Gas-phase oxidation of alcohols with dioxygen over an Au/TiO2 catalyst: The role of reactive oxygen species

2015 ◽  
Vol 56 (3) ◽  
pp. 343-346 ◽  
Author(s):  
V. I. Sobolev ◽  
K. Yu. Koltunov
2020 ◽  
Vol 10 (24) ◽  
pp. 8445-8457
Author(s):  
Kun Liu ◽  
Yichen Zhao ◽  
Jiale Wang ◽  
Qingsong Xue ◽  
Guofeng Zhao

The fabrication of qualified catalysts is a key issue to implement gas-phase aerobic alcohol oxidation, but necessarily requires understanding the structures of catalytic active sites and the supply of active oxygen species.


2020 ◽  
Vol 21 (5) ◽  
pp. 477-498
Author(s):  
Yongfeng Chen ◽  
Xingjing Luo ◽  
Zhenyou Zou ◽  
Yong Liang

Reactive oxygen species (ROS), an important molecule inducing oxidative stress in organisms, play a key role in tumorigenesis, tumor progression and recurrence. Recent findings on ROS have shown that ROS can be used to treat cancer as they accelerate the death of tumor cells. At present, pro-oxidant drugs that are intended to increase ROS levels of the tumor cells have been widely used in the clinic. However, ROS are a double-edged sword in the treatment of tumors. High levels of ROS induce not only the death of tumor cells but also oxidative damage to normal cells, especially bone marrow hemopoietic cells, which leads to bone marrow suppression and (or) other side effects, weak efficacy of tumor treatment and even threatening patients’ life. How to enhance the killing effect of ROS on tumor cells while avoiding oxidative damage to the normal cells has become an urgent issue. This study is a review of the latest progress in the role of ROS-mediated programmed death in tumor treatment and prevention and treatment of oxidative damage in bone marrow induced by ROS.


2020 ◽  
Vol 16 ◽  
Author(s):  
Andrey Krylatov ◽  
Leonid Maslov ◽  
Sergey Y. Tsibulnikov ◽  
Nikita Voronkov ◽  
Alla Boshchenko ◽  
...  

: There is considerable evidence in the heart that autophagy in cardiomyocytes is activated by hypoxia/reoxygenation (H/R) or in hearts by ischemia/reperfusion (I/R). Depending upon the experimental model and duration of ischemia, increases in autophagy in this setting maybe beneficial (cardioprotective) or deleterious (exacerbate I/R injury). Aside from the conundrum as to whether or not autophagy is an adaptive process, it is clearly regulated by a number of diverse molecules including reactive oxygen species (ROS), various kinases, hydrogen sulfide (H2S) and nitric oxide (NO). The purpose this review is to address briefly the controversy regarding the role of autophagy in this setting and to examine a variety of disparate molecules that are involved in its regulation.


Antioxidants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 608
Author(s):  
Domenico Nuzzo

All cells continuously generate reactive oxygen species (ROS) through the respiratory chain during the energy metabolism process [...]


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