Results 71 to 80 of about 3,468 (208)

Melanin photosensitization and the effect of visible light on epithelial cells. [PDF]

PLoS ONE, 2014
Protecting human skin from sun exposure is a complex issue that involves unclear aspects of the interaction between light and tissue. A persistent misconception is that visible light is safe for the skin, although several lines of evidence suggest ...
Orlando Chiarelli-Neto, Alan Silva Ferreira, Waleska Kerllen Martins, Christiane Pavani, Divinomar Severino, Fernanda Faião-Flores, Silvya Stuchi Maria-Engler, Eduardo Aliprandini, Glaucia R Martinez, Paolo Di Mascio, Marisa H G Medeiros, Maurício S Baptista   +11 more
doaj   +1 more source

Influence of MC1R Gene Variants on Coat Color of Indicine Cattle Breeds

Animal Genetics, Volume 57, Issue 3, June 2026.
ABSTRACT Indicine cattle display a broad range of coat colors, representing a relevant and breed‐defining trait required for registration in breeder association. Among the genes involved in pigmentation, MC1R stands out for modulating the synthesis of melanin‐related proteins and remains poorly explored in indicine cattle breeds. Therefore, we aimed to
Silel V. S. A. Maciel, Ingrid P. P. Oliveira, Beatriz B. Senes, Carolaine J. S. Santana, Jackeline S. Alves, Edilane A. da Silva, Fernando O. Franco, Bárbara C. F. da Silva, Fernando C. Cairo, Frederico C. Cairo, Aníbal E. Vercesi‐Filho, Raphael B. Costa, Gregório M. F. de Camargo   +12 more
wiley   +1 more source

Products of eumelanin and pheomelanin generated by alkaline oxidation.

, 2019
Products of eumelanin and pheomelanin generated by alkaline oxidation.
Klaus Wolkenstein (1367886), Susanne Affenzeller (5698157), Tobias Licha (160953), Holm Frauendorf (821261), Daniel J. Jackson (7513151)   +4 more
core   +1 more source

ASIP Variants in Livestock: It's Not Black and White

Animal Genetics, Volume 57, Issue 3, June 2026.
ABSTRACT Fur and feather pigmentation play an important role in the survival and reproduction of many species, as well as in selective breeding and agriculture. The synthesis of pigment molecules, eumelanin and pheomelanin, is partially regulated by the agouti signalling protein (ASIP) encoded by the ASIP gene.
Isabella M. Brown, Kylie A. Munyard
wiley   +1 more source

Absorbance spectra of pheomelanin (red) and eumelanin (brown).

, 2022
The correct synthesis of the pigment was confirmed by UV-Vis spectroscopy. Indeed, the process was monitored through the evolution of the absorbance spectrum until the absorbance peak of L-DOPA disappears (around 12 h).
María Antonieta Fernández-Herrera (12231646), Denisse Fuentes-López (12231640), Hilda Mercado-Uribe (815520), Daniel Ortega-Zambrano (12231643)   +3 more
core   +1 more source

Morphological properties of hair and their variation when subjected to oxidation via chemical bleaching

Fields, 2020
Four key morphological properties of hair were investigated in order to understand their variation in response to oxidation of the strand via bleaching. These were hair diameter, cuticle damage, porosity and fluorescence.
Raeesah Ismat Saddiq
doaj   +2 more sources

Evolutionary Origin of Ocular Melanoma: Associations With rs12913832 G Allele Frequency and Latitude

Cancer Medicine, Volume 15, Issue 6, June 2026.
The rs12913832 derived (G) allele frequency (blue‐eye allele) was a markedly stronger predictor of ocular melanoma incidence than geographic latitude, with approximately 92% of the latitude effect mediated through allele frequency. These findings indicate that pigmentation‐related genetic variation contributes substantially to global differences in ...
Hans Witzenhausen, Hildur Helgadottir, Veronica Höiom, Roger Olofsson Bagge, Gustav Stålhammar   +4 more
wiley   +1 more source

In Vivo and In Vitro Evaluation of PTeCA (1H‐Pyrrole‐2,3,4,5‐Tetracarboxylic Acid) in Hair Matrix as a Marker for Oxidative Cosmetic Treatment

Drug Testing and Analysis, Volume 18, Issue 6, Page 739-749, June 2026.
A total of 3378 self‐reported treated and untreated hair samples were analyzed for PTCA and PTeCA by LC‐MS/MS. Moreover, their in vitro formation was assessed in 225 untreated hair by different cosmetic treatments with and without oxidative agents. Data suggest that PTeCA could be a reliable marker for oxidative cosmetic treatments in hair.
Sara Casati, Alessandro Ravelli, Roberta F. Bergamaschi, Agata Magliocco, Sofia Vanerio, Gabriella Roda, Paola Rota, Marica Orioli, Alessio Battistini   +8 more
wiley   +1 more source

Quantitative variation of melanins in alpaca (Lama pacos L.)

Italian Journal of Animal Science, 2011
The amount of melanin pigments was investigated in 95 Peruvian alpaca, representative of six different fleece colours, by means of spectrophotometric assays: SpEM (Spectrophoto­metric Eumelanin), SpPM (Spectrophotometric Pheomelanin), SpASM ...
Marco Antonini, Carlo Renieri, Martin Gonzales, Paolo Passamonti, Alessandro Valbonesi, Teresa Cecchi   +5 more
doaj   +1 more source

Interaction between the melanocortin 1 receptor (MC1R) and agouti signalling protein genes (ASIP), and their association with black and brown coat colour phenotypes in peruvian alpaca

Italian Journal of Animal Science, 2020
The aim of this work was to assess the interaction between MC1R and ASIP genes in determining coat colour variation in black and brown Peruvian alpacas. Skin biopsies were collected from 25 black alpacas and 15 brown alpacas.
Stefano Pallotti, Bathrachalam Chandramohan, Dario Pediconi, Cristina Nocelli, Antonietta La Terza, Carlo Renieri   +5 more
doaj   +1 more source