Ultrasonics Sonochemistry最新文献_第8页

Structural characterization, antioxidant activity, and fermentation characteristics of Flammulina velutipes residue polysaccharide degraded by ultrasonic assisted H2O2-Vc technique 用超声波辅助 H2O2-Vc 技术降解的绒毛虫残渣多糖的结构特征、抗氧化活性和发酵特性。

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-26 DOI: 10.1016/j.ultsonch.2024.107085

Yunxiang Que, Yao Zhang, Fengxiang Liang, Liping Wang, Yiting Yang, Jingbo Zhang, Wanting Wang, Ying Sun, Changjiao Zhong, Haipeng Zhang, Chengguang He, Lili Guan, Hongxia Ma

Adhere to the concept of low-carbon environmental protection and turning waste into treasure, polysaccharides from Flammulina velutipes residue polysaccharide (FVRP) has been developed and possesses diverse bioactivities, comprising antioxidant, hypoglycemic, and relieving heavy metal damage, which still has the disadvantages of high molecular weight and low bioavailability. The current work is the first to prepare a degraded polysaccharide (FVRPV) from FVRP by ultrasonic assisted H₂O₂-Vc technique in order to reduce its molecular weight, thereby improving its activity and bioavailability. Our results found that the molecular weight and average particle size were declined, but the monosaccharide composition and characteristic functional group types of FVRPV had no impact. The structural changes of polysaccharides analyzed by XRD, Congo Red test, I₂-KI, SEM, and methylation analysis indicated that the surface morphology and glycosidic bond composition of FVRPV possessed longer side chains and a greater number of branches with an amorphous crystal structure devoid of a triple helix configuration, and had experienced notable alterations after ultrasonic assisted H₂O₂-Vc treatment. Meanwhile, the in vitro antioxidant capacity of FVRPV had significantly increased compared to FVRP, implying ultrasonic assisted H₂O₂-Vc technique maybe a effective method to enhance the bioactivity of polysaccharides. In addition, the content of polysaccharide, reducing sugar, and uronic acid in FVRPV was significantly decreased, but antioxidant capacity of fermentation broth was stronger by in vitro human fecal fermentation. The 16S rDNA sequencing data displayed that FVRPV can enrich probiotics and reduce the abundance of pathogenic bacteria through different metabolic pathways mediated by gut microbiota, thereby exerting its potential probiotic effects. The interesting work provides a novel degraded polysaccharide by ultrasonic assisted H₂O₂-Vc technique, laying a foundation for developing FVRPV as a new antioxidant and prebiotic.

秉承低碳环保、变废为宝的理念，从绒毛虫残体多糖（FVRP）中开发出了具有抗氧化、降血糖、缓解重金属损伤等多种生物活性的多糖，但仍存在分子量高、生物利用度低等缺点。本研究首次采用超声波辅助 H2O2-Vc 技术从 FVRP 中制备降解多糖（FVRPV），以降低其分子量，从而提高其活性和生物利用度。我们的研究结果发现，FVRPV 的分子量和平均粒径均有所下降，但其单糖组成和特征官能团类型没有受到影响。通过 XRD、刚果红试验、I2-KI、扫描电镜和甲基化分析等方法对多糖的结构变化进行了分析，结果表明 FVRPV 的表面形态和糖苷键组成具有较长的侧链和较多的分支，晶体结构为无定形，无三重螺旋构型，经超声波辅助 H2O2-Vc 处理后发生了明显的变化。同时，与 FVRP 相比，FVRPV 的体外抗氧化能力明显提高，这表明超声辅助 H2O2-Vc 技术可能是提高多糖生物活性的有效方法。此外，FVRPV 中的多糖、还原糖和尿酸含量明显降低，但体外人粪便发酵液的抗氧化能力更强。16S rDNA 测序数据显示，FVRPV 可通过肠道微生物群介导的不同代谢途径富集益生菌并降低病原菌的丰度，从而发挥其潜在的益生作用。这项有趣的工作通过超声波辅助 H2O2-Vc 技术提供了一种新型降解多糖，为开发 FVRPV 作为新型抗氧化剂和益生元奠定了基础。

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引用次数: 0

Ultrasound-assisted extraction of polyphenols from Phyllanthi Fructus: Comprehensive insights from extraction optimization and antioxidant activity 超声波辅助萃取叶黄素中的多酚：从萃取优化和抗氧化活性中获得全面启示

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-25 DOI: 10.1016/j.ultsonch.2024.107083

Haixia Che , Rui Zhang , Xianyao Wang , Hong Yu , Xuepeng Shi , Jie Yi , Jiawen Li , Qi Qi , Ruizhi Dong , Qian Li

Phyllanthi Fructus (PF) is a valuable botanical resource with a long history of traditional use, known for potent antioxidant and anti-inflammatory effects attributed to its rich contents of bioactive compounds, particularly polyphenols. However, current extraction techniques limit the utilization of polyphenols from PF. This study aimed to achieve the maximum polyphenol yield and improve the antioxidant activity of PF extracts to promise PF’s prospects for modern healthcare.

Firstly, ultrasonic-assisted extraction (UAE) was employed to extract the polyphenols in PF and a combination of Plackett-Burman designs (PBD) and response surface methodology (RSM) was applied to optimize UAE’s conditions. Next, cellular superoxide dismutase (SOD) and malondialdehyde (MDA) were used to assess the antioxidant activity of extracted polyphenols. Ultra-Performance Liquid Chromatography coupled with Quadrupole Time-of-Flight Mass Spectrometry (UPLC-Q-TOF MS) was utilized to characterize polyphenol components in the PF extracts. Finally, network pharmacology and molecular docking analysis were performed to screen the potential target proteins of polyphenols from PF.

As a result, the optimized polyphenol yield was 213.49 mg/g, and the antioxidant activities, measured by ability of DPPH scavenging, ABTS+ scavenging, and FRAP were 76.95 %, 2.24 mmol/g, 2.34 mmol/g, respectively. PF extracts also showed good antioxidant capabilities at cellular level. 26 polyphenol components were identified in the PF extracts. Among these, ellagic acid, myricetin, and eriodictyol may exert antioxidant effects by interacting with AKT serine/threonine kinase 1 (AKT1).

In conclusion, our study provides valuable insights into the optimizing PF extraction and underscores its potential applications in enhancing natural polyphenols extraction using UAE with a combination of PBD and RSM. These findings offer a promising avenue for the development and utilization of PF, and could serve as a reference for similar extraction processes in the future.

叶下珠（Phyllanthi Fructus，PF）是一种宝贵的植物资源，具有悠久的传统使用历史，因其富含生物活性化合物（尤其是多酚）而具有强大的抗氧化和消炎作用。然而，目前的提取技术限制了对 PF 中多酚的利用。首先，采用超声波辅助萃取（UAE）来提取 PF 中的多酚，并结合普拉克特-伯曼设计（PBD）和响应面方法（RSM）来优化 UAE 的条件。然后，使用细胞超氧化物歧化酶（SOD）和丙二醛（MDA）来评估提取多酚的抗氧化活性。超高效液相色谱-四极杆飞行时间质谱法（UPLC-Q-TOF MS）用于鉴定 PF 提取物中的多酚成分。结果表明，优化后的多酚产量为 213.49 mg/g，DPPH 清除能力、ABTS+ 清除能力和 FRAP 抗氧化活性分别为 76.95 %、2.24 mmol/g、2.34 mmol/g。PF 提取物在细胞水平上也表现出良好的抗氧化能力。在 PF 提取物中发现了 26 种多酚成分。总之，我们的研究为优化 PF 提取提供了有价值的见解，并强调了其在使用结合 PBD 和 RSM 的 UAE 提高天然多酚提取方面的潜在应用。这些研究结果为开发和利用 PF 提供了一条前景广阔的途径，并可作为未来类似提取工艺的参考。

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引用次数: 0

Rapid and efficient high-performance liquid chromatography-ultraviolet determination of total amino acids in protein isolates by ultrasound-assisted acid hydrolysis 利用超声辅助酸水解法快速高效地测定蛋白质分离物中的总氨基酸的高效液相色谱-紫外光谱法

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-25 DOI: 10.1016/j.ultsonch.2024.107082

Jorge A. Custodio-Mendoza, Patryk Pokorski, Havva Aktaş, Marcin A. Kurek

This study presents the optimization and validation of an ultrasound-assisted acid method for the HPLC-UV determination of amino acids in plant-based proteins. The research focuses on enhancing hydrolysis efficiency and reducing environmental impact. Ultrasound treatment significantly accelerated hydrolysis by creating cavitation, which increases local pressure and temperature, leading to faster reaction rates. The optimal condition was a 30-minute treatment at 90 °C with 6 M hydrochloric acid. The 9-fluorenylmethyloxycarbonyl chloride derivatization was best performed at pH 9.0 using borate buffer, ethanol as the organic solvent, and a 5-minute derivatization time with a 5 mM concentration. The method’s analytical performance, validated according to FDA guidelines, showed excellent selectivity, specificity, linearity (r² > 0.999), accuracy (recovery between 80–118 %), and precision (RSD<10.9). The analysis of 15 plant-based proteins revealed distinct amino acid profiles. Compared to traditional acid hydrolysis methods, the ultrasound-assisted approach demonstrated no significant difference in results (p-value > 0.05), confirming its reliability. The optimized ultrasound-assisted method is a reliable and efficient alternative for amino acid analysis, offering significant cost and time savings while maintaining high analytical performance. These findings are crucial for nutritional planning and developing functional foods to improve health outcomes.

本研究介绍了一种超声辅助酸方法的优化和验证，该方法用于高效液相色谱-紫外检测植物性蛋白质中的氨基酸。研究的重点是提高水解效率和减少对环境的影响。超声波处理可产生空化作用，提高局部压力和温度，从而加快反应速度，从而大大加速水解过程。最佳条件是在 90 °C 下用 6 M 盐酸进行 30 分钟的处理。9-芴甲基氧羰酰氯衍生的最佳条件是 pH 值为 9.0，使用硼酸盐缓冲液，以乙醇为有机溶剂，衍生时间为 5 分钟，衍生浓度为 5 毫摩尔。该方法的选择性、特异性、线性（r2 >0.999）、准确度（回收率在 80-118 % 之间）和精密度（RSD <10.9）均表现出色，其分析性能经美国食品及药物管理局（FDA）指南验证。对 15 种植物性蛋白质的分析显示了不同的氨基酸谱。与传统的酸水解方法相比，超声辅助方法的结果无显著差异（p 值为 0.05），证实了其可靠性。优化后的超声辅助方法是一种可靠、高效的氨基酸分析替代方法，在保持高分析性能的同时，还能显著节约成本和时间。这些发现对于营养规划和开发功能食品以改善健康状况至关重要。

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引用次数: 0

Ultrasound combined with FeSO4 facilitated the occurrence of ferroptosis in Vibrio parahaemolyticus 超声波与硫酸亚铁结合有助于副溶血性弧菌发生铁变态反应

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-23 DOI: 10.1016/j.ultsonch.2024.107080

Shurui Peng , Lishan Yao , Xiaolin Zhu, Wei Ge, Jiakun Deng, Hongbo Li, Dan Xu, Liangbin Hu, Haizhen Mo

Ultrasound (US) as a sustainable non-thermal sterilization technology that is employed either independently alone or in combination with other processing methods to eliminate food-borne pathogens in the food industry. In the present study, the synergistic effects of US combined with FeSO₄ against Vibrio parahaemolyticus were investigated. The results demonstrated that the combination of ultrasound and FeSO₄ had an excellent bactericidal activity on V. parahaemolyticus. Treatment with US (100 W) and FeSO₄ (8 μM) for 15 min could kill more than 99.9 % cells. Furthermore, the observed cell death was identified as classical ferroptosis, characterized by ferroptosis hallmarks including iron-dependent, ROS burst, membrane damage and lipid peroxide accumulation. Addition of ferroptosis inhibitor liproxstatin-1 alleviated the cell death induced by the combination treatment. Transcriptome analysis further revealed that the US-FeSO₄ treatment significantly influenced pathways related to fatty acid metabolism, ferroptosis, biofilm formation, RNA degradation, oxidative phosphorylation and other key processes, which likely contributed to the occurrence of ferroptosis. Based on these findings, we speculated that cavitation effect of US promoted the entry of Fe²⁺, leading to the generation of free radicals primarily responsible for ferroptosis by US-FeSO₄. Taken together, this study provides valuable insights into the biological pathway involved in ultrasound sterilization and presents an alternative strategy to eradicate microorganism in food products.

超声波（US）是一种可持续的非热灭菌技术，可单独使用或与其他加工方法结合使用，以消除食品工业中的食源性致病菌。本研究调查了 US 与 FeSO4 结合使用对副溶血性弧菌的协同作用。结果表明，超声波和硫酸亚铁的组合对副溶血性弧菌具有极佳的杀菌活性。使用 US（100 W）和 FeSO4（8 μM）处理 15 分钟可杀死 99.9% 以上的细胞。此外，观察到的细胞死亡被确定为典型的铁变态反应，其特征是铁变态反应的标志，包括铁依赖性、ROS爆发、膜损伤和过氧化脂质积累。加入铁突变抑制剂 liproxstatin-1 可减轻联合治疗诱导的细胞死亡。转录组分析进一步显示，US-FeSO4 处理显著影响了脂肪酸代谢、铁变态反应、生物膜形成、RNA 降解、氧化磷酸化和其他关键过程的相关通路，这可能是铁变态反应发生的原因之一。基于这些发现，我们推测 US 的空化效应促进了 Fe2+ 的进入，导致自由基的产生，而自由基是 US-FeSO4 导致铁变态反应的主要原因。综上所述，本研究为了解超声杀菌的生物途径提供了宝贵的见解，并为消灭食品中的微生物提供了另一种策略。

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引用次数: 0

Ultrasound-assisted extraction, optimization, and purification of total flavonoids from Daphnegenkwa and analysis of their antioxidant, anti-inflammatory, and analgesic activities 超声辅助提取、优化和纯化[式略]中的总黄酮类化合物，并分析其抗氧化、抗炎和镇痛活性

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-23 DOI: 10.1016/j.ultsonch.2024.107079

Yi Xiang , Zheng Liu , Yanzhi Liu , Bin Dong , Changqing Yang , Hanhan Li

Daphne genkwa (D. genkwa) is the dried flower buds of a Chinese medicinal plant with multiple biological activities. Response surface methodology (RSM) combined with artificial neural network (ANN) techniques were utilized to optimize ultrasound-assisted extraction conditions for D. genkwa. Antioxidant activity and anti-inflammatory and analgesic properties of total flavonoids from D. genkwa (TFDG) were assessed. Optimal conditions involving ultrasonic power of 225 W, 30 min extraction time, 30 mL/g liquid–solid ratio, 60 °C extraction temperature, and 70% ethanol concentration yielded a maximum total flavonoids content (TFC) of 5.41 mg/g. After microporous resin purification, four specific flavonoids in D. genkwa were identified and quantified using high-performance liquid chromatography (HPLC). The TFDG demonstrated potent antioxidant activity, with a 94% rate of scavenging the 2, 2-diphenyl-1-picrylhydrazyl (DPPH). Furthermore, TFDG exhibited pain-alleviating properties in hot plate and acetic acid-induced writhing tests and noteworthy inhibitory effects on xylene-induced ear swelling in mice. The total flavonoids extracted by ultrasound had excellent biological activity. This establishes a foundation for further investigation into the potential medical value of D. genkwa.

玄参（Daphne genkwa）是一种具有多种生物活性的中药植物的干燥花蕾。研究人员利用响应面方法学（RSM）结合人工神经网络（ANN）技术对玄参的超声辅助提取条件进行了优化。评估了玄参总黄酮（TFDG）的抗氧化活性、抗炎和镇痛特性。在超声波功率为 225 W、萃取时间为 30 分钟、液固比为 30 mL/g、萃取温度为 60 °C、乙醇浓度为 70% 的最佳条件下，总黄酮含量（TFC）最高可达 5.41 mg/g。经微孔树脂纯化后，采用高效液相色谱法（HPLC）鉴定和定量了 D. genkwa 中的四种特定黄酮类化合物。TFDG 具有很强的抗氧化活性，对 2，2-二苯基-1-苦基肼（DPPH）的清除率高达 94%。此外，TFDG 在热板和醋酸诱导的蠕动试验中表现出镇痛特性，对二甲苯诱导的小鼠耳肿胀也有显著的抑制作用。用超声波提取的总黄酮具有很好的生物活性。这为进一步研究玄参的潜在医疗价值奠定了基础。

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引用次数: 0

The impact of inorganic salts on the ultrasonic degradation of contaminants: A review 无机盐对污染物超声降解的影响：综述。

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-20 DOI: 10.1016/j.ultsonch.2024.107076

Haleigh A. Fernandez, Linda K. Weavers

This comprehensive review explores the interplay between inorganic salts and ultrasound-assisted degradation of various contaminants. The addition of salt to aqueous matrices has been attributed to increasing contaminant degradation via the salting-out effect. However, research investigating the impact of salt on degradation has yielded inconsistent results. This review incorporated degradation information from 44 studies organizing data according to compound class and ionic strength to analyze the impact of inorganic salts on cavitation bubble dynamics, contaminant behavior, radical species generation, and contaminant degradation. Frequency and salt type were assessed for potential roles in contaminant degradation. The analysis showed that high intensity ultrasound was most beneficial to degradation in salt solutions. Unexpectedly, hydrophilic compounds showed marked enhancement with increasing ionic strength while many hydrophobic compounds did not benefit as greatly. Based on the collected data and analysis, enhanced degradation in the presence of salt appears to be primarily radical-mediated rather than due to the salting-out effect. Finally, the analysis provides guidance for designing sonolytic reactors for contaminant degradation.

本综述探讨了无机盐与超声波辅助降解各种污染物之间的相互作用。在水性基质中添加盐可通过盐析效应增加污染物降解。不过，有关盐对降解影响的研究结果并不一致。本综述纳入了 44 项研究的降解信息，根据化合物类别和离子强度整理数据，分析无机盐对空化气泡动力学、污染物行为、自由基物种生成和污染物降解的影响。评估了频率和盐类在污染物降解中的潜在作用。分析表明，高强度超声波最有利于盐溶液中的降解。出乎意料的是，随着离子强度的增加，亲水性化合物的降解效果明显增强，而许多疏水性化合物的降解效果并不明显。根据收集的数据和分析，盐存在时降解的增强似乎主要是由自由基介导的，而不是由于盐析效应。最后，该分析为设计用于污染物降解的声解反应器提供了指导。

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引用次数: 0

Focused shock waves and inertial cavitation release tumor-associated antigens from renal cell carcinoma 聚焦冲击波和惯性空化释放肾细胞癌的肿瘤相关抗原

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-20 DOI: 10.1016/j.ultsonch.2024.107078

Nushin Hosano , Zahra Moosavi-Nejad , Takuichiro Hide , Hamid Hosano

Tumor biomarkers play an essential role in immunotherapeutic strategies in cancer treatment, contributing to early diagnosis, patient selection, treatment monitoring, and personalized treatment plans. Despite their importance in cancer care, circulating biomarkers may not always be detectable or sufficiently elevated to provide reliable test results. Due to the pressing need for innovative approaches to enhance biomarker levels, this study explored the potential use of focused shock waves and cavitation for non-invasively releasing tumor-associated antigens. Renal carcinoma cell lines ACHN and TOS-1 were used in an in vitro study to analyze the impact of shock waves on two membrane glycosphingolipid antigens, MSGG and G1, respectively. Focused shock waves were generated using a partial spherical piezoceramic dish. Flow-cytometric analysis of treated cells immediately after 1,000 focused shock waves at 16 MPa overpressure showed a 29.4 % and 17.6 % decrease in MSGG and G1 antigens on the cell surfaces. In the immunostaining of glycosphingolipid fractions on thin-layer chromatography (TLC), both tumor markers were reduced by an average of 49.30 % (MSGG) and 57.08 % (G1). Immunoelectron microscopy images confirmed decrease in the cell membrane intensity immediately after shock waves because of the release of antigens into the extracellular spaces. The released antigens were primarily found on cell debris formed by shock waves and cavitation induced damage to the cell membrane. Theoretical analyses were performed to understand antigen release mechanisms. Moreover, the biophysical events that occurred following the interaction of a shock wave with a suspended cell were modeled and clarified. A novel model was used to calculate the tensile stresses following shock waves and to explain the deformations observed in scanning electron microscopy images. The release of tumor antigens by focused shock waves and inertial cavitation represents exciting prospects for advancing cancer care strategies.

肿瘤生物标志物在癌症治疗的免疫治疗策略中发挥着至关重要的作用，有助于早期诊断、患者选择、治疗监测和个性化治疗计划。尽管循环生物标志物在癌症治疗中非常重要，但它们并不总能被检测到或升高到足以提供可靠的检测结果。由于迫切需要创新方法来提高生物标志物水平，本研究探索了利用聚焦冲击波和空化技术非侵入性释放肿瘤相关抗原的可能性。体外研究使用肾癌细胞系 ACHN 和 TOS-1，分别分析冲击波对两种膜糖磷脂抗原 MSGG 和 G1 的影响。聚焦冲击波是利用部分球形压电陶瓷盘产生的。在 16 兆帕超压下产生 1000 次聚焦冲击波后，立即对处理过的细胞进行流式计量分析，结果显示细胞表面的 MSGG 和 G1 抗原分别减少了 29.4% 和 17.6%。在薄层色谱（TLC）上对糖磷脂馏分进行免疫染色时，这两种肿瘤标志物平均减少了 49.30 %（MSGG）和 57.08 %（G1）。免疫电镜图像证实，由于抗原释放到细胞外空间，冲击波后细胞膜强度立即下降。释放的抗原主要存在于由冲击波和空化引起的细胞膜损伤所形成的细胞碎片上。为了解抗原释放机制，进行了理论分析。此外，还模拟并阐明了冲击波与悬浮细胞相互作用后发生的生物物理事件。一个新颖的模型被用来计算冲击波后的拉伸应力，并解释扫描电子显微镜图像中观察到的变形。聚焦冲击波和惯性空化释放肿瘤抗原，为推进癌症治疗策略带来了令人兴奋的前景。

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引用次数: 0

Study on the formation and characteristics of unstable sheet cavitation on hydrofoils 水翼上不稳定片状气蚀的形成和特征研究

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-19 DOI: 10.1016/j.ultsonch.2024.107074

Lin Wang , Di Chen , Fangping Tang , Haiyu Liu

Hydrofoils, as fundamental components of hydraulic machinery, directly influence the performance of such machinery. This study conducted an analysis of the cavitation characteristics of hydrofoils at a + 4° angle of attack under various cavitation numbers using numerical simulation and experimental research methods. The focus of the research was to explore the phenomenon of unstable sheet cavitation and its causes, as well as to reveal the characteristics of the re-entrant jet. The large eddy simulation method was employed to calculate the cavitation morphology under three different cavitation numbers. The method is highly consistent with the experimental results in simulating the small-scale detachment at the tail of unstable sheet cavitation and the large-scale shedding of cloud cavitation. The study found that the detachment of unstable sheet cavitation is closely related to the re-entrant jet, which exhibits transient and abrupt characteristics during the unstable sheet cavitation phase. Furthermore, by applying FFT processing to the distribution of maximum reverse velocity and the spatiotemporal changes of Ux on characteristic lines, eigenfrequency of the detachment of unstable sheet cavitation were identified. The research results indicate that cavitation mainly show as sheet cavitation when the cavitation closure point does not exceed the zero-slope point. Beyond this point, it transitions to cloud cavitation. This study provides new insights into the cavitation phenomenon of hydrofoils and offers quantitative research on the phenomenon of unstable sheet cavitation.

水翼作为液压机械的基本部件，直接影响着液压机械的性能。本研究采用数值模拟和实验研究方法，分析了水翼在 + 4° 攻角条件下不同空化数下的空化特性。研究的重点是探索不稳定片气蚀现象及其原因，并揭示再入射流的特征。采用大涡模拟方法计算了三种不同空化数下的空化形态。该方法在模拟不稳定片空化尾部的小尺度脱离和云空化的大尺度脱落方面与实验结果高度一致。研究发现，不稳定片空化的脱落与再入射流密切相关，后者在不稳定片空化阶段表现出瞬态和突变的特征。此外，通过对最大反向速度的分布和 Ux 在特征线上的时空变化进行 FFT 处理，确定了不稳定片空化脱离的特征频率。研究结果表明，当空化闭合点不超过零斜点时，空化主要表现为片状空化。超过这个点，就会过渡到云空化。这项研究为水翼的空化现象提供了新的见解，并对不稳定片状空化现象进行了定量研究。

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引用次数: 0

Compressible effect on the mutual interaction of two cavitation bubbles in radial oscillations and translational motion 两个空化气泡在径向振荡和平移运动中相互影响的可压缩效应

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-18 DOI: 10.1016/j.ultsonch.2024.107075

Hancheng Wang, Junjie Jiao, Xuchao Pan, Yanjie Qi, Feng Shan, Zhong Fang, Chuanting Wang, Yong He

In this study, we considered the compressible effect on the mutual interaction of two cavitation bubbles by correcting the sound field emitted by one bubble in the radial equations of the other bubble to first order in the Mach number of the flow, and the effect is represented by the incident wave acting on bubbles. The results illustrates that the incident wave can enhance the resonance response at the redistributed resonance frequency, which leads to an increase in radial acceleration and the secondary Bjerknes force, and rapid approach of bubbles. Furthermore, the influence of incident wave on the interaction of bubbles driven at lower frequencies is more significant, due to resonance enhancement caused by the proximity of natural frequencies and frequency multiplications of the external sound field. Our findings reveal that the compressible effect is not only critical to interaction in radial oscillations, but also in translational motion.

在这项研究中，我们考虑了两个空化气泡相互影响的可压缩效应，方法是将一个气泡发出的声场在另一个气泡的径向方程中修正为流动马赫数的一阶，并用作用于气泡的入射波来表示这种效应。结果表明，入射波能增强再分布共振频率下的共振响应，从而导致径向加速度和次生比氏力的增加，气泡迅速接近。此外，入射波对低频驱动气泡相互作用的影响更为显著，这是由于固有频率接近和外部声场的频率倍增导致共振增强。我们的研究结果表明，可压缩效应不仅对径向振荡中的相互作用至关重要，而且对平移运动也至关重要。

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引用次数: 0

Sustainable ultrasonic extraction of antibacterial Basella alba fruit dye for cotton, silk, and leather 棉花、丝绸和皮革用抗菌白苏果染料的可持续超声波提取

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry

Pub Date : 2024-09-15 DOI: 10.1016/j.ultsonch.2024.107069

Loganathan Lingeshwaran , Jagadeesh Kumar Alagarasan , Seema siddharthan , Kanagasabapathy Sivasubramanian , Palanivel Velmurugan , Fatimah Oleyan Al-Otibi , Sivakumar Manickam , Moonyong Lee

Alternative to synthetic dyes containing harmful compounds, dyes derived from natural sources are gaining popularity due to their safer and eco-friendly nature. This study focuses on extracting red dye from Basella alba fruit and optimising the extraction methods, including ultrasonic bath, ultrasonic probe, and direct heating. The extracted dye was then used for dyeing cotton, silk, and leather without needing a mordant. Furthermore, the antibacterial properties of the extracted red dye were evaluated against skin bacteria. The UV–Visible spectrophotometric analysis revealed that the maximum red colour in the methanol extract (λ_max 270 and λ_max 542 nm) was achieved at 60 °C for 30 min using the ultrasonic water bath extraction method, followed by the ultrasonic probe and direct heating methods. The FTIR spectra confirmed the presence of flavonoids, betacyanin, and gomphrenin-I in the extracted dye. The ultrasonic dyeing process at 50 °C yielded a K/s value 6.3 for the dyed cotton, silk, and leather without using a mordant. Additionally, the fatness test indicated a high grade of 0.5–1.5 for the ultrasonic dyeing method compared to other dyeing techniques. The extracted dye exhibited significant antibacterial activity against all Pseudomonas sp. after extraction in methanol, with the highest inhibition observed against Pseudomonas sp. with a MIC of 1.56 mg/ml.

作为含有害化合物的合成染料的替代品，从天然资源中提取的染料因其更安全、更环保的特性而越来越受欢迎。本研究的重点是从巴沙拉果实中提取红色染料，并优化提取方法，包括超声波浴、超声波探头和直接加热。提取的染料可用于棉花、丝绸和皮革染色，无需媒染剂。此外，还评估了提取的红色染料对皮肤细菌的抗菌性能。紫外-可见分光光度分析表明，使用超声波水浴萃取法，在 60 °C 条件下 30 分钟，甲醇提取物中的红色达到最大值（λmax 270 和 λmax 542 nm），随后是超声波探针法和直接加热法。傅立叶变换红外光谱证实了提取的染料中含有黄酮类化合物、贝特矢车菊素和甘菊素-I。在不使用媒染剂的情况下，在 50 °C 下进行超声波染色，染色后的棉花、丝绸和皮革的 K/s 值为 6.3。此外，与其他染色技术相比，超声波染色法的匀染度为 0.5-1.5 级。在甲醇中提取后，提取的染料对所有假单胞菌都有明显的抗菌活性，其中对假单胞菌的抑制率最高，MIC 为 1.56 mg/ml。

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