Results 31 to 40 of about 9,564 (223)

Variação intraespecífica da cor da pelagem de uma espécie de pequeno roedor sul-americano [PDF]

open access: yes, 2016
Intra-specific color variation is often underestimated by researchers, and among mammalian species, intra-specific differences in coloration are poorly documented for most species.
Barquez, Ruben Marcos   +3 more
core   +2 more sources

Quantitative Fluorescence Excitation Spectra of Synthetic Eumelanin [PDF]

open access: yesThe Journal of Physical Chemistry B, 2005
Previously reported excitation spectra for eumelanin are sparse and inconsistent. Moreover, these studies have failed to account for probe beam attenuation and emission reabsorption within the samples, making them qualitative at best. We report for the first time quantitative excitation spectra for synthetic eumelanin, acquired for a range of solution ...
Nighswander-Rempel, S. P.   +4 more
openaire   +5 more sources

An electrochemical study of natural and chemically controlled eumelanin

open access: yesAPL Materials, 2017
Eumelanin is the most common form of the pigment melanin in the human body, with functions including antioxidant behavior, metal chelation, and free radical scavenging. This biopigment is of interest for biologically derived batteries and supercapacitors.
Ri Xu   +5 more
doaj   +1 more source

Following the excited state relaxation dynamics of indole and 5-hydroxyindole using time-resolved photoelectron spectroscopy [PDF]

open access: yes, 2011
Time-resolved photoelectron spectroscopy was used to obtain new information about the dynamics of electronic relaxation in gas-phase indole and 5-hydroxyindole following UV excitation with femtosecond laser pulses centred at 249 nm and 273 nm.
Albert Stolow   +8 more
core   +1 more source

Radioactivity to Rethink the Earth's Energy Balance

open access: yesGlobal Challenges, 2021
This contribution invites to re‐examine the whole matter of radioactivity, reconsidering it from the point of view of a realistic source of energy. State‐of‐the‐art and technical aspects are briefly illustrated in this note that aims to open a discussion
Maria Letizia Terranova
doaj   +1 more source

Bioactive Composite Methacrylated Gellan Gum for 3D-Printed Bone Tissue-Engineered Scaffolds

open access: yesNanomaterials, 2023
Gellan gum (GG) was chemically modified with methacrylic moieties to produce a photocrosslinkable biomaterial ink, hereinafter called methacrylated GG (GGMA), with improved physico-chemical properties, mechanical behavior and stability under ...
Ugo D’Amora   +10 more
doaj   +1 more source

Antimicrobial peptides: agents of border protection for companion animals. [PDF]

open access: yes, 2012
Over the past 20 years, there have been significant inroads into understanding the roles of antimicrobial peptides in homeostatic functions and their involvement in disease pathogenesis.
Affolter, Verena K   +2 more
core   +1 more source

Characterisation of eumelanin-chitosan films [PDF]

open access: yesActa Horticulturae, 2018
Food packaging films based on chitosan (1%, w/v) were developed by optimising chitosan thin films with different concentrations of eumelanin 0, 0.05, 0.1, 0.2 and 0.4% respectively. The properties of eumelanin-chitosan (EU-Ch) films, including colour, water contact angle, mechanical properties, degradation ratio, moisture content (MC), and total ...
Jaitrong, S.   +4 more
openaire   +2 more sources

Metabolic Basis and Clinical Evidence for Skin Lightening Effects of Thiol Compounds

open access: yesAntioxidants, 2022
Melanin pigment is a major factor in determining the color of the skin, and its abnormal increase or decrease can cause serious pigmentation disorders.
Yong Chool Boo
doaj   +1 more source

Photo-damage, photo-protection and age-related macular degeneration [PDF]

open access: yes, 2015
Age-related macular degeneration (AMD) is a degenerative retinal disease that causes blindness in people 60-65 years and older, with the highest prevalence appearing in people 90 years-old or more.
Marquioni Ramella, Melisa Daniela   +1 more
core   +1 more source

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