@article{PrielmeierLang1988, author = {Prielmeier, Franz and Lang, E. W.}, title = {Multinuclear Spin-Lattice Relaxation Time Studies of Supercooled Aqueous LiCl-Solutions / E .W. Lang, F. X. Prielmeier}, series = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 92 (1988)}, journal = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 92 (1988)}, isbn = {0005-9021}, pages = {717}, year = {1988}, language = {en} } @article{SvaneborgKarimiVarzanehHojdisetal.2016, author = {Svaneborg, Carsten and Karimi-Varzaneh, Hossein Ali and Hojdis, Nils and Fleck, Franz and Everaers, Ralf}, title = {Multiscale approach to equilibrating model polymer melts}, series = {Physical Review E}, volume = {94}, journal = {Physical Review E}, number = {032502}, publisher = {AIP Publishing}, address = {Melville, NY}, issn = {2470-0053}, doi = {10.1103/PhysRevE.94.032502}, year = {2016}, abstract = {We present an effective and simple multiscale method for equilibrating Kremer Grest model polymer melts of varying stiffness. In our approach, we progressively equilibrate the melt structure above the tube scale, inside the tube and finally at the monomeric scale. We make use of models designed to be computationally effective at each scale. Density fluctuations in the melt structure above the tube scale are minimized through a Monte Carlo simulated annealing of a lattice polymer model. Subsequently the melt structure below the tube scale is equilibrated via the Rouse dynamics of a force-capped Kremer-Grest model that allows chains to partially interpenetrate. Finally the Kremer-Grest force field is introduced to freeze the topological state and enforce correct monomer packing. We generate 15 melts of 500 chains of 10.000 beads for varying chain stiffness as well as a number of melts with 1.000 chains of 15.000 monomers. To validate the equilibration process we study the time evolution of bulk, collective, and single-chain observables at the monomeric, mesoscopic, and macroscopic length scales. Extension of the present method to longer, branched, or polydisperse chains, and/or larger system sizes is straightforward.}, language = {en} } @article{DruckenmuellerGuentherElbers2018, author = {Druckenm{\"u}ller, Katharina and G{\"u}nther, Klaus and Elbers, Gereon}, title = {Near-infrared spectroscopy (NIRS) as a tool to monitor exhaust air from poultry operations}, series = {Science of the Total Environment}, volume = {630}, journal = {Science of the Total Environment}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0048-9697}, doi = {10.1016/j.scitotenv.2018.02.072}, pages = {536 -- 543}, year = {2018}, abstract = {Intensive poultry operation systems emit a considerable volume of inorganic and organic matter in the surrounding environment. Monitoring cleaning properties of exhaust air cleaning systems and to detect small but significant changes in emission characteristics during a fattening cycle is important for both emission and fattening process control. In the present study, we evaluated the potential of near-infrared spectroscopy (NIRS) combined with chemometric techniques as a monitoring tool of exhaust air from poultry operation systems. To generate a high-quality data set for evaluation, the exhaust air of two poultry houses was sampled by applying state-of-the-art filter sampling protocols. The two stables were identical except for one crucial difference, the presence or absence of an exhaust air cleaning system. In total, twenty-one exhaust air samples were collected at the two sites to monitor spectral differences caused by the cleaning device, and to follow changes in exhaust air characteristics during a fattening period. The total dust load was analyzed by gravimetric determination and included as a response variable in multivariate data analysis. The filter samples were directly measured with NIR spectroscopy. Principal component analysis (PCA), linear discriminant analysis (LDA), and factor analysis (FA) were effective in classifying the NIR exhaust air spectra according to fattening day and origin. The results indicate that the dust load and the composition of exhaust air (inorganic or organic matter) substantially influence the NIR spectral patterns. In conclusion, NIR spectroscopy as a tool is a promising and very rapid way to detect differences between exhaust air samples based on still not clearly defined circumstances triggered during a fattening period and the availability of an exhaust air cleaning system.}, language = {en} } @article{SelmerPierikHeider2005, author = {Selmer, Thorsten and Pierik, Antonio J. and Heider, Johann}, title = {New glycyl radical enzymes catalysing key metabolic steps in anaerobic bacteria}, series = {Biological Chemistry. 386 (2005), H. 10}, journal = {Biological Chemistry. 386 (2005), H. 10}, isbn = {1431-6730}, pages = {981 -- 988}, year = {2005}, language = {en} } @article{SchererKratzGoberetal.1992, author = {Scherer, Ulrich W. and Kratz, J. V. and Gober, M. K. and Zimmermann, H. P.}, title = {New nuclide 263 105 / J.V. Kratz, M.K. Gober, H.P. Zimmermann, M. Sch{\"a}del, W. Br{\"u}chle, E. Schimpf, K.E. Gregorich, A. T{\"u}rler, N.J. Hannink, K.R. Czerwinski, B. Kadkhodayan, D.M. Lee, M.J. Nurmia, D.C. Hoffman, H. G{\"a}ggeler, D. Jost, U.W. Scherer, A. Weber}, series = {Physical Review C . 45 (1992)}, journal = {Physical Review C . 45 (1992)}, pages = {1064 -- 1069}, year = {1992}, language = {en} } @article{ThielTippkoetterSucketal.2013, author = {Thiel, Alexander and Tippk{\"o}tter, Nils and Suck, Kirstin and Sohling, Ulrich and Ruf, Friedrich and Ulber, Roland}, title = {New zeolite adsorbents for downstream processing of polyphenols from renewable resources}, series = {Engineering in Life Sciences}, volume = {13}, journal = {Engineering in Life Sciences}, number = {3}, publisher = {Wiley}, address = {Weinheim}, doi = {10.1002/elsc.201200188}, pages = {239 -- 246}, year = {2013}, abstract = {Commercial materials with polyvinylpolypyrrolidone and polymeric amberlites (XAD7HP, XAD16) are commonly used for the adsorptive downstream processing of polyphenols from renewable resources. In this study, beta-zeolite-based adsorbent systems were examined, and their properties were compared to organic resins. Batch adsorption experiments were conducted with synthetic solutions of major polyphenols. Adsorption isotherms and desorption characteristics of individual adsorbent were determined based on these results. Maximum adsorption capacities were calculated using the Langmuir model. For example, the zeolites had capacities up to 203.2 mg/g for ferulic acid. To extend these results to a complex system, additional experiments were performed on rapeseed meal and wheat seed extracts as representative renewable resources. HPLC analysis showed that with 7.5\% w/v, which is regarded as the optimum amount of zeolites, zeolites A and B could bind 100\% of the major polyphenols as well as release polyphenols at high yields. Additionally, regeneration experiments were performed with isopropyl alcohol at 99°C to evaluate how zeolites regenerate under mild conditions. The results showed only a negligible loss of adsorption capacity and no loss of desorption capacity. In summary, it was concluded that beta-zeolites were promising adsorbents for developing new processes to isolate polyphenols from renewable resources.}, language = {en} } @article{ElbersGaebHoffmannetal.2006, author = {Elbers, Gereon and G{\"a}b, Martina and Hoffmann, Katharina and Lobe, Melanie}, title = {NIR-spectroscopic investigation of foliage of ozone-stressed Fagus sylvatica trees / G{\"a}b, Martina ; Hoffmann, Katharina ; Lobe, Melanie ; Metzger, Rut ; Ooyen, Sven van ; Elbers, Gereon ; K{\"o}llner, Barbara}, series = {Journal of Forest Research. 11 (2006), H. 2}, journal = {Journal of Forest Research. 11 (2006), H. 2}, isbn = {1341-6979}, pages = {69 -- 75}, year = {2006}, language = {en} } @article{TippkoetterRoikaewUlber2008, author = {Tippk{\"o}tter, Nils and Roikaew, W. and Ulber, R.}, title = {Nitrate removal from whey concentrate with biotechnological regeneration of the waste water}, series = {European dairy magazine : EDM}, journal = {European dairy magazine : EDM}, number = {1}, isbn = {0936-6318}, pages = {30 -- 32}, year = {2008}, language = {en} } @article{BrabandPaulssenAbram2006, author = {Braband, Henrik and Paulßen, Elisabeth and Abram, Ulrich}, title = {Nitridorhenium(V) Complexes with 1,3-Dialkyl-4,5-dimethylimidazole-2-ylidenes}, series = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie : ZAAC = Journal of inorganic and general chemistry}, volume = {632}, journal = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie : ZAAC = Journal of inorganic and general chemistry}, number = {6}, issn = {1521-3749}, doi = {10.1002/zaac.200600002}, pages = {1051 -- 1056}, year = {2006}, language = {en} } @article{BaumannSemenehDehairsetal.1998, author = {Baumann, Marcus and Semeneh, M. and Dehairs, F. and Elskens, M.}, title = {Nitrogen uptake regime and phytoplankton community structure in the Southern Ocean / Semeneh, M. ; Dehairs, F. ; Elskens, M. ; Baumann, M.E.M. ; Kopczynska, E.E. ; Lancelot, C. ; Goeyens, L.}, series = {Journal of Marine Systems. 17 (1998), H. 1-4}, journal = {Journal of Marine Systems. 17 (1998), H. 1-4}, isbn = {0924-7963}, pages = {159 -- 177}, year = {1998}, language = {en} }