Article
Engineering, Environmental
Yelim Kim, Hongshin Lee, Hoon Oh, Zeeshan Haider, Jaemin Choi, Yong-Uk Shin, Hyoung-il Kim, Jaesang Lee
Summary: This study reexamined the mechanisms of oxidative organic degradation by the binary mixture of periodate and H2O2 (PI/H2O2). The findings showed that PI/H2O2 predominantly decomposes organics by ·OH at pH < 5, contradicting previous claims. The study also revealed a potential switch in the major oxidant under varying pH conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Lingwei Gao, Yang Guo, Juhong Zhan, Gang Yu, Yujue Wang
Summary: This study evaluated the effects of various quenchers on the mechanism of a cobalt mediated peroxymonosulfate (Co(II)/PMS) process and found that these quenchers not only quench target reactive species but also cause interference effects. Therefore, caution should be exercised when applying the quenching method to investigate the mechanism of the persulfate-based process.
Article
Engineering, Environmental
Shelby Buckley, Frank Leresche, Blair Hanson, Fernando L. Rosario-Ortiz
Summary: The complex effects of ozonation on the photo-physical and size-based properties of dissolved organic matter (DOM) were investigated using two DOM isolates, Suwannee River Fulvic Acid (SRFA) and Pony Lake Fulvic Acid (PLFA). The results showed that ozonation affected the fluorescence quantum yield differently in low and high apparent molecular weight (AMW) fractions. It also increased the singlet oxygen quantum yield in the low AMW fractions, indicating these fractions are the most photoreactive. The study further suggested that the photoactive and fluorescent fractions of DOM are likely independent pools of chromophores from different AMW fractions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xuguang Li, Le Wang, Yanxiu Guo, Wen Song, Yanfei Li, Liangguo Yan
Summary: MoS2-based materials have shown potential as PMS activators for tetracycline removal. The goethite-MoS2 hybrids (G-MoS2) exhibited higher degradation rate than pure MoS2. The study also revealed that (OH)-O-center dot played a significant role in TC removal in the 0.1G-MoS2/PMS system.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Zhiyuan Feng, Qingling Tian, Qianqian Yang, Yanbo Zhou, Hongying Zhao, Guohua Zhao
Summary: This study demonstrates the efficient treatment of coal water slurry gasification wastewater using a CuCN/photoelectrochemical system, reducing TOC levels with low energy consumption. The treated wastewater can be utilized for salt recovery and utilization, highlighting the potential of synergistic photo-electro-catalytic effects in wastewater remediation processes, especially for saline coal wastewater.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Changyin Zhu, Guodong Fang, Fengxiao Zhu, Dixiang Wang, Chenyan Xue, Ning Chen, Juan Gao, Dongmei Zhou
Summary: This study demonstrates that activated carbon can mediate oxidative species formation and pollutants transformation under aerobic conditions, with oxygen participating in the production of hydroxyl radicals.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Chemistry, Analytical
Wanchao Yu, Lixia Zhao
Summary: ROS, as important oxidizing species in ecosystems, play various roles and monitoring their concentration is crucial for the environment. The chemiluminescence method has attracted attention for ROS detection due to its high sensitivity and simplicity, showing advances in recent years.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Environmental
Sihyeon Jo, Hyejin Kim, Kyoung Eun Lee, Sukhwa Hong, Kangwoo Cho, Sanghoon Kim, Gun-hee Moon, Jonghun Lim
Summary: The selective control of reactive oxygen species (ROS) is crucial in abating aquatic organic pollutants in advanced oxidation processes (AOPs). Copper phosphide (CuxP) exhibits a Janus-like behavior, serving as a solid oxidative reagent under acidic and dark conditions and as a photosensitizer under neutral and light conditions. This dual nature of CuxP allows for the selective production of ROS and offers new possibilities for water treatment and the development of efficient AOP systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Haoran Yu, Danxu Liu, Hengyi Wang, Haishuang Yu, Qingyun Yan, Jiahui Ji, Jinlong Zhang, Mingyang Xing
Summary: In recent years, there have been numerous studies on the Fenton or Fenton-like reactions mediated by nonfree radicals such as singlet oxygen (1O2). However, there are few studies on the synergistic effect of 1O2 and free radicals on the degradation of organic molecules in the Fenton reaction. This study constructs a CoP/Fe2+/AM1.5 system and demonstrates the controllable formation of surface 1O2 and center dot OHads through the oxidation and reduction centers on the CoP surface. The synergistic effect between 1O2 and the surface-adsorbed center dot OHads leads to the degradation of phenol.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
Zachary C. Redman, Jessica L. Begley, Isabel Hillestad, Brian P. Dimento, Ryan S. Stanton, Alon R. Aguaa, Michael C. Pirrung, Patrick L. Tomco
Summary: The photochemical degradation pathways and factors influencing the aquatic photodegradation rate of 6PPDQ, a toxic product of 6PPD, were studied under simulated sunlight conditions. The results indicate that direct photochemical degradation dominates in warm waters, while indirect pathways involving ROS mediated by CDOM dominate in cold waters. Singlet oxygen and hydroxyl radical significantly contribute to the degradation of 6PPDQ. The transformation products identified include oxidation, cleavage, dealkylation, rearrangement, and deamination processes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Juqin An, Huibin Liu, Xinming Wang, Dilinuer Talifu, Abulikemu Abulizi, Mailikezhati Maihemuti, Kejun Li, Haifeng Bai, Ping Luo, Xiaoxia Xie
Summary: This study quantified and studied reactive oxygen species (ROS) induced by particulate matter in Hotan, China. It was found that ROS production was higher in non-dust periods compared to dust periods, and PM2.5 with larger surface area showed increased ROS generation. Trace metals were also found to be correlated with ROS production in the particles.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Taylor O. Hope, Tamara Reyes-Robles, Keun Ah Ryu, Steven Mauries, Nicole Removski, Jacinthe Maisonneuve, Rob C. Oslund, Olugbeminiyi O. Fadeyi, Mathieu Frenette
Summary: We investigated the photocatalytic activation of phenols for tyrosine labelling using flavin-based photocatalysts, and found that the initial covalent binding between phenols and tyrosine is not radical addition, but radical-radical recombination. This proposed mechanism may also explain the mechanism of other reported tyrosine-tagging approaches. Competitive kinetics experiments showed the generation of phenoxyl radicals through multiple pathways involving the excited riboflavin-photocatalyst or singlet oxygen, increasing the likelihood of radical-radical recombination.
Article
Engineering, Environmental
Lei Wang, Boqiang Li, Dionysios D. Dionysiou, Baiyang Chen, Jie Yang, Juan Li
Summary: The study found that alcohols have an impact on the reliability of ·OH detection, possibly making the traditional ·OH determination method unreliable or misleading. Through careful investigation, an overlooked reaction pathway during H2O2 and ·OH transformations was revealed, showing that varying oxygen concentrations, pHs, alcohol dosages, and types can affect H2O2 formation, which in turn affects the accuracy of ·OH determination.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Wentian Zheng, Yanbiao Liu, Wen Liu, Haodong Ji, Fang Li, Chensi Shen, Xiaofeng Fang, Xiang Li, Xiaoguang Duan
Summary: An integrated electrochemical filtration system was designed in this study for catalytic activation of PMS and degradation of aqueous microcontaminants. The system showed superior activity in degrading a wide array of persistent organic contaminants across various conditions, providing a green strategy for the remediation of organic pollution.
Article
Engineering, Chemical
Shuyin Zhang, Jing Zou, Jiawen Li, Yixin Huang, Jianying Wu, Xiaobin Liao, Qingsong Li, Baoling Yuan, Jun Ma
Summary: This study introduced sodium metaborate (NaBO2) into the thermal/PMS system to enhance the degradation of acetaminophen. NaBO2 showed better performance than sodium tetraborate in accelerating acetaminophen degradation at a wide pH range. The system produced 1O2 and HO· as the main ROS responsible for acetaminophen degradation. Three elimination pathways for acetaminophen were proposed based on the identified intermediates. NaBO2 dosage, PMS concentration, and reaction temperature were found to accelerate acetaminophen removal. Cl- and Br- promoted acetaminophen removal, while humic acid had an adverse effect. Additionally, NaBO2 significantly inhibited the production of chlorinated by-products in Cl--containing water treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Urology & Nephrology
Katerina Zachova, Jana Jemelkova, Petr Kosztyu, Yukako Ohyama, Kazuo Takahashi, Josef Zadrazil, Jiri Orsag, Karel Matousovic, Dana Galuszkova, Nadezda Petejova, Jiri Mestecky, Milan Raska
Summary: This study found an increased number of migratory Gd-IgA1-?(+) cells in the peripheral blood of IgAN patients, which have the potential to home to mucosal sites in the upper respiratory and digestive tracts where Gd-IgA1 could be produced during local infections.
JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY
(2022)
Correction
Plant Sciences
Iva Ilikova, Petr Ilik, Monika Opatikova, Rameez Arshad, Lukas Nosek, Valav Karlicky, Zuzana Kucerova, Pavel Roudnicky, Pavel Pospisil, Dusan Lazar, Jan Bartos, Roman Kouril
Article
Immunology
Michal Krupka, Tereza Matusu, Helena Sutova, Katerina Wezdenkova, Renata Vecerova, Yvona Smesna, Milan Kolar, Hana Bilkova Frankova, Jana Krivankova, Miroslav Jorenek, Zdenek Novak, Milan Raska, Ondrej Holy
Summary: This study analyzed data from four laboratories in the Olomouc Region, Czech Republic, and found significant differences in measles positive results depending on the individual laboratories and detection methods used. However, individuals born before the introduction of vaccination showed higher levels of antibodies.
Review
Plant Sciences
Pavel Pospisil, Aditya Kumar, Ankush Prasad
Summary: This review summarizes and evaluates the involvement of ROS in oxidative signaling in PSII. Despite the limitations in diffusion and lifetime of ROS, evidence suggests that oxidatively modified lipids and pigments may participate in retrograde signaling from chloroplasts to the nucleus.
PHOTOSYNTHESIS RESEARCH
(2022)
Article
Agronomy
Miloslav Kitner, Marco Thines, Michaela Sedlarova, Lucie Vaculna, Rita Ban, Katalin Korosi, Maria Iwebor, Tatiana Antonova, Tahir Ali, Petr Nadvornik, Ales Lebeda, Otmar Spring
Summary: This study genetically analyzed P. halstedii samples collected across Europe and discovered two distinct lineages infecting sunflowers, which might represent different species. The evolution of virulence phenotypes was found to be independent of host-specific characteristics.
Article
Biochemistry & Molecular Biology
Renuka Ramalingam Manoharan, Michaela Sedlarova, Pavel Pospisil, Ankush Prasad
Summary: Reactive oxygen species play a crucial role in maintaining cellular homeostasis and redox signaling, but excessive production can lead to protein dysfunction and damage. This study focuses on understanding the process of radical-mediated protein oxidation in macrophages using the immuno-spin trapping technique. The results show the formation of hydroxyl radicals and lipid peroxidation products, indicating the need for further investigation into the specific proteins involved in macrophage activation and inflammation.
BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS
(2023)
Article
Biochemistry & Molecular Biology
Ankush Prasad, Hana Duchova, Renuka Ramalingam Manoharan, Deepak Rathi, Pavel Pospisil
Summary: Skin plays a crucial role in protection, metabolism, thermoregulation, sensation, and excretion. It is constantly exposed to environmental aggression, which leads to oxidative stress mainly affecting the epidermal and dermal cells. Reactive oxygen species (ROS) generated as a result of environmental fluctuations have been found to contribute to ultra-weak photon emission through biomolecule oxidation. In recent years, ultra-weak photon emission detection techniques have been utilized to study oxidative stress in various living systems. Monitoring the ultra-weak photon emission under the exogenous application of a Fenton reagent revealed the involvement of triplet carbonyls and singlet oxygen as the final emitters. Additionally, the study observed the formation of oxidatively modified protein adducts and protein carbonyls upon treatment with hydrogen peroxide (H2O2) using an immunoblotting assay. These findings enhance our understanding of ROS generation mechanisms in skin and the potential applications of excited species as indicators of physiological states.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Immunology
Jiri Mestecky, Bruce A. A. Julian, Milan Raska
Summary: IgA nephropathy is an autoimmune disease caused by the recognition of poorly galactosylated IgA1 by anti-glycan antibodies, resulting in the formation of nephritogenic immune complexes. The incidence of IgA nephropathy varies geographically and racially.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Urology & Nephrology
Jana Jemelkova, Milada Stuchlova Horynova, Petr Kosztyu, Katerina Zachova, Josef Zadrazil, Dana Galuszkova, Kazuo Takahashi, Jan Novak, Milan Raska
Summary: Galactose-deficient O-glycans (Gd-IgA1) of Immunoglobulin A1 (IgA1) play a crucial role in the pathogenesis of IgA nephropathy (IgAN). Inflammatory signals during mucosal infections may result in the overexpression of GALNT14, which contributes to the overproduction of Gd-IgA1 in patients with IgAN. GALNT14 overexpression enhances galactose deficiency of IgA1, while knock-down reduces it.
KIDNEY INTERNATIONAL REPORTS
(2023)
Article
Biology
Kristyna Sloupenska, Barbora Koubkova, Pavel Horak, Beata Hutyrova, Mojmir Racansky, Jan Mares, Martina Miklusova, Jan Schovanek, Jana Zapletalova, Milan Raska, Michal Krupka
Summary: In this study, the presence of myositis-specific and myositis-associated autoantibodies was analyzed in patients with Lyme disease and post-treatment Lyme disease syndrome (PTLDS). The study found that PTLDS patients had a higher presence of these autoantibodies compared to control subjects, suggesting their involvement in the pathogenesis of this syndrome.
Article
Chemistry, Analytical
Michaela Poplova, Ankush Prasad, Eduard Van Wijk, Pavel Pospisil, Michal Cifra
Summary: Noninvasive label-free BAL imaging enables quantitative spatial resolution of chemically induced oxidative stress on the skin. Additionally, a chemical model of the skin can reproduce essential features of the response of real skin to oxidative stress.
ANALYTICAL CHEMISTRY
(2023)
Review
Oncology
Valeria Skopelidou, Jan Strakos, Jozef Skarda, Milan Raska, Leona Kafkova-Raskova
Summary: Lung cancer, especially small cell lung cancer (SCLC), is a major cause of cancer-related deaths globally. Late diagnosis limits treatment options, and chemotherapy is the most common treatment for SCLC. Immunotherapy, particularly checkpoint inhibitors, becomes more important as the disease progresses.
PATHOLOGY & ONCOLOGY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Maryna Golovchenko, Jakub Opelka, Marie Vancova, Hana Sehadova, Veronika Kralikova, Martin Dobias, Milan Raska, Michal Krupka, Kristyna Sloupenska, Natalie Rudenko
Summary: Lyme disease spirochetes have the ability to invade immune-privileged sites in the host and employ diverse strategies to evade the host immune system and maintain chronic infection. A case of dual infection with two species of spirochetes in the brain tissue of a Lyme disease patient is reported, with different distribution patterns and atypical morphology observed.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
