40 Result(s)

Chapter and Conference Paper

Numerical Study of Three-Dimensional Shock Control Bump Flank Effects on Buffet Behavior

Originally developed as a flow control device Shock Control Bumps (SCB) reduce wave drag of an aircraft wing at off-design in transonic speed effectively. Recently, another field of application for such bumps ...

R. Mayer, D. Zimmermann, K. Wawrzinek… in High Performance Computing in Science and … (2016)

Chapter and Conference Paper

Development of a Corrugated Polyimide-Based Electrode for Intrafascicular Use in Peripheral Nerves

This paper presents the first design of a corrugated polyimide-based electrode with the intention to improve the neuro-technical interface. The corrugation is achieved through tempering the polyimide substrate...

T. Boretius, D. Zimmermann, T. Stieglitz in World Congress on Medical Physics and Biom… (2009)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

Chapter and Conference Paper

The Kascade-Grande experiment

The KASCADE-Grande experiment measures extensive air showers induced by primary cosmic rays in the energy range 10¹⁴ – 10¹⁸ eV. The major motivation for KASCADE-Grande is the investigation of the so called ”knee”...

M. Brüggemann, M. Stümpert, J. van Buren… in Neutrinos and Explosive Events in the Univ… (2005)

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)

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)

Article

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