𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Linoleic Acid Oxidation Catalysed by Various Amino Acids and Cupric Ions in Non-Aqueous Media

✍ Scribed by Farag, R. S. ;Osman, S. A. ;Hallabo, S. A. S. ;Girgis, A. N. ;Nasr, A. A.

Publisher
John Wiley and Sons
Year
1980
Weight
447 KB
Volume
82
Category
Article
ISSN
0931-5985

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The effect of amino acids under the present investigation on linoleic acid oxidation in non‐aqueous media has shown feature of an autocatalytic chain reaction and possessed minor antioxidant behaviour except cysteine. The antioxidant effect might be attributed to the absence of protonated amino nitrogen. Linoleic acid alone had an induction period of 15 hr and on the addition of various α‐amino acids, the systems had an induction period ranged from 16–19 hr. This increase did not exhibit any specific function for the studied amino acids. Cysteine exceptionally possessed pro‐oxidant effect and that was due to the role of HS‐group. The addition of copper at concentrations of 10^−5^ M and 10^−3^ M to the model systems composed of linoleic acid and various α‐amino acids in non‐aqueous media have shown to exhibit minor and highly pro‐oxidant effects respectively. The pro‐oxidant effect of these amino acids in the presence of copper might be due to amino acids‐copper complexes.

📜 SIMILAR VOLUMES

Cotton Seed Oil Oxidation Catalysed by A
Cotton Seed Oil Oxidation Catalysed by Amino Acids and Albumin in Aqueous and Non-Aqueous Media
✍ Farag, R. S. ;Osman, S. A. ;Hallabo, S. A. S. ;Nasr, A. A. 📂 Article 📅 1981 🏛 John Wiley and Sons ⚖ 472 KB 👁 1 views

## Abstract The oxidation of refined cotton seed oil catalysed by various α‐amino acids and albumin have been studied in aqueous and non‐aqueous media. Cysteine, phenylalanine and albumin possessed pro‐oxidant effect in cotton seed oil in aqueous and non‐aqueous media. Serine exhibited pro‐oxidant

Kinetic and Mechanistic Studies on the O
Kinetic and Mechanistic Studies on the Oxidation of Nitrogen(III) (HNO2/) by the Tris(biguanide)manganese(IV) Ion in Aqueous Acidic Media
✍ Amit Das; Subrata Mukhopadhyay 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 German ⚖ 124 KB 👁 2 views

## Abstract The kinetics of a net two‐electron transfer between an authentic Mn^IV^ complex, [Mn(bigH)~3~]^4+^ (__Fig. 1__; bigH = biguanide = C~2~N~5~H~7~), and nitrite in aqueous solution in the pH interval 2.00–3.60 is described. Stoichiometric data for the reaction clearly indicates Δ[Mn^IV^]/Δ