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  • 1
    Online Resource
    Online Resource
    Thermo‐ and glucose‐sensitive microgels with improved salt tolerance for controlled insulin release in a physiological environment
    Wiley ; 2018
    In:  Polymer International Vol. 67, No. 9 ( 2018-09), p. 1256-1265
    Details
    In: Polymer International, Wiley, Vol. 67, No. 9 ( 2018-09), p. 1256-1265
    Abstract: The response to temperature and glucose, high salt tolerance and self‐regulated drug delivery are simultaneously probable by applying a multifunctional microgel in a rational design by a colloid chemistry method. Such smart microgels were fabricated with thermoresponsive N ‐isopropylacrylamide, glucose‐sensitive (2‐phenylboronic esters‐1,3‐dioxane‐5‐ethyl)methyl acrylate (PBDEMA) and water‐soluble crosslinker poly(ethylene glycol) diacrylate through a precipitation emulsion method. These colloidal nanoparticles exhibited PBDEMA‐composition‐dependent responsive behavior with changing temperature and ionic strength. Amongst them, the microgel with 20.7 mol% PBDEMA with a narrow size distribution is suitable for diabetes treatment because it can adapt to the surrounding medium of different glucose concentrations over a clinically relevant range (0–2.0 mg mL −1 ), control the release of preloaded insulin and is highly stable under normal physiological conditions. Preliminary experiments suggest these highly stable microgels have the potential to be used for self‐regulated therapy and monitoring the response to treatment. © 2018 Society of Chemical Industry
    Type of Medium: Online Resource
    ISSN: 0959-8103 , 1097-0126
    URL: Issue
    URL: Article
    DOI: 10.1002/pi.2018.67.issue-9
    DOI: 10.1002/pi.5634
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2004753-8
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  • 2
    Online Resource
    Online Resource
    Feasibility and Reproducibility of Multifrequency Magnetic Resonance Elastography in Healthy and Diseased Pancreases
    Wiley ; 2022
    In:  Journal of Magnetic Resonance Imaging Vol. 56, No. 6 ( 2022-12), p. 1769-1780
    Details
    In: Journal of Magnetic Resonance Imaging, Wiley, Vol. 56, No. 6 ( 2022-12), p. 1769-1780
    Abstract: The feasibility and reproducibility of multifrequency MR elastography (MRE) for diagnosing pancreatic ductal adenocarcinoma (PDAC) have not been reported. Purpose To determine the feasibility and reproducibility of multifrequency MRE for assessing pancreatic stiffness in healthy and diseased pancreases. Study type Prospective. Subjects A total of 40 healthy volunteers and 10 patients with PDAC were prospectively recruited between March 2018 and October 2021. Field strength/sequence A 3. 0‐T pancreatic MRE at frequencies in the order of 30, 40, 60, 80, and 100 Hz. Assessment Body mass index (BMI) and wave distance of the healthy pancreas and PDAC were measured. Image quality was assessed using the image quality score (IQS: 1–4, ≥3 were considered diagnostic quality). Three readers independently performed the pancreatic stiffness and IQS assessments to evaluate reproducibility. Statistical tests Logistic regression analyses were performed to determine variables that influenced IQS. Statistical significance was set at P   〈 0.05. Levels of inter‐ and intrarater agreement were assessed using intraclass correlation coefficients (ICC) and Cohen's kappa coefficient (κ). Good reproducibility was set at ICC and κ ≥ 0.8. Results In logistic regression analysis, a diagnostic IQS in healthy volunteers was independently associated with a lower BMI (odds ratio [OR] = 0.89 kg/m −2 ), shorter wave distance (OR = 0.70 cm −1 ), and lower frequency (30 and 40 Hz: OR = 170.01 and 96.02). In PDAC, frequency was the only independent factor for diagnostic IQS (30–60 Hz: OR = 46.18, 46.18, and 17.20, respectively) with 100 Hz as a reference. In healthy volunteers, good reproducibility was observed at 30 and 40 Hz. In PDAC, good reproducibility was observed at 30–60 Hz. Data conclusion MRE at 30 and 40 Hz provides diagnostic wave images and reliable measurements of pancreatic stiffness in healthy volunteers. MRE at 30–60 Hz is acceptable for PDACs (IQS ≥ 3, ICC and κ ≥ 0.80). Evidence Level 1 Technical Efficacy Stage 2
    Type of Medium: Online Resource
    ISSN: 1053-1807 , 1522-2586
    URL: Issue
    URL: Article
    DOI: 10.1002/jmri.v56.6
    DOI: 10.1002/jmri.28158
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1497154-9
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  • 3
    Online Resource
    Online Resource
    Well‐Aligned Hierarchical Graphene‐Based Electrodes for Pseudocapacitors with Outstanding Low‐Temperature Stability
    Wiley ; 2019
    In:  ChemElectroChem Vol. 6, No. 10 ( 2019-05-15), p. 2788-2795
    Details
    In: ChemElectroChem, Wiley, Vol. 6, No. 10 ( 2019-05-15), p. 2788-2795
    Abstract: The relatively poor performance stability of pseudocapacitors over a wide temperature window (i. e. temperature stability), particularly at low temperatures, hinders their practical applications. Here, well‐aligned hierarchical pseudocapacitive electrodes are fabricated, featuring run‐through channels in a graphene network (GN) as ion‐buffering reservoirs, open inter‐sheet channels between vertical graphene nanosheets (VGNSs) for fast ion transport and MnO 2 nanopetals on VGNSs for efficient interfacial pseudocapacitive reactions. With reduced ion diffusion length and charge‐transfer resistance as well as improved ion‐transport rate, the capacitance of pseudocapacitive electrodes decreases from 541 to 490 F g −1 at 1 A g −1 as the temperature drops from 25 to 0 °C, revealing a high capacitance retention of 90.7 %. Furthermore, the specific capacitance of a symmetric device based on the hierarchical electrodes at −30 °C maintains 80.8 % of the room‐temperature capacitance. Such outstanding temperature stability is comparable to the state‐of‐the‐art electric double‐layer capacitors. Importantly, 86.0 % of capacitance is retained after repeated heating and cooling at temperatures ranging from −30 to 60 °C for 5000 cycles. Asymmetric supercapacitors with the hierarchical architecture in the positive electrode exhibit stable performance over a wide temperature range. These results demonstrate the rationality of the electrode design for practical energy storage applications in harsh temperature environments.
    Type of Medium: Online Resource
    ISSN: 2196-0216 , 2196-0216
    URL: Issue
    URL: Article
    DOI: 10.1002/celc.v6.10
    DOI: 10.1002/celc.201900601
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2724978-5
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  • 4
    Online Resource
    Online Resource
    Chinese Loess Plateau vegetation since the Last Glacial Maximum and its implications for vegetation restoration
    Wiley ; 2013
    In:  Journal of Applied Ecology Vol. 50, No. 2 ( 2013-04), p. 440-448
    Details
    In: Journal of Applied Ecology, Wiley, Vol. 50, No. 2 ( 2013-04), p. 440-448
    Type of Medium: Online Resource
    ISSN: 0021-8901
    URL: Article
    DOI: 10.1111/1365-2664.12052
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020408-5
    detail.hit.zdb_id: 410405-5
    SSG: 12
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  • 5
    Online Resource
    Online Resource
    Inhibition effect of polyvinyl chloride on ferrihydrite reduction and electrochemical activities of Geobacter metallireducens
    Wiley ; 2020
    In:  Journal of Basic Microbiology Vol. 60, No. 1 ( 2020-01), p. 37-46
    Details
    In: Journal of Basic Microbiology, Wiley, Vol. 60, No. 1 ( 2020-01), p. 37-46
    Abstract: Geobacter metallireducens GS15, a model of dissimilatory iron‐reducing bacteria, is the key regulator in biogeochemical iron cycling. How the emerging contaminant microplastics involved in the iron cycling are driven by microbes on the microscale remains unknown. Hence, the influences of two typical microplastics, polybutylene terephthalate‐hexane acid (PBAT) and polyvinyl chloride (PVC), were explored on the activity of G. metallireducens GS15 with ferrihydrite or ferric citrate as the respective electron acceptors. The results showed that the iron (II) contents in PBAT‐ and PVC‐treatment groups were 16.79 and 6.81 mM, respectively, at the end of the experiment. Compared with the PBAT‐treatment group, scanning electron microscopy and energy dispersive spectrometery revealed that merely a small amount of iron‐containing products covered the surface of PVC. Moreover, PBAT and PVC could both retard the electroactivity of G. metallireducens GS15 at the beginning of microbial fuel cell operation. On the basis of the results above, microplastic PVC might exhibit potential inhibition of the iron cycling process driven by G. metallireducens GS15 with ferrihydrite as the terminal electron acceptor. This study extended our understanding of the influence of the microplastics PBAT and PVC on microbially mediated biogeochemical iron cycling. The findings might have an important implication on the biogeochemical elements cycling in the ecosystem with the involvement of emerging contaminant microplastics.
    Type of Medium: Online Resource
    ISSN: 0233-111X , 1521-4028
    URL: Issue
    URL: Article
    DOI: 10.1002/jobm.v60.1
    DOI: 10.1002/jobm.201900415
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1480967-9
    detail.hit.zdb_id: 632513-0
    detail.hit.zdb_id: 203025-1
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Synthesis of a core–shell polyacrylate elastomer containing ultraviolet stabilizer and its application in polyoxymethylene
    Wiley ; 2012
    In:  Polymer Engineering & Science Vol. 52, No. 11 ( 2012-11), p. 2403-2409
    Details
    In: Polymer Engineering & Science, Wiley, Vol. 52, No. 11 ( 2012-11), p. 2403-2409
    Abstract: A core–shell polyacrylate elastomer containing ultraviolet (UV) stabilizer was synthesized via semicontinuous seeded emulsion polymerization from butyl acrylate (BA), methyl methacrylate (MMA), and a polymerizable UV stabilizer 2‐hydroxy‐4‐(3‐methacryloxy‐2‐hydroxylproroxy)benzophenone (BPMA). The core–shell poly(MMA‐BA‐BPMA) was investigated by Fourier transform infrared spectroscopy, gel permeation chromatography UV–visible (UV–vis) absorption spectroscopy, and transmission electron microscope. Furthermore, the obtained core–shell poly(MMA‐BA‐BPMA) elastomer was used as a modifier to enhance the UV resistance and impact resistance of polyoxymethylene (POM). As studied by scanning electron microscope, the core–shell poly(BA‐MMA‐BPMA) elastomer could be well dispersed in POM matrix, indicating that the elastomer had good compatibility with POM. In addition, the POM/poly(MMA‐BA‐BPMA) blend was examined by differential scanning calorimetry before and after UV irradiation. The results showed that the melting point decreased as the irradiation time increased; however, the crystallinity culminated at 500‐h UV irradiation slightly decreased and at last leveled off. The mechanical properties of POM/poly(BA‐MMA‐BPMA) before and after UV irradiation were also studied. It revealed that the photostabilizing fragments in the elastomer could provide long‐term UV resistance to POM. Besides, the impact strength was also improved when compared with pure POM. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers
    Type of Medium: Online Resource
    ISSN: 0032-3888 , 1548-2634
    URL: Issue
    URL: Article
    DOI: 10.1002/pen.v52.11
    DOI: 10.1002/pen.23194
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 2006718-5
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  • 7
    Online Resource
    Online Resource
    In Situ Gas–Solid Reaction and Oxidation Resistance of Silicon Carbide Coating on Carbon Fibers
    Wiley ; 2016
    In:  Journal of the American Ceramic Society Vol. 99, No. 5 ( 2016-05), p. 1823-1829
    Details
    In: Journal of the American Ceramic Society, Wiley, Vol. 99, No. 5 ( 2016-05), p. 1823-1829
    Abstract: Silicon carbide (SiC) coating on carbon fibers was realized based on in situ low‐temperature gas–solid reaction processing in which carbon reacted with Si vapor at the temperature of 1200°C–1300°C. X‐ray diffraction ( XRD ), field‐emission scanning electron microscopy ( FE ‐ SEM ), and energy‐dispersive spectroscopy ( EDS ) analysis showed that the SiC coating was uniform and crystallized by beta‐SiC. The oxidation resistant properties of the SiC‐coated carbon fibers were significantly improved according to isothermal oxidation measurement. The initial oxidation temperature of the SiC‐coated carbon fibers was about 200°C higher than that of the raw carbon fibers. The SiC‐coating carbon fibers treated at 1250°C possessed higher antioxidant property than the one treated at 1300°C.
    Type of Medium: Online Resource
    ISSN: 0002-7820 , 1551-2916
    URL: Issue
    URL: Article
    DOI: 10.1111/jace.2016.99.issue-5
    DOI: 10.1111/jace.14179
    RVK:
    VA 1120
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2008170-4
    detail.hit.zdb_id: 219232-9
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  • 8
    Online Resource
    Online Resource
    Synthesis of an acrylate elastomer with UV stabilization and its application in polyoxymethylene
    Wiley ; 2012
    In:  Journal of Applied Polymer Science Vol. 123, No. 5 ( 2012-03-05), p. 2609-2615
    Details
    In: Journal of Applied Polymer Science, Wiley, Vol. 123, No. 5 ( 2012-03-05), p. 2609-2615
    Type of Medium: Online Resource
    ISSN: 0021-8995
    URL: Issue
    URL: Article
    DOI: 10.1002/app.v123.5
    DOI: 10.1002/app.34482
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 1491105-X
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  • 9
    Online Resource
    Online Resource
    Preparation of core–shell nanoparticle‐based hindered amine stabilizer and its application in polyoxymethylene
    Wiley ; 2012
    In:  Journal of Applied Polymer Science Vol. 126, No. 4 ( 2012-11-15), p. 1291-1299
    Details
    In: Journal of Applied Polymer Science, Wiley, Vol. 126, No. 4 ( 2012-11-15), p. 1291-1299
    Abstract: Core–shell nanoparticles chemically functionalized by hindered amine stabilizer (HAS), poly(BA‐MMA‐ co ‐PMPA) (PBMP), were prepared by two‐stage emulsion polymerization from butyl acrylate, methyl methacrylate, and 1,2,2,6,6‐pentamethylpiperidin‐4‐yl acrylate. The incorporation of HAS into the particles was confirmed by nuclear magnetic resonance ( 1 H‐NMR) and the core–shell microstructure of PBMP particles was revealed by transmission electron microscopy. Furthermore, PBMP capable of one‐step toughening and photostabilizing, was melt‐blended with polyoxymethylene (POM), and its dispersion in POM was investigated by scanning electron microscope. The results showed that the core–shell nanoparticles could be well dispersed in POM matrix, indicating its good compatibility with POM. The UV resistance and impact resistance of POM were obviously improved by the HAS‐functional core–shell nanoparticles simultaneously. In addition, the core–shell nanoparticles could confer excellent protection to the surface of POM from UV‐light damage, regardless of the adverse effects on the thermal‐oxidative stability of POM, as investigated by thermogravimetry analysis under aerobic condition. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
    Type of Medium: Online Resource
    ISSN: 0021-8995 , 1097-4628
    URL: Issue
    URL: Article
    DOI: 10.1002/app.v126.4
    DOI: 10.1002/app.36923
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 1491105-X
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  • 10
    Online Resource
    Online Resource
    Density Functional Theory Investigation on the Second-Order Nonlinear Optical Properties of Chlorobenzyl- o -Carborane Derivatives
    Wiley ; 2012
    In:  Chinese Journal of Chemistry Vol. 30, No. 10 ( 2012-10), p. 2349-2355
    Details
    In: Chinese Journal of Chemistry, Wiley, Vol. 30, No. 10 ( 2012-10), p. 2349-2355
    Type of Medium: Online Resource
    ISSN: 1001-604X
    URL: Article
    DOI: 10.1002/cjoc.201200514
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 2144352-X
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