Results 21 to 30 of about 35,683 (287)

Impedance Spectroscopy as a Tool for the Diagnosis of the State of Vegetable Oils Used as Lubricants

open access: yesInternational Journal of Electrochemical Science, 2015
In this research the performance of sesame seeds and sweet almond oils was analyzed used as lubricants in preventive wear testing (AW) in a four-ball tribometer. The impedance spectroscopy technique was used in the frequency range of 0.2 to 2000 kHz as a
E. Delgado, W. Aperador, A. Hernández
doaj   +1 more source

A case of lipoid pneumonia associated with occupational exposure to solvents in a dry‐cleaning worker

open access: yesRespirology Case Reports, 2021
Lipoid pneumonia can develop from exposure to different types of oil, but occupational exposure is rare. A 58‐year‐old woman was referred to our hospital for patchy airspace opacities in the lungs with lower lobe predominance on chest computed tomography.
Sunji Park, Ji Eun Park, Jaehee Lee
doaj   +1 more source

Effects of biological control on biodiversity of insects in citrus orchards of Babolsar, Mazandaran Province, Iran [PDF]

open access: yesArthropods, 2021
In this research, insect populations in citrus orchards of Hadishahr, Babolsar, Mazandaran Province, Iran, under different pest managements for two seasons (summer and autumn) from late June to late December 2017 were evaluated by installation of sticky ...
Sahar Sorkhabi Abdolmaleki   +3 more
doaj  

Low-Temperature Rheology and Thermoanalytical Investigation of Lubricating Oils: Comparison of Phase Transition, Viscosity, and Pour Point

open access: yesLubricants, 2021
According to the ASTM D97, the pour point is the temperature below which petroleum products cease to flow. To evaluate the relevance of pour point measurements for synthetic lubricating oils, we investigated the crystallization, melting temperature and ...
Andreas Conrad   +4 more
doaj   +1 more source

Nanofluids in the Service of High Voltage Transformers: Breakdown Properties of Transformer Oils with Nanoparticles, a Review

open access: yesEnergies, 2018
The continuous development of electrical systems and high voltage transformers builds the need for looking for new insulating media or to improve the insulating properties of commercially available transformer oils (TO) by various modification techniques.
Jacek Fal, Omid Mahian, Gaweł Żyła
doaj   +1 more source

Investigation of the content of unsaturated hydrocarbons in transformer oils using IR spectroscopy

open access: yesИзвестия высших учебных заведений: Проблемы энергетики
THE  PURPOSE. To  analyze  the  current  understanding  of  unsaturated  hydrocarbons with  double  C=C  bonds  in  mineral  transformer  oils  and  evaluate  the  effectiveness  of  modern methods of controlling the content of these compounds in oils ...
M. Sh. Garifullin   +4 more
doaj   +1 more source

Evaluation of the lubricating power of sweet almond oil without additives

open access: yesDyna, 2018
The lubricity of sweet almond oil (Prunus amygdalus var. Dulcis) was evaluated through Anti Wear (AW) properties and Extreme Pressure (EP) performance in a four-ball tribometer.
Arnoldo Emilio Delgado-Tobón   +2 more
doaj   +1 more source

Mineral Paraffins in olives and olives oils

open access: yes, 2010
Mineral paraffins are used as markers of contamination with mineral oils. Toxic effects are observed in Fisher 344 rats at concentrations of 0.01–20 mg kg1 bw, depending on the type of paraffins administered. Concerns arise about possible presence
Tiziana Populin   +5 more
core   +1 more source

Swelling of Synthetic Rubbers in Mineral Oils. Swelling in Mineral Oils Containing Polyolefins and in Mixtures of Nujol and Biphenyl

open access: yes, 1942
The true cloud temperature of a 50–50 weight mixture of aniline and mineral oil is a reliable index of the amount of swelling a synthetic rubber undergoes when immersed in mineral oil.
P. O. Powers, H. A. Robinson
core   +1 more source

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