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Studies on Triterpenoid Glycosides from Rhizomes ofPanacis majoris and Their Antiplatelet Aggregation Activity

Chemical Research in Chinese Universities 2016年第6期32卷 943-946页

作者： li Min JIN Yongri WANG Xiaozhong WU Qian liU Ying li Peng li xuwen College of Chemistry Jilin University Changchun 130021 P. R. China

A new triterpenoid glycoside（l） and seven known triterpenoid glycosides, pseudoginsenoside RT2（2）,yesanchinoside R2（3）, vinaginsenoside R13（4）, vinaginsenoside R8（5）, notoginsenoside E（6）, 6＂＇-O-acetylginsenosideRe（7）, 6＂-O-acetylginsenoside Rbl（8）, were isolated from the rhizomes of Panaeis maforis. The new triterpenoidglycoside was elucidated as 3-O-[β-D-glucopyranosyl-（l→2）-fl-D-（6＇-O-ethyl）-glucuronopyranosyl]-oleanolicacid-28-O-β-D-glucopyranoside by extensive spectroscopic and phytochemical methods. Compounds 2-8 wereobtained from the plant for the first time. Compounds 3 and 4 displayed good activities against adenosine diphosphate（ADP）-induced platelet aggregation, and compounds 1, 5, 6 and 8 showed moderate activities. Compound 6 exhibitedmoderate antiplatelet aggregation activity induced by arachidonic acid（AA）.

关键词： Panacis majoris Rhizome Triterpenoid glycoside Antiplatelet aggregation

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The research and implementation of interfacing based on PCI express

The research and implementation of interfacing based on PCI ...

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9th International Conference on Electronic Measurement and Instruments, ICEMI 2009

作者： Wu, Qiang Xu, Jiamou li, xuwen Jia, Kebin College of Electronic Information and Control Engineering Beijing University of Technology Pingleyuan 100 Chaoyang district 100124 China

ISBN: (纸本)9781424438624

PCI Express is rapidly establishing itself as the successor to PCI, which provides higher performance, increased flexibility, and scalability for next-generation systems. FPGA offers a flexible solution for PCI Express compared with ASIC. Using IP Core and designing a DMA module in FPGA, this paper implemented a high-performance PCI Express system. IP Core handles the protocols defined by PCI Express specification. DMA module accelerates the transmission between FPGA and PC memory, sufficiently exploiting PCI Express bus bandwidth. This article proposes and achieves a PCI Express system having DMA transfer ability and emphatically describes the design of the DMA engine in system-logic, in addition to the corresponding Windows WDM driver and GUI application. The result of performance test is presented finally. ©2009 IEEE.

关键词： Intellectual property core

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Studies on New Steroidal Saponins from Allii macrostemonis Bulbus and Their Antitumor Activities

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Chemical Research in Chinese Universities 2018年第1期34卷 61-66页

作者： YAO Hua WANG Tong WU Qian liU Ying li Peng li xuwen JIN Yongri Scienttfic Research Center China-Japan Union Hospital of Jilin University Changchun 130033 P. R. China College of Chemistry Jilin University Changchun 130012 P. R. China

Two new steroidal saponms（2, 3） and two known compounds（1, 4） were isolated from 75% ethanol extract ofAllii macrostemonis bulbus by various spectral methods. The two new steroidal saponins were respectively elucidated as （25S）-26-O-β-D-glucopyranosyl-5α-furostanol-2α,3β,22,26-tetrol-3-O-β-D-glucopyranosyl（1→2）-[β-D- glucopyranosyl（1→3）]-β-D-glucopyranosyl（1→4 ）-β-D-galactopyranoside（2 ） and 26-O-β-D-glucopyranosyl-5α- furostanol-25（ 27）-ene-3β,22,26-tetrol-3-O-β-D-glucopyranosyl（ 1→2 ）-[β-D-glucopyranosyl（ 1→3 ）] -β-D-glucopyranosyl- （1→4）-β-D-galactopyranoside（3）. Compound 4 was obtained from this medical plant for the first time. The activity experiments of proliferation inhibition on tumor cells were performed by cell counting kit-8（CCK-8） method for compound 2（25S-configuration） and its isomer（compound 1, 25R-configttration）. The results show that compounds 1 and 2 have weak inhibition on lung cancer A549 cells, melanoma A375 cells and breast cancer MCF-7 cells as well as certain inhibitory effect on liver cancer HepG2 cells, and the inhibitory effect of compound 1 is stronger than that of compound 2.

关键词： Allii macrostemonis bulbus Steroidal saponin Structure identification Proliferation inhibition Cell counting kit-8（CCK-8） method

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Green determination of aconitum alkaloids in Aconitum carmichaeli (Fuzi) by an ionic liquid aqueous two-phase system and recovery of the ionic liquid coupled with in situ liquid-liquid microextraction

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ANALYTICAL METHODS 2016年第35期8卷 6566-6572页

作者： Wang, Xiaozhong li, xuwen li, Lanjie li, Min Wu, Qian liu, Ying Yang, Jie Jin, Yongri Jilin Univ Coll Chem Changchun 130012 Peoples R China Ningxia Univ Sch Chem & Chem Engn Yinchuan 750021 Peoples R China

A green and effective extraction system based on the use of an ultrasound-assisted ionic liquid aqueous two-phase system (IL-ATPS) was developed for the determination of aconitum alkaloids in lateral roots of Aconitum carmichaeli Debx (Fuzi in Chinese). IL-ATPS parameters, including the type and amount of ionic liquid, amount of salts, and pH value, as well as extraction time, were investigated. Under the optimized conditions, the recoveries of the analytes varied from 80.37 to 107.18%. The detection limits and quantification limits for the analytes were achieved within the ranges of 0.048-0.082 mg g(-1) and 0.16-0.30 mg g(-1), respectively. After extraction, the recovery of ionic liquids without the use of organic solvents was also confirmed. The hydrophilic ionic liquids (1-hexyl-3-methylimidazolium bromide) were converted into hydrophobic ionic liquids (1-hexyl-3-methylimidazolium hexafluorophosphate) by a metathesis reaction, and in situ liquid-liquid microextraction was triggered simultaneously. Finally, 0.1 mol L-1 HCl aqueous solution (containing 5% Tween-20) was used as the back-extraction agent to recover the ionic liquids.

关键词： Ionic liquids Aconitum alkaloids 1-hexyl-3-methylimidazolium liquid Phase Microextraction Aconitum carmichaelii phase system mining system

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Intra-articular injection of vancomycin after arthrotomy closure following gentamicin-impregnated bone cementation in primary total knee arthroplasty provides a high intra-articular concentration while avoiding systemic toxicity: a prospective study

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JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH 2024年第1期19卷 1-9页

作者： li, xuwen Lai, Junhao Yang, Xue Xu, Hao Xiang, Shuai Qingdao Univ Affiliated Hosp Dept Traumatol Qingdao Shandong Peoples R China Qingdao Univ Affiliated Hosp Dept Joint Surg Qingdao 266000 Shandong Peoples R China Qingdao Univ Affiliated Hosp Operat Room Qingdao Shandong Peoples R China

BackgroundThis study aimed to elucidate the safety and intra-articular elution profiles of vancomycin and gentamicin bone cement in patients undergoing primary total knee arthroplasty (TKA), with a focus on serum safety thresholds and therapeutic *** patients who underwent unilateral primary TKA were prospectively enrolled. The implants were fixed using gentamicin-impregnated bone cement, and after arthrotomy closure, 1000 mg of vancomycin suspended in 25 mL of normal saline was directly injected into the joint. Peripheral venous blood and drain fluid samples were collected 2, 8, and 24 h postoperatively. The serum and intra-articular concentrations of vancomycin and gentamicin were analyzed using liquid chromatography-tandem mass spectrometry within 24 *** data reflecting renal and liver function were recorded preoperatively, and at 24 and 72 h postoperatively. A total of 100 patients were included. At 2, 8, and 24 h postoperatively, the serum vancomycin concentration was 7.0 +/- 2.0, 5.7 +/- 1.8, and 3.6 +/- 1.4 mu g/mL, respectively, while the intra-articular concentration was 468.5 (interquartile range [IQR] 286.0 to 774.8), 139.5 (IQR 52.0 to 295.3), and 34.4 (IQR 22.2 to 56.8) mu g/mL, respectively;33.2 (IQR 19.5 to 80.5) mg vancomycin was lost in drainage fluid at 24 h postoperatively. For gentamicin, the overall intra-articular concentration was 70.4 (IQR 35.4 to 109.2), 33.8 (IQR 17.8 to 73.9), and 21.1 (IQR 12.2 to 36.0) mu g/mL at 2, 8, and 24 h postoperatively, respectively, with an undetectable serum concentration. No cases of acute renal injury, liver injury, ototoxicity, or anaphylaxis were ***-articular injection of 1000 mg vancomycin after arthrotomy closure combined with gentamicin-impregnated bone cement provided a therapeutic intra-articular concentration while avoiding systemic toxicity over the initial 24 h after primary TKA. Therefore, intra-articular vancomycin administration may off

关键词： Vancomycin Gentamicin Total knee arthroplasty

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The antiallergic activity of flavonoids extracted from Citri Reticulatae Pericarpium

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JOURNAL OF FOOD PROCESSING AND PRESERVATION 2018年第4期42卷 e13588-e13588页

作者： Shi, Xiaolei Niu, liyan Zhao, lina Wang, Bo Jin, Yongri li, xuwen Jilin Univ Dept Food Qual & Safety Coll Food Sci & Engn Changchun 130062 Jilin Peoples R China Jilin Univ Dept Analyt Chem Coll Chem Changchun 130012 Jilin Peoples R China

The fruits of Citrus are popular all over the world. It was reported that the extracts of fruits possessed antiallergic activities. In China, Citri Reticulatae Pericarpium (CRP) is a production of peels. In this study, flavonoids were extracted by solvent method, and enriched by polyamide. Then antiallergic activity of flavonoids was investigated in vivo and in vitro. Under optimal parameters, most abundant compounds of extracts were hesperidin and narirutin, their contents were 232.0325 and 98.7946 mg/g, respectively. In vitro, RBL-2H3 cell line was used to investigate the antiallergic activity. As the results shown, -hexosaminidase release of antigen-induced degranulation was decreased by flavonoids. An ovalbumin-induced allergic asthmatic model was used to test the activity of the flavonoids in vivo. After treated with different concentrations of flavonoids, the levels of IgE, IL-4, and IL-13 decreased significantly. These findings provide evidence that flavonoids extracted from CRP have potential using in antiallergic therapeutic area. Practical applicationsOranges are popular all over the world as fruit, besides a little percent of peels are applied as traditional medicine in China, the others are thrown away as rubbish. To explore the new way to extend the application of peels, we extracted the total flavonoids from Citri Reticulatae Pericarpium (CRP) and evaluated the antiallergic activity of it. Fortunately, the total flavonoids have antiallergic activity in vitro and vivo. The findings provide evidence that extracts from CRP have potential using in antiallergic therapeutic area. It can also afford a theoretical basis for the new application of orange peel.

关键词： Citrus fruits

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Design of Signal Source Board Based on PXIe Standard 22

Design of Signal Source Board Based on PXIe Standard

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8th International Conference on Computing and Artificial Intelligence, ICCAI 2022

作者： Tang, Changjiang Wu, Qiang li, xuwen liu, Jie Faculty of Information Technology Beijing University of Technology China

ISBN: (纸本)9781450396110

This paper designs a Signal Source Board based on PXIe standard. The Signal Source Board adopts XCKU060-2FFVA1157I of Xilinx company as the main control chip of the FPGA, AD9144 of ADI company as the DAC, the Host Computer sends the analog signal waveform code table to be generated to the Signal Source Board through the PCIe Bus, and then the FPGA of the Source Board based sends the analog signal waveform code table to two pieces of AD9144 through the JESD204B interface. Finally, the generated analog signal is filtered through the low-pass filter HMC1023, and completes the output of 8-channel analog signal. It achieves the high-quality generation of any modulated signal from baseband to mid-frequency, and meets the synchronous output requirements of 8-channel analog signal. © 2022 ACM.

关键词： Field programmable gate arrays (FPGA)

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Design and Implementation of Automatic Testing Software Based on Labview and TestStand 22

Design and Implementation of Automatic Testing Software Base...

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8th International Conference on Computing and Artificial Intelligence, ICCAI 2022

作者： Zhang, Youquan li, xuwen Wu, Qiang liu, Jie Beijing University of Technology China

ISBN: (纸本)9781450396110

With the increasing complexity of circuit board function, both the performance index of circuit board and the number of circuit test points are increasing day by day. It is far from satisfying the test demand of large-scale board production manually. In order to realize automatic test of electrical signal on board, automatic configuration of test sequence and automatic generation of test report, this paper designed an automatic test software management platform based on Labview and TestStand, and proposed a solution of automatic generation of test report according to template. And this paper provides a method of parameter configuration and management of instrument and result threshold of automatic test sequence, which further improves the test efficiency of automatic test and realizes unified management of test parameters, compared with gradually configuring instrument parameters in each test step of test sequence. © 2022 ACM.

关键词： Software testing

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Well-Tailored Dynamic liquid Crystal Networks with Anionically Polymerized Styrene-Butadiene Rubbers toward Modulating Shape Memory and Self-Healing Capacity

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MACROMOLECULES 2021年第6期54卷 2691-2702页

作者： Lei, Lan Han, li Ma, Hongwei Zhang, Ruixue li, xuwen Zhang, Songbo li, Chao Bai, Hongyuan li, Yang Dalian Univ Technol Sch Chem Engn State Key Lab Fine Chem Dept Polymer Sci & EngnLiaoning Key Lab Polymer Dalian 116024 Peoples R China

Well-tailored construction of liquid crystal networks (LCNs) with simultaneous molecular mobility and mechanical enhancement is desirable. Since the properties of polymeric materials are largely a result of the molecular compositions of polymer chains, in the present work, we demonstrate the tuning compositional synthesis of anionically polymerized random styrene-butadiene rubbers (r-SBRs) with well-controlled 75 wt % butadiene (Bd) contents that offer molecular mobility. Microstructural 1,2-olefins of 51.5-64.0 mol % were designed to attach 50 mol % SiH-terminated mesogenic moieties (M) along Bd units using hydrosilylation. As mechanical strength usually conflicts with high molecular mobility, an integrated design derived from the orderly LC stacking and simultaneous crosslinking in various ratios of the dynamic 2(6-isocyanatohexylaminocarbonylamino)-6methyl-4[1H]-pyrimidinone (UPy-NCO) and permanent hexamethylene diisocyanate (HMDI) along 1,4-olefins of Bd units offers necessary mechanical strength and molecular mobility, resulting in a series of dynamic LCNs (r-SBR-g-[***]). LC textures, phase transitions, self-healing/welding, and shape memory capacities were comprehensively studied. All LCNs showed LC textures in POM around T-i (42- 53 degrees C), which definitely contributed to both mechanical performance and molecular mobility due to the 50 mol % orderly LC stacking. Ureidopyrimidinone (UPy) that forms a dynamic H-bond is beneficial for the temporary shape fixity ratio (R-f), recyclability, and self-healing/welding ability while decreasing the shape recovery ratio (R-rec) because UPy can increase breaking elongations but sacrifice the mechanical strength. However, HMDI that forms a covalent crosslink showed the contrary effect, as HMDI can effectively enhance the mechanical strength but reduce the chain mobility. It is evidenced that r-SBR45k-g-[M-0%, 2%] can hardly undergo shape recovery (R-rec = 0) despite R-f = 92.6%, while with regard to r-SBR45k-g

关键词： Deformation Self healing materials Shape memory Differential scanning calorimetry liquid chromatography Chromatography

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An optimized microwave-assisted extraction method for increasing yields of rare ginsenosides from Panax quinquefolius L.

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JOURNAL OF GINSENG RESEARCH 2016年第4期40卷 415-422页

作者： Yao, Hua li, xuwen liu, Ying Wu, Qian Jin, Yongri Jilin Univ China Japan Union Hosp Ctr Sci Res Changchun Jilin Peoples R China Jilin Univ Coll Chem 2519 Jiefang St Changchun 130012 Jilin Peoples R China

Background: Rare ginsenosides in Panax quinquefolius L. have strong bioactivities. The fact that it is hard to obtain large amounts of rare ginsenosides seriously restricts further research on these compounds. An easy, fast, and efficient method to obtain different kinds of rare ginsenosides simultaneously and to quantify each one precisely is urgently needed. Methods: Microwave-assisted extraction (MAE) was used to extract nine kinds of rare ginsenosides from P. quinquefolius L. In this article, rare ginsenosides [20(S)-Rhl, 20(R)-Rhl, Rg6, F4, Rk3, 20(S)-Rg3, 20(R)-Rg3, Rk1, and Rg5] were identified by high performance liquid chromatography (HPLC)-electrospray ionization-mass spectrometry. The quantity information of rare ginsenosides was analyzed by HPLC-UV at 203 nm. Results: The optimal conditions for MAE were using water as solvent with the material ratio of 1:40 (w/v) at a temperature of 145 degrees C, and extracting for 15 min under microwave power of 1,600 W. Seven kinds of rare ginsenosides 120(S)-Rh1, 20(R)-Rh1, Rg6, F4, Rk3, Rk1, and Rg5] had high extraction yields, but those of 20(S)-Rg3 and 20(R)-Rg3 were lower. Compared with the conventional method, the extraction yields of the nine rare ginsenosides were significantly increased. Conclusion: The results indicate that rare ginsenosides can be extracted effectively by MAE from P. quinquefolius L in a short time. Microwave radiation plays an important role in MAE. The probable generation process of rare ginsenosides is also discussed in the article. It will be meaningful for further investigation or application of rare ginsenosides. Copyright (C) 2016, The Korean Society of Ginseng, Published by Elsevier.

关键词： high performance liquid chromatography/mass spectrometry microwave-assisted extraction Panax quinquefolius L. rare ginsenosides

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