Dosimetry in sonochemistry: the use of aqueous terephthalate ion as a fluorescence monitor

Mason, Timothy J.; Lorimer, J.P.; Bates, Darren; Zhao, Yi

doi:10.1016/1350-4177(94)90004-3

Cited by 348 publications

(173 citation statements)

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“…The collapse of bubble leads to increased mass transfer and microstreaming, aiding the increase of lipid extraction efficiency [47]. However, free radicals are produced when ultrasonication process is prolonged, decreasing the oil quality to be extracted [48]. The capability of bubble activity in cells disruption relies on ultrasound intensity, characteristics of the air bubble, and the relative nearness of the cells to the bubble [49].…”

Section: Fig 6: Diagrammatic Representation Of Cell Disruption By Bementioning

confidence: 99%

An Insight on Algal Cell Disruption for Biodiesel Production

Aarthy

Smita

Turkar

et al. 2018

Asian J Pharm Clin Res

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Objective: This review article deals with the effect that various cell disruption techniques have on the efficiency of lipid extraction. We have reviewed existing algal cell disruption techniques that aid the biodiesel production process.Methods: Current rise in demand for energy has led the researcher to focus on the production of sustainable fuels, among which biodiesel has received greater attention. This is due to its larger lipid content, higher growth rate, larger biomass production, and lower land use. Extraction of lipid from algae (micro and macro) for the production of biodiesel involves numerous downstream processing steps, of which cell wall disruption is a crucial step. Bead milling, high-pressure homogenization, ultra-sonication, freeze-drying, acid treatment, and enzymatic lysis are some methods of cell disruption. The cell disruption technique needs to be optimized based on the structure and biochemical composition of algae. Result:The lipid extraction efficiency varies depending on the algal species and the cell disruption technique used. Conclusion:In-depth research and development of new techniques are required to further enhance the cell disruption of the algal cell wall for the enhanced recovery of lipids. In addition, the operating costs and energy consumption should also be optimized for the cost-effective recovery.

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Section: Fig 6: Diagrammatic Representation Of Cell Disruption By Bementioning

confidence: 99%

An Insight on Algal Cell Disruption for Biodiesel Production

Aarthy

Smita

Turkar

et al. 2018

Asian J Pharm Clin Res

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“…For example in bulk solution, sonolysis in water leads to the hydroxyl radical bought about by dissociation of water inside the cavitation bubble. Simple tests for such radicals include the Weissler test [43,44] solution and the Fricke [45], terphthalate [46,47] and nitrophenol dosimeters [48,49]. Evidence of the degradation products induced by ultrasound was investigated in pioneering work by Riesz et al [50 ± 53] who utilized EPR spin trapping of the non-volatile nitrone.…”

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confidence: 99%

Ultrasonically Enhanced Voltammetric Analysis and Applications: An Overview

Banks

Compton

2003

Electroanalysis

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“…Time (iir) figure 2.4. Use of ultrasound and the combination of FTC and ultrasound on the synthesis of T0S3TACN (Mason et al^ 1994). …”

Section: Medicinal Usesmentioning

confidence: 99%

“…In addition, it is inq>ortant to use the same type of reaction vessel for each reaction because the shape of the bottom of the reaction vessel significant^ influences the wave pattem, even 79 placed in the same position in the bath (Mason et al, 1994;Pugin, 1987;Weber and Chon, 1967).…”

Section: Intrasonic System Typesmentioning

confidence: 99%

“…However, Pettier et al (1992b) also reasoned that since bubble lifetimes were shorter at higher frequencies (3 x 10'^ s at S14 kHz as conqiared to 3 x 10'^ s at 20 kHz), that the OH radicals have an opportunity to escape the cavitation bubble before undergoing any reaction. A sinnlar hypothesis was been proposed by Mason et al (1994) A^o q)eculated that the escape of the OH radicals to the bulk solution increases their availability for reaction.…”

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Sonochemical reactions: mass transfer and kinetic studies of a solid-liquid system

Hagenson

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This manuscript has been reproduced from the microfilm master. UMI films the text directly from the ori^nal or copy submitted. Thus, some thesis and dissertation copies are in typewriter &ce, while others may be from aity type of computer printer.The quality of this reproductioii is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book.Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. Hgure3.14 Effect of ambient teniperature on reaction with ultrasound. 154 Afier an extensive analysis of the experimental data obtained ffom the system, it is concluded that the reaction occurs on the solid phase, and that the liquid phase reaction is negligible.Usmg several investigative techniques, the e^qiected effects of ultrasound were observed, such as the degradative effects on particle size leading to increased sur&ce area.More inq)ortantly, some novel findings of the effects of ultrasound on mass transfer parameters are reported. Results cleariy show that ultrasound enhances the intrinsic mass transfer coef&cient as well as the effective diffiisivity of an organic reactant through the ionic lattice of the product layer. In addition, ultrasound also induces siqiersaturation of Dissertation OrganizationOiapter 2 is a con:q)rehensive review of ^^t is available in the literature potaining to the use of ultrasound in organic synthesis. The latter sections of the review contain information concerning scale-iq> and design of sonochemical reactors.Chapter 3 contains the initial investigations and e>q)erimental data obtained for a model solid-liqmd reaction, the ^thesis of dibenzyl sulfide from ben;^l chloride and sodium sulfide, xising a variety of rate enhancement techniques, mchiding microphases, phase transfer catatysis 2 and ultrasound. The objective of the paper was to investigate the individual and combined effects of these rate enhancement techniques. After this work was con^leted, the research path bifiircated from, the study of phase transfer catafysis and microphases and focused solely on the use of ultrasound.Chapter 4 is a detailed investigation, including a co...

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Dosimetry in sonochemistry: the use of aqueous terephthalate ion as a fluorescence monitor

Cited by 348 publications

References 8 publications

An Insight on Algal Cell Disruption for Biodiesel Production

An Insight on Algal Cell Disruption for Biodiesel Production

Ultrasonically Enhanced Voltammetric Analysis and Applications: An Overview

Sonochemical reactions: mass transfer and kinetic studies of a solid-liquid system

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