نتایج جستجو برای: hydrocarbon refining

تعداد نتایج: 31970  

Journal: :AMB Express 2021

Abstract Biosurfactants are amphiphilic molecules composed of a hydrophilic and hydrophobic moiety had the ability to penetrate into different phases reduce surface tension. This features caused oil recovery, lubrication facilities crude in pipeline. In current research Biosurfactant-producing strain was isolated from storage tanks Isfahan Oil Refining Company Iran, screened by expansion test, ...

2016
AMECHI S. NWANKWEGU

Sawdust evaluation in bioremediation of PMS hydrocarbon polluted agricultural soil was carried out. The effect of different parameters; total petroleum hydrocarbon, dehydrogenase activity, optical density and pH on bioremediation performance were evaluated. Studied parameters such as microbial dynamics and hydrocarbon removal were found to be higher in sawdust amended system and differed signif...

2015
Wen-rui Shi Chong Zhang Yu-long Chen

The drilling time data of gas logging are used to calculate drilling time ratio of the reservoir, and the total hydrocarbon data are used to calculate hydrocarbon contrast coefficient and to establish the drilling time ratio--hydrocarbon contrast coefficient crossplot. The standards of distinguishing the boundaries of hydrocarbon zones, hydrocarbonaceous water layers and dry layers are determin...

2013
Adeel Ansari Abas B Md Said Seema Ansari Muhammad Rauf

In this paper, simulations are performed to reaffirm the relationship between the resistivity and the thickness of the Hydrocarbon reservoir by considering double layers of Hydrocarbon in seabed logging application. In order to establish this correlation, various simulation models are carried out using Computer Simulation Technology (CST) tool and the results obtained from each simulation is pl...

2003
J. Martín M. E. Rodríguez

The Technical University of Madrid (UPM) and REPSOL YPF are collaborating in the improvement in the estimation of the emiss ion factors for refinery flares. Flaring is an unavoidable process in the refining activity, both for safety reasons during upset processes (start-up, shut down, system blow-down) and when managing the disposal of waste gases with hydrocarbon from routine operations. The o...

Journal: :Molecules 2013
Wing-Nga Sit Chun-Wo Chan Wing-Yiu Yu

A palladium(II)-catalyzed ortho-benzoxylation of 2-arylpyridines with aryl acylperoxides was developed. With pyridyl as directing group, the benzoxylation reaction exhibits remarkable regioselectivity and excellent functional group tolerance, providing the products in up to 87% yield.

Journal: :Journal of environmental sciences 2007
Hui Li Ying Zhang Irina Kravchenko Hui Xu Cheng-gang Zhang

With 110-d incubation experiment in laboratory, the responses of microbial quantity, soil enzymatic activity, and bacterial community structure to different amounts of diesel fuel amendments were studied to reveal whether certain biological and biochemical characteristics could serve as reliable indicators of petroleum hydrocarbon contamination in meadow-brown soil, and use these indicators to ...

2010
Ivo Krka

In this thesis, I propose a holistic approach for capturing, analyzing, and refining behavioral requirements of a software system by synthesizing, analyzing, and refining Modal Transition Systems in a scalable manner.

2017
Lin Cheng Long Qian Guo-Sheng Wang Xiao-Mei Li Xiang-Pei Li

The goal of this study was to evaluate the potential relationship among polymorphisms of aromatic hydrocarbon receptor, aromatic hydrocarbon receptor repressor, and rheumatoid arthritis (RA) susceptibility as well as the association among the polymorphisms of aromatic hydrocarbon receptor, aromatic hydrocarbon receptor repressor, and their expression.We performed a hospital-based, case-control ...

2012
Shelby J Sturgis Deborah M Gordon

In many animal species, the propensity for aggression is linked to social context. In social insects, aggressive interactions between colonies are related to the assessment of cuticular hydrocarbon profiles. We investigated how, in the red harvester ant, Pogonomyrmex barbatus, an individual ant's task environment contributes to its hydrocarbon profile, and how task-specific differences in profi...

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