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304 results on '"Siegmund, D."'

5. TRAIL forciert Invasion von duktalen Pankreasadenokarzinomzellen in vitro und in vivo

Author

Trauzold, A., Schniewind, B., Siegmund, D., Emme, D., Klose, S., Röder, C., Wajant, H., Kalthoff, H., Bruch, H. P., editor, Büchler, M. W., editor, Buhr, H. J., editor, Hohenberger, W., editor, Klar, E., editor, Kremer, B., editor, Post, S., editor, Schilling, M., editor, Schumpelick, V., editor, Siewert, J. R., editor, Thiede, A., editor, Becker, H., editor, Bittner, R., editor, Függer, R., editor, Köckerling, F., editor, Saeger, H. D., editor, Zornig, C., editor, Hölscher, A., editor, Izbicki, J. R., editor, Junginger, T., editor, Senninger, N., editor, Allgayer, H., editor, Broll, R., editor, Bruns, C. J., editor, Fries, H., editor, Kalthoff, H., editor, Schackert, H. K., editor, Ertel, W., editor, Faist, E., editor, Holzheimer, R. G., editor, Holzmann, B., editor, Schade, U. F., editor, Vollmar, B., editor, Brückner, U. B., editor, Heidecke, C. D., editor, Menger, M. D., editor, Neugebauer, E., editor, Spiegel, H. U., editor, Biemer, E., editor, Germann, G., editor, Haas, N., editor, Machens, H. G., editor, Stark, G. B., editor, Steinau, H. U., editor, Haverich, A., editor, Heberer, M., editor, Rogiers, X., editor, Jauch, K. W., editor, Roth, H., editor, von Schweinitz, D., editor, Waag, K. L., editor, Altendorf-Hofmann, A., editor, Celik, I., editor, Lehnert, T., editor, Lorenz, W., editor, Ohmann, C., editor, Bechstein, W. O., editor, Broelsch, C., editor, Hopt, U., editor, Klempnauer, J., editor, Neuhaus, P., editor, Fändrich, F., editor, Markus, B., editor, Minor, T., editor, Wonigeit, K., editor, Dralle, H., editor, Goretzki, P. E., editor, Rothmund, M., editor, Bühren, V., editor, Josten, C., editor, Muhr, G., editor, Nast-Kolb, D., editor, Stürmer, K. M., editor, Trentz, O., editor, Brunkwall, J., editor, Sandmann, W., editor, Schmitz-Rixen, T., editor, Storck, M., editor, Branscheid, D., editor, Dienemann, H., editor, Hirner, A., editor, Passlick, B., editor, Toomes, H., editor, Beyersdorf, F., editor, Hetzer, R., editor, Schäfers, H. J., editor, Zerkowski, H. R., editor, Becker, H. D., editor, Saeger, H. -D., editor, Jauch, K. -W., editor, and Bauer, H., editor

Published
2006
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39. Couplings for irregular combinatorial assemblies

Author

Barbour, A D, Chan, H P, Siegmund, D, Barbour, A D ( A D ), Chan, H P ( H P ), Siegmund, D ( D ), Pósfai, Anna, Barbour, A D, Chan, H P, Siegmund, D, Barbour, A D ( A D ), Chan, H P ( H P ), Siegmund, D ( D ), and Pósfai, Anna

Abstract

When approximating the joint distribution of the component counts of a decomposable combinatorial structure that is ‘almost’ in the logarithmic class, but nonetheless has irregular structure, it is useful to be able first to establish that the distribution of a certain sum of non-negative integer valued random variables is smooth. This distribution is not like the normal, and individual summands can contribute a non-trivial amount to the whole, so its smoothness is somewhat surprising. In this paper, we consider two coupling approaches to establishing the smoothness, and contrast the results that are obtained.

Published
2012

40. Sulfur substitution in a Ni(cyclam) derivative results in lower overpotential for CO2 reduction and enhanced proton reduction.

Author

Gerschel, P., Warm, K., Farquhar, E. R., Englert, U., Reback, M. L., Siegmund, D., Ray, K., and Apfel, U.-P.

Subjects
SULFUR, OVERPOTENTIAL, ELECTROLYTIC reduction, PROTONS
Abstract

The replacement of the opposing nitrogen atoms in 1,4,8,11-tetraazacyclotetradecane (cyclam) with two sulfur atoms in 1,8-dithia-4,11-diazacyclotetradecane (dithiacyclam) enables the electrochemical reduction of protons and CO2via the corresponding nickel(ii) complex at more positive potentials. In addition, a 10-fold enhancement in the proton reduction rate of [Ni(dithiacyclam)]2+ relative to [Ni(cylcam)]2+ was observed. The study provides vital insight into Nature's choice of employing predominantly sulfur based ligand platforms in achieving biological proton and CO2 reductions. [ABSTRACT FROM AUTHOR]

Published
2019
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