This study aimed to investigate the antibacterial activity of essential oils from Cupressus sempervirens (CSEO) and Eucalyptus globulus (EGEO) against clinical isolates of colistin-resistant E. coli and methicillin-resistant M. sciuri recovered from diseased food-producing animals in Tunisia.
View Article and Find Full Text PDFThe aim of the present study was to investigate the extraction and the characterization of a novel heteropolysaccharide from Tunisian halophyte (LmPS). We were also interested in its antioxidant, anti-inflammatory, and hepatoprotective effects on carbon tetrachloride (CCl)-induced liver injury in rats. LmPS physicochemical properties were evaluated by thin-layer chromatography (TLC), high-performance liquid chromatography (HPLC), thermogravimetric analysis (TGA), and UV absorption.
View Article and Find Full Text PDFThis study assessed the anti-inflammatory effect of thiamine (TA) in lipopolysaccharide-stimulated RAW264.7 cells and also assessed the preservative properties of TA in minced beef. TA demonstrated a concentration-dependent antimicrobial effect on microbial contaminants.
View Article and Find Full Text PDFThe current study explored the hepatoprotective and immunomodulatory effects of Linalool (Lin) against carbon tetrachloride (CCl )-induced toxicity in mice. Four study groups (n = 8 each) were used: (1) a negative control group and (2) a toxicity control group (single dose of CCl administered on day 14 as 1 mL/kg of CCL in 1% olive oil). Intraperitoneally (i.
View Article and Find Full Text PDFLipid transfer proteins (LTP) are members of the family of pathogenesis-related proteins (PR-14) that play a key role in plant defense mechanisms. In this study, a novel gene TdLTP4 encoding an antifungal protein from wheat (cv. Om Rabiaa) was cloned, overexpressed in Escherichia coli BL-21 (DE3) and enriched using ammonium sulfate fractionation.
View Article and Find Full Text PDFIron (Fe) is one of the essential nutrients for plant growth which is involved in several physiological functions. Hence, there are intensive efforts to improve plant tolerance to Fe deficiency, by genotypic screening and by the use of adapted physiological tools. The intend of the current study was to explore the seed priming effect with salicylic acid (SA 0.
View Article and Find Full Text PDFIn this research, the chemical composition and biological properties of Tunisian (EO) flowers were investigated. The antibacterial effect of EO toward some bacteria was assessed, alone and in combination with nisin. The major components of EO were α-pinene, 1,8-cineol, limonene, and linalool.
View Article and Find Full Text PDF(, Brassicaceae), commonly known as sweet alyssum, is an annual ornamental halophyte widely spread along the Tunisian seashore. leaf ethanol extract was tested in an experimental model of hepatotoxicity induced by carbon tetrachloride (CCl). extract was found to possess antioxidant activity by scavenging the DPPH radical (IC= 45 μg/mL), reducing/chelating iron ions and inhibiting liver lipid peroxidation induced by FeSO.
View Article and Find Full Text PDFAldose reductase (AR) is an enzyme implicated in the development of diabetes complications among them diabetic retinopathy. Erythrocyte AR activity was measured in control and diabetic a type-2 diabetic model. We noticed an increase of AR activity in diabetic Meriones by comparison to controls.
View Article and Find Full Text PDFAstaxanthin (ATX) is a marine carotenoid known for its powerful antioxidant and neuroprotective properties. In this study, we investigated the in vitro and in vivo potential inhibitory effect of ATX on the aldose reductase (AR) activity, a key enzyme in the polyol pathway responsible for the pathogenesis of diabetic complications including diabetic retinopathy (DR). The gerbil (), an animal model for type 2 diabetes and DR has been used.
View Article and Find Full Text PDFThe present study evaluates the chemical profiling of the essential oil of a halophyte, (EO), and its protective potential against CCl-induced oxidative stress in rats. Forty compounds have been identified in EO. The major components are α-pinene (3.
View Article and Find Full Text PDFL. (Myrtle) is one of the most important aromatic and medicinal species from the Myrtaceae family. It is traditionally used as antiseptic, disinfectant drug and hypoglycemic agent.
View Article and Find Full Text PDFThe present study aimed (1) to investigate the chemical composition as well as the anti-inflammatory properties and in vitro antioxidant activity of Citrus aurantium peel essential oil (pEOCa) and (2) to evaluate its potential effect in vivo. The main results showed that the major components of pEOCa are Limonene and Linalool. Additionally, DPPH scavenging ability and β-carotene bleaching inhibition tests confirmed the antioxidant capacity of pEOCa.
View Article and Find Full Text PDFWe study the composition of Tunisian laurel leaves essential oil (EO), the fatty acid composition of laurel seed fixed oil and the total phenolics, flavonoids and tannins of laurel leaves methanolic extract. We also evaluated its free radical scavenging activity by the DPPH test. The predominant chemical class in Tunisian Laurus nobilis leaves EO was represented by oxygenated monoterpenes accounting for 64.
View Article and Find Full Text PDFThe objective of this study is to explore the preventive effects of ethyl acetate fraction from leaf extract (EACA), associated with its phytochemical content, against the toxic impacts of acute exposure to carbon tetrachloride (CCl) in the liver of adult rats. HPLC analysis of ethyl acetate fraction from extract revealed eight compounds. Administration of a single dose of CCl caused hepatoxicity as monitored by an increase in lipid peroxidation (thiobarbituric acid reactive substances) and in protein carbonyl level but a decrease in antioxidant markers in the liver tissue.
View Article and Find Full Text PDFThis review covers literature data summarizing, on one hand, the chemistry of essential oils and, on the other hand, their most important activities. Essential oils, which are complex mixtures of volatile compounds particularly abundant in aromatic plants, are mainly composed of terpenes biogenerated by the mevalonate pathway. These volatile molecules include monoterpenes (hydrocarbon and oxygenated monoterpens), and also sesquiterpenes (hydrocarbon and oxygenated sesquiterpens).
View Article and Find Full Text PDFDrought is the main abiotic constraint that affects crop species behaviour regarding bio-chemical responses. The current study was conducted to examine the effect of water deficit on growth, phenolic and carotenoid contents as well as the antioxidant and antimicrobial activities of two Carthamus tinctorius varieties (Jawhara and 104) flowers. Hence, plants were treated with different levels of water deficit: control (100 %), moderate water deficit (50 %) and severe water deficit (25 %).
View Article and Find Full Text PDFBackground: The thermal stability of corn oil flavoured with thyme flowers was determined and compared with that of the original refined corn oil (control). The oxidative stability index (OSI) was measured and samples were exposed to heating (30 min at 150, 180 and 200 °C) and deep-frying (180 °C). Changes in peroxide value (PV), free fatty acid (FFA) content, specific absorptivity values (K(232) and K(270)), colour and chlorophyll, carotenoid and total phenol contents were monitored.
View Article and Find Full Text PDFSpirulina platensis (=Arthrospira platensis) is a tunisian strain which has been isolated for the first time in Oued Essed (Sousse, Sidi Bou Ali). Biomass evolution, proteins, chlorophylls and fatty acids composition of this alga were monitored by varying nitrogen concentrations in the culture medium. Nitrogen stress was provoked by adding sodium nitrate (NaNO3) in the culture medium with concentrations varying from 0 to 5 g/l.
View Article and Find Full Text PDFSpirulina platensis (Arthrospira platensis) is a Tunisian strain isolated for the first time, in Tunisia, in Oued Essed (Sidi Bou Ali, in Sousse region). Evolution of biomass, proteins, chlorophylls and fatty acids (FA) has been followed during Spirulina growth. Experiments were carried out by varying sodium chloride concentrations in the culture medium in a range from 1 g L(-1) (natural environment) to 60 g L(-1).
View Article and Find Full Text PDFPistachio (Pistacia vera L.) fruit is well known for its oleaginous and edible seed. Less information is available about the hull constituted by the epicarp and the mesocarp.
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