in renal tubular cells has not been investigated previously. We have examined the effects of shock waves on Madin Darby canine kidney (MDCK) cells by determining the release of two cellular enzymes: glutamate oxalactate transferase (GOT) and lactate dehydrogenase (LDH); and both ...
C R, Jan, J K, Huang, C J, Tseng
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In vitro investigations on cellular damage induced by high energy shock waves

Ultrasound in Medicine & Biology, 1992
Single-cell suspensions of the prostate carcinoma cell line PCA were exposed to electromagnetically generated ultrasound shock waves (source and focusing lens identical to those used in the commercially available lithotripor Lithostar Plus). Cell loss of up to 40% occurred in sample tubes containing air.
P, Steinbach, F, Hofstädter, H, Nicolai, W, Rössler, W, Wieland   +4 more
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High energy focused shock wave therapy accelerates bone healing

Veterinary and Comparative Orthopaedics and Traumatology, 2015
SummaryObjectives: To evaluate the influence of shock wave therapy (SWT) on radiographic evidence of bone healing after tibial plateau leveling osteotomy (TPLO).Methods: Healthy dogs between two to nine years of age that underwent TPLO were randomly assigned to receive either electro- hydraulic SWT (1,000 shocks) or sham treatment (SHAM).
N R, Kieves, C S, MacKay, K, Adducci, S, Rao, C, Goh, R H, Palmer, F M, Duerr   +6 more
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