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...

introduction: macrophomina phaseolina is the causal agent of soybean charcoal rot. this disease is one of the most prevalent and destructive of soybean in the north of iran. this pathogen has broad host range and invades more than 500 plant species of 75 families, such as caprifoliaceae. symptoms on stems appear as silver-gray lesions near the base, which eventually decay the stem. plants show ...

To elucidate seasonal changes in hydrocarbons including polycyclic aromatic hydrocarbons (PAHs) due to oil spill, tissues of blue crab (Callinectes sapidus) were investigated. Total petroleum hydrocarbons (n-alkanes) concentrations ranged from 0.17-0.32μg/gdw and 0.28-0.62μg/gdw during the dry and wet seasons respectively. The tissues accumulate a complex spectrum dominated by heavier hydrocarb...