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  1. Article

    Open Access

    Distribution and function of epistomatal mucilage plugs

    Investigation of 67 gymnosperm and angiosperm species belonging to 25 orders shows that epistomatal mucilage plugs are a widespread phenomenon. Measurements of the leaf water status by using the leaf patch cla...

    M. Westhoff, D. Zimmermann, G. Zimmermann, P. Gessner, L. H. Wegner in Protoplasma (2009)

  2. No Access

    Article

    Histone deacetylase inhibitors and hydroxyurea modulate the cell cycle and cooperatively induce apoptosis

    Therapy resistance represents a major problem for disease management in oncology. Histone deacetylase inhibitors (HDACi) have been shown to modulate the cell cycle, to induce apoptosis and to sensitize cancer ...

    O H Krämer, S K Knauer, D Zimmermann, R H Stauber, T Heinzel in Oncogene (2008)

  3. Article

    Open Access

    A Combined Patch-Clamp and Electrorotation Study of the Voltage- and Frequency-Dependent Membrane Capacitance Caused by Structurally Dissimilar Lipophilic Anions

    Interactions of structurally dissimilar anionic compounds with the plasma membrane of HEK293 cells were analyzed by patch clamp and electrorotation. The combined approach provides complementary information on ...

    D. Zimmermann, M. Kiesel, U. Terpitz, A. Zhou, R. Reuss in Journal of Membrane Biology (2008)

  4. No Access

    Article

    Hydrogel-based encapsulation of biological, functional tissue: fundamentals, technologies and applications

    Replacing dysfunctional endocrine cells or tissues (e.g. islets, parathyroid tissue) by functional, foreign material without using immunosuppressives could soon become reality. Immunological reactions are avoi...

    H. Zimmermann, F. Ehrhart, D. Zimmermann, K. Müller, A. Katsen-Globa in Applied Physics A (2007)

  5. No Access

    Article

    Foliar water supply of tall trees: evidence for mucilage-facilitated moisture uptake from the atmosphere and the impact on pressure bomb measurements

    The water supply to leaves of 25 to 60 m tall trees (including high-salinity-tolerant ones) was studied. The filling status of the xylem vessels was determined by xylem sap extraction (using jet-discharge, gra...

    D. Zimmermann, M. Westhoff, G. Zimmermann, P. Geßner, A. Gessner in Protoplasma (2007)

  6. No Access

    Article

    Role of undecan-2-one on ethanol-induced apoptosis in HepG2 cells

    Based on the reduced expression of ethanol-oxidizing enzymes in human hepatocellular carcinoma (HepG2) cells, we analyzed the role of nonoxidative metabolites in ethanol-induced apoptosis in HepG2 cells. For t...

    F. Castaneda, D. Zimmermann, J. Nolte, J. I. Baumbach in Cell Biology and Toxicology (2007)

  7. No Access

    Article

    Photofragment space distribution in the photodissociation of NaI in the spectral range 315–370 nm: the role of molecular axis rotation

    The first determination of translational anisotropy parameters β in the photodissociation of NaI molecules in the spectral range 315–370 nm is reported. The anisotropy parameters were determined by the anal...

    K. O. Korovin, E. Heinecke, A. Patzer, T. Liebig in The European Physical Journal D (2007)

  8. No Access

    Article

    Tests of hadronic interaction models by data of the KASCADE-Grande air-shower experiment

    KASCADE-Grande is a multi-detector setup to get redundant information on single air shower basis. The information is used to perform multi-parameter analyses to solve the threefold problem of the reconstructio...

    A. Haungs, M. Risse, W. D. Apel, F. Badea, K. Bekk in Czechoslovak Journal of Physics (2006)

  9. No Access

    Article

    Correlation between hordatine accumulation, environmental factors and genetic diversity in wild barley (Hordeum spontaneum C. Koch) accessions from the Near East Fertile Crescent

    Wild barley shows a large morphological and phenotypic variation, which is associated with ecogeographical factors and correlates with genotypic differences. Diversity of defense related genes and their expres...

    A. K. Batchu, D. Zimmermann, P. Schulze-Lefert, T. Koprek in Genetica (2006)

  10. No Access

    Article

    Determination of the amplitudes and phases of the scattering matrix upon photodissociation of molecules

    The photodissociation of RbI molecules via the second excited state under the action of circularly polarized radiation with a wavelength of 266 nm is studied. By using sub-Doppler Faraday spectroscopy, the ang...

    K. O. Korovin, A. A. Veselov, E. M. Mikheev, O. S. Vasyutinskii in Optics and Spectroscopy (2005)

  11. No Access

    Article

    Surviving High-Intensity Field Pulses: Strategies for Improving Robustness and Performance of Electrotransfection and Electrofusion

    Electrotransfection and electrofusion, both widely used in research and medical applications, still have to face a range of problems, including the existence of electroporation-resistant cell types, cell morta...

    V.L. Sukhorukov, R. Reuss, D. Zimmermann, C. Held in The Journal of Membrane Biology (2005)

  12. No Access

    Article

    Towards a medically approved technology for alginate-based microcapsules allowing long-term immunoisolated transplantation

    The concept of encapsulated-cell therapy is very appealing, but in practice a great deal of technology and know-how is needed for the production of long-term functional transplants. Alginate is one of the most...

    H. Zimmermann, D. Zimmermann, R. Reuss in Journal of Materials Science: Materials in… (2005)

  13. No Access

    Article

    Detection and imaging of atmospheric radio flashes from cosmic ray air showers

    The origin of ultrahigh-energy cosmic rays is one of the most profound mysteries in high-energy astrophysics. No standard supernovae, pulsars or black holes can accelerate particles to such enormous energies, ...

    H. Falcke, W. D. Apel, A. F. Badea, L. Bähren, K. Bekk, A. Bercuci, M. Bertaina in Nature (2005)

  14. No Access

    Article

    Cross-linking properties of alginate gels determined by using advanced NMR imaging and Cu2+ as contrast agent

    The entrapment of enzymes, drugs, cells or tissue fragments in alginates cross-linked with Ca2+ or Ba2+ has great potential in basic research, biotechnology and medicine. The swelling properties and, in turn, the...

    B. Manz, M. Hillgärtner, H. Zimmermann, D. Zimmermann in European Biophysics Journal (2004)

  15. No Access

    Article

    Hyperfine structure in the atomic spectrum of niobium

    We report on hyperfine structure measurements in 21 lines of atomic niobium in the spectral region from 640 nm to 870 nm by means of optogalvanic laser spectroscopy and laser induced fluorescence spectroscopy ...

    A. Bouzed, S. Kröger, D. Zimmermann in The European Physical Journal D - Atomic, … (2003)

  16. No Access

    Article

    High resolution laser spectroscopy of NaAr: Improved interaction potential for the ground state

    The absorption spectrum of NaAr has been investigated with high resolution using a supersonic beam of molecules and a tunable dye laser. About 3 300 absorption lines due to the transition A 2 ...

    D. Schwarzhans, D. Zimmermann in The European Physical Journal D - Atomic, … (2003)

  17. No Access

    Article

    Messung mit dem [13C2]Oxalatabsorptionstest

    D. Zimmermann, G. E. von Unruh, A. Hesse in Der Urologe B (2002)

  18. No Access

    Article

    Determination of photodissociation anisotropy parameter β for RbI molecules by sub-Doppler spectroscopy

    The photodissociation of RbI molecules upon exposure to polarized laser radiation with a wave-length of 266 nm is investigated. The anisotropy parameter β and the parameter ζ characterizing thermal motion of R...

    K. O. Korovin, A. A. Veselov, O. S. Vasyutinskii, D. Zimmermann in Optics and Spectroscopy (2002)

  19. No Access

    Article

    Spectra of highly ionized xenon (6–30 nm) excited in W7-AS plasmas

    The xenon spectrum, excited in ECR- and NBI-heated plasmas with central electron densities of around 1020 m-3, and central electron temperatures from 0.7 to 2.5 keV, has been studied photoelectrically with a mult...

    H.H. Hacker, R. Burhenn, K. Kondo, M. Anton, D. Assmus, S. Baeumel in Applied Physics B (2001)

  20. No Access

    Article

    Microwave detection of molecules formed by shock wave induced reactions

    The paper describes experimental investigations in a shock tube concerning the formation of new molecules using He as a driver gas and a mixture of Kr, CH \(_4\) and NH ...

    D. Ewert, H. Grönig, H. Olivier, W. Stahl, E. Sedlmayr, D. Zimmermann in Shock Waves (1998)

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