scholarly journals Spectral tuning of Amazon parrot feather coloration by psittacofulvin pigments and spongy structures

2013 ◽  
Vol 216 (23) ◽  
pp. 4358-4364 ◽  
Author(s):  
J. Tinbergen ◽  
B. D. Wilts ◽  
D. G. Stavenga
Keyword(s):  
Spectral Tuning ◽  
Feather Coloration ◽  
Parrot Feather

Spectral tuning of double resonant nanolaminate plasmonic nanoantennas with a fixed size

2021 ◽  
Vol 118 (24) ◽  
pp. 241108
Author(s):  
E. Mejia ◽  
Y. Qian ◽  
S. A. Safiabadi Tali ◽  
J. Song ◽  
W. Zhou
Keyword(s):  
Spectral Tuning ◽  
Fixed Size ◽  
Plasmonic Nanoantennas

scholarly journals Reflections on iridescent neck and breast feathers of the peacock, Pavo cristatus

2018 ◽  
Vol 9 (1) ◽  
pp. 20180043 ◽  
Author(s):  
Pascal Freyer ◽  
Bodo D. Wilts ◽  
Doekele G. Stavenga
Keyword(s):  
Three Dimensional ◽  
Refractive Indices ◽  
Rectangular Lattice ◽  
Pavo Cristatus ◽  
Feather Coloration ◽  
Air Channels ◽  
Difference Time ◽  
Modelling Methods ◽  
Reflection Characteristics ◽  
Reflectance Measurements

The blue neck and breast feathers of the peacock are structurally coloured due to an intricate photonic crystal structure in the barbules consisting of a two-dimensionally ordered rectangular lattice of melanosomes (melanin rodlets) and air channels embedded in a keratin matrix. We here investigate the feather coloration by performing microspectrophotometry, imaging scatterometry and angle-dependent reflectance measurements. Using previously determined wavelength-dependent refractive indices of melanin and keratin, we interpret the spectral and spatial reflection characteristics by comparing the measured spectra to calculated spectra by effective-medium multilayer and full three-dimensional finite-difference time-domain modelling. Both modelling methods yield similar reflectance spectra indicating that simple multilayer modelling is adequate for a direct understanding of the brilliant coloration of peacock feathers.

scholarly journals The molecular mechanisms of light adaption in light-harvesting complexes of purple bacteria revealed by a multiscale modeling

2019 ◽  
Vol 10 (42) ◽  
pp. 9650-9662 ◽  
Author(s):  
Felipe Cardoso Ramos ◽  
Michele Nottoli ◽  
Lorenzo Cupellini ◽  
Benedetta Mennucci
Keyword(s):  
Multiscale Modeling ◽  
Molecular Mechanisms ◽  
Light Harvesting ◽  
Purple Bacteria ◽  
Spectral Tuning ◽  
Light Harvesting Complexes

The spectral tuning of LH2 antenna complexes arises from H-bonding, acetyl torsion, and inter-chromophore couplings.

Spectral Tuning in the Human Blue Cone Pigment†

Biochemistry ◽  
1999 ◽  
Vol 38 (36) ◽  
pp. 11593-11596 ◽  
Author(s):  
Jeffry I. Fasick ◽  
Ning Lee ◽  
Daniel D. Oprian
Keyword(s):  
Spectral Tuning ◽  
Cone Pigment

scholarly journals Hydrophobic Residues near the Bilin Chromophore-Binding Pocket Modulate Spectral Tuning of Insert-Cys Subfamily Cyanobacteriochromes

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Sung Mi Cho ◽  
Sae Chae Jeoung ◽  
Ji-Young Song ◽  
Ji-Joon Song ◽  
Youn-Il Park
Keyword(s):  
Binding Pocket ◽  
Spectral Tuning ◽  
Hydrophobic Residues
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