Results 141 to 150 of about 871 (169)
Some of the next articles are maybe not open access.
Cephalopod coloration model I Squid chromatophores and iridophores
Journal of the Optical Society of America A, 2008We have developed a mathematical model of skin coloration in cephalopods, a class of aquatic animals. Cephalopods utilize neurological and physiological control of various skin components to achieve active camouflage and communication. Specific physical processes of this coloration are identified and modeled, utilizing available biological materials ...
Richard L, Sutherland +4 more
openaire +2 more sources
Guanine and hypoxanthine formation in iridophores of the bullfrog tadpole.
Biochimica et biophysica acta, 1972Abstract 1. 1. The mechanism of guanine and hypoxanthine formation in iridophores was studied using the ventral skin of bullfrog tadpoles. 2. 2. Incubation mixtures containing skin extract, guanosine or deoxyguanosine and inorganic phosphate yielded guanine, and incubation mixtures containing inosine or adenosine, instead of guanosine or ...
H, Ide, T, Hama
openaire +3 more sources
Guanine formation in isolated iridophores from bullfrog tadpoles
Biochimica et Biophysica Acta (BBA) - General Subjects, 1972Iridophores were isolated from the peritoneum of bullfrog tadpoles by the method of trypsin digestion followed by Ficoll density gradient centrifugation. Guanine and hypoxanthine were found in the isolated iridophores. The incorporation of the label of [3H]guanosine into guanine was demonstrated using the isolated iridophores.
H, Ide, T, Hama
openaire +2 more sources
The effects of intermedin on the ultrastructure of amphibian iridophores
General and Comparative Endocrinology, 1969The ultrastructure and pigment composition of untreated and intermedin-treated integumental iridophores of three species of amphibians, Hyla cinerea, H. arenicolor, and Agalychnis dachnicolor, were examined by electron microscopy and by purine analysis.
openaire +2 more sources
Electrowetting-controlled bio-inspired artificial iridophores
SPIE Proceedings, 2011Many marine organisms have evolved complex optical mechanisms of dynamic skin color control that allow them to drastically change their visual appearance. In particular, cephalopods have developed especially effective dynamic color control mechanism based on the mechanical actuation of the micro-scale optical structures, which produce either ...
Supone Manakasettharn +2 more
openaire +1 more source
Leucophores and iridophores of Fundulus heteroclitus: Biophysical and ultrastructural properties
Journal of Morphology, 1979AbstractClassical light microscopic studies on pigmentation of Fundulus heteroclitus (killifish) indicated that there are three groups of light reflecting cells; one group on the surface of scales reflects white light, while two other deeper groups (the melaniridophores and the stratum argenteum) are iridescent. The results presented here show that: (1)
David G, Menter +3 more
openaire +2 more sources
The Iridophores of the Echinoid Diadema antillarum
Journal of Cell Science, 1961ABSTRACT The blue pattern seen when the skin of Diadema antillarum is viewed by reflected light is due to iridophores. The quality of their blueness varies with the background provided by neighbouring chromatophores. Microdissection reveals that they consist of gelatinous plates contained in a fibrous and cellular capsule.
Norman Millott, Brenda M. Manly
openaire +1 more source
Ultrastructure of the skin melanophores and iridophores in paddlefish, Polyodon spathula
Micron, 2007The ultrastructure of melanophores and iridophores of Polyodon spathula has been examined by transmission electron microscopy. In the skin, two types of chromatophores, melanophores and iridophores were founded. Melanophores were localized both in epidermis and dermis.
openaire +2 more sources
Benign dermal iridophore aggregates in a crested gecko (Correlophus ciliatus)
Journal of Exotic Pet Medicine, 2020Abstract A 1-year-old, female intact crested gecko was evaluated because of skin discoloration on her ventrum. Full-thickness biopsies were taken and evaluated histologically. Multifocally and regularly, there were collections of birefringent, granular material, localized primarily to the most superficial dermis subjacent to the overlying epithelium,
Tess Rooney +2 more
openaire +1 more source
Polarization Reflecting Iridophores in the Arms of the SquidLoligo pealeii
The Biological Bulletin, 200185: 1185–1196. 12. Yang, X.-L., L. Ping, T. Lu, Y. Shen, and M.-H. Han. 2001. Prog. Brain Res. 131: 277–293. 13. Schmidt, K.-F. 1999. Neurosci. Lett. 262: 109–112. 14. Shen, Y., and X.-L. Yang. 1999. Neurosci. Lett. 259: 177–180. 15. McMahon, D. G., D.-Q. Shang, L. Ponomareva, and T. Wagner. 2001. Prog. Brain Res. 131: 419–436. 16. Dowling, J.
N, Shashar +5 more
openaire +2 more sources