@article{BakirciFrankGumbeletal.2021,
  author    = {Bakirci, Ezgi and Frank, Andreas and Gumbel, Simon and Otto, Paul F. and F{\"u}rsattel, Eva and Tessmer, Ingrid and Schmidt, Hans-Werner and Dalton, Paul D.},
  title     = {Melt Electrowriting of Amphiphilic Physically Crosslinked Segmented Copolymers},
  series = {Macromolecular Chemistry and Physics},
  volume    = {222},
  journal   = {Macromolecular Chemistry and Physics},
  number    = {22},
  doi       = {10.1002/macp.202100259},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-257572},
  year      = {2021},
  abstract  = {Various (AB)\(_{n}\) and (ABAC)\(_{n}\) segmented copolymers with hydrophilic and hydrophobic segments are processed via melt electrowriting (MEW). Two different (AB)\(_{n}\) segmented copolymers composed of bisurea segments and hydrophobic poly(dimethyl siloxane) (PDMS) or hydrophilic poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) (PPO-PEG-PPO) segments, while the amphiphilic (ABAC)\(_{n}\) segmented copolymers consist of bisurea segments in the combination of hydrophobic PDMS segments and hydrophilic PPO-PEG-PPO segments with different ratios, are explored. All copolymer compositions are processed using the same conditions, including nozzle temperature, applied voltage, and collector distance, while changes in applied pressure and collector speed altered the fiber diameter in the range of 7 and 60 µm. All copolymers showed excellent processability with MEW, well-controlled fiber stacking, and inter-layer bonding. Notably, the surfaces of all four copolymer fibers are very smooth when visualized using scanning electron microscopy. However, the fibers show different roughness demonstrated with atomic force microscopy. The non-cytotoxic copolymers increased L929 fibroblast attachment with increasing PDMS content while the different copolymer compositions result in a spectrum of physical properties.},
  language  = {en}
}
@article{KadeOttoLuxenhoferetal.2021,
  author    = {Kade, Juliane C. and Otto, Paul F. and Luxenhofer, Robert and Dalton, Paul D.},
  title     = {Melt electrowriting of poly(vinylidene difluoride) using a heated collector},
  series = {Polymers for Advanced Technologies},
  volume    = {32},
  journal   = {Polymers for Advanced Technologies},
  number    = {12},
  issn      = {1042-7147},
  doi       = {10.1002/pat.5463},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-318493},
  pages     = {4951 -- 4955},
  year      = {2021},
  abstract  = {Previous research on the melt electrowriting (MEW) of poly(vinylidene difluoride) (PVDF) resulted in electroactive fibers, however, printing more than five layers is challenging. Here, we investigate the influence of a heated collector to adjust the solidification rate of the PVDF jet so that it adheres sufficiently to each layer. A collector temperature of 110°C is required to improve fiber processing, resulting in a total of 20 fiber layers. For higher temperatures and higher layers, an interesting phenomenon occurred, where the intersection points of the fibers coalesced into periodic spheres of diameter 206 ± 52 μm (26G, 150°C collector temperature, 2000 mm/min, 10 layers in x- and y-direction).The heated collector is an important component of a MEW printer that allows polymers with a high melting point to be processable with increased layers.},
  language  = {en}
}
@article{RennerOttoKuebleretal.2023,
  author    = {Renner, Tobias and Otto, Paul and K{\"u}bler, Alexander C. and H{\"o}lscher-Doht, Stefanie and Gbureck, Uwe},
  title     = {Novel adhesive mineral-organic bone cements based on phosphoserine and magnesium phosphates or oxides},
  series = {Journal of Materials Science: Materials in Medicine},
  volume    = {34},
  journal   = {Journal of Materials Science: Materials in Medicine},
  doi       = {10.1007/s10856-023-06714-6},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-357342},
  year      = {2023},
  abstract  = {Present surgical situations require a bone adhesive which has not yet been developed for use in clinical applications. Recently, phosphoserine modified cements (PMC) based on mixtures of o-phosphoserine (OPLS) and calcium phosphates, such as tetracalcium phosphate (TTCP) or α-tricalcium phosphate (α-TCP) as well as chelate setting magnesium phosphate cements have gained increasing popularity for their use as mineral bone adhesives. Here, we investigated new mineral-organic bone cements based on phosphoserine and magnesium phosphates or oxides, which possess excellent adhesive properties. These were analyzed by X-ray diffraction, Fourier infrared spectroscopy and electron microscopy and subjected to mechanical tests to determine the bond strength to bone after ageing at physiological conditions. The novel biomineral adhesives demonstrate excellent bond strength to bone with approximately 6.6-7.3 MPa under shear load. The adhesives are also promising due to their cohesive failure pattern and ductile character. In this context, the new adhesive cements are superior to currently prevailing bone adhesives. Future efforts on bone adhesives made from phosphoserine and Mg2+ appear to be very worthwhile.},
  language  = {en}
}
@article{HussHalbgebauerOeckletal.2016,
  author    = {Huss, Andr{\´e} M. and Halbgebauer, Steffen and {\"O}ckl, Patrick and Trebst, Corinna and Spreer, Annette and Borisow, Nadja and Harrer, Andrea and Brecht, Isabel and Balint, Bettina and Stich, Oliver and Schlegel, Sabine and Retzlaff, Nele and Winkelmann, Alexander and Roesler, Romy and Lauda, Florian and Yildiz, {\"O}zlem and Voß, Elke and Muche, Rainer and Rauer, Sebastian and Bergh, Florian Then and Otto, Markus and Paul, Friedemann and Wildemann, Brigitte and Kraus, J{\"o}rg and Ruprecht, Klemens and Stangel, Martin and Buttmann, Mathias and Zettl, Uwe K. and Tumani, Hayrettin},
  title     = {Importance of cerebrospinal fluid analysis in the era of McDonald 2010 criteria: a German-Austrian retrospective multicenter study in patients with a clinically isolated syndrome},
  series = {Journal of Neurology},
  volume    = {263},
  journal   = {Journal of Neurology},
  number    = {12},
  doi       = {10.1007/s00415-016-8302-1},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-186619},
  pages     = {2499-2504},
  year      = {2016},
  abstract  = {The majority of patients presenting with a first clinical symptom suggestive of multiple sclerosis (MS) do not fulfill the MRI criteria for dissemination in space and time according to the 2010 revision of the McDonald diagnostic criteria for MS and are thus classified as clinically isolated syndrome (CIS). To re-evaluate the utility of cerebrospinal fluid (CSF) analysis in the context of the revised McDonald criteria from 2010, we conducted a retrospective multicenter study aimed at determining the prevalence and predictive value of oligoclonal IgG bands (OCBs) in patients with CIS. Patients were recruited from ten specialized MS centers in Germany and Austria. We collected data from 406 patients; at disease onset, 44/406 (11 \%) fulfilled the McDonald 2010 criteria for MS. Intrathecal IgG OCBs were detected in 310/362 (86 \%) of CIS patients. Those patients were twice as likely to convert to MS according to McDonald 2010 criteria as OCB-negative individuals (hazard ratio = 2.1, p = 0.0014) and in a shorter time period of 25 months (95 \% CI 21-34) compared to 47 months in OCB-negative individuals (95 \% CI 36-85). In patients without brain lesions at first attack and presence of intrathecal OCBs (30/44), conversion rate to MS was 60 \% (18/30), whereas it was only 21 \% (3/14) in those without OCBs. Our data confirm that in patients with CIS the risk of conversion to MS substantially increases if OCBs are present at onset. CSF analysis definitely helps to evaluate the prognosis in patients who do not have MS according to the revised McDonald criteria.},
  language  = {en}
}