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Li N, Freitas DS, Santos J, Venâncio A, Noro J, Su J, Wang H, Silva C, Cavaco-Paulo A. Laccase-Catalyzed Synthesis of Added-Value Polymers from Cork and Grape Extracts. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:18877-18889. [PMID: 37991200 DOI: 10.1021/acs.jafc.3c04798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
The development of products from natural plant sources, including agriculture and food wastes, contributes significantly to the circular economy and global sustainability. Cork and grape wastes were employed as the primary sources in this study to obtain compounds of interest under mild extraction conditions. Laccase was applied to oxidize the cork and grape extracts, with the aim of producing value-added molecules with improved properties. Ultraviolet-visible (UV-vis) spectroscopy was assessed to monitor the oxidation process, and characterization of the end products was performed by matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) spectroscopy. The antioxidant and antiaging properties were evaluated by means of ABTS, DPPH, FRAP, and SPF testing. Overall, as compared to their monomeric counterparts, the polymeric compounds displayed remarkable antioxidant and antiaging characteristics after laccase oxidation, showing tremendous potential for applications in the food, pharmaceutical, cosmetic, and textile industries.
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Affiliation(s)
- Nannan Li
- Jiangsu Engineering Technology Research Center for Functional Textiles, Jiangnan University, No. 1800 Lihu Avenue, 214122 Wuxi, P. R. China
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, No. 1800 Lihu Avenue, 214122 Wuxi, P. R. China
| | - David S Freitas
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- LABBELS─Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Joana Santos
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- LABBELS─Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Armando Venâncio
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- LABBELS─Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Jennifer Noro
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- LABBELS─Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Jing Su
- Jiangsu Engineering Technology Research Center for Functional Textiles, Jiangnan University, No. 1800 Lihu Avenue, 214122 Wuxi, P. R. China
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, No. 1800 Lihu Avenue, 214122 Wuxi, P. R. China
| | - Hongbo Wang
- Jiangsu Engineering Technology Research Center for Functional Textiles, Jiangnan University, No. 1800 Lihu Avenue, 214122 Wuxi, P. R. China
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, No. 1800 Lihu Avenue, 214122 Wuxi, P. R. China
| | - Carla Silva
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- LABBELS─Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Artur Cavaco-Paulo
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- LABBELS─Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
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Udepurkar AP, Clasen C, Kuhn S. Emulsification mechanism in an ultrasonic microreactor: Influence of surface roughness and ultrasound frequency. ULTRASONICS SONOCHEMISTRY 2023; 94:106323. [PMID: 36774674 PMCID: PMC9945801 DOI: 10.1016/j.ultsonch.2023.106323] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/26/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
An ultrasonic microreactor with rough microchannels is presented in this study for oil-in-water (O/W) emulsion generation. Previous accounts have shown that surface pits or imperfections localize and enhance cavitation activity. In this study cavitation bubbles are localized on the rough microchannels of a borosilicate glass microreactor. The cavitation bubbles in the microchannel are primarily responsible for emulsification in the ultrasonic microreactor. We investigate the emulsification mechanism in the rough microchannels employing high-speed imaging to reveal the different emulsification modes influenced by the size and oscillation intensity of the cavitation bubbles. The effect of emulsification modes on the O/W emulsion droplet size distribution for different surface roughness and frequency is demonstrated. The positive effect of the frequency on minimizing the droplet size utilizing a reactor with large pits is presented. We also demonstrate microreactor systems for a successful generation of miniemulsions with high dispersed phase volume fractions up to 20%. The observed emulsification mechanism in the rough microchannel offers new insights into the utility and scale-up of ultrasonic microreactors for emulsification.
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Affiliation(s)
- Aniket Pradip Udepurkar
- Department of Chemical Engineering, Process Engineering for Sustainable Systems (ProcESS), KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Christian Clasen
- Department of Chemical Engineering, Soft Matter, Rheology and Technology (SMaRT), KU Leuven, Celestijnenlaan 200J, 3001 Leuven, Belgium
| | - Simon Kuhn
- Department of Chemical Engineering, Process Engineering for Sustainable Systems (ProcESS), KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
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Zou S, Zhang H, Wang J. Ultrasound-assisted Pickering Interfacial Catalysis for Transesterification: Optimization of Biodiesel Yield by Response Surface Methodology. J Oleo Sci 2023; 72:233-243. [PMID: 36631108 DOI: 10.5650/jos.ess22340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Recently, Pickering interfacial catalyst (PIC) was widely applied for liquid-liquid reactions, in view of not only intensifying the mass transfer through significant reducing both the drop sizes and the diffusion distance, but also supplying a flexible platform for the immobilization of valuable active sites. However, the restriction of the mobility of catalyst somehow decreases the activity of a catalyst. To obtain a promise reaction efficiency, we firstly report a synergistic method to enhance the biphasic reaction by Pickering emulsion and ultrasound concepts, targeted at efficient production of biodiesel. Response surface methodology based on Box-Behnken design was applied to optimize the reaction conditions, such as composition of catalyst, reaction temperature, ultrasound power, methanol to oil molar ratio and catalyst amount. An over 98% yield of biodiesel could be achieved within 2.5 hours by ultrasound assisted Pickering interfacial catalysis, which is over two times higher than that of ultrasound assisted homogeneous transesterification system. Besides, the ultrasound assisted Pickering emulsion shortened the reaction time by 3.6 fold when compared to mechanical stirring assisted Pickering emulsion system.
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Affiliation(s)
- Siyuan Zou
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology
| | - Hao Zhang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology
| | - Jianli Wang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology
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Yaghoobi M, Sanikhani M, Samimi Z, Kheiry A. Selection of a suitable solvent for bioactive compounds extraction of myrtle (
Myrtus communis
L.) leaves using ultrasonic waves. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maliheh Yaghoobi
- Department of Chemical Engineering Faculty of Engineering University of Zanjan Zanjan Iran
| | - Mohsen Sanikhani
- Department of Horticulture Faculty of Agriculture University of Zanjan Zanjan Iran
| | - Zeinab Samimi
- Department of Horticulture Faculty of Agriculture University of Zanjan Zanjan Iran
| | - Azizollah Kheiry
- Department of Horticulture Faculty of Agriculture University of Zanjan Zanjan Iran
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Wu WH, Eskin DG, Priyadarshi A, Subroto T, Tzanakis I, Zhai W. New insights into the mechanisms of ultrasonic emulsification in the oil-water system and the role of gas bubbles. ULTRASONICS SONOCHEMISTRY 2021; 73:105501. [PMID: 33676157 PMCID: PMC7933810 DOI: 10.1016/j.ultsonch.2021.105501] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/31/2021] [Accepted: 02/17/2021] [Indexed: 05/06/2023]
Abstract
Ultrasonic emulsification (USE) assisted by cavitation is an effective method to produce emulsion droplets. However, the role of gas bubbles in the USE process still remains unclear. Hence, in the present paper, high-speed camera observations of bubble evolution and emulsion droplets formation in oil and water were used to capture in real-time the emulsification process, while experiments with different gas concentrations were carried out to investigate the effect of gas bubbles on droplet size. The results show that at the interface of oil and water, gas bubbles with a radius larger than the resonance radius collapse and sink into the water phase, inducing (oil-water) blended liquid jets across bubbles to generate oil-in-water-in-oil (O/W/O) and water-in-oil (W/O) droplets in the oil phase and oil-in-water (O/W) droplets in the water phase, respectively. Gas bubbles with a radius smaller than the resonance radius at the interface always move towards the oil phase, accompanied with the generation of water droplets in the oil phase. In the oil phase, gas bubbles, which can attract bubbles nearby the interface, migrate to the interface of oil and water due to acoustic streaming, and generate numerous droplets. As for the gas bubbles in the water phase, those can break neighboring droplets into numerous finer ones during bubble oscillation. With the increase in gas content, more bubbles undergo chaotic oscillation, leading to smaller and more stable emulsion droplets, which explains the beneficial role of gas bubbles in USE. Violently oscillating microbubbles are, therefore, found to be the governing cavitation regime for emulsification process. These results provide new insights to the mechanisms of gas bubbles in oil-water emulsions, which may be useful towards the optimization of USE process in industry.
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Affiliation(s)
- W H Wu
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, PR China
| | - D G Eskin
- Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University London, Uxbridge UB8 3PH, United Kingdom; Tomsk State University, Tomsk 634050, Russian Federation.
| | - A Priyadarshi
- Faculty of Technology, Design and Environment, Oxford Brookes University, Oxford OX33 1HX, United Kingdom
| | - T Subroto
- Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University London, Uxbridge UB8 3PH, United Kingdom
| | - I Tzanakis
- Faculty of Technology, Design and Environment, Oxford Brookes University, Oxford OX33 1HX, United Kingdom; Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
| | - W Zhai
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, PR China.
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