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antioxidant action of organic sulphites iii. antioxidative

Antioxidant action of organic sulphites III. Antioxidative ... Antioxidant action of organic sulphites III. Antioxidative effect of esters of sulphurous acid in hydrocarbons and polypropylene ... A comparison of the antioxidative characteri

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Antioxidant action of organic sulphites III. Antioxidative ...

Antioxidant action of organic sulphites III. Antioxidative effect of esters of sulphurous acid in hydrocarbons and polypropylene ... A comparison of the antioxidative characteristics of the examined sulphites with those of the underlying phenols and the commercial antioxidant BHT shows, that the latter have lesser oxygen uptake rates, ...

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Antioxidant action of organic sulphites III. Antioxidative ...

Aromatic sulphites caused occurrence of induction periods and considerably reduced oxygen uptake rates. The thermooxidative decomposition of hydrocarbons and polymers was retarded. The rate constants of the reaction of organic sulphites with peroxyl radicals were determined and compared with those of the appropriate phenols.

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Antioxidant action of organic sulphites. III. Antioxidative effect ...

Article “Antioxidant action of organic sulphites. III. Antioxidative effect of esters of sulphurous acid in hydrocarbons and polypropylene.” Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and ...

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Antioxidant action of organic sulphites—I. Esters of ...

This is shown in Fig. 2 for the decomposition of these hydroperoxides by diphenyl sulphite (Fdz). During the reaction of organic sulphites with Antioxidant action of organic sulphites 211 O 10 20 30 40 umin Fig. 1. Reaction of organic sulphites (0.05 M) with CHP (0.25 M) in chlorobenzene at 75. Fig. 3.

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Antioxidant action of organic sulfites—II. Esters of ...

Antioxidant action of organic sulfitesI 391 Alkyl sulfites and aromatic sulfites with aliphatic 3. Hammond, G. S., Sen, J. N. and Boozer, C. E., J. Chem. side chains act mainly as a hydrogen donors in the soc-' 1955' 77' 3244- reactions with alkoxyl and peroxyl radicals. 4- Bamford,G Barb;.G Janklns' A-0- and onyon, r P. F.,

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Antioxidant Action of Organic Sulfites | Request PDF

Request PDF | On Jan 1, 2001, W. D. Habicher and others published Antioxidant Action of Organic Sulfites | Find, read and cite all the research you need on ResearchGate

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Antioxidant action of organic sulfites—II. Esters of ...

Abstract The effect of esters of sulfurous acid as primary antioxidants was examined. Different aliphatic, aromatic, open-chain and cyclic sulfites were synthesized. The reactions of organic sulfites with RO 2 and RO radicals, the chain carriers of the autoxidation of hydrocarbons and polymers, were simulated by means of the thermal decomposition of azobisisobutyronitrile (AIBN) in the ...

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Antioxidant action of organic sulphites-I. Esters of ...

The efficiency of esters of sulphurous acid as secondary antioxidants has been studied. Several aliphatic as well as aromatic open-chain and cyclic sulphites were synthesized and reacted with tert-butyl-, cumene- and α-tetralin hydroperoxides. All sulphites investigated decompose hydroperoxides in a nonradical way. This reaction proceeds in two steps: in a slow redox reaction and a rapid ...

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Polymer Degradation and Stability | Vol 64, Issue 1, Pages ...

Antioxidant action of organic sulphites III. Antioxidative effect of esters of sulphurous acid in hydrocarbons and polypropylene A. Günther, T. König, W.D. Habicher, K. Schwetlick

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Oxidative Stress and Antioxidant Defense

Reactive oxygen species (ROS) are produced by living organisms as a result of normal cellular metabolism. At low to moderate concentrations, they function in physiological cell processes, but at high concentrations, they produce adverse modifications to cell components, such as lipids, proteins, and DNA.1–6 The shift in balance between oxidant/antioxidant in favor of oxidants is termed ...

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Antioxidant Action of Organic Sulfites | Request PDF

Request PDF | On Jan 1, 2001, W. D. Habicher and others published Antioxidant Action of Organic Sulfites | Find, read and cite all the research you need on ResearchGate

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Antioxidant action of organic sulphites—I. Esters of sulphurous acid as secondary antioxidants

The efficiency of esters of sulphurous acid as secondary antioxidants has been studied. Several aliphatic as well as aromatic open-chain and cyclic sulphites were synthesized and reacted with tert-butyl-, cumene- and α-tetralin hydroperoxides. All sulphites investigated decompose hydroperoxides in a nonradical way. This reaction proceeds in two steps: in a slow redox reaction and a rapid ...

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Antioxidant action of organic sulphites—I. Esters of sulphurous acid as secondary ...

Antioxidant action of organic sulphites—I. Esters of sulphurous acid as secondary antioxidants; Add time:08/03/2019 Source:sciencedirect.com. The efficiency of esters of sulphurous acid as secondary antioxidants has been studied. Several aliphatic as well as aromatic open-chain and cyclic sulphites were synthesized and reacted with tert-butyl ...

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Oxidative Stress and Antioxidant Defense

GSH is highly abundant in all cell compartments and is the major soluble antioxidant. GSH/GSSG ratio is a major determinant of oxidative stress. GSH shows its antioxidant effects in several ways.94 It detoxifies hydrogen peroxide and lipid peroxides via action of GSH-Px.

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Antioxidant - an overview | ScienceDirect Topics

B. Daramola, G.O. Adegoke, in Nuts and Seeds in Health and Disease Prevention, 2011 Mechanism of antioxidant action. Antioxidants can be divided into three groups by their mechanism: (1) primary antioxidants, which function essentially as free radical terminators (scavengers); (2) secondary antioxidants, which are important preventive antioxidants that function by retarding chain initiation ...

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[The antioxidative mechanism of action of organic fractions of certain therapeutic peloids]

[The antioxidative mechanism of action of organic fractions of certain therapeutic peloids] Vopr Kurortol Fizioter Lech Fiz Kult. 1969;34(1):17-21.

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Methods for testing antioxidant activity - Analyst (RSC Publishing) DOI:10.1039/B009171P

Applications which illustrate the potential of spin trapping methods in antioxidant action include the determination of the antioxidant potential of tea extracts in aqueous and organic media, 211 assessing the antioxidant contribution of quercetin and other flavanols to the antioxidant capacity of red wines, 212 specific assays for the hydroxyl ...

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Study of the mechanisms of antioxidative action of different antioxidants

Study of the mechanisms of antioxidative action of different antioxidants Ispitivanje mehanizama antioksidativnog dejstva različitih antioksidanata Marković Z.

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Antioxidant, antidiarrheal, hypoglycemic and thrombolytic activities of organic and aqueous ...

Hopea Odorata, locally known as Telsur (Bangladesh), has some traditional uses as folk medicine. This study aims to investigate the antioxidant, antidiarrheal, hypoglycemic and thrombolytic activities of H. odorata leaf extracts as new therapeutic prospects predicting the activity of some of the isolated compounds of this plant. Leaves of Hopea odorata was extracted with pure methanol (MEHO ...

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Antioxidants | Free Full-Text | Antioxidants versus Food Antioxidant Additives and Food ...

The basis of antioxidant action, the doses required for preservation, and the overall antioxidant action are revisited in this work. Finally, the bad and the good of food additives/preservatives are presented, taking into account the main mediator of antioxidant beneficial actions, namely the innate mechanisms of detoxification.

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Antioxidant action of organic sulphites—I. Esters of ...

Antioxidant action of organic sulphites—I. Esters of sulphurous acid as secondary antioxidants; Add time:08/03/2019 Source:sciencedirect.com. The efficiency of esters of sulphurous acid as secondary antioxidants has been studied. Several aliphatic as well as aromatic open-chain and cyclic sulphites were synthesized and reacted with tert-butyl ...

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[The antioxidative mechanism of action of organic ...

[The antioxidative mechanism of action of organic fractions of certain therapeutic peloids] Vopr Kurortol Fizioter Lech Fiz Kult. 1969;34(1):17-21.

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Oxidative Stress and Antioxidant Defense

GSH is highly abundant in all cell compartments and is the major soluble antioxidant. GSH/GSSG ratio is a major determinant of oxidative stress. GSH shows its antioxidant effects in several ways.94 It detoxifies hydrogen peroxide and lipid peroxides via action of GSH-Px.

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Antioxidant - an overview | ScienceDirect Topics

B. Daramola, G.O. Adegoke, in Nuts and Seeds in Health and Disease Prevention, 2011 Mechanism of antioxidant action. Antioxidants can be divided into three groups by their mechanism: (1) primary antioxidants, which function essentially as free radical terminators (scavengers); (2) secondary antioxidants, which are important preventive antioxidants that function by retarding chain initiation ...

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Methods for testing antioxidant activity - Analyst (RSC ...

Applications which illustrate the potential of spin trapping methods in antioxidant action include the determination of the antioxidant potential of tea extracts in aqueous and organic media, 211 assessing the antioxidant contribution of quercetin and other flavanols to the antioxidant capacity of red wines, 212 specific assays for the hydroxyl ...

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Comparative Antioxidant Activity of Maillard- and Oxidized ...

The antioxidative activity of nonenzymatically browned proteins produced by reaction with both carbohydrates and oxidized lipids was studied to compare the effect of formation of Maillard reaction products (MRP) and oxidized lipid/amino acid reaction products (OLAARP) in the stabilities of foods during processing and storage. Bovine serum albumin (BSA) was incubated at 80 °C for 24 h in the ...

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Analytical Methods Used in Determining Antioxidant ...

F.T. Pastor et al. (2020) examined the applicability of the reduction reaction of Fe(III) to Fe(II) by the antioxidants in order to develop the electrochemical method of determining antioxidant activity, applying direct current polarography and cyclic voltammetry.

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Review of Methods to Determine Antioxidant Capacities ...

Antioxidant capacity is related with compounds capable of protecting a biological system against the potentially harmful effect of processes or reactions involving reactive oxygen and nitrogen species (ROS and RNS). These protective effects of antioxidants have received increasing attention within biological, medical, nutritional, and agrochemical fields and resulted in the requirement of ...

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Antioxidant, antidiarrheal, hypoglycemic and thrombolytic ...

Hopea Odorata, locally known as Telsur (Bangladesh), has some traditional uses as folk medicine. This study aims to investigate the antioxidant, antidiarrheal, hypoglycemic and thrombolytic activities of H. odorata leaf extracts as new therapeutic prospects predicting the activity of some of the isolated compounds of this plant. Leaves of Hopea odorata was extracted with pure methanol (MEHO ...

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(PDF) Vitamin E: Mechanism of Its Antioxidant Activity

The antioxidant activity of vitamin E (alpha-tocopherol) has its property due to its ability to react mainly with the peroxyl radical (HOH • ) and singlet oxygen ( 1 O 2 ), which favors lipid ...

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