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Effects of ultrasonic-assisted extraction on bioactive compounds,volatile flavors and antioxidant activities of vine tea water extracts

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Traditional Medicine Research 2025年第1期10卷 73-81页

作者： Xiao-Long Zhou Wei-Jin Jiang Ji Yu Mao-Jun Yao yun-tong Li Hunan Provincial Key Laboratory of Research Resource Mining and High-valued Utilization on Edible&Medicinal PlantCollege of Chemistry and Chemical EngineeringJishou UniversityJishou 416000China Hunan Gaoge Dairy Co. Ltd.Changsha 410000China

Background:Ampelopsis grossedentata,vine tea,which is the tea alternative beverages in *** vine tea processing,a large amount of broken tea is produced,which has low commercial ***:This study investigates the influence of different extraction methods(room temperature water extraction,boiling water extraction,ultrasonic-assisted room temperature water extraction,and ultrasonic-assisted boiling water extraction,referred to as room temperature water extraction(RE),boiling water extraction(BE),ultrasonic assistance at room temperature water extraction(URE),and ultrasonic assistance in boiling water extraction(UBE))on the yield,dihydromyricetin(DMY)content,free amino acid composition,volatile aroma components,and antioxidant properties of vine tea ***:A notable influence of extraction temperature on the yield of vine tea extracts(P<0.05),with BE yielding the highest at 43.13±0.26%,higher than that of RE(34.29±0.81%).Ultrasound-assisted extraction significantly increased the DMY content of the extracts(P<0.05),whereas DMY content in the RE extracts was 59.94±1.70%,that of URE reached 66.14±2.78%.Analysis revealed 17 amino acids,with L-serine and aspartic acid being the most abundant in the extracts,nevertheless ultrasound-assisted extraction reduced total free amino acid *** chromatography-mass spectrometry analysis demonstrated an increase in the diversity and quantity of compounds in the vine tea water extracts obtained through ultrasonic-assisted ***,69 and 68 volatile compounds were found in URE and UBE extracts,which were higher than the number found in RE and BE *** vitro,antioxidant activity assessments revealed varying antioxidant capacities among different extraction methods,with RE exhibiting the highest DPPH scavenging rate,URE leading in ABTS•+free radical scavenging,and BE demonstrating superior ferric ion reducing antioxidant ***:The findings suggest that extraction methods signi

关键词： vine tea dihydromyricetin ultrasonic-assisted extraction volatile aroma components

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Anti-inflammation Effects of Sinomenine on Macrophages through Suppressing Activated TLR4/NF-kB Signaling Pathway

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Current Medical Science 2020年第1期40卷 130-137页

作者： Meng-you ZENG Qiao-yun tong Institute of Digestive Disease China Three Gorges UniversityYichang 443000China Department of Gastroenterology Yichang Central People's HospitalYichang 443000China

Sinomenine(SN)has been used in the clinical treatment of systemic lupus erythematosus and rheumatoid arthritis for many *** showed that SN held protective effects such as anti-inflammation,scavenging free radicals and suppressing immune response in many autoimmune *** purpose of the present study is to explore the mechanism of anti-inflammation of SN on lipopolysaccharide(LPS)-induced macrophages activation and investigate whether the TLR4/NF-κB signaling pathway participated *** isolated from mouse peritoneal cavity were stimulated by 1 pg/mL LPS for 24 *** then the cells were treated with various concentrations of SN,TLR4 inhibitor respectively for additional 48 *** toxicity was detected by MTT assay and Transwell experiment was used to assess ***,TLR4 and MyD88 mRNA levels were detected by real-time *** blotting was used to examine TLR4,MyD88 and phosphorylated IκB protein expression in *** assay was applied to observe p65 NF-κB protein expression in macrophage *** extracted macrophages with high purity and activity from the abdominal cavity of *** remarkably inhibited the chemotaxis and secretion function of LPS-stimulated *** also down-regulated both the protein levels of inflammatory cytokines(TNF-α,IL-β and IL-6)and the RNA and protein levels of the key factors(TLR4,MyD88,p-IkB)in TLR4 *** expression of p65 NF-κB protein in nuclei was down-regulated,which was correlated with a similar decrease in p-IκB protein *** conclusion,SN can inhibit the LPS induced immune responses in macrophages by blocking the activated TLR4/NF-κB signaling *** results may provide a therapeutic approach to regulate inflammatory responses.

关键词： sinomenine macrophage TLR4/NF-κB pathway

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Detection of Multi-dimensional Driving Forces of Public Environmental Concern in China:Based on Spatial Heterogeneity Perspectives

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Chinese Geographical Science 2023年第6期33卷 1109-1126页

作者： tong yun PANG Li SUN Minghui HAN Junyi School of Tourism Hainan UniversityHaikou570228China Hainan Province Holistic Tourism Research Base Haikou570228China Academician Station of Hainan Province Haikou570228China

Public environmental concern(PEC)is an important bottom-up force in building an environmentally sustainable *** by attitude theory,this paper innovatively constructed a PEC evaluation index system,while introducing entropy weighted-TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)to realize the assessment of *** spatial data analysis was used to portray the spatio-temporal evolution patterns of PEC in 362 Chinese cities at prefecture-level and above from 2011 to ***,the Geodetector model was performed to identify the multi-dimensional determinants of PEC from the perspective of spatial *** results indicated that:1)PEC in China exhibited a fluctuating upward trend,consistent with the spatial distribution law of‘Heihe-Tengchong Line’and‘Bole-Taipei Line’;2)the driving effect of each factor varied dynamically,but in general,economic development level,population size,industrial wastewater,and education level were the dominant driving factors explaining the spatial variation of PEC;3)risk detection revealed that four factors,government environmental regulations,PM_(2.5),vegetation coverage,and natural resource endowment,had nonlinear effects on PEC;4)the interactions between factors all demonstrated an enhancement in explaining the spatial differentiation of *** was driven by the comprehensive interaction of four-dimensional factors of economy,society,pollutant emissions,and *** them,population agglomeration accompanied by a high level of regional economy and information technology can explain the increase in PEC to the greatest extent.

关键词： public environmental concern(PEC) spatio-temporal variations driving factors Geodetector Baidu Index spatial heterogeneity

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Metal oxides heterojunction derived Bi-In hybrid electrocatalyst for robust electroreduction of CO_(2) to formate

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Journal of Energy Chemistry 2023年第8期83卷 180-188,I0007页

作者： Runze Ye Jiaye Zhu yun tong Dongmei Feng Pengzuo Chen School of Chemistry and Chemical Engineering Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang ProvinceZhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina

Electrochemical reduction of Bi-based metal oxides is regarded as an effective strategy to rationally design advanced electrocatalysts for electrochemical CO_(2)reduction reaction(CO_(2)RR).Realizing high selectivity at high current density is important for formate production,but remains ***,the BiIn hybrid electrocatalyst,deriving from the Bi2O3/In2O3heterojunction(MOD-Biln),shows excellent catalytic performance for CO_(2)*** Faradaic efficiency of formate(FEHCOO-) can be realized over 90% at a wide potential window from-0.4 to-1.4 V ***,while the partial current density of formate(jHCOO-) reaches about 136.7 mA cm^(-2)at-1.4 V in flow cell without *** additio n,the MOD-Biln exhibits superior stability with high selectivity of formate at 100 mA cm^(-2).Systematic characterizations prove the optimized catalytic sites and interface charge transfer of MOD-Biln,while theoretical calculation confirms that the hybrid structure with dual Bi/In metal sites contribute to the optimal free energy of*H and*OCHO intermediates on MOD-Biln surface,thus accelerating the formation and desorption step of*HCOOH to final formate *** work provides a facile and useful strategy to develop highly-active and stable electrocatalysts for CO_(2)RR.

关键词： Metal oxide derivation Hybrid electrocatalyst Dual metal sites Electrocatalytic CO_(2)RR Formate product

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Electronic structural engineering of bimetallic Bi-Cu alloying nanosheet for highly-efficient CO_(2) electroreduction and Zn-CO_(2) batteries

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Nano Research 2024年第5期17卷 3684-3692页

作者： Wenbo Wu Jiaye Zhu yun tong Shuangfei Xiang Pengzuo Chen School of Chemistry and Chemical Engineering Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang ProvinceZhejiang Sci-Tech UniversityHangzhou 310018China

Regulating the electronic structure of Bi-based materials by alloying engineering is promising to promote the electrocatalytic activity,but it remains some challenges to be *** this study,a facile electrochemical co-deposition strategy is developed to synthesize the bimetallic Bi_(9)Cu_(1) alloy nanosheet on carbon cloth(Bi_(9)Cu_(1)/CC),which represents a novel self-supporting electrode for the electrocatalytic carbon dioxide(CO_(2))reduction reaction(CO_(2)RR).The Bi_(9)Cu_(1)/CC catalyst has achieved a remarkable catalytic performance with high Faradaic efficiencies(FE)of over 90%for formate at wide potentials from-0.7 to-1.2 V *** hydrogen electrode(RHE).Moreover,the reversible Zn-CO_(2) battery can be driven by Bi_(9)Cu_(1)/CC cathode with a largest power density of 1.4 mW·cm^(-2),and superior operating *** systematic characterizations and electrochemical results confirm that the improved catalytic active sites,the enhanced mass/charge transport and the optimal reaction kinetics of Bi nanosheet are realized for CO_(2)RR by Cu *** situ attenuated total reflection infrared(ATR-IR)result confirms the bimetallic Bi-Cu active sites prefer to follow the^(*)OCHO conversion *** density functional theory(DFT)calculations suggest that the Cu alloying contributes to the increased density of states near the Fermi surface of Bi and the optimized adsorption of^(*)OCHO intermediates on the Bi sites,resulting in the excellent catalytic performance.

关键词： electronic regulation bismuth nanosheet copper alloying CO_(2)electroreduction Zn-CO_(2)batteries

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Visible-light-driven photocatalysis degradation of antibiotic pollutants by La-doped CeO_(2) nanorods:synergy of La doping and oxygen vacancy

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Rare Metals 2024年第7期43卷 3134-3145页

作者： Shi-Hai Cao Jing-Ru Qu Yu-Qi Zhao yun-tong Sun Wen-tong Gao Bing Han Yao Lu College of Environmental Engineering Nanjing Institute of TechnologyNanjing 211167China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167China School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological UniversitySingapore 637459Singapore Institute of Environmental Health and Ecological Security School of Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou215009China

Elemental doping is an effective strategy to enhance photocatalytic activity and extend the light absorption range of single-component *** this work,a series of La-doped CeO_(2) nanorods(La-CeO_(2)-x) with La content of 1 wt%-15 wt% are synthesized by a simple hydrothermal method and further used as photocatalyst for sulfamerazine(SMR) *** prepared La-CeO_(2)-x nanorods exhibit a great improvement in electron-hole pair migration and visible-light response due to the synergistic effect of abundant oxygen vacancies and heterogeneous elements(La).Consequently,La-CeO_(2)-x exhibited excellent visible-light photocatalytic performances and chemical stability for SMR degradation,the La-CeO_(2)-5 sample achieved the highest SMR degradation rate of 81%,which was 3.4 times higher than that of the original CeO_(2).Furthermore,three possible degradation pathways of SMR in La-CeO_(2) photocatalytic reactions were proposed by liquid chromatography-mass spectrometry ***,density functional theory calculations were carried out to provide an in-depth understanding of the structure-performance *** its excellent properties and better photocatalytic performance,this study demonstrates that La doping in CeO_(2) is an effective way to increase oxygen vacancy and improve the photochemical properties of photocatalysts.

关键词： CeO_(2)nanorod La-doped Photocatalysis Oxygen vacancy Sulfamerazine

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High Speed of Tufting Machine Based on Transfer Matrix Method

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Journal of Donghua University(English Edition) 2018年第6期35卷 495-499页

作者： DING Caihong tong yun Colleage of Mechanical Engineering Donghua University

In order to achieve high speed of tufting machine,the oval gear is used as the transmission mechanism between the main shaft and the slave shaft. And then,mathematical model of tufting machine spindle system is established by transfer matrix ***,the dynamic reaction force of the connection and the unbalanced response of the joint between the general tufting machine and the improved spindle system are studied by using Matlab numerical simulation. The analysis results showthat when the spindle speed reaches 1 000 r/min, the dynamic reaction force of the improved spindle system at the joint is far less than that of the general tufting machine,and the unbalanced response is reduced from 0. 22 mm to 0. 10 mm.

关键词： tufting machine high speed oval gear dynamic reaction force unbalanced response vibration

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Magnetic separation of pentlandite from serpentine by selective magnetic coating

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International Journal of Minerals,Metallurgy and Materials 2019年第1期26卷 1-10页

作者： Ji-wei Lu Zhi-tao Yuan Xiao-fei Guo Zhong-yun tong Li-xia Li School of Resources and Civil Engineering Northeastern University Shaanxi Key Laboratory for the Comprehensive Utilization of Tailings Resources Shangluo University School of Mining Engineering University of Science and Technology Liaoning

In this study, pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH, stirring speeds, magnetic field intensities, and dosages of sodium hexametaphosphate(SHMP) and sodium oleate(SO). A magnetic concentrate with Ni grade of 20.8% and Ni recovery of 80.5% was attained under the optimized operating conditions. Considering the above, the adsorption behaviors of SHMP and SO and the surface properties of minerals after the magnetic coating were studied by Fourier transform infrared(FTIR) spectroscopy, X-ray diffraction(XRD), and scanning electron microscopy(SEM). The results show that magnetite was preferentially coated on the pentlandite surfaces and sparingly coated on the serpentine surfaces in the presence of SHMP and SO. Furthermore, calculations by Derjaguin-Landau-Verwey-Overbeek(DLVO) theory indicate that the preferential adsorption of magnetite on the pentlandite surfaces is due to the presence of a hydrophobic interaction between the magnetite and pentlandite, which is much stronger than the interaction between magnetite and serpentine.

关键词： dispersant coagulant magnetic coating magnetic separation hydrophobic interaction

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Negative Magnetoresistance Effect in La-Pb-Mn-O Bulk Manganese Oxides

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Chinese Physics Letters 1996年第2期13卷 129-132页

作者： ZHAO tong-yun LI Min ZHAO Xue-gen WANG Fang-wei LI yun-fei SHEN Bao-gen ZHAO Jian-gao State Key Laboratory of Magnetism Institute of PhysicsAcademia SinicaBeijing 100080

The structure,inagnetic and magnetotransport properties of La_(1-x),Pb_(x) MnO bulk manganese oxides prepared by the standard ceramic techniques were investigated by XRD,VSM,ESM and MR *** sintering condition and the hole doped concentration x have a strong iniluence&n the magnetic properties and niagnetore-sistance *** maximum MR,20%at room temperature under a field of 2 T, was obtained for x=0.4 and the sintered temperature T_(3)=1260℃.The correlation among the structure,magnetic and MR is discussed.

关键词： resistance effect structure

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Annealing atmosphere-dependent capacitive energy storage

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Rare Metals 2023年第5期42卷 1465-1471页

作者： Bing-Bing Yang Hai-yun tong Shun Lan Yi-Qian Liu Lv-Ye Dou Hao Pan Yuan-Hua Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China School of Physics and Materials Engineering Hefei Normal UniversityHefei230601China Department of Materials Science and Engineering University of CaliforniaBerkeley94720USA

Electrostatic capacitors based on dielectrics with high energy density and efficiency are desired for modern electrical systems owing to their intrinsic fast charging-discharging speed and excellent *** longstanding bottleneck is their relatively small energy ***,we report enhanced energy density and efficiency in the Aurivillius Pb_(2)Bi_(4)Ti_(5)O_(18)films by controlling the post-annealing *** results demonstrate that the fabrication atmosphere has significant effects on the film texture and *** the increase of the oxygen pressure of annealing atmosphere,the Pb_(2)Bi_(4)Ti_(5)O_(18)films show a preferred growth orientation of(00l)and fewer defects,which leads to a higher polarization and breakdown field for the film annealed in air atmosphere and thus help to achieve an ultrahigh energy density of59.4 J·cm^(-3)and an improved efficiency of 81.2%.Moreover,the film also exhibits excellent cycling reliability and good thermal *** Pb_(2)Bi_(4)Ti_(5)O_(18)films show a significant potential application for dielectric capacitors.

关键词： Aurivillius phase film Annealing atmosphere Energy density Efficiency

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