Biomass allocation is an important plant trait that responds plastically to environmental heterogeneities. However, the effects on this trait of pollutants owing to human activities remain largely unknown. In this study, we investigated the response of biomass allocation of Phragmites australis to petroleum pollution by a ¹³CO₂ pulse-labelling technique. Our data show that plant biomass signifi...

Background: The contamination of ecosystem with petroleum and its derivatives is con‌sidered as one of the most crucial environmental threat in Iran. Application of micro‌organisms has been demonstrated as an appropriate and more practical alternative to clean-up petroleum hydrocarbons in the contaminated environments. Objectives: The objectives of this study were isolating r...

The recent study by O’Reilly et al. [1] describing the identification of 197 esters likely related to the biodegradation of petroleum hydrocarbons in 61 groundwater samples from 10 fuel release sites in California lacks evidence that these compounds have a “low toxicological profile,” which is the argument used by the authors to promote the routine use of silica gel cleanup. The detection ofmor...

It is notable that over the past decade, proven reserves of natural gas have dramatically increased as higher prices and advances in technology have turned previously unrecoverable resources into major sources of domestic production. Moreover, the decline in crude oil reserves has significantly slowed over the past decade. Therefore, there would be an end to the conventional hydrocarbon resourc...

in present study, the density functional theory (dft-b3lyp) method with svp basis set was used for optimizing and studying the electronic structural properties of cis and trans isomers of bis-(5-nitro-2h-tetrazolato-n2) tetraammine cobalt (iii) perchlorate (bncp) as powerful explosives at 298.15 k temperature and 1 atmosphere pressure. and also, natural bond orbital (nbo) population analysis an...