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  1. Article ; Online: Bioaccumulation, transfer characteristics of metals in six vascular plants, and soil pollution assessment from Wachangping karst bauxite residue areas.

    Wang, Dengfu / Wu, Qimei / Zhang, Zhaohui

    International journal of phytoremediation

    2024  , Page(s) 1–11

    Abstract: Bauxite residue (BR) is a large volume by-product generated during bauxite smelting process and metal pollution problem is becoming increasingly prominent in residue areas. Accumulation and transfer of metals in six vascular plants were analyzed and soil ...

    Abstract Bauxite residue (BR) is a large volume by-product generated during bauxite smelting process and metal pollution problem is becoming increasingly prominent in residue areas. Accumulation and transfer of metals in six vascular plants were analyzed and soil environment was evaluated. Results found levels of Al (2,110-26,280 mg kg
    Language English
    Publishing date 2024-03-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2055357-2
    ISSN 1549-7879 ; 1522-6514
    ISSN (online) 1549-7879
    ISSN 1522-6514
    DOI 10.1080/15226514.2024.2331713
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Five new compounds from the stems of Ephedra equisetina.

    Tao, Siqi / Zhu, Denghui / Tie, Qimei / Wu, Yuanyuan / Zhang, Jingke / Zheng, Xiaoke / Feng, Weisheng

    Fitoterapia

    2024  Volume 175, Page(s) 105907

    Abstract: Five new compounds were identified from the stems of Ephedra equisetina Bunge. Their structures were elucidated by spectroscopic methods, involving UV, IR, NMR spectrum and HRESIMS analyses. The absolute configuration of compound 2 was proved by ... ...

    Abstract Five new compounds were identified from the stems of Ephedra equisetina Bunge. Their structures were elucidated by spectroscopic methods, involving UV, IR, NMR spectrum and HRESIMS analyses. The absolute configuration of compound 2 was proved by comparing their experimental and calculated ECD spectrum. The vitro bioactive assay of all compounds suggested that compound 1, 3, 4, 5 and 6 may have potential anti-asthmatic activities.
    Language English
    Publishing date 2024-03-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 412385-2
    ISSN 1873-6971 ; 0367-326X
    ISSN (online) 1873-6971
    ISSN 0367-326X
    DOI 10.1016/j.fitote.2024.105907
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 1873: Show issues Location:
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  3. Article: Development of Electromagnetic-Wave-Shielding Polyvinylidene Fluoride-Ti

    Zhang, Qimei / Cui, Jian / Zhao, Shuai / Zhang, Guangfa / Gao, Ailin / Yan, Yehai

    Nanomaterials (Basel, Switzerland)

    2023  Volume 13, Issue 3

    Abstract: Absorption-dominated electromagnetic interference (EMI) shielding is attained by improving impedance matching and conductivity through structural design. Polyvinylidene fluoride (PVDF)- ... ...

    Abstract Absorption-dominated electromagnetic interference (EMI) shielding is attained by improving impedance matching and conductivity through structural design. Polyvinylidene fluoride (PVDF)-Ti
    Language English
    Publishing date 2023-01-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano13030417
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  4. Article: The Efficacy and Safety of Acupuncture in Treating Stress Urinary Incontinence in Women from a Meta-Analysis of Four Randomized Controlled Trials.

    Cui, Yuanshan / Ma, Qimei / Zhang, Yong / Wei, Guangzhu / Zhou, Zhongbao

    Archivos espanoles de urologia

    2023  Volume 76, Issue 1, Page(s) 40–49

    Abstract: Purpose: To verify the efficacy and safety of acupuncture in treating stress urinary incontinence (SUI) in women in a single treatment cycle lasting at least 6 weeks.: Methods: A preferred reporting items for systematic reviews and meta-analyses ( ... ...

    Abstract Purpose: To verify the efficacy and safety of acupuncture in treating stress urinary incontinence (SUI) in women in a single treatment cycle lasting at least 6 weeks.
    Methods: A preferred reporting items for systematic reviews and meta-analyses (PRISMA) summary was followed correctly. Through the use of EMBASE, Cochrane Library databases, and PubMed (until July 2021), we looked for randomized controlled trials. In addition, the included articles' original references were looked up as well.
    Results: Totally, we analyzed four studies including 690 patients. Compared with the sham acupuncture group, this analysis verified that acupuncture was critically better result in decreasing mean urine leakage (
    Conclusions: Acupuncture is more beneficial to patients with stress urinary incontinence in women with no critical difference in the incidence of advent events than sham acupuncture.
    MeSH term(s) Humans ; Female ; Urinary Incontinence, Stress/therapy ; Randomized Controlled Trials as Topic ; Urinary Incontinence ; Acupuncture Therapy/adverse effects ; Pelvic Floor ; Treatment Outcome
    Language English
    Publishing date 2023-03-13
    Publishing country Spain
    Document type Meta-Analysis ; Journal Article
    ZDB-ID 211673-x
    ISSN 0004-0614
    ISSN 0004-0614
    DOI 10.56434/j.arch.esp.urol.20237601.3
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  5. Article ; Online: Visual assessment of global chromatin intranuclear localization and its cellular diversification in mouse cells.

    Wang, Yongqiang / Yao, Xinyi / Xu, Yuanyuan / Cheng, Xu / Peng, Jiangyun / Pan, Qimei / Hu, Kaishun / Li, Lu / Zhang, Yin / Yin, Dong

    Acta biochimica et biophysica Sinica

    2023  Volume 55, Issue 3, Page(s) 518–520

    MeSH term(s) Mice ; Animals ; Chromatin/genetics ; Cell Nucleus
    Chemical Substances Chromatin
    Language English
    Publishing date 2023-03-06
    Publishing country China
    Document type Journal Article
    ZDB-ID 2175256-4
    ISSN 1745-7270 ; 0582-9879 ; 1672-9145
    ISSN (online) 1745-7270
    ISSN 0582-9879 ; 1672-9145
    DOI 10.3724/abbs.2023034
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  6. Article ; Online: Development of Electromagnetic-Wave-Shielding Polyvinylidene Fluoride–Ti 3 C 2 T x MXene–Carbon Nanotube Composites by Improving Impedance Matching and Conductivity

    Qimei Zhang / Jian Cui / Shuai Zhao / Guangfa Zhang / Ailin Gao / Yehai Yan

    Nanomaterials, Vol 13, Iss 417, p

    2023  Volume 417

    Abstract: Absorption-dominated electromagnetic interference (EMI) shielding is attained by improving impedance matching and conductivity through structural design. Polyvinylidene fluoride (PVDF)–Ti 3 C 2 T x MXene–single-walled carbon nanotubes (SWCNTs) composites ...

    Abstract Absorption-dominated electromagnetic interference (EMI) shielding is attained by improving impedance matching and conductivity through structural design. Polyvinylidene fluoride (PVDF)–Ti 3 C 2 T x MXene–single-walled carbon nanotubes (SWCNTs) composites with layered heterogeneous conductive fillers and segregated structures were prepared through electrostatic flocculation and hot pressing of the PVDF composite microsphere-coated MXene and SWCNTs in a layer-by-layer fashion. Results suggest that the heterogeneous fillers improve impedance matching and layered coating, and hot compression allows the MXene and SWCNTs to form a continuous conducting network at the PVDF interface, thereby conferring excellent conductivity to the composite. The PVDF-MXene-SWCNTs composite showed a conductivity of 2.75 S cm −1 at 2.5% MXene and 1% SWCNTs. The EMI shielding efficiency (SE) and contribution from absorption loss to the total EMI SE of PVDF-MXene-SWCNTs were 46.1 dB and 85.7%, respectively. Furthermore, the PVDF-MXene-SWCNTs composite exhibited excellent dielectric losses and impedance matching. Therefore, the layered heteroconductive fillers in a segregated structure optimize impedance matching, provide excellent conductivity, and improve absorption-dominated electromagnetic shielding.
    Keywords electromagnetic interference shielding ; segregated structure ; polyvinylidene fluoride ; MXene ; single-walled carbon nanotubes ; Chemistry ; QD1-999
    Subject code 535
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Structural design and preparation of Ti

    Zhang, Qimei / Wang, Qi / Cui, Jian / Zhao, Shuai / Zhang, Guangfa / Gao, Ailin / Yan, Yehai

    Nanoscale advances

    2023  Volume 5, Issue 14, Page(s) 3549–3574

    Abstract: Electromagnetic interference (EMI) is a pervasive and harmful phenomenon in modern society that affects the functionality and reliability of electronic devices and poses a threat to human health. To address this issue, EMI-shielding materials with high ... ...

    Abstract Electromagnetic interference (EMI) is a pervasive and harmful phenomenon in modern society that affects the functionality and reliability of electronic devices and poses a threat to human health. To address this issue, EMI-shielding materials with high absorption performance have attracted considerable attention. Among various candidates, two-dimensional MXenes are promising materials for EMI shielding due to their high conductivity and tunable surface chemistry. Moreover, by incorporating magnetic and conductive fillers into MXene/polymer composites, the EMI shielding performance can be further improved through structural design and impedance matching. Herein, we provide a comprehensive review of the recent progress in MXene/polymer composites for absorption-dominated EMI shielding applications. We summarize the fabrication methods and EMI shielding mechanisms of different composite structures, such as homogeneous, multilayer, segregated, porous, and hybrid structures. We also analyze the advantages and disadvantages of these structures in terms of EMI shielding effectiveness and the absorption ratio. Furthermore, we discuss the roles of magnetic and conductive fillers in modulating the electrical properties and EMI shielding performance of the composites. We also introduce the methods for evaluating the EMI shielding performance of the materials and emphasize the electromagnetic parameters and challenges. Finally, we provide insights and suggestions for the future development of MXene/polymer composites for EMI shielding applications.
    Language English
    Publishing date 2023-06-20
    Publishing country England
    Document type Journal Article ; Review
    ISSN 2516-0230
    ISSN (online) 2516-0230
    DOI 10.1039/d3na00130j
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  8. Article ; Online: Finite Element Analysis of Unilateral versus Bipedicular Bone-Filling Mesh Container for the Management of Osteoporotic Compression Fractures

    Hui Lu / Qichuan Zhang / Fan Ding / Qimei Wu / Rong Liu

    BioMed Research International, Vol

    2022  Volume 2022

    Abstract: The effect of unilateral and bilateral bone-filling mesh containers (BFC) on osteoporotic vertebral compression fracture (OVCF) was analyzed by the finite element method. The CT scan data of the T12-L2 vertebral body were obtained from a healthy female ... ...

    Abstract The effect of unilateral and bilateral bone-filling mesh containers (BFC) on osteoporotic vertebral compression fracture (OVCF) was analyzed by the finite element method. The CT scan data of the T12-L2 vertebral body were obtained from a healthy female volunteer with no history of lumbar spine injury or obvious abnormality of vertebral body morphology. The normal finite element model of the T12-L2 vertebral body and the finite element model of osteoporosis were established, and the models were validated. The L1 in the normal model of the vertebral body was used to simulate the vertebral compression fracture, after which the unilateral and bilateral BFC were simulated to establish models representing the two surgical approaches. We analyzed changes in the deformation and von Mises stress in vertebral bodies and intervertebral discs in the two models under seven working conditions (axial direction, anteflexion, rear protraction, left-side bending, right-side bending, left rotation, and right rotation) and found that the unilateral and bilateral approaches are biomechanically comparable, with no statistical difference between the two overall models.
    Keywords Medicine ; R
    Subject code 600
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Using mosses and lichen to study roadside pollution and the correlation of toxic elements and elevation in a mountainous area of Guizhou, China

    Haifeng Ding / Zhaohui Zhang / Zhihui Wang / Qimei Wu / Dengfu Wang

    Taiwania, Vol 67, Iss 3, Pp 351-

    2022  Volume 360

    Abstract: In this study, three moss species (Bryum argenteum, Rhynchostegium subspeciosum and Orthotrichum dasymitrium) and one lichen species (Parmelia saxatilis) were sampled to monitor the levels of toxic elements along a section of a gorge road for assessing ... ...

    Abstract In this study, three moss species (Bryum argenteum, Rhynchostegium subspeciosum and Orthotrichum dasymitrium) and one lichen species (Parmelia saxatilis) were sampled to monitor the levels of toxic elements along a section of a gorge road for assessing the enrichment ability of these species and the effects of toxic elements at different elevations. Hierarchical clustering was used to classify samples based on geographic data and ICP-MS to determine the contents of toxic elements in each plant. Based on the obtained levels of enrichment factors (EF), metal accumulation index (MAI) and geoaccumulation index (Igeo), Bryum argenteum (highest MAI and Igeo) was identified as the most suitable biomonitoring species. PMF source analysis showed that the main pollution sources were traffic dust (45%) and other traffic emissions (43%). Road pollution was alarming as high Pb, As and Cr levels were detected as the most important pollutants. The levels of toxic element depositions along the road of the Karst gorge area increased with rising elevation. The vertical distribution of pollutants was affected by temperature, topography, dominant winds and pollutant emissions. However, some variations in the distribution in similar areas were also observed.
    Keywords epiphytes ; mosses and lichen ; toxic elements ; source analysis ; atmospheric contamination ; Biology (General) ; QH301-705.5
    Language English
    Publishing date 2022-06-01T00:00:00Z
    Publisher National Taiwan University
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Hypoxia preconditioned DPSC-derived exosomes regulate angiogenesis via transferring LOXL2.

    Li, Baoyu / Liang, Ailin / Zhou, Yanling / Huang, Yihua / Liao, Chenxi / Zhang, Xufang / Gong, Qimei

    Experimental cell research

    2023  Volume 425, Issue 2, Page(s) 113543

    Abstract: Hypoxia was proved to enhance the angiogenesis of stem cells. However, the mechanism of the angiogenic potential in hypoxia-pretreated dental pulp stem cells (DPSCs) is poorly understood. We previously confirmed that hypoxia enhances the angiogenic ... ...

    Abstract Hypoxia was proved to enhance the angiogenesis of stem cells. However, the mechanism of the angiogenic potential in hypoxia-pretreated dental pulp stem cells (DPSCs) is poorly understood. We previously confirmed that hypoxia enhances the angiogenic potential of DPSC-derived exosomes with upregulation of lysyl oxidase-like 2 (LOXL2). Therefore, our study aimed to illuminate whether these exosomes promote angiogenesis via transfer of LOXL2. Exosomes were generated from hypoxia-pretreated DPSCs (Hypo-Exos) stably silencing LOXL2 after lentiviral transfection and characterized with transmission electron microscopy, nanosight and Western blot. The efficiency of silencing was verified using quantitative real-time PCR (qRT-PCR) and Western blot. CCK-8, scratch and transwell assays were conducted to explore the effects of LOXL2 silencing on DPSCs proliferation and migration. Human umbilical vein endothelial cells (HUVECs) were co-incubated with exosomes to assess the migration and angiogenic capacity through transwell and matrigel tube formation assays. The relative expression of angiogenesis-associated genes was characterized by qRT-PCR and Western blot. LOXL2 was successfully silenced in DPSCs and inhibited DPSC proliferation and migration. LOXL2 silencing in Hypo-Exos partially reduced promotion of HUVEC migration and tube formation and inhibited the expression of angiogenesis-associated genes. Thus, LOXL2 is one of various factors mediating the angiogenic effects of Hypo-Exos.
    MeSH term(s) Humans ; Exosomes/metabolism ; Cell Proliferation/genetics ; Neovascularization, Physiologic/genetics ; Human Umbilical Vein Endothelial Cells ; Stem Cells ; Amino Acid Oxidoreductases/genetics
    Chemical Substances LOXL2 protein, human (EC 1.4.3.-) ; Amino Acid Oxidoreductases (EC 1.4.-)
    Language English
    Publishing date 2023-03-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1493-x
    ISSN 1090-2422 ; 0014-4827
    ISSN (online) 1090-2422
    ISSN 0014-4827
    DOI 10.1016/j.yexcr.2023.113543
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 563: Show issues Location:
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