TY  - CHAP
A1  - Tippkötter, Nils
A1  - Roikaew, W.
A1  - Ulber, R.
T1  - An automated pilot plant for the bioengineering processing of concentrated whey
T2  - European BioPerspectives : in cooperation with BIOTECHNICA 2008 : 7 - 9 October 2008 Hannover, Germany ; book of abstracts ; abstracts, poster programme
Y1  - 2008
SP  - 98
PB  - Dechema
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Tippkötter, Nils
A1  - Deterding, A.
A1  - Ulber, Roland
T1  - Determination of acetic acid in fermentation broth by gas-diffusion technique
JF  - Engineering in Life Sciences
N2  - Due to the interfering effects of acetic acid in many fermentation processes, a gas-diffusion technique was developed for the online determination of acetic acid. The measurements were accomplished with a flow diffusion analysis (FDA) unit from the TRACE Analytics GmbH, Braunschweig, Germany. The diffusion analysis is based on the UV-absorbance of acetic acid at 205 nm. The measurement was achieved by the separation of an acceptor and a carrier stream (acidified fermentation broth) using a gas permeable polytetrafluoroethylene (PTFE) membrane, whereby broth constituents that would otherwise disturb the UV-measurement of acetic acid, are held back efficiently. Merely, the fermentation by-products, e.g. formic acid, is capable of diffusing through the membrane. While formic acid can disturb the measurement, carbon dioxide does not absorb at 205 nm. The method operates with time-dependent sample enrichment. During the analysis, a small volume of the acceptor stream is stopped for a defined time interval in the acceptor chamber. During this period, the gaseous acetic acid diffuses through the membrane and is enriched in the acceptor chamber. Subsequently after the enrichment, the acceptor stream flows through a UV-detector. The intensity of the signal is proportional to the acetic acid concentration. Online measurements in bioreactors via a sterile filtration probe have been accomplished. A linear calibration in the range of 0.5–5.0 g/L acetic acid with a relative standard deviation of <5 % was obtained. A sampling rate of 8 samples per hour was possible. The system was applied for the determination of acetic acid in E. coli fermentation broth. The instrument is easy to clean, very user-friendly and does not require any toxic or expensive reagents.
Y1  - 2008
U6  - http://dx.doi.org/10.1002/elsc.200820227
VL  - 8
IS  - 1, Special Issue: Technical Systems for the Use in Life Sciences
SP  - 62
EP  - 67
ER  - 
TY  - JOUR
A1  - Timme, Michael
A1  - Hülk, Fabian
T1  - Mieterhöhungsverlangen bei unwirksamer Schönheitsreparaturklausel
JF  - Monatsschrift für deutsches Recht : MdR ; Zeitschrift für die Zivilrechtspraxis. 28 (2008), H. 22
Y1  - 2008
SN  - 0340-1812
SP  - 1249
EP  - 1251
ER  - 
TY  - JOUR
A1  - Timme, Michael
T1  - Vollstreckung in Steuererstattungsanspruch - Verfahrensrechte im Festsetzungsverfahren
JF  - Neue juristische Wochenschrift : NJW. 61 (2008), H. 23
Y1  - 2008
SN  - 0341-1915
N1  - in der Bereichsbibliothek Eupener Str. vorhanden unter 43 Z 093
SP  - 1675
EP  - 1677
ER  - 
TY  - JOUR
A1  - Timme, Michael
T1  - Mietkaution in der Insolvenz des Vermieters
JF  - Neue Zeitschrift für Miet- und Wohnungsrecht : NZM. 11 (2008), H. 12
Y1  - 2008
SN  - 1434-677X
SP  - 429
EP  - 431
ER  - 
TY  - JOUR
A1  - Timme, Michael
T1  - §§ 24-28 Wettbewerbsregeln
JF  - Münchener Kommentar zum Europäischen und Deutschen Wettbewerbsrecht  (Kartellrecht) / Hirsch, Günter [Hrsg.] : Bd. 2 Gesetz gegen Wettbewerbsbeschränkungen (GWB) §§ 1-96, 130, 131
Y1  - 2008
SN  - 978-3-406-54276-3
SP  - 231
EP  - 249
PB  - Beck
CY  - München
ER  - 
TY  - JOUR
A1  - Timme, Michael
T1  - Haftung des Kommanditisten bei Rückzahlung eines Agios
JF  - Monatsschrift für deutsches Recht : MdR ; Zeitschrift für die Zivilrechtspraxis. 62 (2008), H. 17
Y1  - 2008
SN  - 0340-1812
SP  - 959
EP  - 962
ER  - 
TY  - JOUR
A1  - Timme, Michael
T1  - Schriftformmangel trotz Heilungsklausel?
JF  - Neue Zeitschrift für Miet- und Wohnungsrecht : NZM. 11 (2008)
Y1  - 2008
SN  - 1434-677X
SP  - 764
EP  - 767
ER  - 
TY  - JOUR
A1  - Timme, Michael
T1  - Die persönliche Haftung des Kommanditisten bei Rückzahlung eines Agios
JF  - Monatsschrift für deutsches Recht : MdR ; Zeitschrift für die Zivilrechts-Praxis. 28 (2008), H. 17
Y1  - 2008
SN  - 0340-1812
SP  - 959
EP  - 960
ER  - 
TY  - BOOK
A1  - Tietze, Jürgen
T1  - Einführung in die angewandte Wirtschaftsmathematik /  [Hauptbd.] 14., aktualisierte Aufl.
Y1  - 2008
SN  - 978-3-8348-0514-0
PB  - Vieweg
CY  - Braunschweig
ER  -