Free radical activity and loss of viability during drying of desiccation-sensitive tree seeds

SynopsisViability loss during desiccation in the recalcitrant seeds of Castanea saliva, Aesculus hippocastanum and Quercus robur was accompanied by increased lipid peroxidation and build up of a stable free radical within their embryonic axes. We argue that the accumulation of the free radical marks the termination of a series of destructive events following the initiation of oxidative attack during moisture stress in recalcitrant seeds.

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Antioxidant and Antifungal Properties of Benzimidazole Derivatives

Zeitschrift für Naturforschung C ◽

10.1515/znc-2010-9-1002 ◽

2010 ◽

Vol 65 (9-10) ◽

pp. 537-542 ◽

Cited By ~ 3

Author(s):

Canan Kuş ◽

Fatma Sözüdönmez ◽

Benay Can-Eke ◽

Tülay Çoban

Keyword(s):

Lipid Peroxidation ◽

Free Radical ◽

Radical Scavenging ◽

Liver Microsomes ◽

Thiobarbituric Acid ◽

Benzimidazole Derivatives ◽

Rat Liver Microsomes ◽

Inhibitory Effects ◽

Stable Free Radical ◽

Radical Scavenging Properties

Antioxidant and radical scavenging properties of a series of 2-[4-(substituted piperazin-/ piperidin-1-ylcarbonyl)phenyl]-1H-benzimidazole derivatives were examined. Free radical scavenging properties of compounds 11-30 and 33 were evaluated for the stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) and superoxide anion radical. In addition the inhibitory effects on the NADPH-dependent lipid peroxidation levels were determined by measuring the formation of 2-thiobarbituric acid reactive substances (TBARS) using rat liver microsomes. Compound 33 which has a p-fluorobenzyl substitutent at position 1 exhibited the strongest inhibition (83%) of lipid peroxidation at a concentration of 10-3 M, while the nonsubstituted analogue 13 caused 57% inhibition. This result is fairly consistent with the antimicrobial activity results against both Staphylococcus aureus and Candida albicans.

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Evaluation of the Antioxidant Effects of Some Flavonylthiazolidinediones by Determining Their Effects on Lipid Peroxidation, Superoxide Anion Formation, and 2,2-Diphenyl-1-picrylhydrazyl Stable Free Radical

Biological and Pharmaceutical Bulletin ◽

10.1248/bpb.27.912 ◽

2004 ◽

Vol 27 (6) ◽

pp. 912-915 ◽

Cited By ~ 4

Author(s):

Meral Tuncbilek ◽

Benay Can Eke ◽

Gülgün Ayhan-Kilcigil ◽

Tülay Çoban ◽

Mümtaz Iscan

Keyword(s):

Lipid Peroxidation ◽

Free Radical ◽

Superoxide Anion ◽

Stable Free Radical ◽

Anion Formation ◽

Antioxidant Effects

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Metabolism-induced free radical activity does not contribute significantly to loss of viability in moist-stored recalcitrant seeds of contrasting species

New Phytologist ◽

10.1046/j.1469-8137.2000.00757.x ◽

2000 ◽

Vol 148 (2) ◽

pp. 267-276 ◽

Cited By ~ 16

Author(s):

VALERIE GREGGAINS ◽

WILLIAM E. FINCH-SAVAGE ◽

W. PAUL QUICK ◽

NEIL M. ATHERTON

Keyword(s):

Free Radical ◽

Recalcitrant Seeds ◽

Free Radical Activity

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Free radical activity and hemostatic factors in NIDDM patients with and without microalbuminuria

Diabetes ◽

10.2337/diabetes.41.8.909 ◽

1992 ◽

Vol 41 (8) ◽

pp. 909-913 ◽

Cited By ~ 37

Author(s):

A. Collier ◽

A. Rumley ◽

A. G. Rumley ◽

J. R. Paterson ◽

J. P. Leach ◽

...

Keyword(s):

Free Radical ◽

Hemostatic Factors ◽

Free Radical Activity ◽

Niddm Patients

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Esr Indication of Heavy Metal Contamination of Urban Atmosphere

Water Science & Technology ◽

10.2166/wst.1993.0559 ◽

1993 ◽

Vol 27 (7-8) ◽

pp. 263-269 ◽

Cited By ~ 1

Author(s):

B. Iosefzon-Kuyavskaya ◽

N. Myrlyan ◽

A. Shames

Keyword(s):

Heavy Metal ◽

Air Pollution ◽

Electron Spin Resonance ◽

Free Radical ◽

Metal Contamination ◽

Heavy Metal Contamination ◽

Urban Atmosphere ◽

Stable Free Radical ◽

Spin Resonance ◽

Line Characteristic

Electron Spin Resonance (ESR) was used for the examination oi dust samples collected from snow in an urban area. On the main doublet ESR line attributed to the signal of paramagnetic metals, a singlet line characteristic for stable free radical centers (FRC) was observed. A negative correlation of significant level between FRC signal intensity and heavy metal (HM) content was established. It was shown that FRC line intensity of dust may be used as a surrogate parameter for the estimation of air pollution by HM.

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Microwave-Assisted Synthesis, Characterization, Antimicrobial and Antioxidant Activity of Some New Isatin Derivatives

Journal of Chemistry ◽

10.1155/2013/192039 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 16

Author(s):

G. Kiran ◽

T. Maneshwar ◽

Y. Rajeshwar ◽

M. Sarangapani

Keyword(s):

Antioxidant Activity ◽

Free Radical ◽

Radical Scavenging ◽

Microwave Assisted Synthesis ◽

Stable Free Radical ◽

Ft Ir ◽

Antimicrobial And Antioxidant Activity ◽

New Compounds ◽

Isatin Derivatives

A series of β-Isatin aldehyde-N,N′-thiocarbohydrazone derivatives were synthesized and assayed for theirin vitroantimicrobial and antioxidant activity. The new compounds were characterized based on spectral (FT-IR, NMR, MS) analyses. All the test compounds possessed a broad spectrum of activity having MIC values rangeing from 12.5 to 400 μg/ml against the tested microorganisms. Among the compounds3e,3jand3nshow highest significant antimicrobial activity. The free radical scavenging effects of the test compounds against stable free radical DPPH (α,α-diphenyl-β-picryl hydrazyl) and H2O2were measured spectrophotometrically. Compounds3j,3n,3l, and3e, respectively, had the most effective antioxidant activity against DPPH and H2O2scavenging activity.

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