TY - JOUR A1 - Baumann, Marcus A1 - Thomas, D. A1 - Gleitz, M. T1 - Efficiency of carbon assimilation and photoacclimation in a small unicellular Chaetoceros species from the Weddel Sea (Antarctica): Influence of temperature and irridiance / Thomas, D. ; Baumann, M.E.M. ; Gleitz, M. JF - Journal of Experimental Marine Biology and Ecology. 157 (1992), H. 2 Y1 - 1992 SN - 0022-0981 SP - 195 EP - 209 ER - TY - JOUR A1 - Baumann, Marcus A1 - Tillmann, U. A1 - Aletsee, L. T1 - Distribution of Carbon Among Photosynthetic End Products in the Bloom-Forming Arctic Diatom Thalassiosira antarctica COMBER / Tillmann, U. ; Baumann, M.E.M. ; Aletsee, L. JF - Polar Biology. 10 (1989), H. 3 Y1 - 1989 SN - 0722-4060 SP - 231 EP - 238 ER - TY - CHAP A1 - Brandini, Frederico P. A1 - Baumann, Marcus T1 - The potential role of melted 'brown ice' as sources of chelators and ammonia to the surface waters of the Weddell Sea, Antarctica T2 - Proceedings of the NIPR Symposium on Polar Biology : 10 Y1 - 1997 SN - 0914-563X SP - 1 EP - 13 CY - Tokyo ER - TY - JOUR A1 - Burkhardt, Klaus A1 - Schwarz, Sonja A1 - Pan, Chengrui A1 - Stelter, Felix A1 - Kotliar, Konstantin A1 - Eynatten, Maxilian von A1 - Sollinger, Daniel A1 - Lanzl, Ines A1 - Heemann, Uwe A1 - Baumann, Marcus T1 - Myeloid-related protein 8/14 complex describes microcirculatory alterations in patients with type 2 diabetes and nephropathy JF - Cardiovascular Diabetology Y1 - 2009 SN - 1475-2840 VL - 8 IS - 10 SP - 1 EP - 8 PB - - ER - TY - CHAP A1 - Groebel, Simone A1 - Werner, Frederik A1 - Jörres, Niklas A1 - Jansen, F. A1 - Kasper, Katharina A1 - Schiffels, Johannes A1 - Sprenger, B. A1 - Baumann, Marcus A1 - Schöning, Michael Josef A1 - Selmer, Thorsten T1 - Entwicklung einer Sensor-Überwachung für Biogasanlagen auf Basis von Prozessdaten einer Parallelanlage T2 - 10. Dresdner Sensor-Symposium : Dresden, 5. - 7. Dezember 2011 ; miniaturisierte analytische Verfahren, Hochtemperatur-Sensoren, Sensoren für Bioprozess- und Verfahrenstechnik, Sensoren für die Medizin, Chemische Verfahrenstechnik, Lebensmittelanalytik, innovative Sensorlösungen, Sensoren für die Wasserqualität, Selbstüberwachung / Gerald Gerlach ... (Hg.) N2 - Beim Ausbau nachhaltiger, regenerativer Energieversorgung hat die Umwandlung von organischer Biomasse in Biogas ein großes Potential. Der zugrundeliegende, komplexe biologische Prozess wird noch immer unzureichend verstanden und bedarf systematischer Untersuchungen der Prozessparameter, um einen hohen Ertrag bei guter Gasqualität zu ermöglichen. Die Fragestellungen zur Entschlüsselung des Prozesses sind sowohl verfahrenstechnischer als auch mikrobiologischer Natur. Aus mikrobiologischer Sicht ist die Kenntnis der tatsächlich beteiligten prozesstragenden Mikroorganismen von erheblicher Bedeutung, aus verfahrenstechnischer Sicht die Kenntnis der physikalischen und chemischen Faktoren, welche die mikrobiologischen Prozesse und kontrollieren. Im Zusammenspiel aller dieser Parameter wird die Biogasbildung befördert oder behindert, bis zum Abbruch des Prozesses. Eine mögliche Kontrollmethode ist die Messung der metabolischen Aktivität prozesstragender Organismen. Diese soll, beruhend auf fundierten Prozessdaten, gewonnen durch eine Parallelanlage, mit einem lichtadressierbaren potentiometrischen Sensor-System (LAPS) realisiert werden. Dieser Sensor ist in der Lage, pH-Wert-änderungen zu detektieren, die durch den Stoffwechsel der auf dem Chip immobilisierten Organismen hervorgerufen werden, um eine Online-Überwachung von Biogasanlagen zu ermöglichen. Y1 - 2011 SN - 978-3-942710-53-4 U6 - http://dx.doi.org/10.5162/10dss2011/4.3 N1 - Dresdner Beiträge zur Sensorik 43 ; Dresdner Sensor-Symposium ; 10 ; 2011 ; Dresden ; Forschungsgesellschaft für Messtechnik, Sensorik und Medizintechnik ; Zehntes Dresdner Sensor-Symposium ; Dresdner Sensor-Symposium ; (10 ; 2011.12.05-07 ; Dresden) SP - 81 EP - 84 PB - TUDpress CY - Dresden ER - TY - JOUR A1 - Huck, Christina A1 - Schiffels, Johannes A1 - Herrera, Cony N. A1 - Schelden, Maximilian A1 - Selmer, Thorsten A1 - Poghossian, Arshak A1 - Baumann, Marcus A1 - Wagner, Patrick A1 - Schöning, Michael Josef T1 - Metabolic responses of Escherichia coli upon glucose pulses captured by a capacitive field-effect sensor JF - Physica Status Solidi (A) N2 - 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. Y1 - 2013 U6 - http://dx.doi.org/10.1002/pssa.201200900 SN - 0031-8965 VL - 210 IS - 5 SP - 926 EP - 931 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Jahnke, J. A1 - Baumann, Marcus T1 - Differentiation between Phaeocystis pouchetii (Har.) Lagerheim and Phaeocystis globosa Scherffel JF - Hydrobiological bulletin Y1 - 1987 SN - 0165-1404 (Print); 1573-5125 (E-Journal) VL - Vol. 21 IS - Iss. 2 SP - 141 EP - 147 ER - TY - JOUR A1 - Kotliar, Konstantin A1 - Baumann, Marcus A1 - Vilser, Walthard A1 - Lanzl, Ines M. T1 - Pulse wave velocity in retinal arteries of healthy volunteers JF - British Journal of Ophthalmology (eBJO) Y1 - 2011 SN - 1468-2079 VL - 95 IS - 11 SP - 675 EP - 679 PB - BMJ Publ. Group CY - London ER - TY - JOUR A1 - Kotliar, Konstantin A1 - Lanzl, Ines M. A1 - Hanssen, Henner A1 - Eberhardt, Karla A1 - Vilser, Walthard A1 - Halle, Martin A1 - Heemann, Uwe A1 - Schmidt-Trucksäss, Arno A1 - Baumann, Marcus T1 - Does increased blood pressure rather than aging influence retinal pulse wave velocity? JF - Investigative Ophthalmology & Visual Science, IOVS N2 - Purpose: It was demonstrated previously that retinal pulse wave velocity (rPWV) as a measure of retinal arterial stiffness is increased in aged anamnestically healthy volunteers compared with young healthy subjects. Using novel methodology of rPWV assessment this finding was confirmed and investigated whether it might relate to the increased blood pressure usually accompanying the aging process, rather than to the aging itself. Methods: A total of 12 young 25.5-year-old (24.0–28.8) [median(1st quartile–3rd quartile)] and 12 senior 68.5-year-old (63.8–71.8) anamnestically healthy volunteers; and 12 senior 63.0-year-old (60.8–65.0) validated healthy volunteers and 12 young 33.0-year-old (29.5–35.0) hypertensive patients were examined. Time-dependent alterations of vessel diameter were assessed by the Dynamic Vessel Analyzer in a retinal artery of each subject. The data were filtered and processed using mathematical signal analysis and rPWVs were calculated. Results: rPWV amounted to 1200 (990-1470) RU (relative units)/s in the hypertensive group and to 1040 (700-2230) RU/s in anamnestically healthy seniors. These differed significantly from rPWVs in young healthy group (410 [280–500] RU/s) and in validated healthy seniors (400 [320–510] RU/s). rPWV associated with age and mean arterial pressure (MAP) in the pooled cohort excluded validated healthy seniors. In a regression model these associations remain when alternately adjusted for MAP and age. When including validated healthy seniors in the pooled cohort only association with MAP remains. Conclusions: Both aging (with not excluded cardiovascular risk factors) and mild hypertension are associated with elevated rPWV. rPWV increases to a similar extent both in young mildly hypertensive subjects and in aged anamnestically healthy persons. Healthy aging is not associated with increased rPWV. Y1 - 2012 U6 - http://dx.doi.org/10.1167/iovs.11-8815 SN - 0146-0404 VL - 53 IS - 4 SP - 2119 EP - 2126 PB - ARVO CY - Rockville, Md. ER - TY - CHAP A1 - Medlin, L. K. A1 - Barker, G. L. A. A1 - Baumann, Marcus A1 - Hayes, P. K. T1 - Molecular biology and systematics T2 - The Haptophyte Algae (Special volume / Systematics Association : 51) Y1 - 1994 SN - 0-19-857772-9 SP - 393 EP - 411 PB - Clarendon Press CY - Oxford ER -