Ultrasound-assisted synthesis of graphene@MXene hybrid: A novel and promising material for electrochemical sensing
Ultrason Sonochem. 2022 Oct 22;90:106208. doi: 10.1016/j.ultsonch.2022.106208. Online ahead of print.ABSTRACTTo date, multiple graphene@MXene hybrids have been reported via various synthesis approaches, but almost all the graphene@MXene hybrids inevitably used the reduced graphene oxide that prepared by chemical oxidation/reduction method, which generally involved the complex and dangerous operation procedure, and the highly toxic chemical reagent. How to prepare graphene@MXene hybrid through a simple, safe and eco-friendly synthetic route is highly desired. Compared with traditional synthesis technology, ultrasound synthe...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Shenchao Shi Ruizheng Zhong Lele Li Chidan Wan Can Wu Source Type: research

Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys
Ultrason Sonochem. 2022 Oct 25;90:106209. doi: 10.1016/j.ultsonch.2022.106209. Online ahead of print.ABSTRACTAlthough the ultrasonic treatment of molten aluminum has been studied for long period, there is still much to be revealed for this process. Many studies have focused on the investigation of acoustic cavitation and streaming under the horn tip and their effects on the treatment efficiency. However, to the best of our knowledge, no attempt has been done to explain phenomena occurring near or on the melt free surface. Thus, the goal of this study is to investigate phenomena occurring at the free surface during ultrasou...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Jincheng Sun Kennosuke Higashi Sergey Romankov Takuya Yamamoto Sergey Komarov Source Type: research

Effects of ultrasound-assisted H < sub > 2 < /sub > O < sub > 2 < /sub > on the solubilization and antioxidant activity of yeast β-glucan
In this study, through the combined degradation of ultrasonic waves and H2O2, and the optimization of the main process parameters for solubilizing YG by response surface methodology (RSM), a new product of YGUH was generated. The molecular weight, structural characteristics and degradation kinetics before and after solubilization were evaluated. The results showed that the optimal solubilization conditions were reaction time: 4 h, ultrasonic power: 3 W/mL, H2O2 concentration: 24 %. Under these conditions, ultrasound-assisted H2O2 increased the solubility (from 13.60 % to 70.00 %) and reduced molecular weight (from 6.73 × ...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Xia Ma Lin Dong Yan He Shiwen Chen Source Type: research

Effects of ultrasound-assisted thawing on lamb meat quality and oxidative stability during refrigerated storage using non-targeted metabolomics
In this study, 44 (UT1 and FW1) and 47 (UT7 and FW7) differentially expressed metabolites were identified, including amino acids, carbohydrates and their conjugates, nucleic acids, carbonyl compounds and others. The results of this study provide data to clarify the differences between UT and FW, and lay a foundation for the application of ultrasound-assisted thawing in the meat industry.PMID:36327923 | PMC:PMC9619372 | DOI:10.1016/j.ultsonch.2022.106211 (Source: Ultrasonics Sonochemistry)
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Chenchen Xu Mingwu Zang Xiaoling Qiao Shouwei Wang Bing Zhao Yuxuan Shi Jing Bai Jiajia Wu Source Type: research

Influence of the ultrasound cavitation intensity on reduced graphene oxide functionalization
In this study, we aimed to achieve the functionalization of reduced graphene oxide (rGO) by sonication in a one-step process using polyvinyl alcohol (PVA) as a model molecule to be bound to the rGO surface. We investigated the influence of the sonication energy on the efficacy of rGO functionalization. The correlation between the performance of the high-intensity ultrasonic horn and the synthesis of the PVA functionalized rGO was thoroughly investigated by TGA coupled with MS, and IR, Raman, XPS, Laser diffraction, and SEM analysis. The results show that the most soluble PVA-functionalized rGO is achieved at 50% of the ult...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Ale š Ručigaj Justin G Connell Matev ž Dular Bo štjan Genorio Source Type: research

Ultrasound-alkaline combined extraction improves the release of bound polyphenols from pitahaya (Hylocereus undatus 'Foo-Lon') peel: Composition, antioxidant activities and enzyme inhibitory activity
In this study, ultrasound-assisted alkaline hydrolysis was used to extract polyphenols from pitahaya peel. The effects of sonication time, ultrasonic density, NaOH concentration and the liquid-material ratio on the total phenolic content (TPC), total flavonoid content (TFC) and antioxidant activity of the extracts were studied. The composition and content difference of the extracts were analyzed and the inhibitory effect of α-amylase and α-glucosidase was measured. The results of single-factor analysis showed that when the sonication time was 45 min, the ultrasonic density was 32 W/L, the NaOH solution concentration was ...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Xuanyu Zhong Shuyan Zhang Hong Wang Jinyi Yang Lin Li Jie Zhu Yujia Liu Source Type: research

Effects of gas saturation and sparging on sonochemical oxidation activity in open and closed systems, Part I: H < sub > 2 < /sub > O < sub > 2 < /sub > generation
In this study (Part I), the effects of gas saturation and sparging on the generation of H2O2 were investigated in a 28-kHz sonoreactor system. Four gas modes, saturation/closed, saturation/open, sparging/closed, and sparging/open, were applied to Ar, O2, N2, and binary gas mixtures. The change in dissolved oxygen (DO) concentration during ultrasonic irradiation was measured and was used as an indicator of whether the gaseous exchange between liquid and air altered the gas content of the liquid. Considerable difference in the DO concentration was observed for the gas saturation/open mode, ranging from -11.5 mg/L (O2 100 %) ...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Younggyu Son Jieun Seo Source Type: research

Ultrasound-assisted synthesis of graphene@MXene hybrid: A novel and promising material for electrochemical sensing
Ultrason Sonochem. 2022 Oct 22;90:106208. doi: 10.1016/j.ultsonch.2022.106208. Online ahead of print.ABSTRACTTo date, multiple graphene@MXene hybrids have been reported via various synthesis approaches, but almost all the graphene@MXene hybrids inevitably used the reduced graphene oxide that prepared by chemical oxidation/reduction method, which generally involved the complex and dangerous operation procedure, and the highly toxic chemical reagent. How to prepare graphene@MXene hybrid through a simple, safe and eco-friendly synthetic route is highly desired. Compared with traditional synthesis technology, ultrasound synthe...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Shenchao Shi Ruizheng Zhong Lele Li Chidan Wan Can Wu Source Type: research

Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys
Ultrason Sonochem. 2022 Oct 25;90:106209. doi: 10.1016/j.ultsonch.2022.106209. Online ahead of print.ABSTRACTAlthough the ultrasonic treatment of molten aluminum has been studied for long period, there is still much to be revealed for this process. Many studies have focused on the investigation of acoustic cavitation and streaming under the horn tip and their effects on the treatment efficiency. However, to the best of our knowledge, no attempt has been done to explain phenomena occurring near or on the melt free surface. Thus, the goal of this study is to investigate phenomena occurring at the free surface during ultrasou...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Jincheng Sun Kennosuke Higashi Sergey Romankov Takuya Yamamoto Sergey Komarov Source Type: research

Effects of ultrasound-assisted H < sub > 2 < /sub > O < sub > 2 < /sub > on the solubilization and antioxidant activity of yeast β-glucan
In this study, through the combined degradation of ultrasonic waves and H2O2, and the optimization of the main process parameters for solubilizing YG by response surface methodology (RSM), a new product of YGUH was generated. The molecular weight, structural characteristics and degradation kinetics before and after solubilization were evaluated. The results showed that the optimal solubilization conditions were reaction time: 4 h, ultrasonic power: 3 W/mL, H2O2 concentration: 24 %. Under these conditions, ultrasound-assisted H2O2 increased the solubility (from 13.60 % to 70.00 %) and reduced molecular weight (from 6.73 × ...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Xia Ma Lin Dong Yan He Shiwen Chen Source Type: research

Effects of ultrasound-assisted thawing on lamb meat quality and oxidative stability during refrigerated storage using non-targeted metabolomics
In this study, 44 (UT1 and FW1) and 47 (UT7 and FW7) differentially expressed metabolites were identified, including amino acids, carbohydrates and their conjugates, nucleic acids, carbonyl compounds and others. The results of this study provide data to clarify the differences between UT and FW, and lay a foundation for the application of ultrasound-assisted thawing in the meat industry.PMID:36327923 | DOI:10.1016/j.ultsonch.2022.106211 (Source: Ultrasonics Sonochemistry)
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Chenchen Xu Mingwu Zang Xiaoling Qiao Shouwei Wang Bing Zhao Yuxuan Shi Jing Bai Jiajia Wu Source Type: research

Influence of the ultrasound cavitation intensity on reduced graphene oxide functionalization
In this study, we aimed to achieve the functionalization of reduced graphene oxide (rGO) by sonication in a one-step process using polyvinyl alcohol (PVA) as a model molecule to be bound to the rGO surface. We investigated the influence of the sonication energy on the efficacy of rGO functionalization. The correlation between the performance of the high-intensity ultrasonic horn and the synthesis of the PVA functionalized rGO was thoroughly investigated by TGA coupled with MS, and IR, Raman, XPS, Laser diffraction, and SEM analysis. The results show that the most soluble PVA-functionalized rGO is achieved at 50% of the ult...
Source: Ultrasonics Sonochemistry - November 3, 2022 Category: Chemistry Authors: Ale š Ručigaj Justin G Connell Matev ž Dular Bo štjan Genorio Source Type: research

Ultrasonically synthesized MOFs for modification of polymeric membranes: A critical review
Ultrason Sonochem. 2022 Oct 14;90:106202. doi: 10.1016/j.ultsonch.2022.106202. Online ahead of print.ABSTRACTMetal-organic framework (MOF) membranes hold the promise for energy-efficient separation processes. These nanocrystalline compounds can effectively separate materials with different sizes and shapes at a molecular level. Furthermore, MOFs are excellent candidates for improving membrane permeability and/or selectivity due to their unique properties, such as high specific area and special wettability. Generally, MOFs can be used as fillers in mixed matrix membranes (MMMs) or incorporated onto the membrane surface to m...
Source: Ultrasonics Sonochemistry - October 24, 2022 Category: Chemistry Authors: Amirhossein Taghipour Ahmad Rahimpour Masoud Rastgar Mohtada Sadrzadeh Source Type: research

Cactus polysaccharides enhance preservative effects of ultrasound treatment on fresh-cut potatoes
Ultrason Sonochem. 2022 Oct 17;90:106205. doi: 10.1016/j.ultsonch.2022.106205. Online ahead of print.ABSTRACTThe shelf life of fresh-cut fruits and vegetables is affected by microbial growth, enzymatic browning, and loss of flavor. Although ultrasound (US) treatment is often used in the preservation of fresh-cut fruits and vegetables, it has limited antibacterial and preservative effects. Here, we used cactus polysaccharides (CP) to enhance the preservative effect of ultrasound treatment and extended the shelf life of fresh-cut potatoes. The results showed that combined treatment (CP + US) exerted better antimicrobial and ...
Source: Ultrasonics Sonochemistry - October 24, 2022 Category: Chemistry Authors: Dewei Cheng Qianyun Ma Jianhui Zhang Kaili Jiang Shijia Cai Wenxiu Wang Jie Wang Jianfeng Sun Source Type: research

Cavitation erosion by shockwave self-focusing of a single bubble
Ultrason Sonochem. 2022 Aug 22;90:106131. doi: 10.1016/j.ultsonch.2022.106131. Online ahead of print.ABSTRACTThe ability of cavitation bubbles to effectively focus energy is made responsible for cavitation erosion, traumatic brain injury, and even for catalyse chemical reactions. Yet, the mechanism through which material is eroded remains vague, and the extremely fast and localized dynamics that lead to material damage has not been resolved. Here, we reveal the decisive mechanism that leads to energy focusing during the non-spherical collapse of cavitation bubbles and eventually results to the erosion of hardened metals. W...
Source: Ultrasonics Sonochemistry - October 24, 2022 Category: Chemistry Authors: Fabian Reuter Carsten Deiter Claus-Dieter Ohl Source Type: research