TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Stahlberg, R.
T1 - Das Thermoselect-Verfahren zur Energie- und Rohstoffgewinnung – Konzepte, Verfahren, Kosten
JF - Thermische Abfallentsorgung – Konzepte, Kosten, Verfahren. Tagung Veitshöchheim, 27./28.06.1995, VDI-Gesellschaft Energietechnik
Y1 - 1995
SN - 0083-5560
N1 - VDI-Bericht 1192
SP - 319
EP - 319
PB - VDI-Verl.
CY - Düsseldorf
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Stahlberg, R.
T1 - Thermoselect – Energie- und Rohstoffgewinnung, Verfahrensgrundlagen zur unterbrechungslosen Verwertung von Restabfällen. Stahlberg, R.; Feuerriegel, U.
JF - Thermoselect : der neue Weg, Restmüll umweltgerecht zu behandeln ; [Tagungsband zur Fachtagung Thermoselect am 19. Januar 1995 in Rastatt/Baden] / Günther Häßler. 2. durchges. und erw. Aufl.
Y1 - 1995
SN - 3-9803665-4-5
N1 - Fachtagung THERMOSELECT ; (1995, Rastatt) ; Fachtagung Thermoselect ; (1995.01.19 : ; Rastatt)
SP - 13
EP - 32
PB - Goerner
CY - Karlsruhe
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Stahlberg, R.
T1 - Untersuchungen an der Thermoselect-Anlage Fondotoce (Italien), Qualitäten der Produkte und Nachweis der Verteilung der chemischen Elemente in den Stoffströmen. Stahlberg, R.; Feuerriegel, U.
JF - Thermoselect : der neue Weg, Restmüll umweltgerecht zu behandeln ; [Tagungsband zur Fachtagung Thermoselect am 19. Januar 1995 in Rastatt/Baden] / Günther Häßler. 2. durchges. und erw. Aufl.
Y1 - 1995
SN - 3-9803665-4-5
N1 - Fachtagung THERMOSELECT ; (1995, Rastatt) ; Fachtagung Thermoselect ; (1995.01.19 : ; Rastatt)
SP - 33
EP - 54
PB - Goerner
CY - Karlsruhe
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Stahlberg, R.
T1 - Thermoselect – Energie- und Rohstoffgewinnung. Stahlberg, R. ; Feuerriegel, U.
JF - Abfallwirtschaft Stoffkreisläufe / Terratec '95, Kongress West-Ost-Transfer Umwelt vom 1. bis 3. März 1995. Leipziger Messe. Hrsg. von Hasso Scheffler ...
Y1 - 1995
SN - 3-8154-3513-7
N1 - Terratec <1995, Leipzig> ; Kongress West-Ost-Transfer Umwelt <1995, Leipzig> ; Leipziger Messe
SP - 179
EP - 194
PB - Teubner
CY - Stuttgart [u.a.]
ER -
TY - CHAP
A1 - Feuerriegel, Uwe
A1 - Pook, Michael
A1 - Wersch, Gregor
A1 - Wittenhorst, Simon
A1 - Becker, Jürgen
A1 - Ecker, Markus
A1 - Hoffmann, Ulrich
A1 - Kunz, Ulrich
T1 - Simulation von Wärmeübertragungsprozessen
N2 - Mit freundlicher Genehmigung der Autoren und des Oldenbourg Industrieverlags https://www.oldenbourg-industrieverlag.de/de/9783835633223-33223 erschienen als Beitrag im Tagungsband zur AALE-Tagung 2012. 9. Fachkonferenz 4.-5. Mai 2012, Aachen, Fachhochschule. ISBN 9783835633223 S 5-1 S. 127-135 Es werden Ergebnisse unterschiedlicher Projekte aus dem Bereich der Simulation von Wärmeübertragungsprozessen mit Excel-VBA vorgestellt. - Thermische Behandlung hochviskoser Fruchtzubereitungen, verschiedene Projekte und Kooperationen mit der Zentis GmbH & Co. KG, Aachen (J. Becker, U. Feuerriegel, G. Wersch). - Untersuchung des dynamischen Verhaltens von dampfbeheizten Ethylen-Verdampfern. Projekt mit der TGE Gas Engineering GmbH, Bonn (M. Ecker, U. Feuerriegel, U. Hoffmann, S. Wittenhorst). - Dynamische Simulation des axialen Temperaturverlaufs von elektrisch beheizten Rohrreaktoren. Kooperation mit dem Institut für Chemische Verfahrenstechnik, TU Clausthal (U. Feuerriegel, U. Kunz, M. Pook, S. Wittenhorst).
KW - Wärmeübertragung
Y1 - 2012
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Ma, J.
A1 - Hoffmann, U.
T1 - Untersuchungen zur Rußfilterregeneration mit Hilfe von Zündhilfen. Ma, J.; Hoffmann, U.; Feuerriegel, U
JF - Erdöl und Kohle – Erdgas, Brennstoff-Chemie. 43 (1990)
Y1 - 1990
SN - 0014-0058
N1 - Druckausgabe in Jülich unter 63 ZS 034-1990 vorhanden
SP - 150
EP - 157
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Künsch, M.
A1 - Stahlberg, R.
A1 - Steiger, F.
T1 - Massen- und Energiebilanz des Thermoselect-Verfahrens
JF - Thermoselect-Verfahren zur Ent- und Vergasung von Abfällen / Franz J. Schweitzer [Hrsg.]
Y1 - 1994
SN - 3-924511-47-0
PB - EF-Verl. für Energie- u. Umwelttechnik
CY - Berlin
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Klose, W.
A1 - Sloboshanin, S.
A1 - Goebel, H. [u.a.]
T1 - Deactivation of a palladium-supported alumina catalyst by hydrogen sulfide during the oxidation of methane
JF - Langmuir: the ACS journal of surfaces and colloids. 10 (1994), H. 10
Y1 - 1994
SN - 0743-74363
SP - 3567
EP - 3570
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Klose, W.
T1 - Reaktionskinetik der katalytischen Methan-Oxidation und experimentelle Untersuchungen zur Desaktivierung eines Palladium-Trägerkatalysators durch Schwefelwasserstoff. Klose, W. ; Feuerriegel, U.
JF - Chemie - Ingenieur - Technik. 65 (1993), H. 10
Y1 - 1993
SN - 0009-286X
N1 - engl. Titel: Reaction Kinetics of Catalytic Methane Oxidation and Deactivation of a Palladium Catalyst by Hydrogen Sulfide During Catalytic Oxidation of Methane
SP - 1242
EP - 1243
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Klose, W.
T1 - Untersuchungen zum Mechanismus der Desaktivierung eines Palladium-Trägerkatalysators durch Vergiftung mit Schwefelwasserstoff
JF - Chemie - Ingenieur - Technik. 70 (1998), H. 4
Y1 - 1998
SN - 0009-286X
N1 - Artikel in Englisch unter Chemical engineering & technology. 21(1998)7. S. 562-564
SP - 449
EP - 452
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Klose, W.
T1 - Investigations into the Mechanism of the Deactivation of a Palladium-Supported Catalyst by Hydrogen Sulfide Poisoning. Klose, W. ; Feuerriegel, U.
JF - Chemical engineering & technology. 21 (1998), H. 7
Y1 - 1998
SN - 0930-7516
N1 - gleicher Artikel in Deutsch In: Chem.Ing.Tech 70(1998) No S. 449-452 u.d.T.: Untersuchungen zum Mechanismus der Desaktivierung eines Palladium-Trägerkatalysators durch Vergiftung mit Schwefelwasserstoff
SP - 562
EP - 564
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
A1 - Hoffmann, Ulrich
A1 - Walenzik, C.
A1 - Kögel, J.
T1 - Für Scale-up´s und Betriebsmuster, Projekt Trocknungstechnik an der FH Aachen
JF - CITplus : das Praxismagazin für Verfahrenstechnik und Apparatebau. 4 (2001)
Y1 - 2001
SN - 1436-2597
SP - 24
EP - 25
ER -
TY - BOOK
A1 - Feuerriegel, Uwe
T1 - Zur Desaktivierung eines Desaktivierung eines Palladium-Trägerkatalysators durch Schwefel¬wasserstoff bei der katalytischen Methanoxidation
Y1 - 1993
N1 - Dissertation
PB - Univ.-Gesamthochsch.
CY - Kassel
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
T1 - Energetische Verwertung von Kunststoffabfällen
JF - Chemie und Technologie makromolekularer Stoffe :, 16. Kolloquium. / Fachhochschule / Fachbereich Chemieingenieurwesen. 20. November 1998 an der FH Aachen, Fachbereich Chemieingenieurwesen
Y1 - 1998
N1 - FH-Texte. 69; In Jülich unter der Signatur: 61 ZOW 405-16
SP - 169
EP - 189
PB - Fachhochschule Aachen
CY - Aachen
ER -
TY - JOUR
A1 - Feuerriegel, Uwe
T1 - Trennen und Trocknen. FH Aachen verfügt über einen Zentrifugentrockner im Technikumsmaßstab
JF - Lebensmitteltechnik. 33 (2001), H. 7-8
Y1 - 2001
SN - 0047-4290
SP - 22
EP - 23
ER -
TY - BOOK
A1 - Feuerriegel, Uwe
T1 - Verfahrenstechnik mit EXCEL: Verfahrenstechnische Berechnungen effektiv durchführen und professionell dokumentieren
Y1 - 2016
SN - 978-3-658-02902-9
U6 - https://doi.org/10.1007/978-3-658-02903-6
N1 - 152 Abbildungen, 94 Abbildungen in Farbe
Gedruckt in der Bibliothek unter der Signatur: 21 ZNK 11
PB - Springer Fachmedien
CY - Wiesbaden
ER -
TY - JOUR
A1 - Feng, Yong-Qing
A1 - Seibler, Jost
A1 - Alami, Raouf
A1 - Eisen, Andrew
A1 - Westerman, Karen A.
A1 - Leboulch, Philippe
A1 - Fiering, Steven
A1 - Bouhassira, Eric E.
T1 - Site-specific chromosomal integration in mammalian cells: highly efficient CRE recombinase-mediated cassette exchange
JF - Journal of Molecular Biology
Y1 - 1999
U6 - https://doi.org/10.1006/jmbi.1999.3113
SN - 0022-2836
VL - 292
IS - 4
SP - 779
EP - 785
ER -
TY - JOUR
A1 - Falkenberg, Fabian
A1 - Voß, Leonie
A1 - Bott, Michael
A1 - Bongaerts, Johannes
A1 - Siegert, Petra
T1 - New robust subtilisins from halotolerant and halophilic Bacillaceae
JF - Applied Microbiology and Biotechnology
N2 - The aim of the present study was the characterisation of three true subtilisins and one phylogenetically intermediate subtilisin from halotolerant and halophilic microorganisms. Considering the currently growing enzyme market for efficient and novel biocatalysts, data mining is a promising source for novel, as yet uncharacterised enzymes, especially from halophilic or halotolerant Bacillaceae, which offer great potential to meet industrial needs. Both halophilic bacteria Pontibacillus marinus DSM 16465ᵀ and Alkalibacillus haloalkaliphilus DSM 5271ᵀ and both halotolerant bacteria Metabacillus indicus DSM 16189 and Litchfieldia alkalitelluris DSM 16976ᵀ served as a source for the four new subtilisins SPPM, SPAH, SPMI and SPLA. The protease genes were cloned and expressed in Bacillus subtilis DB104. Purification to apparent homogeneity was achieved by ethanol precipitation, desalting and ion-exchange chromatography. Enzyme activity could be observed between pH 5.0–12.0 with an optimum for SPPM, SPMI and SPLA around pH 9.0 and for SPAH at pH 10.0. The optimal temperature for SPMI and SPLA was 70 °C and for SPPM and SPAH 55 °C and 50 °C, respectively. All proteases showed high stability towards 5% (w/v) SDS and were active even at NaCl concentrations of 5 M. The four proteases demonstrate potential for future biotechnological applications.
KW - Biotechnological application
KW - Bacillaceae
KW - Subtilisin
KW - Subtilases
KW - Halotolerant protease
Y1 - 2023
U6 - https://doi.org/10.1007/s00253-023-12553-w
SN - 1432-0614
N1 - Corresponding author: Petra Siegert
VL - 107
SP - 3939
EP - 3954
PB - Springer Nature
CY - Berlin
ER -
TY - JOUR
A1 - Falkenberg, Fabian
A1 - Rahba, Jade
A1 - Fischer, David
A1 - Bott, Michael
A1 - Bongaerts, Johannes
A1 - Siegert, Petra
T1 - Biochemical characterization of a novel oxidatively stable, halotolerant, and high-alkaline subtilisin from Alkalihalobacillus okhensis Kh10-101T
JF - FEBS Open Bio
N2 - Halophilic and halotolerant microorganisms represent a promising source of salt-tolerant enzymes suitable for various biotechnological applications where high salt concentrations would otherwise limit enzymatic activity. Considering the current growing enzyme market and the need for more efficient and new biocatalysts, the present study aimed at the characterization of a high-alkaline subtilisin from Alkalihalobacillus okhensis Kh10-101T. The protease gene was cloned and expressed in Bacillus subtilis DB104. The recombinant protease SPAO with 269 amino acids belongs to the subfamily of high-alkaline subtilisins. The biochemical characteristics of purified SPAO were analyzed in comparison with subtilisin Carlsberg, Savinase, and BPN'. SPAO, a monomer with a molecular mass of 27.1 kDa, was active over a wide range of pH 6.0–12.0 and temperature 20–80 °C, optimally at pH 9.0–9.5 and 55 °C. The protease is highly oxidatively stable to hydrogen peroxide and retained 58% of residual activity when incubated at 10 °C with 5% (v/v) H2O2 for 1 h while stimulated at 1% (v/v) H2O2. Furthermore, SPAO was very stable and active at NaCl concentrations up to 5.0 m. This study demonstrates the potential of SPAO for biotechnological applications in the future.
KW - Alkalihalobacillus okhensis
KW - detergent protease
KW - halotolerant protease
KW - high-alkaline subtilisin
KW - oxidative stable protease
Y1 - 2022
U6 - https://doi.org/10.1002/2211-5463.13457
SN - 2211-5463
N1 - Corresponding author: Petra Siegert
VL - 12
IS - 10
SP - 1729
EP - 1746
PB - Wiley
CY - Hoboken, NJ
ER -
TY - JOUR
A1 - Falkenberg, Fabian
A1 - Kohn, Sophie
A1 - Bott, Michael
A1 - Bongaerts, Johannes
A1 - Siegert, Petra
T1 - Biochemical characterisation of a novel broad pH spectrum subtilisin from Fictibacillus arsenicus DSM 15822ᵀ
JF - FEBS Open Bio
N2 - Subtilisins from microbial sources, especially from the Bacillaceae family, are of particular interest for biotechnological applications and serve the currently growing enzyme market as efficient and novel biocatalysts. Biotechnological applications include use in detergents, cosmetics, leather processing, wastewater treatment and pharmaceuticals. To identify a possible candidate for the enzyme market, here we cloned the gene of the subtilisin SPFA from Fictibacillus arsenicus DSM 15822ᵀ (obtained through a data mining-based search) and expressed it in Bacillus subtilis DB104. After production and purification, the protease showed a molecular mass of 27.57 kDa and a pI of 5.8. SPFA displayed hydrolytic activity at a temperature optimum of 80 °C and a very broad pH optimum between 8.5 and 11.5, with high activity up to pH 12.5. SPFA displayed no NaCl dependence but a high NaCl tolerance, with decreasing activity up to concentrations of 5 m NaCl. The stability enhanced with increasing NaCl concentration. Based on its substrate preference for 10 synthetic peptide 4-nitroanilide substrates with three or four amino acids and its phylogenetic classification, SPFA can be assigned to the subgroup of true subtilisins. Moreover, SPFA exhibited high tolerance to 5% (w/v) SDS and 5% H₂O₂ (v/v). The biochemical properties of SPFA, especially its tolerance of remarkably high pH, SDS and H₂O₂, suggest it has potential for biotechnological applications.
KW - Bacillaceae
KW - Biotechnological application
KW - Broad pH spectrum
KW - Subtilases
KW - Subtilisin
Y1 - 2023
U6 - https://doi.org/10.1002/2211-5463.13701
SN - 2211-5463
N1 - Corresponding author: Petra Siegert
VL - 13
IS - 11
SP - 2035
EP - 2046
PB - Wiley
CY - Hoboken, NJ
ER -
TY - JOUR
A1 - Falkenberg, Fabian
A1 - Bott, Michael
A1 - Bongaerts, Johannes
A1 - Siegert, Petra
T1 - Phylogenetic survey of the subtilase family and a data-mining-based search for new subtilisins from Bacillaceae
JF - Frontiers in Microbiology
N2 - The subtilase family (S8), a member of the clan SB of serine proteases are ubiquitous in all kingdoms of life and fulfil different physiological functions. Subtilases are divided in several groups and especially subtilisins are of interest as they are used in various industrial sectors. Therefore, we searched for new subtilisin sequences of the family Bacillaceae using a data mining approach. The obtained 1,400 sequences were phylogenetically classified in the context of the subtilase family. This required an updated comprehensive overview of the different groups within this family. To fill this gap, we conducted a phylogenetic survey of the S8 family with characterised holotypes derived from the MEROPS database. The analysis revealed the presence of eight previously uncharacterised groups and 13 subgroups within the S8 family. The sequences that emerged from the data mining with the set filter parameters were mainly assigned to the subtilisin subgroups of true subtilisins, high-alkaline subtilisins, and phylogenetically intermediate subtilisins and represent an excellent source for new subtilisin candidates.
Y1 - 2022
U6 - https://doi.org/10.3389/fmicb.2022.1017978
SN - 1664-302X
VL - 2022
IS - 13
PB - Frontiers
CY - Lausanne
ER -
TY - JOUR
A1 - Everaers, Ralf
A1 - Karimi-Varzaneh, Hossein Ali
A1 - Fleck, Franz
A1 - Hojdis, Nils
A1 - Svaneborg, Carsten
T1 - Kremer–Grest Models for Commodity Polymer Melts: Linking Theory, Experiment, and Simulation at the Kuhn Scale
JF - Macromolecules
N2 - The Kremer–Grest (KG) polymer model is a standard model for studying generic polymer properties in molecular dynamics simulations. It owes its popularity to its simplicity and computational efficiency, rather than its ability to represent specific polymers species and conditions. Here we show that by tuning the chain stiffness it is possible to adapt the KG model to model melts of real polymers. In particular, we provide mapping relations from KG to SI units for a wide range of commodity polymers. The connection between the experimental and the KG melts is made at the Kuhn scale, i.e., at the crossover from the chemistry-specific small scale to the universal large scale behavior. We expect Kuhn scale-mapped KG models to faithfully represent universal properties dominated by the large scale conformational statistics and dynamics of flexible polymers. In particular, we observe very good agreement between entanglement moduli of our KG models and the experimental moduli of the target polymers.
Y1 - 2020
U6 - https://doi.org/10.1021/acs.macromol.9b02428
SN - 1520-5835
VL - 53
IS - 6
SP - 1901
EP - 1916
PB - ACS Publications
CY - Washington, DC
ER -
TY - CHAP
A1 - Engel, Mareike
A1 - Thieringer, Julia
A1 - Tippkötter, Nils
T1 - Linking bioprocess engineering and electrochemistry for sustainable biofuel production
T2 - Young Researchers Symposium, YRS 2016. Proceedings
N2 - Electromicrobial engineering is an emerging, highly interdisciplinary research area linking bioprocesses with electrochemistry. In this work, microbial electrosynthesis (MES) of biobutanol is carried out during acetone-butanol-ethanol (ABE) fermentations with Clostridium acetobutylicum. A constant electric potential of −600mV (vs. Ag/AgCl) with simultaneous addition of the soluble redox mediator neutral red is used in order to study the electron transfer between the working electrode and the bacterial cells. The results show an earlier initiation of solvent production for all fermentations with applied potential compared to the conventional ABE fermentation. The f inal butanol concentration can be more than doubled by the application of a negative potential combined with addition of neutral red. Moreover a higher biofilm formation on the working electrode compared to control cultivations has been observed. In contrast to previous studies, our results also indicate that direct electron transfer (DET) might be possible with C. acetobutylicum. The presented results make microbial butanol production economically attractive and therefore support the development of sustainable production processes in the chemical industry aspired by the “Centre for resource-efficient chemistry and raw material change” as well as the the project “NanoKat” working on nanostructured catalysts in Kaiserslautern.
Y1 - 2016
N1 - Young Researchers Symposium, YRS 2016, 14th - 15th April 2016, Fraunhofer-Zentrum Kaiserslautern
SP - 49
EP - 53
PB - Fraunhofer Verlag
CY - Karlsruhe
ER -
TY - JOUR
A1 - Engel, Mareike
A1 - Holtmann, Dirk
A1 - Ulber, Roland
A1 - Tippkötter, Nils
T1 - Increased Biobutanol Production by Mediator‐Less Electro‐Fermentation
JF - Biotechnology Journal
N2 - A future bio-economy should not only be based on renewable raw materials but also in the raise of carbon yields of existing production routes. Microbial electrochemical technologies are gaining increased attention for this purpose. In this study, the electro-fermentative production of biobutanol with C. acetobutylicum without the use of exogenous mediators is investigated regarding the medium composition and the reactor design. It is shown that the use of an optimized synthetic culture medium allows higher product concentrations, increased biofilm formation, and higher conductivities compared to a synthetic medium supplemented with yeast extract. Moreover, the optimization of the reactor system results in a doubling of the maximum product concentrations for fermentation products. When a working electrode is polarized at −600 mV vs. Ag/AgCl, a shift from butyrate to acetone and butanol production is induced. This leads to an increased final solvent yield of Yᴀᴃᴇ = 0.202 gg⁻¹ (control 0.103 gg⁻¹), which is also reflected in a higher carbon efficiency of 37.6% compared to 23.3% (control) as well as a fourfold decrease in simplified E-factor to 0.43. The results are promising for further development of biobutanol production in bioelectrochemical systems in order to fulfil the principles of Green Chemistry.
Y1 - 2018
U6 - https://doi.org/10.1002/biot.201800514
SN - 1860-7314
VL - 14
IS - 4
PB - Wiley-VCH
CY - Weinheim
ER -
TY - JOUR
A1 - Engel, Mareike
A1 - Gemünde, Andre
A1 - Holtmann, Dirk
A1 - Müller-Renno, Christine
A1 - Ziegler, Christiane
A1 - Tippkötter, Nils
A1 - Ulber, Roland
T1 - Clostridium acetobutylicum’s connecting world: cell appendage formation in bioelectrochemical systems
JF - ChemElectroChem
N2 - Bacterial cell appendix formation supports cell-cell interaction, cell adhesion and cell movement. Additionally, in bioelectrochemical systems (BES), cell appendages have been shown to participate in extracellular electron transfer. In this work, the cell appendix formation of Clostridium acetobutylicum in biofilms of a BES are imaged and compared with conventional biofilms. Under all observed conditions, the cells possess filamentous appendages with a higher number and density in the BES. Differences in the amount of extracellular polymeric substance in the biofilms of the electrodes lead to the conclusion that the cathode can be used as electron donor and the anode as electron acceptor by C. acetobutylicum. When using conductive atomic force microscopy, a current response of about 15 nA is found for the cell appendages from the BES. This is the first report of conductivity for clostridial cell appendices and represents the basis for further studies on their role for biofilm formation and electron transfer.
Y1 - 2019
U6 - https://doi.org/10.1002/celc.201901656
SN - 2196-0216
VL - 7
IS - 2
SP - 414
EP - 420
PB - Wiley
CY - Weinheim
ER -
TY - JOUR
A1 - Engel, Mareike
A1 - Bayer, Hendrik
A1 - Holtmann, Dirk
A1 - Tippkötter, Nils
A1 - Ulber, Roland
T1 - Flavin secretion of Clostridium acetobutylicum in a bioelectrochemical system - Is an iron limitation involved?
JF - Bioelectrochemistry
Y1 - 2019
U6 - https://doi.org/10.1016/j.bioelechem.2019.05.014
SN - 1567-5394
IS - In Press, Accepted Manuscript
PB - Elsevier
CY - Amsterdam
ER -
TY - GEN
A1 - Engel, M.
A1 - Tippkötter, Nils
T1 - Einfluss eines Phenazin-Mediators und elektrischen Potenzials auf die Aceton-Butanol-Ethanol-Fermentation
T2 - Chemie Ingenieur Technik
N2 - In den letzten Jahren haben nachhaltige, biotechnologische Prozesse zunehmend an Bedeutung gewonnen. Die Aceton-Butanol-Ethanol-Fermentation (ABE-Fermentation) mit dem anaeroben Bakterium Clostridium acetobutylicum zur Gewinnung von Biobutanol könnte in diesem Zusammenhang eine Möglichkeit der nachhaltigen Kraftstoffproduktion darstellen. In dieser Arbeit wird der Einfluss zusätzlich verfügbarer Elektronen durch den Einsatz des Phenazin-Farbstoffs Neutralrot als Redoxmediator sowie das Anlegen eines elektrischen Potenzials während der ABE-Fermentation untersucht. Es wird gezeigt, dass das Neutralrot keinen Einfluss auf die Leerlaufspannung von ca. 500 mV vs. Ag/AgCl während der Fermentation hat. Der Mediator bewirkt allerdings eine frühere Butanolbildung sowie höhere Butanolkonzentrationen. Wird zudem die Mediatorkonzentration von 125 mM auf 250 mM angehoben, wird dabei auch die maximale Butanolkonzentration um 36 % ± 1,8 % innerhalb von28 Stunden gesteigert.
Y1 - 2016
U6 - https://doi.org/10.1002/cite.201650105
SN - 0009-286X
SN - 1522-2640 (eISSN)
N1 - ProcessNet-Jahrestagung 2016 und 32. DECHEMA-Jahrestagung der Biotechnologen 2016, 12. - 15. September 2016, Eurogress Aachen
VL - 88
IS - 9
SP - 1254
PB - Wiley-VCH
CY - Weinheim
ER -
TY - CHAP
A1 - Engel, M.
A1 - Thieringer, J.
A1 - Tippkötter, Nils
T1 - Microbial electrosynthesis for sustainable biobutanol production
T2 - New frontiers of biotech-processes (Himmelfahrtstagung) : 02-04 May 2016, Rhein-Mosel-Halle, Koblenz/Germany
Y1 - 2016
SP - 77
EP - 78
PB - DECHEMA
CY - Frankfurt am Main
ER -
TY - GEN
A1 - Engel, M.
A1 - Bayer, H.
A1 - Ulber, Roland
A1 - Tippkötter, Nils
T1 - Kommt es in Elektrofermentationen mit Clostridium acetobutylicum zu einer Eisenlimitierung?
T2 - Chemie Ingenieur Technik
N2 - Das strikt anaerobe Bakterium Clostridium acetobutylicum bildet die Lösemittel Aceton, Butanol und Ethanol (ABE-Fermentation). Im Fall einer Eisenlimitierung kommt es zusätzlich zu einer Riboflavinsekretion (RF), was durch die gelbe Färbung des Kulturüberstands erkennbar ist. In dieser Arbeit wurde beobachtet, dass während Elektrofermentationen mit C. acetobutylicum bei –600 mV eine gelbe Färbung auftritt. Es wurde deshalb untersucht, ob eine Eisenlimitierung im bio-elektrochemischen System (BES) vorliegt. Hierzu wurden die Flavinspezien bei Kultivierungen in Medien mit einer Eisenlimitierung bzw. mit ausreichend Eisen in Serumflaschen sowie im BES mit und ohne angelegtem Potenzial verglichen. In den Serumflaschenversuchen wurden RF und Flavinadenindinukleotid (FAD)-Konzentrationen von ‡ 20 mg L⁻¹ sowie Flavinmononukleotid (FMN)-Konzentrationen von ca. 5 mg L⁻¹ detektiert. Bei ausreichender Eisenverfügbarkeit hingegen wurden in den Serumflaschen fast keine Flavine sekretiert. Im BES bei –600 mV hingegen wurde auch in diesen Kulturüberständen FMN und FAD (1–5 mg L⁻¹ ),jedoch kein RF gemessen. Diese Ergebnisse zeigen, dass die Flavinbildung im BES mit angelegtem Potenzial nicht mit der Flavinbildung unter Eisenlimitierung in Serumflaschen korreliert. Andere Faktoren für eine mögliche Flavinbildung werden aktuell näher betrachtet.
Y1 - 2018
U6 - https://doi.org/10.1002/cite.201855047
SN - 0009-286X
SN - 1522-2640 (eISSN)
N1 - ProcessNet-Jahrestagung und 33. DECHEMA-Jahrestagung der Biotechnologen 2018, 10. - 13. September 2018, Eurogress Aachen
VL - 90
IS - 9
SP - 1154
PB - Wiley-VCH
CY - Weinheim
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Zang, Thorsten
A1 - Buck, Manfred
T1 - Ruß-Immissionsmessungen im Einflußbereich des Kraftfahrzeugverkehrs
JF - Staub, Reinhaltung der Luft : air quality control. 50 (1990)
Y1 - 1990
SN - 0039-0771
SP - 93
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Thomzik, Manfred
T1 - Das Entstehen geruchsintensiver schwefelhaltiger organischer Verbindungen in Lackierereien und Möglichkeiten zu deren Vermeidung
JF - Aus der Tätigkeit der LIS / Landesanstalt für Immissionsschutz des Landes Nordrhein-Westfalen. 1989 (1990)
Y1 - 1990
SN - 0931-5497
SP - 35
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Richter, J.
T1 - Messung kraftfahrzeugbedingter Rußimmissionen
JF - Staub, Reinhaltung der Luft : air quality control. 54 (1994)
Y1 - 1994
SN - 0039-0771
SP - 19
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Remme, S.
A1 - Lehmann, G.
T1 - EPR of Cr3+ in Tris(acetylacetonato)gallium(III) Single Crystals
JF - Inorganic Chemistry. 25 (1986)
Y1 - 1986
SN - 0020-1669
SP - 896
EP - 897
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Remme, S.
A1 - Lehmann, G.
T1 - EPR and Optical Absorption of Cr3+ in CsCl and CsBr
JF - Physica Status Solidi (B). 142 (1987), H. 2
Y1 - 1987
SN - 0031-8957
SP - 367
EP - 377
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Pfeffer, Hans-Ulrich
A1 - Friesel, Jürgen
A1 - Beier, Reinhold
T1 - Air Pollution Monitoring in Street Canyons / Hans-Ulrich Pfeffer, Jürgen Friesel, Gereon Elbers, Reinhold Beier,
JF - Transport and air pollution : proceedings ; 3rd international symposium, Palais des Papes, Avignon, France, 6 - 10 June 1994 = Transports et pollution de l'air / [Third International Symposium on Transport and Air Pollution]. Ed. by Robert Joumard. Organizer: French National Institute for Transport and Safety Research
Y1 - 1995
N1 - International Symposium on Transport and Air Pollution <3, 1994, Avignon>
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Pfeffer, H.-U.
A1 - Friesel, J.
A1 - Beier, R.
T1 - Pilotuntersuchungen gemäß dem Verordnungsentwurf nach § 40, Abs. 2 des Bundesimmissionsschutzgesetzes / H.-U. Pfeffer, J. Friesel, G. Elbers, R. Beier, K. Ellermann
JF - Drei Jahrzehnte Luftqualitätsüberwachung : Vorträge und Berichte zum Kolloquium "Drei Jahrzehnte Luftqualitätsüberwachung - Bilanz und Perspektiven" am 11. November 1993 in Essen / [Hrsg.: Landesanstalt für Immissionsschutz Nordrhein-Westfalen. Red. Bearb.: Robert Niesenhaus]
Y1 - 1993
N1 - LIS-Berichte ; 110 ;
SP - 117
CY - Essen
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Nieren, Monika
A1 - Hoffmann, Katharina
A1 - Gäb, Martina
T1 - Schnellerfassung der Wirkung von Luftschadstoffen auf Pflanzen mit der Nahinfrarotspektroskopie (NIRS). Untersuchung Ammoniak exponierter Gräser und Kräuter / Nieren, Monika ; Hoffmann, Katharina ; Gäb, Martina ; Ooyen, Sven van ; Köllner, Barbara ; Elbe
JF - Immissionsschutz. 13 (2008), H. 2
Y1 - 2008
SN - 1430-9262
SP - 82
EP - 90
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Muratyan, Simone
T1 - Problematik verkehrsbezogener Außenluftmessungen von Partikeln (Dieselruß)
JF - + Krebserzeugende Stoffe in der Umwelt : Herkunft, Messung, Risiko, Minimierung ; Kolloquium Mannheim, 23. bis 25. April 1991 / Kommission Reinhaltung der Luft im VDI und DIN
Y1 - 1991
SN - 3-18-090888-2
N1 - VDI-Berichte ; 888
SP - 143
PB - VDI-Verl.
CY - Düsseldorf
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Lehmann, G.
T1 - Electron paramagnetic resonance of Vanadyl ion impurities in crystalline solids: A comment
JF - Journal of Physics and Chemistry of Solids. 46 (1985), H. 6
Y1 - 1985
SN - 0022-3697
SP - 761
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Lehmann, G.
T1 - Electron Paramagnetic Resonance and Optical Absorption Spectra of VO2+ in CsCl Single Crystals
JF - Zeitschrift für Naturforschung / Section A, a journal of physical sciences. 40 (1985)
Y1 - 1985
SN - 0932-0784
SP - 511
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Gäb, Martina
A1 - Hoffmann, Katharina
A1 - Lobe, Melanie
T1 - NIR-spectroscopic investigation of foliage of ozone-stressed Fagus sylvatica trees / Gäb, Martina ; Hoffmann, Katharina ; Lobe, Melanie ; Metzger, Rut ; Ooyen, Sven van ; Elbers, Gereon ; Köllner, Barbara
JF - Journal of Forest Research. 11 (2006), H. 2
Y1 - 2006
SN - 1341-6979
SP - 69
EP - 75
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Buck, Manfred
T1 - Soot Concentration in Ambient Air / M. Buck, G. Elbers
JF - Erdöl & Kohle, Erdgas, Petrochemie : EKEP. 45 (1992)
Y1 - 1992
SN - 0014-0058
SP - 219
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Behner, T.
A1 - Remme, S.
A1 - Prissok, F.
T1 - Interstitial Metal Impurities as a Possible Cause of Enhanced Reactivities / T. Behner, G. Elbers, S. Remme, F. Prissok, P. Stegger, and G. Lehmann
JF - Berichte der Bunsen-Gesellschaft : physical chemistry, chemical physics. 90 (1986)
Y1 - 1986
SN - 0005-9021
SP - 698
ER -
TY - JOUR
A1 - Elbers, Gereon
A1 - Bauer, H. D.
A1 - Buck, Manfred
A1 - Dahmann, D.
T1 - Rußmessungen am Arbeitsplatz und in der Außenluft - Vergleich zweier Meßmethoden / H.D. Bauer, M. Buck, D. Dahmann, G. Elbers, H.-H. Fricke
JF - Staub, Reinhaltung der Luft : air quality control. 54 (1994)
Y1 - 1994
SN - 0039-0771
SP - 55
ER -
TY - JOUR
A1 - Elbers, Gereon
T1 - Identification of marker peptides in hair for discrimination with regard to species and breed / Koerner, Andrea ; Ring, Maike ; Fabry, Marlies ; Elbers, Gereon ; Moeller, Martin
JF - Proceedings of the Aachen-Dresden International Textile Conference, 3rd, Aachen, Germany, Nov. 26-27, 2009
Y1 - 2009
N1 - Aachen-Dresden International Textile Conference ; (3 : ; 2009.11.26-27 : ; Aachen)
PB - DWI
CY - Aachen
ER -
TY - JOUR
A1 - Elbers, Gereon
T1 - Messung von Ruß in der Außenluft - Praktische Erfahrungen und Meßergebnisse aus NRW
JF - Aktuelle Aufgaben der Messtechnik in der Luftreinhaltung : Kolloquium Heidelberg, 2. bis 4. Juni 1993 / Kommission Reinhaltung der Luft im VDI und DIN
Y1 - 1993
SN - 3-18-091059-3
N1 - VDI-Berichte ; 1059
SP - 337
PB - VDI-Verl.
CY - Düsseldorf
ER -
TY - BOOK
A1 - Elbers, Gereon
T1 - Entwicklung eines Schnellmessverfahrens zur Charakterisierung der Wirkung von Umweltschadstoffen auf Pflanzen mit der Nahinfrarot-Spektroskopie : Schlussbericht zum Forschungsvorhaben ; Vorhabensbezeichnung: Schnellmessverfahren zur Charakterisierung der Wirkung von Umweltschadstoffen ; Laufzeit des Vorhabens: 01.09.2002 bis 29.02.2004 ; Verlängerung der Laufzeit: 01.03.2004 bis 30.04.04 ; Berichtszeitraum: 01.09.2002 bis 30.04.2004 / Zuwendungsempfänger: FH-Aachen, Abt. Jülich, FB Chemie und Biotechnik. Gereon Elbers
Y1 - 2004
N1 - Förderkennzeichen BMBF 1704502 ; weitere elektr. Ausgabe der TIB Hannover : http://edok01.tib.uni-hannover.de/edoks/e01fb05/485188317.pdf
PB - Fachhochschule Aachen
CY - Jülich
ER -
TY - JOUR
A1 - El Moussaoui, Noureddine
A1 - Talbi, Sofian
A1 - Atmane, Ilyas
A1 - Kassmi, Khalil
A1 - Schwarzer, Klemens
A1 - Chayeb, Hamid
A1 - Bachiri, Najib
T1 - Feasibility of a new design of a Parabolic Trough Solar Thermal Cooker (PSTC)
JF - Solar Energy
N2 - In this article, we describe the structure, the functioning, and the tests of parabolic trough solar thermal cooker (PSTC). This oven is designed to meet the needs of rural residents, including Urban, which requires stable cooking temperatures above 200 °C. The cooking by this cooker is based on the concentration of the sun's rays on a glass vacuum tube and heating of the oil circulate in a big tube, located inside the glass tube. Through two small tubes, associated with large tube, the heated oil, rise and heats the pot of cooking pot containing the food to be cooked (capacity of 5 kg). This cooker is designed in Germany and extensively tested in Morocco for use by the inhabitants who use wood from forests.
During a sunny day, having a maximum solar radiation around 720 W/m2 and temperature ambient around 26 °C, maximum temperatures recorded of the small tube, the large tube and the center of the pot are respectively: 370 °C, 270 °C and 260 °C. The cooking process with food at high (fries, ..), we show that the cooking oil temperature rises to 200 °C, after 1 h of heating, the cooking is done at a temperature of 120 °C for 20 min. These temperatures are practically stable following variations and decreases in the intensity of irradiance during the day. The comparison of these results with those of the literature shows an improvement of 30–50 % on the maximum value of the temperature with a heat storage that could reach 60 min of autonomy. All the results obtained show the good functioning of the PSTC and the feasibility of cooking food at high temperature (>200 °C).
Y1 - 2020
U6 - https://doi.org/10.1016/j.solener.2020.03.079
SN - 0038-092X
VL - 201
IS - Vol. 201 (May 2020)
SP - 866
EP - 871
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - El Bergui, Omnia
A1 - Abouabdillah, Aziz
A1 - Bourioug, Mohamed
A1 - Schmitz, Dominik
A1 - Biel, Markus
A1 - Aboudrare, Abdellah
A1 - Krauss, Manuel
A1 - Jomaa, Ahlem
A1 - Romuli, Sebastian
A1 - Müller, Joachim
A1 - Fagroud, Mustapha
A1 - Bouabid, Rachid
T1 - Innovative solutions for drought: Evaluating hydrogel application on onion cultivation (Allium cepa) in Morocco
JF - Water
N2 - Throughout the last decade, and particularly in 2022, water scarcity has become a critical concern in Morocco and other Mediterranean countries. The lack of rainfall during spring was worsened by a succession of heat waves during the summer. To address this drought, innovative solutions, including the use of new technologies such as hydrogels, will be essential to transform agriculture. This paper presents the findings of a study that evaluated the impact of hydrogel application on onion (Allium cepa) cultivation in Meknes, Morocco. The treatments investigated in this study comprised two different types of hydrogel-based soil additives (Arbovit® polyacrylate and Huminsorb® polyacrylate), applied at two rates (30 and 20 kg/ha), and irrigated at two levels of water supply (100% and 50% of daily crop evapotranspiration; ETc). Two control treatments were included, without hydrogel application and with both water amounts. The experiment was conducted in an open field using a completely randomized design. The results indicated a significant impact of both hydrogel-type dose and water dose on onion plant growth, as evidenced by various vegetation parameters. Among the hydrogels tested, Huminsorb® Polyacrylate produced the most favorable outcomes, with treatment T9 (100%, HP, 30 kg/ha) yielding 70.55 t/ha; this represented an increase of 11 t/ha as compared to the 100% ETc treatment without hydrogel application. Moreover, the combination of hydrogel application with 50% ETc water stress showed promising results, with treatment T4 (HP, 30 kg, 50%) producing almost the same yield as the 100% ETc treatment without hydrogel while saving 208 mm of water.
KW - water economy
KW - yield
KW - deficit irrigation
KW - hydrogel
KW - onion
Y1 - 2023
U6 - https://doi.org/10.3390/w15111972
VL - 15
IS - 11
PB - MDPI
CY - Basel
ER -
TY - PAT
A1 - Ehmke, Tobias
A1 - Finger, Sebastian
A1 - Hojdis, Nils
A1 - Kurz, Martin
A1 - Nawrocka-Herczynska, Monika
T1 - Funkeinheit und Vorrichtung mit einer Funkeinheit
N2 - Dargestellt und beansprucht ist eine Funkeinheit mit einem Funkbauteil, einer elektrisch leitfähigen Antenne und einem Kunststoffverbindungsmittel. Das Funkbauteil weist einen Antennenanschluss auf. Das Kunststoffverbindungsmittel weist ein erstes Elastomermaterial mit elektrisch leitfähigem Zusatzmaterial auf, so dass das Kunststoffverbindungsmittel elektrisch leitfähig ist. Das Kunststoffverbindungsmittel bildet eine mechanische und elektrisch leitfähige Verbindung zwischen dem Antennenanschluss und der Antenne. Weiterhin wird eine Vorrichtung mit einem ein Matrixmaterial mit oder aus einem zweiten Elastomermaterial und einer Funkeinheit beschrieben und beansprucht, wobei die Funkeinheit vollständig in das Matrixmaterial eingebettet ist. Die Vorrichtung kann insbesondere ein Fahrzeugreifen sein.
Y1 - 2020
N1 - Patent DE102018222380A1 25.06.2020
ER -