Lipids active in biological systems demonstrate a broad range of behavior in water, from hydrocarbons which are insoluble, to molecules such as bile salts that possess potent detergent properties and interact with water rather dynamically. The purpose of this paper is to describe some of the physical properties of lipids with respect to their inter— action with aqueous systems, and to classify ...

The use of organic solvents in the chemical industry for gas-liquid absorption or liquid-liquid extraction operations is still unavoidable. search “greener” to replace fossil-based counterparts a challenge scientific community. Biocompatible ionic liquids (bio-ILs) emerged as sustainable approach development greener processes. In this work, bio-ILs based on choline common cation are evaluated p...

A predictive version of the UNIQUAC model is proposed for the description of the nonideality of paraffinic solid solutions. With this model, and using only pure component properties, is possible to adequately predict the phase behavior of complex hydrocarbon mixtures. Both liquid and solid phase compositions as well as the fraction of crystals in a partly frozen solution show a good agreement w...

In the past, HSE’s Health and Safety Laboratory (HSL) has studied the performance of a variety of passive fire protection (PFP) materials in protecting a part-filled LPG tank subjected to hydrocarbon pool fire engulfment. However, this is only one potential fire incident scenario that can threaten a process vessel; another is a jet fire, perhaps resulting from an ignited release from a leaking ...

Recently, a number of endophytic fungi have been discovered that produce volatile organic compounds (VOCs) whilst growing on agricultural waste substrates, whose chemistry is best defined as hydrocarbon and hydrocarbon-like. These compounds have potential use as both 'green chemicals' and fuels. This report discusses the discovery of the first fungus proposed as a producer of 'Mycodiesel'. Also...

Buried hydrocarbon deposits, such as liquid petroleum, represent an abundant source of reduced carbon for microbes. It is not surprising therefore that many organisms have adapted to an oily, anaerobic life deep underground, often at high temperatures and pressures, and that those organisms have had, and in some cases continue to have, an effect on the quality and recovery of the earth’s dimini...

Bacillus subtilis SR1 is a heavy metal-resistant, polyaromatic hydrocarbon-degrading bacterium isolated from rhizospheric soil of contaminated sites. It has the ability to promote plant growth and utilize benzo[a]pyrene as a carbon source. This study reports the characteristics of the genome of B. subtilis SR1, which contains one circular chromosome (4,093,698 bp).

Cuticular hydrocarbons of larvae of individual strains of the Anopheles gambiae sensu stricto were investigated using gas liquid chromatography. Biomedical discriminant analysis involving multivariate statistics suggests that there was clear hydrocarbon difference between the Gambian(G3), the Nigerian (16CSS and, its malathion resistant substrain, REFMA) and the Tanzanian (KWA) strains. The hig...

Preparative high pressure liquid chromatography on US-Y zeolite shape-selective molecular sieve was studied for carbon isotopic fractionation e€ects. We tested a standard mixture [17b, 21b(H)-hopane, 5a-cholestane] and complex natural hydrocarbon mixtures dominated by tetraand pentacyclic triterpenoids extracted from Oxford Clay shales. We con®rmed that steroids and hopanoids were separated on ...

Due to the increased use of crude oil and other oil-related products, a large amount waste is produced discharged into environment. These wastes contain toxic heavy metals petroleum hydrocarbon lead further deterioration terrestrial aquatic ecosystems. Their increasing amounts residual leachates are considered main obstacle restoring contaminated environments. Biosurfactants compounds having hi...