Effects of irradiation conditions on the radiation sensitivity of microorganisms in the presence of OH-radical scavengers

Múčka, V.; Červenák, Jaroslav; Reimitz, Dan; Čuba, Václav; Bláha, Pavel; Neužilová, Barbora

doi:10.1080/09553002.2018.1532610

Cited by 8 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, a comparative experiment using methanol as the ·OH scavenger was conducted under identical conditions. , The experimental results, as shown in Figure , revealed that the oxidation rate of Fe 2+ could still reach 72.72% after adding 0.01 M methanol solution for 24 h. Meanwhile, the oxidation rate of the no-methanol control group also reached 35.45%. This indicates that Fe 2+ can still be oxidized when ·OH is quenched by methanol or in the absence of ·OH, suggesting that there are other oxidation mechanisms besides ·OH to drive the oxidation reaction.…”

Section: Resultsmentioning

confidence: 97%

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Cui

Sun

et al. 2023

Langmuir

View full text Add to dashboard Cite

Nanobubble (NB) technology has demonstrated the potential to enhance or substitute for current treatment processes in various areas. However, research employing it as a novel advanced oxidation process has thus far been relatively limited. Herein, we focused on the oxidative capacity of oxygen NBs and investigated the feasibility of utilizing their enhanced oxidation of ferrous ions (Fe 2+ ) in a sulfuric acid medium when using copper as a catalyst and their effect mechanism. It was demonstrated that oxygen NBs could collapse to produce hydroxyl radicals (•OH) in the absence of dynamic stimuli using electron spin resonance spectroscopy, and methylene blue was used as a molecular probe for •OH to illustrate that NB stability, determined by their properties, is the critical factor affecting •OH release. In subsequent Fe 2+ oxidation experiments, it was discovered that both strong acidity and copper ions (Cu 2+ ) contribute to accelerating the collapse of NBs to produce •OH. While •OH derived from the collapse of NBs acts on Fe 2+ , the molecular oxygen generated homologously with •OH will further activate the catalytic oxidation of Fe 2+ by interacting with Cu 2+ . With the synergistic effect of the above two oxidationdriven mechanisms, the oxidation rate of Fe 2+ can be significantly increased up to 88% due to the exceptional properties of oxygen NBs, which facilitate the formation of an atmosphere with persistent oxygen supersaturation and the generation of oxidation radicals. This study provides significant insight into applying NBs as a prospective technology for enhanced oxidation processes.

show abstract

Section: Resultsmentioning

confidence: 97%

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Cui

Sun

et al. 2023

Langmuir

View full text Add to dashboard Cite

show abstract

Radiation sensitivity of biological systems, its modification by chemical modifiers and its quantitative evaluation

Múčka,

Čuba

2024

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Large number of sensitizers and protectors of cells, tissues, organs and organisms are being discussed in this review. Attention is paid to metals, nanoparticles or organic compounds as modifiers. They can modify the radiation sensitivity by 20–60%. In most cases, sensitization is caused by an increase in DNA damage or a decrease in the repair of radiation damage. The protection can be caused in many cases by repair of damaged DNA molecules, proteins or enzymes, or by reducing the ROS concentration. The most current research tasks in this area are formulated. A new quantitative and reproducible method of evaluating modifiers is discussed.

show abstract

Genome-guided approaches and evaluation of the strategies to influence bioprocessing assisted morphological engineering of Streptomyces cell factories

Khushboo

Thakur

Kumar

et al. 2023

Bioresource Technology

View full text Add to dashboard Cite

Effects of irradiation conditions on the radiation sensitivity of microorganisms in the presence of OH-radical scavengers

Cited by 8 publications

References 29 publications

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Radiation sensitivity of biological systems, its modification by chemical modifiers and its quantitative evaluation

Genome-guided approaches and evaluation of the strategies to influence bioprocessing assisted morphological engineering of Streptomyces cell factories

Contact Info

Product

Resources

About