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Acta Metallurgica Sinica(English Letters) 2019年第3期32卷 332-342页

作者： Zhi-Wei Lai Zhe-Yuan Huang Chuan Pan Hui-Qiao Du Xiao-Guang Che Lei Liu Wei-Ming Long Gui-Sheng Zou School of Materials Science and Engineering Tsinghua University Department of Mechanical Engineering Tsinghua University China Iron & Steel Research Institute Group College of Materials Science and Engineering Shanxi Key Laboratory of Advanced Magnesium-Based MaterialsTaiyuan University of Technology Beijing Spacecraft Manufacturing Factory The State Key Laboratory of Advanced Brazing Filler Metals and Technology Zhengzhou Research Institute of Mechanical Engineering

A novel ultrasonic-assisted low-temperature soldering was developed to join AZ31B Mg alloy and 6061 Al alloy with a series of Sn–x Zn solders. The average maximum shear strength of the joints reaches up to 87.5 MPa at soldering temperature of 300 °C under ultrasonic assistance for only 5 s using Sn–20 Zn solder. The fracture path propagates completely in the soldering seam. The results indicate that the microjet generated by ultrasonic pressure in liquid solder could strike and splinter the Mg_2Sn intermetallic compounds into small pieces, which contributes to the enhancement of the joint strength. In addition, the primary Al(Zn) solid solution phase formed during cooling stage could also strengthen the joint due to the prevention of microcracks propagation.

关键词： ultrasonic-assisted soldering ultrasonic effect mechanism Microjet Intermetallic compound distribution Solid solution Joint strengthening

Design,ultrasonic-assisted Synthesis and Evaluation In vitro Antimicrobial Activity of Bis-isoxazole Derivatives Bearing Chloro-pyridinyl Group

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Chemical Research in Chinese Universities 2021年第3期37卷 668-673页

作者： FENG Fan LI Jing ZHANG Zhihui FU Jiaxu ZHANG Yumin GU Qiang College of Chemistry Jilin UniversityChangchun130012P.R.China Drilling and Exploitation Technology for Oil Shale National-Local Joint Engineering Laboratory of In-situ ConversionChangchun130021P.R.China

An ultrasonic-assisted synthesis of bis-isoxazole derivatives was *** 3-(6-chloropyridin-3-yl)-5-{[(3-arylisoxazol-5-yl)methoxy]methyl}isoxazoles were synthesized by 1,3-dipolar cycloaddition reaction between substituted isoxazolyl alkyne compounds and 6-chloro-N-hydroxynicotinimidoyl *** structures of the synthesized compounds were confirmed by HRMS,FTIR,^(1)H and^(13)C NMR ***,the antifungal and antibacterial activities of target compounds were *** synthesized compounds 6a and 6h exhibited better antifungal activity in comparison with the standard drug *** minimum inhibitory concentrations(MICs)of both compound 6a and compound 6h were both 4µg/mL against Candida albicans ATCC 10231.

关键词： ultrasonic-assisted Bis-isoxazole 1,3-Dipolar cycloaddition Antimicrobial activity

Antioxidant and hepatoprotective effects of Ajuga nipponensis extract by ultrasonic-assisted extraction

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Asian Pacific Journal of Tropical Medicine 2016年第5期9卷 409-414页

作者： Chang-Wei Hsieh Wen-Ching Ko Wai-Jane Ho Chao-Kai Chang Guo-Jhou Chen Jen-Chieh Tsai Department of Medicinal Botanicals and Health Applications Da-Yeh University Biotechnology Research Center Da-Yeh University Department of Bioindustry Technology Da-Yeh University

Objective: To investigate suitable condition for extraction of the active components from Ajuga nipponensis(A. nipponensis). Methods: Orthogonal experimental design was used to determine the optimal extraction parameters for ecdysterones and flavonoids. Finally, the hepatoprotective abilities of A. nipponensis extracts were evaluated by CCl_4-induced animal models. Results:Maximum yields of flavonoids(7.87±0.10) mg/g and ecdysterones(0.73±0.02) mg/g could be obtained when the extraction time was 50 min, the extraction temperature was 60 ℃, and the ratio of sample to 70%(v/v) ethanol was 1:20(w/w). The antioxidant property of A. nipponensis was correlated to the concentration of its extracts. At 5 mg/m L, A. nipponensisextract scavenged 84.8% of DPPH radical and had absorbance values of 2.43±0.04 reducing power. Upon CCl_4-induced liver injury, glutamic oxaloacetic transaminase and glutamic pyruvic transaminase decreased significantly after the mice were treated with A. nipponensis. Histological researches also explained that A. nipponensis reduced the extent of liver lesions induced by CCl_4. Conclusions: A. nipponensis exhibited potent antioxidant activity in chemical experimental models and hepatoprotective effect against CCl_4-induced liver damage.

关键词： Ajuga nipponensis ultrasonic-assisted extraction Orthogonal test Antioxidant hepatoprotection

ultrasonic-assisted one-pot three-component syntheses of α-aminophosphonates

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Ultrasonic-assisted one-pot three-component syntheses of α-...

Force Modeling for ultrasonic-assisted Wire Saw Cutting SiC Monocryatal Wafers

河南省化学会2010年学术年会暨成立70周年庆祝会

作者： Jingwei YUAN,Ying XUE,Shisong SONG,Pu MAO,Yongmei XIAO(School of Chemistry & Chemical Engineering,Henan University of Technology,Zhengzhou 450001,China)

GlcNH2 has wide biological activities,which could induce proliferation of leukemia K562 cells and make them differentiate between ***2 at concentrations in a certain range could kill tumor cells without influencing no... 详细信息

关键词： ultrasonic-assisted D-glucosamine α-aminophosphonates

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International Journal of Plant Engineering and Management 2011年第4期16卷 225-236页

作者： ZHANG Jie LI Shujuan Liu Yong The School of Mechanical and Instrument Engineering of Xi＇an University of Technology Xi＇an 710048 P. R. China

The advantages, such as a small cutting force, narrow kerf and little material waste make wire saw cut- ting suitable for machining precious materials like SiC, Si monocrystal and a variety of gem. As regards wire saw cutting fo wafer, however, in traditional wire saw cutting process, the cutting efficiency is low, the wear of wire saw is badly, the surface roughness of wafer is poor etc, which have a seriously impact on the cutting process stability and the use of wafers. ultrasonic-assisted machining method is very suitable for processing a variety of non-conduc- tive hard and brittle materials, glass, ceramics, quartz, silicon, precious stones and diamonds, etc. In this paper, the force model of ultrusonic-assisted wire saw cutting of SiC monocrystal wafer, based on the kinematic and experi- mental analysis were established. The single factor and orthogonal experimental scheme for different processing pa- rameters such as wire saw speed, part rotation speed of and part feed rate, were carried out in traditional wire saw and ultrasonic-assisted wire saw cutting process. The multiple linear regression method is used to establish the static model among the cutting force, processing parameters and ultrasonic vibration parameters, and the model signifi- cance is verified. The results show, as regards ultrasonic-assisted wire saw cutting of SiC monicrystal wafer, both the tangential and normal cutting forces can reduce about 24. 5%-36% and 36. 6%-40%.

关键词： wire saw ultrasonic-assisted cutting force modeling

Optimization of ultrasonic-assisted enzymatic extraction of flavonoids from the fruit oiAronia melanocarpa

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Journal of Polyphenols 2021年第1期3卷 76-83页

作者： Yan Wang Ming Song Wei Xu Weizhuo Xu Faculty of Functional Food and Wine Shenyang Pharmaceutical UniversityShenyang 110016China

As a new resource food,Aronia melanocarpa is rich in flavonoids,which has a broad development *** order to obtain a higher extraction rate of flavonoids,cellulase was used to extract total flavonoids from the fruits of Aronia melanocarpa by ultrasonic-assisted enzymatic extraction(UAEE).The extraction process was optimized by single factor experiment and orthogonal *** optimum conditions were as follows:enzymatic hydrolysis time 2.0 h,enzymatic hydrolysis temperature 37℃,enzyme content 0.5%(by weight of fruit pulp),ethanol concentration 90%,solid-liquid ratio 1:20,enzymatic hydrolysis temperature 37℃,enzymatic hydrolysis temperature 37℃,enzyme content 0.5%(by weight of fruit pulp),ethanol concentration 90%.ultrasonic extraction time 1,0h,temperature 45℃.Under the above conditions,the extraction yield of flavonoids reached 1.455 mg/*** with ultrasonic-assisted extraction(UAE),the extraction yield was significantly ***,ultrasonic-assisted enzymatic hydrolysis is an effective method for the extraction of total flavonoids hom Aronia melanocarpa.

关键词： Aronia melanocarpa cellulase ultrasonic-assisted

Isolation and purification of carbazole contained in anthracene slag by extraction combined with medium pressure liquid chromatography

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Chinese Journal of Chemical Engineering 2019年第12期27卷 2925-2929页

作者： Zhihao Ma XianyongWei Mingyao Zhou Guanghui Liu Fangjing Liu Zhongqiu Liu Xinyue Yu Zhimin Zong Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationChina University of Mining&TechnologyXuzhou 221116China State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

ultrasonic-assisted extraction(UAE)combined with medium pressure liquid chromatography(MPLC)was designed for carbazole separation from anthracene slag(AS).The effects of liquid/solid ratio,temperature,and extraction times on carbazole separation were *** using CC14 and ethyl acetate as extraction solvents and combining with MPLC,carbazole recovery and purity are 75.1%and 95.4%,*** mechanism for carbazole separation were presumed by examining intermolecular interactions such as N-H…π,π-π,and C-Cl…π*** results demonstrate that UAE/MPLC has a considerable potential as a green and promising strategy for separating and purifying carbazole and other chemicals from AS.

关键词： Anthracene slag ultrasonic-assisted extraction Medium pressure liquid chromatography Intermolecular interactions

A green method for synthesizing novel nanoparticles and their application in flexible conductive patterns

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Journal of Materiomics 2020年第2期6卷 300-307页

作者： Wei Li Qiongying Cen Wenjiang Li Zihan Zhao Wenlong Yang Yuqian Li Minfang Chen Guang Yang Jinjun Yang School of Materials Science and Engineering Tianjin Key Lab for Photoelectric Materials&DevicesNational Demonstration Center for Experimental Function Materials EducationTianjin University of TechnologyTianjin300384China Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology School of Environmental Science and Safety EngineeringTianjin University of TechnologyTianjin300384China

A general and unified approach to synthesize Ag,Cu and Au nanoparticles(NPs)is developed at room temperature in air atmosphere under ultrasonication in poly(N-vinylpyrrolidone)(PVP)solutions with ascorbic acid and glucose as the reducing and nucleation agents,***,TEM,and HR-TEM analysis of the Ag,Cu,and Au NPs confirm purity and average diameters of 15.5±2.0 nm,50±3.0 nm,and 10±1.0 nm,*** ultrasonic-assisted mechanism,wherein reduction occurs readily and produces anti-oxidation particles,is proposed and *** infrared sintering was used to avoid damaging the substrate of conductive patterns whose resistivity at 10 W(~50℃)sintering power for less than 6 min reached up to 10±0.5 μΩ cm,40±3.0 μΩ cm,and 280±5 μΩ cm for Ag,Cu,and Au patterns,***-based electrodes were produced successfully and exhibited excellent flexibility and good *** potential of this method for large scale production is discussed.

关键词： Novel nanoparticles Conductivity ultrasonic-assisted Infrared sintering

Effect of ultrasound-assisted freeze-dried on microstructure,bioactive substances,and antioxidant activity of Flos Sophorae Immaturus

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Food Bioscience 2022年第5期49卷 710-717页

作者： Yuhong Gong Jun Li Jinwei Li Liuping Fan Li Wang State Key Laboratory of Food Science&Technology Jiangnan University1800 Lihu AvenueWuxiJiangsu214122China Department of Life Science Lvliang UniversityLvliangShanxiChina Collaborat Innovat Ctr Food Safety&Qual Control Jiangnan University1800 Lihu AvenueWuxiJiangsu214122China School of Food Science and Technology Jiangnan University1800 Lihu AvenueWuxiJiangsu214122China

Flos Sophorae Immaturus(FSI)extract and its main active secondary metabolites have health benefits including antioxidant activity,but the drying process may negatively affect their quality and *** investigate the effect of ultrasound-assisted freeze-drying(UAFD)on FSI,the drying rate,colour,and microstructure samples were ***,the flavonoids and antioxidant activity of dried products were *** results showed that the drying rates were significantly enhanced with *** 600 W and 15 min,the drying time of UAFD was 40%shorter than that of freeze-drying(FD)*** micrographs showed that USAD created more porous structures that allowed water to migrate outward from inside the FSI *** conditions of 600 W ultrasonic power and 5 min ultrasonication time produced better antioxidant activity in dried products than in other *** highest characteristic properties were DPPH(75.51%),ABTS(95.14%),FRAP(83.05%),acceptable drying time(3 h),and low colour difference(1.09).Under these conditions,the contents of total flavonoids(298.34 mg/g),rutin(256.66 mg/g),quercetin(20.13 mg/g),kaempferol(19.64 mg/g),isorhamnetin(17.77 mg/g),and genistein(13.97 mg/g)were determined to be as *** results confirmed the obvious benefits of incorporating the ultrasonic effect into the FD method.

关键词： Flos Sophorae Immaturus ultrasonic-assisted Freeze-drying Bioactive substances Antioxidant activity

Synthesis and Characterization of an Extractant [Bmim]PF_6 for Lithium Ion

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 404-405页

作者： ZHANG Nan GAO Daolin LIU Mingming DENG Tianlong Tianjin Key Laboratory of Marine Resources and Chemistry College of Marine Science and Engineering at Tianjin University of Science and Technology

With the rapid increasing demand of metal lithium and its compounds in science and technology,studies on lithium recovery though lithium ion extraction from salt lake brines are blooming bacause more than 60 percent of

关键词： [Bmim]PF6 ultrasonic-assisted density refractive index