TY - CHAP A1 - Peter, Steffen A1 - Vater, Frank A1 - Langendörfer, Peter T1 - Sicherheits-Engineering am Beispiel von drahtlos angebundenen Sensor/Aktor-Systemen in der Automatisierungstechnik Y1 - 2009 ER - TY - CHAP A1 - Vater, Frank A1 - Peter, Steffen A1 - Langendörfer, Peter T1 - An On-Chip Security Monitoring Solution for System Clock for Low Cost Devices Y1 - 2008 UR - https://www.researchgate.net/publication/242086470_An_On-chip_Security_Monitoring_Solution_For_System_Clock_For_Low_Cost_Devices ER - TY - PAT A1 - Peter, Steffen A1 - Methfessel, Michael A1 - Vater, Frank A1 - Langendörfer, Peter T1 - Reduktion von Seiten-Kanal-Informationen durch interagierende Krypto-Blocks Y1 - 2008 ER - TY - PAT A1 - Peter, Steffen A1 - Methfessel, Michael A1 - Langendörfer, Peter A1 - Vater, Frank T1 - Reduktion von Seiten-Kanal-Informationen durch interagierende Krypto-Blocks Y1 - 2007 ER - TY - GEN A1 - Allertz, Peter J. A1 - Berger, Steffen A1 - Sellenk, Grit A1 - Dittmer, Christin A1 - Dietze, Marco A1 - Stahmann, Klaus-Peter A1 - Salchert, Katrin T1 - Approaching Immobilization of Enzymes onto Open Porous Basotect® T2 - Catalysts N2 - For the first time, commercial macroporous melamine formaldehyde foam Basotect® (BT) was used as a basic carrier material for both adsorptive and covalent enzyme immobilization. In order to access inherent amino groups, the Basotect® surface was pretreated with hydrochloric acid. The resulting material revealed 6 nmol of superficial amino groups per milligram Basotect®. Different optimized strategies for tethering the laccase from Trametes versicolor and the lipase from Thermomyces lanuginosus onto the pre-treated Basotect® surface were studied. Particularly, for covalent immobilization, two different strategies were pursued: lipase was tethered via a cross-linking method using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide, and laccase was bound after functionalizing Basotect® with hydrophilic copolymer poly(ethylene-alt-maleic anhydride) (PEMA). Prior to laccase immobilization, the PEMA coating of Basotect® was verified by ATR-FTIR analysis. Subsequent quantification of available high-reactive PEMA anhydride moieties revealed an amount of 1028 ± 73 nmol per mg Basotect®. The surface-bound enzyme amounts were quantified as 4.1–5.8 μg per mg Basotect®. A theoretical surface-covered enzyme mass for the ideal case that an enzyme monolayer was immobilized onto the Basotect® surface was calculated and compared to the amount of adsorptive and covalently bound enzymes before and after treatment with SDS. Furthermore, the enzyme activities were determined for the different immobilization approaches, and the stability during storage over time and against sodium dodecyl sulfate treatment was monitored. Additionally, PEMA-BT-bound laccase was tested for the elimination of anthropogenic micropollutant bisphenol A from contaminated water in a cost-effective and environmentally-friendly way and resulted in a degradation rate higher than 80%. KW - Basotect® KW - Enzyme immobilization KW - Laccase KW - Lipase KW - PEMA KW - EDC KW - Bisphenol A Y1 - 2017 U6 - https://doi.org/10.3390/catal7120359 SN - 2073-4344 VL - 7 IS - 12 ER - TY - PAT A1 - Vater, Frank A1 - Jagdhold, Ulrich A1 - Peter, Steffen A1 - Langendörfer, Peter T1 - Taktüberwachungsschaltung Y1 - 2007 ER - TY - PAT A1 - Vater, Frank A1 - Peter, Steffen A1 - Jagdhold, Ulrich A1 - Langendörfer, Peter T1 - Erweiterter Clock Watchdog Y1 - 2007 ER - TY - PAT A1 - Vater, Frank A1 - Peter, Steffen A1 - Jagdhold, Ulrich A1 - Langendörfer, Peter T1 - Verschlüsselungseinheit Y1 - 2006 UR - https://patents.google.com/patent/DE102006062649A1/de ER - TY - GEN A1 - Langendörfer, Peter A1 - Piotrowski, Krzysztof A1 - Peter, Steffen A1 - Lehmann, Martin T1 - Crosslayer Firewall Interaction as a Means to Provide Effective and Efficient Protection at Mobile Devices Y1 - 2007 ER - TY - JOUR A1 - Vater, Frank A1 - Peter, Steffen A1 - Langendörfer, Peter T1 - Combinatorial Logic Circuitry as Means to Protect Low Cost Devices Against Side Channel Attacks Y1 - 2007 UR - https://link.springer.com/chapter/10.1007/978-3-540-72354-7_20 ER - TY - CHAP A1 - Rogaß, Harald A1 - Rudtsch, Steffen A1 - Strangfeld, Peter A1 - Fischer, Ulrich T1 - Thermal flux measurements on moist porous concrete T2 - Thermal conductivity 23, proceedings of the Twenty-Third International Thermal Conductivity Conference, October 29 to November 1, 1995, Nashville, Tennessee Y1 - 1995 SN - 1-566-76477-7 PB - Lancaster, Pa. [u.a.] CY - Technomic Publ. ER - TY - GEN A1 - Krimmling, Jana A1 - Peter, Steffen A1 - Mahlig, Matthias T1 - Test einer Bluetooth-Funkstrecke für die Prozessautomatisierung Y1 - 2010 ER - TY - GEN A1 - Ortmann, Steffen A1 - Maaser, Michael A1 - Langendörfer, Peter T1 - Self-Adapting Event Configuration in Ubiquitous Wireless Sensor Networks Y1 - 2010 ER - TY - CHAP A1 - Ortmann, Steffen A1 - Langendörfer, Peter T1 - Enhancing Reliability of Sensor Networks by Fine Tuning Their Event Observation Behavior Y1 - 2008 ER - TY - CHAP A1 - Maaser, Michael A1 - Ortmann, Steffen A1 - Langendörfer, Peter T1 - The Privacy Advocate: Assertion of Privacy by Personalised Contracts Y1 - 2008 ER - TY - CHAP A1 - Maaser, Michael A1 - Ortmann, Steffen A1 - Langendörfer, Peter T1 - The Privacy Advocate (PrivAd): A Framework for Negotiating Individualized Privacy Contracts Y1 - 2007 ER - TY - CHAP A1 - Ortmann, Steffen A1 - Maaser, Michael A1 - Langendörfer, Peter T1 - High Level Definition of Event-based Applications for Pervasive Systems Y1 - 2012 ER - TY - CHAP A1 - Ortmann, Steffen A1 - Langendörfer, Peter T1 - Social Networking and Privacy, a Contradiction? Y1 - 2012 ER - TY - GEN A1 - Klose, Markus A1 - Reinhold, Romy A1 - Logsch, Florian A1 - Wolke, Florian A1 - Linnemann, Julia A1 - Stoeck, Ulrich A1 - Oswald, Steffen A1 - Uhlemann, Martin A1 - Ballach, Juan A1 - Markowski, Jens A1 - Ay, Peter A1 - Giebeler, Lars T1 - Softwood lignin as a sustainable feedstock for porous carbons as active material for supercapacitors using an ionic liquid electrolyte T2 - ACS Sustainable Chemistry & Engineering KW - porous carbons KW - lignin KW - supercapacitors Y1 - 2017 VL - 5 IS - 5 SP - 4095 EP - 4102 ER - TY - GEN A1 - Jung, C. G. H. A1 - Nghinaunye, Theopolina A1 - Waldeck, Peter A1 - Braune, Steffen A1 - Petrick, Ingolf A1 - Küpper, Jan-Heiner A1 - Jung, Friedrich T1 - Decarbonization of Arthrospira platensis production by using atmospheric CO2 as an exclusive carbon source: proof of principle T2 - International Journal of Environmental Science and Technology N2 - There is an urgent need to develop technologies for removing CO2 from the atmosphere to combat climate change. Microalgae and cyanobacteria, such as Arthrospira platensis (AP), have shown promise due to their high photoautotrophic biomass production. Conventional AP culture media are supplemented with high concentrations of NaHCO3 since AP utilizes as a carbon source. These culture conditions result in significant amounts of CO2 escaping into the atmosphere, instead of being sequestered during cultivation. Here, we investigated whether ambient air (0.042% CO2) can be used for growing AP in a culture medium lacking a fossil-based carbon source. AP was cultured in 2 L glass bioreactors containing: (1) Zarrouk medium with 16.8 g/L NaHCO3 and aeration with 0.236 vvm air with 2% CO2 (“NaHCO3/CO2-based”) to compensate carbon loss due to CO2 outgassing, and (2) Zarrouk medium without NaHCO3 and a gas flow with ambient air (0.926 vvm) as the only carbon source (“air-based”). The air-based production resulted in the biofixation of 3.78 gCO2/L during the linear growth phase. With NaHCO3/CO2-based production, a comparable amount of 3.42 gCO2/L was obtained while 659.12 g of CO2 was released into the atmosphere. Total protein, phycocyanin, chlorophyll-a, and carotenoids were present in similar or increased amounts in AP produced by the air-based method. We concluded that cultivation of AP with Zarrouk medium lacking NaHCO3 but using ambient air with atmospheric CO2 as the only carbon source is possible without reducing productivity. These results improve our understanding of how atmospheric CO2 can be reduced by culturing AP. KW - Arthrospira platensis KW - Atmospheric CO2 KW - Biomass production KW - Climate change KW - Carbon capturing KW - Decarbonization Y1 - 2023 UR - https://link.springer.com/article/10.1007/s13762-023-05215-x#citeas U6 - https://doi.org/10.1007/s13762-023-05215-x SN - 1735-2630 ER -