Wyniki wyszukiwania - Biblioteka Nauki

1

The activity of antioxidant enzymes in Arabidopsis thaliana exposed to colchicine and hydrogen peroxide

100%

Drazkiewicz M. , Skorzynska-Polit E. , Wanke M. , Swiezewska E.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

2

Antioxidative defense enzymes in lupine roots in post-hypoxia

88%

Garnczarska M. , Bednarski W. , Morkunas I. , Ratajczak L.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

3

Effect of short-term exposure to NaCl on photochemical activity and antioxidant enzymes in Bruguiera parviflora, a non-secretor mangrove

88%

Mishra S. , Das A. B.

Acta Physiologiae Plantarum

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2004

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tom 26

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nr 3

4

Activities of selected antioxidant enzymes in blood as dependent on training

88%

Hubner-Wozniak E. , Panczenko-Kresowska B.

Polish Journal of Environmental Studies

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1997

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tom 06

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nr 2

5

The activity of antioxidative enzymes, contents of H2O2 and of ascorbate in Botrytis cinerea infected tomato leaves

88%

Patykowski J. , Urbanek H.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

6

Antioxidative enzymes in cucumber cell suspension cultures acclimatized to salt stress - in vitro study

75%

Naliwajski M. R. , Wielanek M. , Sklodowska M.

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nr 1 Suppl.

7

Effect of iron supplementation on intestinal function and oxidative stress in piglets with induced colitis

75%

Chen Q. , Le G. W. , Shi Y. H. , Zhang S. M. , Jin X.

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2007

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tom 16

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nr 2

205-213

8

Effect of Cu2plus concentration on growth, antioxidant enzyme activity and malondialdehyde content in garlic [Allium sativum L.]

75%

Meng Q. , Zou J. , Zou J. , Jiang W. , Liu D.

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tom 49

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nr 1

95-101

EN

The effects of different concentrations (10-5 M, 10-4 M. 10-3 M) of Cu2+ on growth, antioxidant enzyme activity and malondialdehyde (MDA) content were investigated in hydroponically grown Allium sativum L. The results indicated that the growth of garlic seedlings was not inhibited under treatment with 10-5 M Cu2+. Garlic seedlings exposed to 10-4 M and 10-3 M Cu2+ exhibited significant growth reduction. With increasing Cu2+ concentration and treatment time, superoxide dismutase (SOD) activity increased in leaves and roots, and peroxidase (POD) activity increased in leaves. In roots of plants exposed to 10-4 M and 10-3 M Cu2+, POD activity increased within 9 d and then dropped, but was still higher than in the control at the end of the experiment. Catalase (CAT) activity increased in seedlings grown at 10-5 M and l0-4 M, whereas a highly toxic level of Cu2+ (10-3 M) markedly inhibited CAT activity. SOD and POD activity were higher in roots than in leaves, whereas CAT activity was higher in leaves than in roots under both control and Cu2+ treatments. There was no obvious effect on MDA content in the seedlings treated with 10-5 M Cu2+; at 10-4 M and 10-3 M Cu2+ it increased. The mechanisms of Cu2+ toxicity and Cu2+ tolerance in garlic are briefly discussed.

9

Oxidative stress biomarkers in the blood of Holsteiner horses during exercise training

75%

Andriichuk A. , Tkachenko H. , Kurhaluk N.

Słupskie Prace Biologiczne

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2014

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nr 11

10

Changes in antioxidant enzymes activity under thermal stress - impact of 24-epibrassinolide

75%

Pociecha E. , Janeczko A.

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nr 1 Suppl.

11

Changes in prooxidative-antioxidative balance in rowers following ergometric exercise test of maximal intensity

75%

Skarpanska-Stejnborn A. , Pilaczynska-Szczesniak L. , Basta P. , Adach Z.

Studies in Physical Culture and Tourism

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2009

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tom 16

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nr 4

12

The role of antioxidant enzymes and isoflavonoids in limiting chilling injury in soybean [Glycine max L. Merr. var. Essor] seedlings

75%

Posmyk M. M. , Bailly C. , Szafranska K. , Janas K. M. , Corbineau F.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

13

Evaluation of selected parameters of the antioxidative system in patients with type 2 diabetes in different periods of metabolic compensation

75%

Rysz J. , Blaszczak R. , Banach M. , Kedziora-Kornatowska K. , Kornatowski T. , Tanski W. , Kedziora J.

Archivum Immunologiae et Therapiae Experimentalis

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2007

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tom 55

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nr 5

14

Antioxidant treatment prevents cardiac protein oxidation after ischemia-reperfusion and improves myocardial function and coronary perfusion in senescent hearts

75%

Besse S. , Bulteau A. L. , Boucher F. , Riou B. , Swynghedauw B. , De Leiris J.

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2006

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tom 57

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nr 4

EN

Cardiovascular ageing is associated with an increase in cardiac susceptibility to ischaemia and reperfusion and production of reactive oxygen species has been suspected to be responsible for this age-associated particular vulnerability. To determine whether administration of antioxidant treatment could afford some protection against ischaemia and reperfusion during aging, isolated perfused hearts from adult and senescent rats were submitted to normoxia (180 min), prolonged low-flow ischaemia (15% of initial coronary flow;180 min) or low-flow ischaemia/reperfusion (45 min/30 min), without or with antioxidant enzymes (superoxide dismutase+catalase; 50IU/ml). Contractile function and coronary perfusion were measured and protein oxidation was quantitated in left ventricle after normoxia, ischaemia and ischaemia/reperfusion. Protein oxidation was higher in senescent than in adult hearts after ischaemia-reperfusion, in contrast to prolonged ischaemia. During prolonged ischaemia, antioxidant treatment prevented coronary vasoconstriction at both ages and delayed contractile dysfunction in senescent hearts but did not limit protein oxidation. During reperfusion, antioxidant treatment prevented coronary vasoconstriction and protein oxidation at both ages and considerably improved recovery of contractile function in senescent hearts. In conclusion, antioxidant treatment fully protects the senescent heart against ischaemia/reperfusion but not against prolonged ischaemia injury, indicating that oxidative stress plays a central role in the age-associated vulnerability to ischaemia-reperfusion.

15

Antioxidant defense in centenarians [a preliminary study]

75%

Klapcinska B. , Derejczyk J. , Wieczorowska-Tobis K. , Sobczak A. , Sadowska-Krepa E. , Danch A.

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nr 2

EN

The study was designed to assess the antioxidant defense mechanisms, either enzymatic or non-enzymatic, in a group of sixteen centenarians (one male and fifteen female subjects aged 101 to 105 years) living in the Upper Silesia district (Poland) in order to evaluate the potential role of antioxidant defenses in human longevity. The results of our preliminary study showed that in comparison with young healthy female adults the centenarians had significantly higher red blood cell glutathione reductase and catalase activities and higher, although insignificantly, serum vitamin E level.

16

The effect of melatonin on antioxidant enzymes in human diabetic skin fibroblasts

75%

Kilanczyk E. , Bryszewska M.

Cellular and Molecular Biology Letters

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2002

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tom 07

|

nr Suppl.

17

L-carnitine protects gastric mucosa by decreasing ischemia-reperfusion induced lipid peroxidation

75%

Derin N. , Izgut-Uysal V. N. , Agac A. , Aliciguzel Y. , Demir N.

Journal of Physiology and Pharmacology

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2004

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tom 55

|

nr 3

EN

Studies have shown that reactive oxygen metabolites and lipid peroxidation play important roles in ischemia-reperfusion injury in many organs such as heart, brain and stomach. The aim of this study is to evaluate the antioxidant effect of L-carnitine on gastric mucosal barrier, lipid peroxidation and the activities of antioxidant enzymes in rat gastric mucosa subjected to ischemia-reperfusion injury. Rats were subjected to 30 min of ischemia followed by 60 min of reperfusion. L-carnitine (100 mg/kg), was given to rats intravenously five minutes before the ischemia. In our experiment, lesion index, thiobarbituric acid reactive substances, prostaglandin E2 and mucus content in gastric tissue were measured. The results indicated that the lesion index and the formation of thiobarbituric acid reactive substances increased significantly with the ischemia-reperfusion injury in the gastric mucosa. L-carnitine treatment reduced these parameters to the values of sham operated rats. The tissue catalase and superoxide dismutase activities and prostaglandin E2 production decreased significantly in the gastric mucosa of rats exposed to ischemia-reperfusion. L-carnitine pretreatment increased the tissue catalase activity and prostaglandin E2 to the levels of sham-operated rats but did not change superoxide dismutase activity. There were no significant difference in glutathione peroxidase activity and mucus content between the groups in the gastric mucosa. In summary, L-carnitine pretreatment protected gastric mucosa from ischemia-reperfusion injury by its decreasing effect on lipid peroxidation and by preventing the decrease in prostaglandin E2 content of gastric mucosa.

18

Age-dependent responses of Phaseolus aureus Roxb. to inorganic salts of mercury and cadmium

75%

Shaw B. P. , Rout N. P.

|

1998

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tom 20

|

nr 1

EN

Phaseolus aureus Roxb. was exposed to Hg and Cd separately at different stages/ages of its development, viz. seed germination stage and seedling stages (4th and 6th day). The responses, besides being metal specific, were also age-dependent. The root growth study at germination stage treatment (GST) revealed Hg to be more toxic than Cd, but, in contrast, at seedling stage treatment (SST) with seedlings more than 5 days old, while Cd killed all the seedlings at 30 µM concentration, Hg did not even at 200 µM. Among the enzymes studied, catalase showed greater metal specific and age-dependent responses than the peroxidases. Both the metals significantly increased the levels of chlorophylls and carotenoids at GST (25 µM Hg/Cd) and 4th day SST (20 µM Hg/Cd), but not at 6th day SST (20 µM Hg/Cd). The photosynthetic O₂ evolution rate expressed as per unit chlorophyll (chl) decreased irrespective of the treatment stages, and also the metals; however, when expressed as per unit f. w., it was inhibited only at 6th day SST, exclusively by Cd. It seems that plants, unlike animals, are capable of facing challenges of metals more at younger than at older stages of their development, probably by mechanisms very different from those genetically controlled.

19

The activity of cellular antioxidant enzymes induced in Solanum species by Phytophthora infestans

75%

Polkowska-Kowalczyk L. , Maciejewska U. , Wielgat B.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

20

Phosphate-dependent oxidative stress in Chlorella vulgaris

75%

Kozlowska-Szerenos B. , Borowska A. , Maleszewski S.

Polish Journal of Natural Sciences. Supplement

|

2003

|

tom 01