نتایج جستجو برای: aromatic hydrocarbons

تعداد نتایج: 56917  

2010
T. Yeom Sung Kyun Kwan

The biodegradability of polycyclic aromatic hydrocarbons such as naphthalene, fluorene, anthracene and phenanthrene by a halotolerant bacterial consortium isolated from marine environment was investigated. The polycyclic aromatic hydrocarbons degrading bacterial consortium was enriched from mixture saline water samples collected from Chennai (Port of Chennai, salt pan), India. The consortium po...

2009
Yoon-Jae Song

Using a novel pine needle agar, fifteen bacterial species were isolated from pine litter. These bacteria were able to degrade aromatic hydrocarbons derived from lignin and utilize the ortho-cleavage of the β-ketoadipate pathway to degrade protocatechuate or catechol. A different utilization array of aromatic hydrocarbons by these bacteria was also determined. This study provides the information...

Journal: :thrita 0
mohammad mahdi zamani students' scientific research center, tehran university of medical sciences, tehran, ir iran; department of anesthesiology and critical care, tehran university of medical sciences, tehran, ir iran malihe fallahpour environment faculty, tehran university of medical sciences, tehran, ir iran golnaz yousefi harvani students' scientific research center, tehran university of medical sciences, tehran, ir iran samaneh khodi aghmiuni students' scientific research center, tehran university of medical sciences, tehran, ir iran mahsa zamani department of management, payame noor university, karaj, ir iran dariush minai tehrani faculty of biological sciences, shahid beheshti university of medical sciences, tehran, ir iran

results the soil was largely composed of silt and clay (silt:41 - 42%, clay: 40 - 43%, sand: 15 - 18%). the average moisture content of the saturated soil was 12.96%,; average electricity conductivity was 18.64 dsm-1; average ph of the paste was 8.36; and average percentage of organic carbon was 0.19%. result of the laboratory analysis reported the average content of total nitrogen as 0.026%, p...

Journal: :Journal of molecular microbiology and biotechnology 2008
Julia Foght

Aromatic hydrocarbons contaminate many environments worldwide, and their removal often relies on microbial bioremediation. Whereas aerobic biodegradation has been well studied for decades, anaerobic hydrocarbon biodegradation is a nascent field undergoing rapid shifts in concept and scope. This review presents known metabolic pathways used by microbes to degrade aromatic hydrocarbons using vari...

Journal: :Journal of Chemical Education 2004

Journal: :Journal of chromatography 1990
S N Lanin Nikitin YuS

The possibility of regulating the retention and selectivity of monoalkyl- and polymethyl-substituted aromatic hydrocarbons in normal-phase high-performance liquid chromatography was investigated by modifying the non-polar (hexane) mobile phase with halide derivatives of hydrocarbons. Dichloromethane, chloroform, carbon tetrachloride and ethyl bromide were employed as modifiers. The decrease in ...

Journal: :Bulletin of environmental contamination and toxicology 2009
S Fu H X Cheng Y H Liu X J Xia X B Xu

A total of 10 surface soil samples representing the entire area of Linfen City were collected and analyzed for the presence of 16 polycyclic aromatic hydrocarbons. The total polycyclic aromatic hydrocarbon concentration ranged from 1.1 to 63.7 microg g(-1). Analysis of the sources of contamination revealed that polycyclic aromatic hydrocarbons in the soil were derived from combustion sources. S...

2009
Kathleen Bennett

Introduction Gasoline is a complex solution of different hydrocarbons. Naturally occurring petroleum contains aromatic hydrocarbons, a class of unsaturated hydrocarbons that includes benzene, toluene, ethylenzene, and xylene (collectively known as BTEX). Since the EPA banned lead additions to gas in 1973, aromatic hydrocarbons were added to increase the octane concentration, thereby maximizing ...

2014
D. Ramirez J. Dussan

Petroleum exploitation in oilfields, especially drilling, generates an oily sludge mixed with hydrocarbons and mineral solids. This oily sludge is sometimes treated by bioremediation and phytoremediation. This investigation established that landfarmed oil sludge provided adequate soil conditions to grow jack beans (Canavalia ensiformis) that in turn rhizoand phytoremediated residual aliphatic a...

Journal: :IARC monographs on the evaluation of carcinogenic risks to humans 2010

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