A molecule-based characterization methodology was developed for correlation and prediction of assays and properties for crude oil and petroleum fractions. From readily accessible crude oil, the assay data such as distillation curve, API gravity, and PNA contents, identifies an optimal set of chemical compositions of model hydrocarbon molecules that were designed to mimic measurable physical and...

Various types of cyanobacterial mats were predominant in a wetland, constructed for the remediation of oil-polluted residual waters from an oil field in the desert of the south-eastern Arabian Peninsula, although such mats were rarely found in other wetland systems. There is scarce information on the bacterial diversity, spatial distribution and oil-biodegradation capabilities of freshwater wet...

background and objectives : the aim of this study was to evaluate the chemical composition and antimicrobial activity of satureja hortensis and trachyspermum copticum essential oils against different kinds of microorganisms in vitro. material and methods : the antimicrobial activity was evaluated by micro broth dilution assay and analysis of essential oils chemical composition by gc and gc/ms a...

Role of microbes in bioremediation of oil spills has become inevitable owing to their eco friendly nature. This study focused on the isolation and characterization of bacterial strains with superior oil degrading potential from crude-oil contaminated soil. Three such bacterial strains were selected and subsequently identified by 16S rRNA gene sequence analysis as Corynebacterium aurimucosum, Ac...

INTRODUCTION Dorema glabrum is an endangered species that grow in Transcaucasia and North West of Iran. The plant has extensive uses e.g. as an herbal remedy or food additive in these regions. The chemical composition of hydrodistilled oil of D. glabrum growing in Iran was analyzed by GC-MS for the first time. METHODS The essential oil of air-dried roots was obtained by hydrodistillation usin...

Research work was carried out to investigate the physicochemical analysis of olive oil extracted from olives grown in Khyber pakhtunkhwa. The samples were studied for physicochemical characteristics (Specific gravity, refractive index, Acid value, Saponification value and Peroxide value). The free fatty acidity is thus a direct measure of the quality of the oil. Olive oil was analysed for fatty...

francoeuria undulata (l.) lack is often synonymous with two species of the genus pulicaria,i.e. pulicaria undulata (l.) c.a. mey and pulicaria crispa (forssk.) olive, which are oftenincluded under the genus francoeuria. the essential oil yield and compositions in the fivenatural populations of francoeuria undulata from fars province in southern iran weredetermined by gc and gc/ms analysis. the ...

A study was carried out in the comparative analysis of ethanolic extract (50%) of clove & clove oil as natural antimicrobial agents on some food spoilage bacteria. The antibacterial activity of clove oil & its extract (50% ethanol) was tested against ten bacteria (seven Gram positive & three Gram negative) & seven fungi by agar well diffusion assays. The clove oil was found to be better antagon...

The aim of this study was to determine the main constituents of the essential oil isolated from Fortunella crassifolia Swingle peel by hydro-distillation, and to test the efficacy of the essential oil on antimicrobial activity. Twenty-five components, representing 92.36% of the total oil, were identified by GC-MS analysis. The essential oil showed potent antimicrobial activity against both Gram...

The experiments were carried out to study the kinetics of mentha oil extraction from mentha leaves (Mentha arvensis L.) and the quality analysis was carried out for the oil extracted. The oil was extracted from mentha leaves at three different moisture contents of 74.30 per cent (fresh leaves), 42.30 per cent (shade dried) and 19.35 per cent (sun dried) using hydro distillation method. Various ...