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Sonication (0):
Recent article
Sonication
Abstract
With the ability to form a nano-sized fibrous structure with large pore sizes mimicking the extracellular matrix (ECM), electrospinning was used to fabricate chitosan/poly(vinyl alcohol) nanofibers reinforced by single-walled carbon nanotube (SWNT-CS/PVA) for potential use in neural...
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PMID: 21702365
PDF is available here.
PDF is available here.
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Abstract
The Toll/interleukin-1 receptor (TIR) domain is a protein-protein interaction domain that is found in both animal and plant immune receptors. In animal Toll-like receptor signalling, both homotypic TIR-domain interactions between two receptor molecules and heterotypic interactions between receptors...
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PMID: 21301095
PDF is available here.
PDF is available here.
Abstract
Noninvasive monitoring of matrix development in tissue-engineered cartilage constructs would permit ongoing assessment with the ability to modify culture conditions during development to optimize tissue characteristics. In this study, chondrocytes seeded in a collagen hydrogel were e...
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PMID: 20807015
PDF is available here.
PDF is available here.
Abstract
Focused ultrasound surgery (FUS) is a completely noninvasive method of thermally destroying a target tissue while sparing adjacent tissues and organs. Treatment is relatively painless and can be carried out under conscious sedation on an out-patient basis. The combination of magnetic resonance guida...
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PMID: 20822382
PDF is available here.
PDF is available here.
Ultrasonics (50)8 2010
Abstract
Our findings suggest that endo- and exo-PpIX in S180 cells differ not only in pharmacokinetics but also in sub-cellular localizations, which may affect their sonodynamic efficacy and mechanisms of inducing cell death.
Copyright (c) 2010. Published by Elsevier B.V....
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PMID: 20580049
PDF is available here.
PDF is available here.
Journal of Endodontics (36)8 2010
Abstract
The results showed no statistically significant difference in canal or isthmus cleanliness among the 4 groups, but there was a statistically significant difference (P < .001) in canal cleanliness between the 1-mm level versus the 3-mm and 5-mm levels for all of the groups.
Published by Elsevier Inc....
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PMID: 20647098
PDF is available here.
PDF is available here.
Journal of Endodontics (36)8 2010
Abstract
Very high levels of root canal cleanliness (< or = score 3) were found for each test group with activation. For the middle and apical third, the no-activation group was significantly less effective than the three other activation groups (p < 0.05). The manual-dynamic activation group (final rinse 17...
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PMID: 20647097
PDF is available here.
PDF is available here.
Journal of Endodontics (36)8 2010
Abstract
Oscillation of the ultrasonically driven file toward the groove is more effective in removing dentin debris from the groove than oscillation perpendicular to the groove, which can be related to the fact that there is a high-velocity jet from the file tip in a single direction following the file osci...
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PMID: 20647099
PDF is available here.
PDF is available here.
Journal of Endodontics (36)8 2010
Abstract
Passive ultrasonic irrigation is more effective than the Vibringe System or syringe irrigation in removing debris. The sonic device demonstrated significantly better results than syringe irrigation in the apical root canal third.
Copyright 2010 American Association of Endodontists. Published by Els...
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PMID: 20647107
PDF is available here.
PDF is available here.
Journal of Endodontics (36)8 2010
Abstract
These in vivo results strengthen the case for a multi-visit approach to the treatment of apical periodontitis.
Copyright 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved....
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PMID: 20647087
PDF is available here.
PDF is available here.
Journal of Endodontics (36)8 2010
Abstract
A statistically significant difference was evidenced among groups (F(3) = 9.01, p < 0.001). The standard irrigation groups (NaOCl 15 and 30) showed higher microbial counts than the EA 30 group (p < 0.05). CONCLUSION: Thirty seconds of NaOCl subsonic agitation with EndoActivator appears to be slightl...
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PMID: 20647096
PDF is available here.
PDF is available here.
Abstract
A recent paper by Zinin [Phys. Rev. E 79, 021910 (2009)] regarding the dynamics of biological cells in an acoustic field draws conclusions that we find open to debate. The present paper examines these conclusions and addresses some findings.
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PMID: 20866673
PDF is available here.
PDF is available here.
Biomaterials (31)19 2010
Abstract
We develop an injectable composite system based for repeated ultrasound-triggered on-demand drug delivery. An in situ-cross-linking hydrogel maintains model drug (dye)-containing liposomes in close proximity to gas-filled microbubbles that serve to enhance release events induced by ultrasound applic...
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PMID: 20347484
PDF is available here.
PDF is available here.
Abstract
We present an approach to gain well-dispersed nanoparticles in physiological media. Therefore, a step-by-step procedure is demonstrated on two different tungsten carbide nanopowders which can be transferred to other powders. The procedure includes a comprehensive powder characterization, followed by...
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PMID: 20795896
PDF is available here.
PDF is available here.
Abstract
The spin-echo T1W images at 10 minutes post-contrast enhancement showed the best correlation with EB staining in both quantity of EB extravasation (r = 0.812; P < 0.01) and spatial distribution (r = 0.528, P < 0.01). This capability was more robust than the gradient-echo sequence. CONCLUSION: Our re...
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PMID: 20512883
PDF is available here.
PDF is available here.
Nanotechnology (21)21 2010
Abstract
This study aims to develop self-assembled poly(ethylene glycol)-poly(epsilon-caprolactone)-poly(ethylene glycol) (PEG-PCL-PEG, PECE) micelles to encapsulate hydrophobic honokiol (HK) in order to overcome its poor water solubility and to meet the requirement of intravenous administration. Honokiol lo...
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PMID: 20431208
PDF is available here.
PDF is available here.
Abstract
Temperature had a key role in increasing significantly the virucidal activity of VANTOCIL TG, reducing virus concentration by 4-log(10) within 10 minutes at 40 degrees C. The high temperature was linked to a reduction of viral aggregates despite the exposure to the biguanide. In addition, the viral...
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PMID: 20006410
PDF is available here.
PDF is available here.
Abstract
A rapid, environmental friendly and low-cost method to prepare hydroxyapatite nanoparticles is proposed. In this method, hydroxyapatite is produced in a sonicated pseudo-body solution. The sonication time was found effective in the formation of the crystalline phase of nanoparticles. In our experime...
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PMID: 20207573
PDF is available here.
PDF is available here.
Abstract
Cobalt aluminate (CoAl(2)O(4)) nanoparticles were synthesized using a precursor method with the aid of ultrasound irradiation under various preparation parameters. The effects of the preparation parameters, such as the sonochemical reaction time and temperature, precipitation agents, calcination tem...
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PMID: 20211574
PDF is available here.
PDF is available here.
Abstract
The ionic liquid 1-ethyl-3-methylimidazole acetate ([EMIM]OAc) was found to be a mild and effective catalyst for the efficient, one-pot, three-component synthesis of 2-aryl-4,5-diphenyl imidazoles at room temperature under ultrasonic irradiation. This procedure has many obvious advantages compared t...
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PMID: 20194046
PDF is available here.
PDF is available here.
Abstract
Ultrasonic degradation of parathion has been investigated in this study. At a neutral condition, 99.7% of 2.9 microM parathion could be decomposed within 30 min under 600 kHz ultrasonic irradiation at ultrasonic intensity of 0.69 W/cm(2). The degradation rate increased proportionally with the increa...
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PMID: 20303819
PDF is available here.
PDF is available here.
Abstract
Hollow calcium silicate hydrate (CSH) microspheres with diameters around 1 microm were synthesized by a surfactant-assisted sonochemical route, and the products were characterized by XRD, SEM, FETEM and BET techniques. The results suggested that the ultrasound radiation, surfactant and Ca source wer...
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PMID: 20207574
PDF is available here.
PDF is available here.
Abstract
Alkaline graphite intercalation compounds were prepared by flake graphite, potassium dichromate, concentrated sulfur acid and sodium hydroxide under ultrasound irradiation and characterized by scanning electron microscopy and X-ray diffraction. The influences of solution alkalinity, bath temperature...
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PMID: 20202883
PDF is available here.
PDF is available here.
Abstract
Mild and efficient Fischer esterification reactions of lactic acid with a variety of straight chain aliphatic alcohols, cyclohexanol and benzyl alcohol were successfully performed using two novel Brønsted acidic ionic liquids that bear an aromatic sulfonic acid group on the imidazolium or pyridiniu...
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PMID: 20226709
PDF is available here.
PDF is available here.
Abstract
Alkenyltrimethylsilanes are selectively fluorodesilated to alkenyl fluoride very readily by reaction with 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2,2,2]octane bis-tetrafluoroborate (Selectfluor) and N-fluorobenzensulfonimids at room temperature under ultrasound. In the presence of ultrasound irr...
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PMID: 20223695
PDF is available here.
PDF is available here.
Abstract
Investigation into newer routes of biodiesel synthesis is a key research area especially due to the fluctuations in the conventional fuel prices and the environmental advantages of biodiesel. The present work illustrates the use of sonochemical reactors for the synthesis of biodiesel from waste cook...
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PMID: 20303314
PDF is available here.
PDF is available here.
Abstract
We used cadmium sulfate hydrate (CdSO(4).8/3H(2)O), elemental S and Se. Aqueous solutions of NaOH, Na(2)SO(3) and EDTA were used as the solvents. During the syntheses, we used a direct immersion ultrasound probe by vibracell. The device operates with a constant frequency of 20 kHz, with the possibil...
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PMID: 20045661
PDF is available here.
PDF is available here.
Abstract
In this work poly(D,L-lactide-co-glycolide) (PLGA) and a poly(d,l-lactide-co-glycolide)/hydroxyapatite (PLGA/HAp) composite processed in an ultrasonic field at higher (25 degrees C) and lower (8 degrees C) temperatures were studied with respect to the molecular properties of the obtained materials....
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PMID: 20163978
PDF is available here.
PDF is available here.
Abstract
The using of sonochemically prepared components for growth of SbI(3).3S(8) single crystals from the vapor phase is presented for the first time. The good optical quality of the obtained crystals is important because this material is valuable for optoelectronics due to its non-linear optical properti...
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PMID: 20171922
PDF is available here.
PDF is available here.
Abstract
This study evaluates the favorable effects of using ultrasound during the dissolution process of ethanolic extracts of Heliconia psittacorum and Heliconia rostrata (Heliconiaceae), a family of plants reported to have antiophidic activities. The extracts were subjected to an ultrasound treatment befo...
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PMID: 20189865
PDF is available here.
PDF is available here.
Abstract
Dysprosium carbonates nanoparticles were synthesized by the reaction of dysprosium acetate and NaHCO(3) by a sonochemical method. Dysprosium oxide nanoparticles with average size about 17 nm were prepared from calcination of Dy(2)(CO(3))(3).1.7H(2)O nanoparticles. Dy(OH)(3) nanotubes were synthesize...
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PMID: 20304697
PDF is available here.
PDF is available here.
Abstract
The ultrasonic degradation of poly (styrene-co-methyl methacrylate) (SMMA), poly (styrene-co-ethyl methacrylate) (SEMA) and poly (styrene-co-butyl methacrylate) (SBMA) copolymers of different compositions was studied. The copolymers were synthesized and NMR spectroscopy was used to determine the com...
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PMID: 20215041
PDF is available here.
PDF is available here.
Abstract
We found 98.53% biodiesel yield. The optimal conditions for biodiesel production is the molar ratio oil to methanol 1:9, Catalyst conc. 3 wt.% of oil and 15 min reaction time.
(c) 2010. Published by Elsevier B.V. All rights reserved....
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PMID: 20359932
PDF is available here.
PDF is available here.
Abstract
These results indicate that Ph and 4-IPP undergo degradation predominantly at the bubble/solution interface, whereas RhB undergoes degradation at both bubble/solution interface and in the bulk solution.
(c) 2010 Elsevier B.V. All rights reserved....
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PMID: 20388590
PDF is available here.
PDF is available here.
Abstract
CuO nanoparticles provide an efficient, economic, and novel method for the synthesis of quinoxaline, benzoxazine, and benzothiazine under ultrasonic irradiation. The protocol offers advantages in terms of higher yields, short reaction times, and mild reaction conditions, with reusability of the cata...
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PMID: 20299269
PDF is available here.
PDF is available here.
Abstract
Hydrolytic enzymes released by the microorganisms in activated sludge are responsible for the organic matter degradation; however, the optimal extraction procedure of this valuable resource has not been well established until now. The present study evaluates the recovery of protease and lipase from...
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PMID: 20219407
PDF is available here.
PDF is available here.
Abstract
The photosonolysis of oxalic acid was carried out in an Ar atmosphere. The detectable products of sonolysis were CO(2), CO, H(2), and H(2)O(2). The yield of CO(2) was higher than that for the sum of sonolysis and photolysis reactions. Namely, a synergistic effect was observed during simultaneous irr...
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PMID: 20231110
PDF is available here.
PDF is available here.
Abstract
We have made an attempt to fabricate natural cellulose material using hydrodynamic as well as acoustic cavitation. The cellulose material having initial size of 63 micron was used for the experiments. 1% (w/v) slurry of cellulose sample was circulated through the hydrodynamic cavitation device or de...
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PMID: 20362487
PDF is available here.
PDF is available here.
Abstract
The cavitation field generated by an ultrasonic horn at low frequency and high power is known to self-organize into a conical bubble structure. The physical mechanism at the origin of this bubble structure is investigated using numerical simulations and acoustic pressure measurements. The thin bubbl...
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PMID: 20371200
PDF is available here.
PDF is available here.
Abstract
A facile, solvent free, ecofriendly approach for the synthesis of pyridine-2,6-diones 4a-d, pyridazinone derivatives 8a-c and thienoazines 6 and 9 is herein described employing neat reaction conditions under both microwave and ultrasound irradiations. This solventless methodology is environmentally...
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PMID: 20064736
PDF is available here.
PDF is available here.
Abstract
Recently, degradation of persistent organic pollutants (POPs) with low biodegradability in the environment and in industrial and municipal wastewaters has gained importance. In this study, a dispersed-type sonophotocatalysis (SP) process, which is a combination of sonolysis and photocatalysis with d...
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PMID: 20093063
PDF is available here.
PDF is available here.
Abstract
The adsorption behavior of naphthalene onto naturally hydrophobic talc from aqueous solution was investigated in this study. The natural talc was first pretreated by sonication to improve the surface characteristics and enhance the uptake capacity by increasing the specific surface area (SSA) of tal...
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PMID: 20163977
PDF is available here.
PDF is available here.
Abstract
A series of 2-alkylthio derivatives of hetaryl thiols were synthesized by selective S-alkylation with alkyl halides (bromides and iodides) with ultrasonic irradiation at room temperature. The reaction was found to be generally applicable to hetaryl thiol derivatives with different substituents in th...
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PMID: 20362486
PDF is available here.
PDF is available here.
Abstract
Currently several therapeutic applications of ultrasound in cancer treatment are under progress which uses cavitation phenomena to deliver their effects. There are several methods to evaluate cavitation activity such as chemical dosimetry and measurement of subharmonic signals. In this study, the ca...
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PMID: 20236851
PDF is available here.
PDF is available here.
Abstract
The effects of ultrasound on corn slurry saccharification yield and particle size distribution was studied in both batch and continuous-flow ultrasonic systems operating at a frequency of 20 kHz. Ground corn slurry (28%w/v) was prepared and sonicated in batches at various amplitudes (192-320 microm(...
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PMID: 20202884
PDF is available here.
PDF is available here.
Abstract
A sonochemical method has been developed to synthesize shear thickening fluid. This shear thickening fluid (STF) is composed of hard silicon dioxide nanoparticles and polyethylene glycol (PEG) liquid polymer. The combination of flow-able and hard components at a particular composition, results a mat...
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PMID: 20207575
PDF is available here.
PDF is available here.
Abstract
In the present work, combination of ultraviolet (UV) irradiations (using 8 W UV tube) with ultrasonic (US) irradiations (rated power 1 kW and frequency of 25 kHz) has been investigated for the degradation of phenol at pilot scale of operation. Different modes of operation viz. UV alone, US alone, UV...
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PMID: 20308000
PDF is available here.
PDF is available here.
Abstract
A novel method has been developed for the preparation of nano-sized TiO(2) with anatase phase. Nanoparticles with diameter about 6 nm were prepared at a relatively low temperature (75 degrees C) and short time. The synthesis was carried out by the hydrolysis of titanium tetra-isopropoxide (TTIP) in...
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PMID: 20382553
PDF is available here.
PDF is available here.
Abstract
Montmorillonite K-10 and KSF were found to be highly efficient, environmentally friendly and recyclable heterogeneous catalysts for the selective synthesis of a variety of 2-aryl-5,6-dihydro-4H-1,3-oxazines from arylnitriles and 3-amino-1-propanol under ultrasound irradiation. This new methodology p...
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PMID: 20219406
PDF is available here.
PDF is available here.
Abstract
1-Hexanesulphonic acid sodium salt was found to be an efficient catalyst for the green synthesis of alpha-aminophosphonates by the coupling of aldehydes/ketone, an amine and triethyl phosphite under ultrasound irradiation at ambient temperature for appropriate time to furnish the desired product in...
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PMID: 20227320
PDF is available here.
PDF is available here.
Abstract
We have studied the phenotypic, genotypic, and biochemical properties of Escherichia coli variants isolated from a periprosthetic joint infection. The strains were collected from synovial fluid, periprosthetic tissue, and fluid from the explanted and sonicated prosthesis. Isolates from synovial flui...
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PMID: 20335421
PDF is available here.
PDF is available here.
Abstract
The combination of ultrasound and heat (thermoultrasound) is an emerging food preservation technique that retains higher quantities of bioactive components compared with current thermal pasteurization practice, but has not yet been assessed for pasteurizing human milk. Artificially contaminated huma...
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PMID: 20053316
PDF is available here.
PDF is available here.
Abstract
Focused ultrasound (FUS) in combination with microbubbles has been shown capable of delivering large molecules to the brain parenchyma through opening of the blood-brain barrier (BBB). However, the mechanism behind the opening remains unknown. To investigate the pressure threshold for inertial cavit...
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PMID: 20420973
PDF is available here.
PDF is available here.
Analyst (Cambridge UK) (135)5 2010
Abstract
We compared extraction consistency of three homogenisation methods including manual ultrasonication, automatic homogenization with tissuelyser and their combination, and systematically optimised faecal metabolite extraction parameters, including the faeces-to-buffer ratio (W(f) : V(b)), extraction r...
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PMID: 20419252
PDF is available here.
PDF is available here.
Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment and General Theory (114)14 2010
Abstract
Ultrasonic irradiation in the presence of ozone is demonstrated to be effective for the rapid oxidation of oxalic acid, bioxalate, and oxalate (H(2)C(2)O(4)/HC(2)O(4)(-)/C(2)O(4)(2-)) in aqueous solution to CO(2) and H(2)O. The degradation rate of bioxalate exposed to "sonozone" (i.e., simultaneous...
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PMID: 20229985
PDF is available here.
PDF is available here.
Abstract
Fluorescent in situ hybridization (FISH) and confocal scanning laser microscopy (CSLM) are the key techniques used to investigate bacterial community structure at wastewater treatment plants. An optimum nitrifying bacterial population is necessary for nitrification, which plays a significant ecologi...
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PMID: 20513957
PDF is available here.
PDF is available here.
Methods in Molecular Biology (632)632 2010
Abstract
We uncover. Understanding the mechanisms of these aberrations to guide additional testing of the parents and genetic counseling of the patients and their families requires the expertise of individuals who are well-versed in meiotic mechanisms and chromosomal structures that may lead to these abnorma...
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PMID: 20217575
PDF is available here.
PDF is available here.
Abstract
No statistically significant difference was found among the 3 groups. None of the irrigation regimen permitted to obtain 100% of bacteria free teeth. CONCLUSION: The passive agitation of the irrigation solution did not increase its antibacterial efficiency. Longer irrigation times may be required....
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PMID: 20839477
PDF is available here.
PDF is available here.
Abstract
We show that silica nanomaterials with aspect ratios greater than 1 are highly toxic (LD(50) = 110 pg/g embryo) and cause embryo deformities, whereas silica nanomaterials with an aspect ratio of 1 are neither toxic nor teratogenic at the same concentrations. Silica nanowires also interfere with neur...
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PMID: 19447201
PDF is available here.
PDF is available here.
Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering (45)7 2010
Abstract
We have defined the efficiency of the ultrasonic control of algae at a specific frequency as: (% inactivation of the algae) / (ultrasonic intensity applied). When this is applied to the results at different frequencies the order of efficiency for algae reduction is 20 < 1146 < 864 < 580 kHz. This su...
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PMID: 20401779
PDF is available here.
PDF is available here.