Abstract：
:Exposure of Petunia hybrida cell suspensions to ultrasound at a frequency of 2.43 MHz in a standing wave field at an energy density of 70 Jm-3 (pressure amplitude of 0.78 MPa) decreased their mean viability to 35% after 20 min of sonication. A comparison of propagating wave and standing wave treatments at equal frequency (2.15 MHz) and energy density (8.5 Jm-3) showed, in the first case, a rapid decline in mean viability of cells (to 30% after 10 min of sonication) and, in the second case, a retaining of the initial viability (95%), respectively. Cells sonicated 4 days after subculture were more sensitive than cells sonicated 2 or 6 days after transfer to new culture medium. It was concluded that cellular viability depends primarily on the acoustic energy density, the exposure time, and the mechanical properties of the cells determined by age. As a consequence of the trapping of cells in the anti-node planes of the standing wave, propagating wave fields reduced cellular viability compared with standing wave fields at equal energy density.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Böhm H,Anthony P,Davey MR,Briarty LG,Power JB,Lowe KC,Benes E,Gröschl Mdoi
10.1016/s0041-624x(99)00166-3subject
Has Abstractpub_date
2000-03-01 00:00:00pages
629-32issue
1-8eissn
0041-624Xissn
1874-9968pii
S0041-624X(99)00166-3journal_volume
38pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:Shear-Horizontally (SH) polarized, ultrasonic, guided wave modes are considered in order to infer changes in the adhesive properties at several interfaces located within an adhesive bond joining two metallic plates. Specific aluminium lap-joint samples were produced, with different adhesive properties at up to four in...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.03.002
更新日期：2014-09-01 00:00:00
abstract：:We present a method to generate sub-microsecond quasi-unipolar pressure pulses. Our approach is based on the laser irradiation of a thin copper wire submerged in water. The acoustic waveforms were recorded using two different, well characterized, wideband detection techniques: piezoelectric and optical interferometry....
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.05.002
更新日期：2019-09-01 00:00:00
abstract：:The focus of contrast-enhanced ultrasound research has developed beyond visualizing the blood pool and its flow to new areas such as perfusion imaging, drug and gene therapy, and targeted imaging. In this work comparison between the application of polymer- and phospholipid-shelled ultrasound contrast agents (UCAs) for...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.05.006
更新日期：2011-01-01 00:00:00
abstract：:Many sparse signal representation (SSR) algorithms have been developed in the past decade. The advantages of SSR such as compact representations and super resolution lead to the state of the art performance of SSR for processing ultrasonic non-destructive evaluation (NDE) signals. Choosing a suitable SSR algorithm and...
journal_title：Ultrasonics
pub_type： 杂志文章,评审
doi：10.1016/j.ultras.2011.10.001
更新日期：2012-03-01 00:00:00
abstract：:In a recent report [F.G. Mitri, Z.E.A. Fellah, Ultrasonics 51 (2011) 719-724], it has been found that the instantaneous axial force (i.e. acting along the axis of wave propagation) of a Bessel acoustic beam centered on a sphere is only determined for the fundamental order (i.e. m=0) but vanishes when the beam is of vo...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2011.07.009
更新日期：2012-01-01 00:00:00
abstract：:The properties of optical to acoustic transduction of semiconductor superlattices have been explored for several years in the sub terahertz frequency range. Using femtosecond laser pulses focused on these structures, acoustic modes are excited with a frequency related to the periodicity of the structure stacking. We h...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.07.009
更新日期：2015-02-01 00:00:00
abstract：:The acousto-optic interaction with leaky surface acoustic wave radiation into the bulk of YX-cut LiTaO(3) crystals has been investigated. The light incidence and diffraction angles corresponding to the strongest acousto-optic interaction were calculated and measured as functions of the acoustic wave frequency. The dep...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2011.12.004
更新日期：2012-07-01 00:00:00
abstract：:Aluminium sheet thickness has been calculated from ultrasonic data obtained using a send-receive, radially polarised electromagnetic acoustic transducer (EMAT). Sheets in the thickness range between 0.1 and 0.5 mm have been measured using this non-contact approach at a stand-off of up to 1.5 mm. Normal incidence shear...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(01)00083-x
更新日期：2001-10-01 00:00:00
abstract：:For coupled structures surrounded by heavy fluids, it is difficult to obtain dispersion curves from an eigenvalue analysis, because the external fluid term in the coupled equation includes transcendental functions for frequency and wavenumber. Thus, in this study, the acoustic mass of the external fluid was approximat...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.12.009
更新日期：2018-04-01 00:00:00
abstract：:Elastography is an imaging technique based on strain estimation in soft tissues under quasi-static compression. The stress is usually created by a compression plate, and the target is imaged by an ultrasonic linear array. This configuration is used for breast elastography, and has been investigated both theoretically ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00228-7
更新日期：2002-05-01 00:00:00
abstract：:The importance of the analysis of the radiofrequency signal is by now recognized in the field of tissue characterization via ultrasound. The RF signal contains a wealth of information and structural details that are usually lost in the B-Mode representation. The HyperSPACE (Hyper SPectral Analysis for Characterization...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.02.010
更新日期：2016-05-01 00:00:00
abstract：:Investigation was carried out to study the effects of maximum aggregate size (MAS) (12.5mm, 19.0mm, 25.0mm, 37.5mm, and 50.0mm) on ultrasonic pulse velocity (UPV) of concrete. For investigation, first class bricks were collected and broken to make coarse aggregate. The aggregates were tested for specific gravity, abso...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.04.006
更新日期：2016-07-01 00:00:00
abstract：:The dispersion behavior of waves in multiferroic plates with imperfect interfacial bonding has been investigated via the method of reverberation-ray matrix, which is directly established from the three-dimensional equations of magneto-electro-elasticity in the form of state space formalism. A generalized spring-layer ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2011.07.004
更新日期：2012-01-01 00:00:00
abstract：:Most methods used to measure the thickness of thin liquid or solid surface films and coatings need access to the coated surface. In this work reflected ultrasonic pulses were used to measure a coating thickness from a solid back face. Piezoelectric transducers on the solid back face emitted ultrasound waves and receiv...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106291
更新日期：2021-02-01 00:00:00
abstract：:Acoustic scattering phenomena from complex immersed elastic shells are studied by high-speed Schlieren visualization for spark-generated spherical quasi-Dirac excitations. The situations considered are air-filled cylindrical shells under normal insonification and air-filled cylindrical shells soldered at one end with ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00165-1
更新日期：2000-03-01 00:00:00
abstract：:The accurate estimation of time of flight (TOF) of an ultrasonic signal is essential in ultrasonic non-destructive testing (NDT). A novel method for TOF estimation based on the short-time Fourier transform (STFT) is proposed in this paper. Firstly, the time and frequency components of ultrasonic echoes are represented...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106104
更新日期：2020-04-01 00:00:00
abstract：:An ultrasonic method of acoustic parameter evaluation for porous materials saturated by air (or any other gas) is discussed. The method is based on the evolution of speed of sound and the attenuation inside the material when the static pressure of the gas saturating the material is changed. Asymptotic development of t...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(00)00062-7
更新日期：2001-04-01 00:00:00
abstract：:In this paper the behaviour of strongly nonlinear waves in axisymmetric resonators is experimentally and numerically studied. Experiments are carried out in a cylindrical cavity, which transversal dimension is bigger than the longitudinal one, excited by a narrow band transducer. The quality factor and displacement am...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2005.02.001
更新日期：2005-08-01 00:00:00
abstract：:The results of computer simulation taking into account the linear and nonlinear material constants have been presented. Study of the influence of external uniaxial mechanical stress on the dispersive characteristics of elastic waves in piezoelectric structures as "La3Ga5SiO14/fused silica" has been executed. The compa...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.07.007
更新日期：2015-01-01 00:00:00
abstract：:3D ultrasound is a promising imaging modality for clinical diagnosis and treatment monitoring. Its cost is relatively low in comparison with CT and MRI, no intensive training and radiation protection is required for its operation, and its hardware is movable and can potentially be portable. In this study, we developed...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.05.003
更新日期：2005-01-01 00:00:00
abstract：:The objective of this study was to examine the potential of ultrasonic velocity as a rapid and nondestructive method to predict the dimensional stability of oak (Quercus petraea (Mattuschka) Lieblein) and chestnut (Castanea sativa Mill.) that are commonly used in flooring industry. Ultrasonic velocity, specific gravit...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.11.007
更新日期：2016-03-01 00:00:00
abstract：BACKGROUND:Generalized coherence factor (GCF) can be adaptively estimated from channel data to suppress sidelobe artifacts. Conventionally, Fast Fourier Transform (FFT) is utilized to calculate the full channel spectrum and suffers from high computation load. In this work, autocorrelation (AR)-based algorithm is utiliz...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.07.015
更新日期：2016-12-01 00:00:00
abstract：:The purpose of this research was to develop, implement and verify a measurement technique enabling rapid and dependable characterization of ultrasound hydrophone probes beyond 20 MHz. The technique employs focused acoustic sources to optimize signal-to-noise ratio and spatial averaging correction model to account for ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00166-x
更新日期：2002-05-01 00:00:00
abstract：:The Mössbauer and X-rays analysis of as-received Fe-powder and Fe-powder mechanically alloyed with C using high power ultrasonics were carried out. The powder blend of Fe-powder and graphite was processed in He environment during 5 to 50 h. The dissolution of carbon in iron particles and inhomogeneous distribution of ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.01.002
更新日期：2004-04-01 00:00:00
abstract：:The paper presents an equivalent circuit model of the polymer coated surface acoustic wave (SAW) resonators by combining coupling-of-mode (COM) description of SAW resonators and perturbation calculation of SAW propagation under polymer loading. An expression for the motional load produced by polymer coating is deduced...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.12.006
更新日期：2011-07-01 00:00:00
abstract：:In ultrasonic non-destructive testing of materials with a coarse-grained structure the scattering from the grains causes backscattering noise, which masks flaw echoes in the measured signal. Several filtering methods have been proposed for improving the signal-to-noise ratio. In this paper we present a comparative stu...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2009.05.010
更新日期：2009-12-01 00:00:00
abstract：:Our objective was to investigate whether hemorrhage control can be achieved faster when high-intensity focused ultrasound (HIFU) is applied in the presence of ultrasound contrast agents (UCA) as compared to HIFU only application. Incisions (3 cm long and 0.5 cm deep) were produced in the livers of anesthetized rabbits...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.07.018
更新日期：2006-12-01 00:00:00
abstract：:A coordinated theoretical, numerical and experimental study is carried out in an effort to interpret the characteristics of propagating guided Lamb wave modes in presence of a high-density (HD) core region in a honeycomb composite sandwich structure (HCSS). Initially, a two-dimensional (2D) semi-analytical model based...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.05.025
更新日期：2016-09-01 00:00:00
abstract：:In cancellous bone, longitudinal waves often separate into fast and slow waves depending on the alignment of bone trabeculae in the propagation path. This interesting phenomenon becomes an effective tool for the diagnosis of osteoporosis because wave propagation behavior depends on the bone structure. Since the fast w...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2008.04.011
更新日期：2008-11-01 00:00:00
abstract：:The electromagnetic acoustic transducers (EMATs) with a meander-line coil possess the capability of generating Lamb waves carrying multiple wavelengths, and the characteristics of multiple wavelengths is analyzed by developing a spatial transversal filter model for the EMAT. It is shown that the characteristics is due...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.09.003
更新日期：2014-02-01 00:00:00
