Effect of flooding on the activities of some enzymes of activated oxygen metabolism, the levels of antioxidants, and lipid peroxidation in senescing tobacco leaves

1994 ◽  
Vol 14 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Weei Pirng Hurng ◽  
Ching Huei Kao
Keyword(s):  
Lipid Peroxidation ◽  
Oxygen Metabolism ◽  
Tobacco Leaves ◽  
Activated Oxygen

Effect of a medicinal agent, possessing antioxidant and antihypoxant properties, on the state of oxygen homeostasis and lipid peroxidation under experimental pneumoconiosis in albino rats

2018 ◽  
Vol 8 (2) ◽  
pp. 137-143
Author(s):  
A. Olyinyk ◽  
A Ślifirczyk ◽  
M. Nikoniuk ◽  
M. Celiński ◽  
D> Domańska
Keyword(s):  
Lipid Peroxidation ◽  
Oxygen Pressure ◽  
Oxygen Metabolism ◽  
Conjugated Dienes ◽  
Partial Oxygen Pressure ◽  
Albino Rats ◽  
Blood Oxygen Saturation ◽  
Arterial Blood ◽  
Conjugated Dienes And Trienes ◽  
Partial Oxygen

Introduction: Pneumoconioses (Pc) are interstitial pulmonary diseases of professional genesis, caused by long-term inhalation of high dust concentrations. Pcafflict 26.6-53% of the workers, exposed to dust contamination. The major feature of Pc course is irrevocability and incurability. Purpose: The research of the effect of ethylmethyl hydroxypyridine succinate, possessing antioxidant and antihypoxant characteristics, on the oxygen metabolism, acid-alkaline state, and lipid peroxidation at the background of experimental pneumoconiosis in albino rats. Material and methods: Pneumoconiosis was simulated on 72 albino rats through endotracheal injection of black coal suspension, on our own modification of O. Yu. Nykolenko methodology. Results: Manifestations of experimental pneumo-coniosis depended on the period of dust inhalation. Development of experimental pneumoconiosis was found to result in the decreased partial oxygen pressure in the arterial blood, compensated hyperventilation-induced respiratory alkalosis, and marked increase in lipid peroxidation activity that could be seen in the blood content of malon-dialdehyde, as well as of conjugated dienes and trienes. Conclusions: Application of ethylmethylhydroxy pyridine succinate in experimental pneumoconiosis has been found to improve oxygen metabolism, acid-alkaline state, and lipid peroxidation that is revealed in normalization of the partial oxygen pressure in the arterial blood, oxygen saturation of haemoglobin, index of bases’ deficiency BE (Ваse-Ехсеss), and in 1.6-2.0 decrease in the content of malondialdehyde, as well as of conjugated dienes and trienes.

Effect of a Urinary Preparation on Liver Injury by Short-term Carbon Tetrachloride Treatment in Rats

1999 ◽  
Vol 27 (02) ◽  
pp. 241-250 ◽  
Author(s):  
Tung-Yuan Lai ◽  
Yueh-Wern Wu ◽  
Wen-Chuan Lin
Keyword(s):  
Lipid Peroxidation ◽  
Carbon Tetrachloride ◽  
Liver Injury ◽  
Catalase Activity ◽  
Liver Lipid ◽  
Oxygen Metabolism ◽  
Short Term ◽  
Active Oxygen Metabolism ◽  
Serum Biochemical ◽  
Liver Lipid Peroxidation

The hepatoprotective effect of a preparation of human urine (PHU) was assessed against short-term carbon tetrachloride (CCl4) treatment in rats. Significant prevention of liver injury by PHU was found after CCl4 treatment, judging by the changes of serum biochemical parameters, and hepatic protein and triglyceride contents. The increased liver lipid peroxidation, and decreased liver vitamin C concentrations observed after CCl4 treatment were significantly prevented by PHU administration. The increase in liver glutathione (GSH) contents observed after CCl4 treatment was further increased by PHU treatment. Liver catalase activity decreased after CCl4 treatment, while liver superoxide dismutase and GSH-peroxidase activities did not change. PHU administration further inhibited the decrease in liver catalase activity after CCl4 treatment. These results indicate that PHU administration can prevent liver injury induced by CCl4 in rats by inhibiting enhanced lipid peroxidation and by improving disrupted active oxygen metabolism in the injured liver.

scholarly journals 385 Honey Dew Fruit Senescence is Regulated by Polyamine Inhibition of Lipid Peroxidation

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 510C-510
Author(s):  
Gene Lester
Keyword(s):  
Lipid Peroxidation ◽  
Free Radicals ◽  
Phospholipase D ◽  
Cucumis Melo ◽  
Oxygen Free Radicals ◽  
Phospholipid Content ◽  
Total Chlorophyll ◽  
Direct Inhibition ◽  
Activated Oxygen ◽  
Membrane Peroxidation

Polyamines are effective scavengers of activated oxygen free radicals produced by lipoxygenase (LOX) and phospholipase-D (PL-D). Activated oxygen free radicals cause peroxidative damage to membranes and hasten senescence. Exogenous polyamine spermidine (SPD) compared to spermine (SPM) at 1 mM or no polyamine was an effective inhibitor of honey dew (Cucumis melo L. var. inodorus) membrane peroxidation, as determined by malondialdehyde (MDA), following dark incubation for 6 or 48 hours of fully abscised fruit hypodermal mesocarp tissue. MDA levels in SPD-treated tissue was lowest in both 6 and 48 hours compared to SPM or no polyamine. SPD was effective in slowing lipid peroxidation as MDA was highly negatively correlated with the loss in total chlorophyll, plasma membrane H+ pumping ATPase activity, and microsomal phospholipid content (r = -0.89, -0.64 and -0.57, respectively). Both LOX and PL-D enzyme activities were not correlated with the total chlorophyll and microsomal membrane phospholipid losses or MDA levels, demonstrating that these enzymes act indirectly in the degradation of membranes through the production of lipid peroxidating free radicals. The results also demonstrate that the effect of polyamines as anti-senescence compounds is through direct inhibition of lipid peroxidation and not by affecting LOX or PL-D free radicle production.

Free radical metabolism, pigment degradation and lipid peroxidation in leaves during senescence

1994 ◽  
Vol 102 ◽  
pp. 459-471 ◽  
Author(s):  
Mark N. Merzlyak ◽  
G.A.F. Hendry
Keyword(s):  
Lipid Peroxidation ◽  
Incomplete Data ◽  
Oxygen Radicals ◽  
Membrane Lipids ◽  
Photosynthetic Apparatus ◽  
Oxidative Modification ◽  
Proteolytic Degradation ◽  
Oxygen Species ◽  
Activated Oxygen ◽  
Lines Of Evidence

SynopsisVarious lines of evidence suggest that the controlled increase in the production of oxygen radicals is an important factor involved in phytohormone metabolism, selective changes in membrane permeability, degradation of photosynthetic pigments and unsaturated membrane lipids, oxidative modification and subsequent proteolytic degradation, and other events occurring in ageing and senescing leaves. Increased lipid peroxidation, appearance of chlorophyll allomerised products, as well as fluorescent ‘lipofuscin-like’ pigments have been documented in different systems of leaf senescence. On the other hand, the accumulation of peroxidised products may result from the alteration to native structural organisation and energy dissipation reactions of the photosynthetic apparatus. Although there are contradictory and incomplete data on the activity of the systems involved in the metabolism of oxygen radicals, it seems that senescing leaves retain, at least in part, their defence potential against both activated oxygen species and toxic lipid peroxidation products. This provides the plant with the ability to successfully dismantle its photosynthetic apparatus during senescence in a relatively safe manner.

Relationship between activated oxygen metabolism and browning of “Yali” pears during storage

2020 ◽  
Vol 44 (4) ◽  
Author(s):  
Ling Li ◽  
Yinyin Zhang ◽  
Xiaolan Fan ◽  
Jidong Wang ◽  
Liya Liang ◽  
...  
Keyword(s):  
Oxygen Metabolism ◽  
Activated Oxygen
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