Results 51 to 60 of about 7,034 (200)

Improved HPLC Conditions to Determine Eumelanin and Pheomelanin Contents in Biological Samples Using an Ion Pair Reagent

open access: yesInternational Journal of Molecular Sciences, 2020
Alkaline hydrogen peroxide oxidation (AHPO) of eumelanin and pheomelanin, two major classes of melanin pigments, affords pyrrole-2,3,5-tricarboxylic acid (PTCA), pyrrole-2,3-dicarboxylic acid (PDCA) and pyrrole-2,3,4,5-tetracarboxylic acid (PTeCA) from ...
S. Ito   +3 more
semanticscholar   +1 more source

Bacterial Pigments as Potential Antitumor Agents Against Gastrointestinal Cancers: A Comprehensive Systematic Review

open access: yesBiotechnology and Applied Biochemistry, EarlyView.
ABSTRACT Gastrointestinal cancers (GICs) constitute one of the leading causes of cancer‐related morbidity and mortality worldwide. Despite currently available therapeutic strategies, new approaches and procedures are needed for their prevention and treatment.
Raúl Vergara   +5 more
wiley   +1 more source

High‐Performance Solar‐Thermal Hydrogel Based on Waste Biomass Materials for Power Generation and Water Purification

open access: yesEcoEnergy, EarlyView.
An environmentally friendly and highly efficient solar evaporator was constructed using waste biomass materials and polyvinyl alcohol carrier, which achieves an outstanding evaporation rate of 1.48 kg m−2 h−1, corresponding to an energy conversion efficiency of 82.49% under 1.0 kW m−2 simulated sunlight irradiation.
Shuo Qi   +10 more
wiley   +1 more source

Exploring the optical properties of metal-modified melanin following ultraviolet irradiation: An experimental and theoretical study using density functional theory

open access: yesHeliyon
Melanin has an important function to protect humans from sunlight because of its broad spectrum of light absorption. This characteristic varies according to the nature of absorption and the amount of melanin manufactured.
Nawal Madkhali, Saja Algessair
doaj   +1 more source

The macroecology of immunity: predominant influence of climate on invertebrate immune response

open access: yesEcography, EarlyView.
The immune system is the primary defense against parasites. With the ever‐increasing rate of disease, epidemiologic models considering geographic variation in immune responses could prove useful. Despite increasing interest in the macroecology of parasitism and infectious diseases, we know little about the macroecology of immune responses (i.e ...
Adam Z. Hasik   +9 more
wiley   +1 more source

Substantial Effect of Melanin Influencing Factors on Melanogenesis in Muzzle Melanocytes of Differently Colored Hanwoo [PDF]

open access: yesAsian-Australasian Journal of Animal Sciences, 2012
The present study was designed to investigate the effect of α-melanocyte-stimulating hormone (α-MSH), nitric oxide (NO) and L-cysteine on melanin production and expression of related genes MC1R, Tyr, Tyrp-1 and Tyrp-2 in muzzle melanocytes of differently
Touseef Amna   +6 more
doaj   +1 more source

Comparative Evaluation of R134a and HFO‐1234ze Cryogen Spray Cooling Using a Mouse Model With Controllable Epidermal Pigmentation

open access: yesLasers in Surgery and Medicine, EarlyView.
ABSTRACT Objectives Cryogen spray cooling (CSC) is critical for protecting the epidermis during laser dermatologic procedures. The widely used cryogen, R134a, has a high global warming potential (GWP), motivating interest in environmentally favorable alternatives such as HFO‐1234ze.
Wangcun Jia   +13 more
wiley   +1 more source

The Redox Properties of Polyphenols and Their Role in ROS Generation for Biomedical Applications

open access: yesAngewandte Chemie, Volume 138, Issue 3, 16 January 2026.
The dual redox nature of polyphenols enables antioxidant activity and controlled reactive oxygen species (ROS) generation. This review details the biomedical applications of polyphenols in materials such as nanoparticles, coatings, and hydrogels for antimicrobial, tissue regeneration, and cancer therapies.
Jose Bolaños‐Cardet   +7 more
wiley   +2 more sources

Aspacochioside C from Asparagus cochinchinensis attenuates eumelanin synthesis via inhibition of TRP2 expression

open access: yesScientific Reports, 2023
Aspacochioside C (ACC) is a steroidal saponin isolated from Asparagus cochinchinensis. Steroidal saponins, such as pseudoprotodioscin and dioscin, are known to inhibit melanogenesis, but the role of ACC in melanogenesis remains unknown.
Silvia Yunmam   +7 more
doaj   +1 more source

Label-Free Delineation of Human Uveal Melanoma Infiltration With Pump–Probe Microscopy

open access: yesFrontiers in Oncology, 2022
Uveal melanoma (UM) is the most frequent primary intraocular malignancy in adults, characterized by melanin depositions in melanocytes located in the uveal tract in the eyes.
Bohan Zhang   +9 more
doaj   +1 more source

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