Otto-von-Guericke-Universität Magdeburg

 
 
 
 
 
 
 
 

Picture Gallery

Structures in biochemical systems

Gallery (22 pictures)

Chemical waves in the Beolousov-Zhabotinsky reaction

Chemical waves in the Beluosov-Zhabotinsky reaction

Wave structures in a petri dish (target pattern and a counterrotating double spiral).

 

 

 

Spirals on a nonuniformly curved surfaceSpirals on a nonunoformly curved surface.

 

 


 

Spirals on hemispherical shells with different radiiSpirals on hemisherical shells with different radii.

 

 

 

 

Wave structures in a weakly exciatble medium induced by a defectWave structures in a weakly excitable medium induced by a defect.

 

 

 

 

 

Drift of a spiral core under feedback-controlle forcingDrift of spiral core under feedback-controlled forcing (creation of a resonace reactor).

 

 

 

 

 "Chemical canyons"´Chemical Canyons´ - 3D graphic representation of an exciation wave.
© S. C. Müller, Th. Plesser and B. Hess

 

 

 

 

Visualization of a spiral core by superposition of 6 pictures during one rotation Visualization of a "resting" spiral core by superposition of 6 pictures during one rotation.
© S. C. Müller, Th. Plesser and B. Hess

 

 

´Chemical Tornado´ Spiral core in 3D perspective "Chemical Tornado" - Spiral core in 3D perspective.
© S. C. Müller, Th. Plesser and B. Hess

 

 

 
 


Tomographic reconstruction of a scroll wave3D structures

Tomographic reconstruction of a three dimensinal spiral wave (i.e. a cylindric continuation of a spiral).
Top: Enlagement of the picture in the center,
Bottom: Time series of a scroll wave,
Left: Initial scroll wave, slightly twisted,
Middle and right: Rest of a scroll wave, sending out plane wave fronts.
 


 

 

 


Stationalry structures in an autocatalytic reaction´Pinstriped´ activation centers in the methylene blue-oxygen-sulfite reaction

"Pinstriped" activation centers in the methylene blue-oxygen-sulfite reaction.

 

 



 


´Honeycomb´ pattern in the methylene blue-oxygen-sulfite reaction in a polyacrylamide gel"Honeycomb" pattern in the methylene blue-oxygen-sulfite reaction in a polyacrylamide gel.

 

 

 

 

 


Instability of an autocatalytic front
Front instability

Instability of an autocatalytic front leads to complex spiral pattern (numerical simulation).

 

 

 

 

Density driven convection deforming a rising reaction front into a fingering structureDensity driven convection deforming a rising reaction front into a fingering structure.

 

 

 

Fingers of solidified lava in the Tide mountains, Las Canarias, Tenerife

Fingers of solidified lava in the Tide mountains, Las Canarias, Tenerife
(photo by M. Böckmann).

 

 

 


Structures in biochemical systems

 

Exciation front during glycolysis in cytoplasm extracted of yeast cellsGlycolysis

Biochemical example of an exciation front, observed during the glycolysis in cytoplasm extracted of yeast cells.

 


 

Circular waves during the glycolysis in cytoplasm extracted of yeast cellsCircular waves during the glycolysis in cytoplasm extracted of yeast cells.

 

 

 

 

Spiral waves of NADH during glycolysis in cytoplasm extracted of yeast cellsSpiral waves of NADH during the glycolysis in cytoplasm extracted of yeast cells.

 

 

 

 

Spiral waves of protons during glycolysis in cytoplasm extracted of yeast cellsSpiral waves of H+ during the glycolysis in cytoplasm extracted of yeast cells.

 

 

 

 


Structures in biological systems

Spiral-shaped propagation of ´Spreading Depression´ in neuronal tissueSpiral waves in biological systems

Spiral-shaped propagation of "Spreading Depression" in neuronal tissue, here on the chicken retina.

 

 

 

A sequence of superimposed pictures indicates the Z-shaped geometry of the spiral coreA sequence of superimosed pictures indicates the Z-shaped geometry of the spiral core.


 

 

 

 

Spiral geometry of a signal transmitter in an amoeba population (Dictyostelium dicoideum)Spiral geometry of a signal transmitter in an amoeba population (Dictyostelium dicoideum) leads to chemotactic movements of cells in direction of the spiral core.

 

 

 

 

Single cells of an amoeba population flow together in a vortex-shaped movementIn the area of the spiral core of an amoeba population many single cells of an amoeba population flow together in a vortex-shaped movement. This results in the growth of a multicellular organism.

 

 

 


Stationalry distribution of alkaline and acid regions around an illuminated Chara cellStationary bands in Chara cells

Stationalry distribution of alkaline and acid regions around an illuminated Chara cell. The pattern was visualized using phenol red. Red spots correspond to alkaline regions.


Further Spirals

Lichen in the tundra.Lichen in the tundra
(photo by A. Polzek)

 

 

Rayleigh-Bénard convection in SF6 near the gas-liquid critical point.Rayleigh-Bénard convection

 

 

 

Helicoidal Liesegang precipitation band of PbI2 in agar Helicoidal Liesegang precipitation band of PbI2 in agar.

 

 

 

 

 

 

 

 

 

 

 

 

 

 




Spiral galaxy NGC 1232Spiral galaxy NGC 1232.
(NASA)

 


 

 

 

Spiral formation on the surface of a growing cell

Spiral formation on the surface of a growing cell
(K. Wada, 1966).

 

 

 

 


Structural similarity

Hydrodynamical convection rollsHydrodynamical convection rolls.

 

 

 

Surface of a coral.Surface of a coral

 

 

 


Salt formation in the Atacama desertSalt formation in the Atakama desert.
(Picture card, Chile)

 

 


Mushroom sporeMushroom spore
(M. Ebert, Umweltmineralogie, TU Darmstadt).

 

 

 

 

 

Letzte Änderung: 04.04.2013 - Contact Person: Dr. rer. nat. Patricia Pfeiffer
 
 
 
 
Instability of an autocatalytic front
Head of Department:
Prof. Dr. rer. nat. habil.
Stefan C. Müller

Otto-von-Guericke University Magdeburg
Universitätsplatz 2
39106 Magdeburg
Building 20-102
Phone +49 (0)391/67 18936
Fax     +49 (0)391/67 20166
Email stefan.mueller