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  • Wiley  (2)
  • Chen, Zhong  (2)
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  • Wiley  (2)
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  • 1
    In: Advanced Materials Interfaces, Wiley, Vol. 6, No. 17 ( 2019-09)
    Abstract: Polysaccharide is an abundant and reproducible natural material that is biocompatible and biodegradable. Polysaccharide and its derivatives also possess distinctive properties such as hydrophilicity, mechanical stability, as well as tunable functionality. Polysaccharide‐based hydrogels can be constructed via the physical and/or chemical crosslinking of polysaccharide derivatives with different functional molecules, as porous network structures or nanofibrillar structures. This review discusses the biomedical applications of polysaccharide‐based hydrogels containing native polysaccharides, polysaccharide derivatives, and polysaccharide‐composite hydrogels. Recent works on the fabrication, physical properties, advanced engineering, biomedical applications of cellulose‐, chitosan‐, alginate‐, and starch‐based hydrogels are also elaborated. Such porous swelling scaffolds exhibit great advantages at the interface of a negative pressure system such as wound dressing. In addition, the authors also discuss and summarize the exemplary research works of these hydrogels in the applications of drug release, wound dressing, and tissue engineering. Finally, challenges and future perspectives about the development of polysaccharide‐based hydrogels are discussed.
    Type of Medium: Online Resource
    ISSN: 2196-7350 , 2196-7350
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2750376-8
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2015
    In:  Magnetic Resonance in Medicine Vol. 73, No. 4 ( 2015-04), p. 1615-1622
    In: Magnetic Resonance in Medicine, Wiley, Vol. 73, No. 4 ( 2015-04), p. 1615-1622
    Abstract: To investigate the characteristics of nuclear Overhauser enhancement (NOE) imaging signals in the brain at 7T. Methods Fresh hen eggs, as well as six healthy, and six C6 glioma‐bearing Wistar rats were scanned using chemical exchange saturation transfer‐magnetic resonance imaging (CEST‐MRI) and chemical exchange saturation transfer‐magnetic resonance spectroscopy (CEST‐MRS) sequences (saturation duration 3 s, power 1.47 µT) with and without lipid suppression. CEST data were acquired over an offset range of −6 to +6 ppm relative to the water resonance in 0.5 ppm steps. Results The water signals were not disrupted by other protons during the CEST‐MRS sequences, and true NOE signals could be observed. Using the CEST‐MRI sequence without lipid suppression, pseudo NOE imaging signals were observed in the lipid‐containing regions (egg yolk, scalp, and even white matter). These pseudo NOE signals were almost (but incompletely) removed with the lipid suppression. Egg yolk results indicated the presence of the NOE to olefinic protons overlapping with the water signal. In vivo experiments showed that the amide proton transfer signal was larger in the tumor, whereas the NOE signal was larger in the normal white matter. Conclusions True NOE signals can be detected using MRS sequences, and considerable pseudo NOE imaging signals may be observed using MRI sequences. Magn Reson Med 73:1615–1622, 2015. © 2014 Wiley Periodicals, Inc.
    Type of Medium: Online Resource
    ISSN: 0740-3194 , 1522-2594
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 1493786-4
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