MFI, BEA and FAU Zeolites scavenging role in Neonicotinoids and radical species elimination

2022 ◽  
Author(s):  
Maja Milojević-Rakić ◽  
Daliborka Popadić ◽  
Aleksandra Janosevic ◽  
Anka Jevremović ◽  
Bojana Nedić Vasiljević ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Target Species ◽  
Radical Species ◽  
Pesticide Removal ◽  
Neonicotinoid Pesticides

Ecotoxicity caused by neonicotinoid pesticides is largely due to oxidative stress on non-target species. Due to the fact that reactive radical species reach the environment, materials intended for pesticide removal...

scholarly journals Side effects of triazoles on treated crops

2021 ◽  
Author(s):  
Michal Jakl ◽  
Sanja Ćavar Zeljković ◽  
Ishak Kovač ◽  
Kateřina Bělonožníková ◽  
Jana Jaklová Dytrtová
Keyword(s):  
Oxidative Stress ◽  
Side Effects ◽  
Fungal Pathogens ◽  
Crop Production ◽  
Growth Parameters ◽  
Target Species ◽  
Fruit Peel ◽  
Biochemical Processes ◽  
Basic Plant ◽  
Cherry Tomatoes

Triazolic fungicides are widely applied in crop production to protect plants against fungal pathogens. However, they may influence the biochemical processes in plants and other non-target species. This paper is aimed at the effect of triazoles (namely tebuconazole, cyproconazole, and penconazole) single/mixed applications on the phenolics production in tomato (Solanum lycopersicum L.) fruit peel, amount of chlorophyll a and b in tomato leaves as well as on basic plant growth parameters. For this purpose, cherry tomatoes were planted in the pot experiment and foliarly-treated weekly, with the same total triazoles dose of 3.52 μmol per plant (in mixtures of 1.71 or 1.17 μmol of each in two or three components, respectively). The treatments increased the weight of fruits in the 1 harvest about 43%, however, this effect was not observed in the next harvest. Increased oxidative stress in the triazoles presence was observed, based on the elevated production of antioxidant phenolics in the 1 harvest. Most alarming is the decrease of the weight of thin stems and foliage and the concentration of chlorophyll a (b) in leaves in all triazoles-treated variants. The non-target impacts on plant biochemical processes (related to the phenolics or chlorophylls production and functionality) were confirmed.

Production de radicaux superoxydes par radiolyse pulsée de l'eau à transfert d'énergie linéique (TEL) élevé

2001 ◽  
Vol 79 (2) ◽  
pp. 180-183 ◽  
Author(s):  
G Baldacchino ◽  
V Trupin-Wasselin ◽  
S Bouffard ◽  
E Balanzat ◽  
M Gardès-Albert ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Heavy Ions ◽  
Pulse Radiolysis ◽  
Direct Methods ◽  
Superoxide Anions ◽  
Radical Species ◽  
High Let ◽  
High Linear Energy Transfer

The radiolysis of water with heavy ions of high linear energy transfer (LET) (-dE/dx) is characterized, in deaerated medium, by the production of superoxide anions, the radiolytic yields of which increase with the LET. Radiobiological interest in such radical species comes from the oxidative stress which may be generated by their dismutation in O2 and H2O2 in anoxic medium (radiotherapy with heavy ions). A brief review of the measurements of superoxide free radicals in aqueous solution by indirect or direct methods is presented. Moreover, some experimental results obtained by pulse radiolysis with Ar18+ ions (TEL = 290 keV·µm-1), are described. The interpretation of the kinetics takes into account the superoxide absorbance and that of hydrogen peroxide, which is present at the millisecond time scale.Key words: pulse radiolysis, heavy ions, superoxide radicals, high LET, kinetics.[Traduit par la Rédaction]

Oxidation of myosin by haem proteins generates myosin radicals and protein cross-links

2008 ◽  
Vol 410 (3) ◽  
pp. 565-574 ◽  
Author(s):  
Marianne N. Lund ◽  
Catherine Luxford ◽  
Leif H. Skibsted ◽  
Michael J. Davies
Keyword(s):  
Oxidative Stress ◽  
Horseradish Peroxidase ◽  
Time Course ◽  
Product Formation ◽  
Food Samples ◽  
Meat Tenderness ◽  
Radical Species ◽  
Sds Page ◽  
Cross Links ◽  
Haem Proteins

Previous studies have reported that myosin can be modified by oxidative stress and particularly by activated haem proteins. These reactions have been implicated in changes in the properties of this protein in food samples (changes in meat tenderness and palatability), in human physiology (alteration of myocyte function and force generation) and in disease (e.g. cardiomyopathy, chronic heart failure). The oxidant species, mechanisms of reaction and consequences of these reactions are incompletely characterized. In the present study, the nature of the transient species generated on myosin as a result of the reaction with activated haem proteins (horseradish peroxidase/H2O2 and met-myoglobin/H2O2) has been investigated by EPR spectroscopy and amino-acid consumption, product formation has been characterized by HPLC, and changes in protein integrity have been determined by SDS/PAGE. Multiple radical species have been detected by EPR in both the presence and the absence of spin traps. Evidence has been obtained for the presence of thiyl, tyrosyl and other unidentified radical species on myosin as a result of damage-transfer from oxidized myoglobin or horseradish peroxidase. The generation of thiyl and tyrosyl radicals is consistent with the observed consumption of cysteine and tyrosine residues, the detection of di-tyrosine by HPLC and the detection of both reducible (disulfide bond) and non-reducible cross-links between myosin molecules by SDS/PAGE. The time course of radical formation on myosin, product generation and cross-link induction are consistent with these processes being interlinked. These changes are consistent with the altered function and properties of myosin in muscle tissue exposed to oxidative stress arising from disease or from food processing.

scholarly journals Oxidative Stress: A Double Edged Sword

BioSight ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 4-12
Author(s):  
Kausar Abbas ◽  
Ufaque Batool ◽  
Abdul Shakoor Memon ◽  
Sana Soomro
Keyword(s):  
Oxidative Stress ◽  
Human Health ◽  
Stress Responses ◽  
Structural Defects ◽  
Radical Species ◽  
Biological Stress ◽  
Nutrition Deficiency ◽  
Harmful Effects ◽  
Aging Factor

Oxidative stress (OS) in simple words is defined as a state of imbalance between antioxidant and pro-oxidants defenses. The purpose of this article is to find out the connection of oxidative stress and free radical species with different aspects of human health. Owing to its harmful effects on proteins and nucleic acids, oxidative stress causes chronic diseases such as cardiovascular and neurodegenerative diseases, diabetes and cancer. It highlights the impacts of antioxidants and pro-oxidants particularly on fertility and infertility. It also focuses on the adverse effects caused by the long-term exposure to pro-oxidant factors leading to structural defects of mitochondrial DNA. As modern life style consists of more reliance on the processed foods and lack of physical activity, a nutrition deficiency, which is common in the present lifestyle, is also one of the reasons for oxidative stress to cause inflammation. However, this review also focuses on how diet affects and triggers inflammation. Redox mechanism with potential threats to health of mankind is discussed, how mere stress can provoke biological stress responses leading to development of disease or metabolic errors. Methods for reduction of oxidative stress are discussed in this review. It also highlights mitochondria as an aging factor as many ROS, particularly mitochondria ROS contribute directly to aging in human body. We will be discussing the recent findings in the oxidative stress field and its negative and positive impacts on human health.

Contractile activity-induced oxidative stress: cellular origin and adaptive responses

2001 ◽  
Vol 280 (3) ◽  
pp. C621-C627 ◽  
Author(s):  
A. McArdle ◽  
D. Pattwell ◽  
A. Vasilaki ◽  
R. D. Griffiths ◽  
M. J. Jackson
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Free Radical ◽  
Muscle Protein ◽  
Contractile Activity ◽  
Cellular Damage ◽  
Radical Species ◽  
Free Radical Species ◽  
Short Period

Previous studies have reported that oxidizing free radical species are generated during exercise, and there has been considerable interest in the potential effects of these on exercising tissues. We hypothesized that contracting skeletal muscle was a major source of oxidizing free radical species and that untrained skeletal muscle would adapt to the oxidative stress of a single short period of contractile activity by upregulation of the activity of cytoprotective proteins in the absence of overt cellular damage. Fifteen minutes of aerobic contractile activity was found to induce a rapid release of superoxide anions from mouse skeletal muscle in vivo, and studies with contracting cultured skeletal muscle myotubes confirmed that this was due to release from myocytes rather than other cell types present within muscle tissue in vivo. This increased oxidant production caused a rapid, transient reduction in muscle protein thiol content, followed by increases in the activities of superoxide dismutase and catalase and in content of heat shock proteins. These changes occurred in the absence of overt damage to the muscle cells.

scholarly journals The formation of free radicals by cardiac myocytes under oxidative stress and the effects of electron-donating drugs

1991 ◽  
Vol 277 (3) ◽  
pp. 833-837 ◽  
Author(s):  
J J O Turner ◽  
C A Rice-Evans ◽  
M J Davies ◽  
E S R Newman
Keyword(s):  
Oxidative Stress ◽  
Oxidation Process ◽  
Nitroxide Radical ◽  
Spectroscopic Studies ◽  
Membrane Lipid ◽  
Myocardial Tissue ◽  
Radical Species ◽  
Thiol Compounds ◽  
Thiyl Radicals ◽  
Radical Generation

The interaction of myoglobin with H2O2 leads via a two-electron oxidation process to the formation of ferryl myoglobin. Metmyoglobin is more readily activated than oxymyoglobin to the ferryl states, which are capable of inducing peroxidative damage to membranes. E.p.r. and optical spectroscopic studies show that the thiol-containing compounds N-(2-mercaptopropionyl) glycine and N-acetylcysteine and the trihydroxamate desferrioxamine attenuate these processes by reducing the ferryl myoglobin species to metmyoglobin, with the formation of thiyl radicals and the desferrioxamine nitroxide radical respectively. Biochemical investigations of the potential for myoglobin in ruptured myocytes to be involved in radical generation, when under oxidative stress, and of the nature of the resulting species, were also undertaken. E.p.r. spectroscopic studies revealed the formation of a radical species which is capable of inducing membrane lipid peroxidation. The interaction of the thiol compounds and desferrioxamine with components of myocardial tissue under these conditions results in the generation of thiol-derived radical species and the desferrioxamine nitroxide radical respectively. These data, along with those obtained using optical spectrocopy, support the assignment of the identity of the radical species generated from the myocytes as the ferryl myoglobin radical.

Review: Oxidative stress and excitotoxicity: a therapeutic issue in multiple sclerosis?

2008 ◽  
Vol 14 (1) ◽  
pp. 22-34 ◽  
Author(s):  
R.E. Gonsette
Keyword(s):  
Oxidative Stress ◽  
Multiple Sclerosis ◽  
Free Radicals ◽  
Therapeutic Approach ◽  
Chronic Phase ◽  
Axonal Loss ◽  
Radical Species ◽  
Inflammatory Reactions ◽  
Immune Mediated ◽  
Inflammatory Processes

There is increasing evidence that multiple sclerosis (MS) is not only characterized by immune mediated inflammatory reactions but also by neurodegenerative processes. In neurodegenerative diseases, neuronal and axonal loss is mediated by oxidative stress and excitotoxicity which constitute a final common toxic pathway. Importantly, peroxynitrite is the key mediator of those two intertwined pathomechanisms. In MS, peroxynitrite is consistently associated with active lesions and produces highly toxic nitrating and oxidizing radical species that alter lipid, protein, DNA and mitochondrial structures and functions. During the remitting phase, peroxynitrite participates to neuron and oligodendrocyte damage in association with inflammatory processes. During the chronic phase, peroxynitrite contributes to self-perpetuating mechanisms responsible for disease progression. Neutralization of oxidative stress and excitotoxicity, and in particular of peroxynitrite derived free radicals, might represent a therapeutic approach to provide neuroprotection in MS. Multiple Sclerosis 2008; 14: 22—34. http://msj.sagepub.com

scholarly journals Vitamin E in Human Health and Oxidative Stress Related Diseases

2021 ◽  
Author(s):  
Israel Ehizuelen Ebhohimen ◽  
Taiwo Stephen Okanlawon ◽  
Augustine Ododo Osagie ◽  
Owen Norma Izevbigie
Keyword(s):  
Oxidative Stress ◽  
Free Radicals ◽  
Vitamin E ◽  
Oxidative Process ◽  
Radical Species ◽  
Radical Chain ◽  
Chain Reactions ◽  
Hydrophobic Nature ◽  
Antioxidant Mechanisms ◽  
And Oxidative Stress

Oxidative stress characterized by an imbalance in the production and degradation of radical species has been implicated in the onset and progression of several diseases. The efficacy of antioxidants acting via the inhibition of radical chain reactions, scavenging of free radicals, direct donation of electrons to radical species and chelation of metal ions have been reported to attenuate the oxidative process. Vitamin E is an effective antioxidant and its hydrophobic nature and membrane permeability offer some benefits to application and bioavailability. This chapter highlights the following; structural differences in the vitamin family, biosynthesis in plants and the native biological role, antioxidant mechanisms of vitamin E, an overview of the prophylactic action of vitamin E as well as the effect on the oxidative process in some diseases.

Lycopene alleviates sulfamethoxazole-induced hepatotoxicity in grass carp (Ctenopharyngodon idellus) via suppression of oxidative stress, inflammation and apoptosis

2020 ◽  
Vol 11 (10) ◽  
pp. 8547-8559
Author(s):  
Hongjing Zhao ◽  
Yu Wang ◽  
Mengyao Mu ◽  
Menghao Guo ◽  
Hongxian Yu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Secondary Metabolites ◽  
Human Health ◽  
Grass Carp ◽  
Aquatic Environment ◽  
Ctenopharyngodon Idellus

Antibiotics are used worldwide to treat diseases in humans and other animals; most of them and their secondary metabolites are discharged into the aquatic environment, posing a serious threat to human health.

Sign in / Sign up

Export Citation Format

Share Document