Results 11 to 20 of about 268,094 (306)

Trends in atmospheric methane concentrations since 1990 were driven and modified by anthropogenic emissions

open access: yesCommunications Earth & Environment, 2023
The atmospheric methane trend is not fully understood. Here we investigate the role of the main sink, the main natural source, and anthropogenic emissions on the methane growth rate over the last three decades using numerical models and emission ...
Ragnhild Bieltvedt Skeie   +2 more
doaj   +1 more source

Radical Chemistry in a Femtosecond Laser Plasma: Photochemical Reduction of Ag+ in Liquid Ammonia Solution [PDF]

open access: yes, 2018
Plasmas with dense concentrations of reactive species such as hydrated electrons and hydroxyl radicals are generated from focusing intense femtosecond laser pulses into aqueous media. These radical species can reduce metal ions such as Au3+ to form metal
Ahsan, Syeda   +4 more
core   +3 more sources

Design of a two-dimensional interplanar heterojunction for catalytic cancer therapy

open access: yesNature Communications, 2022
Chemodynamic therapy relies on Fenton or Fenton-like reactions to produce hydroxyl radical in the tumor region. Here the authors design a two-dimensional interplanar heterojunction with in situ hydroxyl radical generation under ultrasound irradiation ...
Yong Kang   +7 more
doaj   +1 more source

Study on Hydroxyl Radical Scavenging Ability of Fermented Kelp Waste

open access: yesChemical Engineering Transactions, 2016
In order to develop a new pathway to scavenge hydroxyl radical and to utilize kelp waste, edible-medicinal fungi was fermented in medium mainly composed of kelp waste, and the products from fermentation were investigated with hydroxyl radical scavenging ...
Y. Zhuang, P.S. Yan
doaj   +1 more source

Photoinduced degradation of three azole compounds from 3rd EU watchlist monitored by high-resolution higher-order mass spectrometry – Part I: A mechanistic study

open access: yesEnvironmental Advances, 2022
Pesticides are found in water bodies worldwide. Among them, there are azoles which are used as fungizides. Hence, tebuconazole, imazalil and penconazole have been included into the 3rd EU watchlist to survey their presence in water bodies.
Melanie Voigt   +4 more
doaj   +1 more source

Glutathione--hydroxyl radical interaction: a theoretical study on radical recognition process. [PDF]

open access: yesPLoS ONE, 2013
Non-reactive, comparative (2 × 1.2 μs) molecular dynamics simulations were carried out to characterize the interactions between glutathione (GSH, host molecule) and hydroxyl radical (OH(•), guest molecule).
Béla Fiser   +3 more
doaj   +1 more source

Atmospheric chemistry of gas-phase polycyclic aromatic hydrocarbons: formation of atmospheric mutagens. [PDF]

open access: yes, 1994
The atmospheric chemistry of the 2- to 4-ring polycyclic aromatic hydrocarbons (PAH), which exist mainly in the gas phase in the atmosphere, is discussed. The dominant loss process for the gas-phase PAH is by reaction with the hydroxyl radical, resulting
Atkinson R   +8 more
core   +3 more sources

DNA binding hydroxyl radical probes [PDF]

open access: yesRadiation Physics and Chemistry, 2012
The hydroxyl radical is the primary mediator of DNA damage by the indirect effect of ionizing radiation. It is a powerful oxidizing agent produced by the radiolysis of water and is responsible for a significant fraction of the DNA damage associated with ionizing radiation.
Vicky J, Tang   +3 more
openaire   +2 more sources

Protective Mechanism of the Antioxidant Baicalein toward Hydroxyl Radical-Treated Bone Marrow-Derived Mesenchymal Stem Cells

open access: yesMolecules, 2018
Our study explores the antioxidant and cytoprotective effects of baicalein and further discusses the possible mechanisms. A methyl thiazolyl tetrazolium (MTT) assay revealed that baicalein could considerably enhance the viability of hydroxyl radical ...
Yage Tian   +6 more
doaj   +1 more source

Antioxidant activity of mandarin (Citrus reticulata) peel [PDF]

open access: yesActa Periodica Technologica, 2010
Mandarin peel, a waste product coming from juice production, was extracted by conventional extraction with 70% acetone. Content of flavonoids in mandarin peel extract (MPE) was determined by HPLC. Hesperidin was the most dominant flavonoid.
Tumbas Vesna T.   +6 more
doaj   +1 more source

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