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Now showing items 21-40 of 68

Feasibility Of Ceramic Ultra- And Nanofiltration Membranes For Removal Of Endotoxins

Czermak, Peter; Ebrahimi, Mehrdad; Hackel, Rene; Catapano, Gerardo (Filtech Exhibitions Germany, 2008)

The removal of endotoxins, a potential contaminant of dialysis water and dialysate, is a very difficult task. The endotoxin removal capacity of commercial ceramic membranes with a nominal molecular weight cut-off of < ...
Feasibility Of Using Ceramic Micro-, Ultra- And Nanofiltration Membranes For Efficient Treatment Of Produced Water

Czermak, Peter; Ebrahimi, Mehrdad; Shams-Ashaghi, Kikavous; Engel, Larisa; Mund, Peter (Filtech Exhibitions Germany, 2008)

Generally, the production of crude oil and natural gas brings to the surface fossil water, termed “produced water.” By far the largest by-product or waste stream by volume associated with oil and gas extraction, this ...
Growth mechanisms and defect structures of B[subscript 12]As[subscript 2] epilayers grown on 4H-SiC substrates

Zhang, Yu; Chen, Hui; Dudley, Michael; Zhang, Yi; Edgar, J. H.; Gong, Yinyan; Bakalova, Silvia; Kuball, Martin; Zhang, Lihua; Su, Dong; Zhu, Yimei (2012)

Epitaxial growth of icosahedral B[subscript 12]As[subscript 2] on c-plane 4H-SiC substrates has been analyzed. On on-axis c-plane 4H-SiC substrates, Synchrotron white beam x-ray topography (SWBXT) revealed the presence of ...
hMSC production in disposable bioreactors with regards to GMP and PAT

Cierpka, Katharina; Elseberg, Christiane L.; Niss, Knut; Kassem, Moustapha; Salzig, Denise; Czermak, Peter (2013)

Reactor concepts for human mesenchymal stem cell (hMSC) production are introduced. Thereby, special interest is laid on the realization of these concepts as disposables fulfilling the GMP and PAT requirements. The specialty ...
HVPE of Scandium Nitride on 6H-SiC(0001)

Edgar, J. H.; Bohnen, T.; Hageman, P. R. (2008)

The epitaxy of scandium nitride deposited by hydride vapor phase epitaxy on 6HSiC( 0001) substrates is reported. The structure and composition of the deposited films were dependent on both the scandium metal source and ...
Immobilization of Candida antarctica Lipase B on Fumed Silica

Cruz, Juan C.; Pfromm, Peter H.; Rezac, Mary E. (2009)

Enzymes are usually immobilized on solid supports or solubilized when they are to be used in organic solvents with poor enzyme solubility. We have reported previously on a novel immobilization method for s. Carlsberg on ...
Immobilization of ß-Galactosidase in Adsorptive Membranes for the Continuous Production of Galacto-Oligosaccharides from Lactose

Engel, Larisa; Schneider, Philipp; Ebrahimi, Mehrdad; Czermak, Peter (2007)

A method for immobilization of ß-galactosidase from Kluyveromyces lactis on an adsorptive membrane for the continuous synthesis of galacto-oligosaccharides from lactose was carried out. The immobilization was performed at ...
Influence of porcine intervertebral disc matrix on stem cell differentiation

Salzig, Denise; Schmiermund, Alexandra; Gebauer, Elke; Fuchsbauer, Hans-Lothar; Czermak, Peter (2011)

For back disorders, cell therapy is one approach for a real regeneration of a degenerated nucleus pulposus. Human mesenchymal stem cells (hMSC) could be differentiated into nucleus pulposus (NP)-like cells and used for ...
Intervertebral disc regeneration: Influence of growth factors on differentiation of human mesenchymal stem cells (hMSC)

Ehlicke, F.; Freimark, D.; Heil, B.; Dorresteijn, A.; Czermak, Peter (Wichtig Editore, 2010)

Introduction: One common cause of disability in modern society is low back pain. The main reason for this pain is the degeneration of the intervertebral disc (IVD), particular of the nucleus pulposus (NP). For an early ...
Investigations on the Use of Different Ceramic Membranes For Efficient Oil-Field Produced Water Treatment

Ebrahimi, Mehrdad; Willershausen, Daniel; Shams-Ashaghi, Kikavous; Engel, Larisa; Placido, Laura; Mund, Peter; Bolduan, Peter; Czermak, Peter (2010)

Efficient performance of the combination of treatment processes for oilfield produced water generated from oil tank dewatering was investigated in the study presented below. By-produced wastewater is generated in significant ...
An ionicity rationale to design solid phase metal nitride reactants for solar ammonia production

Michalsky, Ronald; Pfromm, Peter H. (2012)

Ammonia is an important fertilizer component and could be used as a convenient hydrogen carrier. This work studies a solar thermochemical reaction cycle that separates the reductive N[subscript 2] cleavage from the ...
Key parameters of measles virus production for oncolytic virotherapy

Weiss, K.; Salzig, D.; Mühlebach, M. D.; Cichutek, K.; Pörtner, R.; Czermak, Peter (2012)

Attenuated measles virus has revealed selective tumor cell killing and is currently tested in clinical trials for the therapy of cancer patients. The amount of infectious particles per dose needed for oncolytic therapy can ...
Laboratory scale electrostatically assisted wet scrubber for controlling dust in livestock buidlings

Almuhanna, E. A.; Maghirang, R. G.; Murphy, J. P.; Erickson, L. E. (American society of agricultural and biological engineers, 2009)

A prototype electrostatically assisted particulate wet scrubber (EPWS) for controlling dust in livestock buildings was developed and tested under laboratory and field conditions. Under laboratory conditions, the EPWS with ...
Mathematical modeling of diafiltration

Kovacs, Z.; Fikar, M.; Czermak, Peter (2009)

The main objective of this study is to provide a general mathematical model in a compact form for batch diafiltration techniques. The presented mathematical framework gives a rich representation of diafiltration processes ...
Mechanism for Improved Quality B[subscript]12As[subscript]2 Epitaxial Films on (0001) 4H-SiC Substrates Offcut towards [1-100]

Zhang, Yu; Chen, Hui; Dudley, Michael; Zhang, Yi; Edgar, J. H.; Gong, Yinyan; Bakalova, Silvia; Kuball, Martin; Zhang, Lihua; Su, Dong; Kisslinger, Kim; Zhu, Yimei (Materials Research Society, 2010)

Epitaxial growth of icosahedral boron arsenide (B[subscript]12As[subscript]2, abbreviated here as IBA) on 4HSiC substrates intentionally misoriented from (0001) towards [1-100] is shown to eliminate rotational twinning. ...
Membrane-assisted enzymatic production of galactosyl-oligosaccharides from lactose in a continuous process

Czermak, Peter; Ebrahimi, M.; Grau, K.; Netz, S.; Sawatzki, G.; Pfromm, Peter H. (2004)

Functional foods such as oligosaccharides have attained significant acceptance in Japan and are attracting interest elsewhere. Beneficial physiological properties are attributed to oligosaccharides. Here, we describe the ...
Membrane-Chromatography-Reactor-System for the Continuous Synthesis of Galactosyl-Oligosaccharides

Engel, Larisa; Ebrahimi, Mehrdad; Czermak, Peter (2008)

Galactosyl-oligosaccharides (GOS) are non-digestible oligosaccharides which are qualified as functional foods. GOS are enzymatically synthesized from lactose by transgalactosylation catalyzed by the enzyme β-galactosidase. ...
The minimum water consumption of ethanol production via biomass fermentation

Pfromm, Peter H. (2008)

The water consumption of fermentation-based bio-ethanol production has recently begun to attract public attention. We calculate a minimum consumption of 2.85 gal water/gal of ethanol produced assuming zero liquid discharge ...
Model of inactivation of Campylobacter jejuni in scalding of chicken process

Osiriphun, Sukhuntha; Tuitemwong, Pravate; Koetsinchai, Woranut; Tuitemwong, Kooranaee; Erickson, Larry E. (2012)

The purpose of this study was to develop a model of inactivation of Campylobacter jejuni in industrial scalding of chickens. Models can be used as a guide for broiler slaughterhouse operations for reducing levels of C. ...
Modeling of diafiltration processes for demineralization of acid whey: an empirical approach

Román, A.; Vatai, Gy.; Ittzés, A.; Kovács, Z.; Czermak, Peter (2012)

In this paper, a mathematical model is provided to describe the dynamics of membrane diafiltration processes for desalting acid whey. A rich representation of the separation process is given due to the employment of ...

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