نتایج جستجو برای: heavy crude oil
تعداد نتایج: 290418 فیلتر نتایج به سال:
Although planktonic protozoans are likely to interact with dispersed crude oil after a spill, protozoan-mediated processes affecting crude oil pollution in the sea are still not well known. Here, we present the first evidence of ingestion and defecation of physically or chemically dispersed crude oil droplets (1-86 μm in diameter) by heterotrophic dinoflagellates, major components of marine pla...
The seed and seed oil from sandbox, Hura crepitans were investigated to establish their composition and utility as a base material. Powdered seeds from H. crepitans were soxhlet-extracted with petroleum ether between 40-60°C to yield a golden-yellow oil. Proximate analyses and chemical characterization of the seed oil were carried out using the standard procedures of American Oil Chemist Societ...
OBJECTIVES This study was conducted to examine the relationship between crude oil exposure and physical symptoms among residents participating in clean-up work associated with the Hebei Spirit oil spill, 2007 in Korea. METHODS A total of 288 residents responded to a questionnaire regarding subjective physical symptoms, sociodemographic characteristics and clean-up activities that occurred bet...
spheric pressure ionization mass spectrometric analysis of new anionic surfactants: the alkylpolyglucoside esters. Journal of the American Oil Chemists’ Society 72: 1}9. Metcalfe LD (1962) Potentiometric titration of long chain amine oxides using alkyl halide to remove tertiary amine interference. Analytical Chemistry 34: 1849. Milwidsky BM and Gabriel DM (1982) Detergent Analysis. New York: Ha...
Crude oil plays an increasingly significant role in world economic development and also in the generation of wealth since nearly two-thirds of the world’s energy consumption comes from crude oil and natural gas. Worldwide consumption of crude oil exceeds $500 billion—roughly 10% of US GDP and crude oil is also the world’s largest and most actively traded commodity, accounting for about 10% of t...
This study proposes a multiple kernel learning (MKL)-based regression model for crude oil spot price forecasting and trading. We used a well-known trend-following technical analysis indicator, the moving average convergence and divergence (MACD) indicator, for extracting features from original spot prices. Additionally, we factored in the possibility that movements of target crude oil prices ma...
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