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 - 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 - 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 - 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 - 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 - 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 - JOUR
A1 - Eckert, Alexander
A1 - Rudolph, Tobias
A1 - Guo, Jiaqi
A1 - Mang, Thomas
A1 - Walther, Andreas
T1 - Exceptionally Ductile and Tough Biomimetic Artificial Nacre with Gas Barrier Function
JF - Advanced Materials
N2 - Synthetic mimics of natural high-performance structural materials have shown great and partly unforeseen opportunities for the design of multifunctional materials. For nacre-mimetic nanocomposites, it has remained extraordinarily challenging to make ductile materials with high stretchability at high fractions of reinforcements, which is however of crucial importance for flexible barrier materials. Here, highly ductile and tough nacre-mimetic nanocomposites are presented, by implementing weak, but many hydrogen bonds in a ternary nacre-mimetic system consisting of two polymers (poly(vinyl amine) and poly(vinyl alcohol)) and natural nanoclay (montmorillonite) to provide efficient energy dissipation and slippage at high nanoclay content (50 wt%). Tailored interactions enable exceptional combinations of ductility (close to 50% strain) and toughness (up to 27.5 MJ m⁻³). Extensive stress whitening, a clear sign of high internal dynamics at high internal cohesion, can be observed during mechanical deformation, and the materials can be folded like paper into origami planes without fracture. Overall, the new levels of ductility and toughness are unprecedented in highly reinforced bioinspired nanocomposites and are of critical importance to future applications, e.g., as barrier materials needed for encapsulation and as a printing substrate for flexible organic electronics.
Y1 - 2018
U6 - https://doi.org/10.1002/adma.201802477
VL - 30
IS - 32
SP - Article number 1802477
PB - Wiley-VCH
ER -
TY - JOUR
A1 - Eckert, Alexander
A1 - Abbasi, Mozhdeh
A1 - Mang, Thomas
A1 - Saalwächter, Kay
A1 - Walther, Andreas
T1 - Structure, Mechanical Properties, and Dynamics of Polyethylenoxide/Nanoclay Nacre-Mimetic Nanocomposites
JF - Macromolecules
N2 - Nacre-mimetic nanocomposites based on high fractions of synthetic high-aspect-ratio nanoclays in combination with polymers are continuously pushing boundaries for advanced material properties, such as high barrier against oxygen, extraordinary mechanical behavior, fire shielding, and glass-like transparency. Additionally, they provide interesting model systems to study polymers under nanoconfinement due to the well-defined layered nanocomposite arrangement. Although the general behavior in terms of forming such layered nanocomposite materials using evaporative self-assembly and controlling the nanoclay gallery spacing by the nanoclay/polymer ratio is understood, some combinations of polymer matrices and nanoclay reinforcement do not comply with the established models. Here, we demonstrate a thorough characterization and analysis of such an unusual polymer/nanoclay pair that falls outside of the general behavior. Poly(ethylene oxide) (PEO) and sodium fluorohectorite form nacre-mimetic, lamellar nanocomposites that are completely transparent and show high mechanical stiffness and high gas barrier, but there is only limited expansion of the nanoclay gallery spacing when adding increasing amounts of polymer. This behavior is maintained for molecular weights of PEO varied over four orders of magnitude and can be traced back to depletion forces. By careful investigation via X-ray diffraction and proton low-resolution solid-state NMR, we are able to quantify the amount of mobile and immobilized polymer species in between the nanoclay galleries and around proposed tactoid stacks embedded in a PEO matrix. We further elucidate the unusual confined polymer dynamics, indicating a relevant role of specific surface interactions.
Y1 - 2020
U6 - https://doi.org/10.1021/acs.macromol.9b01931
SN - 1520-5835
VL - 53
IS - 5
SP - 1716
EP - 1725
PB - ACS Publications
CY - Washington, DC
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 - Dünnwald, Thomas
A1 - Demir, Ayhan S.
A1 - Siegert, Petra
A1 - Pohl, Martina
A1 - Müller, Michael
T1 - Enantioselective Synthesis of (S)-2-Hydroxypropanone Derivatives by Benzoylformate Decarboxylase Catalyzed C−C Bond Formation
JF - European journal of organic chemistry
Y1 - 2000
SN - 0365-5490 (E-Journal); 1099-0690 (E-Journal); 0075-4617 (Print); 0170-2041 (Print); 0947-3440 (Print); 1434-193X (Print); 1434-243X (Print)
VL - Vol. 2000
IS - Iss. 11
SP - 2161
EP - 2170
ER -
TY - JOUR
A1 - Dünkelmann, Pascal
A1 - Kolter-Jung, Doris
A1 - Nitsche, Adam
A1 - Demir, Ayhan S.
A1 - Siegert, Petra
A1 - Lingen, Bettina
A1 - Baumann, Martin
A1 - Pohl, Martina
A1 - Müller, Michael
T1 - Development of a donor-acceptor concept for enzymatic cross-coupling reactions of adehydes : the first asymmetric cross-benzoin condensation
JF - Journal of the American Chemical Society
Y1 - 2002
SN - 1520-5126 (E-Journal); 0002-7863 (Print)
VL - Vol. 124
SP - 12084
EP - 12085
ER -
TY - JOUR
A1 - Dutta, Suryendu
A1 - Hartkopf-Fröder, Christoph
A1 - Witte, Karin
A1 - Brocke, Rainer
A1 - Mann, Ulrich
T1 - Molecular characterization of fossil palynomorphs by transmission micro-FTIR spectroscopy: implications for hydrocarbon source evaluation
JF - International journal of coal geology
Y1 - 2013
SN - 1872-7840 (E-Journal); 0166-5162 (Print)
VL - Vol. 115
SP - 13
EP - 23
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Druckenmüller, Katharina
A1 - Günther, Klaus
A1 - Elbers, Gereon
T1 - Near-infrared spectroscopy (NIRS) as a tool to monitor exhaust air from poultry operations
JF - Science of the Total Environment
N2 - Intensive poultry operation systems emit a considerable volume of inorganic and organic matter in the surrounding environment. Monitoring cleaning properties of exhaust air cleaning systems and to detect small but significant changes in emission characteristics during a fattening cycle is important for both emission and fattening process control. In the present study, we evaluated the potential of near-infrared spectroscopy (NIRS) combined with chemometric techniques as a monitoring tool of exhaust air from poultry operation systems. To generate a high-quality data set for evaluation, the exhaust air of two poultry houses was sampled by applying state-of-the-art filter sampling protocols. The two stables were identical except for one crucial difference, the presence or absence of an exhaust air cleaning system. In total, twenty-one exhaust air samples were collected at the two sites to monitor spectral differences caused by the cleaning device, and to follow changes in exhaust air characteristics during a fattening period. The total dust load was analyzed by gravimetric determination and included as a response variable in multivariate data analysis. The filter samples were directly measured with NIR spectroscopy. Principal component analysis (PCA), linear discriminant analysis (LDA), and factor analysis (FA) were effective in classifying the NIR exhaust air spectra according to fattening day and origin. The results indicate that the dust load and the composition of exhaust air (inorganic or organic matter) substantially influence the NIR spectral patterns. In conclusion, NIR spectroscopy as a tool is a promising and very rapid way to detect differences between exhaust air samples based on still not clearly defined circumstances triggered during a fattening period and the availability of an exhaust air cleaning system.
Y1 - 2018
U6 - https://doi.org/10.1016/j.scitotenv.2018.02.072
SN - 0048-9697
VL - 630
SP - 536
EP - 543
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Deppe, Veronika Maria
A1 - Klatte, Stephanie
A1 - Bongaerts, Johannes
A1 - Maurer, Karl-Heinz
A1 - O'Connell, Timothy
A1 - Meinhardt, Friedhelm
T1 - Genetic control of Amadori product degradation in Bacillus subtilis via regulation of frlBONMD expression by FrlR
JF - Applied and environmental microbiology
Y1 - 2011
SN - 1098-5336 (E-Journal); 0003-6919 (Print); 0099-2240 (Print)
VL - Vol. 77
IS - No. 9
SP - 2839
EP - 2846
PB - American Society of Mechanical Engineers (ASME)
CY - New York
ER -
TY - JOUR
A1 - Deppe, Veronika Maria
A1 - Bongaerts, Johannes
A1 - O'Connell, Timothy
A1 - Maurer, Karl-Heinz
A1 - Meinhardt, Friedhelm
T1 - Enzymatic deglycation of Amadori products in bacteria
JF - Applied microbiology and biotechnology
Y1 - 2011
SN - 1432-0614 (E-Journal); 0171-1741 (Print); 0175-7598 (Print); 0340-2118 (Print)
VL - Vol. 90
IS - Iss. 2
SP - 399
EP - 406
PB - Springer
CY - Berlin
ER -
TY - JOUR
A1 - Demmer, Julius K.
A1 - Chowdhury, Nilanjan Pal
A1 - Selmer, Thorsten
A1 - Ermler, Ulrich
A1 - Buckel, Wolfgang
T1 - The semiquinone swing in the bifurcating electron transferring flavoprotein/butyryl-CoA dehydrogenase complex from Clostridium difficile
JF - Nature Communications
Y1 - 2017
U6 - https://doi.org/10.1038/s41467-017-01746-3
SN - 2041-1723
N1 - Article number 1577
VL - 8
IS - 1
SP - 1
EP - 10
ER -
TY - JOUR
A1 - Dellmann, Sophia Florence
A1 - Glorius, J.
A1 - Litvinov, Yu A.
A1 - Reifarth, R.
A1 - Al-Khasawneh, Kafa
A1 - Aliotta, M.
A1 - Bott, L.
A1 - Brückner, Benjamin
A1 - Bruno, C. G.
A1 - Chen, Ruijiu
A1 - Davinson, T.
A1 - Dickel, T.
A1 - Dillmann, Iris
A1 - Dmytriev, D.
A1 - Erbacher, P.
A1 - Freire-Fernández, D.
A1 - Forstner, Oliver
A1 - Geissel, H.
A1 - Göbel, K.
A1 - Griffin, Christopher J.
A1 - Grisenti, R.
A1 - Gumberidze, Alexandre
A1 - Haettner, Emma
A1 - Hagmann, Siegbert
A1 - Heil, M.
A1 - Heß, R.
A1 - Hillenbrand, P.-M.
A1 - Joseph, R.
A1 - Jurado, B.
A1 - Kozhuharov, Christophor
A1 - Kulikov, I.
A1 - Löher, Bastian
A1 - Langer, Christoph
A1 - Leckenby, Guy
A1 - Lederer-Woods, C.
A1 - Lestinsky, M.
A1 - Litvinov, S. A.
A1 - Lorenz, B. A.
A1 - Lorenz, E.
A1 - Marsh, J.
A1 - Menz, Esther Babette
A1 - Morgenroth, T.
A1 - Petridis, N.
A1 - Pibernat, Jerome
A1 - Popp, U.
A1 - Psaltis, Athanasios
A1 - Sanjari, Shahab
A1 - Scheidenberger, C.
A1 - Sguazzin, M.
A1 - Sidhu, Ragandeep Singh
A1 - Spillmann, Uwe
A1 - Steck, M.
A1 - Stöhlker, T.
A1 - Surzhykov, A.
A1 - Swartz, J. A.
A1 - Törnqvist, H.
A1 - Varga, L.
A1 - Vescovi, Diego
A1 - Weick, H.
A1 - Weigand, M.
A1 - Woods, P.
A1 - Xing, Y.
A1 - Yamaguchi, Taiyo
T1 - Proton capture on stored radioactive ¹¹⁸Te ions
JF - EPJ Web of Conferences
N2 - Experimental determination of the cross sections of proton capture on radioactive nuclei is extremely difficult. Therefore, it is of substantial interest for the understanding of the production of the p-nuclei. For the first time, a direct measurement of proton-capture cross sections on stored, radioactive ions became possible in an energy range of interest for nuclear astrophysics. The experiment was performed at the Experimental Storage Ring (ESR) at GSI by making use of a sensitive method to measure (p,γ) and (p,n) reactions in inverse kinematics. These reaction channels are of high relevance for the nucleosyn-thesis processes in supernovae, which are among the most violent explosions in the universe and are not yet well understood. The cross section of the ¹¹⁸Te(p,γ) reaction has been measured at energies of 6 MeV/u and 7 MeV/u. The heavy ions interacted with a hydrogen gas jet target. The radiative recombination process of the fully stripped ¹¹⁸Te ions and electrons from the hydrogen target was used as a luminosity monitor. An overview of the experimental method and preliminary results from the ongoing analysis will be presented.
Y1 - 2023
U6 - https://doi.org/10.1051/epjconf/202327911018
SN - 2100-014X
N1 - Volume 279, 2023. Nuclear Physics in Astrophysics – X (NPA-X 2022).
VL - 279
IS - Article Number: 11018
SP - 1
EP - 5
PB - EDP Sciences
ER -
TY - JOUR
A1 - Delaittre, Guillaume
T1 - Telechelic Poly(2-Oxazoline)s
JF - European Polymer Journal
Y1 - 2019
U6 - https://doi.org/10.1016/j.eurpolymj.2019.109281
SN - 0014-3057
IS - In Press, Journal Pre-proof, 109281
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Degering, Christian
A1 - Eggert, Thorsten
A1 - Puls, Michael
A1 - Bongaerts, Johannes
A1 - Evers, Stefan
A1 - Maurer, Karl-Heinz
A1 - Jaeger, Karl-Erich
T1 - Optimization of protease secretion in Bacillus subtilis and Bacillus licheniformis by screening of homologous and herologous signal peptides
JF - Applied and environmental microbiology
N2 - Bacillus subtilis and Bacillus licheniformis are widely used for the large-scale industrial production of proteins. These strains can efficiently secrete proteins into the culture medium using the general secretion (Sec) pathway. A characteristic feature of all secreted proteins is their N-terminal signal peptides, which are recognized by the secretion machinery. Here, we have studied the production of an industrially important secreted protease, namely, subtilisin BPN′ from Bacillus amyloliquefaciens. One hundred seventy-three signal peptides originating from B. subtilis and 220 signal peptides from the B. licheniformis type strain were fused to this secretion target and expressed in B. subtilis, and the resulting library was analyzed by high-throughput screening for extracellular proteolytic activity. We have identified a number of signal peptides originating from both organisms which produced significantly increased yield of the secreted protease. Interestingly, we observed that levels of extracellular protease were improved not only in B. subtilis, which was used as the screening host, but also in two different B. licheniformis strains. To date, it is impossible to predict which signal peptide will result in better secretion and thus an improved yield of a given extracellular target protein. Our data show that screening a library consisting of homologous and heterologous signal peptides fused to a target protein can identify more-effective signal peptides, resulting in improved protein export not only in the original screening host but also in different production strains.
Y1 - 2010
U6 - https://doi.org/10.1128/AEM.01146-10
SN - 1098-5336 (E-Journal); 0003-6919 (Print); 0099-2240 (Print)
VL - 76
IS - 19
SP - 6370
EP - 6378
PB - American Society for Microbiology
CY - Washington, DC
ER -