The studies focused on the effect of the addition of low concentrations of glucose - a substrate that is readily subject to microbiological degradation, on the rate of biodegradation of petroleum products. Glucose in concentration 1% was introduced into mineral medium containing 3% crude oil, with or without bacterial inoculum. The rate of degradation of crude oil in the individual cultures was...

Brazil is made up of diverse population and a vast land. The Natives who were the original inhabitants of Brazil included the Carib and Arawak groups in the north, the Gas in eastern and southern Brazil, the Tupı́Guaranı́s in the East Coast of Brazil and in the Amazon River valley, and the Panos in the west. For the most part these groups of natives were essentially seminomadic, who subsisted by ...

Abstract Background Traumatic tympanic membrane (TM) perforations usually heal spontaneously. The aim of this study was to investigate whether the topical application Triticum Vulgare (TV) in experimentally induced traumatic TM rats has a positive effect on wound healing process. Methods were randomly assigned four experimental groups. Drugs introduced twice day for 7 days. On 7th day, specimen...

Both soil and water become contaminated by oil and oil derivatives due to accidental spills in their exploitation, transportation, processing, storing and utilization. In 2010, 3.91 billion tons of crude oil was produced (BP Statistical Review, 2011) and estimations are that annually 0.1% of produced petroleum is released into the environment (Ward et al., 2003) as a result of anthropogenic act...

Much public attention has been focused on the energy industries in recent years, particularly the electric generation and petroleum industries. This attention is connected to concerns of global warming and the exhaustion of finite natural resources, with the related question of how to optimally meet our nation’s energy needs. One particular point that has received significant attention is the i...

Use of defoaming agents in the pulp and paper industry has evolved over time from use of simple petroleum based products such as kerosene to the state of the art free rinsing silicone emulsions offered by StarChem, LLC. The introduction of new processes and equipment along with the advancement of the defoamer chemistries employed has necessitated different application strategies to maximize pro...

An integrated fuzzy-stochastic risk assessment (IFSRA) approach was developed in this study to systematically quantify both probabilistic and fuzzy uncertainties associated with site conditions, environmental guidelines, and health impact criteria. The contaminant concentrations in groundwater predicted from a numerical model were associated with probabilistic uncertainties due to the randomnes...

PURPOSE Published case-control studies of risks of leukaemia following low exposures to benzene in the distribution of petroleum (gasoline) have not all identified the same level of risk, but the studies have had differences in cohort inclusion, case determination and availability of occupational and lifestyle data. We reviewed the quality and comparability of the data from three (of four) stud...

Oil, petroleum, hydrocarbon — words that have become popular in our modern-day vernacular, but what do they really mean to us? What is oil? How does it form? Where do we find it? How do we look for it? Do we really need it? Why? Are we actually running out? Does its use damage our environment? These are all good questions, but some of the answers are not quite so simple. This issue of Rock Talk...

Corporate social responsibility information disclosure's late start in China, both in quantity and quality needs to be improved. This shell and PetroChina from 2013 respectively published by the sustainability report for analysis, according to disclosure forms, content, management bodies and the guidelines for the preparation of the report compared the four aspects. Recommended China Petroleum ...