4,566 Hits in 3.0 sec

Chandra ACIS-S imaging spectroscopy of anomalously faint X-ray emission from Comet 103P/Hartley 2 during the EPOXI encounter

C.M. Lisse, D.J. Christian, S.J. Wolk, K. Dennerl, D. Bodewits, M.R. Combi, S.T. Lepri, T.H. Zurbuchen, J.Y. Li, N. Dello-Russo, M.J.S. Belton, M.M. Knight
2013 Icarus (New York, N.Y. 1962)  
Charge transfer reactions between the ions of the stellar winds and material of the born-again ejecta has also been considered as a possible mechanism for the production of diffuse X-ray emission, and  ...  bubble confining the fast stellar wind seems implausible.  ...  Origin of the Diffuse X-ray Emission We consider two different mechanisms for the production of the diffuse X-ray emission detected in A 30: shocked stellar wind and charge-exchange reactions.  ... 
doi:10.1016/j.icarus.2012.09.025 fatcat:tdwzs7kbkzagpkbtncsqqrzo7u

Study on bubble sizes in a down-flow liquid jet gas pump

Y L Wu, Q J Xiang, H Li, S X Chen
2012 IOP Conference Series: Earth and Environment  
The mixing tube and diffuser are made of transparent Perspex for visual observation.  ...  Bubble diameters in the diffuser have been measured by photographic and capillary method at different operating conditions.  ...  Xiang Qingjiang for providing useful suggestions and comments.  ... 
doi:10.1088/1755-1315/15/5/052017 fatcat:a7fl5maldzbzxg6lmq4dap3f74

Experimental Study on the Unsteady Characteristics and the Impact Performance of a High-Pressure Submerged Cavitation Jet

Yongfei Yang, Wei Li, Weidong Shi, Ling Zhou, Wenquan Zhang
2020 Shock and Vibration  
after the bubble cloud sheds off.  ...  bubbles are only distributed in a very small range of the nozzle outlet.  ...  Under the combined action of diffusion and collapse, the area of the bubble cloud in the shedding segment decreased rapidly.  ... 
doi:10.1155/2020/1701843 fatcat:mrawk7fcrjgltpjfwr2qxxn2ny

Physical mechanisms of the therapeutic effect of ultrasound (a review)

M. R. Bailey, V. A. Khokhlova, O. A. Sapozhnikov, S. G. Kargl, L. A. Crum
2003 Acoustical Physics  
Similarly, shock waves from a lithotripter penetrate the body to comminute kidney stones, and transcutaneous ultrasound enhances the transport of chemotherapy agents.  ...  Other mechanical effects from ultrasound appear to stimulate an immune response, and bubble dynamics play an important role in lithotripsy and ultrasound-enhanced drug delivery.  ...  We wish to thank, for helpful discussions, the members of CIMU, the members of the Department of Acoustics of MSU, the Consortium for Shock Waves in Medicine (CSM), the experts in HIFU and physics of intense  ... 
doi:10.1134/1.1591291 fatcat:b2cmanb46jd23ai22yygo5zjwu

Merging microfluidics and sonochemistry: towards greener and more efficient micro-sono-reactors

David Fernandez Rivas, Pedro Cintas, Han J. G. E. Gardeniers
2012 Chemical Communications  
the iconic image of chips emerges.  ...  for process intensification, safer and often faster protocols, reliable scale-up, and possibility of performing multiphase reactions.  ...  Zijlstra for supplying particle flow videos and B. Verhagen with assistance in the streak images processing. R. Groote and R. T. M.  ... 
doi:10.1039/c2cc33920j pmid:23001310 fatcat:wezeykbypvf5hhcp4tfv2qvm3u

Comparison of ultrasound and LIB generated cavitation bubble

Darina Jasikova, Petr Schovanec, Michal Kotek, Milos Muller, Vaclav Kopecky, P. Dančová
2017 EPJ Web of Conferences  
There is described the setup for ultrasound cavitation effecting the sessile bubble as well as random generated and moving bubble.  ...  The most of method are based on spark to induced superheat limit of liquid.  ...  The results of this project LO1201 were obtained through the financial support of the Ministry of Education, Youth and Sports in the framework of the targeted support of the "National Programme for Sustainability  ... 
doi:10.1051/epjconf/201714302044 fatcat:56sq42cy3jdb7ftreefxibpgki

Ultrasound artificially nucleated bubbles and their sonochemical radical production

David Fernandez Rivas, Laura Stricker, Aaldert G. Zijlstra, Han J.G.E. Gardeniers, Detlef Lohse, Andrea Prosperetti
2013 Ultrasonics sonochemistry  
Experimental evidence of shock wave emission from the bubble clusters, deformed bubble shapes and jetting events that might lead to surface erosion are presented.  ...  We have determined the size distribution of bubbles ejected from one, two and three pits, for three different pressure amplitudes and correlated them with sonochemical OH Å radical production.  ...  Martinez (image processing) for their technical support and also Prof.  ... 
doi:10.1016/j.ultsonch.2012.07.024 pmid:22939003 fatcat:iembtecmqfaphowk2lyspamed4

Myocardial Contrast Agents – Safety Considerations and Clinical Efficacy in Stress Echocardiography

Anca Maier, Maria Mihaela Opris, Voichita Sirbu, Klara Brinzaniuc
2016 ARS Medica Tomitana  
stress echocardiography have suboptimal echocardiographic images.  ...  Unfortunately, a significant proportion of studies have highlighted the considerable technically difficultly in producing diagnostic images due to a poor acoustic window and more than 33% of patients undergoing  ...  The most severe forms are associated with bronchospasm, shock (hypotension, hypoxemia), and other reactions include urticaria, palmar erythema, back pain (more common with Definity), central nervous reactions  ... 
doi:10.1515/arsm-2016-0049 fatcat:gzu2i7l2avct3o5dgtf4l7xevu

Design and analysis of pioneering high supersonic axial turbines

G. Paniagua, M.C. Iorio, N. Vinha, J. Sousa
2014 International Journal of Mechanical Sciences  
A fundamental issue in supersonic passages is to ensure the normal shock at the start of the engine is swallowed through the turbine passages, namely the turbine passage is started.  ...  The design procedure was based on the method of characteristics, converting the inlet uniform flow into a vortex flow field, such that the adequate deflection is inflicted to the supersonic flow.  ...  Acknowledgments The authors would like to acknowledge Oscar Martinez Moralo for his work regarding the off-design performance of the turbine passage and John McClean for his advise during the preparation  ... 
doi:10.1016/j.ijmecsci.2014.08.014 fatcat:p62htc422nc2lm5j7kyjsgjcqq

Interplay Between Mechanochemistry and Sonochemistry [chapter]

Pedro Cintas, Giancarlo Cravotto, Alessandro Barge, Katia Martina
2014 Topics in current chemistry  
David Fernández-Rivas (University of Twente, The Netherlands, and BubClean) for his stimulating feedback and permission to reproduce Figure 4 .  ...  During the compression phase, the gas inside the bubble is at a pressure higher than the equilibrium value and diffuses from the bubble.  ...  Surface damage can be caused by bubble cavitation and shock waves on noncoinage metals.  ... 
doi:10.1007/128_2014_623 pmid:25860254 fatcat:26drdgaeuzgmhffqbmzlpokgoq

Luminescence from cavitation bubbles deformed in uniform pressure gradients

Outi Supponen, Danail Obreschkow, Philippe Kobel, Mohamed Farhat
2017 Physical review. E  
Luminescence was detected for bubbles of maximum radii within the previously uncovered range R_0 =1.5-6 mm for laser-induced bubbles.  ...  By varying the bubble size, driving pressure and the perceived gravity level aboard parabolic flights, we probed the limit from aspherical to highly spherical bubble collapses.  ...  Centimetric bubbles generated by a spark or expanded through a chemical reaction may luminesce for tens of microseconds [24, 27] .  ... 
doi:10.1103/physreve.96.033114 pmid:29347011 fatcat:cueg3heyujbqra3755eq6abwfu

Massive gas embolism secondary in the use of intraoperative hydrogen peroxide: still use to lavage with this liquid?

Zine El Abidine, Hatim Abdedaim, Driss Omari
2013 The Pan African Medical Journal  
Diagnosis is based on clinical variations in a conscious patient at the time of use, confirmed by echocardiology if available.  ...  If O2 bubbles produced after catalysis of H2O2 diffuse into the venous circulation, it may be responsible for a morbidity or even mortality.  ...  Figure 1 : 1 Apical four-chamber 2D echocardiography centered on the right cavities showing massive gas bubbles, image taken 50 seconds after the onset of clinical signs of embolism.  ... 
doi:10.11604/pamj.2013.16.124.3499 pmid:24839532 pmcid:PMC4021982 fatcat:zajfdm5p3nfodpwestk7efytgu

Aluminum nanocomposites for elevated temperature applications

C. Borgonovo, D. Apelian, M. M. Makhlouf
2011 JOM: The Member Journal of TMS  
It involves the reaction of the molten aluminum with a nitrogen-bearing gas injected through the melt at around 1273 K. AlN particles are expected to form through this in situ reaction.  ...  Makhlouf for the incredible help in my experiments and for the additional value that his experience has provided to my work. His continuous drive towards new ideas has inspired my research.  ...  Therefore, the indirect method, based on Mg to catalyze the reaction, is more favorable for aluminum nitrides formation.  ... 
doi:10.1007/s11837-011-0030-5 fatcat:golewyiezfaufl6fxmfhc53cku

Facilitating shrimp ( Pandalus borealis ) peeling by power ultrasound and proteolytic enzyme

Tem Thi Dang, Nina Gringer, Flemming Jessen, Karsten Olsen, Niels Bøknæs, Pia Louise Nielsen, Vibeke Orlien
2018 Innovative Food Science & Emerging Technologies  
The collapse of cavitation bubbles generates physical effects such as shock wave, microjet, turbulence and shear force.  ...  pitted the shrimp shell and generated pathways for enzyme diffusion into muscle-shell attachment. multispectral imaging system (VideometerLab 3, Videometer A/S, Hørsholm).  ... 
doi:10.1016/j.ifset.2018.04.019 fatcat:vfgl73gsujdgzcyowqudgjkfvi

Role of carbon dioxide angiography in management of below knee arterial lesions

Wael Abdulghaffar, Fady Elganayni, Hala Aly Saleh, Ahmed H. Abou-Issa, Osman Abouelcibaa
2012 The Egyptian Journal of Radiology and Nuclear Medicine  
Published results have varied considerably with respect to the validity of imaging this anatomy.  ...  Many practitioners express concern about the adequacy of imaging using CO2 in the lower extremities, particularly in the distribution of the popliteal artery and below (5).  ...  All lesions show similar findings on CO 2 and WSCM images (Figs. 2 and 3) . Regarding the 2nd group, diagnosis and angioplasty were based on CO 2 images alone.  ... 
doi:10.1016/j.ejrnm.2012.09.008 fatcat:rxhkc5ej2rb5znun5gmt4fv47y
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