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  • 1
    Electronic Resource
    Electronic Resource
    Comparative study of the responses of bovine and mouse intestinal mucosa to iron-dependent lipid peroxidation
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part B: Biochemistry and 103 (1992), S. 817-819 
    Details
    ISSN: 0305-0491
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-0491(92)90198-Z
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  • 2
    Electronic Resource
    Electronic Resource
    A novel oxidation reaction. A correction
    Amsterdam : Elsevier
    Tetrahedron Letters 4 (1963), S. 523 
    Details
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(01)90665-3
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  • 3
    Electronic Resource
    Electronic Resource
    A novel oxidation reaction
    Amsterdam : Elsevier
    Tetrahedron Letters 3 (1962), S. 1071-1072 
    Details
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)70960-9
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of α tocopherol, all-trans retinol and retinyl palmitate on the non enzymatic lipid peroxidation of rod outer segments (1999)
    Springer
    Molecular and cellular biochemistry 197 (1999), S. 173-178 
    Details
    ISSN: 1573-4919
    Keywords: lipid-peroxidation ; rod outer segments ; α tocopherol ; all-trans retinol ; retinyl palmitate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The effect of α tocopherol, all-trans retinol and retinyl palmitate on the non enzymatic lipid peroxidation induced by ascorbate-Fe2+ of rod outer segment membranes isolated from bovine retina was examined. The inhibition of light emission (maximal induced chemiluminescence) by α tocopherol, all-trans retinol and retinyl palmitate was concentration dependent. All trans retinol showed a substantial degree of inhibition against ascorbate-Fe2+ induced lipid peroxidation in rod outer segment membranes that was 10 times higher than the observed in the presence of either α tocopherol or retinyl palmitate. Inhibition of lipid peroxidation of rod outer segment membranes by α tocopherol and retinyl palmitate was almost linear for up to 0,5 μmol vitamin/mg membrane protein, whereas all-trans retinol showed linearity up to 0,1 μmol vitamin/mg membrane protein. Incubation of rod outer segments with increasing amounts of low molecular weight cytosolic proteins carrying 1-[14C] linoleic acid, [3H] retinyl palmitate or [3H] all-trans retinol during the lipid peroxidation process produced a net transfer of ligand from soluble protein to membranes. Linoleic acid was 4 times more effectively transferred to rod outer segment membranes than all-trans retinol or retinyl palmitate. Incubation of rod outer segments with delipidated low molecular weight cytosolic proteins produced inhibition of lipid peroxidation. The inhibitory effect was increased when the soluble retinal protein fraction containing a tocopherol was used. These data provide strong support for the role of all-trans retinol as the major retinal antioxidant and open the way for many fruitful studies on the interaction and precise roles of low molecular weight cytosolic retinal proteins involved in the binding of antioxidant hydrophobic compounds with rod outer segments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006926605402
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  • 5
    Electronic Resource
    Electronic Resource
    Interaction of rat liver microsomes containing saturated or unsaturated fatty acids with fatty acid binding protein: Peroxidation effect (1994)
    Springer
    Molecular and cellular biochemistry 137 (1994), S. 135-139 
    Details
    ISSN: 1573-4919
    Keywords: fatty acids ; microsomes ; peroxidation ; chemiluminescence ; fatty acid binding protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract In the studies described here rat liver microsomes containing labeled palmitic, stearic, oleic or linoleic acids were incubated with fatty acid binding protein (FABP) and the rate of removal of14C-labeled fatty acids from the membrane by the soluble protein was measured using a model system. More unsaturated than saturated fatty acids were removed from native liver microsomes incubated with similar amounts of FABP. Thein vitro peroxidation of microsomal membranes mediated by ascorbate-Fe++, modified its fatty acid composition with a considerable decrease of the peroxidizability index. These changes in the microsomes facilitated the removal of oleic and linoeic acids by FABP, but the removal of palmitic and stearic acids was not modified. This effect is proposed to result from a perturbation of membrane structure following peroxidation with release of free fatty acids from susceptible domains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00944075
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  • 6
    Electronic Resource
    Electronic Resource
    Vitamin A inhibits lipoperoxidation ascorbate-Fe++ dependent of rat kidney microsomes and mitochondria (1996)
    Springer
    Molecular and cellular biochemistry 165 (1996), S. 121-125 
    Details
    ISSN: 1573-4919
    Keywords: lipoperoxidation ; microsomes ; mitochondria ; rat kidney
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract In the present study it was investigated if Vitamin A supplementation could protect rat kidney microsomes and mitochondria from in vitro lipoperoxidation. After incubation of rat kidney microsomes and mitochondria in an ascorbate-Fe++ system, at 37°C during 60 min, it was observed that the total cpm/mg protein originated from light emission (chemiluminescence) was lower in those organelles obtained from the control group when compared with the vitamin A supplemented group. The fatty acid composition of microsomes and mitochondria from control group was profoundly modified when subjected to nonenzymatic lipoperoxidation with a considerable decrease of arachidonic acid, C20:4 (n-6) and docosapentaenoic acid, C22:5 (n−3) in mitochondria and docosahexaenoic acid C22:6 (n-3) in microsomes.As a consequence the peroxidizability index, a parameter based on the maximal rate of oxidation of specific fatty acids was higher in the supplemented animals than in those used as control. These results indicate that Vitamin A may act as antioxidant protecting rat kidney microsomes and mitochondria from deleterious effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229473
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  • 7
    Electronic Resource
    Electronic Resource
    Lipoperoxidation of rod outer segments of bovine retina is inhibited by soluble binding proteins for fatty acids (1998)
    Springer
    Molecular and cellular biochemistry 178 (1998), S. 181-186 
    Details
    ISSN: 1573-4919
    Keywords: retina ; lipoperoxidation ; rod outer segments ; docosahexanoic acid ; fatty acid binding protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract In the present study it was investigated if soluble-binding proteins for fatty acids (FABPs) present in neural retina show protection from in vitro lipoperoxidation of rod outer segment membranes (ROS). After incubation of ROS in an ascorbate-Fe++ system, at 37°C during 90-120 min, the total cpm originated from light emission (chemiluminescence) was found to be lower in those membranes incubated in the presence of soluble binding proteins for fatty acids. The fatty acid composition of rod outer segment membranes was substantially modified when subjected to non-enzymatic lipoperoxidation with a considerable decrease of docosahexaenoic acid (22:6 n-3) and arachidonic acid (20:4 n-6). As a result of this, the unsaturation index, a parameter based on the maximal rate of oxidation of specific fatty acids was higher in the native and control membranes when compared with peroxidized ones. A similar decrease of chemiluminescence was observed with the addition of increasing concentrations of native or delipidated FABP retinal containing fractions to rod outer segment membranes. These results indicate that soluble proteins with fatty acid binding properties may act as antioxidant protecting rod outer segment membranes from deleterious effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006839413757
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  • 8
    Electronic Resource
    Electronic Resource
    Selective inhibition of the non-enzymatic lipid peroxidation of phosphatidylserine in rod outer segments by α-tocopherol (2000)
    Springer
    Molecular and cellular biochemistry 211 (2000), S. 39-45 
    Details
    ISSN: 1573-4919
    Keywords: lipid peroxidation ; rod outer segments ; α-tocopherol ; phosphatidylserine ; docosahexaenoic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract In the present study it was investigated if a-tocopherol shows protection against in vitro lipid peroxidation of phospholipids located in rod outer segment membranes (ROS). After incubation of ROS in an ascorbate-Fe2+ system, at 37°C during 160 min, the total cpm originated from light emission (chemiluminescence) was found to be lower in those membranes incubated in the presence of α-tocopherol. The fatty acid composition of total lipids isolated from rod outer segment membranes was substantially modified when subjected to non-enzymatic lipid peroxidation with a considerable decrease of docosahexaenoic acid (22:6 n-3). The incorporation of α-tocopherol (0.35 μmol/mg protein) produce a 43.37% inhibition of the lipid peroxidation process evaluated as chemiluminiscence (total cpm originated in 160 min). The phospholipid species containing the highest amount of docosahexaenoic acid: phosphatidyletanolamine and phosphatidylserine were more affected than phosphatidylcholine during the lipid peroxidation process. Not all phospholipids, however, were equally protected after the addition of α-tocopherol to the incubation medium. Phosphatidylcholine and phosphatidyletanolamine, were not protected by α-tocopherol, the vitamin provides selective antioxidant protection only for phosphatidylserine. These results indicate that α-tocopherol may act as antioxidant protecting rod outer segment membranes from deleterious effect by a selective mechanism that diminishes the loss of docosahexaenoic acid from phosphatidylserine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007146313657
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  • 9
    Electronic Resource
    Electronic Resource
    Vitamin A supplementation inhibits chemiluminescence and lipid peroxidation in isolated rat liver microsomes and mitochondria (1996)
    Springer
    Molecular and cellular biochemistry 154 (1996), S. 77-82 
    Details
    ISSN: 1573-4919
    Keywords: Vitamin A ; rat liver ; microsomes ; mitochondria ; peroxidation chemiluminescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract In the present study we investigated if administration of vitamin A could protect rat liver microsomes and mitochondria from in vitro peroxidation. Appreciable decrease of chemiluminescence and lipid peroxidation was measured in microsomal membranes from rats receiving vitamin A, with respect to control animals. In membranes derived from control animals, the fatty acid composition was profoundly modified when subjected to in vitro peroxidation mediated by ascorbate-Fe++, with a considerable decrease of 20:4 n6 and 22:6 n3 in mitochondria and 18:2 n6 and 20:4 n6 in microsomes. As a consequence the peroxidizability index, a parameter based on the maximal rate of oxidation of specific fatty acids was higher in supplemented animals than in control group when both kind of membranes were analyzed. These changes were less pronounced in membranes derived from rats receiving vitamin A. These results are in agreement with previous results that indicated that vitamin A may act as an antioxidant protecting membranes from deleterious effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248464
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  • 10
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    Dual unification of bi-class support vector machine formulations (2006)
    Elsevier
    Details
    Publication Date: 2006-07-01
    Print ISSN: 0031-3203
    Electronic ISSN: 1873-5142
    Topics: Computer Science
    Published by Elsevier
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