Capillarity-Induced Propagation Reversal of Chemical Waves in a Self-oscillating Gel

The role of ‘generic’ physical mechanisms in morphogenesis and pattern formation of tissues is considered. Generic mechanisms are defined as those physical processes that are broadly applicable to living and non-living systems, such as adhesion, surface tension and gravitational effects, viscosity, phase separation, convection and reaction-diffusion coupling. They are contrasted with ‘genetic’ mechanisms, a term reserved for highly evolved, machine-like, biomolecular processes. Generic mechanisms acting upon living tissues are capable of giving rise to morphogenetic rearrangements of cytoplasmic, tissue and extracellular matrix components, sometimes leading to ‘microfingers’, and to chemical waves or stripes. We suggest that many morphogenetic and patterning effects are the inevitable outcome of recognized physical properties of tissues, and that generic physical mechanisms that act on these properties are complementary to, and interdependent with genetic mechanisms. We also suggest that major morphological reorganizations in phylogenetic lineages may arise by the action of generic physical mechanisms on developing embryos. Subsequent evolution of genetic mechanisms could stabilize and refine developmental outcomes originally guided by generic effects.

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Visualization of Chemical Waves in Belousov‐Zhabotinsky Reaction by Chemical Imaging Sensors

Journal of The Electrochemical Society ◽

10.1149/1.1838111 ◽

1997 ◽

Vol 144 (11) ◽

pp. 3919-3921 ◽

Cited By ~ 2

Author(s):

Tatsuo Yoshinobu ◽

Noriko Oba ◽

Hiroshi Iwasaki

Keyword(s):

Chemical Imaging ◽

Chemical Waves ◽

Imaging Sensors ◽

Belousov Zhabotinsky Reaction

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ChemInform Abstract: CHEMICAL WAVES IN THE 2,4-PENTANEDIONE POTASSIUM BROMATE SYSTEM

Chemischer Informationsdienst ◽

10.1002/chin.197706147 ◽

1977 ◽

Vol 8 (6) ◽

pp. no-no

Author(s):

W. JESSEN ◽

H. G. BUSSE ◽

B. H. HAVSTEEN

Keyword(s):

Potassium Bromate ◽

Chemical Waves

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Atomic Scale Imaging of Oscillation and Chemical Waves at Catalytic Surface Reactions

Finely Dispersed Particles - Surfactant Science ◽

10.1201/9781420027662.ch7 ◽

2005 ◽

pp. 159-190

Author(s):

Vladimir Gorodetskii ◽

Vladimir Elokhin

Keyword(s):

Surface Reactions ◽

Atomic Scale ◽

Catalytic Surface ◽

Chemical Waves ◽

Catalytic Surface Reactions

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Reactive/Non-cooperative individuals advance Population's Synchronization: Modeling of Dictyostelium discoideum Concerted Signaling during Aggregation Phase

10.1101/2021.05.22.445258 ◽

2021 ◽

Author(s):

Zahra Eidi ◽

Najme Khorasani ◽

Mehdi Sadeghi

Keyword(s):

Life Form ◽

Single Cells ◽

Model Organism ◽

Spatiotemporal Patterns ◽

Chemical Signaling ◽

Relative Population ◽

Social Amoeba ◽

The Social ◽

Chemical Waves ◽

The Waves

Orchestrated chemical signaling of single cells sounds to be a linchpin of emerging organization and multicellular life form. The social amoeba Dictiostelium discoiudium is a well-studied model organism to explore overall pictures of grouped behavior in developmental biology. The chemical waves secreted by aggregating Dictiostelium is a superb example of pattern formation. The waves are either circular or spiral in shape, according to the incremental population density of a self-aggregating community of individuals. Here, we revisit the spatiotemporal patterns that appear in an excitable medium due to synchronization of randomly firing individuals, but with a more parsimonies attitude. According to our model, a fraction of these individuals is refusal to amplify external stimulants. Our simulations indicate that the cells enhance the system's asymmetry and as a result, nucleate early sustainable spiral territory zones, provided that their relative population does not exceed a tolerable threshold.

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