Results 71 to 80 of about 733,980 (168)
Emergence of Turbulent Epochs in Oil Prices [PDF]
, 2018 Oil price data have a complicated multi-scale structure that may vary with time. We use time-frequency analysis to identify the main features of these variations and, in particular, the regime shifts. The analysis is based on a wavelet-based decomposition and analysis of the associated scale spectrum.
arxiv +1 more source
Progress of nanopreparation technology applied to volatile oil drug delivery systems
HeliyonTraditional Chinese medicine volatile oil has a long history and possesses extensive pharmacological activity. However, volatile oils have characteristics such as strong volatility, poor water solubility, low bioavailability, and poor targeting, which ...
Zu-Wen Ye +9 more
doaj
Cyclical properties of supply-side and demand-side shocks in oil-based commodity markets [PDF]
arXiv, 2016 Oil markets profoundly influence world economies through determination of prices of energy and transports. Using novel methodology devised in frequency domain, we study the information transmission mechanisms in oil-based commodity markets. Taking crude oil as a supply-side benchmark and heating oil and gasoline as demand-side benchmarks, we document ...
arxiv
Value relevance of the components of oil and gas reserve quantity change disclosures of upstream oil and gas companies in the london stock exchange [PDF]
arXiv, 2020 The high level of risk and uncertainty in harnessing oil and gas reserves poses an accounting dilemma in the reporting of reserves quantity information; information which is critical and relied on by investors for decision making. Different studies have indicated that reserves disclosure information is fundamental to understanding the value of the firm.
arxiv
How does bad and good volatility spill over across petroleum markets? [PDF]
arXiv, 2014 We detect and quantify asymmetries in volatility spillovers using the realized semivariances of petroleum commodities: crude oil, gasoline, and heating oil. During the 1987--2014 period we document increasing spillovers from volatility among petroleum commodities that substantially change after the 2008 financial crisis.
arxiv
Química Nova, 2012 The volatile oils of Dalbergia frutescens were obtained by hydrodistillation on a Clevenger-modified apparatus for every month of one year and assessed on GC/MS and GC/FID detectors for qualitative and quantitative analyses.
Caroline Eliza Mendes +6 more
doaj +1 more source
Forecasting crude oil market volatility: can the Regime Switching GARCH model beat the single-regime GARCH models? [PDF]
arXiv, 2015 In order to obtain a reasonable and reliable forecast method for crude oil price volatility, this paper evaluates the forecast performance of single-regime GARCH models (including the standard linear GARCH model and the nonlinear GJR-GARCH and EGARCH models) and the two-regime Markov Regime Switching GARCH (MRS-GARCH) model for crude oil price ...
arxiv
Antibacterial Effect of Fixed and Volatile Oils against Gram-positive and Gram-negative Bacteria
Kurdistan Journal of Applied Research, 2019 Antibiotic resistance phenomena among pathogenic bacteria considered as a major health problem ?and associated with increased mortality or long-term hospitalization, which lead to open a new era by using ?plant and herbal extracts as an alternative ...
Tara Faiq M. Salih +3 more
doaj +1 more source
Plant Pathology Journal, 2015 Anthracnose caused by Colletotrichum gloeosporioides has been destructive during pepper fruit production in outdoor fields in Korea. In vitro antifungal activities of 15 different plant essential oils or its components were evaluated during conidial ...
J. Hong +5 more
semanticscholar +1 more source
Volatile compounds of myrtle (Myrtus communis L.) leaves and berries
Turkish Journal of Forestry, 2017 Plant volatile oils are used in different industrial areas with scientific and commercial purposes. In this case, plants having volatile compounds have always placed themselves in the center of research.
İlhami Emrah Dönmez, Halime Salman
doaj +1 more source