Results 31 to 40 of about 2,344,690 (238)

Microbial Biodegradation of Paraffin Wax in Malaysian Crude Oil Mediated by Degradative Enzymes

Frontiers in Microbiology, 2020
The deposition of paraffin wax in crude oil is a problem faced by the oil and gas industry during extraction, transportation, and refining of crude oil. Most of the commercialized chemical additives to prevent wax are expensive and toxic.
Nur Aina Adlan, S. Sabri, M. Masomian, M. Ali, R. Rahman   +4 more
semanticscholar   +1 more source

Remediation of Crude Oil-Polluted Soil by the Bacterial Rhizosphere Community of Suaeda Salsa Revealed by 16S rRNA Genes

International Journal of Environmental Research and Public Health, 2020
Crude oil pollution of soil is a serious environmental issue, and bioremediation using plants and microorganisms is a natural and sustainable method for its restoration.
Yilei Yu, Yinghua Zhang, N. Zhao, J. Guo, Weigang Xu, Muyuan Ma, Xiaoxia Li   +6 more
semanticscholar   +1 more source

Closer is more important: The impact of Chinese and global macro-level determinants on Shanghai crude oil futures volatility

Quantitative Finance and Economics
Using the GARCH-MIDAS model, we investigated the impact of Chinese and global macro-level determinants on the return volatility of Shanghai crude oil futures, covering Chinese and global economic policy uncertainty, Chinese and global crude oil demand as
Xiaoling Yu , Kaitian Xiao , Javier Cifuentes-Faura   +2 more
doaj   +1 more source

Decomposing and reconstructing dynamic risks in the crude oil market based on the VMD and Lempel–Ziv algorithms

Electronic Research Archive, 2022
Crude oil markets have become increasingly uncertain. To study them, we first employ the decomposition-ensemble framework based on the variational mode decomposition (VMD) and Lempel–Ziv algorithms to assess the crude oil dual attributes. Three steps are
Hao Dong , Zhehao Huang
doaj   +1 more source

Improvement design of existing threshing machine at Kilang Sawit Risda, Ulu Keratong [PDF]

, 2020
Palm oil is very important in the agricultural and economic sectors in Malaysia. It’s origin is in the tropical rain forest region of West Africa, which the main belt runs through the southern latitudes of Cameron, Cote D’ ivoire, Ghana, Liberia, Nigeria,
Chen, Chit Wee, Gelau, Daryl, Mahmood, Salwa, Mohd Rafli, Izzat Emeer, Ngadiman, Nor Hasrul Akhmal, Ramlan, Ikhsan Mustain, Tajurahim, Nurul Ainina Nadhirah, Ting, Joseph Zhi Ho, Yahaya, Mohamad Amirul Ashraf   +8 more
core   +2 more sources

Crude Oil Hedging Strategies Using Dynamic Multivariate GARCH [PDF]

The paper examines the performance of four multivariate volatility models, namely CCC, VARMA-GARCH, DCC and BEKK, for the crude oil spot and futures returns of two major benchmark international crude oil markets, Brent and WTI, to calculate optimal ...
Chang, C-L., McAleer, M.J., Tansuchat, R.   +2 more
core   +4 more sources

Petroleum Depletion Property and Microbial Community Shift After Bioremediation Using Bacillus halotolerans T-04 and Bacillus cereus 1-1

Frontiers in Microbiology, 2020
Bioremediation of crude oil contaminated environments is an economical, low-maintenance, environmentally friendly technology and has attracted increasing attention in recent years.
Zhenshan Deng, Yingying Jiang, Kaikai Chen, Fei Gao, Xiaodong Liu   +4 more
doaj   +1 more source

How does stock market volatility react to oil shocks?

, 2017
We study the impact of oil price shocks on the U.S. stock market volatility. We jointly analyze three different structural oil market shocks (i.e., aggregate demand, oil supply, and oil-specific demand shocks) and stock market volatility using a ...
Bastianin, Andrea, Manera, Matteo
core   +1 more source

Geochemical Characteristics and Origins of the Crude Oil of Triassic Yanchang Formation in Southwestern Yishan Slope, Ordos Basin

International Journal of Analytical Chemistry, 2017
Biomarker compounds that derived from early living organisms play an important role in oil and gas geochemistry and exploration since they can record the diagenetic evolution of the parent materials of crude oil and reflect the organic geochemical ...
Xiaoli Zhang, Jinxian He, Yande Zhao, Hongchen Wu, Zeqiang Ren   +4 more
doaj   +1 more source

A systematic review in crude oil markets: Embarking on the oil price

Green Finance, 2019
Crude oil plays an important role in economic activities, with both commodity attributes and financial characteristics. Through comprehensive review of the literature on crude oil prices, the following phenomena are presented.
Yuhang Zheng, Ziqing Du
doaj   +1 more source