Results 21 to 30 of about 3,337,720 (319)

Sr AND Nd ISOTOPIC SYSTEMATICS OF MID-CRETACEOUS ORGANIC-RICH ROCKS (OIL SHALES) FROM THE QIANGTANG BASIN: IMPLICATIONS FOR SOURCE REGIONS AND SEDIMENTARY PALEOENVIRONMENT; pp. 109–123 [PDF]

open access: yesOil Shale, 2015
The Mid-Cretaceous oil shale from the Qiangtang Basin represents the potentially largest marine oil shale resource in China. 23 samples, includ­ing oil shale and marl, were collected from the Basin’s Shengli River area to determine Sr and Nd isotope ...
XIUGEN FU   +6 more
doaj   +1 more source

The Rod String Loads Variation during Short-Term Annular Gas Extraction

open access: yesEnergies, 2022
This paper highlights field studies to determine the nature of variations in the load on the sucker-rod string during short-term gas extraction from the wellbore annulus.
Alexander Vladimirovich Artyukhov   +4 more
doaj   +1 more source

Evaluation of the possibility of separating commercial phenol from the phenolic fraction of coal tar [PDF]

open access: yesE3S Web of Conferences, 2021
This article is about the possibility of concentrating commercial coal phenol with a concentration of 99% by the weight method of rectification from the phenolic fraction of coal tar. The sufficiency of phenol is ensured by the kumol method, however, the
Schastnyy Y.O.   +2 more
doaj   +1 more source

Simulation of Oil Reservoirs Driving Indices and Recovery Mechanisms

open access: yesJournal of Chemical and Petroleum Engineering, 2015
Different recovery mechanisms are activated during the production from reservoirs. Wells sometimes are kept with the injection. Therefore the evaluation of injection indices depended on material injection, seems to be necessary.
Azizollah Khormali   +2 more
doaj   +1 more source

Comparison of mineral oil and non-mineral oil placebo on coronary plaque progression by coronary computed tomography angiography. [PDF]

open access: yesCardiovasc Res, 2020
Lakshmanan S   +11 more
europepmc   +2 more sources

A Comparative Study of Physicochemical, Dielectric and Thermal Properties of Pressboard Insulation Impregnated with Natural Ester and Mineral Oil [PDF]

open access: yes, 2011
Natural ester is considered to be a substitute of mineral oil in the future. To apply natural ester in large transformers safely, natural ester impregnated solid insulation should be proved to have comparable dielectric strength and thermal stability to ...
Chen, George   +4 more
core   +1 more source

Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions [PDF]

open access: yes, 2017
Although many studies investigating the tribological performance of pure vegetable oils have been conducted, a better understanding of vegetable oil tribological performance at extreme conditions is still needed. Similarly, little work has been carried
Bahari, A., Lewis, R., Slatter, T.
core   +3 more sources

A new approach to understanding the frequency response of mineral oil [PDF]

open access: yes, 2014
Dielectric spectroscopy is non-invasive diagnostic method and can give information about dipole relaxation, electrical conduction and structure of molecules.
Chen, George   +4 more
core   +1 more source

Wear resistance evaluation of palm fatty acid distillate using four-ball tribotester [PDF]

open access: yes, 2012
Petroleum reserves are declining nowadays while ironically petroleum is a major source of pollution despite many uses. Researchers are in effort to find an alternative to replace petroleum as a lubricant.
Ani, Farid Nasir   +2 more
core   +1 more source

Methyl Ester-Mineral Oil Mixture under Thermal Aging

open access: yesJurnal Nasional Teknik Elektro, 2023
Replacement with natural esters (retrofilling) is an alternative solution to extend the life expectancy of an oil-filled transformer containing mineral oil. During the retro-filling process, some portions of the mineral oil remain inside the transformer'
Abdul Rajab   +3 more
doaj   +1 more source

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