TY  - JOUR
A1  - Kuropka, Rolf
A1  - Müller, Bettina
A1  - Höcker, Hartwig
A1  - Berndt, Heinz
T1  - Chiral stationary phases via hydrosilylation reaction of N-acryloylamino acids : I. Stationary phase with one chiral centre for high-performance liquid chromatography and development of a new derivatization pattern for amino acid enantiomers
JF  - Journal of chromatography A
Y1  - 1989
SN  - 0021-9673
IS  - 481
SP  - 380
EP  - 386
ER  - 
TY  - JOUR
A1  - Bäcker, Matthias
A1  - Rakowski, D.
A1  - Poghossian, Arshak
A1  - Biselli, Manfred
A1  - Wagner, Patrick
A1  - Schöning, Michael Josef
T1  - Chip-based amperometric enzyme sensor system for monitoring of bioprocesses by flow-injection analysis
JF  - Journal of Biotechnology
N2  - 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.
Y1  - 2013
U6  - https://doi.org/10.1016/j.jbiotec.2012.03.014
SN  - 0168-1656
VL  - 163
IS  - 4
SP  - 371
EP  - 376
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Dünnwald, Thomas
A1  - Demir, Ayhan S.
A1  - Siegert, Petra
A1  - Pohl, Martina
A1  - Müller, Michael
T1  - ChemInform Abstract: Enantioselective synthesis of (S)-2-Hydroxypropanone derivatives by Benzoylformate Decarboxylase Catalyzed C—C Bond Formation
JF  - Cheminform
Y1  - 2001
SN  - 1522-2667 (E-Journal); 0931-7597 (Print)
VL  - Vol. 32
IS  - Iss. 4
SP  - Publ. online
ER  - 
TY  - JOUR
A1  - Scherer, Ulrich W.
A1  - Kratz, J. V.
A1  - Zimmermann, H. P.
A1  - Schädel, M.
T1  - Chemical Properties of Element 105 in Aqueous Solutions: Halide Complex Formation and Anion Exchange into Triisooctylamine / J.V. Kratz, H.P. Zimmermann, U.W. Scherer, M. Schädel, W. Brüchle, K.E. Gregorich, C.M. Gannett, H.L. Hall, R.A. Henderson, D.M. L
JF  - Radiochimica Acta. 48 (1989)
Y1  - 1989
SN  - 0033-8230
SP  - 121
ER  - 
TY  - JOUR
A1  - Scherer, Ulrich W.
A1  - Gober, M. K.
A1  - Kratz, J. V.
A1  - Zimmermann, H. P.
T1  - Chemical Properties of Element 105 in Aqueous Solution: Extractions into Diisobutylcarbinol / M.K. Gober, J.V. Kratz, H.P. Zimmermann, M. Schädel, W. Brüchle, E. Schimpf, K.E. Gregorich, A. Türler, N.J. Hannink, K.R. Czerwinski, B. Kadkhodayan, D.M. Lee,
JF  - Radiochimica Acta. 57 (1992)
Y1  - 1992
SN  - 0033-8230
SP  - 77
EP  - 84
ER  - 
TY  - JOUR
A1  - Scherer, Ulrich W.
A1  - Schädel, M.
A1  - Brüchle, W.
A1  - Schimpf, E.
T1  - Chemical Properties of Element 105 in Aqueous Solution: Cation Exchange Separations with α-Hydroxyisobutyric Acid / M. Schädel, W. Brüchle, E. Schimpf, H.P. Zimmermann, M.K. Gober, J.V. Kratz,  N. Trautmann, H. Gäggeler, D. Jost, J. Kovacs, U.W. Sche
JF  - Radiochimica Acta. 57 (1992)
Y1  - 1992
SN  - 0033-8230
SP  - 85
EP  - 92
ER  - 
TY  - JOUR
A1  - Scherer, Ulrich W.
A1  - Zimmermann, H. P.
A1  - Gober, M. K.
A1  - Kratz, J. V.
T1  - Chemical Properties of Element 105 in Aqueous Solution: Back Extraction from Triisooctyl Amine into 0.5M HCl / H.P. Zimmermann, M.K. Gober, J.V. Kratz, M. Schädel, E. Schimpf, K.E. Gregorich, A. Türler, K.R. Czerwinski, N.J. Hannink, B. Kadkhodayan, D.M.
JF  - Radiochimica Acta. 60 (1993)
Y1  - 1993
SN  - 0033-8230
SP  - 11
ER  - 
TY  - CHAP
A1  - Muffler, Kai
A1  - Tippkötter, Nils
A1  - Ulber, Roland
ED  - Timmis, Kenneth N.
T1  - Chemical feedstocks and fine chemicals from other substrates
T2  - Handbook of hydrocarbon and lipid microbiology. Volume 4:  Consequences of microbial interactions with hydrocarbons, oils and lipids. - (Springer reference)
Y1  - 2010
SN  - 978-3-540-77588-1
U6  - https://doi.org/10.1007%2F978-3-540-77587-4_214
SP  - 2891
EP  - 2902
PB  - Springer
CY  - Berlin [u.a.]
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Jahnke, J.
T1  - 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.
JF  - Hydrobiological Bulletin . 17 (1983), H. 1
Y1  - 1983
SN  - 0165-1404
SP  - 5
EP  - 20
ER  - 
TY  - JOUR
A1  - Kotter, Michael
A1  - Lovera, P.
A1  - Riekert, L.
T1  - Charakterisierung eines Trägerkatalysators durch effektive Diffusionskoeffizienten, Labyrinthfaktor und mittlere Porenradien
JF  - Berichte der Bunsen-Gesellschaft für Physikalische Chemie
N2  - Der effektive Diffusionskoeffizient Deff von Gasen in einem porösen Medium hängt im Knudsen- bzw. Übergangsgebiet vom effektiven Porenradius 〈r〉 der Struktur ab. 〈r〉 kann aus Deff ermittelt werden, sofern der Labyrinthfaktor χ der Struktur aus der Kinetik des Stoffaustausches in den mit einer flüssigen Phase gefüllten Poren separat bestimmt wird. An einem Trägerkatalysator (CuO auf γ-Al₂O₃) ergab sich auf diese Weise ein für die Diffusion maßgebender effektiver Porenradius, der in den Bereich der Makroporen fällt. Ein Vergleich mit dem aus reaktionskinetischen Daten ermittelten effektiven Diffusionskoeffizienten läßt auf eine ungleichmäßige Verteilung der aktiven Komponente im Kontaktkorn schließen.
Y1  - 1976
SN  - 0005-9021
U6  - https://doi.org/10.1002/bbpc.19760800112
VL  - 80
IS  - 1
SP  - 61
EP  - 66
PB  - Wiley-VCH
CY  - Weinheim
ER  -