Heterogeneity of Ascorbate Free Radical Reductase in the Human Lens

2002 ◽  
pp. 143-149 ◽  
Author(s):  
M. Bando ◽  
H. Obazawa ◽  
M. Takehana
Keyword(s):  
Free Radical ◽  
Human Lens ◽  
Ascorbate Free Radical

scholarly journals Ascorbate Free-Radical Reduction by Glyoxysomal Membranes

1990 ◽  
Vol 94 (2) ◽  
pp. 531-537 ◽  
Author(s):  
Mark l. Bowditch ◽  
Robert P. Donaldson
Keyword(s):  
Free Radical ◽  
Ascorbate Free Radical ◽  
Radical Reduction

scholarly journals Chilling Stress Protection in Cucumber: A Role for Antioxidants?

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 645a-645
Author(s):  
David A. French ◽  
Kirk L. Parkin
Keyword(s):  
Ascorbic Acid ◽  
Free Radical ◽  
Tissue Damage ◽  
Chilling Stress ◽  
Storage Life ◽  
Ascorbate Free Radical ◽  
Stress Protection ◽  
Endogenous Antioxidants ◽  
Intermittent Warming

To examine the role of endogenous antioxidants in providing chilling stress protection, field-grown cucumber (Cucumis sativus L. cv. Eureka) fruit were stored in the dark and evaluated throughout storage. Storage treatments included continuous chilling (C) (5°C), continuous tempering (T) (12°C), intermittent warming (IW) (1 day at 12°C every 4 days) for 1, 2, 3, or 4 cycles, and preconditioning (PC) (12°C for 4 or 8 days) before chilling. Fruit exposed to in-field chilling (FC) were also stored under continuous chilling at 5°C. Samples were evaluated visually for tissue damage (lack of exudate, water-soaked appearance), and ascorbic acid (Asc) and reduced (GSH) and oxidized (GSSG) glutathione levels and glutathione reductase (GtR) and ascorbate free radical reductase (AFRR) activities were determined. Each 4 days of PC extended storage life by 7 days relative to C. FC or 1–2 IW cycles also extended storage life relative to C. With all treatments, Asc depletion preceded visual tissue damage, whereas GSH, GtR, and AFRR were not depleted before such damage. GSSG levels remained low throughout storage. GtR activity was elevated by FC and IW. AFRR activity was elevated by all treatments. Asc levels were elevated initially by all treatments, with this elevation lasting longer with PC and T. These results suggest that Asc levels decline during stress in the absence of an obvious lesion in the Asc regeneration scheme.

NADH-ascorbate free radical and -ferricyanide reductase activities represent different levels of plasma membrane electron transport

1993 ◽  
Vol 25 (4) ◽  
pp. 411-417 ◽  
Author(s):  
J. M. Villalba ◽  
A. Canalejo ◽  
J. C. Rodr�guez-Aguilera ◽  
M. I. Bur�n ◽  
D. James Morr� ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Free Radical ◽  
Electron Transport ◽  
Ferricyanide Reductase ◽  
Ascorbate Free Radical ◽  
Plasma Membrane Electron Transport ◽  
Different Levels

Protective effects of vitamins C and E on the number of micronuclei in lymphocytes in smokers and their role in ascorbate free radical formation in plasma

2001 ◽  
Vol 34 (3) ◽  
pp. 209-219 ◽  
Author(s):  
Matthias Schneider ◽  
Kerstin Diemer ◽  
Karin Engelhart ◽  
Heinrich Zankl ◽  
Wolfgang E. Trommer ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Formation ◽  
Protective Effects ◽  
Ascorbate Free Radical ◽  
Free Radical Formation

The onset of cell proliferation is stimulated by ascorbate free radical in onion root primordia

1993 ◽  
Vol 77 (2) ◽  
pp. 231-233 ◽  
Author(s):  
Rafael C Cabo ◽  
José A Gonzalez-Reyes ◽  
Plácido Navas
Keyword(s):  
Cell Proliferation ◽  
Free Radical ◽  
Root Primordia ◽  
Onion Root ◽  
Ascorbate Free Radical
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