background organic solvents are widely used in cell biology experiments. despite increasing the solubility, they have some moderate toxic effects. therefore, selecting the appropriate solvent along with the use of suitable concentration insures the accuracy and reliability of experimental results. objectives the current study aimed to examine the cytotoxic effects of some organic solvents on va...

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 e...

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 e...

Owing to recent innovation in molecular biological techniques, nucleic acid data are becoming more and more important in ecology, systematics, evolutionary biology and conservation biology. Moreover, DNA sequence comparison is a powerful tool to study genetic relatedness of species, which can be used to estimate branching order of phylogenetic trees as well as evolutionary distance between both...

Article history: Received on: 05/02/2014 Revised on: 26/02/2014 Accepted on: 19/03/2014 Available online: 27/05/2014 The present study was aimed to assess the plants antimicrobial effects such as Tamarisk, March, acetone and mango kernel. The aqueous and ethanol extract of the plants and also its smoke was prepared in concentrations of 50 and 25 mg/mL. The bacteria Staphylococcus aureus, Strept...

The Tg.AC mouse is being evaluated for use in short-term carcinogenicity bioassays. Because the dermal test protocol necessitates dissolving test agents we determined the effects of several solvents on responsiveness of hemizygous mice to dermal applications of the classical skin tumor promoter. phorbol 12-myristate 13-acetate (TPA). Mice of both sexes received dermal applications of either ace...

Specimens to be plastinated are often moist which necessitates the removal of tissue fluid (dehydration) before forced impregnation or plastination can be carried, out. Dehydration removes the specimen fluid (water), as well as, some fat. The tissue fluid is replaced with an organic solvent. To be a dehydrating agent, the solvent must be miscible with water and may consist of a variety of chemi...

Background The formation of by-products, mainly acetone in acetone-butanol-ethanol (ABE) fermentation, significantly affects the solvent yield and downstream separation process. In this study, we genetically engineered Clostridium acetobutylicum XY16 isolated by our lab to eliminate acetone production and altered ABE to isopropanol-butanol-ethanol (IBE). Meanwhile, process optimization under pH...

Ethanol is known to exert a synergistic effect on the toxicity of benzene. In the present investigation it was found that benzene was metabolized at a rate 20-65-fold higher in liver microsomes from ethanolor acetonetreated rats than in microsomes from control animals. One high affinity site \Ka = 19 ±5 (SD) urn] and one low affinity site [K„ = 0.3 ±0.1 IIIM| for benzene metabolism were pre...