Filters

20204

More filters

2020 - 20234
Reset filters

Settings

End date: 2024 × Start date: 2020 × End date: 2020 × Start date: 2020 × Has files: Yes × Publisher: Berlin : De Gruyter ×

Search Results

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Detecting Bacteria on Wounds with Hyperspectral Imaging in Fluorescence Mode
    (Berlin : De Gruyter, 2020) Hornberger, Christoph.; Herrmann, Bert. H.; Daeschlein, Georg; Podewils, Sebastian von; Sicher, Claudia; Kuhn, Jana; Masur, Kai; Meister, Mareike; Wahl, Philip
    Chronic non-healing wounds represent an increasing problem. In order to enable physicians and nurses to make evidence based decisions on wound treatment, the professional societies call for supporting tools to be offered to physicians. Oxygen supply, bacteria colonization and other parameters influence the healing process. So far, these parameters cannot be monitored in an objective and routinely manner. Existing methods like the microbiological analysis of wound swabs, mean a great deal of effort and partly a long delay. In this paper 42 fluorescence images from 42 patients with diabetic foot ulcer, recorded with a hyperspectral imaging system (TIVITA®), converted for fluorescence imaging, were analysed. Beside the fluorescence images, information about the bacterial colonization is available from microbiological analysis of wound swabs. After preprocessing, principal component analysis, PCA, is used for data analysis with a 405 nm excitation wavelength, the emission wavelength range 510 - 745 nm is used for analysis. After dividing the data into a training and a test dataset it could be shown, that bacteria are detectable in the wound area. A quantification in bacterial colonization counts (BCC) was not in the focus of the research in this study stage.
  • Thumbnail Image
    Item
    Open Access im Blick! Mehr Sichtbarkeit von Open-Access-Publikationen in der Bibliothek – Projekt visOA
    (Berlin : De Gruyter, 2020) Geith, Uwe; Kraß, Thomas
    In order to bring Open Access publications more into the perception of library users, it is necessary to make them more visible. In the visOA project, carried out by the NTNM library of the INM, Open Access publications were clearly highlighted in the OPAC as well as in the Discovery System and in the publication lists of the INM. A self-programmed virtual journal display (VIDIJO) also offers a subject-specific selection of Open Access journals. The effectiveness of the measures taken in the project was verified by accompanying research.
  • Thumbnail Image
    Item
    Hydrophobic multiscale cavities for high-performance and self-cleaning surface-enhanced Raman spectroscopy (SERS) sensing
    (Berlin : De Gruyter, 2020) Zhao, Xiaofei; Liu, Chundong; Yu, Jing; Liu, Lu; Li, Chonghui; Xu, Shicai; Li, Weifeng; Man, Baoyuan; Zhang, Chao
    Cavity array, with excellent optical capture capability, has received increasing attention for the surface-enhanced Raman spectroscopy (SERS)-active substrates. Here, we proposed molybdenum disulfide (MoS2) nanocavities growing on pyramid Si (PSi) composed of in situ reduced Au nanoparticles (AuNPs), which can form the multiscale cavities (MSCs), and is facile for the couple of the plasmon. We demonstrated that the PSi/MoS2/Au MSCs can serve as highly sensitive, uniform, and stable SERS substrates for rhodamine 6G (R6G), crystal violet, and adenosine triphosphate detection, benefiting from the synergistic effect of the enhanced light trapping and the effective plasmonic couple. The couple of the plasmon in the MSCs is evidently proved by finite-difference time domain simulation, showing the strong electromagnetic field is located around the cavity wall. Moreover, the excellent hydrophobicity of the PSi/MoS2/AuNPs substrate endows it with the ability for the directional monitoring of organic pollutant in a mixture of oil and water. Finally, we demonstrated the MSCs with outstanding photocatalytic performance could achieve the renewable utilization by self-cleaning, which was attributed to the fast electron transfer and effective light absorption. The proposed PSi/MoS2/AuNPs MSC represents a robust mean using the plasmonic metal/semiconductor heterostructure for high-performance SERS sensors and photodegradation.
  • Thumbnail Image
    Item
    Messanlage zur Untersuchung des Seebeck-Effektes in Polymermaterialien
    (Berlin : De Gruyter, 2020) Jenschke, Wolfgang; Ullrich, Mathias; Krause, Beate; Pötschke, Petra
    The thermoelectric effect named after the physicist Thomas Johann Seebeck has been investigated sufficiently well for all technically relevant metals and has been used for a long time, among other things, for temperature measurement by means of thermocouples. Less well known and researched is the Seebeck effect in polymer materials, which are gaining increasing influence in the sensor industry today. This article describes a measuring system designed specifically to study the Seebeck effect in polymeric samples with the aim of developing tailored polymers for sensory engineering applications using the Seebeck effect. The special requirement of the measuring system is the realization of constant accurate temperature sources.