Results 51 to 60 of about 2,749 (174)

Sexual dimorphism in melanin pigmentation, feather coloration and its heritability in the barn swallow (Hirundo rustica). [PDF]

PLoS ONE, 2013
Melanin is the main pigment in animal coloration and considerable variation in the concentrations of the two melanin forms (pheo- and eumlanin) in pigmented tissues exists among populations and individuals.
Nicola Saino, Maria Romano, Diego Rubolini, Celine Teplitsky, Roberto Ambrosini, Manuela Caprioli, Luca Canova, Kazumasa Wakamatsu   +7 more
doaj   +1 more source

Comparative study of the physical parameters of melanosomes in hair of different colour varieties of Mustela putorius furo

The European Zoological Journal
Animal coat colour is determined by various factors, including the type of pigment, its quantity, the shape of pigment cells, and their distribution throughout the body.
D. Grabolus, P. Wacławik, M. Zatoń-Dobrowolska, H. Wierzbicki   +3 more
doaj   +1 more source

Genetic and phenotypic variation in wood tiger moths from the Caucasus: insights into male warning color variation

Insect Science, EarlyView.
Coloration serves several fitness‐related functions, including thermoregulation, immunity, social signaling, sexual selection, and predator avoidance. Consequently, color polymorphism can have a significant impact on a species’ interactions with its environment, including its relationships with predators, prey, and potential mates. The wood tiger moth (
Juan A. Galarza, Ossi Nokelainen, Melanie N. Brien, Cristina Ottocento, Bibiana Rojas, Janne K. Valkonen, Tamar Chunashvili, Tõnis Tasane, Chris D. Jiggins, Johanna Mappes   +9 more
wiley   +1 more source

Pheomelanin as well as Eumelanin Is Present in Human Epidermis

Journal of Investigative Dermatology, 1991
There are two types of melanin in mammals, the brownish black eumelanin and the reddish yellow pheomelanin. Eumelanin and pheomelanin are present in human hair and this study was carried out to see whether both pigments are also present in human epidermis.
Thody, Anthony J, Higgins, Elisabeth M, Wakamatsu, Kazumasa, Ito, Shosuke, Burchill, Susan A, Marks, Janet M   +5 more
openaire   +2 more sources

Hair Degradation Patterns in Aquatic and Soil Environments

Archaeometry, EarlyView.
ABSTRACT Hair is a biological material that can provide information in archaeology and forensics. Previous studies have mainly examined changes occurring post‐mortem. In this study, we focused on hair pulled out ante‐mortem. The aim of the study was to identify patterns in the degradation of hair in water and soil.
Katarzyna Palacz‐Ziółek, Monika Krzyżanowska, Rafał Ogórek, Marcin Kadej   +3 more
wiley   +1 more source

Quantitation of eumelanin and pheomelanin markers in diverse biological samples by HPLC-UV-MS following solid-phase extraction.

PLoS ONE, 2019
Eumelanin and pheomelanin are well known and common pigments found in nature. However, their complex polymer structure and high thermostability complicate their direct chemical identification.
Susanne Affenzeller, Holm Frauendorf, Tobias Licha, Daniel J Jackson, Klaus Wolkenstein   +4 more
doaj   +1 more source

Bridging the gap between consumer perception and objective measurements: A novel multiview image analysis methodology for quantifying hair volume on a human head (curl type I to III)

International Journal of Cosmetic Science, EarlyView.
Quantifying 3D hair volume on a human head remains highly subjective. We present a robust automated image analysis methodology based on comprehensive consumer perception. This approach translates multidimensional attributes into objective measurements, highly predictive of sensory and consumer evaluations. We now have a rigorous and accurate metric for
Margalith Harrar, Chloé Six, Paola Littaye, Sylviane Delcourt, Irène Dubois, Séverine Jelidi, Florence Pouradier   +6 more
wiley   +1 more source

Setmelanotide in Bardet‐Biedl Syndrome: A Case Report

Pediatric Dermatology, EarlyView.
ABSTRACT Setmelanotide is a melanocortin‐4‐receptor agonist used for the treatment of hyperphagia in the genetic obesity syndrome Bardet‐Biedl. Presented is a case of diffuse hyperpigmentation in a patient treated with setmelanotide, which represents the most common side effect of this medication.
Shelby Smith, Eric Sanfilippo, Lara Wine Lee   +2 more
wiley   +1 more source

Eumelanin and pheomelanin pigmentation in mollusc shells may be less common than expected: insights from mass spectrometry

Frontiers in Zoology, 2019
Background The geometric patterns that adorn the shells of many phylogenetically disparate molluscan species are comprised of pigments that span the visible spectrum.
Susanne Affenzeller, Klaus Wolkenstein, Holm Frauendorf, Daniel J. Jackson   +3 more
doaj   +1 more source

Evidence of Unprecedented High Electronic Conductivity in Mammalian Pigment Based Eumelanin Thin Films After Thermal Annealing in Vacuum

Frontiers in Chemistry, 2019
Melanin denotes a variety of mammalian pigments, including the dark electrically conductive eumelanin and the reddish, sulfur-containing, pheomelanin.
Ludovico Migliaccio, Paola Manini, Davide Altamura, Cinzia Giannini, Paolo Tassini, Maria Grazia Maglione, Carla Minarini, Alessandro Pezzella   +7 more
doaj   +1 more source