Results 61 to 70 of about 3,468 (208)

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

open access: yesInsect 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   +9 more
wiley   +1 more source

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

open access: yesFrontiers in Chemistry, 2019
Melanin denotes a variety of mammalian pigments, including the dark electrically conductive eumelanin and the reddish, sulfur-containing, pheomelanin.
Ludovico Migliaccio   +7 more
doaj   +1 more source

Could eumelanin molecule from Streptomyces parvus BSB49 strain be a potential anticancer agent for lung cancer?

open access: yesMedicine Science, 2023
Melanins, which are divided into five different subgroups as eumelanin, pheomelanin, allomelanin, neuromelanin and pyomelanin, are a heterogeneous and amorphous biopolymer family.
Hamit Emre Kizil   +3 more
doaj   +1 more source

Hair Degradation Patterns in Aquatic and Soil Environments

open access: yesArchaeometry, 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   +3 more
wiley   +1 more source

Probing pheomelanin synthesis using thioflavin T fluorescence [PDF]

open access: yes, 2019
The fluorescent rotor probe thioflavin T (ThT) is used to investigate the presence of sheet structures in pheomelanin by studying the formation and disassembly of pheomelanin synthesized from L-cysteine, L-DOPA and the enzyme tyrosinase.
Birch, David, Davy, Alastair Douglas
core  

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

open access: yesFrontiers 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   +3 more
doaj   +1 more source

Probing Near-Infrared Photorelaxation Pathways in Eumelanins and Pheomelanins [PDF]

open access: yesThe Journal of Physical Chemistry A, 2010
Ultraviolet-visible spectroscopy readily discerns the two types of melanin pigments (eumelanin and pheomelanin), although fundamental details regarding the optical properties and pigment heterogeneity are more difficult to disentangle via analysis of the broad featureless absorption spectrum alone.
Piletic, Ivan R   +2 more
openaire   +2 more sources

Setmelanotide in Bardet‐Biedl Syndrome: A Case Report

open access: yesPediatric 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   +2 more
wiley   +1 more source

Prevalence and Grade of Patellar Luxation in Cavalier King Charles Spaniels Attending Primary‐Care Veterinary Practices in Australia

open access: yesVeterinary Medicine and Science, Volume 12, Issue 4, July 2026.
Patella luxation was prevalent in Cavalier King Charles Spaniels attending Australian veterinary practices. Dogs which were younger, neutered, above the breed standard weight, and with ruby‐coloured coats were at increased risk, while dogs with bilateral luxation were more likely to be diagnosed with higher grade luxation .
Yaeji Son   +3 more
wiley   +1 more source

Melanogenesis: A Search for Pheomelanin and Also, What Is Lurking Behind Those Dark Colors?

open access: yes, 2019
We investigated the synthesis of melanin-like materials from DOPA, dopamine, norepinephrine and epinephrine in the presence of L-cysteine. We observed that L-cysteine delayed the formation of pigment from these catecholamines and that the presence of L ...
Venise, Govan, Koen, Vercruysse
core   +1 more source

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