Results 41 to 50 of about 72,223 (314)
Separations, 2023 In this study, the process of steam distillation to collect volatile oils from Forsythia suspensa (F. suspensa) and Lonicera japonica (L. japonica) was optimized according to the concept of quality by design.
Xinying Chen +4 more
doaj +1 more source
Shipin yu jixie, 2022 Objective: Develop new natural characteristic plant tobacco flavor. Methods: The volatile oil from the seeds, leaves and stems of Pelargonium odoratissimum was extracted by simultaneous steam distillation solvent extraction （SDE）. The chemical components
YIN Hong-fei +9 more
doaj +1 more source
Leverage effect in energy futures [PDF]
Energy Economics 42, pp. 50-57, 2014, 2014 We propose a comprehensive treatment of the leverage effect, i.e. the relationship between returns and volatility of a specific asset, focusing on energy commodities futures, namely Brent and WTI crude oils, natural gas and heating oil. After estimating the volatility process without assuming any specific form of its behavior, we find the volatility to
arxiv +1 more source
IMF Working Papers, 1996 This paper examines the behavior of crude oil prices since 1980, and in particular the volatility of these prices. The empirical analysis covers “spot” prices for one of the key internationally traded crudes, namely Dated Brent Blend. A GARCH (generalized autoregressive conditional heteroscedastic) model, which allows the conditional variance to be ...
openaire +5 more sources
Volatility persistence in crude oil markets [PDF]
Energy Policy, 2014 Financial market participants and policy-makers can benefit from a better understanding of how shocks can affect volatility over time. This study assesses the impact of structural changes and outliers on volatility persistence of three crude oil markets - Brent, West Texas Intermediate (WTI) and Organization of Petroleum Exporting Countries (OPEC ...
Charles, Amélie, Darné, Olivier
openaire +7 more sources
Indonesian Journal of Chemistry, 2023 The pollination process in oil palm is assisted by the insect Elaeidobius kamerunicus, which occurs when male and female flowers bloom producing volatile compounds that act as attractants.
Fizrul Indra Lubis +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Combining supercritical CO2 (s‐CO2) cycles with particle‐based heat transfer media holds great potential in concentrated solar power plants but poses enormous material challenges. The particle/s‐CO2 heat exchanger must withstand extreme conditions, including high temperatures, pressures, CO2 corrosion, and erosion.
Mathias Christian Galetz +5 more
wiley +1 more source
Grasas y AceitesThis research was carried out to examine the monthly changes in both the volatile oil content and volatile components of cherry laurel leaves by taking samples every month for 12 months in Turkey.
S. Akçura
doaj +1 more source
Oil volatility, oil and gas firms and portfolio diversification [PDF]
Energy Economics, 2018 This paper investigates the volatility spillovers and co-movements among oil prices and stock prices of major oil and gas corporations over the period between 18th June 2001 and 1st February 2016. To do so, we use the spillover index approach by Diebold and Yilmaz (2009, 2012, 2014, 2015) and the dynamic correlation coefficient model of Engle (2002) so
Antonakakis, Nikolaos +4 more
openaire +3 more sources
Advanced Engineering Materials, EarlyView.This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley +1 more source