@article{OehlenschlaegerVolkmarStiefelmaieretal.2024,
  author    = {Oehlenschl{\"a}ger, Katharina and Volkmar, Marianne and Stiefelmaier, Judith and Langsdorf, Alexander and Holtmann, Dirk and Tippk{\"o}tter, Nils and Ulber, Roland},
  title     = {New insights into the influence of pre-culture on robust solvent production of C. acetobutylicum},
  series = {Applied Microbiology and Biotechnology},
  volume    = {108},
  journal   = {Applied Microbiology and Biotechnology},
  publisher = {Springer},
  address   = {Berlin, Heidelberg},
  issn      = {1432-0614},
  doi       = {10.1007/s00253-023-12981-8},
  pages     = {10 Seiten},
  year      = {2024},
  abstract  = {Clostridia are known for their solvent production, especially the production of butanol. Concerning the projected depletion of fossil fuels, this is of great interest. The cultivation of clostridia is known to be challenging, and it is difficult to achieve reproducible results and robust processes. However, existing publications usually concentrate on the cultivation conditions of the main culture. In this paper, the influence of cryo-conservation and pre-culture on growth and solvent production in the resulting main cultivation are examined. A protocol was developed that leads to reproducible cultivations of Clostridium acetobutylicum. Detailed investigation of the cell conservation in cryo-cultures ensured reliable cell growth in the pre-culture. Moreover, a reason for the acid crash in the main culture was found, based on the cultivation conditions of the pre-culture. The critical parameter to avoid the acid crash and accomplish the shift to the solventogenesis of clostridia is the metabolic phase in which the cells of the pre-culture were at the time of inoculation of the main culture; this depends on the cultivation time of the pre-culture. Using cells from the exponential growth phase to inoculate the main culture leads to an acid crash. To achieve the solventogenic phase with butanol production, the inoculum should consist of older cells which are in the stationary growth phase. Considering these parameters, which affect the entire cultivation process, reproducible results and reliable solvent production are ensured.},
  language  = {en}
}
@inproceedings{SchneiderAlHakimKayseretal.2017,
  author    = {Schneider, Oliver and Al Hakim, Taher and Kayser, Peter and Digel, Ilya},
  title     = {Development and trials of a test chamber for ultrasound-assisted sampling of living cells from solid surfaces},
  series = {2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West},
  booktitle = {2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West},
  editor    = {Erni, Daniel and Fischerauer, Alice and Himmel, J{\"o}rg and Seeger, Thomas and Thelen, Klaus},
  publisher = {Universit{\"a}t Duisburg-Essen},
  address   = {Duisburg},
  organization    = {MedTech Symposium},
  isbn      = {978-3-9814801-9-1},
  doi       = {10.17185/duepublico/43984},
  pages     = {96 -- 97},
  year      = {2017},
  language  = {en}
}
@inproceedings{BirgelLeschingerWegmannetal.2017,
  author    = {Birgel, Stefan and Leschinger, Tim and Wegmann, Kilian and Staat, Manfred},
  title     = {Calculation of muscle forces and joint reaction loads in shoulder area via an OpenSim based computer calculation},
  series = {2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West},
  booktitle = {2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West},
  editor    = {Erni, Daniel and Fischerauer, Alice and Himmel, J{\"o}rg and Seeger, Thomas and Thelen, Klaus},
  publisher = {Universit{\"a}t Duisburg-Essen},
  address   = {Duisburg},
  organization    = {MedTech Symposium},
  isbn      = {978-3-9814801-9-1},
  doi       = {10.17185/duepublico/43984},
  pages     = {116 -- 117},
  year      = {2017},
  language  = {en}
}
@inproceedings{KalbeKuropkaMeyerStorketal.1988,
  author    = {Kalbe, Jochen and Kuropka, Rolf and Meyer-Stork, L. Sebastian and Lauter, S. L. and H{\"o}cker, Hartwig and Berndt, Heinz},
  title     = {Identification of fine animal hair via DNA analysis},
  series = {Proceedings of the 1st International Symposium on Specialty Animal Fibers : Aachen, October 26 - 27, 1987 ; [scientific, technological and economical aspects] . - (Schriftenreihe des Deutschen Wollforschungsinstitutes an der Technischen Hochschule Aachen e.V. ; 103)},
  booktitle = {Proceedings of the 1st International Symposium on Specialty Animal Fibers : Aachen, October 26 - 27, 1987 ; [scientific, technological and economical aspects] . - (Schriftenreihe des Deutschen Wollforschungsinstitutes an der Technischen Hochschule Aachen e.V. ; 103)},
  editor    = {K{\"o}rner, Andrea},
  publisher = {Dt. Wollforschungsinst.},
  address   = {Aachen},
  issn      = {0930-3723},
  pages     = {221 -- 227},
  year      = {1988},
  language  = {en}
}
@book{StaatErni2019,
  author    = {Staat, Manfred and Erni, Daniel},
  title     = {Symposium Proceedings; 3rd YRA MedTech Symposium 2019: May 24 / 2019 / FH Aachen},
  publisher = {Universit{\"a}t Duisburg-Essen},
  address   = {Duisburg},
  organization    = {MedTech Symposium},
  isbn      = {978-3-940402-22-6},
  doi       = {10.17185/duepublico/48750},
  pages     = {49 Seiten},
  year      = {2019},
  language  = {en}
}
@article{KruegerGroetzingerBerndt1987,
  author    = {Kr{\"u}ger, G{\"o}tz and Gr{\"o}tzinger, Joachim and Berndt, Heinz},
  title     = {Enantiomeric resolution of amino acid derivatives on chiral stationary phases by high-performance liquid chromatography},
  series = {Journal of Chromatography A},
  volume    = {1987},
  journal   = {Journal of Chromatography A},
  number    = {397},
  issn      = {0021-9673},
  doi       = {10.1016/S0021-9673(01)85005-6},
  pages     = {223 -- 232},
  year      = {1987},
  language  = {en}
}
@inproceedings{FerreinKallweitLautermann2012,
  author    = {Ferrein, Alexander and Kallweit, Stephan and Lautermann, Mark},
  title     = {Towards an autonomous pilot system for a tunnel boring machine},
  series = {5th Robotics and Mechatronics Conference of South Africa (ROBMECH) : 26 - 27 November 2012 ; CSIR International Conference Centre Gauteng South Africa},
  booktitle = {5th Robotics and Mechatronics Conference of South Africa (ROBMECH) : 26 - 27 November 2012 ; CSIR International Conference Centre Gauteng South Africa},
  publisher = {IEEE},
  address   = {Piscataway, NJ},
  isbn      = {978-1-4673-5183-6},
  year      = {2012},
  language  = {en}
}
@article{FontiEilmannGarciaGonzalezetal.2009,
  author    = {Fonti, Patrick and Eilmann, Britta and Garc{\´i}a-Gonz{\´a}lez, Ignacio and von Arx, Georg},
  title     = {Expeditious building of ring-porous earlywood vessel chronologies without loosing signal information},
  series = {Trees : structure and function},
  volume    = {23},
  journal   = {Trees : structure and function},
  number    = {3},
  publisher = {Springer},
  address   = {Berlin},
  issn      = {0931-1890 (Print)},
  doi       = {10.1007/s00468-008-0310-z},
  pages     = {665 -- 671},
  year      = {2009},
  language  = {en}
}
@article{HerrmannLippke1999,
  author    = {Herrmann, Ulf and Lippke, F.},
  title     = {The influence of transients on the design of DSG solar fields},
  series = {Journal de Physique IV : proceedings},
  volume    = {9},
  journal   = {Journal de Physique IV : proceedings},
  number    = {PR3},
  isbn      = {2-86883-402-7},
  issn      = {1764-7177 (Online)},
  doi       = {10.1051/jp4:1999377},
  pages     = {489 -- 494},
  year      = {1999},
  language  = {en}
}
@article{WangAnikFrohberg1988,
  author    = {Wang, Mao and Anik, Sabri and Frohberg, Martin G.},
  title     = {Experiments on the electrochemical determination of the sulphur activities in the system copper-silver at 1200°C},
  series = {Zeitschrift f{\"u}r Metallkunde},
  volume    = {79},
  journal   = {Zeitschrift f{\"u}r Metallkunde},
  number    = {5},
  issn      = {0044-3093},
  pages     = {336 -- 339},
  year      = {1988},
  language  = {en}
}