Search Results - "Benker, N."

THE SAHARAN AEROSOL LONG-RANGE TRANSPORT AND AEROSOL–CLOUD-INTERACTION EXPERIMENT: Overview and Selected Highlights by Weinzierl, Bernadett, Ansmann, A., Prospero, J. M., Althausen, D., Benker, N., Chouza, F., Dollner, M., Farrell, D., Fomba, W. K., Freudenthaler, V., Gasteiger, J., Groß, S., Haarig, M., Heinold, B., Kandler, K., Kristensen, T. B., Mayol-Bracero, O. L., Müller, T., Reitebuch, O., Sauer, D., Schäfler, A., Schepanski, K., Spanu, A., Tegen, I., Toledano, C., Walser, A.

“…North Africa is the world’s largest source of dust, a large part of which is transported across the Atlantic to the Caribbean and beyond where it can impact…”
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Source identification of individual soot agglomerates in Arctic air by transmission electron microscopy by Weinbruch, S., Benker, N., Kandler, K., Schütze, K., Kling, K., Berlinger, B., Thomassen, Y., Drotikova, T., Kallenborn, R.

“…Individual soot agglomerates collected at four different locations on the Arctic archipelago Svalbard (Norway) were characterised by transmission electron…”
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Oil supplementation with a special combination of n-3 and n-6 long-chain polyunsaturated fatty acids does not protect for exercise induced asthma: a double-blind placebo-controlled trial by Dressler, M, Fussbroich, D, Böhler, L, Herrmann, E, Benker, N, Tytyk, M, Schulze, J, Schubert, R, Beermann, C, Zielen, S

“…Abstract Background Many patients suffering from exercise-induced asthma (EIA) have normal lung function at rest and show symptoms and a decline in FEV 1 when…”
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Single-particle characterization of ice-nucleating particles and ice particle residuals sampled by three different techniques by Worringen, A, Kandler, K, Benker, N, Dirsch, T, Mertes, S, Schenk, L, Kästner, U, Frank, F, Nillius, B, Bundke, U, Rose, D, Curtius, J, Kupiszewski, P, Weingartner, E, Vochezer, P, Schneider, J, Schmidt, S, Weinbruch, S, Ebert, M

“…In the present work, three different techniques to separate ice-nucleating particles (INPs) as well as ice particle residuals (IPRs) from non-ice-active…”
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Chemical composition and mixing-state of ice residuals sampled within mixed phase clouds by Ebert, M, Worringen, A, Benker, N, Mertes, S, Weingartner, E, Weinbruch, S

“…During an intensive campaign at the high alpine research station Jungfraujoch, Switzerland, in February/March 2006 ice particle residuals within mixed-phase…”
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Physicochemical characterisation of different welding aerosols by Berlinger, B, Benker, N, Weinbruch, S, L`Vov, B, Ebert, M, Koch, W, Ellingsen, D. G, Thomassen, Y

“…Physicochemical properties important in exposure characterisation of four different welding aerosols were investigated. Particle number size distributions were…”
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Surfactant modified platinum based fuel cell cathode studied by X-ray absorption spectroscopy by Melke, J., Dixon, D., Riekehr, L., Benker, N., Langner, J., Lentz, C., Sezen, H., Nefedov, A., Wöll, C., Ehrenberg, H., Roth, C.

“…[Display omitted] •Pt catalyst with adsorbed TTAB is used as fuel cell cathode.•Due to the adsorbed TTAB fewer oxygen is adsorbed to the Pt surface as compared…”
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Bifunctional Electrocatalysis in Pt−Ru Nanoparticle Systems by Roth, C, Benker, N, Theissmann, R, Nichols, R. J, Schiffrin, D. J

“…Pt−Ru alloys are prominent electrocatalysts in fuel cell anodes as they feature a very high activity for the oxidation of reformate and methanol. The improved…”
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Structure investigation of low-temperature-grown GaAsSb, a material for photoconductive terahertz antennas by Sigmund, J., Sydlo, C., Hartnagel, H. L., Benker, N., Fuess, H., Rutz, F., Kleine-Ostmann, T., Koch, M.

“…The formation of precipitates after an annealing process in low-temperature-grown GaAs0.6Sb0.4 is observed. We use high-resolution transmission electron…”
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Pt-Ru fuel cell catalysts subjected to H2, CO, N2 and air atmosphere : An X-ray absorption study by ROTH, C, BENKER, N, MAZUREK, M, SCHEIBA, F, FUESS, H

“…In situ X-ray absorption spectroscopy (XAS) measurements were carried out on commercial carbon-supported Pt, Ru and Pt-Ru alloy electrocatalysts as well as a…”
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Development of an In-Situ Cell for X-ray Absorption Measurements During Fuel Cell Operation by Roth, C., Benker, N., Mazurek, M., Scheiba, F., Fuess, H.

“…A novel in‐situ cell was designed to allow measurements during real fuel cell operation. Thus, potential and fuel dependent changes in the catalyst structure…”
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Electrochemical Impedance and X-Ray Absorption Spectroscopy (EXAFS) as In-Situ Methods to Study the PEMFC Anode by Mazurek, M., Benker, N., Roth, C., Buhrmester, T., Fuess, H.

“…The effect of alloy formation on the performance of carbonsupported Pt and Ru fuel cell catalysts has been investigated by electrochemical impedance…”
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Chemical composition and complex refractive index of Saharan Mineral Dust at Izaña, Tenerife (Spain) derived by electron microscopy by Kandler, Konrad, Benker, Nathalie, Bundke, Ulrich, Cuevas, Emilio, Ebert, Martin, Knippertz, Peter, Rodríguez, Sergio, Schütz, Lothar, Weinbruch, Stephan

“…Samples from two strong homogeneous dust plumes from the Saharan desert reaching Izaña (Tenerife, Spain) in July and August 2005 were taken with a miniature…”
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Properties of cloud condensation nuclei (CCN) in the trade wind marine boundary layer of the western North Atlantic by Kristensen, Thomas B, Müller, Thomas, Kandler, Konrad, Benker, Nathalie, Hartmann, Markus, Prospero, Joseph M, Wiedensohler, Alfred, Stratmann, Frank

“…Cloud optical properties in the trade winds over the eastern Caribbean Sea have been shown to be sensitive to cloud condensation nuclei (CCN) concentrations…”
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Sub-micrometer refractory carbonaceous particles in the polar stratosphere by Schutze, Katharina, Wilson, James Charles, Weinbruch, Stephan, Benker, Nathalie, Ebert, Martin, Gunther, Gebhard, Weigel, Ralf, Borrmann, Stephan

“…Eleven particle samples collected in the polar stratosphere during SOLVE (SAGE III Ozone loss and validation experiment) from January until March 2000 were…”
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Determination of O[H] and CO Coverage and Adsorption Sites on PtRu Electrodes in an Operating PEM Fuel Cell by Roth, Christina, Benker, Nathalie, Buhrmester, Thorsten, Mazurek, Marian, Loster, Matthias, Fuess, Hartmut, Koningsberger, Diederik C, Ramaker, David E

“…A special in situ PEM fuel cell has been developed to allow X-ray absorption measurements during real fuel cell operation. Variations in both the coverage of…”
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The Influence of Chemical and Mineral Compositions on the Parameterization of Immersion Freezing by Volcanic Ash Particles by Umo, N. S., Ullrich, R., Maters, E. C., Steinke, I., Benker, N., Höhler, K., Wagner, R., Weidler, P. G., Hoshyaripour, G. A., Kiselev, A., Kueppers, U., Kandler, K., Dingwell, D. B., Leisner, T., Möhler, O.

“…Volcanic ash (VA) from explosive eruptions contributes to aerosol loadings in the atmosphere. Aside from the negative impact of VA on air quality and aviation,…”
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Pt-Ru fuel cell catalysts subjected to H 2, CO, N 2 and air atmosphere: An X-ray absorption study by Roth, C., Benker, N., Mazurek, M., Scheiba, F., Fuess, H.

“…A novel reactor/furnace set-up has been used for in situ XANES and EXAFS measurements of Pt-Ru fuel cell catalysts in different atmospheres at elevated…”
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Electron microscopy techniques for the analysis of the polymer electrolyte distribution in proton exchange membrane fuel cells by Scheiba, Frieder, Benker, Nathalie, Kunz, Ulrike, Roth, Christina, Fuess, Hartmut

“…The polymer electrolyte distribution in PEMFC electrodes plays an important role for the catalyst utilization and various transport processes in the electrode…”
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Hygroscopic properties of the workroom aerosol in aluminium smelter potrooms: a case for transport of HF and SO2 into the lower airways by Weinbruch, S, Benker, N, Koch, W, Ebert, M, Drabløs, P A, Skaugset, N P, Ellingsen, D G, Thomassen, Y

“…The hygroscopic behaviour of individual aerosol particles from workplaces in a primary aluminium smelter was investigated by environmental scanning electron…”
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