A review of engineering aspects of intensification of chemical synthesis using ultrasound

Sancheti, Sonam V.; Gogate, Parag R.

doi:10.1016/j.ultsonch.2016.08.009

Cited by 192 publications

(115 citation statements)

References 73 publications

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“…The US-induced secondary metabolism observed in plant cell cultures could be regulated by low-level ROS, which have been shown to be produced in sonicated cell-free solutions [92,93] and in cells upon exposure to moderate U.S. [94]. This effect has become a background for the sonodynamic therapy of tumours [95,96].…”

Section: Redox Regulation Of Secondary Metabolite Synthesis In Plamentioning

confidence: 99%

Meristem Plant Cells as a Sustainable Source of Redox Actives for Skin Rejuvenation

Korkina¹,

Mayer²,

Luca³

2017

Biomolecules

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Recently, aggressive advertisement claimed a “magic role” for plant stem cells in human skin rejuvenation. This review aims to shed light on the scientific background suggesting feasibility of using plant cells as a basis of anti-age cosmetics. When meristem cell cultures obtained from medicinal plants are exposed to appropriate elicitors/stressors (ultraviolet, ultrasound ultraviolet (UV), ultrasonic waves, microbial/insect metabolites, heavy metals, organic toxins, nutrient deprivation, etc.), a protective/adaptive response initiates the biosynthesis of secondary metabolites. Highly bioavailable and biocompatible to human cells, low-molecular weight plant secondary metabolites share structural/functional similarities with human non-protein regulatory hormones, neurotransmitters, pigments, polyamines, amino-/fatty acids. Their redox-regulated biosynthesis triggers in turn plant cell antioxidant and detoxification molecular mechanisms resembling human cell pathways. Easily isolated in relatively large quantities from contaminant-free cell cultures, plant metabolites target skin ageing mechanisms, above all redox imbalance. Perfect modulators of cutaneous oxidative state via direct/indirect antioxidant action, free radical scavenging, UV protection, and transition-metal chelation, they are ideal candidates to restore photochemical/redox/immune/metabolic barriers, gradually deteriorating in the ageing skin. The industrial production of plant meristem cell metabolites is toxicologically and ecologically sustainable for fully “biological” anti-age cosmetics.

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Section: Redox Regulation Of Secondary Metabolite Synthesis In Plamentioning

confidence: 99%

Meristem Plant Cells as a Sustainable Source of Redox Actives for Skin Rejuvenation

Korkina¹,

Mayer²,

Luca³

2017

Biomolecules

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“…6 walls or at the bottom of a vessel. US energy is indirectly dissipated from the transducer to the sample through a coupling fluid, most often water (Sancheti & Gogate, 2017).…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Effects of ultrasound on the fermentation profile of fermented milk products incorporated with lactic acid bacteria

Abesinghe

Islam

Vidanarachchi

et al. 2019

International Dairy Journal

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Ultrasonic processing of fermented milk products has created much interest in current research on dairy products. This has been employed in cultured milk products to enhance the emulsification of milk fat and to intensify the fermentation process. Benefits including remarkable product stability, reduced processing time and enhanced quality are being recorded. Ultrasound (US) altered the colour and flavour profile of milk; however, the effect of USinduced fermentation on the synthesis of flavour compounds in milk has not been reported in the literature. This review paper presents a comprehensive scenario on the impact of power US on García, 2011). Depending on the conditions used such as amplitude, temperature, pressure, and the composition of the medium, several mechanisms can be activated including increase of the temperature, surface instability, generation of agitation and friction, increase of mass transfer, generation of free radicals and disruption of cell materials (Ashokkumar, 2011; Martini, 2013b; Salazar, Chávez, Turó, & García-Hernández, 2009). 3. Application of power ultrasound in lactic fermentation of milk Application of both low power ultrasound (LPU) and power US in fermentation has been reported in the literature. LPU has power intensities below 1 Wcm-2 and is commonly used for non-destructive analysis in the food industry to characterise food components, often on quality assurance lines and to monitor fermentation processes (Novoa-Díaz et al., 2014) and is not a focus for this review paper. On the other hand, PU (with power intensities above 10 Wcm-2) alone (sonication) or in combination with external pressure (manosonication), heat

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“…The oscillating pressure field created by alternate compression and rarefaction cycles of ultrasound waves are responsible for inducing the different stages of cavitation, such as generation of cavities, subsequent growth to a maximum size and finally violent collapse. The cavitational effects are classified into the chemical effects, such as generation of free radicals and local hot spots, and physical effects, such as intense turbulence coupled with liquid circulation that helps in reducing mass transfer resistance [25].…”

Section: Basic Aspects Of Cavitationmentioning

confidence: 99%

Application of Hydrodynamic Cavitation Reactors for Treatment of Wastewater Containing Organic Pollutants: Intensification Using Hybrid Approaches

Thanekar

Gogate

2018

Fluids

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The concentration of hazardous pollutants in the wastewater streams has to keep below a certain level in order to comply with the stringent environmental laws. The conventional technologies for wastewater treatment have drawbacks in terms of limited applicability and efficiency. Utilization of hydrodynamic cavitation (HC) reactors for the degradation of pollutants at large scale has shown considerable promise over last few years, due to higher energy efficiencies and low cost operation based on lower consumption of chemicals for the treatment. The present work overviews the degradation of different pollutants, such as pharmaceuticals, pesticide, phenolic derivatives and dyes, as well as the treatment of real industrial effluents using hybrid methods based on HC viz. HC/H2O2, HC/Ozone, HC/Fenton, HC/Ultraviolet irradiations (UV), and HC coupled with biological oxidation. Furthermore, based on the literature reports, recommendations for the selection of optimum operating parameters, such as inlet pressure, solution temperature, initial pH and initial pollutant concentration have been discussed in order to maximize the process intensification benefits. Moreover, hybrid methods based on HC has been demonstrated to show good synergism as compared to individual treatment approach. Overall, high energy efficient wastewater treatment can be achieved using a combined treatment approach based on HC under optimized conditions.

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A review of engineering aspects of intensification of chemical synthesis using ultrasound

Cited by 192 publications

References 73 publications

Meristem Plant Cells as a Sustainable Source of Redox Actives for Skin Rejuvenation

Meristem Plant Cells as a Sustainable Source of Redox Actives for Skin Rejuvenation

Effects of ultrasound on the fermentation profile of fermented milk products incorporated with lactic acid bacteria

Application of Hydrodynamic Cavitation Reactors for Treatment of Wastewater Containing Organic Pollutants: Intensification Using Hybrid Approaches

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