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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of polycarbonates based on bisphenol S by melt transesterification (1997)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 35 (1997), S. 2453-2460 
    Details
    ISSN: 0887-624X
    Keywords: polycarbonate, bisphenol S ; melt transesterification ; diphenyl carbonate ; oxyethylene ; inherent viscosity ; solubility ; tensile strength ; contact angle ; DSC ; TGA ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Several sulfone-containing polycarbonates, having inherent viscosity 0.25-0.30 dL g-1 in N,N-dimethylformamide (DMF), were prepared by melt polycondensation of diphenyl carbonate (DPC) with various aromatic and aliphatic diols, in the presence of zinc acetate as transesterification catalyst. The polycarbonates were examined with IR spectra, inherent viscosity, solubility, tensile strength, contact angle, DSC and TGA. Almost all polymers were soluble in DMF, pyridine, N-methyl pyrrolidinone (NMP), THF, phenol and dimethylsulfoxide (DMSO), partially soluble in nitrobenzene, but insoluble in acetone. Polycarbonate with introduced ether linkages leads to enhanced flexibility and elongation strength. The contact angle of the polycarbonate based on bisphenol S was found in the range 42-80°, smaller than that of polycarbonates based on bisphenol AF and bisphenol A. The wettability of polycarbonate films based on bisphenol S remarkably increased with increasing oxyethylene unit in polymer chain. The smaller values of Td of PC-3-PC-7 than of PC-1 is attributed to the flexible ether linkage. The thermal stability of a brominated aromatic polycarbonate (PC-2) is less than that of the unbrominated one (PC-1). The brominated aromatic polycarbonate (PC-2) has good flame retardency, as indicated by the large limiting oxygen index 56. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 2453-2460, 1997
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Light microscopy of the pineal organ of two primitive lizards, Platyurus platyurus and Hemidactylus frenatus (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 206 (1983), S. 283-288 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1092060306
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Western boundary currents regulated by interaction between ocean eddies and the atmosphere (2016)
    Nature Research
    In:  Nature, 535 (7613). pp. 533-537.
    Details
    Publication Date: 2019-09-23
    Description: Current climate models systematically underestimate the strength of oceanic fronts associated with strong western boundary currents, such as the Kuroshio and Gulf Stream Extensions, and have difficulty simulating their positions at the mid-latitude ocean’s western boundaries1. Even with an enhanced grid resolution to resolve ocean mesoscale eddies—energetic circulations with horizontal scales of about a hundred kilometres that strongly interact with the fronts and currents—the bias problem can still persist2; to improve climate models we need a better understanding of the dynamics governing these oceanic frontal regimes. Yet prevailing theories about the western boundary fronts are based on ocean internal dynamics without taking into consideration the intense air–sea feedbacks in these oceanic frontal regions. Here, by focusing on the Kuroshio Extension Jet east of Japan as the direct continuation of the Kuroshio, we show that feedback between ocean mesoscale eddies and the atmosphere (OME-A) is fundamental to the dynamics and control of these energetic currents. Suppressing OME-A feedback in eddy-resolving coupled climate model simulations results in a 20–40 per cent weakening in the Kuroshio Extension Jet. This is because OME-A feedback dominates eddy potential energy destruction, which dissipates more than 70 per cent of the eddy potential energy extracted from the Kuroshio Extension Jet. The absence of OME-A feedback inevitably leads to a reduction in eddy potential energy production in order to balance the energy budget, which results in a weakened mean current. The finding has important implications for improving climate models’ representation of major oceanic fronts, which are essential components in the simulation and prediction of extratropical storms and other extreme events3, 4, 5, 6, as well as in the projection of the effect on these events of climate change.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1038/nature18640
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Heteronemin is a novel c-Met/STAT3 inhibitor against advanced prostate cancer cells (2016)
    Wiley-Blackwell
    In: Prostate
    Details
    Publication Date: 2016-07-16
    Description: BACKGROUND Prostate cancer is one of the most prevalent cancers in men worldwide. Aberrant activation of c-Met/signal transducer and activator of transcription-3 (STAT3) signaling is involved in prostate carcinogenesis, underscoring the demand for developing c-Met/STAT3-targeting drugs. Thus, we first utilized virtual screening strategy to identify STAT3-inhibiting marine compound, heteronemin, and then validated the STAT3-inhibiting function of heteronemin in prostate cancer cells. METHODS Human prostate cancer LNCaP, DU145, and PC-3 cell lines were treated with heteronemin for 24 hr, then the cell viability was evaluated by MTT assay. Flow cytometry was performed to analyze the apoptosis in heteronemin-treated cells. Western blot and quantitative real-time PCR were executed to further confirm the c-Met/STAT3 signaling inhibition by heteronemin in DU145 and PC-3 cells. RESULTS In this study, we employed the virtual screening strategy to identify heteronemin, a spongean sesterterpene, as a potential STAT3 inhibitor from Taiwan marine drugs library. Application of heteronemin potently suppressed the viability and anchorage-independent growth of human prostate cancer cells. Besides, heteronemin induced apoptosis in prostate cancer cells by activation of both intrinsic (caspase-9) and extrinsic (caspase-8) apoptotic pathways. By luciferase assay and expression analysis, it was confirmed that heteronemin inhibited the phosphorylation of c-Met/src/STAT3 signaling axis, STAT3-driven luciferase activities and expression of STAT3-regulated genes including Bcl-xL, Bcl-2, and Cyclin D1. Finally, heteronemin effectively antagonized the hepatocyte growth factor (HGF)-stimulated c-Met/STAT3 activation as well as the proliferation and colonies formation in refractory prostate cancer cells. CONCLUSIONS These findings suggest that heteronemin may constitute a novel c-Met/STAT3-targeting agent for prostate cancer. Prostate © 2016 Wiley Periodicals, Inc.
    Print ISSN: 0270-4137
    Electronic ISSN: 1097-0045
    Topics: Medicine
    Published by Wiley-Blackwell
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    PAPER CURRENT
  • 5
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    Preparation and magnetic properties of CoWO4 nanocrystals (2012)
    Wiley-Blackwell
    Details
    Publication Date: 2012-07-05
    Description: Cobalt tungstate (CoWO 4 ) nanocrystals with an average size of 20–50 nm were synthesized via a template- or surfactant-free hydrothermal route. The crystal structure and morphology of the as-synthesized CoWO 4 sample were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Magnetic measurements on the as-synthesized CoWO 4 nanocrystals indicate a Néel temperature ( T N ) of ∼40 K. This lower T N may be a result of the nanostructured particles that reduce the exchange coupling. The new synthetic route presented in this paper has potential applications to fabricate other metal tungstates (MWO 4 ) materials.
    Print ISSN: 0232-1300
    Electronic ISSN: 1521-4079
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell
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    PAPER CURRENT
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