Ultrasonics Sonochemistry最新文献

英文中文

Enhancing the washing of harvested quinoa seeds with ultrasound-assisted hydration

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-12 DOI: 10.1016/j.ultsonch.2025.107307

Hongbin Bai, Yingsi Wu, Fei Liu, Dezheng Xuan, Xuan Zhao, Wenxue Dong

To improve the efficiency of harvested quinoa seed wash processing, this study comparatively evaluated the effects of ultrasound-assisted hydration (UH) and conventional hydration (CH) on hydration dynamics, saponin mass transfer kinetics, and pericarp structural changes in quinoa seeds. Moisture uptake was monitored using a gravimetric method, saponin content was determined through enzyme-linked immunosorbent assay, and pericarp structural changes were observed via scanning electron microscopy. The results showed that UH significantly enhanced the water absorption rate of quinoa seeds, with the Peleg model effectively fitting all hydration stages (R² > 0.93). The saponin content in the seeds decreased rapidly at first and then stabilized, with the most significant reduction occurring within the first 30 min of soaking. UH reduced the saponin content by 52 %–73 %, outperforming CH, which reduced it by 42 %–53 %. Fick’s diffusion model indicated that UH significantly increased the effective diffusion coefficient (D_eff) of saponins and reduced the activation energy (E_a from 21.83 to 18.15 kJ/mol). SEM images confirmed that UH accelerated the rupture and pore formation of the pericarp. All kinetic models showed good fitting performance, with the Weibull and two-term models providing the best fit under both CH and UH conditions, evidenced by the highest R² and lowest SSE, RMSE, and χ² values. These findings contribute to optimizing industrial quinoa processing, enhancing efficiency and sustainability, and provide valuable guidance for the application of ultrasound technology in grain-based food development.

{"title":"Enhancing the washing of harvested quinoa seeds with ultrasound-assisted hydration","authors":"Hongbin Bai, Yingsi Wu, Fei Liu, Dezheng Xuan, Xuan Zhao, Wenxue Dong","doi":"10.1016/j.ultsonch.2025.107307","DOIUrl":"10.1016/j.ultsonch.2025.107307","url":null,"abstract":"<div><div>To improve the efficiency of harvested quinoa seed wash processing, this study comparatively evaluated the effects of ultrasound-assisted hydration (UH) and conventional hydration (CH) on hydration dynamics, saponin mass transfer kinetics, and pericarp structural changes in quinoa seeds. Moisture uptake was monitored using a gravimetric method, saponin content was determined through enzyme-linked immunosorbent assay, and pericarp structural changes were observed via scanning electron microscopy. The results showed that UH significantly enhanced the water absorption rate of quinoa seeds, with the Peleg model effectively fitting all hydration stages (R<sup>2</sup> > 0.93). The saponin content in the seeds decreased rapidly at first and then stabilized, with the most significant reduction occurring within the first 30 min of soaking. UH reduced the saponin content by 52 %–73 %, outperforming CH, which reduced it by 42 %–53 %. Fick’s diffusion model indicated that UH significantly increased the effective diffusion coefficient (<em>D</em><sub>eff</sub>) of saponins and reduced the activation energy (<em>E</em><sub>a</sub> from 21.83 to 18.15 kJ/mol). SEM images confirmed that UH accelerated the rupture and pore formation of the pericarp. All kinetic models showed good fitting performance, with the Weibull and two-term models providing the best fit under both CH and UH conditions, evidenced by the highest R<sup>2</sup> and lowest SSE, RMSE, and χ<sup>2</sup> values. These findings contribute to optimizing industrial quinoa processing, enhancing efficiency and sustainability, and provide valuable guidance for the application of ultrasound technology in grain-based food development.</div></div>","PeriodicalId":442,"journal":{"name":"Ultrasonics Sonochemistry","volume":"116 ","pages":"Article 107307"},"PeriodicalIF":8.7,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of calcium chloride and ultrasonication pre-treatment to mitigate the microbial load on fresh carrots using response surface methodology 利用响应面方法优化氯化钙和超声波预处理，以减轻新鲜胡萝卜上的微生物负荷

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-12 DOI: 10.1016/j.ultsonch.2025.107311

Muhammad Sameem Javed , Haq Nawaz , Fatima Filza , Muhammad Junaid Anwar , Faiz Ul Hassan Shah , Umair Ali , Muhammad Rizwan Tariq , Hammad Hafeez , Tawfiq Alsulami , Yash D. Jagdale , Robert Mugabi , Gulzar Ahmad Nayik

The quality and safety of fruits and vegetables are the major concerns of the food industry. The quality of these foods depends on their safety during storage and processing. The current research was designed to improve the quality by optimizing the safety parameters to minimize the microbial load of carrots during processing and storage. Three process variables including ultrasonication time, ultrasonication temperature, and calcium chloride concentration were optimized, each at five levels, to find the minimum optimal response of microbial load in terms of total plate count (TPC), total coliform count (TCC) and yeast mold count (YMC) using response surface central composite design. The selected factors showed statistically significant (p < 0.05) linear negative effect on TPC and linear positive effect on YMC. The total plate count, total coliform count, and yeast mold count were reduced to 6.117, 5.689, and 6.021 log CFU/mL respectively, under the optimum conditions i.e., ultrasonication time (17.97 min), temperature (43.885 °C), and CaCl₂ concentration (181.211 mg/L). The non-significant interaction or quadratic effect of selected factors was observed on any of the studied responses. Concludingly, the reduction in studied parameters can improve the safety measurements of foods.

水果和蔬菜的质量和安全是食品工业关注的主要问题。这些食品的质量取决于其在贮藏和加工过程中的安全性。目前的研究旨在通过优化安全参数来提高质量，从而最大限度地减少胡萝卜在加工和储存过程中的微生物负荷。采用响应面中心复合设计，对三个工艺变量（包括超声时间、超声温度和氯化钙浓度）进行了优化，每个变量有五个水平，以找到微生物负荷的最小最优响应，即总平板计数（TPC）、总大肠菌群计数（TCC）和酵母霉菌计数（YMC）。所选因子对 TPC 和 YMC 的线性负效应和线性正效应具有显著的统计学意义（p < 0.05）。在最佳条件下，即超声时间（17.97 分钟）、温度（43.885 °C）和 CaCl2 浓度（181.211 毫克/升），平板总数、总大肠菌群数和酵母菌数分别降低到 6.117、5.689 和 6.021 log CFU/mL。所选因素对所研究反应的交互作用或二次效应均不显著。总之，减少所研究的参数可提高食品的安全性测量。

{"title":"Optimization of calcium chloride and ultrasonication pre-treatment to mitigate the microbial load on fresh carrots using response surface methodology","authors":"Muhammad Sameem Javed , Haq Nawaz , Fatima Filza , Muhammad Junaid Anwar , Faiz Ul Hassan Shah , Umair Ali , Muhammad Rizwan Tariq , Hammad Hafeez , Tawfiq Alsulami , Yash D. Jagdale , Robert Mugabi , Gulzar Ahmad Nayik","doi":"10.1016/j.ultsonch.2025.107311","DOIUrl":"10.1016/j.ultsonch.2025.107311","url":null,"abstract":"<div><div>The quality and safety of fruits and vegetables are the major concerns of the food industry. The quality of these foods depends on their safety during storage and processing. The current research was designed to improve the quality by optimizing the safety parameters to minimize the microbial load of carrots during processing and storage. Three process variables including ultrasonication time, ultrasonication temperature, and calcium chloride concentration were optimized, each at five levels, to find the minimum optimal response of microbial load in terms of total plate count (TPC), total coliform count (TCC) and yeast mold count (YMC) using response surface central composite design. The selected factors showed statistically significant (p < 0.05) linear negative effect on TPC and linear positive effect on YMC. The total plate count, total coliform count, and yeast mold count were reduced to 6.117, 5.689, and 6.021 log CFU/mL respectively, under the optimum conditions i.e., ultrasonication time (17.97 min), temperature (43.885 °C), and CaCl<sub>2</sub> concentration (181.211 mg/L). The non-significant interaction or quadratic effect of selected factors was observed on any of the studied responses. Concludingly, the reduction in studied parameters can improve the safety measurements of foods.</div></div>","PeriodicalId":442,"journal":{"name":"Ultrasonics Sonochemistry","volume":"116 ","pages":"Article 107311"},"PeriodicalIF":8.7,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bubble collapse dynamics near the composite walls: Progress and challenges

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-10 DOI: 10.1016/j.ultsonch.2025.107298

Yichen Zhu , Xiaojian Ma , Ruiquan Zhou , Yuwei Sun , Mindi Zhang

Bubble dynamics near the composite walls has become one of the major issues in the fields of aerospace, underwater weapons, and mechanical engineering. The present work reviews recent progress made towards developing experimental and numerical investigation for interaction of bubble dynamics and composite response. The goal of our overall efforts is to (1) summarize the progress made in the experimental and numerical modeling and approaches for bubble dynamics near various composite walls, (2) discuss the effect of designability of the composite materials on the bubble dynamics, with special emphasis on the variations of fiber orientation and ply number of composite walls, as well as correspondingly accompanied by tilted jets and opposite migration of bubbles, with experimental and numerical modeling and approaches, (3) improve the understanding of relationship between bubble dynamic behaviors and material’s specific stiffness via experimental data and modified deep neural network method, with particular emphasis on the critical condition of bubble migration under the actions of various material properties. Issues including the mechanism of bubble–wall interaction are discussed.

{"title":"Bubble collapse dynamics near the composite walls: Progress and challenges","authors":"Yichen Zhu , Xiaojian Ma , Ruiquan Zhou , Yuwei Sun , Mindi Zhang","doi":"10.1016/j.ultsonch.2025.107298","DOIUrl":"10.1016/j.ultsonch.2025.107298","url":null,"abstract":"<div><div>Bubble dynamics near the composite walls has become one of the major issues in the fields of aerospace, underwater weapons, and mechanical engineering. The present work reviews recent progress made towards developing experimental and numerical investigation for interaction of bubble dynamics and composite response. The goal of our overall efforts is to (1) summarize the progress made in the experimental and numerical modeling and approaches for bubble dynamics near various composite walls, (2) discuss the effect of designability of the composite materials on the bubble dynamics, with special emphasis on the variations of fiber orientation and ply number of composite walls, as well as correspondingly accompanied by tilted jets and opposite migration of bubbles, with experimental and numerical modeling and approaches, (3) improve the understanding of relationship between bubble dynamic behaviors and material’s specific stiffness via experimental data and modified deep neural network method, with particular emphasis on the critical condition of bubble migration under the actions of various material properties. Issues including the mechanism of bubble–wall interaction are discussed.</div></div>","PeriodicalId":442,"journal":{"name":"Ultrasonics Sonochemistry","volume":"116 ","pages":"Article 107298"},"PeriodicalIF":8.7,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How well ultrasonic waves penetrate glass, SS, and plastics?

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-07 DOI: 10.1016/j.ultsonch.2025.107308

Nguyen Van Kien , Young Han Jeong , Sunghwan Kim , Jae Jeong Ryoo

To effectively utilize ultrasound, it is crucial to identify materials and media that facilitate optimal penetration. Extraction and aluminum foil erosion experiments were performed using beakers made of glass, stainless steel, and various plastics (PE, PFA, and PTFE) under different ultrasonic conditions. Additionally, ultrasound-assisted chromatography was conducted in six solutions with varying surface tensions: water, alcohol, 6% and 17% NaOH, and 20% and 35% sucrose in water. The results of the extraction and erosion experiments indicated that glass demonstrated the highest extraction efficiency and the strongest physical effects, with minimal ultrasound energy attenuation, particularly under sweep mode and low-frequency conditions. In chromatography, the findings showed that ultrasound transmission was more effective in a 6% NaOH aqueous solution compared to water.

引用次数: 0

Study on the quality characteristics of jujube slices under different pretreatment and drying methods

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-06 DOI: 10.1016/j.ultsonch.2025.107305

Zhengdong Wan , Zhuofan Ji , Dandan Zhao , Yamei Liu , Zhentao Zhang , Jianxiong Hao

This study investigates the effects of different pretreatment methods, cold plasma (CP) and ultrasound (US), as well as different drying techniques, including vacuum freeze-drying (FD), hot air drying (HAD), and microwave coupled with pulsed vacuum drying (MPVD), on the quality characteristics of winter jujube slices. The physical, chemical, and functional properties were analyzed, encompassing farinograph attributes, particle size, cation exchange capacity, total phenolic and flavonoid content, and flavor compounds were analyzed. In terms of physical properties, jujube slices subjected to MPVD demonstrate superior water-holding capacity at 2.93 g/g and enhanced fluidity, with a sliding angle of 34.98° and an angle of repose of 43.47°, compared to FD jujube slices. Additionally, it exhibits a rehydration capacity of 2.98 g/g and a bulk density of 0.49 g/mL. Regarding chemical composition, the cation exchange capacity of US-FD jujube slices is measured at 0.64 mmol/g, while the total phenolic content reaches 11.97 mg/g, and the flavonoid content in CP-MPVD jujube slices is 5.21 mg/g. Notably, the cation exchange capacity of MPVD jujube slices pretreated by CP and US is 0.46 and 0.55 mmol/g, respectively. Concerning volatile compounds and flavor, FD slices retain higher concentrations of aldehydes (11.39 %) and alkenes (16.88 %), whereas MPVD slices contain 21.20 % alkanes. HAD slices contain the highest aromatic hydrocarbon content at 34.97 %. In summary, the optimized combination of CP and MPVD can enhance the drying efficiency of jujube slices, increase the flavonoid content in jujube slices, and improve their quality characteristics.

{"title":"Study on the quality characteristics of jujube slices under different pretreatment and drying methods","authors":"Zhengdong Wan , Zhuofan Ji , Dandan Zhao , Yamei Liu , Zhentao Zhang , Jianxiong Hao","doi":"10.1016/j.ultsonch.2025.107305","DOIUrl":"10.1016/j.ultsonch.2025.107305","url":null,"abstract":"<div><div>This study investigates the effects of different pretreatment methods, cold plasma (CP) and ultrasound (US), as well as different drying techniques, including vacuum freeze-drying (FD), hot air drying (HAD), and microwave coupled with pulsed vacuum drying (MPVD), on the quality characteristics of winter jujube slices. The physical, chemical, and functional properties were analyzed, encompassing farinograph attributes, particle size, cation exchange capacity, total phenolic and flavonoid content, and flavor compounds were analyzed. In terms of physical properties, jujube slices subjected to MPVD demonstrate superior water-holding capacity at 2.93 g/g and enhanced fluidity, with a sliding angle of 34.98° and an angle of repose of 43.47°, compared to FD jujube slices. Additionally, it exhibits a rehydration capacity of 2.98 g/g and a bulk density of 0.49 g/mL. Regarding chemical composition, the cation exchange capacity of US-FD jujube slices is measured at 0.64 mmol/g, while the total phenolic content reaches 11.97 mg/g, and the flavonoid content in CP-MPVD jujube slices is 5.21 mg/g. Notably, the cation exchange capacity of MPVD jujube slices pretreated by CP and US is 0.46 and 0.55 mmol/g, respectively. Concerning volatile compounds and flavor, FD slices retain higher concentrations of aldehydes (11.39 %) and alkenes (16.88 %), whereas MPVD slices contain 21.20 % alkanes. HAD slices contain the highest aromatic hydrocarbon content at 34.97 %. In summary, the optimized combination of CP and MPVD can enhance the drying efficiency of jujube slices, increase the flavonoid content in jujube slices, and improve their quality characteristics.</div></div>","PeriodicalId":442,"journal":{"name":"Ultrasonics Sonochemistry","volume":"115 ","pages":"Article 107305"},"PeriodicalIF":8.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-frequency ultrasound induced the preparation of oxidized low density lipoprotein 高频超声诱导制备氧化低密度脂蛋白

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-05 DOI: 10.1016/j.ultsonch.2025.107303

Yuanmin Li , Wanyue Yang , Xinyi Zhang , Jingjing Ba , Han Yang , Wen Wang , Ke Zhang , Ze Yang , Hui Liang , Zihan Li , Muthupandian Ashokkumar , Jiguo Zhang , Zhiliang Gao , Yang Yu

Foam cells have been frequently used in studies related to atherosclerosis. Traditional methods for inducing oxidized low-density lipoprotein (oxLDL) involve copper ion (Cu²⁺) treatment, which has inherent limitations such as prolonged oxidation times and residual copper ions. This study explored high-frequency ultrasound (400 kHz) as an alternative method for LDL oxidization. The findings demonstrated that high-frequency ultrasound-oxidized LDL (U-oxLDL) exhibited no significant differences compared to copper-oxidized LDL (Cu-oxLDL) in terms of electrophoretic mobility, foam cell morphology, lipid content, and cholesterol transport proteins. Additionally, lipidomic analysis revealed that U-oxLDL was more comparable to native LDL (N-LDL). Transcriptomic profiling of bone marrow-derived macrophages (BMDMs) treated with oxLDL showed that the gene expression patterns of BMDM foam cells treated with U-oxLDL were over 90 % consistent with those treated with Cu-oxLDL. Therefore, high-frequency ultrasound oxidation method represents a green and efficient strategy for oxLDL preparation, offering potential advantages for advancing atherosclerosis research.

{"title":"High-frequency ultrasound induced the preparation of oxidized low density lipoprotein","authors":"Yuanmin Li , Wanyue Yang , Xinyi Zhang , Jingjing Ba , Han Yang , Wen Wang , Ke Zhang , Ze Yang , Hui Liang , Zihan Li , Muthupandian Ashokkumar , Jiguo Zhang , Zhiliang Gao , Yang Yu","doi":"10.1016/j.ultsonch.2025.107303","DOIUrl":"10.1016/j.ultsonch.2025.107303","url":null,"abstract":"<div><div>Foam cells have been frequently used in studies related to atherosclerosis. Traditional methods for inducing oxidized low-density lipoprotein (oxLDL) involve copper ion (Cu<sup>2+</sup>) treatment, which has inherent limitations such as prolonged oxidation times and residual copper ions. This study explored high-frequency ultrasound (400 kHz) as an alternative method for LDL oxidization. The findings demonstrated that high-frequency ultrasound-oxidized LDL (U-oxLDL) exhibited no significant differences compared to copper-oxidized LDL (Cu-oxLDL) in terms of electrophoretic mobility, foam cell morphology, lipid content, and cholesterol transport proteins. Additionally, lipidomic analysis revealed that U-oxLDL was more comparable to native LDL (N-LDL). Transcriptomic profiling of bone marrow-derived macrophages (BMDMs) treated with oxLDL showed that the gene expression patterns of BMDM foam cells treated with U-oxLDL were over 90 % consistent with those treated with Cu-oxLDL. Therefore, high-frequency ultrasound oxidation method represents a green and efficient strategy for oxLDL preparation, offering potential advantages for advancing atherosclerosis research.</div></div>","PeriodicalId":442,"journal":{"name":"Ultrasonics Sonochemistry","volume":"115 ","pages":"Article 107303"},"PeriodicalIF":8.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143570497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable extraction of phytochemicals from Mentha arvensis using supramolecular eutectic solvent via microwave Irradiation: Unveiling insights with CatBoost-Driven feature analysis

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-04 DOI: 10.1016/j.ultsonch.2025.107300

Zubera Naseem , Muhammad Bilal Qadir , Abdulaziz Bentalib , Zubair Khaliq , Muhammad Zahid , Fayyaz Ahmad , Nimra Nadeem , Anum Javaid

The present study revealed the higher extraction potential of sustainable choline chloride (ChCl) and ethylene glycol (EG) based deep eutectic solvent (DES) from Mentha arvensis via microwave irradiation. The categorical boosting (CatBoost) machine learning model was applied to optimize the extraction process against time (4–8 min), microwave power (160–320 W), and biomass quantity (1–2.0 g/10 mL) with DES. The experimentally optimized TPC 124 ± 4.0 mg GAE/g, TFC 79 ± 3.0 mg QE/g, and DPPH radical inhibition 90 ± 4.0 % evaluated in 6 min at 240 W with 1.0 g biomass. The lowest average relative errors of 0.402 % (TPC), 0.863 % (TFC), and 0.597 % (DPPH) for train and 0.679 % (TPC), 0.685 % (TFC) and 0.480 % (DPPH) for test data showed the consistency with the predicted values. The partial dependence and feature importance revealed the contributing impact of parameters for optimizing the extraction. The average contribution percentage of each predictor to the responses revealed that time contributed 32.5 % (TPC), 35.9 % (TFC), and 18.6 % (DPPH); microwave power contributed 26.7 % (TPC), 25.5 % (TFC), and 44.2 % (DPPH); while biomass contributed 40.8 % (TPC), 38.6 % (TFC), and 37.2 % (DPPH). The significant antibacterial (S. aureus = 25.5 ± 1.4 mm and E. coli = 23.5 ± 1.4 mm) with MICs (S. aureus = 50 ± 2.5 µg/mL and E. coli = 100 ± 1.5 µg/mL) and antifungal potential (F. solani = 22.5 ± 1.4 mm, A. niger = 23.5 ± 0.8 mm), with MIC (F. solani = 100 ± 0.4 µg/mL and A. niger = 50 ± 0.5 µg/mL) of optimized extracts recorded by DES. The DES would be the best alternative to traditional organic solvents based on higher extraction efficiency and sustainability.

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引用次数: 0

Ultrasound-assisted preparation of shikonin-loaded emulsions for the treatment of bacterial infections

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-04 DOI: 10.1016/j.ultsonch.2025.107302

Xiaomiao Cui , Zhiliang Gao , Xinxin Han , Qun Yu , Vitoria H. Cauduro , Erico M.M. Flores , Muthupandian Ashokkumar , Xiaoyong Qiu , Jiwei Cui

Bacteria can encapsulate themselves in a self-generated matrix of hydrated extracellular polymeric substances such as polysaccharides, proteins, and nucleic acids, thereby forming bacterial biofilm infections. These biofilms are drug resistant and will diminish the efficacy of antimicrobial agents, rendering treatment of such infections challenging. Herein, an innovative strategy is proposed to synergistically degrade bacterial biofilms and eradicate the entrapped bacteria through integrating α-amylase (α-Amy), shikonin (SK) and epigallocatechin gallate (EGCG) within an emulsion. The natural protein α-Amy is deployed to enzymatically hydrolyze the polysaccharide of biofilms. Due to the amphipilic properties of α-Amy and the cross-linking capability of EGCG, the formed α-Amy/SK@EGCG emulsion possess high stability. SK was encapsulated within the emulsion through ultrasound-assisted assembly, targeting to treat bacterial infection after biofilm degradation. In vitro and in vivo experiments demonstrate that the polyphenol-protein stabilized emulsion loaded with antibacterial SK achieves profound penetration into the biofilms due to the extracellular polysaccharide hydrolysis mediated by α-Amy. As a result, the α-Amy/SK@EGCG emulsion can significantly alleviate inflammation symptoms and accelerate the healing process of biofilm-infected wounds. This study provides a promising therapeutic strategy for the development of novel materials aimed for the enhanced treatment of bacterial biofilm infections.

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引用次数: 0

Enhancing starch properties through dual modification: Ultrasonication and acetic acid treatment of non-conventional starches

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-04 DOI: 10.1016/j.ultsonch.2025.107301

Likhitha Yadav Prakruthi , Hari Krishnan , Tamma Medha , K. Kumarakuru , P. Vasantha Kumari , Challa Surekha , Hemasundar Alavilli , Deepika Kaushik , Abeer Hashem , Nouf H. Alotaibi , Graciela Dolores Avila-Quezada , Elsayed Fathi Abd_Allah , Mukul Kumar , Chagam Koteswara Reddy

This study investigated the effects of ultrasonication (US) and acetic acid treatments on starches extracted from non-conventional sources: elephant foot yam (NES), cassava (NCS) and sweet potato (NSP). The starches underwent ultrasonication at 40°C for 3, 9, and 15 min, followed by acetylation, with native starches used as control. The morphological, physicochemical, and functional properties were comprehensively analyzed. Results revealed that increased treatment time significantly (p<0.05) affected the starches functional properties, morphology and crystallinity. Amylose content was highest in NES (22.85 %), followed by NSP (21.05 %) and NCS (19.28 %). Following dual modification, a significant reduction in amylose content was observed in ultrasonic-assisted acetylated starches. Morphological analysis revealed granular aggregation, surface changes, and the formation of pores and cracks. X-ray diffraction (XRD) patterns demonstrated that NSP and NES starches exhibited major peaks characteristic of C-type starches, while NCS starches displayed an A-type pattern. Following ultrasound-assisted acetylation, the crystalline structures of all starches remained largely unchanged, although relative crystallinity slightly decreased compared to native starches. The oil absorption capacity and tap density of NES increased with dual modification, suggesting enhanced hydrophobicity. These findings highlight the potential of dual modification to improve starch properties for industrial applications, including confectionery, edible films, tablet binders, and encapsulation.

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引用次数: 0

Position control of an acoustic cavitation bubble by reinforcement learning

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2025-03-03 DOI: 10.1016/j.ultsonch.2025.107290

Kálmán Klapcsik , Bálint Gyires-Tóth , Juan Manuel Rosselló , Ferenc Hegedűs

Reinforcement Learning (RL) is employed to develop control techniques for manipulating acoustic cavitation bubbles. This paper presents a proof of concept in which an RL agent is trained to discover a policy that allows precise control of bubble positions within a dual-frequency standing acoustic wave field by adjusting the pressure amplitude values. The agent is rewarded for driving the bubble to a target position in the shortest possible time. The results demonstrate that the agent exploits the nonlinear behaviour of the bubble and, in specific cases, identifies solutions that cannot be addressed using the linear theory of the primary Bjerknes force. The RL agent performs well under domain randomization, indicating that the RL approach generalizes effectively and produces models robust against noise, which could arise in real-world applications.

引用次数: 0

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