@article{LassonczykAlailyHuthetal.1990, author = {Lassonczyk, Beate and Alaily, F. and Huth, A. and Gensior, A.}, title = {Genesis of soils in the arid part of northeast Somalia / F. Alaily, B. Lassonczyk, A.Huth and A. Gensior}, series = {Berliner geowissenschaftliche Abhandlungen / Reihe A, Geologie und Pal{\"a}ontologie / hrsg. von d. Geowissenschaftlichen Instituten der Freien u. d. Technischen Universit{\"a}t Berlin. 120 A (1990)}, journal = {Berliner geowissenschaftliche Abhandlungen / Reihe A, Geologie und Pal{\"a}ontologie / hrsg. von d. Geowissenschaftlichen Instituten der Freien u. d. Technischen Universit{\"a}t Berlin. 120 A (1990)}, isbn = {0172-8784}, pages = {695 -- 711}, year = {1990}, language = {en} } @article{Lassonczyk1990, author = {Lassonczyk, Beate}, title = {Untersuchung einer Chronosequenz in Nord-Somalia zur Kennzeichnung der Landschaftsgeschichte}, series = {14th International Congress of Soil Science : transactions. vol. 5. Kyoto, Japan, August 12 - 18, 1990 = 14{\`e}me Congr{\`e}s International de la Science du Sol = 14. Internationaler Bodenkundlicher Kongreß / International Society of Soil Science}, journal = {14th International Congress of Soil Science : transactions. vol. 5. Kyoto, Japan, August 12 - 18, 1990 = 14{\`e}me Congr{\`e}s International de la Science du Sol = 14. Internationaler Bodenkundlicher Kongreß / International Society of Soil Science}, pages = {370 -- 371}, year = {1990}, language = {de} } @article{Lassonczyk1989, author = {Lassonczyk, Beate}, title = {Fossile Bodenbildung in Nord-Somalia}, series = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 59 (1989), H. 2}, journal = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 59 (1989), H. 2}, isbn = {0343-107x}, pages = {927 -- 930}, year = {1989}, language = {de} } @article{Lassonczyk1991, author = {Lassonczyk, Beate}, title = {Bodenentwicklung auf Terrassenschottern im ariden Bereich von NO-Somalia}, series = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 66 (1991), H. 2}, journal = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 66 (1991), H. 2}, isbn = {0343-107x}, pages = {1153 -- 1156}, year = {1991}, language = {de} } @article{Lassonczyk1990, author = {Lassonczyk, Beate}, title = {Characteristics of a fossil soil developed on the basement complex in the northeast Somalia}, series = {Berliner geowissenschaftliche Abhandlungen / Reihe A, Geologie und Pal{\"a}ontologie / hrsg. von d. Geowissenschaftlichen Instituten der Freien u. d. Technischen Universit{\"a}t Berlin. 120 A (1990)}, journal = {Berliner geowissenschaftliche Abhandlungen / Reihe A, Geologie und Pal{\"a}ontologie / hrsg. von d. Geowissenschaftlichen Instituten der Freien u. d. Technischen Universit{\"a}t Berlin. 120 A (1990)}, isbn = {0172-8784}, pages = {713 -- 718}, year = {1990}, language = {en} } @article{KueppersSteffenHellmuthetal.2014, author = {K{\"u}ppers, Tobias and Steffen, Victoria and Hellmuth, Hendrik and O'Connell, Timothy and Bongaerts, Johannes and Maurer, Karl-Heinz and Wiechert, Wolfgang}, title = {Developing a new production host from a blueprint: Bacillus pumilus as an industrial enzyme producer}, series = {Microbial cell factories}, volume = {13}, journal = {Microbial cell factories}, publisher = {BioMed Central}, address = {London}, issn = {1475-2859 (E-Journal)}, doi = {10.1186/1475-2859-13-46}, pages = {Article No. 46}, year = {2014}, language = {en} } @article{KuschRieserKnuppetal.2015, author = {Kusch, Peter and Rieser, Claudia and Knupp, Gerd and Mang, Thomas}, title = {Characterization of copolymers of methacrylic acid with poly(ethylene glycol) methyl ether methacrylate macromonomers by analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS)}, series = {Journal of Analytical and Applied Pyrolysis}, volume = {Vol. 113}, journal = {Journal of Analytical and Applied Pyrolysis}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0165-2370}, doi = {10.1016/j.jaap.2015.03.003}, pages = {412 -- 418}, year = {2015}, language = {de} } @article{KuropkaMuellerHoeckeretal.1989, author = {Kuropka, Rolf and M{\"u}ller, Bettina and H{\"o}cker, Hartwig and Berndt, Heinz}, title = {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}, series = {Journal of chromatography A}, journal = {Journal of chromatography A}, number = {481}, isbn = {0021-9673}, pages = {380 -- 386}, year = {1989}, language = {en} } @article{KruegerGroetzingerBerndt1987, author = {Kr{\"u}ger, G{\"o}tz and Gr{\"o}tzinger, Joachim and Berndt, Heinz}, title = {Enantiomeric resolution of amino acid derivatives on chiral stationary phases by high-performance liquid chromatography}, series = {Journal of Chromatography A}, volume = {1987}, journal = {Journal of Chromatography A}, number = {397}, issn = {0021-9673}, doi = {10.1016/S0021-9673(01)85005-6}, pages = {223 -- 232}, year = {1987}, language = {en} } @article{KraemerBongaertsBovenbergetal.2003, author = {Kr{\"a}mer, Marco and Bongaerts, Johannes and Bovenberg, Roel and Kremer, Susanne and M{\"u}ller, Ulrike and Orf, Sonja and Wubbolts, Marcel and Raeven, Leon}, title = {Metabolic engineering for microbial production of shikimic acid}, series = {Metabolic engineering}, volume = {Vol. 5}, journal = {Metabolic engineering}, number = {Iss. 4}, issn = {1096-7184 (E-Journal); 1096-7176 (Print)}, pages = {277 -- 283}, year = {2003}, language = {en} } @article{KowollikSchnitzlerBisellietal.2010, author = {Kowollik, S. and Schnitzler, Thomas and Biselli, Manfred and Krueger, R. and Zang, Werner and Peuscher, A. and Schillberg, S. and Fischer, R.}, title = {Die Rolle des Respirationsquotienten in der Zellkulturfermentation}, series = {Chemie Ingenieur Technik}, volume = {82}, journal = {Chemie Ingenieur Technik}, number = {9}, isbn = {Chemie Ingenieur Tec}, pages = {1505 -- 1506}, year = {2010}, language = {de} } @article{KotterXingLi1990, author = {Kotter, Michael and Xing Li, Dong}, title = {Partielle Oxidation von o-Xylol zu Phthals{\"a}reanhydrid an V/Ti-Schalenkatalysatoren : [Synopsis 1898]}, series = {Chemie - Ingenieur - Technik. 62 (1990), H. 11}, journal = {Chemie - Ingenieur - Technik. 62 (1990), H. 11}, isbn = {0009-286X}, pages = {950 -- 951}, year = {1990}, language = {de} } @article{KotterRiekertWeyland1985, author = {Kotter, Michael and Riekert, Lothar and Weyland, Friedrich}, title = {The performance of base metal oxides on ceramic carriers as catalysts for air pollution control}, series = {International chemical engineering. 25 (1985), H. 3}, journal = {International chemical engineering. 25 (1985), H. 3}, isbn = {0020-6318}, pages = {418 -- 427}, year = {1985}, language = {en} } @article{KotterRiekertTurek1989, author = {Kotter, Michael and Riekert, Lothar and Turek, Thomas}, title = {Entfernung von Ammoniak aus Abw{\"a}ssern durch Strippung und Sorption an Zeolithen : [Synopse 1724]}, series = {Chemie - Ingenieur - Technik. 61 (1989), H. 1}, journal = {Chemie - Ingenieur - Technik. 61 (1989), H. 1}, isbn = {0009-286X}, pages = {74 -- 75}, year = {1989}, language = {de} } @article{KotterRiekertSimoncic1986, author = {Kotter, Michael and Riekert, Lothar and Simoncic, V.}, title = {Pristup sintezi industrijskih katalizatora}, series = {Kemija u industriji : casopis kemicara i tehnologa Jugoslavije. 35 (1986)}, journal = {Kemija u industriji : casopis kemicara i tehnologa Jugoslavije. 35 (1986)}, isbn = {0022-9830}, pages = {79 -- 86}, year = {1986}, language = {de} } @article{KotterRiekertWeyland1983, author = {Kotter, Michael and Riekert, L. and Weyland, F.}, title = {Deposition of ternary oxides as active components by impregnation of porous carriers}, series = {Preparation of Catalysts III : scientific bases for the preparation of heterogeneous catalysts ; proceedings of the Third International Symposium, Louvain-la-Neuve, September 6-9, 1982 / ed.: G. Poncelet ... - (Studies in surface science and catalysis ; 16)}, journal = {Preparation of Catalysts III : scientific bases for the preparation of heterogeneous catalysts ; proceedings of the Third International Symposium, Louvain-la-Neuve, September 6-9, 1982 / ed.: G. Poncelet ... - (Studies in surface science and catalysis ; 16)}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, isbn = {0-444-42184-X}, pages = {521 -- 530}, year = {1983}, language = {en} } @article{KotterRiekertWeyland1983, author = {Kotter, Michael and Riekert, L. and Weyland, F.}, title = {Katalytische Abgasreinigung an Nichtedelmetall-Tr{\"a}gerkontakten}, series = {Verfahrenstechnik : VT ; Informationen f{\"u}r Planung, Bau und Betrieb von Apparaten und Anlagen. 17 (1983)}, journal = {Verfahrenstechnik : VT ; Informationen f{\"u}r Planung, Bau und Betrieb von Apparaten und Anlagen. 17 (1983)}, isbn = {0049-5948}, pages = {607 -- 615}, year = {1983}, language = {de} } @article{KotterRiekert1979, author = {Kotter, Michael and Riekert, L.}, title = {The influence of impregnation, drying and activation on the activity and distribution of CuO on \&\#945;-Alumina}, series = {Preparation of Catalysts II : scientific bases for the preparation of heterogeneous catalysts ; Proceedings of the Second International Symposium, Louvain-la-Neuve, September 4-7, 1978 / Eds.: B. Delmon ... - (Studies in surface science and catalysis ; 3)}, journal = {Preparation of Catalysts II : scientific bases for the preparation of heterogeneous catalysts ; Proceedings of the Second International Symposium, Louvain-la-Neuve, September 4-7, 1978 / Eds.: B. Delmon ... - (Studies in surface science and catalysis ; 3)}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, isbn = {0-444-41733-8}, pages = {51 -- 63}, year = {1979}, language = {en} } @article{KotterRiekert1983, author = {Kotter, Michael and Riekert, L.}, title = {Impregnation-type catalysts with nonuniform distribution of the active component}, series = {Chemical engineering fundamentals. 2 (1983)}, journal = {Chemical engineering fundamentals. 2 (1983)}, isbn = {0723-0966}, pages = {19 -- 38}, year = {1983}, language = {en} } @article{KotterRiekert1983, author = {Kotter, Michael and Riekert, L.}, title = {Beeinflussung der Aktivit{\"a}t und Selektivit{\"a}t von Tr{\"a}nkkatalysatoren durch die topographische Verteilung der Aktivkomponente}, series = {Verfahrenstechnik : VT ; Informationen f{\"u}r Planung, Bau und Betrieb von Apparaten und Anlagen. 17 (1983)}, journal = {Verfahrenstechnik : VT ; Informationen f{\"u}r Planung, Bau und Betrieb von Apparaten und Anlagen. 17 (1983)}, isbn = {0049-5948}, pages = {639 -- 658}, year = {1983}, language = {de} } @article{KotterRiekert1987, author = {Kotter, Michael and Riekert, L.}, title = {Tr{\"a}nkkontakte zur partiellen Oxidation von Buten zu Maleins{\"a}ureanhydrid}, series = {Chemie - Ingenieur - Technik. 59 (1987), H. 9}, journal = {Chemie - Ingenieur - Technik. 59 (1987), H. 9}, isbn = {0009-286X}, pages = {733 -- 734}, year = {1987}, language = {de} } @article{KotterLoveraRiekert1976, author = {Kotter, Michael and Lovera, P. and Riekert, L.}, title = {Charakterisierung eines Tr{\"a}gerkatalysators durch effektive Diffusionskoeffizienten, Labyrinthfaktor und mittlere Porenradien}, series = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie}, volume = {80}, journal = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie}, number = {1}, publisher = {Wiley-VCH}, address = {Weinheim}, isbn = {0005-9021}, doi = {10.1002/bbpc.19760800112}, pages = {61 -- 66}, year = {1976}, abstract = {Der effektive Diffusionskoeffizient Deff von Gasen in einem por{\"o}sen Medium h{\"a}ngt im Knudsen- bzw. {\"U}bergangsgebiet 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 fl{\"u}ssigen Phase gef{\"u}llten Poren separat bestimmt wird. An einem Tr{\"a}gerkatalysator (CuO auf γ-Al₂O₃) ergab sich auf diese Weise ein f{\"u}r die Diffusion maßgebender effektiver Porenradius, der in den Bereich der Makroporen f{\"a}llt. Ein Vergleich mit dem aus reaktionskinetischen Daten ermittelten effektiven Diffusionskoeffizienten l{\"a}ßt auf eine ungleichm{\"a}ßige Verteilung der aktiven Komponente im Kontaktkorn schließen.}, language = {de} } @article{KotterLintzWittstock1994, author = {Kotter, Michael and Lintz, Hans-G{\"u}nther and Wittstock, Klaus}, title = {Untersuchung der Zwischenproduktbildung bei der katalytischen Nachverbrennung I{\"o}semittelbeladener Abluft an Nichtedelmetall-Katalysatoren}, series = {Chemie - Ingenieur - Technik. 66 (1994), H. 10}, journal = {Chemie - Ingenieur - Technik. 66 (1994), H. 10}, isbn = {0009-286X}, pages = {1369 -- 1372}, year = {1994}, language = {de} } @article{KotterLintzWeyland1986, author = {Kotter, Michael and Lintz, Hans-G{\"u}nther and Weyland, Friedrich}, title = {Selektive Reduktion von Stickoxiden in Rauchgasen - Stand der Technik und neue Wege}, series = {Chemie - Ingenieur - Technik. 58 (1986), H. 8}, journal = {Chemie - Ingenieur - Technik. 58 (1986), H. 8}, isbn = {0009-286X}, pages = {617 -- 623}, year = {1986}, language = {de} } @article{KotterLintzTurek1992, author = {Kotter, Michael and Lintz, Hans-G{\"u}nther and Turek, Thomas}, title = {Katalytische Stickoxid-Reduktion in einem rotierenden W{\"a}rme{\"u}bertrager}, series = {Chemie - Ingenieur - Technik. 64 (1992), H. 5}, journal = {Chemie - Ingenieur - Technik. 64 (1992), H. 5}, isbn = {0009-286X}, pages = {446 -- 448}, year = {1992}, language = {de} } @article{KotterLintzTurek1992, author = {Kotter, Michael and Lintz, Hans-G{\"u}nther and Turek, Thomas}, title = {Selective catalytic reduction of nitrogen oxide by use of the Ljungstroem air heater as reactor : a case study}, series = {Chemical engineering science . 47 (1992), H. 9-11}, journal = {Chemical engineering science . 47 (1992), H. 9-11}, isbn = {0009-2509}, pages = {2763 -- 2768}, year = {1992}, language = {en} } @article{KotterLintzRiekertetal.1989, author = {Kotter, Michael and Lintz, Hans-G{\"u}nther and Riekert, Lothar and Trimm, D. L.}, title = {Structure and selectivity changes in vanadia-titania catalysts used to promote the reduction of nitric oxide with ammonia}, series = {Applied catalysis. 52 (1989), H. 1}, journal = {Applied catalysis. 52 (1989), H. 1}, isbn = {0166-9834}, pages = {225 -- 235}, year = {1989}, language = {en} } @article{KotterLintz1987, author = {Kotter, Michael and Lintz, Hans-G{\"u}nther}, title = {R{\´e}duction catalytique s{\´e}l{\´e}ktive des oxydes d'azote : une conc{\´e}ption originale}, series = {Entropie. 23 (1987), H. 137/138}, journal = {Entropie. 23 (1987), H. 137/138}, isbn = {0013-9084}, pages = {109 -- 116}, year = {1987}, language = {de} } @article{KotterLiRiekert1990, author = {Kotter, Michael and Li, D. X. and Riekert, Lothar}, title = {Partial oxidation of o-xylene to phthalic anhydride in a structured fixed bed containing a sequence of catalysts}, series = {New developments in selective oxidation : proceedings of an international symposium ; Rimini, Italy, Sept. 18 - 22, 1989 / eds.: G. Centi ... - (Studies in surface science and catalysis ; 55)}, journal = {New developments in selective oxidation : proceedings of an international symposium ; Rimini, Italy, Sept. 18 - 22, 1989 / eds.: G. Centi ... - (Studies in surface science and catalysis ; 55)}, publisher = {Elsevier}, address = {Amsterdam}, isbn = {0-444-88694-X}, pages = {267 -- 274}, year = {1990}, language = {en} } @article{KotterLiRiekert1991, author = {Kotter, Michael and Li, D. X. and Riekert, Lothar}, title = {Partielle Oxidation von o-Xylol zu Phthals{\"a}ureanhydrid in einem strukturierten Festbettreaktor}, series = {Katalyse : katalytische Abgasreinigung, Zeolithe, homogene Katalyse, selektive Reaktionen, Herstellung und Charakterisierung, Ionenleiter, Elektrokatalyse, SLPC-Katalysatoren, Suspensionsphase ; Vortr{\"a}ge von der DECHEMA-Jahrestagung 1990, 31. Mai und 1. Juni 1990 / hrsg. von H. Kral. - (Deutsche Gesellschaft f{\"u}r Chemisches Apparatewesen, Chemische Technik und Biotechnologie: DECHEMA-Monographien ; 122)}, journal = {Katalyse : katalytische Abgasreinigung, Zeolithe, homogene Katalyse, selektive Reaktionen, Herstellung und Charakterisierung, Ionenleiter, Elektrokatalyse, SLPC-Katalysatoren, Suspensionsphase ; Vortr{\"a}ge von der DECHEMA-Jahrestagung 1990, 31. Mai und 1. Juni 1990 / hrsg. von H. Kral. - (Deutsche Gesellschaft f{\"u}r Chemisches Apparatewesen, Chemische Technik und Biotechnologie: DECHEMA-Monographien ; 122)}, publisher = {VCH}, address = {Weinheim}, isbn = {3-527-10216-7}, pages = {93 -- 123}, year = {1991}, language = {de} } @article{KotterKirchRiekert1984, author = {Kotter, Michael and Kirch, M. and Riekert, Lothar}, title = {Einfluß von Dispersion und Vorgeschichte dispersen Nickels auf dessen katalytische Eigenschaften bei der Hydrierung von Benzol, CO2 und CO / R. Kirch ; M. Kotter ; L. Riekert}, series = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 88 (1984)}, journal = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 88 (1984)}, isbn = {0005-9021}, pages = {1054 -- 1057}, year = {1984}, language = {de} } @article{KotterKirchRiekert1984, author = {Kotter, Michael and Kirch, M. and Riekert, L.}, title = {Herstellung von Tr{\"a}nkkatalysatoren mit Nickel als Aktivkomponente auf por{\"o}sen Tr{\"a}gern / R. Kirch ; M. Kotter ; L. Riekert}, series = {Chemiker-Zeitung. 108 (1984), H. 4}, journal = {Chemiker-Zeitung. 108 (1984), H. 4}, isbn = {0009-2894}, pages = {121 -- 129}, year = {1984}, language = {de} } @article{KotterHaefelePrinzetal.1983, author = {Kotter, Michael and H{\"a}fele, E. and Prinz, D. and Riekert, L.}, title = {Versuche zur Konvertierung von Wassergas an Zeolith-Katalysatoren / E. H{\"a}fele ; M. Kotter ; D. Prinz ; L. Riekert}, series = {Chemie - Ingenieur - Technik. 55 (1983), H. 2}, journal = {Chemie - Ingenieur - Technik. 55 (1983), H. 2}, isbn = {0009-286X}, pages = {148 -- 149}, year = {1983}, language = {de} } @article{KotterHoffmann2002, author = {Kotter, Michael and Hoffmann, U.}, title = {Simulation eines geregelten R{\"u}hrkessels mit LABVIEW / U. Hoffmann ; M. Kotter}, series = {Virtuelle Instrumente in der Praxis : Messtechnik, Automatisierung ; Begleitband zum Kongress VIP 2002 / Rahman Jamal ... (Hrsg.). - (Praxiswissen Elektronik-Industrie : Messtechnik - Automatisierung)}, journal = {Virtuelle Instrumente in der Praxis : Messtechnik, Automatisierung ; Begleitband zum Kongress VIP 2002 / Rahman Jamal ... (Hrsg.). - (Praxiswissen Elektronik-Industrie : Messtechnik - Automatisierung)}, publisher = {H{\"u}thig}, address = {Heidelberg [u.a.]}, isbn = {3-7785-2873-4}, pages = {65}, year = {2002}, language = {de} } @article{KotterHeeringRiekert1982, author = {Kotter, Michael and Heering, J. and Riekert, L.}, title = {Diffusion and catalytic reaction in zeolite ZSM-5 / J. Heering ; M. Kotter ; L. Riekert}, series = {Chemical engineering science . 37 (1982), H. 4}, journal = {Chemical engineering science . 37 (1982), H. 4}, isbn = {0009-2509}, pages = {581 -- 584}, year = {1982}, language = {en} } @article{KotterHammonRiekert1989, author = {Kotter, Michael and Hammon, Ulrich and Riekert, Lothar}, title = {Gewinnung niedriger Olefine aus Methanol bei partiellem Umsatz mit R{\"u}ckf{\"u}hrung / U. Hammon ; M. Kotter ; L. Riekert}, series = {Chemie - Ingenieur - Technik. 61 (1989), H. 2}, journal = {Chemie - Ingenieur - Technik. 61 (1989), H. 2}, isbn = {0009-286X}, pages = {151 -- 152}, year = {1989}, language = {de} } @article{KotterHammonRiekert1988, author = {Kotter, Michael and Hammon, Ulrich and Riekert, Lothar}, title = {Formation of ethene and propene from methanol on zeolite ZSM-5 II. Preparation of finished catalysts and operation of a fixed-bed pilot plant / U. Hammon ; M. Kotter ; L. Riekert}, series = {Applied catalysis. 37 (1988)}, journal = {Applied catalysis. 37 (1988)}, isbn = {0166-9834}, pages = {155 -- 174}, year = {1988}, language = {en} } @article{KotterHammon1984, author = {Kotter, Michael and Hammon, Ulrich}, title = {Herstellung von Formk{\"o}rpern mit definierter Porenstruktur / Ulrich Hammon ; Michael Kotter}, series = {Chemie - Ingenieur - Technik. 56 (1984), H. 6}, journal = {Chemie - Ingenieur - Technik. 56 (1984), H. 6}, isbn = {0009-286X}, pages = {455 -- 463}, year = {1984}, language = {de} } @article{KotterHammon1986, author = {Kotter, Michael and Hammon, U.}, title = {Preparation of pellets with well-defined pore structure / U. Hammon ; A. Kotter}, series = {International chemical engineering. 26 (1986), H. 4}, journal = {International chemical engineering. 26 (1986), H. 4}, isbn = {0020-6318}, pages = {563 -- 573}, year = {1986}, language = {en} } @article{KotterGregerIhme1984, author = {Kotter, Michael and Greger, M. and Ihme, B.}, title = {Nonequilibrium phase transitions with hysteresis in solid catalysts : the system copper-oxygen-propene / M. Greger ; B. Ihme ; M. Kotter ...}, series = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 88 (1984)}, journal = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 88 (1984)}, isbn = {0005-9021}, pages = {427 -- 433}, year = {1984}, language = {en} } @article{KotterGrazykGeissleetal.1990, author = {Kotter, Michael and Grazyk, J. and Geißle, W. and Roth, A.}, title = {Fließeigenschaften von Keramiken f{\"u}r die Herstellung von Katalysatortr{\"a}gern / J. Grazyk ; W. Gleißle ; A. Roth ; M. Kotter}, series = {Erd{\"o}l \& Kohle, Erdgas, Petrochemie : EKEP. 43 (1990), H. 1}, journal = {Erd{\"o}l \& Kohle, Erdgas, Petrochemie : EKEP. 43 (1990), H. 1}, isbn = {0014-0058}, pages = {27 -- 30}, year = {1990}, language = {de} } @article{KotterBeckerRiekert1989, author = {Kotter, Michael and Becker, Dieter and Riekert, Lothar}, title = {Zur Selektivit{\"a}t der partiellen Oxidation von Propen an Schalenkatalysatoren / Dieter Becker ; Michael Kotter ; Lothar Riekert}, series = {Chemie - Ingenieur - Technik. 61 (1989), H. 9}, journal = {Chemie - Ingenieur - Technik. 61 (1989), H. 9}, isbn = {0009-286X}, pages = {748 -- 749}, year = {1989}, language = {de} } @article{Kotter1983, author = {Kotter, Michael}, title = {Herstellung von Tr{\"a}nkkatalysatoren als verfahrenstechnische Aufgabe}, series = {Chemie - Ingenieur - Technik. 55 (1983), H. 3}, journal = {Chemie - Ingenieur - Technik. 55 (1983), H. 3}, isbn = {0009-286X}, pages = {179 -- 185}, year = {1983}, language = {de} } @article{Kotter1992, author = {Kotter, Michael}, title = {Katalytische Abluftreinigung mit integriertem regenerativem W{\"a}rmetausch}, series = {Chemie - Ingenieur - Technik. 64 (1992), H. 9}, journal = {Chemie - Ingenieur - Technik. 64 (1992), H. 9}, isbn = {0009-286X}, pages = {848}, year = {1992}, language = {de} } @article{KotnikPopovaTodirasetal.2009, author = {Kotnik, Katarina and Popova, Elena and Todiras, Mihail and Mori, Marcelo A. and Alenina, Natalia and Seibler, Jost and Bader, Michael}, title = {Inducible transgenic rat model for diabetes mellitus based on shRNA-mediated gene knockdown}, series = {Plos One}, volume = {4}, journal = {Plos One}, number = {4}, publisher = {Plos}, address = {San Francisco, California, US}, doi = {10.1371/journal.pone.0005124}, pages = {e5124}, year = {2009}, language = {en} } @article{KornfeldBaitzelKoenneretal.2013, author = {Kornfeld, Jan-Wilhelm and Baitzel, Catherina and K{\"o}nner, A. Christine and Nicholls, Hayley T. and Vogt, Merly C. and Herrmanns, Karolin and Scheja, Ludger and Haumaitre, C{\´e}cile and Wolf, Anna M. and Knippschild, Uwe and Seibler, Jost and Cereghini, Silvia and Heeren, Joerg and Stoffel, Markus and Br{\"u}ning, Jens C.}, title = {Obesity-induced overexpression of miR-802 impairs glucose metabolism through silencing of Hnf1b}, series = {Nature}, volume = {494}, journal = {Nature}, number = {7435}, publisher = {Springer Nature}, address = {Cham}, isbn = {0028-0836}, doi = {10.1038/nature11793}, pages = {111 -- 115}, year = {2013}, language = {en} } @article{KochWunderlichSeibleretal.2008, author = {Koch, Linda and Wunderlich, F. Thomas and Seibler, Jost and K{\"o}nner, A. Christine and Hampel, Brigitte and Irlenbusch, Sigrid and Brabant, Georg and Kahn, C. Ronald and Schwenk, Frieder and Br{\"u}ning, Jens C.}, title = {Central insulin action regulates peripheral glucose and fat metabolism in mice}, series = {The Journal of Clinical Investigation (JCI)}, volume = {118}, journal = {The Journal of Clinical Investigation (JCI)}, number = {6}, issn = {1558-8238}, doi = {10.1172/JCI31073}, pages = {2132 -- 2147}, year = {2008}, language = {en} } @article{KapplerTanudyayaSchmittTippkoetteretal.2007, author = {Kappler-Tanudyaya, Nathalie and Schmitt, Heike and Tippk{\"o}tter, Nils and Meyer, Lina and Lenzen, Sigurd and Ulber, Roland}, title = {Combination of biotransformation and chromatography for the isolation and purification of mannoheptulose}, series = {Biotechnology Journal}, volume = {2}, journal = {Biotechnology Journal}, number = {6}, issn = {1860-7314}, doi = {10.1002/biot.200700004}, pages = {692 -- 699}, year = {2007}, abstract = {Mannoheptulose is a seven-carbon sugar. It is an inhibitor of glucose-induced insulin secretion due to its ability to selectively inhibit the enzyme glucokinase. An improved procedure for mannoheptulose isolation from avocados is described in this study (based upon the original method by La Forge). The study focuses on the combination of biotransformation and downstream processing (preparative chromatography) as an efficient method to produce a pure extract of mannoheptulose. The experiments were divided into two major phases. In the first phase, several methods and parameters were compared to optimize the mannoheptulose extraction with respect to efficiency and purity. In the second phase, a mass balance of mannoheptulose over the whole extraction process was undertaken to estimate the yield and efficiency of the total extraction process. The combination of biotransformation and preparative chromatography allowed the production of a pure mannoheptulose extract. In a biological test, the sugar inhibited the glucokinase enzyme activity efficiently.}, language = {en} } @article{KapelyukhHendersonScheeretal.2019, author = {Kapelyukh, Yury and Henderson, Colin James and Scheer, Nico and Rode, Anja and Wolf, Charles Roland}, title = {Defining the contribution of CYP1A1 and CYP1A2 to drug metabolism using humanized CYP1A1/1A2 and Cyp1a1/Cyp1a2 KO mice}, series = {Drug Metabolism and Disposition}, journal = {Drug Metabolism and Disposition}, number = {Early view}, doi = {10.1124/dmd.119.087718}, pages = {43 Seiten}, year = {2019}, language = {en} } @article{KalbeKuropkaMeyerStorketal.1988, author = {Kalbe, Jochen and Kuropka, Rolf and Meyer-Stork, L. Sebastian and Berndt, Heinz and [u.a.],}, title = {Isolation and characterization of high-molecular mass DNA from hair shafts}, series = {Biological chemistry}, volume = {369}, journal = {Biological chemistry}, number = {1}, isbn = {0177-3593}, doi = {10.1515/bchm3.1988.369.1.413}, pages = {413 -- 416}, year = {1988}, language = {en} } @article{KalbeHoeckerBerndt1989, author = {Kalbe, Jochen and H{\"o}cker, Hartwig and Berndt, Heinz}, title = {Design of enzyme reactors as chromatographic columns for racemic resolution of amino acid esters}, series = {Chromatographia}, volume = {28}, journal = {Chromatographia}, number = {3-4}, isbn = {0009-5893}, doi = {10.1007/BF02319646}, pages = {193 -- 196}, year = {1989}, language = {en} } @article{JossekBongaertsSprenger2001, author = {Jossek, Ralf and Bongaerts, Johannes and Sprenger, Georg A.}, title = {Characterization of a new feedback-resistant 3-deoxy-D-arabinoheptulosonate 7-phosphate synthase AroF of Escherichia coli}, series = {FEMS microbiology letters}, volume = {Vol. 202}, journal = {FEMS microbiology letters}, number = {Iss. 1}, issn = {1574-6968}, pages = {145 -- 148}, year = {2001}, language = {en} } @article{JordanKruegerWillmesetal.2011, author = {Jordan, Sabine D. and Kr{\"u}ger, Markus and Willmes, Diana M. and Redemann, Nora and Wunderlich, F. Thomas and Br{\"o}nneke, Hella S. and Merkwirth, Carsten and Kashkar, Hamid and Olkkonen, Vesa M. and B{\"o}ttger, Thomas and Braun, Thomas and Seibler, Jost and Br{\"u}ning, Jens C.}, title = {Obesity-induced overexpression of miRNA-143 inhibits insulin-stimulated AKT activation and impairs glucose metabolism}, series = {Nature Cell Biology}, volume = {13}, journal = {Nature Cell Biology}, number = {4}, publisher = {Nature}, address = {New York}, issn = {1465-7392}, doi = {10.1038/ncb2211}, pages = {434 -- 446}, year = {2011}, abstract = {The contribution of altered post-transcriptional gene silencing to the development of insulin resistance and type 2 diabetes mellitus so far remains elusive. Here, we demonstrate that expression of microRNA (miR)-143 and 145 is upregulated in the liver of genetic and dietary mouse models of obesity. Induced transgenic overexpression of miR-143, but not miR-145, impairs insulin-stimulated AKT activation and glucose homeostasis. Conversely, mice deficient for the miR-143-145 cluster are protected from the development of obesity-associated insulin resistance. Quantitative-mass-spectrometry-based analysis of hepatic protein expression in miR-143-overexpressing mice revealed miR-143-dependent downregulation of oxysterol-binding-protein-related protein (ORP) 8. Reduced ORP8 expression in cultured liver cells impairs the ability of insulin to induce AKT activation, revealing an ORP8-dependent mechanism of AKT regulation. Our experiments provide direct evidence that dysregulated post-transcriptional gene silencing contributes to the development of obesity-induced insulin resistance, and characterize the miR-143-ORP8 pathway as a potential target for the treatment of obesity-associated diabetes.}, language = {en} } @article{JerominZoor2008, author = {Jeromin, G{\"u}nter Erich and Zoor, Annegreth}, title = {A new irreversible enzyme-aided esterification method in organic solvents}, series = {Biotechnology letters. 30 (2008), H. 5}, journal = {Biotechnology letters. 30 (2008), H. 5}, isbn = {1573-6776}, pages = {925 -- 928}, year = {2008}, language = {en} } @article{JerominWelsch1995, author = {Jeromin, G{\"u}nter Erich and Welsch, Volker}, title = {Diketene a New Esterification Reagent in the Enzyme-Aided Synthesis of Chiral Alcohols and Chiral Acetoacetic Acid Esters}, series = {Tetrahedron Letters . 36 (1995), H. 37}, journal = {Tetrahedron Letters . 36 (1995), H. 37}, isbn = {0040-4039}, pages = {6663 -- 6664}, year = {1995}, language = {en} } @article{JerominWeise1990, author = {Jeromin, G{\"u}nter Erich and Weise, Sven}, title = {Enzymatische Acetylierung von (±)-1-Phthalimido-2-propanol}, series = {Liebigs Annalen der Chemie (1990)}, journal = {Liebigs Annalen der Chemie (1990)}, isbn = {0947-3440}, pages = {1045 -- 1046}, year = {1990}, language = {de} } @article{JerominScheidt1991, author = {Jeromin, G{\"u}nter Erich and Scheidt, Annette}, title = {Aliphatic optically active alcohols by enzyme-aided synthesis}, series = {Tetrahedron Letters . 32 (1991), H. 48}, journal = {Tetrahedron Letters . 32 (1991), H. 48}, isbn = {0040-4039}, pages = {7021 -- 7024}, year = {1991}, language = {en} } @article{JerominAlbertz1992, author = {Jeromin, G{\"u}nter Erich and Albertz, Michael}, title = {Optically active \&\#945;-acetoxycarboxylic acids and \&\#945;-hydroxycarboxylic acids by enzyme-aided syntheses}, series = {Journal f{\"u}r Praktische Chemie / Chemiker-Zeitung. 334 (1992), H. 6}, journal = {Journal f{\"u}r Praktische Chemie / Chemiker-Zeitung. 334 (1992), H. 6}, isbn = {1436-9966}, pages = {526 -- 528}, year = {1992}, language = {en} } @article{Jeromin2001, author = {Jeromin, G{\"u}nter Erich}, title = {Tetrabenzo[a,c,h,j]phenoxazine-18-yl a new stable neutral radical}, series = {Tetrahedron Letters . 42 (2001), H. 10}, journal = {Tetrahedron Letters . 42 (2001), H. 10}, isbn = {0040-4039}, pages = {1863 -- 1865}, year = {2001}, language = {en} } @article{Jeromin2009, author = {Jeromin, G{\"u}nter Erich}, title = {Superabsorbed alcohol dehydrogenase—a new catalyst for asymmetric reductions}, series = {Biotechnology Letters. 31 (2009), H. 11}, journal = {Biotechnology Letters. 31 (2009), H. 11}, isbn = {0141-5492}, pages = {1717 -- 1721}, year = {2009}, language = {en} } @article{JakobMartinezMandaweetal.2013, author = {Jakob, Felix and Martinez, Ronny and Mandawe, John and Hellmuth, Hendrik and Siegert, Petra and Maurer, Karl-Heinz and Schwaneberg, Ulrich}, title = {Surface charge engineering of a Bacillus gibsonii subtilisin protease}, series = {Applied microbiology and biotechnology}, volume = {Vol. 97}, journal = {Applied microbiology and biotechnology}, number = {Iss. 15}, publisher = {Springer}, address = {Berlin}, issn = {1432-0614 (E-Journal); 0171-1741 (Print); 0175-7598 (Print); 0340-2118 (Print)}, pages = {6793 -- 6802}, year = {2013}, language = {en} } @article{JahnkeBaumann1987, author = {Jahnke, J. and Baumann, Marcus}, title = {Differentiation between Phaeocystis pouchetii (Har.) Lagerheim and Phaeocystis globosa Scherffel}, series = {Hydrobiological bulletin}, volume = {Vol. 21}, journal = {Hydrobiological bulletin}, number = {Iss. 2}, issn = {0165-1404 (Print); 1573-5125 (E-Journal)}, pages = {141 -- 147}, year = {1987}, language = {en} } @article{JablonskiMuenstermannNorketal.2021, author = {Jablonski, Melanie and M{\"u}nstermann, Felix and Nork, Jasmina and Molinnus, Denise and Muschallik, Lukas and Bongaerts, Johannes and Wagner, Torsten and Keusgen, Michael and Siegert, Petra and Sch{\"o}ning, Michael Josef}, title = {Capacitive field-effect biosensor applied for the detection of acetoin in alcoholic beverages and fermentation broths}, series = {physica status solidi (a) applications and materials science}, volume = {218}, journal = {physica status solidi (a) applications and materials science}, number = {13}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1862-6319}, doi = {10.1002/pssa.202000765}, pages = {7 Seiten}, year = {2021}, abstract = {An acetoin biosensor based on a capacitive electrolyte-insulator-semiconductor (EIS) structure modified with the enzyme acetoin reductase, also known as butane-2,3-diol dehydrogenase (Bacillus clausii DSM 8716ᵀ), is applied for acetoin detection in beer, red wine, and fermentation broth samples for the first time. The EIS sensor consists of an Al/p-Si/SiO₂/Ta₂O₅ layer structure with immobilized acetoin reductase on top of the Ta₂O₅ transducer layer by means of crosslinking via glutaraldehyde. The unmodified and enzyme-modified sensors are electrochemically characterized by means of leakage current, capacitance-voltage, and constant capacitance methods, respectively.}, language = {en} } @article{InfantinoPaulssenMostaccietal.2016, author = {Infantino, Angelo and Paulßen, Elisabeth and Mostacci, Domiziano and Schaffer, Paul and Trinczek, Michael and Hoehr, Cornelia}, title = {Assessment of the production of medical isotopes using the Monte Carlo code FLUKA: Simulations against experimental measurements}, series = {Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms}, volume = {366}, journal = {Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1872-9584}, doi = {10.1016/j.nimb.2015.10.067}, pages = {117 -- 123}, year = {2016}, abstract = {The Monte Carlo code FLUKA is used to simulate the production of a number of positron emitting radionuclides, ¹⁸F, ¹³N, ⁹⁴Tc, ⁴⁴Sc, ⁶⁸Ga, ⁸⁶Y, ⁸⁹Zr, ⁵²Mn, ⁶¹Cu and ⁵⁵Co, on a small medical cyclotron with a proton beam energy of 13 MeV. Experimental data collected at the TR13 cyclotron at TRIUMF agree within a factor of 0.6 ± 0.4 with the directly simulated data, except for the production of ⁵⁵Co, where the simulation underestimates the experiment by a factor of 3.4 ± 0.4. The experimental data also agree within a factor of 0.8 ± 0.6 with the convolution of simulated proton fluence and cross sections from literature. Overall, this confirms the applicability of FLUKA to simulate radionuclide production at 13 MeV proton beam energy.}, language = {en} } @article{InagakiSleddensLinkelsWassenaaretal.2011, author = {Inagaki, Akiko and Sleddens-Linkels, Esther and Wassenaar, Evelyne and Ooms, Marja and Cappellen, Wiggert A. van and Hoeijmakers, Jan H. J. and Seibler, Jost and Vogt, Thomas F. and Shin, Myung K. and Grootegoed, J. Anton and Baarends, Willy M.}, title = {Meiotic functions of RAD18}, series = {Journal of Cell Science}, volume = {124}, journal = {Journal of Cell Science}, number = {16}, publisher = {Company of Biologists Limited}, address = {Cambridge}, issn = {1477-9137}, doi = {10.1242/jcs.081968}, pages = {2837 -- 2850}, year = {2011}, language = {en} } @article{ImmelGruetzkeSpaeteetal.2012, author = {Immel, Timo and Gr{\"u}tzke, Martin and Sp{\"a}te, Anne-Katrin and Groth, Ulrich and {\"O}hlschl{\"a}ger, Peter and Huhn, Thomas}, title = {Synthesis and X-ray structure analysis of a heptacoordinate titanium(IV)-bis-chelate with enhanced in vivo antitumor efficacy}, series = {Chemical Communications}, volume = {48}, journal = {Chemical Communications}, number = {46}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1364-548X}, doi = {10.1039/C2CC31624B}, pages = {5790 -- 5792}, year = {2012}, abstract = {Chelate stabilization of a titanium(IV)-salan alkoxide by ligand exchange with 2,6-pyridinedicarboxylic acid (dipic) resulted in heptacoordinate complex 3 which is not redox-active, stable on silica gel and has increased aqueous stability. 3 is highly toxic in HeLa S3 and Hep G2 and has enhanced antitumor efficacy in a mouse cervical-cancer model.}, language = {en} } @article{ImmelGrothHuhnetal.2011, author = {Immel, Timo A. and Groth, Ulrich and Huhn, Thomas and {\"O}hlschl{\"a}ger, Peter}, title = {Titanium salan complexes displays strong antitumor properties in vitro and in vivo in mice}, series = {PLoS ONE}, volume = {6}, journal = {PLoS ONE}, number = {3}, publisher = {Plos}, address = {San Francisco, California, US}, doi = {10.1371/journal.pone.0017869}, pages = {e17869}, year = {2011}, abstract = {The anticancer activity of titanium complexes has been known since the groundbreaking studies of K{\"o}pf and K{\"o}pf-Maier on titanocen dichloride. Unfortunately, possibly due to their fast hydrolysis, derivatives of titanocen dichloride failed in clinical studies. Recently, the new family of titanium salan complexes containing tetradentate ONNO ligands with anti-cancer properties has been discovered. These salan complexes are much more stabile in aqueous media. In this study we describe the biological activity of two titanium salan complexes in a mouse model of cervical cancer. High efficiency of this promising complex family was demonstrated for the first time in vivo. From these data we conclude that titanium salan complexes display very strong antitumor properties exhibiting only minor side effects. Our results may influence the chemotherapy with metallo therapeutics in the future.}, language = {en} } @article{IdingSiegertMeschetal.1998, author = {Iding, Hans and Siegert, Petra and Mesch, K. and Pohl, Martina}, title = {Application of α-keto acid decarboxylases in biotransformations}, series = {Biochimica et biophysica acta (BBA) - Protein structure and molecular enzymology}, volume = {Vol. 1385}, journal = {Biochimica et biophysica acta (BBA) - Protein structure and molecular enzymology}, number = {Iss. 2}, issn = {1879-2588 (E-Journal); 0167-4838 (Print)}, pages = {307 -- 322}, year = {1998}, language = {en} } @article{IdingDuennwaldGreineretal.2000, author = {Iding, Hans and D{\"u}nnwald, Thomas and Greiner, Lasse and Liese, Andreas and M{\"u}ller, Michael and Siegert, Petra and Gr{\"o}tzinger, Joachim and Demir, Ayhan S. and Pohl, Martina}, title = {Benzoylformate Decarboxylase from Pseudomonas putida as Stable Catalyst for the Synthesis of Chiral 2-Hydroxy Ketones}, series = {Chemistry - a European journal}, volume = {Vol. 6}, journal = {Chemistry - a European journal}, number = {Iss. 8}, issn = {1521-3765 (E-Journal); 0947-6539 (Print)}, pages = {1483 -- 1495}, year = {2000}, language = {en} } @article{IberSchuebelerSeibleretal.1998, author = {Iber, Michaela and Sch{\"u}beler, Dirk and Seibler, Jost and H{\"o}xter, Maria and Bode, J{\"u}rgen}, title = {Efficient FACS selection procedure for cells undergoing Flp-mediated site-specific conversions}, series = {Technical Tips Online}, volume = {4}, journal = {Technical Tips Online}, number = {1}, doi = {10.1016/S1366-2120(08)70132-6}, pages = {25 -- 29}, year = {1998}, language = {en} } @article{HuckSchiffelsHerreraetal.2013, author = {Huck, Christina and Schiffels, Johannes and Herrera, Cony N. and Schelden, Maximilian and Selmer, Thorsten and Poghossian, Arshak and Baumann, Marcus and Wagner, Patrick and Sch{\"o}ning, Michael Josef}, title = {Metabolic responses of Escherichia coli upon glucose pulses captured by a capacitive field-effect sensor}, series = {Physica Status Solidi (A)}, volume = {210}, journal = {Physica Status Solidi (A)}, number = {5}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0031-8965}, doi = {10.1002/pssa.201200900}, pages = {926 -- 931}, year = {2013}, abstract = {Living cells are complex biological systems transforming metabolites taken up from the surrounding medium. Monitoring the responses of such cells to certain substrate concentrations is a challenging task and offers possibilities to gain insight into the vitality of a community influenced by the growth environment. Cell-based sensors represent a promising platform for monitoring the metabolic activity and thus, the "welfare" of relevant organisms. In the present study, metabolic responses of the model bacterium Escherichia coli in suspension, layered onto a capacitive field-effect structure, were examined to pulses of glucose in the concentration range between 0.05 and 2 mM. It was found that acidification of the surrounding medium takes place immediately after glucose addition and follows Michaelis-Menten kinetic behavior as a function of the glucose concentration. In future, the presented setup can, therefore, be used to study substrate specificities on the enzymatic level and may as well be used to perform investigations of more complex metabolic responses. Conclusions and perspectives highlighting this system are discussed.}, language = {en} } @article{HoughNalwalkDingetal.2015, author = {Hough, Lindsay B. and Nalwalk, Julia W. and Ding, Xinxin and Scheer, Nico}, title = {Opioid Analgesia in P450 Gene Cluster Knockout Mice: A Search for Analgesia-Relevant Isoforms}, series = {Drug Metabolism and Disposition}, volume = {43}, journal = {Drug Metabolism and Disposition}, number = {9}, issn = {1521-009x}, doi = {10.1124/dmd.115.065490}, pages = {1326 -- 1330}, year = {2015}, language = {en} } @article{HoffstadtNikolauszKrafftetal.2024, author = {Hoffstadt, Kevin and Nikolausz, Marcell and Krafft, Simone and Bonatelli, Maria and Kumar, Vivekanantha and Harms, Hauke and Kuperjans, Isabel}, title = {Optimization of the ex situ biomethanation of hydrogen and carbon dioxide in a novel meandering plug flow reactor: start-up phase and flexible operation}, series = {Bioengineering}, volume = {11}, journal = {Bioengineering}, number = {2}, publisher = {MDPI}, address = {Basel}, issn = {2306-5354}, doi = {10.3390/bioengineering11020165}, pages = {18 Seiten}, year = {2024}, language = {en} } @article{HoffstadtCheenakulaNikolauszetal.2023, author = {Hoffstadt, Kevin and Cheenakula, Dheeraja and Nikolausz, Marcell and Krafft, Simone and Harms, Hauke and Kuperjans, Isabel}, title = {Design and construction of a new reactor for flexible biomethanation of hydrogen}, series = {Fermentation}, volume = {9}, journal = {Fermentation}, number = {8}, publisher = {MDPI}, address = {Basel}, issn = {2311-5637}, doi = {10.3390/fermentation9080774}, pages = {1 -- 16}, year = {2023}, abstract = {The increasing share of renewable electricity in the grid drives the need for sufficient storage capacity. Especially for seasonal storage, power-to-gas can be a promising approach. Biologically produced methane from hydrogen produced from surplus electricity can be used to substitute natural gas in the existing infrastructure. Current reactor types are not or are poorly optimized for flexible methanation. Therefore, this work proposes a new reactor type with a plug flow reactor (PFR) design. Simulations in COMSOL Multiphysics ® showed promising properties for operation in laminar flow. An experiment was conducted to support the simulation results and to determine the gas fraction of the novel reactor, which was measured to be 29\%. Based on these simulations and experimental results, the reactor was constructed as a 14 m long, 50 mm diameter tube with a meandering orientation. Data processing was established, and a step experiment was performed. In addition, a kLa of 1 h-1 was determined. The results revealed that the experimental outcomes of the type of flow and gas fractions are in line with the theoretical simulation. The new design shows promising properties for flexible methanation and will be tested.}, language = {en} } @article{HoehrPaulssenBenardetal.2014, author = {Hoehr, Cornelia and Paulßen, Elisabeth and Benard, Francois and Lee, Chris Jaeil and Hou, Xinchi and Badesso, Brian and Ferguson, Simon and Miao, Qing and Yang, Hua and Buckley, Ken and Hanemaayer, Victoire and Zeisler, Stefan and Ruth, Thomas and Celler, Anna and Schaffer, Paul}, title = {⁴⁴ᶢSc production using a water target on a 13 MeV cyclotron}, series = {Nuclear medicine and biology}, volume = {41}, journal = {Nuclear medicine and biology}, number = {5}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1872-9614}, doi = {10.1016/j.nucmedbio.2013.12.016}, pages = {401 -- 406}, year = {2014}, abstract = {Access to promising radiometals as isotopes for novel molecular imaging agents requires that they are routinely available and inexpensive to obtain. Proximity to a cyclotron center outfitted with solid target hardware, or to an isotope generator for the metal of interest is necessary, both of which can introduce significant hurdles in development of less common isotopes. Herein, we describe the production of ⁴⁴Sc (t₁⸝₂ = 3.97 h, Eavg,β⁺ = 1.47 MeV, branching ratio = 94.27\%) in a solution target and an automated loading system which allows a quick turn-around between different radiometallic isotopes and therefore greatly improves their availability for tracer development. Experimental yields are compared to theoretical calculations.}, language = {en} } @article{HeroldBrandtSeibleretal.2008, author = {Herold, Marco J. and Brandt, Jens van den and Seibler, Jost and Reichardt, Holger M.}, title = {Inducible and reversible gene silencing by stable integration of an shRNA-encoding lentivirus in transgenic rats}, series = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {105}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, number = {47}, issn = {1091-6490}, doi = {10.1073/pnas.0806213105}, pages = {18507 -- 18512}, year = {2008}, language = {en} } @article{HentschkeHagerHojdis2014, author = {Hentschke, Reinhard and Hager, Jonathan and Hojdis, Nils}, title = {Molecular Modeling Approach to the Prediction of Mechanical Properties of Silica-Reinforced Rubbers}, series = {Journal of Applied Polymer Science}, volume = {131}, journal = {Journal of Applied Polymer Science}, number = {18}, publisher = {Wiley}, address = {New York, NY}, issn = {1097-4628}, doi = {10.1002/app.40806}, pages = {1 -- 9}, year = {2014}, abstract = {Recently, we have suggested a nanomechanical model for dissipative loss in filled elastomer networks in the context of the Payne effect. The mechanism is based on a total interfiller particle force exhibiting an intermittent loop, due to the combination of short-range repulsion and dispersion forces with a long-range elastic attraction. The sum of these forces leads, under external strain, to a spontaneous instability of "bonds" between the aggregates in a filler network and attendant energy dissipation. Here, we use molecular dynamics simulations to obtain chemically realistic forces between surface modified silica particles. The latter are combined with the above model to estimate the loss modulus and the low strain storage modulus in elastomers containing the aforementioned filler-compatibilizer systems. The model is compared to experimental dynamic moduli of silica filled rubbers. We find good agreement between the model predictions and the experiments as function of the compatibilizer's molecular structure and its bulk concentration.}, language = {en} } @article{HenkenOosterhuisOehlschlaegeretal.2012, author = {Henken, F. E. and Oosterhuis, K. and {\"O}hlschl{\"a}ger, Peter and Bosch, L. and Hooijberg, E. and Haanen, J. B. A. G. and Steenbergen, R. D. M.}, title = {Preclinical safety evaluation of DNA vaccines encoding modified HPV16 E6 and E7}, series = {Vaccine}, volume = {30}, journal = {Vaccine}, number = {28}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0264-410X}, doi = {10.1016/j.vaccine.2012.04.013}, pages = {4259 -- 4266}, year = {2012}, abstract = {Persistent infection with high-risk human papillomaviruses (hrHPV) can result in the formation of anogenital cancers. As hrHPV proteins E6 and E7 are required for cancer initiation and maintenance, they are ideal targets for immunotherapeutic interventions. Previously, we have described the development of DNA vaccines for the induction of HPV16 E6 and E7 specific T cell immunity. These vaccines consist of 'gene-shuffled' (SH) versions of HPV16 E6 and E7 that were fused to Tetanus Toxin Fragment C domain 1 (TTFC) and were named TTFC-E6SH and TTFC-E7SH. Gene-shuffling was performed to avoid the risk of inducing malignant transformation at the vaccination site. Here, we describe the preclinical safety evaluation of these candidate vaccines by analysis of their transforming capacity in vitro using established murine fibroblasts (NIH 3T3 cells) and primary human foreskin keratinocytes (HFKs). We demonstrate that neither ectopic expression of TTFC-E6SH and TTFC-E7SH alone or in combination enabled NIH 3T3 cells to form colonies in soft agar. In contrast, expression of HPV16 E6WT and E7WT alone or in combination resulted in effective transformation. Similarly, retroviral transduction of HFKs from three independent donors with both TTFC-E6SH and TTFC-E7SH alone or in combination did not show any signs of immortalization. In contrast, the combined expression of E6WT and E7WT induced immortalization in HFKs from all donors. Based on these results we consider it justified to proceed to clinical evaluation of DNA vaccines encoding TTFC-E6SH and TTFC-E7SH in patients with HPV16 associated (pre)malignancies.}, language = {en} } @article{HendersonScheerWolf2009, author = {Henderson, Colin J. and Scheer, Nico and Wolf, C. Roland}, title = {Advances in the generation of mouse models to elucidate the pathways of drug metabolism in rodents and man}, series = {Expert Review of Clinical Pharmacology}, volume = {2}, journal = {Expert Review of Clinical Pharmacology}, number = {2}, publisher = {Taylor \& Francis}, address = {London}, issn = {1751-2441}, doi = {10.1586/17512433.2.2.105}, pages = {105 -- 109}, year = {2009}, language = {en} } @article{HendersonMclaughlinScheeretal.2015, author = {Henderson, Colin J. and Mclaughlin, Lesley A. and Scheer, Nico and Stanley, Lesley A. and Wolf, C. Roland}, title = {Cytochrome b5 Is a Major Determinant of Human Cytochrome P450 CYP2D6 and CYP3A4 Activity In Vivo s}, series = {Molecular Pharmacology}, volume = {87}, journal = {Molecular Pharmacology}, number = {4}, publisher = {ASPET}, address = {Bethesda}, issn = {1521-0111}, doi = {10.1124/mol.114.097394}, pages = {733 -- 739}, year = {2015}, language = {en} } @article{HemmerlingMerschenzQuackWunderlich1988, author = {Hemmerling, H.-J. and Merschenz-Quack, Angelika and Wunderlich, H.}, title = {Crystal structures of indeno[1,2-d]imidazoles. XIth European Crystallographic Meeting, Vienna 1988}, series = {Zeitschrift f{\"u}r Kristallographie - Crystalline Materials}, volume = {185}, journal = {Zeitschrift f{\"u}r Kristallographie - Crystalline Materials}, number = {H. 1-4}, issn = {2196-7105 (E-Books); 2194-4946 (Print)}, pages = {256}, year = {1988}, language = {en} } @article{HeinzeMangPeteretal.2014, author = {Heinze, Daniel and Mang, Thomas and Peter, Karin and M{\"o}ller, Martin and Weichold, Oliver}, title = {Synthesis of low molecular weight poly(vinyl acetate) and its application as plasticizer}, series = {Journal of applied polymer science}, volume = {131}, journal = {Journal of applied polymer science}, number = {9}, publisher = {Wiley}, address = {New York}, issn = {1097-4628 (E-Journal); 0021-8995 (Print)}, doi = {10.1002/app.40226}, pages = {Article No. 40226}, year = {2014}, abstract = {Poly(vinyl acetate), PVAc, with a degree of polymerization Xn = 10 was prepared by chain-transfer radical polymerization using carbon tetrachloride and used as oligomeric plasticizer for commercial PVAc. However, the chlorinated chain ends cause a low thermal stability requiring mild Cl/H substitution. The product exhibits high thermal stability and excellent melt-compounding properties. Blends of oligomeric and commercial PVAc show single glass transition temperatures which decrease with higher oligomer content and exhibit small negative deviations from Fox' linear additivity rule. This indicates plasticization and miscibility being mainly due to entropic effects. Injection-moulded thick specimens show ductile behaviour at oligomer contents >10 wt \%, while sheets with a thickness of 0.2-0.5 mm appear flexible already at 7.5 wt \%. The oxygen permeability coefficients are an order of magnitude lower than those of low-density polyethylene. Due to the sum of their properties, the plasticized sheets present a promising alternative in the preparation of barrier materials.}, language = {en} } @article{HeinzeMangPopescuetal.2016, author = {Heinze, D. and Mang, Thomas and Popescu, C. and Weichold, O.}, title = {Effect of side chain length and degree of polymerization on the decomposition and crystallization behaviour of chlorinated poly(vinyl ester) oligomers}, series = {Thermochimica Acta}, volume = {637}, journal = {Thermochimica Acta}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0040-6031 (electronic)}, doi = {10.1016/j.tca.2016.05.015}, pages = {143 -- 153}, year = {2016}, abstract = {Four members of a homologous series of chlorinated poly(vinyl ester) oligomers CCl₃-(CH₂CH (OCO(CH₂)ₘCH₃))ₙ-Cl with degrees of polymerization of 10 and 20 were prepared by telomerisation using carbon tetrachloride. The number of side chain carbon atoms ranges from 2 (poly(vinyl acetate) to 18 (poly(vinyl stearate)). The effect of the n-alkyl side chain length and of the degree of polymerization on the thermal stability and crystallization behaviour of the synthesized compounds was investigated. All oligomers degrade in two major steps by first losing HCl and side chains with subsequent breakdown of the backbone. The members with short side chains, up to poly(vinyl octanoate), are amorphous and show internal plasticization, whereas those with high number of side chain carbon atoms are semi-crystalline due to side-chain crystallization. A better packing for poly(vinyl stearate) is also noticeable. The glass transition and melting temperatures as well as the onset temperature of decomposition are influenced to a larger extent by the side chain length than by the degree of polymerization. Thermal stability is improved if both the size and number of side chains increase, but only a long side chain causes a significant increase of the resistance to degradation. This results in a stabilization of PVAc so that oligomers from poly(vinyl octanoate) on are stable under atmospheric conditions. Thus, the way to design stable, chlorinated PVEs oligomers is to use a long n-alkyl side chain.}, language = {en} } @article{HeineHerrmannSelmeretal.2014, author = {Heine, A. and Herrmann, G. and Selmer, Thorsten and Terwesten, F. and Buckel, W. and Reuter, K.}, title = {High resolution crystal structure of clostridium propionicum β-Alanyl-CoA:Ammonia Lyase, a new member of the "Hot Dog Fold" protein superfamily}, series = {Proteins}, volume = {82}, journal = {Proteins}, number = {9}, publisher = {Wiley-Liss}, address = {New York}, issn = {1097-0134 (E-Journal); 0887-3585 (Print)}, doi = {10.1002/prot.24557}, pages = {2041 -- 2053}, year = {2014}, abstract = {Clostridium propionicum is the only organism known to ferment β-alanine, a constituent of coenzyme A (CoA) and the phosphopantetheinyl prosthetic group of holo-acyl carrier protein. The first step in the fermentation is a CoA-transfer to β-alanine. Subsequently, the resulting β-alanyl-CoA is deaminated by the enzyme β-alanyl-CoA:ammonia lyase (Acl) to reversibly form ammonia and acrylyl-CoA. We have determined the crystal structure of Acl in its apo-form at a resolution of 0.97 {\AA} as well as in complex with CoA at a resolution of 1.59 {\AA}. The structures reveal that the enyzme belongs to a superfamily of proteins exhibiting a so called "hot dog fold" which is characterized by a five-stranded antiparallel β-sheet with a long α-helix packed against it. The functional unit of all "hot dog fold" proteins is a homodimer containing two equivalent substrate binding sites which are established by the dimer interface. In the case of Acl, three functional dimers combine to a homohexamer strongly resembling the homohexamer formed by YciA-like acyl-CoA thioesterases. Here, we propose an enzymatic mechanism based on the crystal structure of the Acl·CoA complex and molecular docking. Proteins 2014; 82:2041-2053. © 2014 Wiley Periodicals, Inc.}, language = {en} } @article{HasegawaKapelyukhTaharaetal.2011, author = {Hasegawa, Maki and Kapelyukh, Yury and Tahara, Harunobu and Seibler, Jost and Rode, Anja and Krueger, Sylvia and Lee, Dongtao N. and Wolf, C. Roland and Scheer, Nico}, title = {Quantitative prediction of human pregnane X receptor and cytochrome P450 3A4 mediated drug-drug interaction in a novel multiple humanized mouse line}, series = {Molecular Pharmacology}, volume = {80}, journal = {Molecular Pharmacology}, number = {33}, publisher = {ASPET}, address = {Bethesda, Md.}, issn = {1521-0111}, doi = {10.1124/mol.111.071845}, pages = {518 -- 528}, year = {2011}, language = {en} } @article{HarishWriggersJungketal.2016, author = {Harish, Ajay B. and Wriggers, Peter and Jungk, Juliane and Hojdis, Nils and Recker, Carla}, title = {Mesoscale Constitutive Modeling of Non-Crystallizing Filled Elastomers}, series = {Computational Mechanics}, volume = {57}, journal = {Computational Mechanics}, publisher = {Springer}, address = {Berlin}, issn = {1432-0924}, doi = {10.1007/s00466-015-1251-1}, pages = {653 -- 677}, year = {2016}, abstract = {Elastomers are exceptional materials owing to their ability to undergo large deformations before failure. However, due to their very low stiffness, they are not always suitable for industrial applications. Addition of filler particles provides reinforcing effects and thus enhances the material properties that render them more versatile for applications like tyres etc. However, deformation behavior of filled polymers is accompanied by several nonlinear effects like Mullins and Payne effect. To this day, the physical and chemical changes resulting in such nonlinear effect remain an active area of research. In this work, we develop a heterogeneous (or multiphase) constitutive model at the mesoscale explicitly considering filler particle aggregates, elastomeric matrix and their mechanical interaction through an approximate interface layer. The developed constitutive model is used to demonstrate cluster breakage, also, as one of the possible sources for Mullins effect observed in non-crystallizing filled elastomers.}, language = {en} } @article{HansScheerRiedletal.2004, author = {Hans, Stefan and Scheer, Nico and Riedl, Iris and Weiz{\"a}cker, Elisabeth von and Blader, Patrick and Campos-Ortega, Jos{\´e} A.}, title = {her3, a zebrafish member of the hairy-E(spl) family, is repressed by Notch signalling}, series = {Development}, volume = {131}, journal = {Development}, number = {12}, issn = {1477-9129}, doi = {10.1242/dev.01167}, pages = {2957 -- 2969}, year = {2004}, language = {en} } @article{HandtkeVollandMethlingetal.2014, author = {Handtke, Stefan and Volland, Sonja and Methling, Karen and Albrecht, Dirk and Becher, D{\"o}rte and Nehls, Jenny and Bongaerts, Johannes and Maurer, Karl-Heinz and Lalk, Michael and Liesegang, Heiko and Voigt, Birgit and Daniel, Rolf and Hecker, Michael}, title = {Cell physiology of the biotechnological relevant bacterium Bacillus pumilus - An omics-based approach}, series = {Journal of Biotechnology}, journal = {Journal of Biotechnology}, number = {192(A)}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-4863 (E-Journal); 0168-1656 (Print)}, doi = {10.1016/j.jbiotec.2014.08.028}, pages = {204 -- 214}, year = {2014}, abstract = {Members of the species Bacillus pumilus get more and more in focus of the biotechnological industry as potential new production strains. Based on exoproteome analysis, B. pumilus strain Jo2, possessing a high secretion capability, was chosen for an omics-based investigation. The proteome and metabolome of B. pumilus cells growing either in minimal or complex medium was analyzed. In total, 1542 proteins were identified in growing B. pumilus cells, among them 1182 cytosolic proteins, 297 membrane and lipoproteins and 63 secreted proteins. This accounts for about 43\% of the 3616 proteins encoded in the B. pumilus Jo2 genome sequence. By using GC-MS, IP-LC/MS and H NMR methods numerous metabolites were analyzed and assigned to reconstructed metabolic pathways. In the genome sequence a functional secretion system including the components of the Sec- and Tat-secretion machinery was found. Analysis of the exoproteome revealed secretion of about 70 proteins with predicted secretion signals. In addition, selected production-relevant genome features such as restriction modification systems and NRPS clusters of B. pumilus Jo2 are discussed.}, language = {en} } @article{HandtkeSchroeterJuergenetal.2014, author = {Handtke, Stefan and Schroeter, Rebecca and J{\"u}rgen, Britta and Methling, Karen and Schl{\"u}ter, Rabea and Albrecht, Dirk and Hijum, Sacha A. F. T. van and Bongaerts, Johannes and Maurer, Karl-Heinz and Lalk, Michael and Schweder, Thomas and Hecker, Michael and Voigt, Birgit}, title = {Bacillus pumilus reveals a remarkably high resistance to hydrogen peroxide provoked oxidative stress}, series = {PLOS one}, volume = {9}, journal = {PLOS one}, number = {1}, publisher = {PLOS}, address = {San Francisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0085625}, pages = {e85625}, year = {2014}, abstract = {Bacillus pumilus is characterized by a higher oxidative stress resistance than other comparable industrially relevant Bacilli such as B. subtilis or B. licheniformis. In this study the response of B. pumilus to oxidative stress was investigated during a treatment with high concentrations of hydrogen peroxide at the proteome, transcriptome and metabolome level. Genes/proteins belonging to regulons, which are known to have important functions in the oxidative stress response of other organisms, were found to be upregulated, such as the Fur, Spx, SOS or CtsR regulon. Strikingly, parts of the fundamental PerR regulon responding to peroxide stress in B. subtilis are not encoded in the B. pumilus genome. Thus, B. pumilus misses the catalase KatA, the DNA-protection protein MrgA or the alkyl hydroperoxide reductase AhpCF. Data of this study suggests that the catalase KatX2 takes over the function of the missing KatA in the oxidative stress response of B. pumilus. The genome-wide expression analysis revealed an induction of bacillithiol (Cys-GlcN-malate, BSH) relevant genes. An analysis of the intracellular metabolites detected high intracellular levels of this protective metabolite, which indicates the importance of bacillithiol in the peroxide stress resistance of B. pumilus.}, language = {en} } @article{HalbachScheer2000, author = {Halbach, Thorsten and Scheer, Nico}, title = {Transcriptional activation by the PHD finger is inhibited through an adjacent leucine zipper that binds 14-3-3 proteins}, series = {Nucleic Acids Research}, volume = {28}, journal = {Nucleic Acids Research}, number = {18}, issn = {1362-4962}, doi = {10.1093/nar/28.18.3542}, pages = {3542 -- 3550}, year = {2000}, language = {en} } @article{HagerHentschkeHojdisetal.2015, author = {Hager, Jonathan and Hentschke, Reinhard and Hojdis, Nils and Karimi-Varzaneh, Hossein Ali}, title = {Computer Simulation of Particle-Particle Interaction in a Model Polymer Nanocomposite}, series = {Macromolecules}, volume = {48}, journal = {Macromolecules}, number = {24}, issn = {1520-5835}, doi = {10.1021/acs.macromol.5b01864}, pages = {9039 -- 9049}, year = {2015}, language = {en} } @article{HafidiElHatkaSchmitzetal.2024, author = {Hafidi, Youssef and El Hatka, Hicham and Schmitz, Dominik and Krauss, Manuel and Pettrak, J{\"u}rgen and Biel, Markus and Ittobane, Najim}, title = {Sustainable soil additives for water and micronutrient supply: swelling and chelating properties of polyaspartic acid hydrogels utilizing newly developed crosslinkers}, series = {Gels}, volume = {10}, journal = {Gels}, number = {3}, publisher = {MDPI}, address = {Basel}, issn = {2310-2861}, doi = {10.3390/gels10030170}, pages = {Artikel 170}, year = {2024}, abstract = {Drought and water shortage are serious problems in many arid and semi-arid regions. This problem is getting worse and even continues in temperate climatic regions due to climate change. To address this problem, the use of biodegradable hydrogels is increasingly important for the application as water-retaining additives in soil. Furthermore, efficient (micro-)nutrient supply can be provided by the use of tailored hydrogels. Biodegradable polyaspartic acid (PASP) hydrogels with different available (1,6-hexamethylene diamine (HMD) and L-lysine (LYS)) and newly developed crosslinkers based on diesters of glycine (GLY) and (di-)ethylene glycol (DEG and EG, respectively) were synthesized and characterized using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) and regarding their swelling properties (kinetic, absorbency under load (AUL)) as well as biodegradability of PASP hydrogel. Copper (II) and zinc (II), respectively, were loaded as micronutrients in two different approaches: in situ with crosslinking and subsequent loading of prepared hydrogels. The results showed successful syntheses of di-glycine-ester-based crosslinkers. Hydrogels with good water-absorbing properties were formed. Moreover, the developed crosslinking agents in combination with the specific reaction conditions resulted in higher water absorbency with increased crosslinker content used in synthesis (10\% vs. 20\%). The prepared hydrogels are candidates for water-storing soil additives due to the biodegradability of PASP, which is shown in an exemple. The incorporation of Cu(II) and Zn(II) ions can provide these micronutrients for plant growth.}, language = {en} } @article{HaegerProbstJaegeretal.2023, author = {Haeger, Gerrit and Probst, Johanna and Jaeger, Karl-Erich and Bongaerts, Johannes and Siegert, Petra}, title = {Novel aminoacylases from Streptomyces griseus DSM 40236 and their recombinant production in Streptomyces lividans}, series = {FEBS Open Bio}, volume = {13}, journal = {FEBS Open Bio}, number = {12}, publisher = {Wiley}, address = {Hoboken, NJ}, issn = {2211-5463}, doi = {10.1002/2211-5463.13723}, pages = {2224 -- 2238}, year = {2023}, abstract = {Amino acid-based surfactants are valuable compounds for cosmetic formulations. The chemical synthesis of acyl-amino acids is conventionally performed by the Schotten-Baumann reaction using fatty acyl chlorides, but aminoacylases have also been investigated for use in biocatalytic synthesis with free fatty acids. Aminoacylases and their properties are diverse; they belong to different peptidase families and show differences in substrate specificity and biocatalytic potential. Bacterial aminoacylases capable of synthesis have been isolated from Burkholderia, Mycolicibacterium, and Streptomyces. Although several proteases and peptidases from S. griseus have been described, no aminoacylases from this species have been identified yet. In this study, we investigated two novel enzymes produced by S. griseus DSM 40236ᵀ . We identified and cloned the respective genes and recombinantly expressed an α-aminoacylase (EC 3.5.1.14), designated SgAA, and an ε-lysine acylase (EC 3.5.1.17), designated SgELA, in S. lividans TK23. The purified aminoacylase SgAA was biochemically characterized, focusing on its hydrolytic activity to determine temperature- and pH optima and stabilities. The aminoacylase could hydrolyze various acetyl-amino acids at the Nα -position with a broad specificity regarding the sidechain. Substrates with longer acyl chains, like lauroyl-amino acids, were hydrolyzed to a lesser extent. Purified aminoacylase SgELA specific for the hydrolysis of Nε -acetyl-L-lysine was unstable and lost its enzymatic activity upon storage for a longer period but could initially be characterized. The pH optimum of SgELA was pH 8.0. While synthesis of acyl-amino acids was not observed with SgELA, SgAA catalyzed the synthesis of lauroyl-methionine.}, language = {en} } @article{HaegerGrankinWagner2023, author = {Haeger, Gerrit and Grankin, Alina and Wagner, Michaela}, title = {Construction of an Aspergillus oryzae triple amylase deletion mutant as a chassis to evaluate industrially relevant amylases using multiplex CRISPR/Cas9 editing technology}, series = {Applied Research}, journal = {Applied Research}, number = {Early View}, publisher = {Wiley-VCH}, issn = {2702-4288}, doi = {10.1002/appl.202200106}, pages = {1 -- 15}, year = {2023}, abstract = {Aspergillus oryzae is an industrially relevant organism for the secretory production of heterologous enzymes, especially amylases. The activities of potential heterologous amylases, however, cannot be quantified directly from the supernatant due to the high background activity of native α-amylase. This activity is caused by the gene products of amyA, amyB, and amyC. In this study, an in vitro CRISPR/Cas9 system was established in A. oryzae to delete these genes simultaneously. First, pyrG of A. oryzae NSAR1 was mutated by exploiting NHEJ to generate a counter-selection marker. Next, all amylase genes were deleted simultaneously by co-transforming a repair template carrying pyrG of Aspergillus nidulans and flanking sequences of amylase gene loci. The rate of obtained triple knock-outs was 47\%. We showed that triple knockouts do not retain any amylase activity in the supernatant. The established in vitro CRISPR/Cas9 system was used to achieve sequence-specific knock-in of target genes. The system was intended to incorporate a single copy of the gene of interest into the desired host for the development of screening methods. Therefore, an integration cassette for the heterologous Fpi amylase was designed to specifically target the amyB locus. The site-specific integration rate of the plasmid was 78\%, with exceptional additional integrations. Integration frequency was assessed via qPCR and directly correlated with heterologous amylase activity. Hence, we could compare the efficiency between two different signal peptides. In summary, we present a strategy to exploit CRISPR/Cas9 for gene mutation, multiplex knock-out, and the targeted knock-in of an expression cassette in A. oryzae. Our system provides straightforward strain engineering and paves the way for development of fungal screening systems.}, language = {en} } @article{HaegerBongaertsSiegert2022, author = {Haeger, Gerrit and Bongaerts, Johannes and Siegert, Petra}, title = {A convenient ninhydrin assay in 96-well format for amino acid-releasing enzymes using an air-stable reagent}, series = {Analytical Biochemistry}, journal = {Analytical Biochemistry}, number = {624}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1096-0309}, doi = {10.1016/j.ab.2022.114819}, pages = {Artikel 114819}, year = {2022}, abstract = {An improved and convenient ninhydrin assay for aminoacylase activity measurements was developed using the commercial EZ Nin™ reagent. Alternative reagents from literature were also evaluated and compared. The addition of DMSO to the reagent enhanced the solubility of Ruhemann's purple (RP). Furthermore, we found that the use of a basic, aqueous buffer enhances stability of RP. An acidic protocol for the quantification of lysine was developed by addition of glacial acetic acid. The assay allows for parallel processing in a 96-well format with measurements microtiter plates.}, language = {en} } @article{GuoMiyamotoWagneretal.2014, author = {Guo, Yuanyuan and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo}, title = {Theoretical study and simulation of light-addressable potentiometric sensors}, series = {Physica status solidi (A) : applications and materials}, volume = {211}, journal = {Physica status solidi (A) : applications and materials}, number = {6}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0031-8965}, doi = {10.1002/pssa.201330354}, pages = {1467 -- 1472}, year = {2014}, abstract = {The light-addressable potentiometric sensor (LAPS) is a semiconductor-based potentiometric sensor using a light probe with an ability of detecting the concentration of biochemical species in a spatially resolved manner. As an important biomedical sensor, research has been conducted to improve its performance, for instance, to realize high-speed measurement. In this work, the idea of facilitating the device-level simulation, instead of using an equivalent-circuit model, is presented for detailed analysis and optimization of the performance of the LAPS. Both carrier distribution and photocurrent response have been simulated to provide new insight into both amplitude-mode and phase-mode operations of the LAPS. Various device parameters can be examined to effectively design and optimize the LAPS structures and setups for enhanced performance.}, language = {en} } @article{GrafSteinhofLotzetal.2009, author = {Graf, Alain-Michel and Steinhof, Rafael and Lotz, Martin and Tippk{\"o}tter, Nils and Kasper, Cornelia and Beutel, Sascha and Ulber, Roland}, title = {Downstream-Processing mit Membranadsorbern zur Isolierung nativer Proteinfraktionen aus Kartoffelfruchtwasser}, series = {Chemie Ingenieur Technik}, volume = {81}, journal = {Chemie Ingenieur Technik}, number = {3}, publisher = {Wiley}, address = {Weinheim}, doi = {10.1002/cite.200800139}, pages = {267 -- 274}, year = {2009}, abstract = {Bei der St{\"a}rkeproduktion entstehendes Kartoffelfruchtwasser besitzt mit 2 - 3 \% einen hohen Anteil an ern{\"a}hrungsphysiologisch interessanten Proteinen. Die industrielle Gewinnung dieser Proteinfracht liefert jedoch lediglich ein minderwertiges, denaturiertes Produkt. Mit Hilfe der Membranadsorber-Technologie lassen sich aus Kartoffelfruchtwasser unter milden Reaktionsbedingungen native bioaktive Proteinfraktionen gewinnen. Geeignete Trennbedingungen wurden im Labormaßstab entwickelt und in den Technikumsmaßstab {\"u}bertragen. An Anionenaustauscher-Membranadsorbern mit einer Membranfl{\"a}che von 10 000 cm2 wurde eine Patatinhaltige Fraktion (44 kDa) mit Bindungskapazit{\"a}ten von 0,37 mg/cm2 isoliert. Eine niedermolekulare Proteinfraktion mit Protease-Inhibitoren konnte durch Kationenaustauscher-Membranadsorber mit Bindungskapazit{\"a}ten von 1,00 mg/cm2 gewonnen werden. Sie ist f{\"u}r verschiedenste Applikationen in der pharmazeutischen, kosmetischen und der Nahrungsmittelindustrie interessant z. B. f{\"u}r Appetitz{\"u}gler oder muskelaufbauende Proteinpr{\"a}parate. Der Aufreinigung der nativen Proteinfraktionen durch Ultra-/Diafiltration schließt sich die Konfektionierung durch Spr{\"u}htrocknung an. Die bioanalytische Charakterisierung der Produkte belegt die Reinheit und die enzymatische Aktivit{\"a}t sowie die Abreicherung von St{\"o}rkomponenten wie Glykoalkaloide und Polyphenoloxidasen.}, language = {de} } @article{GoetzeBaerWinkelmannetal.2005, author = {Goetze, Sandra and Baer, Alexandra and Winkelmann, Silke and Nehlsen, Kristina and Seibler, Jost and Maass, Karin and Bode, J{\"u}rgen}, title = {Performance of genomic bordering elements at predefined genomic loci}, series = {Molecular and Cellular Biology}, volume = {25}, journal = {Molecular and Cellular Biology}, number = {6}, issn = {1098-5549}, doi = {10.1128/MCB.25.6.2260-2272.2005}, pages = {2260 -- 2272}, year = {2005}, language = {en} } @article{GlaserLubitzLovelandetal.2009, author = {Glaser, Stefan and Lubitz, Sandra and Loveland, Kate L. and Ohbo, Kazu and Robb, Lorraine and Schwenk, Frieder and Seibler, Jost and Roellig, Daniela and Kranz, Andrea and Anastassiadis, Konstantinos and Stewart, A. Francis}, title = {The histone 3 lysine 4 methyltransferase, Mll2, is only required briefly in development and spermatogenesis}, series = {Epigenetics \& Chromatin}, volume = {2}, journal = {Epigenetics \& Chromatin}, number = {5}, issn = {1756-8935}, doi = {10.1186/1756-8935-2-5}, pages = {1 -- 16}, year = {2009}, language = {en} } @article{GielenWolfBerndtetal.1979, author = {Gielen, Hans-G{\"u}nther and Wolf, G{\"u}nter and Berndt, Heinz and Zahn, Helmut}, title = {Synthese der Fragmente A1-8, A9-15 und A16-21 der Schafinsulin-A-Kette unter Verwendung des S-tert-Butylmercaptorestes als Thiolschutzgruppe}, series = {Hoppe-Seyler's Zeitschrift f{\"u}r physiologische Chemie}, volume = {360}, journal = {Hoppe-Seyler's Zeitschrift f{\"u}r physiologische Chemie}, number = {2}, issn = {1437-4315}, doi = {10.1515/bchm2.1979.360.2.1535}, pages = {1535 -- 1548}, year = {1979}, language = {de} }