An Experimental Study on Stripe Pattern Formation of Ag−Sb Electrodeposits

2004 ◽  
Vol 108 (17) ◽  
pp. 5380-5385 ◽  
Author(s):  
M. Saitou ◽  
Y. Fukuoka
Keyword(s):  
Experimental Study ◽  
Pattern Formation ◽  
Stripe Pattern

scholarly journals Experimental study on laser pattern formation by strong nonlinear effects in rubidium atomic hot vapor

2008 ◽  
Vol 57 (7) ◽  
pp. 4224
Author(s):  
Guo Lu ◽  
Wei Dong ◽  
Chen Hai-Xia ◽  
Xiong De-Zhi ◽  
Wang Peng-Jun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pattern Formation ◽  
Nonlinear Effects

Mechanism of Meniscus Oscillations and Stripe Pattern Formation in Langmuir−Blodgett Films

2003 ◽  
Vol 107 (15) ◽  
pp. 3486-3495 ◽  
Author(s):  
V. I. Kovalchuk ◽  
M. P. Bondarenko ◽  
E. K. Zholkovskiy ◽  
D. Vollhardt
Keyword(s):  
Pattern Formation ◽  
Stripe Pattern ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

scholarly journals Modelling stripe formation in zebrafish: an agent-based approach

2015 ◽  
Vol 12 (112) ◽  
pp. 20150812 ◽  
Author(s):  
Alexandria Volkening ◽  
Björn Sandstede
Keyword(s):  
Laser Ablation ◽  
Pattern Formation ◽  
Long Range ◽  
Pigment Cell ◽  
Experimental Results ◽  
Fish Growth ◽  
Pigment Cells ◽  
Stripe Pattern ◽  
Agent Based ◽  
Long Range Interactions

Zebrafish have distinctive black stripes and yellow interstripes that form owing to the interaction of different pigment cells. We present a two-population agent-based model for the development and regeneration of these stripes and interstripes informed by recent experimental results. Our model describes stripe pattern formation, laser ablation and mutations. We find that fish growth shortens the necessary scale for long-range interactions and that iridophores, a third type of pigment cell, help align stripes and interstripes.

CROSS-DIFFUSION-DRIVEN PATTERN FORMATION AND SELECTION IN A MODIFIED LESLIE–GOWER PREDATOR–PREY MODEL WITH FEAR EFFECT

2020 ◽  
Vol 28 (01) ◽  
pp. 27-64 ◽  
Author(s):  
RENJI HAN ◽  
LAKSHMI NARAYAN GUIN ◽  
BINXIANG DAI
Keyword(s):  
Pattern Formation ◽  
Diffusion Processes ◽  
Great Influence ◽  
Spatiotemporal Pattern ◽  
Type Model ◽  
Inhomogeneous Distribution ◽  
Stripe Pattern ◽  
Cross Diffusion ◽  
Predator Prey Model ◽  
Spatially Inhomogeneous

Spatial patterns through diffusion-driven instability are stationary structures that appear spontaneously upon breaking the symmetry of the spatial domain, which results only from the coupling between the reaction and the diffusion processes. This paper is concerned with a modified Leslie–Gower-type model with cross-diffusion and indirect predation effect. We first prove the global existence, non-negativity and uniform boundedness for the considered model. Then the linear stability analysis shows that the cross-diffusion is the key mechanism of spatiotemporal pattern formation. Amplitude equations are derived near Turing bifurcation point under nonlinear cross-diffusion to interpret pattern selection among spot pattern, stripe pattern and the mixture of spot and stripe patterns, which reflects the species’s spatially inhomogeneous distribution, and it is also found that the fear factor has great influence on spatially inhomogeneous distribution of the two species under certain cross-diffusivity, that is, high level of fear can induce striped inhomogeneous distribution, low level of fear can induce spotted inhomogeneous distribution, and the intermediate level of fear can induce the mixture of spotted and striped inhomogeneous distribution. Finally, numerical simulations illustrate the effectiveness of all theoretical results.

scholarly journals Toll ligand Spätzle3 controls melanization in the stripe pattern formation in caterpillars

2017 ◽  
Vol 114 (31) ◽  
pp. 8336-8341 ◽  
Author(s):  
Yûsuke KonDo ◽  
Shinichi Yoda ◽  
Takayuki Mizoguchi ◽  
Toshiya Ando ◽  
Junichi Yamaguchi ◽  
...  
Keyword(s):  
Pattern Formation ◽  
Candidate Genes ◽  
Receptor Gene ◽  
Ectopic Expression ◽  
Axis Formation ◽  
Specific Expression ◽  
Stripe Pattern ◽  
Black Stripe ◽  
Melanin Pigmentation ◽  
Toll Signaling

A stripe pattern is an aposematic or camouflage coloration often observed among various caterpillars. However, how this ecologically important pattern is formed is largely unknown. The silkworm dominant mutant Zebra (Ze) has a black stripe in the anterior margin of each dorsal segment. Here, fine linkage mapping of 3,135 larvae revealed a 63-kbp region responsible for the Ze locus, which contained three candidate genes, including the Toll ligand gene spätzle3 (spz-3). Both electroporation-mediated ectopic expression and RNAi analyses showed that, among candidate genes, only processed spz-3 induced melanin pigmentation and that Toll-8 was the candidate receptor gene of spz-3. This Toll ligand/receptor set is also involved in melanization of other mutant Striped (pS), which has broader stripes. Additional knockdown of 5 other spz family and 10 Toll-related genes caused no drastic change in the pigmentation of either mutant, suggesting that only spz-3/Toll-8 is mainly involved in the melanization process rather than pattern formation. The downstream pigmentation gene yellow was specifically up-regulated in the striped region of the Ze mutant, but spz-3 showed no such region-specific expression. Toll signaling pathways are known to be involved in innate immunity, dorsoventral axis formation, and neurotrophic functions. This study provides direct evidence that a Toll signaling pathway is co-opted to control the melanization process and adaptive striped pattern formation in caterpillars.

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