scholarly journals Temperature-dependent colour change is a function of sex and directionality of temperature shift in the eastern fence lizard (Sceloporus undulatus)

Author(s):  
Barry P. Stephenson ◽  
Nikolett Ihász ◽  
David C. Byrd ◽  
John Swierk ◽  
Lindsey Swierk
1982 ◽  
Vol 37 (10) ◽  
pp. 1040-1041 ◽  
Author(s):  
Arthur Holl

Abstract In the green coloured larvae of Micromata rosea but not in adults temperature raise above 29 °C causes immediate colour change: green to bluish-green. Colour change is reversible by temperature decline below 29 °C. Qualitative analysis of the yolk pigment reveals the same biliverdin conjugates (micromatabilin) as previously identified for adult spiders. The bluish-green colour (above 29 °C) re­sults from an absorption band (675-680 nm, water phase, purified solution) modified to that of the green solution (below 29 °C). Presumably, the thermodependent, rever­sible colour change is due to a special yolk protein bond to the micromatabilin chromophor.


2006 ◽  
Vol 7 (1) ◽  
pp. 113-116 ◽  
Author(s):  
E. B. ROSENBLUM ◽  
N. M. BELFIORE ◽  
C. MORITZ

2014 ◽  
Vol 9 (3) ◽  
pp. 360-371 ◽  
Author(s):  
Weiguo DU ◽  
Travis R. ROBBINS ◽  
Daniel A. WARNER ◽  
Tracy LANGKILDE ◽  
Richard SHINE

1983 ◽  
Vol 38 (11) ◽  
pp. 1369-1374 ◽  
Author(s):  
R. Dieter Fischer ◽  
Kenan Yünlü

Both the acceptedly oligomeric complex [(C5H5)3U(μ-NCBH3)]n (1) and its hitherto unknown, appreciably more soluble and volatile homologue, [(CH3C5H4)3U(μ-NCBH3)]n (2), display NIR/VIS spectra typical of trigonal bipyramidal (tbp) metal coordination in the solid state, but of pseudotetrahedral (ψ-Td) coordination e.g. in CH2CI2 and C6H5CH3 solution. The 1H NMR spectra of 2 in these non coordinating solvents can be best explained in terms of temperature dependent equilibria involving the two rapidly interconverting ψ-Td-isomers (CH3C5H4)3U(η3-H3BCN) and (CH3C5H4)3UNCBH3. A reversible colour change: green ⇋ brown at 130-150 °C also suggests the facile rupture of U-H and U-N bonds, respectively, in thermally excited, polycrystalline (2).


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