purpose: to evaluate the anatomical and functional outcomes of using heavy silicone oil as an internal tamponade for complicated cases of retinal detachment associated with proliferative vitreoretinopathy involving inferior retinal quadrants methods: 55 eyes from 55 patients with complicated retinal detachments enrolled in this interventional case series study. all eyes underwent standard three...

background bivalves have been used to study pollution level caused by heavy metals due to their biological characteristics. bahrakan region includes bahrakansar, hendijan, norouz and soroush oil fields, and current information regarding sea management, especially from the protective aspect is very little. objectives this study aimed to assess region pollution with heavy metals. for this purpose...

BACKGROUND Biodegradation is a cheap and environmentally friendly process that could breakdown and utilizes heavy crude oil (HCO) resources. Numerous bacteria are able to grow using hydrocarbons as a carbon source; however, bacteria that are able to grow using HCO hydrocarbons are limited. In this study, HCO degrading bacteria were isolated from an Omani heavy crude oil field. They were then id...

The worldwide global demand for oil has grown by 150% since 1965 and 20% in the past 20 years to the current 80 million barrels per day, and is projected to grow by 50% more in the next 20 years [1]. The growth in global demand for oil comes at a time when the supply from relatively cheap conventional sources is declining, and reserves are not being replaced with new discoveries [2]. However, t...

The concentration of heavy metals in vegetable oils is an important criterion for the assessment of oil qualities with regard to freshness, keeping properties, storage and their influence on human nutrition and health. Trace heavy metals in vegetable oils are known to have an effect on the rate of oil oxidation. In this work, the contents of lead (Pb), cadmium (Cd), nickel (Ni), manganese (Mn),...

Building on the principles of structure-oriented lumping (SOL), chemistry-oriented lumping methods have been developed to describe the composition in tandem with the hydro-processing chemistry of heavy oils such as vacuum residue, de-asphalted oil, tar and bitumen. Recent advances in analytical chemistry have provided the necessary fundamental insights that are required to develop such models. ...

Parts of oil spills reach Iranian coastline along the Persian Gulf in the form of tar balls and scattered oilpatches. There are many published reports regarding oil spills reaching northern coasts of the Persian Gulf,but none report on the content of heavy metals associated with petroleum in sediments and plants ofcontaminated areas. This research was conducted to determine and map petroleum- r...

The need of heavy and unconventional crude oil as an energy source is increasing day by day, so does the importance of petroleomics: the pursuit of detailed knowledge of heavy crude oil. Crude oil needs techniques with ultra-high resolving capabilities to resolve its complex characteristics. Therefore, ultra-high resolution mass spectrometry represented by Fourier transform ion cyclotron resona...

The Dublin SURGE (Soil Urban Geochemistry) Project is Dublin's first baseline survey of heavy metals and persistent organic pollutants in topsoils and is part of a Europe-wide initiative to map urban geochemical baselines in ten cities. 1,058 samples were collected as part of a stratified random sampling programme in the greater Dublin area to give an overview of baseline conditions in the city...