Chemical Analysis and Study of Phenolics, Antioxidant Activity, and Antibacterial Effect of the Wood and Bark ofMaclura tinctoria(L.) D. Don ex Steud.

Abstract

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 were higher in wood when compared with bark levels. The antioxidant activity of wood extracts (IC50 = 18.7 μg/mL) was more effective than that of bark extracts (IC50 = 20.9 μg/mL). Wood and bark extracts revealed a high potential for inhibition of aerobic and anaerobic bacteria. The bark extracts were the most active (MIC from 20 to 60 μg/mL). Both antioxidant activity and high potential for bacteria inhibition turn these extracts promising for drug formulations, especially as antibacterial agent.

Evaluation of the antioxidant activities of different bio-oils and their phenolic distilled fractions for wood preservation

“…This result means that, the antioxidant activities of raw bio-oils are directly related to the concentrations of phenolic compounds. This result in good agreement with previous reported studies and indicates the role of phenolic compounds in increasing the antioxidant activity of different wood species (Anis et al, 2012;Lamounier et al, 2012;Rosales-Castro et al, 2015;Willfoer et al, 2003). The ability of the phenolic compounds in improve the antioxidant activity arises from the ability of these compounds to react with the hydroxyl radicals (OH • ), thus, causing oxidation of the wood and accordingly impeding the attack of radicals to the wood (Mohan et al, 2008;Schultz et al, 2005).…”

LEAF MICROSCOPIC CHARACTERS OF Maclura tinctoria (L.) D. DON EX STEUD., MORACEAE

“…Nesta análise, revelaram a presença de compostos fenólicos e lipofílicos, em concordância com os grupos de compostos químicos relatados por vários autores para M. tinctoria (EL-SOHLY et al, 1999, 2001GROWEISS, CARDELLINA II, BOYD, 2000;CIOFFI et al, 2003;LAMOUNIER et al, 2012).…”

Antioxidant, Antimicrobial and Cytotoxic Activities of <i>Desmodium Motorium</i> Merr.

“…The free radical scavenging activity of the plant extractives on the stable radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) were estimated by the method of Brand-Williams [7,8]. Here, 2.0 ml of a methanol solution of the samples at different concentration were mixed with 3.0 ml DPPH solution in methanol (20 μg/ml).…”