Search results for: R. Brandenburg

Items from 1 to 20 out of 28 results

chapter

Investigation of an atmospheric pressure 2D-array of microdischarges in air using cross-correlation spectroscopy

G. Nayak, Y. Du, R. Brandenburg, P. J. Bruggeman

2016 IEEE International Conference on Plasma Science (ICOPS) > 1

2016 IEEE International Conference on Plasma Science (ICOPS)

A two-dimensional array of micro-discharges in air at atmospheric pressure is studied by cross correlation spectroscopy (CCS) [1]. The array consists of two insulated metal meshes and the discharge is generated by AC voltages at 20 kHz. A gas flow is applied through the array. The temporal resolution of CCS in the sub-ns range allowed to investigate the micro-discharges dynamics within a single micro-discharge...

chapter

Antimicrobial Treatment of Heat Sensitive Products by Atmospheric Pressure Plasma Sources

R. Brandenburg, U. Krohmann, M. Stieber, K. -D. Weltmann, more

NATO Science for Peace and Security Series A: Chemistry and Biology > Plasma Assisted Decontamination of Biological and Chemical Agents > Plasma for Bio-Decontamination > 51-63

The technological potential of non-thermal plasmas for the antimicrobial treatment of heat sensitive materials is well known. Despite a multitude of scientific activities with considerable progress within the last years the realization of industrial plasma-based decontamination or sterilization technology remains a great challenge. The aim of the work presented in this contribution is to demonstrate...

chapter

Spatio-Temporally Resolved Spectroscopic Diagnostics of the Barrier Discharge in N₂-O₂ Mixtures at Atmospheric Pressure

H.-E. Wagner, K. V. Kozlov, R. Brandenburg, A. M. Morozov

Gaseous Dielectrics X > Gas-Discharge Behavior: Basic Mechanisms > 77-86

Dielectric-barrier discharges (DBDs) belong to the group of cold nonequilibrium plasmas, characterized by a kinetic electron temperature of 1...10 eV and a near room gas temperature. They have found numerous applications in many fields. Usually DBDs operate in the so-called filamentary mode, namley in N₂-O₂ mixtures. If the local electric field strength in the gas gap arrives the ignition level, the...

article

On the Reduction of Gas‐Phase Naphthalene Using Char–Particles in a Packed–Bed Atmospheric Pressure Plasma

M. Hübner, R. Brandenburg, Y. Neubauer, J. Röpcke

Contributions to Plasma Physics > 55 > 10 > 747 - 752

Fuel and synthesis gases generated by thermochemical gasification of renewable biomass resources and organic waste fractions are considered to be promising for recent and future energy demands. However, the presence of tar species in the gas mixture is an economic obstacle in the commercialization of this technology. The influence of non‐thermal plasma on gas phase naphthalene

_{(C_{10} H_{8}),}

which served...

article

Process Evaluation Measures Effectively Assess Fidelity of Fuel for Fun Classroom Lessons

Jessica Clifford, S. Smith, R. Brandenburg, B. Lohse, more

Journal of Nutrition Education and Behavior > 2015 > 47 > 4(S) > S6

article

Non-thermal plasma based decomposition of volatile organic compounds in industrial exhaust gases

M. Schmidt, I. Jõgi, M. Hołub, R. Brandenburg

International Journal of Environmental Science and Technology > 2015 > 12 > 12 > 3745-3754

The decomposition of various volatile organic compounds (VOCs), namely butyl acetate, styrene, and methanol, by means of non-thermal plasma technology was investigated in different industrial exhaust gases. Although a great deal of effort on the investigation of these VOCs can be found in literature, data regarding the application in real exhaust gases are missing and provided in this contribution...

article

Plasma‐Based Pollutant Degradation in Gas Streams: Status, Examples and Outlook

R. Brandenburg, V. V. Kovačević, M. Schmidt, R. Basner, more

Contributions to Plasma Physics > 54 > 2 > 202 - 214

The status of the research into and the application of non‐thermal plasmas for the pollutant degradation in gases is discussed, including some fundamental topics and engineering issues. Two reactor concepts, both based on dielectric barrier discharges (DBDs), are presented and investigated for various tasks. The DBD‐stack reactor shows a very good scalability and was investigated for the oxidation...

article

On the Role of Capacitance Determination Accuracy for the Electrical Characterization of Pulsed Driven Dielectric Barrier Discharges

A. V. Pipa, T. Hoder, R. Brandenburg

Contributions to Plasma Physics > 53 > 6 > 469 - 480

A dielectric barrier discharge (DBD) of coaxial geometry has been investigated. The discharge cell was filled by 100 mbar of argon and driven by positive square voltage pulses with a rise time of 20 ns and 75 ns. The internal discharge characteristics such as the discharge current, the gas gap voltage, the instantaneous power and energy have been determined from measured current and voltage waveforms...

chapter

Dielectric barrier discharges: Pulsed breakdown, electrical characterization and Chemistry

R. Brandenburg, H. Hoft, T. Hoder, A. Pipa, more

2013 19th IEEE Pulsed Power Conference (PPC) > 1 - 5

2013 19th IEEE Pulsed Power Conference (PPC)

The application of atmospheric pressure discharges in new fields like environmental protection, surface treatment or life-sciences requires a profound knowledge on the plasma parameters and properties. This includes the characterization of the breakdown processes triggering plasma chemistry, the proper determination of the electrical parameters and the description of the dominant chemical pathways...

chapter

Evaluation of plasma induced liquid chemistry for bacteria treatment with a remote RF argon atmospheric pressure plasma jet

Sven Hofmann, Koen van Gils, R. Brandenburg, Peter J. Bruggeman, more

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) > 1

2013 IEEE 40th International Conference on Plasma Sciences (ICOPS)

The inactivation of bacteria suspended in liquids by an atmospheric pressure plasma is a complicated and yet not well understood process, due to several constituents of the “plasma cocktail” in the plasma/gas phase which can contribute to bacteria inactivation and the transport and chemistry processes of the created species in the liquid phase.

article

Development of Barrier Discharges: Operation Modes and Structure Formation

M. Bogaczyk, S. Nemschokmichal, R. Wild, L. Stollenwerk, more

Contributions to Plasma Physics > 52 > 10 > 847 - 855

A discharge cell configuration combining three high‐end diagnostic techniques (cross‐correlation spectroscopy, electro‐optic Pockels effect and laser induced fluorescence spectroscopy) has been developed. The joint application of these diagnostics enables the investigation of surface and bulk processes in barrier discharges in different arrangements. Surface charge density, N2(A) metastable state...

article

Skin decontamination by low-temperature atmospheric pressure plasma jet and dielectric barrier discharge plasma

G. Daeschlein, S. Scholz, R. Ahmed, T. von Woedtke, more

Journal of Hospital Infection > 2012 > 81 > 3 > 177-183

Over the past few years, plasma medicine has become an important field in medical science. Cold plasma has proven anti-inflammatory, antimicrobial and antineoplastic effects.To test the decontamination power of two cold plasma sources [low-temperature atmospheric pressure plasma jet (APPJ) and dielectric barrier discharge plasma (DBD)] in vivo on human fingertips.After 3, 15, 30, 60, 90, 120, 150,...

article

Plasma Process. Polym. 10/2011

Katrin Oehmigen, Jörn Winter, Marcel Hähnel, Christian Wilke, more

Plasma Processes and Polymers > 8 > 10 > n/a - n/a

Cover: A lot of analytics and microbiological tests were done to get an insight into the complex chemistry of atmospheric pressure plasma in interaction with liquids and the resulting antimicrobial effects. Different species are detected and a variety of reaction channels is hypothesized which lead to bactericidal molecules. Further details can be found in the article by K. Oehmigen, J. Winter, Ch...

article

Estimation of Possible Mechanisms of Escherichia coli Inactivation by Plasma Treated Sodium Chloride Solution

Katrin Oehmigen, Jörn Winter, Marcel Hähnel, Christian Wilke, more

Plasma Processes and Polymers > 8 > 10 > 904 - 913

Treatment of aqueous liquids by surface‐DBD in atmospheric air resulted in bactericidal activity of the liquid itself. A 7 min treatment of sodium chloride (NaCl) solution and its immediate addition to Escherichia coli resulted in a complete bacteria inactivation (≥7 log) after 15 min exposure time. With a 30 min delay between plasma treatment of liquid and its addition to the bacteria, bactericidal...

article

In Vitro Killing of Clinical Fungal Strains by Low-Temperature Atmospheric-Pressure Plasma Jet

G Daeschlein, S Scholz, T von Woedtke, M Niggemeier, more

IEEE Transactions on Plasma Science > 2011 > 39 > 2 > 815 - 821

Plasma medicine is an expanding focus and offers new aspects of therapy combining potent physical partial efficacies, like such as ultraviolet, infrared, and reactive species and particles, and nowadays, many successful treatments of different illnesses have been described. Fungal skin and nail infections pose significant therapeutic and economical problems. To test the plasma susceptibility of clinical...

article

The Role of Acidification for Antimicrobial Activity of Atmospheric Pressure Plasma in Liquids

K. Oehmigen, M. Hähnel, R. Brandenburg, Ch. Wilke, more

Plasma Processes and Polymers > 7 > 3‐4 > 250 - 257

Water disinfection by indirect plasma treatment was investigated using a surface dielectric barrier discharge (DBD). Liquid was neither part of the discharge electrode configuration nor stirred during plasma treatment. High concentrations (10⁶–10⁸ cfu·mL⁻¹) of Escherichia coli and Staphylococcus aureus have been completely inactivated within 5–15 min, depending on liquid sample volume. Inactivation...

article

The Influence of Direct Non-Thermal Plasma Treatment on Particulate Matter (PM) and NOx in the Exhaust of Marine Diesel Engines

M. Holub, S. Kalisiak, T. Borkowski, J. Myskow, more

Polish Journal of Environmental Studies > 2010 > 19 > 6

rekord w opracowaniu

article

Spatio-temporal development of microdischarges in a surface barrier discharge arrangement in air at atmospheric pressure

H. Grosch, T. Hoder, K.-D. Weltmann, R. Brandenburg

The European Physical Journal D > 2010 > 60 > 3 > 547-553

The spatio-temporal development of single microdischarges in an asymmetric surface barrier discharge arrangement was investigated. The arrangement consisted of two needle electrodes laid on a dielectric plate. The discharge was operated in dry air at atmospheric pressure with a sinusoidal applied voltage. The discharge was investigated by current-voltage measurements as well as two optical techniques,...

article

Identification of Unexpected Nonatherosclerotic Cardiovascular Disease With Coronary CT Angiography

Thomas Knickelbine, John R. Lesser, Tammy S. Haas, Eric R. Brandenburg, more

JACC: Cardiovascular Imaging > 2009 > 2 > 9 > 1085-1092

The aim of this study was to assess, in a general cardiology cohort screened for obstructive coronary artery disease (CAD), the effectiveness and frequency with which multidetector computed tomography (MDCT) angiography unexpectedly imaged and identified other nonatherosclerotic cardiovascular diseases. MDCT angiography is a novel imaging strategy employed primarily to diagnose CAD that, in the...

article

Antimicrobial Effects of UV and VUV Radiation of Nonthermal Plasma Jets

R. Brandenburg, H. Lange, T. von Woedtke, M. Stieber, more

IEEE Transactions on Plasma Science > 2009 > 37 > 6-1 > 877 - 883

Radio-frequency-driven plasma jets in argon at atmospheric pressure have been shown to emit a significant amount of UV and VUV radiation. There is an increasing interest in the use of UV and VUV photons in many fields of research and in industry, in particular for life-science applications. In order to study the antimicrobial effect of plasma-emitted UV and VUV radiation, microbiological tests and...

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Search results for: R. Brandenburg

Investigation of an atmospheric pressure 2D-array of microdischarges in air using cross-correlation spectroscopy

Antimicrobial Treatment of Heat Sensitive Products by Atmospheric Pressure Plasma Sources

Spatio-Temporally Resolved Spectroscopic Diagnostics of the Barrier Discharge in N₂-O₂ Mixtures at Atmospheric Pressure

On the Reduction of Gas‐Phase Naphthalene Using Char–Particles in a Packed–Bed Atmospheric Pressure Plasma

Process Evaluation Measures Effectively Assess Fidelity of Fuel for Fun Classroom Lessons

Non-thermal plasma based decomposition of volatile organic compounds in industrial exhaust gases

Plasma‐Based Pollutant Degradation in Gas Streams: Status, Examples and Outlook

On the Role of Capacitance Determination Accuracy for the Electrical Characterization of Pulsed Driven Dielectric Barrier Discharges

Dielectric barrier discharges: Pulsed breakdown, electrical characterization and Chemistry

Evaluation of plasma induced liquid chemistry for bacteria treatment with a remote RF argon atmospheric pressure plasma jet

Development of Barrier Discharges: Operation Modes and Structure Formation

Skin decontamination by low-temperature atmospheric pressure plasma jet and dielectric barrier discharge plasma

Plasma Process. Polym. 10/2011

Estimation of Possible Mechanisms of Escherichia coli Inactivation by Plasma Treated Sodium Chloride Solution

In Vitro Killing of Clinical Fungal Strains by Low-Temperature Atmospheric-Pressure Plasma Jet

The Role of Acidification for Antimicrobial Activity of Atmospheric Pressure Plasma in Liquids

The Influence of Direct Non-Thermal Plasma Treatment on Particulate Matter (PM) and NOx in the Exhaust of Marine Diesel Engines

Spatio-temporal development of microdischarges in a surface barrier discharge arrangement in air at atmospheric pressure

Identification of Unexpected Nonatherosclerotic Cardiovascular Disease With Coronary CT Angiography

Antimicrobial Effects of UV and VUV Radiation of Nonthermal Plasma Jets

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