The electrochemical behavior of a modified carbon paste electrode (MCPE) with N,N′ethylenbis(salicylideneiminato)copper(II) complex ([Cu(II)-Salen]) was investigated as a newsensor for cystein. The Britton-Robinson buffer with pH 5, 10% modifier in electrode, potentialscanning rate of 20 mVs-1 and puls height of 50 mV were used as the optimum condition for thedetermination of cysteine using car...

In recent decades, three generations of thiomers have been developed with the main purpose obtaining enhanced interactions mucosal tissues. Therefore, many different types thiolated ligands generated and attached to polymeric backbones. The aim this study was synthesize all directly compare their properties regarding mucus penetration mucoadhesion. Starting from pectin, unprotected thiomer pect...

Objective: Polyphenol oxidase or PPO (EC 1.14.18.1) is considered the enzyme responsible for quality deterioration and browning in different fruits during postharvest period. The objective of this study was to evaluate the antibrowning (inhibition of polyphenol oxidase activity) effect of Cysteine, Ascorbic acid, citric acid, kojic acid and glycine at two different pH (6 and 7) in  hawthorn. Me...

Background: S-methyl cysteine (SMC) is a hydrophilic cysteine-containing compound naturally found in garlic and onion. The purpose of the present study was to investigate the protective effect of SMC on oxidative stress, inflammation and insulin resistance in an experiment of metabolic syndrome.Methods: Male Wistar rats were divided into five groups (6 rats in each group), namely; control, cont...

The liver is an essential organ in the body for detoxification drugs and toxic substances. present study was designed to investigate hepatoprotective effects of L-Cysteine, Ursodeoxycholic acid (Ursoflor), Silymarin against carbon tetrachloride-induced injury rats. Twenty adult male rats were used this work; they randomly divided into five groups (4 rats/group). first group served as control re...

background: s-methyl cysteine (smc) is a hydrophilic cysteine-containing compound naturally found in garlic and onion. the purpose of the present study was to investigate the protective effect of smc on oxidative stress, inflammation and insulin resistance in an experiment of metabolic syndrome. methods: male wistar rats were divided into five groups (6 rats in each group), namely; control, con...

We have found previously that astrocytes can provide cysteine to neurons. However, cysteine has been reported to be neurotoxic although it plays a pivotal role in regulating intracellular levels of glutathione, the major cellular antioxidant. Here, we show that cysteine toxicity is a result of hydroxyl radicals generated during cysteine autoxidation. Transition metal ions are candidates to cata...

Rats were fed diets with and without 0.5% L-cysteine supplement for 14 d or shorter periods to clarify the mechanism by which dietary cysteine elicits its hypohomocysteinemic effect. Cysteine supplementation significantly decreased plasma homocysteine concentration with an increase in plasma cysteine concentration in rats fed 10% casein diet (10C) or 15% soybean protein diet (15S) but not in ra...