1
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Liu P, Wu Z, Fang Z, Cravotto G. Sonolytic degradation kinetics and mechanisms of antibiotics in water and cow milk. ULTRASONICS SONOCHEMISTRY 2023; 99:106518. [PMID: 37572426 PMCID: PMC10433014 DOI: 10.1016/j.ultsonch.2023.106518] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 08/14/2023]
Abstract
Antibiotics (ABX) residues frequently occurred in water and cow milk. This work aims to understand the kinetics and mechanisms of sonolytic degradation of four ABX, i.e. ceftiofur hydrochloride (CEF), sulfamonomethoxine sodium (SMM), marbofloxacin (MAR), and oxytetracycline (OTC) in water and milk. In both water and milk, the sonolytic degradation of ABX follows pseudo-first order (PFO) kinetics well (R2: 0.951-0.999), with significantly faster ABX degradation in water (PFO kinetics constants (k1): 1.5 × 10-3-1.2 × 10-1 min-1) than in milk (k1: 3.5 × 10-4-5.6 × 10-2 min-1). The k1 values for SMM degradation in water increased by 118% with ultrasonic frequency (40-120 kHz), 174% with ultrasonic frequency (80-500 kHz), 649% with ultrasonic power (73-259 W), 22% with bulk temperature (12-40℃), and by 68% with reaction volume (50-250 mL), respectively, in other things being equal. The relevant k1 values in milk increased by 326%, 231%, 122%, 10% as well as 82% with the above same effective factors, respectively. The oxidation by free radicals generated in situ dominates ABX degradation, and the hydrophobic CEF (54.0-971.7 nM min-1) and SMM (39.2-798.4 nM min-1) underwent faster degradation than the hydrophilic MAR (33.9-751.9 nM min-1) and OTC (33.8-545.3 nM min-1) in both water and milk. Adding an extra 0.5 mM H2O2 accelerated SMM degradation by 19% in water and 33% in milk. After 130-150 min sonication of 100 mL of 2.0 mg L-1 (6.62 μM) SMM in various milk with 500 kHz and 259 W, the residue concentrations (52.9-96.3 μg L-1) can meet the relevant maximum residue limit (100 μg L-1).
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Affiliation(s)
- Pengyun Liu
- Department of Drug Science and Technology, University of Turin, via P. Giuria 9, 10125 Turin, Italy
| | - Zhilin Wu
- College of Chemistry and Chemical Engineering of Shantou University, and Chemistry and Chemical Engineering Guangdong Laboratory, 515063 Shantou, China.
| | - Zhen Fang
- Biomass Group, College of Engineering, Nanjing Agricultural University, 40 Dianjiangtai Road, Nanjing 210031, China
| | - Giancarlo Cravotto
- Department of Drug Science and Technology, University of Turin, via P. Giuria 9, 10125 Turin, Italy.
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2
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Kian-Pour N, Yildirim-Yalcin M, Kurt A, Ozmen D, Toker OS. A review on latest innovations in physical modifications of galactomannans. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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3
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Bagal MV, Saini RR, Shaikh ARI, Patil S, Mohod AV, Pinjari DV. Effect of additives on degradation of poly vinyl alcohol (PVA) using ultrasound and microwave irradiation. INT POLYM PROC 2022. [DOI: 10.1515/ipp-2022-4232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The degradation of polyvinyl alcohol (PVA) has been investigated using ultrasonic (US) as well as microwave (MW) irradiation techniques with the approach of process intensification based on different additives, such as Titanium Dioxide (TiO2), Sodium Lauryl Sulphate (SLS), Zinc Oxide (ZnO) and air. The effects of sonication time, initial polymer concentration, and temperature on the extent of reduction in viscosity have been thoroughly investigated using US as well as MW irradiation approaches. Basically, the degradation process has been optimized by utilizing two different ultrasonic reactors in a combined approach of ultrasonic horn and bath. The maximum extent of degradation of PVA was found to be 69.33% using MW irradiation with a required energy of 0.321 g/JL, and 62.47% using US horn with a required energy of 0.054 g/JL when operated at 0.1 g/L of TiO2 catalyst. The combination of US horn and US bath results in same degradation as 0.1 g/L of TiO2 catalyst with US horn. It has also been observed that the maximum degradation of PVA was obtained with a minimum treatment time of 3 min using MW irradiation, whereas the US horn required 40 min. Moreover, a lower extent of PVA degradation was obtained when additives were used, such as surfactants (SLS) and air. As a result, it can be inferred that the MW-assisted approach in the presence of process-intensifying additives/catalysts is the best approach for the degradation of PVA with a minimum energy consumption.
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Affiliation(s)
- Manisha V. Bagal
- Department of Chemical Engineering, Bharati Vidyapeeth College of Engineering , Navi Mumbai 400613 , India
| | - Rahul R. Saini
- Department of Chemical Engineering, AISSMS College of Engineering , Kennedy Road, Near RTO , Pune 411001 , India
| | - Abdul Rahim I. Shaikh
- Department of Chemical Engineering, AISSMS College of Engineering , Kennedy Road, Near RTO , Pune 411001 , India
| | - Saurabh Patil
- Department of Chemical Engineering, AISSMS College of Engineering , Kennedy Road, Near RTO , Pune 411001 , India
| | - Ashish V. Mohod
- Department of Chemical Engineering, AISSMS College of Engineering , Kennedy Road, Near RTO , Pune 411001 , India
- Chemical Engineering Department , Universidade de São Paulo , São Paulo , Brazil
| | - Dipak V. Pinjari
- Chemical Engineering Department , Institute of Chemical Technology , Matunga , Mumbai 400019 , India
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4
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Robo MT, Collias D, Zimmerman PM. Interplay Between Applied Force and Radical Attack in the Mechanochemical Chain Scission of Poly(acrylic acid). J Phys Chem A 2022; 126:521-528. [PMID: 35078315 DOI: 10.1021/acs.jpca.1c08919] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sonication and radical attack are both known to contribute to breaking down polymers. Quantum chemical models show how the two can operate together, where radical attack is shown to reduce the effective tensile strength of the material. Using poly(acrylic acid) (PAA) as a model, hydrogen atom abstraction in PAA was found to improve the thermodynamics and kinetics of bond scission. The force needed for bond rupture was estimated to decrease from 4.7 to 2.5 nN. This occurs because hydrogen atom abstraction drastically alters the potential energy surface of the scissile bond. Bond activation was also found to decrease the magnitude of the changes in bond scission geometries and energetics in response to the applied force. While radical abstraction is overall beneficial for mechanical bond scission, the polymer also becomes less responsive to force than the unactivated polymer. This finding places upper limits on the efficacy of the synergy between radical attack and applied force. In addition, the importance of reaction pathway optimization is also shown, where comparisons to the COGEF method show the latter to be qualitatively incapable of describing chain scission after radical activation.
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Affiliation(s)
- Michael T Robo
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48104, United States
| | - Dimitris Collias
- Corporate R&D, The Procter and Gamble Co., West Chester, Ohio 45069, United States
| | - Paul M Zimmerman
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48104, United States
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5
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Smith KM, Hsiao LC. Migration and Morphology of Colloidal Gel Clusters in Cylindrical Channel Flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10308-10318. [PMID: 34403581 DOI: 10.1021/acs.langmuir.1c01287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We report the cluster-level structural parameters of colloidal thermogelling nanoemulsions in channel flow as a function of attractive interactions and local shear stress. The spatiotemporal evolution of the gel microstructure is obtained by directly visualizing the dispersed phase near the edge of a cylindrical channel. We observe the flow of the nanoemulsion gels in a range of radial positions (r) and shear stresses between 70 and 220 Pa, finding that the r-dependent cluster sizes are due to a balance between shear forces that yield bonds and attractive interactions that rebuild the inter-colloid bonds. In addition, the largest clusters appear to be affected by confinement and accumulate toward the central axis of the channel, resulting in a volume fraction gradient. Cluster size and volume fraction variabilities are most prominent when the attractive interactions are the strongest. Specifically, a distinct transition from sparse, fluidized clusters near the walls to concentrated, large clusters toward the center is observed. These two structural states coincide with a velocity-based transition from higher shear rates near the walls to lower shear rates toward the center of the channel. We find a compounding effect where larger gel clusters, formed under strong attractions and low shear stresses, are susceptible to shear-induced migration that intensifies r-dependent heterogeneity and deviations in the flow behavior from predictive models.
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Affiliation(s)
- Kristine M Smith
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Lilian C Hsiao
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
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6
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Kratz H, Mohtashamdolatshahi A, Eberbeck D, Kosch O, Wiekhorst F, Taupitz M, Hamm B, Stolzenburg N, Schnorr J. Tailored Magnetic Multicore Nanoparticles for Use as Blood Pool MPI Tracers. NANOMATERIALS 2021; 11:nano11061532. [PMID: 34200588 PMCID: PMC8228684 DOI: 10.3390/nano11061532] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 01/10/2023]
Abstract
For the preclinical development of magnetic particle imaging (MPI) in general, and the exploration of possible new clinical applications of MPI in particular, tailored MPI tracers with surface properties optimized for the intended use are needed. Here we present the synthesis of magnetic multicore particles (MCPs) modified with polyethylene glycol (PEG) for use as blood pool MPI tracers. To achieve the stealth effect the carboxylic groups of the parent MCP were activated and coupled with pegylated amines (mPEG-amines) with different PEG-chain lengths from 2 to 20 kDa. The resulting MCP-PEG variants with PEG-chain lengths of 10 kDa (MCP-PEG10K after one pegylation step and MCP-PEG10K2 after a second pegylation step) formed stable dispersions and showed strong evidence of a successful reaction of MCP and MCP-PEG10K with mPEG-amine with 10 kDa, while maintaining their magnetic properties. In rats, the mean blood half-lives, surprisingly, were 2 and 62 min, respectively, and therefore, for MCP-PEG10K2, dramatically extended compared to the parent MCP, presumably due to the higher PEG density on the particle surface, which may lead to a lower phagocytosis rate. Because of their significantly extended blood half-life, MCP-PEG10K2 are very promising as blood pool tracers for future in vivo cardiovascular MPI.
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Affiliation(s)
- Harald Kratz
- Department of Radiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-10117 Berlin, Germany; (A.M.); (M.T.); (B.H.); (N.S.); (J.S.)
- Correspondence: ; Tel.: +49-30-450-527180
| | - Azadeh Mohtashamdolatshahi
- Department of Radiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-10117 Berlin, Germany; (A.M.); (M.T.); (B.H.); (N.S.); (J.S.)
| | - Dietmar Eberbeck
- Physikalisch-Technische Bundesanstalt, D-10587 Berlin, Germany; (D.E.); (O.K.); (F.W.)
| | - Olaf Kosch
- Physikalisch-Technische Bundesanstalt, D-10587 Berlin, Germany; (D.E.); (O.K.); (F.W.)
| | - Frank Wiekhorst
- Physikalisch-Technische Bundesanstalt, D-10587 Berlin, Germany; (D.E.); (O.K.); (F.W.)
| | - Matthias Taupitz
- Department of Radiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-10117 Berlin, Germany; (A.M.); (M.T.); (B.H.); (N.S.); (J.S.)
| | - Bernd Hamm
- Department of Radiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-10117 Berlin, Germany; (A.M.); (M.T.); (B.H.); (N.S.); (J.S.)
| | - Nicola Stolzenburg
- Department of Radiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-10117 Berlin, Germany; (A.M.); (M.T.); (B.H.); (N.S.); (J.S.)
| | - Jörg Schnorr
- Department of Radiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-10117 Berlin, Germany; (A.M.); (M.T.); (B.H.); (N.S.); (J.S.)
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7
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Jimenez‐Francisco M, Carrillo JG, Garcia‐Cerda LA. Mechanochemical tuning of molecular weight distribution of styrene homopolymers as postpolymerization modification in solvent‐free solid‐state. J Appl Polym Sci 2021. [DOI: 10.1002/app.49628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | - Luis Alfonso Garcia‐Cerda
- Departamento de Materiales Avanzados Centro de Investigación en Química Aplicada Saltillo Coahuila Mexico
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8
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Luo X, Gong H, He Z, Zhang P, He L. Recent advances in applications of power ultrasound for petroleum industry. ULTRASONICS SONOCHEMISTRY 2021; 70:105337. [PMID: 32916430 PMCID: PMC7786608 DOI: 10.1016/j.ultsonch.2020.105337] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/29/2020] [Accepted: 08/30/2020] [Indexed: 05/28/2023]
Abstract
Power ultrasound, as an emerging green technology has received increasing attention of the petroleum industry. The physical and chemical effects of the periodic oscillation and implosion of acoustic cavitation bubbles can be employed to perform a variety of functions. Herein, the mechanisms and effects of acoustic cavitation are presented. In addition, the applications of power ultrasound in the petroleum industry are discussed in detail, including enhanced oil recovery, oil sand extraction, demulsification, viscosity reduction, oily wastewater treatment and oily sludge treatment. From the perspective of industrial background, key issue and resolution mechanism, current applications and future development of power ultrasound are discussed. In addition, the effects of acoustic parameters on treatment efficiency, such as frequency, acoustic intensity and treatment time are analyzed. Finally, the challenges and outlook for industrial application of power ultrasound are discussed.
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Affiliation(s)
- Xiaoming Luo
- Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, China University of Petroleum (East China), Qingdao 266580, China.
| | - Haiyang Gong
- Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, China University of Petroleum (East China), Qingdao 266580, China
| | - Ziling He
- Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, China University of Petroleum (East China), Qingdao 266580, China
| | - Peng Zhang
- Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, China University of Petroleum (East China), Qingdao 266580, China
| | - Limin He
- Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, China University of Petroleum (East China), Qingdao 266580, China; Surface Engineering Pilot Test Center, China National Petroleum Corporation, Daqing 163453, China
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9
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Ma X, Hou F, Zhao H, Wang D, Chen W, Miao S, Liu D. Conjugation of soy protein isolate (SPI) with pectin by ultrasound treatment. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.106056] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Yan J, Xu J, Ai S, Zhang K, Yang F, Huang Y. Degradation of chitosan with self-resonating cavitation. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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11
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Yan J, Ai S, Yang F, Zhang K, Huang Y. Study on mechanism of chitosan degradation with hydrodynamic cavitation. ULTRASONICS SONOCHEMISTRY 2020; 64:105046. [PMID: 32145520 DOI: 10.1016/j.ultsonch.2020.105046] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 02/24/2020] [Accepted: 02/24/2020] [Indexed: 06/10/2023]
Abstract
Hydrodynamic cavitation is an effective method for chitosan degradation, of which the mechanism directly determines the molecular weight distribution of degradation products. In this study, based on the Monte Carlo simulation and experimental results, the mechanism of chitosan degradation with hydrodynamic cavitation and molecular weight distribution of products were analyzed. The results showed that the algorithm established in the simulation could effectively analyze degradation mechanism and the factors that influenced degradation mechanism and molecular weight distribution of products. The degradation with hydrodynamic cavitation was caused by chemical and mechanical effects, of which the former dominated the degradation process. The outlet and inlet angles and throat length of the cavitator had major and minor influences on the degradation pattern, respectively. The chemical effect led to random cuts resulting in wide distribution of the products, while the mechanical effect led to central cuts resulting in narrow distribution of the products. With more central cuts, the slide-shaped molecular weight distribution curve of degradation products was gradually transferred into a bell-shaped curve. These results provide instructions for researches on the molecular weight distribution of chitosan products degraded with hydrodynamic cavitation.
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Affiliation(s)
- Jingchen Yan
- Guangxi Key Laboratory of Green Processing of Sugar Resources (Guangxi University of Science and Technology), Liuzhou 545006, Guangxi, PR China; School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, PR China
| | - Shuo Ai
- Guangxi Key Laboratory of Green Processing of Sugar Resources (Guangxi University of Science and Technology), Liuzhou 545006, Guangxi, PR China; School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, PR China
| | - Feng Yang
- Guangxi Key Laboratory of Green Processing of Sugar Resources (Guangxi University of Science and Technology), Liuzhou 545006, Guangxi, PR China; School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, PR China
| | - Kunming Zhang
- Guangxi Key Laboratory of Green Processing of Sugar Resources (Guangxi University of Science and Technology), Liuzhou 545006, Guangxi, PR China; School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, PR China
| | - Yongchun Huang
- Guangxi Key Laboratory of Green Processing of Sugar Resources (Guangxi University of Science and Technology), Liuzhou 545006, Guangxi, PR China; School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, PR China.
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12
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Niu B, Shao P, Sun P. Ultrasound-assisted emulsion electrosprayed particles for the stabilization of β-carotene and its nutritional supplement potential. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105634] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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13
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Ito S, Sakai K, Gamaleev V, Ito M, Hori M, Kato M, Shimizu M. Oxygen radical based on non-thermal atmospheric pressure plasma alleviates lignin-derived phenolic toxicity in yeast. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:18. [PMID: 32010221 PMCID: PMC6988259 DOI: 10.1186/s13068-020-1655-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 01/12/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Vanillin is the main byproduct of alkaline-pretreated lignocellulosic biomass during the process of fermentable-sugar production and a potent inhibitor of ethanol production by yeast. Yeast cells are usually exposed to vanillin during the industrial production of bioethanol from lignocellulosic biomass. Therefore, vanillin toxicity represents a major barrier to reducing the cost of bioethanol production. RESULTS In this study, we analysed the effects of oxygen-radical treatment on vanillin molecules. Our results showed that vanillin was converted to vanillic acid, protocatechuic aldehyde, protocatechuic acid, methoxyhydroquinone, 3,4-dihydroxy-5-methoxybenzaldehyde, trihydroxy-5-methoxybenzene, and their respective ring-cleaved products, which displayed decreased toxicity relative to vanillin and resulted in reduced vanillin-specific toxicity to yeast during ethanol fermentation. Additionally, after a 16-h incubation, the ethanol concentration in oxygen-radical-treated vanillin solution was 7.0-fold greater than that from non-treated solution, with similar results observed using alkaline-pretreated rice straw slurry with oxygen-radical treatment. CONCLUSIONS This study analysed the effects of oxygen-radical treatment on vanillin molecules in the alkaline-pretreated rice straw slurry, thereby finding that this treatment converted vanillin to its derivatives, resulting in reduced vanillin toxicity to yeast during ethanol fermentation. These findings suggest that a combination of chemical and oxygen-radical treatment improved ethanol production using yeast cells, and that oxygen-radical treatment of plant biomass offers great promise for further improvements in bioethanol-production processes.
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Affiliation(s)
- Shou Ito
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Kiyota Sakai
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Vladislav Gamaleev
- Faculty of Science and Technology, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Masafumi Ito
- Faculty of Science and Technology, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Masaru Hori
- Center for Low-temperature Plasma Sciences, Nagoya University, Nagoya, Aichi 464-8603 Japan
| | - Masashi Kato
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Motoyuki Shimizu
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
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14
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Hammi KM, Hammami M, Rihouey C, Le Cerf D, Ksouri R, Majdoub H. Ultrasonication of Polysaccharides from Tunisian Zizyphus lotus Fruit: Emulsifying Capacities, Rheological Properties and Antioxidant activities. CHEMISTRY AFRICA 2020. [DOI: 10.1007/s42250-020-00117-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Gao W, Zhang P, Lin P, Zeng X, Brennan MA. Comparison of litchi polysaccharides extracted by four methods: composition, structure and
in vitro
antioxidant activity. Int J Food Sci Technol 2019. [DOI: 10.1111/ijfs.14413] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Wenhong Gao
- School of Food Science and Engineering South China University of Technology Guangzhou 510641 China
- Overseas Expertise Introduction Centre for Discipline Innovation of Food Nutrition and Human Health (111 Centre) Guangzhou 510641 China
| | - Peilin Zhang
- School of Food Science and Engineering South China University of Technology Guangzhou 510641 China
| | - Pingzhou Lin
- Midea Microwave & Oven Division Midea Group Foshan 528300 China
| | - Xin‐An Zeng
- School of Food Science and Engineering South China University of Technology Guangzhou 510641 China
- Overseas Expertise Introduction Centre for Discipline Innovation of Food Nutrition and Human Health (111 Centre) Guangzhou 510641 China
| | - Margaret A. Brennan
- Centre for Food Research and Innovation Department of Wine, Food and Molecular Biosciences Lincoln University Lincoln 85084 New Zealand
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16
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Li J, Li S, Zheng Y, Zhang H, Chen J, Yan L, Ding T, Linhardt RJ, Orfila C, Liu D, Ye X, Chen S. Fast preparation of rhamnogalacturonan I enriched low molecular weight pectic polysaccharide by ultrasonically accelerated metal-free Fenton reaction. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.05.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Zhu B, Xin C, Li J, Li B. Ultrasonic Degradation of Konjac Glucomannan and the Effect of Freezing Combined with Alkali Treatment on Their Rheological Profiles. Molecules 2019; 24:molecules24101860. [PMID: 31091822 PMCID: PMC6572268 DOI: 10.3390/molecules24101860] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 05/04/2019] [Accepted: 05/09/2019] [Indexed: 11/16/2022] Open
Abstract
The effect of freezing combined with alkali treatment on physicochemical property of konjac glucomannan (KGM) with different molecular weight was investigated in this work. The properties and structure of degraded KGM was characterized by means of intrinsic viscosity measurement, atomic force microscope (AFM) and Fourier transformation infrared (FT-IR). The results suggested that the intrinsic viscosity of KGM solution gradually decreased during the ultrasonic treatment. The AFM observation indicated that KGM with lower viscosity average molecular weight had smaller height and lateral diameter of molecules. The main repeating units of the KGM chain could not be destroyed no matter how long the KGM was sonicated. Rheometrical studies revealed that with increasing alkali concentration from 0% to 0.36%, both viscosities and shear stress of deacetylated konjac glucomannan (Da-KGM) system were increased and moduli G' were substantially higher in either freezing or unfreezing samples. Da-KGM system performed a solid-like behavior (G' > G'') along the frequency range after freezing treatment. With increasing sonication time, both viscosity and shear stress of unfreezing samples were decreased while had an inverse effect for freezing treated samples. The modulus G' and G'' declined for unfreezing samples but rise significantly for freezing treated samples with increase of sonication time.
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Affiliation(s)
- Bo Zhu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China.
| | - Chen Xin
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
- Training Base of Army Logistics, University of PLA, Xiangyang 441000, China.
| | - Jing Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China.
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China.
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Kojima Y, Takayasu M, Toma M, Koda S. Degradation of cellulose in NaOH and NaOH/urea aqueous solutions by ultrasonic irradiation. ULTRASONICS SONOCHEMISTRY 2019; 51:419-423. [PMID: 30072258 DOI: 10.1016/j.ultsonch.2018.07.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 07/17/2018] [Accepted: 07/20/2018] [Indexed: 06/08/2023]
Abstract
Ultrasonic degradation of cellulose with low molecular weight in NaOH and NaOH/urea solutions was investigated at 20 and 500 kHz frequencies by measuring the solution viscosity. The viscosity decreased with sonication time. A small difference in viscosity ratio which is defined as the ratio of specific viscosity of solution after and before sonication was observed for the longer sonication. The degrees of the polymerization were reduced from 230 to 150 for 30 min sonication at 20 kHz and for 120 min sonication at 500 kHz. From XRD measurement, it was estimated that the crystallinity after sonication was the same as that before sonication. The crystallinity structure after sonication corresponded to Cellulose II. The yield of water-soluble components after ultrasonic irradiation was 20 wt% at 20 kHz in NaOH solutions and 30 wt% for 720 min at 500 kHz in NaOH/urea solution. Oligosaccharides and their derivative were detected by the SEC analysis of water-soluble components after sonication.
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Affiliation(s)
- Yoshihiro Kojima
- Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan.
| | - Miyako Takayasu
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Maricella Toma
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Shinobu Koda
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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19
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Lantz KA, Sarkar A, Littrell KC, Li T, Hong K, Stefik M. Cavitation Enables Switchable and Rapid Block Polymer Exchange under High-χN Conditions. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01244] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Kayla A. Lantz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Amrita Sarkar
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | | | - Tianyu Li
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37934, United States
| | - Kunlun Hong
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37934, United States
| | - Morgan Stefik
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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20
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Hou F, Fan L, Ma X, Wang D, Wang W, Ding T, Ye X, Liu D. Degradation of carboxymethylcellulose using ultrasound and β-glucanase: Pathways, kinetics and hydrolysates' properties. Carbohydr Polym 2018; 201:514-521. [PMID: 30241848 DOI: 10.1016/j.carbpol.2018.07.092] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/29/2018] [Accepted: 07/30/2018] [Indexed: 12/18/2022]
Abstract
In order to provide an efficient way to degrade carboxymethylcellulose (CMC), three pathways were investigated: enzymolysis, combination of ultrasound pretreatment and enzymolysis, and sonoenzymolysis. Effects of these treatments on enzymatic kinetics, degradation kinetics and properties of degraded CMC were investigated. The degradation degree of CMC was increased by 18.90% and 35.73% with ultrasound pretreatment (at an intensity of 24 W/mL for 30 min) and sonoenzymolysis (at an intensity of 9 W/mL for 50 min), compared with that obtained under the traditional enzymolysis. Analysis of kinetics demonstrated that ultrasound, both pretreatment and combined with β-glucanase, could accelerate CMC degradation. Measurements of rheological properties, molecular weight and structures of CMC hydrolysates revealed that ultrasound broke the glycosidic bond of CMC chains without changing its primary structure. The sonoenzymolysis process was the most efficient method to degrade CMC, with potential to provide a way to obtain CMC with lowest molecular weight or viscosity.
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Affiliation(s)
- Furong Hou
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Lihua Fan
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Xiaobin Ma
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Danli Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Wenjun Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Tian Ding
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R&D Center for Food Technology and Equipment, Hangzhou 310058, China.
| | - Xingqian Ye
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R&D Center for Food Technology and Equipment, Hangzhou 310058, China.
| | - Donghong Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R&D Center for Food Technology and Equipment, Hangzhou 310058, China.
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21
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Effects of ultrasound pretreatment on the enzymolysis of pectin: Kinetic study, structural characteristics and anti-cancer activity of the hydrolysates. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2017.12.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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22
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Effect of ultrasound pretreatment on enzymolysis and physicochemical properties of corn starch. Int J Biol Macromol 2018; 111:848-856. [DOI: 10.1016/j.ijbiomac.2017.12.156] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/08/2017] [Accepted: 12/28/2017] [Indexed: 12/11/2022]
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23
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Sakai K, Kojiya S, Kamijo J, Tanaka Y, Tanaka K, Maebayashi M, Oh JS, Ito M, Hori M, Shimizu M, Kato M. Oxygen-radical pretreatment promotes cellulose degradation by cellulolytic enzymes. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:290. [PMID: 29213329 PMCID: PMC5713004 DOI: 10.1186/s13068-017-0979-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Accepted: 11/26/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The efficiency of cellulolytic enzymes is important in industrial biorefinery processes, including biofuel production. Chemical methods, such as alkali pretreatment, have been extensively studied and demonstrated as effective for breaking recalcitrant lignocellulose structures. However, these methods have a detrimental effect on the environment. In addition, utilization of these chemicals requires alkali- or acid-resistant equipment and a neutralization step. RESULTS Here, a radical generator based on non-thermal atmospheric pressure plasma technology was developed and tested to determine whether oxygen-radical pretreatment enhances cellulolytic activity. Our results showed that the viscosity of carboxymethyl cellulose (CMC) solutions was reduced in a time-dependent manner by oxygen-radical pretreatment using the radical generator. Compared with non-pretreated CMC, oxygen-radical pretreatment of CMC significantly increased the production of reducing sugars in culture supernatant containing various cellulases from Phanerochaete chrysosporium. The production of reducing sugar from oxygen-radical-pretreated CMC by commercially available cellobiohydrolases I and II was 1.7- and 1.6-fold higher, respectively, than those from non-pretreated and oxygen-gas-pretreated CMC. Moreover, the amount of reducing sugar from oxygen-radical-pretreated wheat straw was 1.8-fold larger than those from non-pretreated and oxygen-gas-pretreated wheat straw. CONCLUSIONS Oxygen-radical pretreatment of CMC and wheat straw enhanced the degradation of cellulose by reducing- and non-reducing-end cellulases in the supernatant of a culture of the white-rot fungus P. chrysosporium. These findings indicated that oxygen-radical pretreatment of plant biomass offers great promise for improvements in lignocellulose-deconstruction processes.
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Affiliation(s)
- Kiyota Sakai
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Saki Kojiya
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Junya Kamijo
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Yuta Tanaka
- Faculty of Science and Technology, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Kenta Tanaka
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | | | - Jun-Seok Oh
- Faculty of Science and Technology, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Masafumi Ito
- Faculty of Science and Technology, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Masaru Hori
- Institute of Innovation for Future Society, Nagoya University, Nagoya, Aichi 464-8603 Japan
| | - Motoyuki Shimizu
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
| | - Masashi Kato
- Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502 Japan
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Muhitdinov B, Heinze T, Normakhamatov N, Turaev A. Preparation of sodium cellulose sulfate oligomers by free-radical depolymerization. Carbohydr Polym 2017; 173:631-637. [DOI: 10.1016/j.carbpol.2017.06.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 05/29/2017] [Accepted: 06/07/2017] [Indexed: 11/29/2022]
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25
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Liu C, Cao Z, Wang J, Sun Z, He S, Chen W. Performance and mechanism of phycocyanin removal from water by low-frequency ultrasound treatment. ULTRASONICS SONOCHEMISTRY 2017; 34:214-221. [PMID: 27773238 DOI: 10.1016/j.ultsonch.2016.05.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 05/25/2016] [Accepted: 05/25/2016] [Indexed: 06/06/2023]
Abstract
Ultrasonication pretreatment of raw water with high content of algal cells might cause an increase in dissolved organic nitrogen (DON) and proteins, which must be removed effectively before coagulation. In this study, the efficiency of sonication treatment in removing typical proteins derived from algal cells was investigated by applying ultrasonic waves at 20, 40, 60, 80, and 100kHz, and the influencing factors and removal mechanism were discussed. The results showed that low-frequency sonication could degrade phycocyanin to some extent, achieving about 95% removal rate after 150min of sonication. However, excitation emission matrix analysis indicated that ultrasonication could not entirely degrade phycocyanin into inorganic nitrogen, and many proteins and nitrogen-containing organics were found in the samples after sonication. While the total nitrogen concentration remained consistent during the entire sonication process (240min), the total inorganic nitrogen concentration increased from 0.6 to 1.3mg/L, indicating that only 33.3% of DON was oxidized into inorganic nitrogen. Nevertheless, sonication could significantly attenuate the interference of phycocyanin in coagulation and enhance coagulation. The mechanical effects and free-radical oxidation resulting from cavitation collapse could be responsible for the degradation of phycocyanin and proteins following sonication. In all, the use of ultrasonic treatment as a posttreatment following sonication to remove algal cells from raw water may not be beneficial.
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Affiliation(s)
- Cheng Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Zhen Cao
- College of Environment, Hohai University, Nanjing 210098, China
| | - Jie Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
| | - Zhehao Sun
- College of Environment, Hohai University, Nanjing 210098, China
| | - Siyuan He
- College of Environment, Hohai University, Nanjing 210098, China
| | - Wei Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.
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26
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Pu Y, Zou Q, Hou D, Zhang Y, Chen S. Molecular weight kinetics and chain scission models for dextran polymers during ultrasonic degradation. Carbohydr Polym 2017; 156:71-76. [DOI: 10.1016/j.carbpol.2016.09.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/19/2016] [Accepted: 09/06/2016] [Indexed: 10/21/2022]
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27
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Anti-inflammatory activity of polysaccharide from Schizophyllum commune as affected by ultrasonication. Int J Biol Macromol 2016; 91:100-5. [DOI: 10.1016/j.ijbiomac.2016.05.052] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 05/03/2016] [Accepted: 05/13/2016] [Indexed: 11/22/2022]
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28
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Nöbel S, Ross NL, Protte K, Körzendörfer A, Hitzmann B, Hinrichs J. Microgel particle formation in yogurt as influenced by sonication during fermentation. J FOOD ENG 2016. [DOI: 10.1016/j.jfoodeng.2016.01.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Belluzo MS, Medina LF, Cortizo AM, Cortizo MS. Ultrasonic compatibilization of polyelectrolyte complex based on polysaccharides for biomedical applications. ULTRASONICS SONOCHEMISTRY 2016; 30:1-8. [PMID: 26703196 DOI: 10.1016/j.ultsonch.2015.11.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 11/11/2015] [Accepted: 11/23/2015] [Indexed: 06/05/2023]
Abstract
In recent years, there has been an increasing interest in the design of biomaterials for cartilage tissue engineering. This type of materials must meet several requirements. In this study, we apply ultrasound to prepare a compatibilized blend of polyelectrolyte complexes (PEC) based on carboxymethyl cellulose (CMC) and chitosan (CHI), in order to improve stability and mechanical properties through the inter-polymer macroradicals coupling produced by sonochemical reaction. We study the kinetic of the sonochemical degradation of each component in order to optimize the experimental conditions for PEC compatibilization. Scaffolds obtained applying this methodology and scaffolds without ultrasound processing were prepared and their morphology (by scanning electron microscopy), polyelectrolyte interactions (by FTIR), stability and mechanical properties were analyzed. The swelling kinetics was studied and interpreted based on the structural differences between the two kinds of scaffolds. In addition we evaluate the possible in vitro cytotoxicity of the scaffolds using macrophage cells in culture. Our results demonstrate that the ultrasound is a very efficient methodology to compatibilize PEC, exhibiting improved properties compared with the simple mixture of the two polysaccharides. The test with murine macrophage RAW 264.7 cells showed no evince of cytotoxicity, suggesting that PEC biomaterials obtained under ultrasound conditions could be useful in the cartilage tissue engineering field.
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Affiliation(s)
- M Soledad Belluzo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata, CC 16 Suc. 4, CONICET, CCT-La Plata, La Plata, Argentina
| | - Lara F Medina
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata, CC 16 Suc. 4, CONICET, CCT-La Plata, La Plata, Argentina; LIOMM (Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, UNLP, La Plata, Argentina
| | - Ana M Cortizo
- LIOMM (Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, UNLP, La Plata, Argentina
| | - M Susana Cortizo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata, CC 16 Suc. 4, CONICET, CCT-La Plata, La Plata, Argentina
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30
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Zhao H, Zhang P, Zhang G, Cheng R. Enhancement of ultrasonic disintegration of sewage sludge by aeration. J Environ Sci (China) 2016; 42:163-167. [PMID: 27090707 DOI: 10.1016/j.jes.2015.08.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 08/12/2015] [Accepted: 08/13/2015] [Indexed: 06/05/2023]
Abstract
Sonication is an effective way for sludge disintegration, which can significantly improve the efficiency of anaerobic digestion to reduce and recycle use of sludge. But high energy consumption limits the wide application of sonication. In order to improve ultrasonic sludge disintegration efficiency and reduce energy consumption, aeration was introduced. Results showed that sludge disintegration efficiency was improved significantly by combining aeration with ultrasound. The aeration flow rate, gas bubble size, ultrasonic density and aeration timing had impacts on sludge disintegration efficiency. Aeration that used in later stage of ultrasonic irradiation with low aeration flow rate, small gas bubbles significantly improved ultrasonic disintegration sludge efficiency. At the optimal conditions of 0.4 W/mL ultrasonic irradiation density, 30 mL/min of aeration flow rate, 5 min of aeration in later stage and small gas bubbles, ultrasonic sludge disintegration efficiency was increased by 45% and one third of ultrasonic energy was saved. This approach will greatly benefit the application of ultrasonic sludge disintegration and strongly promote the treatment and recycle of wastewater sludge.
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Affiliation(s)
- He Zhao
- School of Environment and Natural Resource, Renmin University of China, Beijing 100872, China.
| | - Panyue Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Guangming Zhang
- School of Environment and Natural Resource, Renmin University of China, Beijing 100872, China.
| | - Rong Cheng
- School of Environment and Natural Resource, Renmin University of China, Beijing 100872, China
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31
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Yan JK, Wang YY, Ma HL, Wang ZB. Ultrasonic effects on the degradation kinetics, preliminary characterization and antioxidant activities of polysaccharides from Phellinus linteus mycelia. ULTRASONICS SONOCHEMISTRY 2016; 29:251-7. [PMID: 26585005 DOI: 10.1016/j.ultsonch.2015.10.005] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/07/2015] [Accepted: 10/07/2015] [Indexed: 05/14/2023]
Abstract
In this study, a high-molecular-weight polysaccharide PL-N isolated from the alkaline extract of Phellinus linteus mycelia was degraded by ultrasound. Results showed that ultrasound treatment at different ultrasonic intensities decreased the intrinsic viscosity and molecular weight of PL-N, as well as narrowed the molecular weight distribution. A larger reduction in intrinsic viscosity and molecular weight was caused by a higher ultrasonic intensity. The degradation kinetics model was fitted to (1/Mt-1/M0)=k·t, and the reaction rate constant (k) increased with increasing ultrasonic intensity. Ultrasound degradation did not change the primary structure of PL-N, and scanning electron microscopy analysis indicated that the morphology of the original PL-N was different from that of degraded PL-N fractions. Antioxidant activity assays in vitro indicated that the degraded PL-N fraction with low molecular weight had stronger hydroxyl radical scavenging capacity and higher TEAC and FRAP values.
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Affiliation(s)
- Jing-Kun Yan
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China; Physical Processing of Agricultural Products Key Lab of Jiangsu Province, Zhenjiang 212013, Jiangsu, China.
| | - Yao-Yao Wang
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Hai-Le Ma
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China; Physical Processing of Agricultural Products Key Lab of Jiangsu Province, Zhenjiang 212013, Jiangsu, China
| | - Zhen-Bin Wang
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China; Physical Processing of Agricultural Products Key Lab of Jiangsu Province, Zhenjiang 212013, Jiangsu, China
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32
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Processing surface sizing starch using oxidation, enzymatic hydrolysis and ultrasonic treatment methods—Preparation and application. Carbohydr Polym 2016; 138:273-9. [DOI: 10.1016/j.carbpol.2015.10.086] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 10/09/2015] [Accepted: 10/27/2015] [Indexed: 11/21/2022]
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33
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Radosta S, Kiessler B, Vorwerg W, Brenner T. Molecular composition of surface sizing starch prepared using oxidation, enzymatic hydrolysis and ultrasonic treatment methods. STARCH-STARKE 2016. [DOI: 10.1002/star.201500314] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sylvia Radosta
- Fraunhofer Institute for Applied Polymer Research; Potsdam Germany
| | | | - Waltraud Vorwerg
- Fraunhofer Institute for Applied Polymer Research; Potsdam Germany
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34
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Dianatdar A, Jamshidi M. Investigation of the mechanical properties of a photocatalytic pseudo-paint. J Appl Polym Sci 2016. [DOI: 10.1002/app.42885] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Afshin Dianatdar
- Polymer Research Laboratory, School of Chemical Engineering; Iran University of Science and Technology; Tehran Iran
| | - Masoud Jamshidi
- Polymer Research Laboratory, School of Chemical Engineering; Iran University of Science and Technology; Tehran Iran
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35
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Zhang R, Hou X, Cang Y, Yu Z, Shen Z, Zhou Z, Guo X, Wang J, Zhu X. Efficiently amplified ultrasonic degradation of spherical polyelectrolyte brushes by a magnetic field. RSC Adv 2016. [DOI: 10.1039/c5ra27405b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work describes a facile and green method about the ultrasonic degradation of polymer chains amplified by magnetic field.
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Affiliation(s)
- Rui Zhang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xiaoyan Hou
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yu Cang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zhenchuan Yu
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zheqi Shen
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zhiming Zhou
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Junwei Wang
- Collaborative Innovation Center for Petrochemical New Materials
- Anqing
- China
| | - Xuedong Zhu
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
- Collaborative Innovation Center for Petrochemical New Materials
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36
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Gude VG. Synergism of microwaves and ultrasound for advanced biorefineries. RESOURCE-EFFICIENT TECHNOLOGIES 2015. [DOI: 10.1016/j.reffit.2015.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Gogate PR, Prajapat AL. Depolymerization using sonochemical reactors: A critical review. ULTRASONICS SONOCHEMISTRY 2015; 27:480-494. [PMID: 26186870 DOI: 10.1016/j.ultsonch.2015.06.019] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Revised: 06/19/2015] [Accepted: 06/19/2015] [Indexed: 05/12/2023]
Abstract
Ultrasonic irradiation has been proposed as a novel approach for degradation of polymer compounds, especially considering the fact that the reduction in the molecular weight (also the intrinsic viscosity) is simply by splitting the most susceptible chemical bond without causing any changes in the chemical nature. An overview of the application of ultrasound for the polymer degradation has been presented in this work, discussing the mechanism of degradation, kinetic modeling, effect of operating parameters and the type of reactors generally used for depolymerization. The effect of important operating parameters such as initial polymer concentration, presence of functional groups in the polymer chain, reaction volume, initial molecular weight, temperature, operating frequency, power dissipation and use of process intensifying additives have been discussed also giving guidelines about selection of the optimum parameters. It has been observed that the low concentrations and higher power dissipation (till an optimum) are favorable resulting in higher extents of degradation. Typically low frequency is recommended but for the case of water soluble polymers, higher frequencies would also give similar results due to the dominant action of chemical effects of cavitation. It has been demonstrated that the alkyl group substituent also affects the degradation rate of polymer. An overview of degradation using combined approach based on ultrasound and additives with comparison with individual approach has also been presented. It has been observed that the main contributing factor for the synergy of the combined approach is the selection of optimum loading of additives. Overall, it has been observed that efficient polymer degradation can be achieved using combined process based on the use of ultrasound.
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Affiliation(s)
- Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India.
| | - Amrutlal L Prajapat
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
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38
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39
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Abd Rahman SR, Ku Hamid KH, Alias R, Abd Wahid N. Online Gas Chromatography of Hydrogen and Methane Production from Palm Oil Mill Effleunt (POME) Using High Frequency Ultrasonic Atomization: A Preliminary Study. ADVANCED MATERIALS RESEARCH 2015; 1113:684-689. [DOI: 10.4028/www.scientific.net/amr.1113.684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
This study aims to directly analyze the production of hydrogen and methane gas from POME via high frequency ultrasonication atomization. The advantage of the currently common process was studied in regards to the application of low frequency ultrasonic pretreatment prior to biological processes; anaerobic digestion and fermentation for the production of methane and hydrogen gases respectively. Existing ultrasonic application is limited to sludge disintegration, reducing chemical oxygen demand (COD) values and total solid, while subsequent biological processes take several days to produce gases. However, in this study, high frequency (2.4 MHz) ultrasonic atomization process was able to produce methane and hydrogen gases directly without any biological process. These gases were detected by using an online gas chromatography. The results from the ultrasonication process show that the production gases are consisted majorly of hydrogen compared to methane. Thus, high frequency ultrasonication process can be considered as an alternative method in rapid production of methane and hydrogen gases.
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Zhang L, Zhang X, Liu D, Ding T, Ye X. Effect of degradation methods on the structural properties of citrus pectin. Lebensm Wiss Technol 2015. [DOI: 10.1016/j.lwt.2014.11.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Zhong K, Zhang Q, Tong L, Liu L, Zhou X, Zhou S. Molecular weight degradation and rheological properties of schizophyllan under ultrasonic treatment. ULTRASONICS SONOCHEMISTRY 2015; 23:75-80. [PMID: 25263766 DOI: 10.1016/j.ultsonch.2014.09.008] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Revised: 09/16/2014] [Accepted: 09/16/2014] [Indexed: 06/03/2023]
Abstract
Molecular weight degradation effects of schizophyllan (SPG) under ultrasonic treatments were investigated in this study. The degradation product was treated by alcohol fractional precipitation technology, and the molecular weight and rheological properties of ultrasonic-treated SPG (USPG) fractions were evaluated. Average molecular weight of SPG decreased significantly after ultrasonic treatments, and degradation product had more narrow distribution of molecular weight. The molecular weight degradation kinetics of SPG is adequately described by a second-order reaction. USPG fractions with different molecular weight were obtained by fractional precipitation for final alcohol concentration fractions 0-40%, 40-60% and 60-80%, respectively. USPG fractions had near-Newtonian flow behaviors, and USPG₈₀% exhibited viscous responses over the entire accessible frequency range. Therefore, ultrasonic treatment is a viable modification technology for SPG and other polymer materials with high molecular weight.
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Affiliation(s)
- Kui Zhong
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, PR China; Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, PR China
| | - Qi Zhang
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, PR China; Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, PR China
| | - Litao Tong
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, PR China; Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, PR China
| | - Liya Liu
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, PR China; Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, PR China
| | - Xianrong Zhou
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, PR China; Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, PR China
| | - Sumei Zhou
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, PR China; Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, PR China.
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Peres GL, Leite DC, Silveira NPD. Ultrasound effect on molecular weight reduction of amylopectin. STARCH-STARKE 2015. [DOI: 10.1002/star.201400230] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Gisele Louro Peres
- Bio and Macromolecules; Laboratory of Molecular Dynamics and Instrumentation; Institute of Chemistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Daiani Canabarro Leite
- Bio and Macromolecules; Laboratory of Molecular Dynamics and Instrumentation; Institute of Chemistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Nadya Pesce da Silveira
- Bio and Macromolecules; Laboratory of Molecular Dynamics and Instrumentation; Institute of Chemistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
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Yang H, Liang W, He N, Deng Y, Li Z. Chemiluminescent labels released from long spacer arm-functionalized magnetic particles: a novel strategy for ultrasensitive and highly selective detection of pathogen infections. ACS APPLIED MATERIALS & INTERFACES 2015; 7:774-781. [PMID: 25553360 DOI: 10.1021/am507203s] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Previously, the unique advantages provided by chemiluminescence (CL) and magnetic particles (MPs) have resulted in the development of many useful nucleic acid detection methods. CL is highly sensitive, but when applied to MPs, its intensity is limited by the inner filter-like effect arising from excess dark MPs. Herein, we describe a modified strategy whereby CL labels are released from MPs to eliminate this negative effect. This approach relies on (1) the magnetic capture of target molecules on long spacer arm-functionalized magnetic particles (LSA-MPs), (2) the conjugation of streptavidin-alkaline phosphatase (SA-AP) to biotinylated amplicons of target pathogens, (3) the release of CL labels (specifically, AP tags), and (4) the detection of the released labels. CL labels were released from LSA-MPs through LSA ultrasonication or DNA enzymolysis, which proved to be the superior method. In contrast to conventional MPs, LSA-MPs exhibited significantly improved CL detection, because of the introduction of LSA, which was made of water-soluble carboxymethylated β-1,3-glucan. Detection of hepatitis B virus with this technique revealed a low detection limit of 50 fM, high selectivity, and excellent reproducibility. Thus, this approach may hold great potential for early stage clinical diagnosis of infectious diseases.
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Affiliation(s)
- Haowen Yang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, China
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Gately RD, Warren H, Scardamaglia M, Romeo T, Bittencourt C, in het Panhuis M. Sonication-induced effects on carbon nanofibres in composite materials. RSC Adv 2015. [DOI: 10.1039/c4ra15033c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The preparation, characterization and filling of carbon nanofibre–gellan gum composite materials is presented.
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Affiliation(s)
- Reece D. Gately
- Soft Materials Group
- School of Chemistry
- University of Wollongong
- Wollongong
- Australia
| | - Holly Warren
- Soft Materials Group
- School of Chemistry
- University of Wollongong
- Wollongong
- Australia
| | - Mattia Scardamaglia
- Chimie des Interactions Plasma Surface
- CIRMAP
- University of Mons
- 7000 Mons
- Belgium
| | - Tony Romeo
- Electron Microscope Centre
- AIIM Facility
- University of Wollongong
- Wollongong
- Australia
| | - Carla Bittencourt
- Chimie des Interactions Plasma Surface
- CIRMAP
- University of Mons
- 7000 Mons
- Belgium
| | - Marc in het Panhuis
- Soft Materials Group
- School of Chemistry
- University of Wollongong
- Wollongong
- Australia
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Kobayashi D, Honma C, Matsumoto H, Takahashi T, Kuroda C, Otake K, Shono A. Kinetics analysis for development of a rate constant estimation model for ultrasonic degradation reaction of methylene blue. ULTRASONICS SONOCHEMISTRY 2014; 21:1489-1495. [PMID: 24439912 DOI: 10.1016/j.ultsonch.2013.12.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 12/20/2013] [Accepted: 12/24/2013] [Indexed: 06/03/2023]
Abstract
Ultrasound has been used as an advanced oxidation method for wastewater treatment. Sonochemical degradation of organic compounds in aqueous solution occurs by pyrolysis and/or reaction with hydroxyl radicals. Moreover, kinetics of sonochemical degradation has been proposed. However, the effect of ultrasonic frequency on degradation rate has not been investigated. In our previous study, a simple model for estimating the apparent degradation rate of methylene blue was proposed. In this study, sonochemical degradation of methylene blue was performed at various frequencies. Apparent degradation rate constant was evaluated assuming that sonochemical degradation of methylene blue was a first-order reaction. Specifically, we focused on effects of ultrasonic frequency and power on rate constant, and the applicability of our proposed model was demonstrated. Using this approach, maximum sonochemical degradation rate was observed at 490 kHz, which agrees with a previous investigation into the effect of frequency on the sonochemical efficiency value evaluated by KI oxidation dosimetry. Degradation rate increased with ultrasonic power at every frequency. It was also observed that threshold power must be reached for the degradation reaction to progress. The initial methylene blue concentration and the apparent degradation rate constant have a relation of an inverse proportion. Our proposed model for estimating the apparent degradation rate constant using ultrasonic power and sonochemical efficiency value can apply to this study which extended the frequency and initial concentration range.
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Affiliation(s)
- Daisuke Kobayashi
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Chiemi Honma
- Department of Chemical Science and Technology, Graduate School of Chemical Science and Technology, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hideyuki Matsumoto
- Department of Chemical Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo 152-8550, Japan
| | - Tomoki Takahashi
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Chiaki Kuroda
- Department of Chemical Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo 152-8550, Japan
| | - Katsuto Otake
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Atsushi Shono
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
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Song L, Li Y, He P, Zhang S, Wu X, Fang S, Shan J, Sun D. Synthesis and sonocatalytic property of rod-shape Sr(OH)2·8H2O. ULTRASONICS SONOCHEMISTRY 2014; 21:1318-1324. [PMID: 24486080 DOI: 10.1016/j.ultsonch.2014.01.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 12/28/2013] [Accepted: 01/06/2014] [Indexed: 06/03/2023]
Abstract
A novel rod-shape sonocatalyst Sr(OH)2·8H2O was prepared by a facile precipitation method, and characterized by X-ray powder diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy and UV-vis absorption spectroscopy. Comparative sonocatalytic degradation experiments were carried out in different conditions under ultrasonic irradiation by using rhodamine B (RhB) as the model substrate, indicating that Sr(OH)2·8H2O was highly sonocatalytic. Total organic carbon experiment demonstrated Sr(OH)2·8H2O with mass mineralization of organic carbon. The effects of catalyst amount, initial RhB concentration and ultrasonic energy of degradation were investigated, and the sonocatalyst could be reused 5 times without significant loss of activity. Furthermore, the potent degrading capability was ascribed to ultrasonic cavitation producing flash light/energy which generated radicals (e.g., OH) with high oxidation activity.
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Affiliation(s)
- Limin Song
- College of Environment and Chemical Engineering, State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Yamiao Li
- College of Environment and Chemical Engineering, State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Peizhi He
- College of Environment and Chemical Engineering, State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Shujuan Zhang
- College of Science, Tianjin University of Science & Technology, Tianjin 300457, PR China
| | - Xiaoqing Wu
- Institute of Composite Materials, Ministry of Education Key Laboratory of Advanced Textile Composite Materials, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Sheng Fang
- College of Environment and Chemical Engineering, State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Juanjuan Shan
- College of Environment and Chemical Engineering, State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Donglan Sun
- College of Environment and Chemical Engineering, State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
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Taghizadeh MT, Bahadori A. Ultrasonic degradation of N-di and trihydroxy benzoyl chitosans and its effects on antioxidant activity. ULTRASONICS SONOCHEMISTRY 2014; 21:1140-1149. [PMID: 24290057 DOI: 10.1016/j.ultsonch.2013.11.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Revised: 08/19/2013] [Accepted: 11/04/2013] [Indexed: 06/02/2023]
Abstract
Modified chitosans with 3,4-dihydroxy benzoyl groups (CS-DHBA) and 3,4,5-trihydroxy benzoyl groups (CS-THBA) were synthesized and their chemical structures were determined by Fourier transform infrared (FT-IR) and (1)H nuclear magnetic resonance ((1)H NMR) spectroscopy. Then, ultrasonic degradation of CS, CS-DHBA and CS-THBA in 1% acetic acid solution was investigated. The kinetics studies of degradation were followed by gel permeation chromatography (GPC). The results indicated that the weight-average molecular weight of chitosan decreased obviously after ultrasound treatment, but molecular weights of CS-DHBA and CS-THBA decreased slowly with increasing sonication time. Degradation kinetics model based on 1/Mt-1/M0=kt was used to estimate the degradation rate constant. It was found that the rates of degradation of CS-DHBA and CS-THBA are lower than CS, and follow the order: CS4>CS8>CS12>CS-THBA4>CS-THBA8 ≈ CS-DHBA4>CS-THBA12>CS-DHBA8>CS-DHBA12. The antioxidant activity of the CS, CS-DHBA and CS-THBA before and after sonication was investigated by the radical scavenging activity method using 1,1-diphenyl-2-picrylhydrazyl (DPPH). The DPPH scavenging free radical capacity of CS-THBA and CS-DHBA increased up to 89% and 74% respectively, when the concentration reached 6 μg/ml. The ultrasonic treatment of CS-DHBA and CS-THBA after 30 min decreased the DPPH free radical scavenging activity but ultrasonic treatment of CS increased the DPPH free radical scavenging activity.
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Affiliation(s)
| | - Ali Bahadori
- Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
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Tran KVB, Kimura T, Kondo T, Koda S. Quantification of frequency dependence of mechanical effects induced by ultrasound. ULTRASONICS SONOCHEMISTRY 2014; 21:716-21. [PMID: 24051304 DOI: 10.1016/j.ultsonch.2013.08.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 08/26/2013] [Accepted: 08/26/2013] [Indexed: 05/14/2023]
Abstract
The physical or mechanical effects induced by ultrasound were investigated through the viscosity change in degradation of polymers. The viscosity change was observed with polyethylene oxide in both aqueous and benzene solution; while polystyrene in only benzene solution. The frequency of ultrasound in these experiments varies from 20 kHz to 1 MHz, under a constant dissipated power. The viscosity ratio and the apparent degradation rate were obtained as a function of the irradiation frequency. From the analysis of these experiments, the mechanical effects are found to slow down above 100 kHz when the frequency increases. In case of the analysis of solution viscosity, since this method yields the same apparent results in both aqueous and benzene solutions, our study propose an alternative simple, cost effective method to quantify the mechanical effects in sonochemistry.
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Affiliation(s)
- Khuyen Viet Bao Tran
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan.
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Hernoux-Villière A, Lassi U, Lévêque JM. An original ultrasonic reaction with dual coaxial frequencies for biomass processing. ULTRASONICS SONOCHEMISTRY 2013; 20:1341-1344. [PMID: 23701817 DOI: 10.1016/j.ultsonch.2013.04.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 04/22/2013] [Accepted: 04/25/2013] [Indexed: 06/02/2023]
Abstract
An advanced dual frequency ultrasonic coaxial reactor enabling simultaneously low and high frequencies irradiating in the same direction was developed to focus both mechanical and chemical effects on a concentrated area. The prototype was straightforward employed for the conversion of a starch-based industrial waste into sugars.
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