Laccases are oxidases that contain several copper atoms, and catalyse single-electron oxidations of phenolic compounds with concomitant reduction of oxygen to water. The enzymes are particularly widespread in ligninolytic basidiomycetes, but also occur in certain prokaryotes, insects and plants. Depending on the species, laccases are involved in various biosynthetic processes contributing to ca...

Monilinia fructicola is a fungal pathogen responsible for fruit brown rot in many species of the Prunus genus. The use abiotic elicitors as phosphites being studied induction resistance an alternative to synthetic fungicides. aim this work was evaluate effect on content total phenols, chlorogenic acid and changes susceptibility M. peach fruits. Peach fruits cultivars Flordaking Elegant Lady wer...

Cigarette mainstream smoke (MS) contains a number of structurally diverse substituted phenols. Recent quantitative structure activity relationship (QSAR) studies on phenols show that substituted phenols with electron-releasing groups can form potentially toxic phenoxyl-free radicals. In contrast, substituted phenols with electron-withdrawing groups do not form phenoxyl-free radicals but exert t...

Peach [Prunus persica (L.) Bastch.] "cv. Flordaprince" fruits at commercial maturity were immersed in 0, 0.5, 1.0 and 1.5 mM salicylic acid (SA) solution for 10 min, stored at 0 ◦ C for 28 days, then moved to 20 ◦C for 3 days to simulate shelf life. Fruit weight losses, firmness, TSS, acidity, Vit.C, sugars, anthocyanin, total phenols and two enzymes namely peroxidase and polyphenol oxidase act...

Maclura tinctoria (L.) D. Don ex Steud. has one of the highest qualities among the coefficients for Brazilian woods (up to 9.6) and resistance rates equivalent to Indian teak (Tectona grandis). In this study, the macromolecular constituents and total phenols compounds as well as the antioxidant and antibacterial activities of this wood were evaluated. Total phenols and proanthocyanidin levels w...

The aim of this study was investigation of influence of different extracts addition on total phenols, anthocyanin content, antioxidant activity and percent of polymeric colour of blackberry juice during storage of 52 days at 4 °C. Anthocyanin content of control sample (blackberry juice without extracts addition) was 149.91 mg/L. Samples with addition of extracts (olive leaf, pine bark PE 5:1, p...

Natural antioxidants, such as fruits and vegetables, can neutralize an excess of free radicals in the organism prevent certain degenerative diseases. Blackberries are known to exhibit antioxidant properties, but this fruit is seldom consumed or commercialized Peru. The objective research study was determine total anthocyanins (TA), phenolic compounds (TPC) capacity lyophilized Rubus robustus C....

Simultaneous preconcentration of phenol, 2-chlorophenol, 3-chlorophenol, 4-chlorophenol, 2-nitrophenol, 4-nitrophenol, and 2,4-dinitrophenol was improved by using olive wood (OW) washed with ethanol then pyrolyzed at 200°C as preconcentrating sorbent. Various OW sorbents were prepared by either washing OW (with ethanol, ether, dichloromethane, tetrahydrofuran or n-hexane); or by pyrolysis (at 1...