Dispersive liquid liquid microextraction (DLLME) combined with gas chromatography–mass spectrometry (GC–MS) was used for the extraction and determination of 13 polycyclic aromatic hydrocarbons (PAHs) in mineral water samples. In this procedure, the suitable combination of extraction solvent (500 µL chloroform) and disperser solvent (1000 µL acetone) were quickly injected into the water sample (...

background & aim: salvia officinalis is known as a traditional medicine for several diseases in countries like lebanon, syria, jordan, etc. in addition, s. officinalis has been subjected to several studies in a try to specify its medicinal effects. this study aims to evaluate the antimicrobial activity of this plant. the aim of the present research was to study antibacterial effects of s. o...

Solvent fractionation of high oleic-high stearic (HOHS) sunflower oil was studied to determine the best solvent to use (hexane or acetone) in terms of the operational parameters and properties of the final stearins. Acetone fractionation on two types of HOHS sunflower oils (N17 and N20) was carried out at temperatures from 5 to 10 °C using micelles with different oil/solvent ratios. Acetone was...

Aim: Bovine mastitis is the most economically important disease affecting dairy cattle worldwide from an economic, diagnostic and public-health point of view. The present study aimed to isolate and identify of bacteria causes mastitis in dairy cows and to evaluate the antibacterial activities of some selected medicinal plants extracts comparing antibiotics used in the treatment of mastitis in E...

Azaspiracids (AZAs) are secondary metabolites of Azadinium spinosum that can accumulate in shellfish and cause food poisoning when consumed. We describe here an analytical procedure for the determination of AZAs in cultures of A. spinosum with a focus on the formation of AZA methyl esters as artefacts during extraction and sample pre-treatment. A. spinosum cells were collected from bioreactor c...

Paper electrophoresisiswidely used in clinicalmedicine as a screening test for hyperlipidemia. It is a simple, reproducible procedure, but requires 36 h to complete. Aliquota of sera are electrophoresed 16-18 h, paper strips are dried for 30 mm, followedby overnightstaining(1, 2). Recently it was reported that stainingtime could be decreased to 2 h by using Oil Red 0 stain in acetone-water solv...

in this study antioxidant activity of the red algae (hypnea hamulosa) was investigated in the invitro condition. the measurement included total phenolic content, ferric reducing power, dpph radical scavenging activity and total antioxidant activity. seaweed samples with the ratio of 1:20 (algae: solvent) were extracted using conventional solvent extraction method for 24 hours. the applied solve...