نتایج جستجو برای: natural oil
تعداد نتایج: 612080 فیلتر نتایج به سال:
Introduction: Replacingfuel oil with natural gas in brick kilns is one of the effective ways to reduce air pollution as well as the cost of the furnaces maintenance. The aim of this study isto estimate reduction of air pollutants resulting from brick kilns functioning with natural gasin Yazdprovince. Methods: In this descriptive-survey research, we estimated consumption of the fuel oil in the ...
This paper presents results of experimental investigations on natural esters dielectric and coolant fluids regarding the breakdown strength. The breakdown voltage (BDV) for small and medium oil gaps (from 2 mm up to 40 mm) under AC and lightning impulse (LI), uniform and non-uniform electrical field is measured. Experiments involve new, aged and with mineral oil contaminated natural esters. The...
The aim of this paper is to examine the impact of temperature shock on both near-month and far-month natural gas and heating oil futures returns by extending the weather and storage models of the previous study. Several notable findings from the empirical studies are presented. First, the expected temperature shock significantly and positively affects both the near-month and far-month natural g...
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Polyols were synthesized from epoxidized natural oils and tetrahydrofuran through ring opening copolymerization catalyzed by Lewis acid. The properties of these polyols depend on the type of natural oils as well as the reaction conditions (monomer concentration, catalyst amount, reaction temperature and reaction time). These polyols were evaluated as a raw material for making polyurethane (PU) ...
Resource managers are concerned that offshore oil platforms in the Southern California Bight may be contributing to environmental contaminants accumulated by marine fishes. To examine this possibility, 18 kelp bass (Paralabrax clathratus), 80 kelp rockfish (Sebastes atrovirens), and 98 Pacific sanddab (Citharichthys sordidus) were collected from five offshore oil platforms and 10 natural areas ...
One way to achieve economic growth is to invest in leading sectors. In addition, economic sectors can stimulate economic growth in other regions through the effects of spillover and feedback on their output. The purpose of this study is to identify the leading sectors, the effects of spillover and feedback on Oil-rich region. For this purpose, the two-region input-output table of Iranchr('39')s...
introduction: in this study, the chemical composition and antimicrobial activity of essential oil of ziziphora clinopodiodes and its potential application as a natural preservative in reducing the indigenous microbial population of hamburger were investigated. method: essential oil of ziziphora clinopodiodes cultivated in iran was obtained by hydro-distillation method (hdm). chemical compositio...
When wind speeds are 2-10 m s-1, reflective contrasts in the ocean surface make oil slicks visible to synthetic aperture radar (SAR) under all sky conditions. Neural network analysis of satellite SAR images quantified the magnitude and distribution of surface oil in the Gulf of Mexico from persistent, natural seeps and from the Deepwater Horizon (DWH) discharge. This analysis identified 914 nat...
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