@article{AboulnagaZouSelmeretal.2018, author = {Aboulnaga, E. A. and Zou, H. and Selmer, Thorsten and Xian, M.}, title = {Development of a plasmid-based, tunable, tolC-derived expression system for application in Cupriavidus necator H16}, series = {Journal of Biotechnology}, volume = {274}, journal = {Journal of Biotechnology}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0168-1656}, doi = {10.1016/j.jbiotec.2018.03.007}, pages = {15 -- 27}, year = {2018}, abstract = {Cupriavidus necator H16 gains increasing attention in microbial research and biotechnological application due to its diverse metabolic features. Here we present a tightly controlled gene expression system for C. necator including the pBBR1-vector that contains hybrid promoters originating from C. necator native tolC-promoter in combination with a synthetic tetO-operator. The expression of the reporter gene from these plasmids relies on the addition of the exogenous inducer doxycycline (dc). The novel expression system offers a combination of advantageous features as; (i) high and dose-dependent recombinant protein production, (ii) tight control with a high dynamic range (On/Off ratio), which makes it applicable for harmful pathways or for toxic protein production, (iii) comparable cheap inducer (doxycycline, dc), (iv) effective at low inducer concentration, that makes it useful for large scale application, (v) rapid, diffusion controlled induction, and (vi) the inducer does not interfere within the cell metabolism. As applications of the expression system in C. necator H16, the growth ability on glycerol was enhanced by constitutively expressing the E. coli glpk gene-encoding for glycerol kinase. Likewise, we used the system to overcome the expression toxicity of mevalonate pathway in C. necator H16. With this system, the mevalonate-genes were successfully introduced in the host and the recombinant strains could produce about 200 mg/l mevalonate.}, language = {en} } @article{AboulnagaPinkenburgSchiffelsetal.2013, author = {Aboulnaga, E. H. and Pinkenburg, O. and Schiffels, Johannes and El-Refai, A. and Buckel, W. and Selmer, Thorsten}, title = {Butyrate production in Escherichia coli: Exploitation of an oxygen tolerant bifurcating butyryl-CoA dehydrogenase/electron transferring flavoprotein complex from Clostridium difficile}, series = {Journal of bacteriology. June 14, 2013}, journal = {Journal of bacteriology. June 14, 2013}, issn = {1098-5530 (E-Journal) ; 0021-9193 (Print)}, pages = {Epub ahead of print}, year = {2013}, language = {de} } @article{AbulnagaPinkenburgSchiffelsetal.2013, author = {Abulnaga, El-Hussiny and Pinkenburg, Olaf and Schiffels, Johannes and E-Refai, Ahmed and Buckel, Wolfgang and Selmer, Thorsten}, title = {Effect of an Oxygen-Tolerant Bifurcating Butyryl Coenzyme A Dehydrogenase/Electron-Transferring Flavoprotein Complex from Clostridium difficile on Butyrate Production in Escherichia coli}, series = {Journal of bacteriology}, volume = {195}, journal = {Journal of bacteriology}, number = {16}, issn = {1098-5530 [E-Journal]}, pages = {3704 -- 3713}, year = {2013}, language = {en} } @article{AggarwalDhimanKumaretal.2012, author = {Aggarwal, P. and Dhiman, S. and Kumar, G. and Scherer, Ulrich W. and Singla, M. L. and Srivastava, A.}, title = {Optical study of poly(ethyleneterephthalate) modified by different ionizing radiation dose}, series = {Indian Journal of Pure and Applied Physics}, volume = {50}, journal = {Indian Journal of Pure and Applied Physics}, number = {2}, issn = {0019-5596}, pages = {129 -- 132}, year = {2012}, abstract = {Thin films of poly(ethyleneterephthalate) [PET]were exposed to radiation dose ranging from 10 to 30 kGy by using gamma rays in the range 12.8-177.8 MGy using swift light ions of hydrogen. There was no effect of the radiation dose on the optical behaviour of PET as a result of exposure to radiation dose up to 30 kGy brought about by gamma rays but a significant decrease in the optical band gap values was observed when PET was exposed to swift light ions of hydrogen. The data obtained are discussed in terms of optical studies carried out on PET using swift heavy ions.}, language = {en} } @article{AggarwalSinghSinghetal.2011, author = {Aggarwal, Prerna and Singh, Virendra and Singh, Arjun and Scherer, Ulrich W. and Singh, Tejvir and Singla, Madan L. and Srivastava, Alok}, title = {Physico-chemical transformations in swift heavy ion modified poly(ethyleneterephthalate)}, series = {Radiation Physics and Chemistry}, journal = {Radiation Physics and Chemistry}, publisher = {Pergamon Press}, address = {Oxford}, isbn = {0969-806X}, pages = {1 -- 28}, year = {2011}, language = {en} } @article{AlKaidyDuweHusteretal.2014, author = {Al-Kaidy, Huschyar and Duwe, Anna and Huster, Manuel and Muffler, Kai and Schlegel, Christin and Sieker, Tim and Stadtm{\"u}ller, Ralf and Tippk{\"o}tter, Nils and Ulber, Roland}, title = {Biotechnologie und Bioverfahrenstechnik - Vom ersten Ullmanns Artikel bis hin zu aktuellen Forschungsthemen}, series = {Chemie Ingenieur Technik}, volume = {86}, journal = {Chemie Ingenieur Technik}, number = {12}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0009-286X}, doi = {10.1002/cite.201400083}, pages = {2215 -- 2225}, year = {2014}, abstract = {Biotechnologie und die mit ihr verbundenen technischen Prozesse pr{\"a}gen seit Jahrtausenden die Entwicklung der Menschheit. Ausgehend von empirischen Verfahren, insbesondere zur Herstellung von Lebensmitteln und t{\"a}glichen Gebrauchsg{\"u}tern, haben sich diese Disziplinen zu einem der innovativsten Zukunftsfelder entwickelt. Durch das immer detailliertere Verst{\"a}ndnis zellul{\"a}rer Vorg{\"a}nge k{\"o}nnen mittlerweile Produktionsst{\"a}mme gezielt optimiert werden. Im Zusammenspiel mit moderner Prozesstechnik k{\"o}nnen so eine Vielzahl von Bulk- und Feinchemikalien sowie Pharmazeutika effizient hergestellt werden. In diesem Artikel werden exemplarisch einige der aktuellen Trends vorgestellt.}, language = {de} } @article{AlKaidyDuweHusteretal.2015, author = {Al-Kaidy, Huschyar and Duwe, Anna and Huster, Manuel and Muffler, Kai and Schlegel, Christin and Tim, Sieker and Stadtm{\"u}ller, Ralf and Tippk{\"o}tter, Nils and Ulber, Roland}, title = {Biotechnology and bioprocess engineering - from the first ullmann's article to recent trends}, series = {ChemBioEng Reviews}, volume = {2}, journal = {ChemBioEng Reviews}, number = {3}, publisher = {Wiley}, address = {Weinheim}, doi = {10.1002/cben.201500008}, pages = {175 -- 184}, year = {2015}, abstract = {For several thousand years, biotechnology and its associated technical processes have had a great impact on the development of mankind. Based on empirical methods, in particular for the production of foodstuffs and daily commodities, these disciplines have become one of the most innovative future issues. Due to the increasing detailed understanding of cellular processes, production strains can now be optimized. In combination with modern bioprocesses, a variety of bulk and fine chemicals as well as pharmaceuticals can be produced efficiently. In this article, some of the current trends in biotechnology are discussed.}, language = {en} } @article{AlKaidyKuthanHeringetal.2016, author = {Al-Kaidy, Huschyar and Kuthan, Kai and Hering, Thomas and Tippk{\"o}tter, Nils}, title = {Aqueous droplets used as enzymatic microreactors and their electromagnetic actuation}, series = {Journal of Visualized Experiments}, journal = {Journal of Visualized Experiments}, number = {Issue 126}, issn = {1940-087X}, doi = {10.3791/54643}, year = {2016}, abstract = {For the successful implementation of microfluidic reaction systems, such as PCR and electrophoresis, the movement of small liquid volumes is essential. In conventional lab-on-a-chip-platforms, solvents and samples are passed through defined microfluidic channels with complex flow control installations. The droplet actuation platform presented here is a promising alternative. With it, it is possible to move a liquid drop (microreactor) on a planar surface of a reaction platform (lab-in-a-drop). The actuation of microreactors on the hydrophobic surface of the platform is based on the use of magnetic forces acting on the outer shell of the liquid drops which is made of a thin layer of superhydrophobic magnetite particles. The hydrophobic surface of the platform is needed to avoid any contact between the liquid core and the surface to allow a smooth movement of the microreactor. On the platform, one or more microreactors with volumes of 10 µL can be positioned and moved simultaneously. The platform itself consists of a 3 x 3 matrix of electrical double coils which accommodate either neodymium or iron cores. The magnetic field gradients are automatically controlled. By variation of the magnetic field gradients, the microreactors' magnetic hydrophobic shell can be manipulated automatically to move the microreactor or open the shell reversibly. Reactions of substrates and corresponding enzymes can be initiated by merging the microreactors or bringing them into contact with surface immobilized catalysts.}, language = {en} } @article{AlKaidyTippkoetter2016, author = {Al-Kaidy, Huschyar and Tippk{\"o}tter, Nils}, title = {Superparamagnetic hydrophobic particles as shell material for digital microfluidic droplets and proof-of-principle reaction assessments with immobilized laccase}, series = {Engineering in Life Sciences}, volume = {16}, journal = {Engineering in Life Sciences}, number = {3}, publisher = {Wiley-VCH}, address = {Weinheim}, doi = {10.1002/elsc.201400124}, pages = {222 -- 230}, year = {2016}, abstract = {In the field of biotechnology and molecular biology, the use of small liquid volumes has significant advantages. In particular, screening and optimization runs with acceptable amounts of expensive and hardly available catalysts, reagents, or biomolecules are feasible with microfluidic technologies. The presented new microfluidic system is based on the inclusion of small liquid volumes by a protective shell of magnetizable microparticles. Hereby, discrete aqueous microreactor drops with volumes of 1-30 μL can be formed on a simple planar surface. A digital movement and manipulation of the microreactor is performed by overlapping magnetic forces. The magnetic forces are generated by an electrical coil matrix positioned below a glass plate. With the new platform technology, several discrete reaction compartments can be moved simultaneously on one surface. Due to the magnetic fields, the reactors can even be merged to initiate reactions by mixing or positioned above surface-immobilized catalysts and then opened by magnetic force. Comparative synthesis routes of the magnetizable shell particles and superhydrophobic glass slides including their performance and stability with the reaction platform are described. The influence of diffusive mass transport during the catalyzed reaction is discussed by evaluation finite element model of the microreactor. Furthermore, a first model dye reaction of the enzyme laccase has been established.}, language = {en} } @article{AletseeBaumann1991, author = {Aletsee, Ludwig and Baumann, Marcus}, title = {A laboratory incubator equipped with facilities to automatically simulate natural irradiance}, series = {Boletim do Instituto Oceanogr{\´a}fico / Universidade de S{\~a}o Paulo}, volume = {Vol. 39}, journal = {Boletim do Instituto Oceanogr{\´a}fico / Universidade de S{\~a}o Paulo}, number = {No. 2}, issn = {1982-436X; 0080-6331}, pages = {155 -- 159}, year = {1991}, language = {en} } @article{BalakrishnanAndreiSelmerSelmeretal.2010, author = {Balakrishnan, Karthikeyan and Andrei-Selmer, Luminita-Cornelia and Selmer, Thorsten and Bacher, Michael and Dodel, Richard}, title = {Comparison of Intravenous Immunoglobulins for Naturally Occurring Autoantibodies against Amyloid-β}, series = {Journal of Alzheimer's Disease}, volume = {20}, journal = {Journal of Alzheimer's Disease}, number = {1}, isbn = {1387-2877}, pages = {135 -- 143}, year = {2010}, language = {en} } @article{BarbazanHagenbachPaulssenetal.2010, author = {Barbaz{\´a}n, Paula and Hagenbach, Adelheid and Paulßen, Elisabeth and Abram, Ulrich and Carballo, Rosa and Rodriguez-Hermida, Sabina and V{\´a}zquez-L{\´o}pez, Ezequiel M.}, title = {Tricarbonyl Rhenium(I) and Technetium(I) Complexes with Hydrazones Derived from 4,5-Diazafluoren-9-one and 1,10-Phenanthroline-5,6-dione}, series = {European Journal of Inorganic Chemistry}, journal = {European Journal of Inorganic Chemistry}, number = {29}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1099-0682}, doi = {10.1002/ejic.201000522}, pages = {4622 -- 4630}, year = {2010}, abstract = {Tricarbonylrhenium(I) and -technetium(I) halide (halide = Cl and Br) complexes of ligands derived from 4,5-diazafluoren-9-one (df) and 1,10-phenanthroline-5,6-dione (phen) derivatives of benzoic and 2-hydroxybenzoic acid hydrazides have been prepared. The complexes have been characterized by elemental analysis, MS, IR, 1H NMR and absorption and emission UV/Vis spectroscopic methods. The metal centres (ReI and TcI) are coordinated through the nitrogen imine atoms and establish five-membered chelate rings, whereas the hydrazone groups stand uncoordinated. The 1H NMR spectra suggest the same behaviour in solution on the basis of only marginal variations in the chemical shifts of the hydrazine protons.}, language = {en} } @article{Baumann1996, author = {Baumann, Marcus}, title = {Algenbl{\"u}ten \& Treibhauseffekt : Wechselwirkungen mit anthropogenen Aktivit{\"a}ten}, series = {Wechselwirkung : Wissenschaft \& vernetztes Denken}, volume = {18}, journal = {Wechselwirkung : Wissenschaft \& vernetztes Denken}, number = {81}, issn = {0172-1623}, pages = {6 -- 11}, year = {1996}, language = {de} } @article{BaumannBrandiniStaubes1994, author = {Baumann, Marcus and Brandini, Frederico and Staubes, Regina}, title = {The influence of light and temperature on carbonspecific DMS release by cultures of Phaeocystis antarctica and three antarctic diatoms / Baumann, Marcus E.M. ; Brandini, Frederico ; Staubes, Regina}, series = {Marine Chemistry. 45 (1994), H. 1-2}, journal = {Marine Chemistry. 45 (1994), H. 1-2}, isbn = {0304-4203}, pages = {129 -- 136}, year = {1994}, language = {en} } @article{BaumannGoeyensSemenehetal.1998, author = {Baumann, Marcus and Goeyens, L. and Semeneh, M. and Elskens, M.}, title = {Phytoplankton nutrient utilisation and nutrient signature in the Southern Ocean / Goeyens, L. ; Semeneh, M. ; Baumann, M.E.M. ; Elskens, M. ; Shopova, D. ; Dehairs, F.}, series = {Journal of Marine Systems. 17 (1998), H. 1-4}, journal = {Journal of Marine Systems. 17 (1998), H. 1-4}, isbn = {0924-7963}, pages = {143 -- 157}, year = {1998}, language = {en} } @article{BaumannGoeyensTregueretal.1995, author = {Baumann, Marcus and Goeyens, L. and Tr{\´e}guer, P. and Baeyens, W.}, title = {The leading role of ammonium in the nitrogen uptake regime of Southern Ocean marginal ice zones / Goeyens, L. ; Tr{\´e}guer, P. ; Baumann, M.E.M. ; Baeyens, W. ; Dehairs, F.}, series = {Journal of Marine Systems. 6 (1995), H. 4}, journal = {Journal of Marine Systems. 6 (1995), H. 4}, isbn = {0924-7963}, pages = {345 -- 361}, year = {1995}, language = {de} } @article{BaumannGradinger1991, author = {Baumann, Marcus and Gradinger, R.}, title = {Distribution of Phytoplankton Communities in Relation to the Large Scale Hydrographical Regime in the Fram Strait 1984 / Gradinger, R. ; Baumann, M.E.M.}, series = {Marine Biology. 111 (1991), H. 2}, journal = {Marine Biology. 111 (1991), H. 2}, isbn = {0025-3162}, pages = {311 -- 321}, year = {1991}, language = {en} } @article{BaumannGronsfeldSchuetzLembach1997, author = {Baumann, Marcus and Gronsfeld, A. and Sch{\"u}tz-Lembach, G.}, title = {Nachdenklichkeit {\"u}ber Nachhaltigkeit : wie uns ein neues Wort alte Probleme neu entdecken l{\"a}ßt}, series = {Wechselwirkung : Wissenschaft \& vernetztes Denken}, volume = {19}, journal = {Wechselwirkung : Wissenschaft \& vernetztes Denken}, number = {87}, issn = {0172-1623}, pages = {6 -- 11}, year = {1997}, language = {de} } @article{BaumannHircheKattneretal.1991, author = {Baumann, Marcus and Hirche, H.-J. and Kattner, G. and Gradinger, R.}, title = {Plankton distribution and the impact of copepod grazing on primary production in Fram Strait, Greenland Sea / Hirche, H.-J. ; Baumann, M.E.M. ; Kattner, G.; Gradinger, R.}, series = {Journal of Marine Systems. 2 (1991), H. 3-4}, journal = {Journal of Marine Systems. 2 (1991), H. 3-4}, isbn = {0924-7963}, pages = {477 -- 494}, year = {1991}, language = {en} } @article{BaumannJahnke1986, author = {Baumann, Marcus and Jahnke, J.}, title = {Die marine Planktonalge Phaeocystis globosa / Jahnke, J. ; Baumann, M.}, series = {Mikrokosmos. 75 (1986), H. 12}, journal = {Mikrokosmos. 75 (1986), H. 12}, isbn = {0026-3680}, pages = {357 -- 359}, year = {1986}, language = {de} } @article{BaumannJahnke1983, author = {Baumann, Marcus and Jahnke, J.}, title = {Chemical and Physical Effects on the Shape and Growth of the Diatom Biddulphia sinensis GREVILLE in Batch Cultures: A Contribution to Bioindication in Plankton Ecology / Jahnke, J. ; Baumann, M.}, series = {Hydrobiological Bulletin . 17 (1983), H. 1}, journal = {Hydrobiological Bulletin . 17 (1983), H. 1}, isbn = {0165-1404}, pages = {5 -- 20}, year = {1983}, language = {en} } @article{BaumannJahnke1986, author = {Baumann, Marcus and Jahnke, J.}, title = {Marine Planktonalgen der Arktis I. Die Haptophycee Phaeocystis pouchetii / Baumann, M. ; Jahnke, J.}, series = {Mikrokosmos. 75 (1986), H. 9}, journal = {Mikrokosmos. 75 (1986), H. 9}, isbn = {0026-3680}, pages = {262 -- 265}, year = {1986}, language = {de} } @article{BaumannKraemer1986, author = {Baumann, Marcus and Kr{\"a}mer, M.}, title = {Marine Planktonalgen der Arktis II. Diatomeen / Baumann, M. ; Kr{\"a}mer, M.}, series = {Mikrokosmos. 75 (1986), H. 10}, journal = {Mikrokosmos. 75 (1986), H. 10}, isbn = {0026-3680}, pages = {306 -- 310}, year = {1986}, language = {de} } @article{BaumannLancelotBrandinietal.1994, author = {Baumann, Marcus and Lancelot, C. and Brandini, F. and Sakshaug, E.}, title = {The taxonomic identity of the cosmopolitan prymnesiophyte Phaeocystis, a morphological and ecophysiological approach / Baumann, M.E.M. ; Lancelot, C. ; Brandini, F. ; Sakshaug, E. ; John M.}, series = {Journal of Marine Systems. 5 (1994), H. 1}, journal = {Journal of Marine Systems. 5 (1994), H. 1}, isbn = {0924-7963}, pages = {5 -- 22}, year = {1994}, language = {en} } @article{BaumannLaraHubbertenetal.1997, author = {Baumann, Marcus and Lara, R.J. and Hubberten, D.N. and Thomas, D.N.}, title = {Dissolved organic matter studies in enclosed systems: Application of hydophobic fractionation for the assessment of organic nitrogen dynamics / Lara, R.J. ; Hubberten, U. ; Thomas, D.N. ; Baumann, M.E.M. ; Kattner, G.}, series = {Journal of Marine Systems. 13 (1997), H. 1-4}, journal = {Journal of Marine Systems. 13 (1997), H. 1-4}, isbn = {0924-7963}, pages = {155 -- 161}, year = {1997}, language = {en} } @article{BaumannPeschel1998, author = {Baumann, Marcus and Peschel, G.}, title = {Aktuelle Entwicklungen zur Luftreinhaltung in der Stadt Aachen}, series = {Wechselwirkung : Wissenschaft \& vernetztes Denken}, volume = {20}, journal = {Wechselwirkung : Wissenschaft \& vernetztes Denken}, number = {91}, issn = {0172-1623}, pages = {22 -- 29}, year = {1998}, language = {de} } @article{BaumannRousseauVaulotetal.1994, author = {Baumann, Marcus and Rousseau, V. and Vaulot, D. and Casotti, R.}, title = {The life cycle of Phaeocystis (Prymnesiophycae): evidence and hypotheses / Rousseau, V. ; Vaulot, D. ; Casotti, R. ; Cariou, V. ; Lenz, J. ; Gunkel, J. ; Baumann, M.}, series = {Journal of Marine Systems. 5 (1994), H. 1}, journal = {Journal of Marine Systems. 5 (1994), H. 1}, isbn = {0924-7963}, pages = {23 -- 39}, year = {1994}, 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} } @article{BaumannThomasGleitz1992, author = {Baumann, Marcus and Thomas, D. and Gleitz, M.}, title = {Efficiency of carbon assimilation and photoacclimation in a small unicellular Chaetoceros species from the Weddel Sea (Antarctica): Influence of temperature and irridiance / Thomas, D. ; Baumann, M.E.M. ; Gleitz, M.}, series = {Journal of Experimental Marine Biology and Ecology. 157 (1992), H. 2}, journal = {Journal of Experimental Marine Biology and Ecology. 157 (1992), H. 2}, isbn = {0022-0981}, pages = {195 -- 209}, year = {1992}, language = {en} } @article{BaumannTillmannAletsee1989, author = {Baumann, Marcus and Tillmann, U. and Aletsee, L.}, title = {Distribution of Carbon Among Photosynthetic End Products in the Bloom-Forming Arctic Diatom Thalassiosira antarctica COMBER / Tillmann, U. ; Baumann, M.E.M. ; Aletsee, L.}, series = {Polar Biology. 10 (1989), H. 3}, journal = {Polar Biology. 10 (1989), H. 3}, isbn = {0722-4060}, pages = {231 -- 238}, year = {1989}, language = {en} } @article{BechtSchollmayerMonakhovaetal.2021, author = {Becht, Alexander and Schollmayer, Curd and Monakhova, Yulia and Holzgrabe, Ulrike}, title = {Tracing the origin of paracetamol tablets by near-infrared, mid-infrared, and nuclear magnetic resonance spectroscopy using principal component analysis and linear discriminant analysis}, series = {Analytical and Bioanalytical Chemistry}, volume = {413}, journal = {Analytical and Bioanalytical Chemistry}, publisher = {Springer Nature}, issn = {1618-2650}, doi = {10.1007/s00216-021-03249-z}, pages = {3107 -- 3118}, year = {2021}, abstract = {Most drugs are no longer produced in their own countries by the pharmaceutical companies, but by contract manufacturers or at manufacturing sites in countries that can produce more cheaply. This not only makes it difficult to trace them back but also leaves room for criminal organizations to fake them unnoticed. For these reasons, it is becoming increasingly difficult to determine the exact origin of drugs. The goal of this work was to investigate how exactly this is possible by using different spectroscopic methods like nuclear magnetic resonance and near- and mid-infrared spectroscopy in combination with multivariate data analysis. As an example, 56 out of 64 different paracetamol preparations, collected from 19 countries around the world, were chosen to investigate whether it is possible to determine the pharmaceutical company, manufacturing site, or country of origin. By means of suitable pre-processing of the spectra and the different information contained in each method, principal component analysis was able to evaluate manufacturing relationships between individual companies and to differentiate between production sites or formulations. Linear discriminant analysis showed different results depending on the spectral method and purpose. For all spectroscopic methods, it was found that the classification of the preparations to their manufacturer achieves better results than the classification to their pharmaceutical company. The best results were obtained with nuclear magnetic resonance and near-infrared data, with 94.6\%/99.6\% and 98.7/100\% of the spectra of the preparations correctly assigned to their pharmaceutical company or manufacturer.}, language = {en} } @article{BergsMonakhovaDiehletal.2021, author = {Bergs, Michel and Monakhova, Yulia and Diehl, Bernd W. and Konow, Christopher and V{\"o}lkering, Georg and Pude, Ralf and Schulze, Margit}, title = {Lignins isolated via catalyst-free organosolv pulping from Miscanthus x giganteus, M. sinensis, M. robustus and M. nagara: a comparative study}, series = {Molecules}, volume = {26}, journal = {Molecules}, number = {4}, publisher = {MDPI}, address = {Basel}, issn = {1420-3049}, doi = {10.3390/molecules26040842}, year = {2021}, abstract = {As a low-input crop, Miscanthus offers numerous advantages that, in addition to agricultural applications, permits its exploitation for energy, fuel, and material production. Depending on the Miscanthus genotype, season, and harvest time as well as plant component (leaf versus stem), correlations between structure and properties of the corresponding isolated lignins differ. Here, a comparative study is presented between lignins isolated from M. x giganteus, M. sinensis, M. robustus and M. nagara using a catalyst-free organosolv pulping process. The lignins from different plant constituents are also compared regarding their similarities and differences regarding monolignol ratio and important linkages. Results showed that the plant genotype has the weakest influence on monolignol content and interunit linkages. In contrast, structural differences are more significant among lignins of different harvest time and/or season. Analyses were performed using fast and simple methods such as nuclear magnetic resonance (NMR) spectroscopy. Data was assigned to four different linkages (A: β-O-4 linkage, B: phenylcoumaran, C: resinol, D: β-unsaturated ester). In conclusion, A content is particularly high in leaf-derived lignins at just under 70\% and significantly lower in stem and mixture lignins at around 60\% and almost 65\%. The second most common linkage pattern is D in all isolated lignins, the proportion of which is also strongly dependent on the crop portion. Both stem and mixture lignins, have a relatively high share of approximately 20\% or more (maximum is M. sinensis Sin2 with over 30\%). In the leaf-derived lignins, the proportions are significantly lower on average. Stem samples should be chosen if the highest possible lignin content is desired, specifically from the M. x giganteus genotype, which revealed lignin contents up to 27\%. Due to the better frost resistance and higher stem stability, M. nagara offers some advantages compared to M. x giganteus. Miscanthus crops are shown to be very attractive lignocellulose feedstock (LCF) for second generation biorefineries and lignin generation in Europe.}, language = {en} } @article{Berndt1979, author = {Berndt, Heinz}, title = {Synthese der Sequenz 71—86 des Humanproinsulins, III : Synthese {\"u}ber die Fragmente 71—78 und 79—86}, series = {Hoppe-Seyler's Zeitschrift f{\"u}r physiologische Chemie}, volume = {360}, journal = {Hoppe-Seyler's Zeitschrift f{\"u}r physiologische Chemie}, number = {1}, issn = {1437-4315}, doi = {10.1515/bchm2.1979.360.1.765}, pages = {765 -- 772}, year = {1979}, language = {de} } @article{Berndt1979, author = {Berndt, Heinz}, title = {Synthese der Sequenz 71—86 des Humanproinsulins, I : Synthese der Sequenz 71—86 als monomeres cyclisches Biscystinpeptidderivat und als Tetra-S-tritylderivat}, series = {Hoppe-Seyler's Zeitschrift f{\"u}r physiologische Chemie}, volume = {360}, journal = {Hoppe-Seyler's Zeitschrift f{\"u}r physiologische Chemie}, number = {1}, issn = {1437-4315}, doi = {10.1515/bchm2.1979.360.1.747}, pages = {747 -- 760}, year = {1979}, language = {de} } @article{Berndt1980, author = {Berndt, Heinz}, title = {Zur Reaktion von Iminodithiocarbonaten mit Carbons{\"a}uren. I : Synthese des Modellpeptid-Derivates Z-(L)-Ala-(L/D)-Phe-(L)-Val-OMe}, series = {Tetrahedron letters}, volume = {21}, journal = {Tetrahedron letters}, number = {34}, issn = {0040-4039}, doi = {10.1016/S0040-4039(00)78663-1}, pages = {3265 -- 3268}, year = {1980}, language = {de} } @article{BerndtGattnerZahn1975, author = {Berndt, Heinz and Gattner, Hans-Gregor and Zahn, Helmut}, title = {Semisynthetisches Des-A1-glycin-Schafinsulin}, series = {Biological Chemistry}, volume = {356}, journal = {Biological Chemistry}, number = {2}, publisher = {De Gruyter}, address = {Berlin}, issn = {1437-4315}, doi = {10.1515/bchm2.1975.356.2.1455}, pages = {1469 -- 1472}, year = {1975}, language = {de} } @article{BerndtKlostermeyerZahn1972, author = {Berndt, Heinz and Klostermeyer, Henning and Zahn, Helmut}, title = {Zur Synthese monomerer cyclischer Cystinpeptidderivate, I : Synthese der Sequenz A 6-9 des Schafinsulins als Cyclocystinylderivat}, series = {Justus Liebigs Annalen der Chemie}, volume = {759}, journal = {Justus Liebigs Annalen der Chemie}, number = {1}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1099-0690}, doi = {10.1002/jlac.19727590109}, pages = {114 -- 120}, year = {1972}, abstract = {Es wird die Synthese der Sequenz A 6-9 des Schafinsulins in der gesch{\"u}tzten Form Boc-Cys-Cys-Ala-Gly-OBuᵗ (5) sowie das Verhalten dieses monomeren cyclischen Cystinpeptidderivates gegen{\"u}ber den in der Peptidchemie gebr{\"a}uchlichen Reagenzien Bortrifluorid/Eisessig, Tri{\"a}thylamin und Hydrazinhydrat beschrieben.}, language = {de} } @article{BerndtKrueger1985, author = {Berndt, Heinz and Kr{\"u}ger, G{\"o}tz}, title = {Resolution of enantiomeric amino acid derivatives by high-performance liquid chromatography on chiral stationary phases}, series = {Journal of chromatography A}, volume = {1985}, journal = {Journal of chromatography A}, number = {348}, issn = {0021-9673}, doi = {10.1016/S0021-9673(01)92461-6}, pages = {275 -- 279}, year = {1985}, language = {en} } @article{BerndtZahn1975, author = {Berndt, Heinz and Zahn, Helmut}, title = {Peptide, 99 : Monomere cyclische Cystinpeptidderivate, III ; Synthese der Schafinsulin-A-Kettensequenzen A2-21 und A1-21 als monomere cyclische Dicystinpeptidderivate}, series = {Justus Liebigs Annalen der Chemie}, volume = {1975}, journal = {Justus Liebigs Annalen der Chemie}, number = {9}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1099-0690}, doi = {10.1002/jlac.197519750908}, pages = {1601 -- 1612}, year = {1975}, abstract = {Die Synthese der Sequenzen A2—21 (13) und A1—21 (15) der Schafinsulin-A-Kette als monomere cyclische Dicystinpeptidderivate wird beschrieben. Die intrachenaren Cystinbr{\"u}cken A6—7 und A 11 —20 vermitteln die L{\"o}slichkeit dieser Derivate in Dimethylformamid und erm{\"o}glichen erstmalig die Reindarstellung vollgesch{\"u}tzter Insulin-A-Kettenderivate. Die w{\"a}hrend der Synthese eingesetzten Schutzgruppen lassen sich mittels Trifluoressigs{\"a}ure und 2-Mercapto{\"a}thanol quantitativ entfernen.}, language = {de} } @article{BiselliBornThoemmesetal.1996, author = {Biselli, Manfred and Born, C. and Th{\"o}mmes, J. and Wandrey, C.}, title = {An approach to integrated antibody production: Coupling of fluidized bed cultivation and fluidized bed adsorption / Born, C. ; Th{\"o}mmes, J. ; Biselli, M. ; Wandrey, C. ; Kula, M.-R.}, series = {Bioprocess Engineering. 15 (1996), H. 1}, journal = {Bioprocess Engineering. 15 (1996), H. 1}, isbn = {1615-7591}, pages = {21 -- 29}, year = {1996}, language = {en} } @article{BiselliBornWandrey1995, author = {Biselli, Manfred and Born, C. and Wandrey, C.}, title = {Oxygen transfer from the gasphase to the immobilized cells in membrane aerated fluidized beds / Born, C. ; Biselli, M. ; Wandrey, C.}, series = {Animal cell technology : basic \& applied aspects : proceedings of the Eighth Annual Meeting of the Japanese Association for Animal Cell Technology, Iizuka, Fukuoka, Japan, November 6-10, 1995 / edited by K. Funatsu, Y. Shirai, and T. Matsushita}, journal = {Animal cell technology : basic \& applied aspects : proceedings of the Eighth Annual Meeting of the Japanese Association for Animal Cell Technology, Iizuka, Fukuoka, Japan, November 6-10, 1995 / edited by K. Funatsu, Y. Shirai, and T. Matsushita}, publisher = {Kluwer Acad. Press}, address = {Boston}, isbn = {0-7923-4486-3}, pages = {83 -- 87}, year = {1995}, language = {en} } @article{BiselliBornWandrey1995, author = {Biselli, Manfred and Born, C. and Wandrey, C.}, title = {Production of monoclonal antibodies in a pilot scale fluidized bed bioreactor / Born, C.; Biselli, M.; Wandrey, C.}, series = {Animal cell technology : developments towards the 21st century / edited by E. C. Beuvery}, journal = {Animal cell technology : developments towards the 21st century / edited by E. C. Beuvery}, publisher = {Kluwer Acad. Press}, address = {Dordrecht}, isbn = {0-7923-3736-0}, pages = {515 -- 519}, year = {1995}, language = {en} } @article{BiselliBaeckerPoghossianetal.2010, author = {Biselli, Manfred and B{\"a}cker, Matthias and Poghossian, Arshak and Sch{\"o}ning, Michael Josef and Schnitzler, Thomas and Zang, Werner and Wagner, P.}, title = {Entwicklung eines modularen festk{\"o}rperbasierten Sensorsystems f{\"u}r die {\"U}berwachung von Zellkulturfermenationen}, series = {Sensoren und Messsysteme 2010 [Elektronische Ressource] : Vortr{\"a}ge der 15. ITG/GMA-Fachtagung vom 18. bis 19. Mai 2010 in N{\"u}rnberg / Informationstechnische Gesellschaft im VDE (ITG); VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA)}, journal = {Sensoren und Messsysteme 2010 [Elektronische Ressource] : Vortr{\"a}ge der 15. ITG/GMA-Fachtagung vom 18. bis 19. Mai 2010 in N{\"u}rnberg / Informationstechnische Gesellschaft im VDE (ITG); VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA)}, publisher = {VDE Verlag}, address = {Berlin}, isbn = {978-3-8007-3260-9}, pages = {688 -- 691}, year = {2010}, language = {de} } @article{BiselliHambachRunstadleretal.1992, author = {Biselli, Manfred and Hambach, B. and Runstadler, P. W. and Wandrey, Christian}, title = {Development of a reactor-integrated aeration system for cultivation of animal cells in fluidized beds / Hambach, B. ; Biselli, M. ; Runstadler, P.W. ; Wandrey, C.}, series = {Animal cell technology : developments, processes, and products ; ESACT, European Society for Animal Cell Technology, the 11th meeting / Ed. R. E. Spier}, journal = {Animal cell technology : developments, processes, and products ; ESACT, European Society for Animal Cell Technology, the 11th meeting / Ed. R. E. Spier}, publisher = {Butterworth-Heinemann}, address = {Oxford}, isbn = {0750604212}, pages = {381 -- 385}, year = {1992}, language = {en} } @article{BiselliHilbertJelineketal.2001, author = {Biselli, Manfred and Hilbert, U. and Jelinek, N. and Schmidt, S.}, title = {Bioprocess development for the cultivation of human T-lymphocytes / Hilbert, U. ; Jelinek, N. Schmidt, S. ; Biselli, M.}, series = {Engineering in Life Sciences. 1 (2001)}, journal = {Engineering in Life Sciences. 1 (2001)}, isbn = {1618-0240}, pages = {20 -- 23}, year = {2001}, language = {en} } @article{BiselliHilbertNoll2001, author = {Biselli, Manfred and Hilbert, U. and Noll, T.}, title = {Cultivation of Human HCMV Specific Lymphocytes - An Example for Adoptive Immunotherapy / Hilbert, U. ; Biselli, M. ; Noll, T.}, series = {Animal cell technology : from target to market ; Tyl{\"o}sand, Sweden, June 10 - 14, 2001 / ed. by E. Lindner-Olsson ...}, journal = {Animal cell technology : from target to market ; Tyl{\"o}sand, Sweden, June 10 - 14, 2001 / ed. by E. Lindner-Olsson ...}, publisher = {Kluwer}, address = {Dordrecht}, isbn = {1-4020-0264-5}, pages = {558 -- 561}, year = {2001}, language = {en} } @article{BiselliHilbertJelineketal.2000, author = {Biselli, Manfred and Hilbert, Ulrike and Jelinek, Nanni and Schmidt, Sebastian}, title = {Biotechnologische Aspekte der Kultivierung humaner T-Lymphozyten / Hilbert, Ulrike ; Jelinek, Nanni ; Schmidt, Sebastian ; Biselli, Manfred}, series = {Chemie Ingenieur Technik. 72 (2000), H. 7}, journal = {Chemie Ingenieur Technik. 72 (2000), H. 7}, isbn = {1522-2640}, pages = {746 -- 750}, year = {2000}, language = {de} } @article{BiselliJelinekSchmidtetal.2001, author = {Biselli, Manfred and Jelinek, N. and Schmidt, S. and Hilbert, U.}, title = {Neue Bioreaktoren zur Kultivierung h{\"a}matopoetischer Zellen / Jelinek, N. ; Schmidt, S. ; Hilbert, U. ; Thoma, S. ; Biselli, M. ; Wandrey, C.}, series = {Chemie Ingenieur Technik. 73 (2001), H. 7}, journal = {Chemie Ingenieur Technik. 73 (2001), H. 7}, isbn = {0009-286X}, pages = {894 -- 898}, year = {2001}, language = {de} } @article{BiselliJelinekSchmidtetal.2002, author = {Biselli, Manfred and Jelinek, N. and Schmidt, S. and Hilbert, U.}, title = {Novel bioreactors for the ex vivo cultivation of hematopoietic cells / Jelinek, N. ; Schmidt, S. ; Hilbert, U. ; Thoma, S. ; Biselli, M. ; Wandrey, C.}, series = {Engineering in Life Sciences. 2 (2002), H. 1}, journal = {Engineering in Life Sciences. 2 (2002), H. 1}, isbn = {1618-0240}, pages = {15 -- 18}, year = {2002}, language = {en} } @article{BiselliJelinekSchmidtetal.2001, author = {Biselli, Manfred and Jelinek, N. and Schmidt, S. and Noll, T.}, title = {Bioreaktoren zur Kultivierung blutbildender Zellen / Jelinek, N. ; Schmidt, S. ; Noll, T. ; Biselli, M.}, series = {Bioforum. 24 (2001), H. 6}, journal = {Bioforum. 24 (2001), H. 6}, isbn = {0940-0079}, pages = {418 -- 419}, year = {2001}, language = {de} } @article{BiselliKlyushnichenkoRodenbrocketal.1998, author = {Biselli, Manfred and Klyushnichenko, Vadim and Rodenbrock, Anja and Th{\"o}mmes, J{\"o}rg}, title = {Analysis of Hybridoma Cell Culture Processes by SDS-Gel Capillary Electrophoresis and matrix-assisted laser desorption ionization-time-of-flight MS / Vadim Klyushnichenko, Anja Rodenbrock, J{\"o}rg Th{\"o}mmes, Maria-Regina Kula, Holger Heine, Manfred Biselli}, series = {Biotechnology and Applied Biochemistry. 27 (1998), H. 3}, journal = {Biotechnology and Applied Biochemistry. 27 (1998), H. 3}, isbn = {0885-4513}, pages = {181 -- 188}, year = {1998}, language = {en} } @article{BiselliKraglWandrey2002, author = {Biselli, Manfred and Kragl, U. and Wandrey, C.}, title = {Reaction Engineering for Enzyme-Catalyzed Biotransformations}, series = {Enzyme catalysis in organic synthesis : a comprehensive handbook. Bd. 1. - 2., completely rev. and enl. ed. / ed. by Karlheinz Drauz.}, journal = {Enzyme catalysis in organic synthesis : a comprehensive handbook. Bd. 1. - 2., completely rev. and enl. ed. / ed. by Karlheinz Drauz.}, publisher = {Wiley-VCH}, address = {Weinheim}, isbn = {3-527-29949-1}, pages = {185 -- 257}, year = {2002}, language = {en} } @article{BiselliKraglWandrey1995, author = {Biselli, Manfred and Kragl, U. and Wandrey, C.}, title = {Reaction Engineering for Enzyme-Catalyzed Biotransformations}, series = {Enzyme catalysis in organic synthesis : a comprehensive handbook. Bd. 1. / ed. by Karlheinz Drauz.}, journal = {Enzyme catalysis in organic synthesis : a comprehensive handbook. Bd. 1. / ed. by Karlheinz Drauz.}, publisher = {Wiley-VCH}, address = {Weinheim}, isbn = {3-527-28479-6}, pages = {89 -- 155}, year = {1995}, language = {en} } @article{BiselliLuellauDreisbachetal.1992, author = {Biselli, Manfred and L{\"u}llau, E. and Dreisbach, C. and Grogg, A.}, title = {Immobilization of animal cells on chemically modified siran carrier / L{\"u}llau, E. ; Dreisbach, C. ; Grogg, A. ; Biselli, M. ; Wandrey, C.}, series = {Animal cell technology : developments, processes, and products ; ESACT, European Society for Animal Cell Technology, the 11th meeting / Ed. R. E. Spier}, journal = {Animal cell technology : developments, processes, and products ; ESACT, European Society for Animal Cell Technology, the 11th meeting / Ed. R. E. Spier}, publisher = {Butterworth-Heinemann}, address = {Oxford}, isbn = {0750604212}, pages = {469 -- 475}, year = {1992}, language = {en} } @article{BiselliLuellauWandrey1994, author = {Biselli, Manfred and L{\"u}llau, E. and Wandrey, Christian}, title = {Growth and metabolism of CHO-cells in porous glass carriers / L{\"u}llau, E. ; Biselli, M. ; Wandrey, C.}, series = {Animal cell technology : products of today, prospects for tomorrow ; ESACT, European Society for Animal Cell Technology, the 12th meeting / Ed. R. E. Spier}, journal = {Animal cell technology : products of today, prospects for tomorrow ; ESACT, European Society for Animal Cell Technology, the 12th meeting / Ed. R. E. Spier}, publisher = {Butterworth-Heinemann}, address = {Oxford}, isbn = {0750618450}, pages = {252 -- 255}, year = {1994}, language = {en} } @article{BiselliMachnikWandrey1996, author = {Biselli, Manfred and Machnik, M. and Wandrey, C.}, title = {Online-Immunoanalytik bei der kontinuierlichen Fermentation von Hybridomazellen / Machnik, M. ; Biselli, M. ; Wandrey, C.}, series = {BIO WORLD. 1 (1996), H. 3}, journal = {BIO WORLD. 1 (1996), H. 3}, isbn = {1424-8514}, pages = {12 -- 15}, year = {1996}, language = {de} } @article{BiselliMeissnerSchroederetal.1999, author = {Biselli, Manfred and Meissner, Petra and Schr{\"o}der, Bernd and Herfurth, Cornelia}, title = {Development of a fixed bed bioreactor for the expansion of human hematopoietic progenitor cells / Meissner, Petra ; Schr{\"o}der, Bernd ; Herfurth, Cornelia ; Biselli, Manfred}, series = {Cytotechnology. 30 (1999), H. 1}, journal = {Cytotechnology. 30 (1999), H. 1}, isbn = {0920-9069}, pages = {227 -- 234}, year = {1999}, language = {en} } @article{BiselliNoll1998, author = {Biselli, Manfred and Noll, T.}, title = {Dielectric spectroscopy in the cultivation of suspended and immobilized hybridoma cells / Noll, T.; Biselli, M.}, series = {Journal of Biotechnology. 63 (1998), H. 3}, journal = {Journal of Biotechnology. 63 (1998), H. 3}, isbn = {0168-1656}, pages = {187 -- 198}, year = {1998}, language = {en} } @article{BiselliNollWandrey1996, author = {Biselli, Manfred and Noll, T. and Wandrey, C.}, title = {Wirbelschichtreaktor und Biomasse-Monitor : ein leistungsf{\"a}higes Fermenationssystem f{\"u}r S{\"a}ugerzellen / Noll, T. ; Biselli, M. ; Wandrey, C.}, series = {Biospektrum. 2 (1996), H. 1}, journal = {Biospektrum. 2 (1996), H. 1}, isbn = {0947-0867}, pages = {65 -- 67}, year = {1996}, language = {de} } @article{BiselliNollWandrey1997, author = {Biselli, Manfred and Noll, T. and Wandrey, C.}, title = {On-line biomass monitoring of immobilized hybridoma cells by dielectrical measurements / Noll, T. ; Biselli, M. ; Wandrey, C.}, series = {Animal cell technology : from vaccines to genetic medicine ; [Vilamoura, Portugal, May 1996] / ed. by Manuel J. T. Carrondo}, journal = {Animal cell technology : from vaccines to genetic medicine ; [Vilamoura, Portugal, May 1996] / ed. by Manuel J. T. Carrondo}, publisher = {Kluwer}, address = {Dordrecht}, isbn = {0-7923-4321-2}, pages = {289 -- 294}, year = {1997}, language = {en} } @article{BiselliNollEisenkraetzeretal.2002, author = {Biselli, Manfred and Noll, Thomas and Eisenkr{\"a}tzer, Detlef and Kiesewetter, Andr{\´e}}, title = {Improved product formation in high density Chinese hamster ovary cell cultures transfected at confluency / Thomas Noll, Detlef Eisenkr{\"a}tzer, Andr{\´e} Kiesewetter, Andr{\´e} Dinter, Steffen Zeng, Christian Wandrey, Manfred Biselli und Eric G. Berger}, series = {Biotechnology Letters. 24 (2002), H. 11}, journal = {Biotechnology Letters. 24 (2002), H. 11}, isbn = {0141-5492}, pages = {861 -- 866}, year = {2002}, language = {en} } @article{BiselliNollJelineketal.2002, author = {Biselli, Manfred and Noll, Thomas and Jelinek, Nanni and Schmidt, Sebastian}, title = {Cultivation of Hematopoietic Stem and Progenitor Cells: biochemical Engineering Aspects / Thomas Noll, Nanni Jelinek, Sebastian Schmidt, Manfred Biselli und Christian Wandrey}, series = {Tools and Applications of Biochemical Engineering Science}, journal = {Tools and Applications of Biochemical Engineering Science}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-42250-1}, pages = {111 -- 128}, year = {2002}, language = {en} } @article{BiselliNollMuehlsiepenetal.2000, author = {Biselli, Manfred and Noll, Thomas and M{\"u}hlsiepen, Heinz and Engels, Ralf}, title = {A cell-culture reactor for the on-line evaluation of radiopharmaceuticals : evaluation of the lumped constant of FDG in human glioma cells / Noll, Thomas ; M{\"u}hlensiepen, Heinz ; Engels, Ralf ; Hamacher, Kurt ; Papaspyrou, Manfred ; Langen, Karl-Josef ; Bi}, series = {Journal of Nuclear Medicine. 41 (2000), H. 3}, journal = {Journal of Nuclear Medicine. 41 (2000), H. 3}, isbn = {0022-3123}, pages = {556 -- 564}, year = {2000}, language = {en} } @article{BiselliRechmannFriedrichetal.2007, author = {Biselli, Manfred and Rechmann, Hanrik and Friedrich, Andrea and Forouzan, Dara}, title = {Characterization of photosynthetically active duckweed ( Wolffia australiana ) in vitro culture by Respiration Activity Monitoring System (RAMOS) / Henrik Rechmann, Andrea Friedrich, Dara Forouzan, Stefan Barth, Heide Schnabl, Manfred Biselli und Robert B}, series = {Biotechnology Letters. 29 (2007), H. 6}, journal = {Biotechnology Letters. 29 (2007), H. 6}, isbn = {0141-5492}, pages = {971 -- 977}, year = {2007}, language = {en} } @article{BiselliRolefDunkeretal.1994, author = {Biselli, Manfred and Rolef, G. and Dunker, R. and Wandrey, Christian}, title = {Optimization of antibody production in a fluidized bed bioreactor / Rolef, G. ; Biselli, M. ; Dunker, R. ; Wandrey, C.}, series = {Animal cell technology : products of today, prospects for tomorrow ; ESACT, European Society for Animal Cell Technology, the 12th meeting / Ed. R. E. Spier}, journal = {Animal cell technology : products of today, prospects for tomorrow ; ESACT, European Society for Animal Cell Technology, the 12th meeting / Ed. R. E. Spier}, publisher = {Butterworth-Heinemann}, address = {Oxford}, isbn = {0750618450}, pages = {481 -- 484}, year = {1994}, language = {en} } @article{BiselliSchmidWandrey1988, author = {Biselli, Manfred and Schmid, Georg and Wandrey, Christian}, title = {Preparation of cellodextrins and isolation of oligomeric side components and their characterization / Schmid, Georg ; Biselli, Manfred ; Wandrey, Christian}, series = {Analytical Biochemistry. 175 (1988)}, journal = {Analytical Biochemistry. 175 (1988)}, isbn = {0003-2697}, pages = {573 -- 583}, year = {1988}, language = {en} } @article{BiselliSchmidtBuechsetal.1999, author = {Biselli, Manfred and Schmidt, S. and B{\"u}chs, J. and Born, C.}, title = {A new correlation for the wall-to-fluid mass transfer in liquid-sol fluidized beds / Schmidt, S. ; B{\"u}chs, J. ; Born, C. ; Biselli, M.}, series = {Chemical Engineering Science. 54 (1999), H. 6}, journal = {Chemical Engineering Science. 54 (1999), H. 6}, isbn = {0009-2509}, pages = {829 -- 839}, year = {1999}, language = {en} } @article{BiselliSchroederHerfurthetal.1997, author = {Biselli, Manfred and Schr{\"o}der, B. and Herfurth, C. and Meißner, P.}, title = {Differentiation of bone marrow cells immobilized on microcarriers in a fluidized bed reactor / Schr{\"o}der, B. ; Herfurth, C. ; Meißner, P. ; Biselli, M. ; Link, H. ; Wandrey, C.}, series = {Animal cell technology : from vaccines to genetic medicine ; [Vilamoura, Portugal, May 1996] / ed. by Manuel J. T. Carrondo}, journal = {Animal cell technology : from vaccines to genetic medicine ; [Vilamoura, Portugal, May 1996] / ed. by Manuel J. T. Carrondo}, publisher = {Kluwer}, address = {Dordrecht}, isbn = {0-7923-4321-2}, pages = {589 -- 593}, year = {1997}, language = {en} } @article{BiselliSchroederHerfurthetal.1997, author = {Biselli, Manfred and Schr{\"o}der, B. and Herfurth, C. and Schmoll, H.-J.}, title = {Cocultivation of hematopoietic cells in a fluidized bed reactor / Schr{\"o}der, B. ; Herfurth, C. ; Biselli, M. ; Schmoll, H.-J. ; Link, H. ; Ebell, W. ; Wandrey, C.}, series = {Animal cell technology : basic \& applied aspects : proceedings of the Eighth Annual Meeting of the Japanese Association for Animal Cell Technology, Iizuka, Fukuoka, Japan, November 6-10, 1995 / edited by K. Funatsu, Y. Shirai, and T. Matsushita}, journal = {Animal cell technology : basic \& applied aspects : proceedings of the Eighth Annual Meeting of the Japanese Association for Animal Cell Technology, Iizuka, Fukuoka, Japan, November 6-10, 1995 / edited by K. Funatsu, Y. Shirai, and T. Matsushita}, publisher = {Kluwer Acad. Press}, address = {Boston}, isbn = {0-7923-4486-3}, pages = {137 -- 141}, year = {1997}, language = {en} } @article{BiselliThoemmesBornetal.1995, author = {Biselli, Manfred and Th{\"o}mmes, J. and Born, C. and Wandrey, C.}, title = {Purification of monoclonal antibodies by fluidized bed adsorption / Th{\"o}mmes, J. ; Born, C. Biselli, M. ; Wandrey, C. ; Kula, M.-R.}, series = {Animal cell technology : developments towards the 21st century / edited by E. C. Beuvery}, journal = {Animal cell technology : developments towards the 21st century / edited by E. C. Beuvery}, publisher = {Kluwer Acad. Press}, address = {Dordrecht}, isbn = {0-7923-3736-0}, pages = {515 -- 519}, year = {1995}, language = {en} } @article{BiselliThoemmesGarskeetal.1992, author = {Biselli, Manfred and Th{\"o}mmes, J. and Garske, U. and Wandrey, Christian}, title = {Integrated detoxification: Reduction of ammonium concentration by dialysis with cation exchange membranes / Th{\"o}mmes, J. ; Garske, U. ; Biselli, M. ; Wandrey, C.}, series = {Animal cell technology : developments, processes, and products ; ESACT, European Society for Animal Cell Technology, the 11th meeting / Ed. R. E. Spier}, journal = {Animal cell technology : developments, processes, and products ; ESACT, European Society for Animal Cell Technology, the 11th meeting / Ed. R. E. Spier}, publisher = {Butterworth-Heinemann}, address = {Oxford}, isbn = {0750604212}, pages = {171 -- 175}, year = {1992}, language = {en} } @article{BiselliThoemmesGaetgensetal.1993, author = {Biselli, Manfred and Th{\"o}mmes, J. and G{\"a}tgens, J. and Runstadler, P. W.}, title = {The influence of dissolved oxygen tension on the metabolic activity of an immobilized hybridoma population / Th{\"o}mmes, J. ; G{\"a}tgens, J. ; Biselli, M. ; Runstadler, P.W. ; Wandrey, C.}, series = {Cytotechnology . 13 (1993), H. 1}, journal = {Cytotechnology . 13 (1993), H. 1}, isbn = {0920-9069}, pages = {29 -- 39}, year = {1993}, language = {en} } @article{BiselliThoemmesKulaetal.1994, author = {Biselli, Manfred and Th{\"o}mmes, J. and Kula, M.-R. and Wandrey, Christian}, title = {Batch kinetic data of hybridoma growth and productivity as a basis for the simulation of antibody production in various culture systems / Th{\"o}mmes, J. ; Biselli, M. ; Kula, M.-R. ; Wandrey, C.}, series = {Animal cell technology : products of today, prospects for tomorrow ; ESACT, European Society for Animal Cell Technology, the 12th meeting / Ed. R. E. Spier}, journal = {Animal cell technology : products of today, prospects for tomorrow ; ESACT, European Society for Animal Cell Technology, the 12th meeting / Ed. R. E. Spier}, publisher = {Butterworth-Heinemann}, address = {Oxford}, isbn = {0750618450}, pages = {513 -- 517}, year = {1994}, language = {en} } @article{BiselliVanderPolDeGooijeretal.1996, author = {Biselli, Manfred and Van der Pol, Jens J. and De Gooijer, Cornelis D. and Wandrey, Christian}, title = {Automation of selective assays for on-line bioprocess monitoring by flow-injection analysis / van der Pol, Jens J. ; de Gooijer, Cornelis D. ; Biselli, Manfred ; Wandrey, Christian ; Tramper, Johannes}, series = {Trends in Biotechnology. 14 (1996), H. 12}, journal = {Trends in Biotechnology. 14 (1996), H. 12}, isbn = {0167-7799}, pages = {471 -- 477}, year = {1996}, language = {en} } @article{BiselliVanderPolJokschetal.1992, author = {Biselli, Manfred and Van der Pol, Jens J. and Joksch, B. and Eberhardt, R.}, title = {Development of an enzymatic multichannel flow injection analysis system for monitoring mammalian cell fermentations / Van der Pol, J.J.; Joksch, B.; Eberhardt, R.; Biselli, M.; Wandrey, C., Tramper, J.}, series = {Biosensors : fundamentals, technologies and applications ; contributions to the BMFT status seminar with international participation May, 12 to 14, 1991, Internationales Bildungs-Centrum Bogensee/Brandenburg, Germany / org. by ZIM-Zentralinstitut f{\"u}r Molekularbiologie, Berlin-Buch and GBF, Braunschweig. Ed. by F. Scheller}, journal = {Biosensors : fundamentals, technologies and applications ; contributions to the BMFT status seminar with international participation May, 12 to 14, 1991, Internationales Bildungs-Centrum Bogensee/Brandenburg, Germany / org. by ZIM-Zentralinstitut f{\"u}r Molekularbiologie, Berlin-Buch and GBF, Braunschweig. Ed. by F. Scheller}, publisher = {VCH}, address = {Weinheim}, isbn = {3527284370}, pages = {349 -- 352}, year = {1992}, language = {en} } @article{BiselliVanderPolJokschetal.1994, author = {Biselli, Manfred and Van der Pol, Jens J. and Joksch, B. and Spohn, U.}, title = {On-line monitoring and control of glucose, glutamine, lactate and ammonium during a high-cell-density cultivation of hybridoma cells / van der Pol, Jens J. ; Joksch, B. ; Spohn, U. ; Biselli, M. ; Wandrey, C.}, series = {Proceedings of the sixth international meeting of the Japanese Association for Animal Cell Technology [JAACT 93]: Nagoya, Japan, November 9 - 12, 1993 / ed. by T. Kobayashi}, journal = {Proceedings of the sixth international meeting of the Japanese Association for Animal Cell Technology [JAACT 93]: Nagoya, Japan, November 9 - 12, 1993 / ed. by T. Kobayashi}, publisher = {Springer Netherland}, address = {Berlin}, isbn = {0-7923-3156-7}, pages = {167 -- 170}, year = {1994}, language = {en} } @article{BiselliVanderPolJokschetal.1995, author = {Biselli, Manfred and Van der Pol, Jens J. and Joksch, Burkhard and Galgens, Jochem}, title = {On-line control of an immobilized hybridoma culture with multi-channel flow injektion analysis / Jens J. van der Pol, Burkhard Joksch, Jochem Galgens, Manfred Biselli, Cornelis D. de Gooijer, Johannes Tramper and Christian Wandrey}, series = {Journal of Biotechnology. 43 (1995), H. 3}, journal = {Journal of Biotechnology. 43 (1995), H. 3}, isbn = {0168-1656}, pages = {229 -- 242}, year = {1995}, language = {en} } @article{BiselliVanderPolMachniketal.1997, author = {Biselli, Manfred and Van der Pol, Jens J. and Machnik, Marc and Portela-Klein, Theresa}, title = {On-line immunoanalysis of monoclonal antibodies during a continuous culture of hybridoma cells / Jens J. van der Pol, Marc Machnik, Manfred Biselli, Theresa Portela-Klein, Cornelis D. de Gooijer, Johannes Tramper und Christian Wandrey}, series = {Cytotechnology. 24 (1997), H. 1}, journal = {Cytotechnology. 24 (1997), H. 1}, isbn = {0920-9069}, pages = {19 -- 30}, year = {1997}, language = {en} } @article{BiselliVanderPolSpohnetal.1994, author = {Biselli, Manfred and Van der Pol, Jens J. and Spohn, Uwe and Eberhardt, Rolf}, title = {On-line monitoring of an animal cell culture with multi-channel flow injection analysis / van der Pol, Jens J.; Spohn, Uwe ; Eberhardt, Rolf ; G{\"a}tgens, Jochen ; Biselli, Manfred ; Wandrey, Christian ; Tramper, Johannes}, series = {Journal of Biotechnology. 37 (1994), H. 3}, journal = {Journal of Biotechnology. 37 (1994), H. 3}, isbn = {0168-1656}, pages = {253 -- 264}, year = {1994}, language = {en} } @article{BiselliWandrey1988, author = {Biselli, Manfred and Wandrey, Christian}, title = {Reaction Mechanism of an Endoglucanase of Trichoderma Reesei QM 9414 using Cellodextrins as Substrate}, series = {Technology of biological processes, safety in biotechnology, applied genetic engineering : lectures held at the 5th DECHEMA Annual Meeting of Biotechnologists, May 12 - 13, 1987, [Frankfurt, Main] / [hrsg. von Dieter Behrens ...]}, journal = {Technology of biological processes, safety in biotechnology, applied genetic engineering : lectures held at the 5th DECHEMA Annual Meeting of Biotechnologists, May 12 - 13, 1987, [Frankfurt, Main] / [hrsg. von Dieter Behrens ...]}, publisher = {VCH}, address = {Weinheim}, pages = {425 -- 429}, year = {1988}, language = {en} } @article{BiselliZengDinteretal.1997, author = {Biselli, Manfred and Zeng, Steffen and Dinter, Andre and Eisenkr{\"a}tzer, Detlef}, title = {Pilot Scale Expression and Purification of Soluble Protein A Tagged \&\#946;1,6N-Acetylglucosaminyltransferase in CHO Cells / Zeng, Steffen ; Dinter, Andre ; Eisenkr{\"a}tzer, Detlef ; Biselli, Manfred ; Wandrey, Christian ; Berger, Eric G.}, series = {Biochemical and Biophysical Research Communications. 237 (1997), H. 3}, journal = {Biochemical and Biophysical Research Communications. 237 (1997), H. 3}, isbn = {0006-291X}, pages = {653 -- 658}, year = {1997}, language = {en} } @article{BodeBartschBoulikasetal.1998, author = {Bode, J. and Bartsch, J. and Boulikas, T. and Iber, M. and Mielke, C. and Sch{\"u}beler, D. and Seibler, Jost and Benham, C.}, title = {Transcription-promoting genomic sites in mammalia: their elucidation and architectural principles}, series = {Gene therapy \& molecular biology}, volume = {1}, journal = {Gene therapy \& molecular biology}, number = {1}, issn = {1529-9120}, pages = {1 -- 29}, year = {1998}, language = {en} } @article{BodeSchlakeIberetal.2000, author = {Bode, J{\"u}rgen and Schlake, Thomas and Iber, Michaela and Sch{\"u}beler, Dirk and Seibler, Jost and Snezhkov, Evgeney and Nikolaev, Lev}, title = {The transgeneticist's toolbox: novel methods for the targeted modification of eukaryotic genomes}, series = {Biological Chemistry}, volume = {381}, journal = {Biological Chemistry}, number = {9-10}, issn = {1431-6730}, doi = {10.1515/BC.2000.103}, pages = {801 -- 813}, year = {2000}, language = {en} } @article{BongaertsBovenbergKraemeretal.2002, author = {Bongaerts, Johannes and Bovenberg, Roel and Kr{\"a}mer, Marco and M{\"u}ller, Ulrike and Raeven, Leon and Wubbolts, Marcel}, title = {Metabolic engineering to produce fine chemicals in Escherichia coli}, series = {Chemie - Ingenieur - Technik (CIT)}, volume = {Vol. 74}, journal = {Chemie - Ingenieur - Technik (CIT)}, number = {Iss. 5}, issn = {1522-2640 (E-Journal); 0009-286X (Print)}, pages = {694}, year = {2002}, language = {en} } @article{BongaertsEsserLorbachetal.2011, author = {Bongaerts, Johannes and Esser, Simon and Lorbach, Volker and Al-Momani, L{\´o}ay and M{\"u}ller, Michael A. and Franke, Dirk and Grondal, Christoph and Kurutsch, Anja and Bujnicki, Robert and Takors, Ralf and Raeven, Leon and Wubbolts, Marcel and Bovenberg, Roel and Nieger, Martin and Sch{\"u}rmann, Melanie and Trachtmann, Natalie and Kozak, Stefan and Sprenger, Georg A. and M{\"u}ller, Michael}, title = {Diversity-oriented production of metabolites derived from chorismate and their use in organic synthesis}, series = {Angewandte Chemie International Edition}, volume = {Vol. 50}, journal = {Angewandte Chemie International Edition}, number = {Iss. 34}, publisher = {Wiley}, address = {Weinheim}, issn = {1521-3773 (E-Journal); 0570-0833 (Print); 1433-7851 (Print)}, pages = {7781 -- 7786}, year = {2011}, language = {en} } @article{BongaertsKraemerMuelleretal.2001, author = {Bongaerts, Johannes and Kr{\"a}mer, Marco and M{\"u}ller, Ulrike and Raeven, Leon and Wubbolts, Marcel}, title = {Metabolic engineering for microbial production of aromatic amino acids and derived compounds}, series = {Metabolic engineering}, volume = {Vol. 3}, journal = {Metabolic engineering}, number = {Iss. 4}, issn = {1096-7184 (E-Journal); 1096-7176 (Print)}, pages = {289 -- 300}, year = {2001}, language = {en} } @article{BongaertsZoschkeWeidneretal.1995, author = {Bongaerts, Johannes and Zoschke, Sascha and Weidner, Uwe and Linden, Gottfried}, title = {Transcriptional regulation of the proton translocating NADH}, series = {Molecular microbiology}, volume = {Vol. 16}, journal = {Molecular microbiology}, number = {Iss. 3}, issn = {1365-2958 (E-Journal); 0950-382x (Print)}, pages = {521 -- 534}, year = {1995}, language = {en} } @article{BorgmeierBongaertsMeinhardt2012, author = {Borgmeier, Claudia and Bongaerts, Johannes and Meinhardt, Friedhelm}, title = {Genetic analysis of the Bacillus licheniformis degSU operon and the impact of regulatory mutations on protease production}, series = {Journal of biotechnology}, volume = {159}, journal = {Journal of biotechnology}, number = {1-2}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-4863 (E-Journal); 0168-1656 (Print)}, doi = {10.1016/j.jbiotec.2012.02.011}, pages = {12 -- 20}, year = {2012}, abstract = {Disruption experiments targeted at the Bacillus licheniformis degSU operon and GFP-reporter analysis provided evidence for promoter activity immediately upstream of degU. pMutin mediated concomitant introduction of the degU32 allele - known to cause hypersecretion in Bacillus subtilis - resulted in a marked increase in protease activity. Application of 5-fluorouracil based counterselection through establishment of a phosphoribosyltransferase deficient Δupp strain eventually facilitated the marker-free introduction of degU32 leading to further protease enhancement achieving levels as for hypersecreting wild strains in which degU was overexpressed. Surprisingly, deletion of rapG - known to interfere with DegU DNA-binding in B. subtilis - did not enhance protease production neither in the wild type nor in the degU32 strain. The combination of degU32 and Δupp counterselection in the type strain is not only equally effective as in hypersecreting wild strains with respect to protease production but furthermore facilitates genetic strain improvement aiming at biological containment and effectiveness of biotechnological processes.}, language = {en} } @article{BouwmanGuldenHeijdenetal.2013, author = {Bouwman, Peter and Gulden, Hanneke van der and Heijden, Ingrid van der and Drost, Rinske and Klijn, Christiaan N. and Prasetyanti, Pramudita and Pieterse, Mark and Wientjens, Ellen and Seibler, Jost and Hogervorst, Frank B. L. and Jonkers, Jos}, title = {A High-Throughput Functional Complementation Assay for Classification of BRCA1 Missense Variants}, series = {Cancer Discovery}, journal = {Cancer Discovery}, number = {3}, issn = {2159-8290}, doi = {10.1158/2159-8290.CD-13-0094}, pages = {1142 -- 1152}, year = {2013}, 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{BrabandYegenPaulssenetal.2005, author = {Braband, Henrik and Yegen, Eda and Paulßen, Elisabeth and Abram, Ulrich}, title = {[{ReN(PMe2Ph)3}{ReO3N}]2 - Structural Evidence for the Nitridotrioxorhenate(VII) Anion, [ReO3N]2-}, series = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie : ZAAC = Journal of inorganic and general chemistry}, volume = {631}, journal = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie : ZAAC = Journal of inorganic and general chemistry}, number = {12}, issn = {1521-3749}, doi = {10.1002/zaac.200500240}, pages = {2408 -- 2410}, year = {2005}, language = {en} } @article{BreuerMangSchoeningetal.2017, author = {Breuer, Lars and Mang, Thomas and Sch{\"o}ning, Michael Josef and Thoelen, Ronald and Wagner, Torsten}, title = {Investigation of the spatial resolution of a laser-based stimulation process for light-addressable hydrogels with incorporated graphene oxide by means of IR thermography}, series = {Sensors and Actuators A: Physical}, volume = {268}, journal = {Sensors and Actuators A: Physical}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0924-4247}, doi = {10.1016/j.sna.2017.11.031}, pages = {126 -- 132}, year = {2017}, language = {en} } @article{BreuerRaueKirschbaumetal.2015, author = {Breuer, Lars and Raue, Markus and Kirschbaum, M. and Mang, Thomas and Sch{\"o}ning, Michael Josef and Thoelen, R. and Wagner, Torsten}, title = {Light-controllable polymeric material based on temperature-sensitive hydrogels with incorporated graphene oxide}, series = {Physica status solidi (a)}, volume = {212}, journal = {Physica status solidi (a)}, number = {6}, publisher = {Wiley}, address = {Weinheim}, issn = {1862-6319}, doi = {10.1002/pssa.201431944}, pages = {1368 -- 1374}, year = {2015}, abstract = {Poly(N-isopropylacrylamide) (PNIPAAm) hydrogel films with incorporated graphene oxide (GO) were developed and tested as light-stimulated actuators. GO dispersions were synthesized via Hummers method and characterized toward their optical properties and photothermal energy conversion. The hydrogels were prepared by means of photopolymerization. In addition, the influence of GO within the hydrogel network on the lower critical solution temperature (LCST) was investigated by differential scanning calorimetry (DSC). The optical absorbance and the response to illumination were determined as a function of GO concentration for thin hydrogel films. A proof of principle for the stimulation with light was performed.}, language = {en} } @article{BreuerRaueStrobeletal.2016, author = {Breuer, Lars and Raue, Markus and Strobel, M. and Mang, Thomas and Sch{\"o}ning, Michael Josef and Thoelen, R. and Wagner, Torsten}, title = {Hydrogels with incorporated graphene oxide as light-addressable actuator materials for cell culture environments in lab-on-chip systems}, series = {Physica status solidi (a)}, volume = {213}, journal = {Physica status solidi (a)}, number = {6}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1862-6300}, doi = {10.1002/pssa.201533056}, pages = {1520 -- 1525}, year = {2016}, abstract = {Abstractauthoren Graphene oxide (GO) nanoparticles were incorporated in temperature-sensitive Poly(N-isopropylacrylamide) (PNIPAAm) hydrogels. The nanoparticles increase the light absorption and convert light energy into heat efficiently. Thus, the hydrogels with GO can be stimulated spatially resolved by illumination as it was demonstrated by IR thermography. The temporal progression of the temperature maximum was detected for different concentrations of GO within the polymer network. Furthermore, the compatibility of PNIPAAm hydrogels with GO and cell cultures was investigated. For this purpose, culture medium was incubated with hydrogels containing GO and the viability and morphology of chinese hamster ovary (CHO) cells was examined after several days of culturing in presence of this medium.}, language = {en} } @article{BurgerLindnerRumpfetal.2022, author = {Burger, Ren{\´e} and Lindner, Simon and Rumpf, Jessica and Do, Xuan Tung and Diehl, Bernd W.K. and Rehahn, Matthias and Monakhova, Yulia and Schulze, Margit}, title = {Benchtop versus high field NMR: Comparable performance found for the molecular weight determination of lignin}, series = {Journal of Pharmaceutical and Biomedical Analysis}, volume = {212}, journal = {Journal of Pharmaceutical and Biomedical Analysis}, number = {Article number: 114649}, publisher = {Elsevier}, address = {New York, NY}, isbn = {0731-7085}, doi = {10.1016/j.jpba.2022.114649}, year = {2022}, abstract = {Lignin is a promising renewable biopolymer being investigated worldwide as an environmentally benign substitute of fossil-based aromatic compounds, e.g. for the use as an excipient with antioxidant and antimicrobial properties in drug delivery or even as active compound. For its successful implementation into process streams, a quick, easy, and reliable method is needed for its molecular weight determination. Here we present a method using 1H spectra of benchtop as well as conventional NMR systems in combination with multivariate data analysis, to determine lignin's molecular weight (Mw and Mn) and polydispersity index (PDI). A set of 36 organosolv lignin samples (from Miscanthus x giganteus, Paulownia tomentosa and Silphium perfoliatum) was used for the calibration and cross validation, and 17 samples were used as external validation set. Validation errors between 5.6\% and 12.9\% were achieved for all parameters on all NMR devices (43, 60, 500 and 600 MHz). Surprisingly, no significant difference in the performance of the benchtop and high-field devices was found. This facilitates the application of this method for determining lignin's molecular weight in an industrial environment because of the low maintenance expenditure, small footprint, ruggedness, and low cost of permanent magnet benchtop NMR systems.}, language = {en} } @article{BurgerRumpfDoetal.2021, author = {Burger, Ren{\´e} and Rumpf, Jessica and Do, Xuan Tung and Monakhova, Yulia and Diehl, Bernd W. K. and Rehahn, Matthias and Schulze, Margit}, title = {Is NMR combined with multivariate regression applicable for the molecular weight determination of randomly cross-linked polymers such as lignin?}, series = {ACS Omega}, volume = {6}, journal = {ACS Omega}, number = {44}, publisher = {ACS Publications}, address = {Washington, DC}, issn = {2470-1343}, doi = {10.1021/acsomega.1c03574}, pages = {29516 -- 29524}, year = {2021}, abstract = {The molecular weight properties of lignins are one of the key elements that need to be analyzed for a successful industrial application of these promising biopolymers. In this study, the use of 1H NMR as well as diffusion-ordered spectroscopy (DOSY NMR), combined with multivariate regression methods, was investigated for the determination of the molecular weight (Mw and Mn) and the polydispersity of organosolv lignins (n = 53, Miscanthus x giganteus, Paulownia tomentosa, and Silphium perfoliatum). The suitability of the models was demonstrated by cross validation (CV) as well as by an independent validation set of samples from different biomass origins (beech wood and wheat straw). CV errors of ca. 7-9 and 14-16\% were achieved for all parameters with the models from the 1H NMR spectra and the DOSY NMR data, respectively. The prediction errors for the validation samples were in a similar range for the partial least squares model from the 1H NMR data and for a multiple linear regression using the DOSY NMR data. The results indicate the usefulness of NMR measurements combined with multivariate regression methods as a potential alternative to more time-consuming methods such as gel permeation chromatography.}, language = {en} } @article{BurmistrovaSobolevaMonakhova2021, author = {Burmistrova, Natalia A. and Soboleva, Polina M. and Monakhova, Yulia}, title = {Is infrared spectroscopy combined with multivariate analysis a promising tool for heparin authentication?}, series = {Journal of Pharmaceutical and Biomedical Analysis}, volume = {194}, journal = {Journal of Pharmaceutical and Biomedical Analysis}, number = {Article number: 113811}, publisher = {Elsevier}, address = {Amsterdam}, isbn = {0731-7085}, doi = {10.1016/j.jpba.2020.113811}, year = {2021}, abstract = {The investigation of the possibility to determine various characteristics of powder heparin (n = 115) was carried out with infrared spectroscopy. The evaluation of heparin samples included several parameters such as purity grade, distributing company, animal source as well as heparin species (i.e. Na-heparin, Ca-heparin, and heparinoids). Multivariate analysis using principal component analysis (PCA), soft independent modelling of class analogy (SIMCA), and partial least squares - discriminant analysis (PLS-DA) were applied for the modelling of spectral data. Different pre-processing methods were applied to IR spectral data; multiplicative scatter correction (MSC) was chosen as the most relevant. Obtained results were confirmed by nuclear magnetic resonance (NMR) spectroscopy. Good predictive ability of this approach demonstrates the potential of IR spectroscopy and chemometrics for screening of heparin quality. This approach, however, is designed as a screening tool and is not considered as a replacement for either of the methods required by USP and FDA.}, language = {en} } @article{BaeckerBegingBisellietal.2009, author = {B{\"a}cker, Matthias and Beging, Stefan and Biselli, Manfred and Poghossian, Arshak and Wang, J. and Zang, Werner and Wagner, Patrick and Sch{\"o}ning, Michael Josef}, title = {Concept for a solid-state multi-parameter sensor system for cell-culture monitoring}, series = {Electrochimica Acta. 54 (2009), H. 25 Sp. Iss. SI}, journal = {Electrochimica Acta. 54 (2009), H. 25 Sp. Iss. SI}, publisher = {Elsevier}, address = {Amsterdam}, isbn = {0013-4686}, pages = {6107 -- 6112}, year = {2009}, language = {en} } @article{BaeckerDellePoghossianetal.2011, author = {B{\"a}cker, Matthias and Delle, L. and Poghossian, Arshak and Biselli, Manfred and Zang, Werner and Wagner, P. and Sch{\"o}ning, Michael Josef}, title = {Electrochemical sensor array for bioprocess monitoring}, series = {Electrochimica Acta (2011)}, volume = {56}, journal = {Electrochimica Acta (2011)}, number = {26}, publisher = {Elsevier}, address = {Amsterdam}, pages = {9673 -- 9678}, year = {2011}, language = {en} } @article{BaeckerRakowskiPoghossianetal.2013, author = {B{\"a}cker, Matthias and Rakowski, D. and Poghossian, Arshak and Biselli, Manfred and Wagner, Patrick and Sch{\"o}ning, Michael Josef}, title = {Chip-based amperometric enzyme sensor system for monitoring of bioprocesses by flow-injection analysis}, series = {Journal of Biotechnology}, volume = {163}, journal = {Journal of Biotechnology}, number = {4}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0168-1656}, doi = {10.1016/j.jbiotec.2012.03.014}, pages = {371 -- 376}, year = {2013}, abstract = {A microfluidic chip integrating amperometric enzyme sensors for the detection of glucose, glutamate and glutamine in cell-culture fermentation processes has been developed. The enzymes glucose oxidase, glutamate oxidase and glutaminase were immobilized by means of cross-linking with glutaraldehyde on platinum thin-film electrodes integrated within a microfluidic channel. The biosensor chip was coupled to a flow-injection analysis system for electrochemical characterization of the sensors. The sensors have been characterized in terms of sensitivity, linear working range and detection limit. The sensitivity evaluated from the respective peak areas was 1.47, 3.68 and 0.28 μAs/mM for the glucose, glutamate and glutamine sensor, respectively. The calibration curves were linear up to a concentration of 20 mM glucose and glutamine and up to 10 mM for glutamate. The lower detection limit amounted to be 0.05 mM for the glucose and glutamate sensor, respectively, and 0.1 mM for the glutamine sensor. Experiments in cell-culture medium have demonstrated a good correlation between the glutamate, glutamine and glucose concentrations measured with the chip-based biosensors in a differential-mode and the commercially available instrumentation. The obtained results demonstrate the feasibility of the realized microfluidic biosensor chip for monitoring of bioprocesses.}, language = {en} }