Pattern formation in the polyacrylamide-methylene blue-sulfide-oxygen system

2000 ◽  
Vol 160 (1) ◽  
pp. 143-150
Author(s):  
E. Kasper ◽  
O. Steinbock ◽  
S.C. Müller
Keyword(s):  
Methylene Blue ◽  
Pattern Formation ◽  
Oxygen System

Pattern Formation in the Methylene Blue-Fructose-Oxygen System in Aqueous Solution and in Gel Systems

2000 ◽  
Vol 65 (9) ◽  
pp. 1394-1402 ◽  
Author(s):  
Ľubica Adamčíková ◽  
Mária Hupková ◽  
Peter Ševčík
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Pattern Formation ◽  
Alkaline Ph ◽  
Initial Reactant ◽  
Nonlinear Reaction ◽  
Oxygen System ◽  
Hydrodynamic Processes ◽  
Liquid Layer Thickness ◽  
Catalyzed Oxidation

Spatial patterns in methylene blue-catalyzed oxidation of fructose at alkaline pH were found in aqueous solution and in gel systems. In a thin liquid layer (thickness >2.4 mm) a mixture of spots and stripes was formed by interaction of a nonlinear reaction and the Rayleigh or Maragoni instabilities. The pattern formation was affected by initial reactant concentrations and by the thickness of the reaction mixture layer. Long-lasting structures were formed in gel systems (polyacrylamide, agar, gelatin). These patterns also arise primarily from hydrodynamic processes.

scholarly journals Complex Pattern Formation in the Polyacrylamide−Methylene Blue−Oxygen Reaction

1999 ◽  
Vol 103 (18) ◽  
pp. 3442-3446 ◽  
Author(s):  
Oliver Steinbock ◽  
Eric Kasper ◽  
Stefan C. Müller
Keyword(s):  
Methylene Blue ◽  
Pattern Formation ◽  
Complex Pattern ◽  
Oxygen Reaction

The Blue Bottle Experiment and Pattern Formation in this System

1997 ◽  
Vol 52 (8-9) ◽  
pp. 650-654 ◽  
Author(s):  
L’. Adamčíková ◽  
P. Ševčík
Keyword(s):  
Methylene Blue ◽  
Pattern Formation ◽  
Induction Period ◽  
Petri Dish ◽  
Spatial Structures ◽  
Open Petri Dish

Abstract The methylene blue - saccharide - NaOH system, the so-called “Blue Bottle” experiment was investigated. When this system is poured into an open petri dish, spatial structures start to generate after an induction period. The induction period increases in the order of xylose < glucose < galactose < arabinose < mannose.

Pattern Formation in the Methylene-Blue−Glucose System

2000 ◽  
Vol 104 (10) ◽  
pp. 2251-2259 ◽  
Author(s):  
A. J. Pons ◽  
F. Sagués ◽  
M. A. Bees ◽  
P. Graae Sørensen
Keyword(s):  
Methylene Blue ◽  
Pattern Formation ◽  
Glucose System

A SEM and Light Microscope Study of the Epidermal Leaf Structures of the Carnivorous Plant, Sarracenia purpurea, L.

1971 ◽  
Vol 29 ◽  
pp. 358-359
Author(s):  
B. J. Panessa ◽  
J. F. Gennaro
Keyword(s):  
Methylene Blue ◽  
Toluidine Blue ◽  
Outer Surface ◽  
Microscope Study ◽  
Light Microscope ◽  
Carnivorous Plant ◽  
Sarracenia Purpurea ◽  
Inner Surface

Tissue from the hood and sarcophagus regions were fixed in 6% glutaraldehyde in 1 M.cacodylate buffer and washed in buffer. Tissue for SEM was partially dried, attached to aluminium targets with silver conducting paint, carbon-gold coated(100-500Å), and examined in a Kent Cambridge Stereoscan S4. Tissue for the light microscope was post fixed in 1% aqueous OsO4, dehydrated in acetone (4°C), embedded in Epon 812 and sectioned at ½u on a Sorvall MT 2 ultramicrotome. Cross and longitudinal sections were cut and stained with PAS, 0.5% toluidine blue and 1% azure II-methylene blue. Measurements were made from both SEM and Light micrographs.The tissue had two structurally distinct surfaces, an outer surface with small (225-500 µ) pubescent hairs (12/mm2), numerous stoma (77/mm2), and nectar glands(8/mm2); and an inner surface with large (784-1000 µ)stiff hairs(4/mm2), fewer stoma (46/mm2) and larger, more complex glands(16/mm2), presumably of a digestive nature.

Pattern formation in the splay Freedericks transition of a nematic side-group polysiloxane

1993 ◽  
Vol 3 (6) ◽  
pp. 865-889 ◽  
Author(s):  
Norbert Schwenk ◽  
Hans Wolfgang Spiess
Keyword(s):  
Pattern Formation ◽  
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