Results 31 to 40 of about 148,924 (212)

The influence of amino and hydroxyl of chitosan on hydroxyl radical scavenging activity

open access: yes, 2009
In order to determine the effect of the amido and hydroxyl of chitosan on antioxidant activity, a series of N-deacetylated chitosan with a degree of deacetylation (D.D.) ranging from 45% to 95% were prepared using region selective N-acetylation of ...
Xue,Qinzhao   +11 more
core   +1 more source

Photochemistry of the Cloud Aqueous Phase: A Review

open access: yesMolecules, 2020
This review paper describes briefly the cloud aqueous phase composition and deeply its reactivity in the dark and mainly under solar radiation. The role of the main oxidants (hydrogen peroxide, nitrate radical, and hydroxyl radical) is presented with a ...
Angelica Bianco   +3 more
doaj   +1 more source

Inactivation of Salmonella Enteritidis on Hatchery and Table Eggs Using a Gas-phase Hydroxyl-Radical Process

open access: yesJournal of Food Protection, 2023
Eggs represent a significant vehicle for Salmonella Enteritidis with the pathogen being transferred to chicks in the hatchery, or to consumers via table eggs.
Brenda Zai   +7 more
doaj   +1 more source

Antioxidant activitiy of Lactobacillus plantarum , Lactobacillus sake and Lactobacillus curvatus strains isolated from fermented Turkish Sucuk [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2020
In recent years, it is very important to find more safe and natural antioxidants than biological sources to replace synthetic antioxidants. The antioxidant properties of 22 lactic acid bacteria were investigated in vitro in the present study.
MÜRÜVVET DÜZ   +2 more
doaj   +1 more source

Molecular structural mechanism of coal photo-oxidative hydroxyl radical generation regulated by pre-oxidation temperature

open access: yesMeitan xuebao
During coal storage and open-air stockpiling, photooxidation is the key precursor step triggering spontaneous combustion. However, the molecular structural regulation mechanism of the pre-oxidizing temperature on the generation of hydroxyl radicals—the ...
Yanni ZHANG   +4 more
doaj   +1 more source

Synthesis of lignin based composites of TiO2 for potential application as radical scavengers in sunscreen formulation

open access: yesBMC Chemistry, 2019
Titanium dioxide (TiO2) is added in sunscreens due to its ability to absorb ultraviolet (UV) light. However, upon irradiation of UV light, reactive oxygen species particularly hydroxyl radical which can damage human skin will be generated. In this study,
Mohamad Nasir Mohamad Ibrahim   +4 more
doaj   +1 more source

Hydroxyl radical reactivity at the air-ice interface [PDF]

open access: yesAtmospheric Chemistry and Physics, 2010
Hydroxyl radicals are important oxidants in the atmosphere and in natural waters. They are also expected to be important in snow and ice, but their reactivity has not been widely studied in frozen aqueous solution. We have developed a spectroscopic probe
T. F. Kahan, R. Zhao, D. J. Donaldson
doaj  

Role of Hydroxyl Radical in Degradation of NTO: DFT Study

open access: yes, 2023
Hydroxyl radicals are important reactive oxygen species produced in the aquatic environment under sunlight irradiation. Many organic pollutants may be decomposed as they encounter hydroxyl radicals, due to their high oxidative ability. NTO (5-nitro-1,2,4-
Leonid Gorb (1514851)   +2 more
core   +1 more source

Universality of hydroxyl radical generation in irradiated nanoenhancer suspensions: Vital role of concentration

open access: yesAIP Advances
Concentration plays an essential role in generating hydroxyl radicals in irradiated nanoenhancer suspensions. In this paper, we used coumarin-3-carboxylic acid as a hydroxyl radical-specific probe to investigate the hydroxyl radical production of ...
Changfeng Yang   +5 more
doaj   +1 more source

Inhibitory Effect and Mechanism of Scutellarein on Melanogenesis

open access: yesCosmetics, 2021
Fairer skin is preferred in many Asian countries and there is a high demand for skin whitening and lightening products. However, in recent years, problems related to the safety of using whitening agents have emerged.
Liyun Dai, Lihao Gu, Kazuhisa Maeda
doaj   +1 more source

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