Fak. 3 Prozesswissenschaften

1611 Items

Recent Submissions
Comparative genomics of the aconidial Aspergillus niger strain LDM3 predicts genes associated with its high protein secretion capacity

Sui, Yu-Fei ; Ouyang, Li-Ming ; Schütze, Tabea ; Cheng, Shu ; Meyer, Vera ; Zhuang, Ying-Ping (2020-02-03)

Aspergillus niger is widely used as a cell factory for homologous and heterologous protein production. As previous studies reported that reduced sporulation favors protein secretion in A. niger, in this study, we conducted a comparative genomic analysis of the non-sporulating industrially exploited A. niger strain LDM3 in China and the reference protein secretion strain CBS 513.88 to predict th...

Extracellular matrix- and pluripotent stem cell-based tissue engineering of the Kidney

Fischer, Iris (2020)

Complex, three-dimensional (3D) organ models are novel biotechnological tools for research on regeneration and disease mechanisms as well as drug development. An organ model of the kidney is urgently needed to break through decades of stagnation in the development of new treatment methods for patients with chronic kidney disease and to reduce the high failure rate of drugs in clinical tests due...

Risk assessment for internal spaces regarding aerosols loaded with virus

Kriegel, Martin ; Hartmann, Anne (2020-06)

Based on known equations a risk assessment for rooms with different sizes has been performed if an infected person has entered the room. Depending on the air change the maximum duration of stay until a critical limit of inhaled virus has been reached has been calculated. In specific situations the load is influenced by the ventilation effectiveness as well as the vitality of the virus.

Risikobewertung von Innenräumen zu virenbeladenen Aerosolen

Kriegel, Martin ; Hartmann, Anne (2020-06)

Aufbauend auf bekannten Gleichungen wird eine Risikobewertung with Räume unterschiedlicher Größe durchgeführt, wenn eine infizierte Person den Raum betritt. In Abhängigkeit vom Luftwechsel wird eine maximale Aufenthaltszeit bestimmt, bevor ein kritische Menge an Viren eingeatmet wird. In konkreten Situationen wird die Last zusätzlich noch von der Lüftungswirksamkeit und der Vitalität der Viren...

Specific adsorption sites and conditions derived by thermal decomposition of activated carbons and adsorbed carbamazepine

Dittmann, Daniel ; Eisentraut, Paul ; Goedecke, Caroline ; Wiesner, Yosri ; Jekel, Martin ; Ruhl, Aki Sebastian ; Braun, Ulrike (2020-04-21)

The adsorption of organic micropollutants onto activated carbon is a favourable solution for the treatment of drinking water and wastewater. However, these adsorption processes are not sufficiently understood to allow for the appropriate prediction of removal processes. In this study, thermogravimetric analysis, alongside evolved gas analysis, is proposed for the characterisation of micropollut...

Eine Marktübersicht der Blockchain in der Energiewirtschaft

Corusa, Andreas ; Predel, Johannes ; Schöne, Nikolas (2020-08)

Die Studie „Eine Marktübersicht der Blockchain in der Energiewirtschaft“ unterteilt die Blockchain-Technologie in technische Module und ordnet dabei vorhandene Blockchain-Lösungen anhand der entwickelten Methodik ein. Ausgangspunkt der Studie ist eine fundierte Marktanalyse über die derzeitige Nutzung der Blockchain in der Energiewirtschaft. Dabei ist die Studie ein wichtiger Ratgeber für die A...

Process model adaption for the autotrophic cultivation of Ralstonia eutropha mutant strains

Neddermeyer, Flavia (2020)

Bioprocesses, in which gases serve as substrates, have become popular in the past years, as they are used, for example, to upgrade industrial exhaust gases. In this thesis, first a regulatory concept for the autotrophic cultivation of the bacterium Ralstonia eutropha is presented. The focus lies on a model-based gas phase controller that works independently of the strain. It adjusts the gas com...

Hierarchical levels of organization of the Brazil nut mesocarp

Sonego, Marilia ; Fleck, Claudia ; Pessan, Luiz Antonio (2020-04-22)

Aiming to understand Nature´s strategies that inspire new composite materials, the hierarchical levels of organization of the Brazil nut (Bertholletia excelsa) mesocarp were investigated. Optical microscopy, scanning electron microscopy (SEM), microtomography (MicroCT) and small-angle X-ray scattering (SAXS) were used to deeply describe the cellular and fibrillary levels of organization. The me...

Aerosol emission is increased in professional singing

Mürbe, Dirk ; Fleischer, Mario ; Lange, Julia ; Rotheudt, Hansjörg ; Kriegel, Martin (2020-09)

In this study, emission rates of aerosols emitted by professional singers were measured with a laser particle counter under cleanroom conditions. The emission rates during singing varied between 753.4 and 6095.37 P/s. Emission rates for singing were compared with data for breathing and speaking. Significantly higher emission rates were found for singing. The growth rates between singing and spe...

Monitoring Parallel Robotic Cultivations with Online Multivariate Analysis

Hans, Sebastian ; Ulmer, Christian ; Narayanan, Harini ; Brautaset, Trygve ; Krausch, Niels ; Neubauer, Peter ; Schäffl, Irmgard ; Sokolov, Michael ; Cruz-Bournazou, Mariano Nicolas (2020-05-14)

In conditional microbial screening, a limited number of candidate strains are tested at different conditions searching for the optimal operation strategy in production (e.g., temperature and pH shifts, media composition as well as feeding and induction strategies). To achieve this, cultivation volumes of >10 mL and advanced control schemes are required to allow appropriate sampling and analyses...

Potential and Feasibility Study of Hybrid Wind−Hydroelectric Power System with Water-Pumping Storage: Jordan as a Case Study

Al-Addous, Mohammad ; Al Hmidan, Sahil ; Jaradat, Mustafa ; Alasis, Emil ; Barbana, Nesrine (2020-05-11)

Periodic daily fluctuating demand for energy and power is a perceptible phenomenon, resulting in some moments of low demand for power and energy related to the huge energy comes from renewable energy systems, and some moments of peak load demand. This phenomenon, when combined with the non-stationary operation of huge capacity of renewable energy systems, results in no stability of voltage and ...

Freeze Casting: From Low‐Dimensional Building Blocks to Aligned Porous Structures—A Review of Novel Materials, Methods, and Applications

Shao, Gaofeng ; Hanaor, Dorian A. H. ; Shen, Xiaodong ; Gurlo, Aleksander (2020-03-12)

Freeze casting, also known as ice templating, is a particularly versatile technique that has been applied extensively for the fabrication of well‐controlled biomimetic porous materials based on ceramics, metals, polymers, biomacromolecules, and carbon nanomaterials, endowing them with novel properties and broadening their applicability. The principles of different directional freeze‐casting pro...

Phosphonate Metal–Organic Frameworks: A Novel Family of Semiconductors

Siemensmeyer, Konrad ; Peeples, Craig A. ; Tholen, Patrik ; Schmitt, Franz‐Josef ; Çoşut, Bünyemin ; Hanna, Gabriel ; Yücesan, Gündoğ (2020-05-06)

Herein, the first semiconducting and magnetic phosphonate metal–organic framework (MOF), TUB75, is reported, which contains a 1D inorganic building unit composed of a zigzag chain of corner‐sharing copper dimers. The solid‐state UV–vis spectrum of TUB75 reveals the existence of a narrow bandgap of 1.4 eV, which agrees well with the density functional theory (DFT)‐calculated bandgap of 1.77 eV. ...

Effect of sprouting temperature on selected properties of wheat flour and direct expanded extrudates

Krapf, Julia ; Ding, Linda ; Brühan, Juliane ; Lorimer, Luisa ; Walther, Goeran ; Flöter, Eckhard (2020-01-12)

The effect of the sprouting temperature on wheat sprouting and on the properties of expanded extrudates produced from sprouted wheat flour was studied. Therefore, wheat was sprouted at five different temperatures and subsequently dried, milled, and the resulting flour was used to produce extrudates using a twin‐screw extruder. In order to understand the sprouting temperature effect, the degree ...

Numerical Investigations on Material Flow During Indirect Extrusion of Copper-Clad Aluminum Rods

Kuhnke, Stefan ; Sanabria, Vidal ; Gensch, Felix ; Nitschke, Renè ; Müller, Sören (2020-06-09)

In the extrusion of clad composite materials with different flow stresses are usually used. This causes an inhomogeneous material flow which can induce sleeve or core fracture. In the present study, the material flow during indirect extrusion of copper-clad aluminum (CCA) rods was analyzed by means of experimental and numerical investigations throughout the process. In order to provide material...

Quantification of Major Bacteria and Yeast Species in Kefir Consortia by Multiplex TaqMan qPCR

Nejati, Fatemeh ; Junne, Stefan ; Kurreck, Jens ; Neubauer, Peter (2020-06-16)

Kefir grains are complex microbial systems of several groups of microorganisms. The identification and quantification of the microbial composition of milk kefirs was described in several studies, which provided an insight into the microbial consortia in this complex ecosystem. Nevertheless, the current methods for identification and quantification are not appropriate for deeper studies on kefir...

Multi-stage ageing in an Al-Mg-Si alloy

Yang, Zi (2020)

Solute clustering and precipitation in Al-Mg-Si alloys have been extensively studied in the past decades oweing to an increasing importance of these alloys in industrial applications. However, many details are still not well understood, especially during multi-stage ageing. In this study, several aspects of multi-stage ageing in a commercial AA6014 alloy were systematically investigated, namely...

Erhöhung der Aerosolbildung beim professionellen Singen

Mürbe, Dirk ; Fleischer, Mario ; Lange, Julia ; Rotheudt, Hansjörg ; Kriegel, Martin (2020-08)

In dieser Studie werden mittels Partikelzähler gemessene Partikelquellstärken von emittierten Aerosolen beim Singen bei professionellen Sängerinnen und Sängern vorgestellt und mit publizierten Daten für das Atmen und Sprechen verglichen. In der untersuchten Kohorte von acht Probandinnen und Probanden liegen die Partikelquellstärken beim Singen zwischen 753.4 und 6093.14 P/s. Die Steigerungsfakt...

Effects of micropollutants on the Panke River microbial communities and degradation of selected pharmaceuticals by manganese-oxidizing bacteria

Nega, Marcella (2020)

Pharmaceuticals and other anthropogenic substances are detectable worldwide in trace concentrations in surface waters since they are only partially retained in wastewater treatment plants (WWTPs). In metropolitan areas, high consumption rates of pharmaceuticals can induce an increase of organic compounds in surface waters, and these biologically active compounds can be a burden to aquatic envir...

Improved oxidation resistance of high emissivity coatings on fibrous ceramic for reusable space systems

Shao, Gaofeng ; Lu, Yucao ; Hanaor, Dorian A. H. ; Cui, Sheng ; Jiao, Jian ; Shen, Xiaodong (2018-11-13)

To develop high emissivity coatings on fibrous ceramic substrates with improved thermal resistance for reusable space systems, WSi2–MoSi2–Si–SiB6-borosilicate glass coatings were prepared on fibrous ZrO2 by slurry dipping and subsequent high temperature rapid sintering. A coating with 20 wt% WSi2 and 50 wt% MoSi2 presents optimal thermal stability with only 10.06 mg/cm2 mass loss and 4.0% emiss...