Article
Engineering, Environmental
Hongyu Li, Yan An, Xue Luo, Jie Gao, Mingyan Yang, Xinmin Li, Xiaohua Li, Wen Shi, Zeli Yuan, Huimin Ma
Summary: The researchers have developed a near-infrared fluorescence probe CDHQ for studying cell death, which reveals the generation of hydroxyl radicals during this process. This probe can detect trace levels of hydroxyl radicals that cannot be detected by other methods.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Meteorology & Atmospheric Sciences
P. K. Patra, M. C. Krol, R. G. Prinn, M. Takigawa, J. Muhle, S. A. Montzka, S. Lal, Y. Yamashita, S. Naus, N. Chandra, R. F. Weiss, P. B. Krummel, P. J. Fraser, S. O'Doherty, J. W. Elkins
Summary: The study uses observations and simulation models to derive anomalies in the inverse lifetime of CH3CCl3 in the troposphere, revealing that the reaction rate of CH3CCl3 in the atmosphere is influenced by both physical and chemical factors. It explains that the changes in K-G are mainly driven by global variations in OH sources and sinks and chemical effects, showing significant positive trends and year-to-year fluctuations.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Multidisciplinary Sciences
Qindan Zhu, Joshua L. Laughner, Ronald C. Cohen
Summary: The hydroxyl radical (OH) is the most important oxidant on a global and local scale, controlling the removal rate of primary pollutants and triggering the production of ozone. The interannual trends of OH in North American cities show significant variation, with some cities experiencing an increase while others experience a decrease. The variation of OH is linked to the decline of NO2, emphasizing the importance of controlling NOx emissions in regulating ozone pollution in these cities.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Peidong Wang, Susan Solomon, Megan Lickley, Jeffery R. Scott, Ray F. Weiss, Ronald G. Prinn
Summary: Increasing OH suggested by Coupled Model Intercomparison Project Phase 6 models can lead to a 5%-7% underestimation in hydrochlorofluorocarbon (HCFC) and hydrofluorocarbon (HFC) emission estimations in 2005.If there is significant ocean degradation through microbial activity, HCFC, and HFC emissions could be underestimated by up to 10%. Our study suggests an uncertainty in the combined contribution to global warming from HCFCs and HFCs up to 15%-20% in the 2020s.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Xiao-Yuan Lv, Guan-Ping Jin, Ding-Kun Yuan, Yan-Feng Ding, Peng-Xing Long
Summary: Copper hexacyanocobaltate was electro-deposited on amino-graphene-coated indium-tin-oxide glass to form a multifunctional heterogeneous catalyst, which was utilized to establish a novel heterogeneous photo-electro-Fenton-like system capable of generating hydrogen peroxide and hydroxyl radical simultaneously. The system showed high productivity of hydroxyl radicals and efficient degradation of levofloxacin in neutral media.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Meteorology & Atmospheric Sciences
Daun Jeong, Roger Seco, Louisa Emmons, Rebecca Schwantes, Yingjun Liu, Karena A. McKinney, Scot T. Martin, Frank N. Keutsch, Dasa Gu, Alex B. Guenther, Oscar Vega, Julio Tota, Rodrigo A. F. Souza, Stephen R. Springston, Thomas B. Watson, Saewung Kim
Summary: This study presents OH observations in the Amazonas region of Brazil, which showed lower OH concentrations compared to other tropical forest photochemical environments. By using different chemical mechanisms, the study finds that all mechanisms were able to explain the measured OH concentrations within instrumental uncertainty. Further investigations are needed to understand the discrepancies in radical chemistry in the tropical rainforest.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Food Science & Technology
Tomomi Kanno, Shigeaki Nakazawa, Etsuko Harada, Hiromi Kameya, Yoshiaki Miyake, Kazunobu Sato, Takeji Takui, Toshihiko Osawa
Summary: This study used ESR to analyze radical species in different parts of mushrooms and examined their hydroxyl radical scavenging activities. The results showed that different parts of mushrooms contain different metal ions, and different parts of mushrooms exhibit varied hydroxyl radical scavenging activities.
FOOD SCIENCE AND TECHNOLOGY RESEARCH
(2021)
Article
Environmental Sciences
Yury A. Belikov, Olga A. Snytnikova, Vyacheslav P. Grivin, Victor F. Plyusnin, Jing Xu, Feng Wu, Ivan P. Pozdnyakov
Summary: The mechanism of photolysis of the Fe(III) complex with ethylenediamine-N,N '-disuccinic acid ([FeEDDS](-)) was revealed using a combination of time resolved and stationary photochemical methods. The formation of the radical complex of Fe(II) as the primary intermediate was detected and characterized for the first time. The dependence of the quantum yield of photolysis and the hydroxyl radical quantum yield on various factors was also investigated.
Article
Chemistry, Analytical
Ying Chen, Zhiwei Hu, Mingyan Yang, Jie Gao, Junjun Luo, Hongyu Li, Zeli Yuan
Summary: Ferroptosis is an iron-dependent mode of regulated cell death, which has attracted significant research interest due to its potential pathological roles and therapeutic functions. In this study, a dual-functional fluorescence probe Coum-HCy was developed for selective and sequential detection of hydroxyl radical (·OH) and cysteine (Cys). The results showed that ·OH was significantly generated during ferroptosis initiated by erastin or RSL3, while the intracellular Cys level decreased when cells were treated with erastin but remained unaffected by RSL3. This probe may provide valuable insights into the mutual correlation between ·OH and Cys during ferroptosis.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Environmental
Yixin Huang, Jing Zou, Jinbin Lin, Haoyu Yang, Mengyun Wang, Jiawen Li, Wei Cao, Baoling Yuan, Jun Ma
Summary: This study discovers that 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) can serve as both an activator and an electron shuttle to enhance the activation of peroxydisulfate (PDS) and enhance the degradation of diclofenac (DCF). The PDS/ABTS system generates multiple reactive species, with ABTS(center dot+) and (OH)-O-center dot directly contributing to the degradation of DCF. The PDS/ABTS system shows good anti-interference capacity and further improved performance can be achieved by encapsulating ABTS into cellulose.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Guoxian Zhang, Renzhi Hu, Pinhua Xie, Keding Lu, Shengrong Lou, Xiaoyan Liu, Xin Li, Fengyang Wang, Yihui Wang, Xinping Yang, Haotian Cai, Yue Wang, Wenqing Liu
Summary: Atmospheric oxidation is a key factor in complex air pollution, and accurate OH measurement is crucial for understanding the photooxidation mechanism in the troposphere. The AIOFM-LIF instrument developed by the Anhui Institute of Optics Fine Mechanics, Chinese Academy of Sciences, provides high sensitivity and good time resolution for measuring OH concentration. A comparison with the PKU-LIF system showed excellent agreement in measurements.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Suona Zhang, Zhineng Hao, Jingfu Liu, Leo Gutierrez, Jean-Philippe Croue
Summary: This study compared the reactivities of different NOM isolates to hydroxyl radical and sulfate radical, finding that the reaction was influenced by factors such as electron density and molecular size. Certain reactive molecules tended to prefer hydrogen abstraction by hydroxyl radical and decarboxylation by sulfate radical.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Lei Tian, Shan-Shan Liu, Xun-Heng Jiang, Li-Sha Chen, Shao-Lin Wu, Wen-Jun Xiao, Jie-Ping Fan, Dai-She Wu, Jian-Ping Zou
Summary: This study investigates the selective oxidation capacity of coexisting SO4 center dot(-) and center dot OH towards organic moieties with differing electronegativity, shedding light on the degradation pathways of an organic contaminant.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biochemistry & Molecular Biology
Joao Santiago, Jhaison C. de Faria, Miguel San-Miguel, Mario A. Bernal
Summary: Heavy charged particles can cause damage to DNA, which is advantageous in treating radioresistant tumors but can also induce cancer in exposed individuals. The attack of the OH· radical on a Guanine nucleotide was investigated, revealing the subsequent dissociation of the molecule. These findings may aid in adjusting reactive force fields to study complex DNA structures.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Saban Erdogan, Dilara Ozbakir Isin
Summary: In this study, the antioxidant activity of three flavonoids was evaluated using density functional theory calculations. Four main antioxidant mechanisms were examined, and theoretical investigations of possible locations for HAT and RAF mechanisms were conducted for the first time. Discussions of the results considered thermodynamic, kinetic, and structural data of various reaction paths.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2022)