Results 61 to 70 of about 733,980 (168)

Enantioselective GC–MS analysis of volatile components from rosemary (Rosmarinus officinalis L.) essential oils and hydrosols

open access: yesBioscience, biotechnology and biochemistry, 2016
Essential oils and hydrosols were extracted from rosemary harvested in different seasons, and the chemical compositions of volatile components in the two fractions were analyzed by gas chromatography–mass spectrometry (GC–MS).
K. Tomi   +5 more
semanticscholar   +1 more source

Econometric Model Using Arbitrage Pricing Theory and Quantile Regression to Estimate the Risk Factors Driving Crude Oil Returns [PDF]

open access: yesarXiv, 2023
This work adopts a novel approach to determine the risk and return of crude oil stocks by employing Arbitrage Pricing Theory (APT) and Quantile Regression (QR).The APT identifies the underlying risk factors likely to impact crude oil returns.Subsequently, QR estimates the relationship between the factors and the returns across different quantiles of ...
arxiv  

Regional Oil Extraction and Consumption: A simple production model for the next 35 years Part I [PDF]

open access: yesarXiv, 2016
The growing conflicts in and about oil exporting regions and speculations about volatile oil prices during the last decade have renewed the public interest in predictions for the near future oil production and consumption. Unfortunately, studies from only 10 years ago, which tried to forecast the oil production during the next 20-30 years, failed to ...
arxiv  

Researches on the capitalization of some medicinal plants to obtain essential oils by using the performant innovative installation EUV 2x1000 type [PDF]

open access: yesE3S Web of Conferences, 2019
The article includes research on the production of essential oils from medicinal plants by applying water vapour distillation, the method most commonly used for the extraction of essential oils from plants. The results consist of extracting the essential
Grigore Ion   +10 more
doaj   +1 more source

Chemical composition, antibacterial and antifungal activities of Ruta graveolens L. volatile oils

open access: yes, 2016
The Ruta graveolens L. (Rutaceae) plant is used medicinally as a homeopathic remedy in various areas of the world. In this study, volatile oils were extracted from the areal parts of the plant which was collected from southern India, then investigated ...
D. N. Reddy, A. J. Al-Rajab
semanticscholar   +1 more source

Microencapsulation of Thymus vulgaris and Tagetes minuta essential oils: volatile release behavior, antibacterial activity and effect on potato yield

open access: yesJournal of the Saudi Society of Agricultural Sciences, 2022
María Cecilia Prieto   +8 more
semanticscholar   +1 more source

Volatile Oxidation Compounds and Stability of Safflower, Sesame and Canola Cold-Pressed Oils as Affected by Thermal and Microwave Treatments.

open access: yesJournal of Oleo Science, 2016
The goal of this study was to investigate the effect of heating and microwave treatment on the levels of volatile oxidation products and the stability of safflower (Carthamus tinctorius L.), sesame (Sesamum indicum) and canola (Brassica napus L.) cold ...
M. Kıralan, M. Ramadan
semanticscholar   +1 more source

The Impact of Oil and Gold Prices Shock on Tehran Stock Exchange: A Copula Approach [PDF]

open access: yesIranian Journal of Economic Studies Vol. 1, No. 2, Fall 2012, 23-47, 2020
There are several researches that deal with the behavior of SEs and their relationships with different economical factors. These range from papers dealing with this subject through econometrical procedures to statistical methods known as copula. This article considers the impact of oil and gold price on Tehran Stock Exchange market (TSE).
arxiv  

Sanction or Financial Crisis? An Artificial Neural Network-Based Approach to model the impact of oil price volatility on Stock and industry indices [PDF]

open access: yesarXiv, 2019
In this paper, we model the impact of oil price volatility on Tehranstock and industry indices in two periods of international sanctions and post-sanction. To analyse the purpose of study, we use Feed-forward neural net-works. The period of study is from 2008 to 2018 that is split in two periods during international energy sanction and post-sanction ...
arxiv  

Evaporation-triggered microdroplet nucleation and the four life phases of an evaporating Ouzo drop [PDF]

open access: yes, 2017
Evaporating liquid droplets are omnipresent in nature and technology, such as in inkjet printing, coating, deposition of materials, medical diagnostics, agriculture, food industry, cosmetics, or spills of liquids. While the evaporation of pure liquids, liquids with dispersed particles, or even liquid mixtures has intensively been studied over the last ...
arxiv   +1 more source

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