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Monitoring of engine oil aging by diffusion and low-field nuclear magnetic resonance relaxation
(Elsevier, 2019-04)
Time domain, also named lowfield nuclear magnetic resonance is used to monitor oil degradation by measuring relaxation and diffusion. As quality control of oils is indispensable to optimize oil change intervals while ...
NMR Relaxometry analysis of lubricant oils degradation
(IOP Publishing, 2005-09)
The present work was undertaken in order to investigate lubricant oil degradation at the molecular level. Ageing effects, as reflected on the proton spin-lattice relaxation rate (T −1 1 ) dispersion, were studied in two ...
Monitoring lubricant oil degradation using field-cycling NMR relaxometry
(Taylor & Francis Ltd, 2019-04-30)
Proton fast field-cycling nuclear magnetic resonance (1 HFFC-NMR) was used to study the effect of thermal stress in mineral base oil. The base oil underwent controlled thermal degradation and its relaxometric response was ...
Isolation and Molecular characterization of microorganisms with potential for the degradation of oil and grease from palm oil refinery wastes
(2016-04)
In this study we isolated and characterized native microorganisms with the ability to degrade oil and grease
(O&G) and evaluated their potential for the treatment of POMEs from a palm oil refining process. Yeast and
bacterial ...
Molecular characterization and evaluation of oil-degrading native bacteria isolated from automotive service station oil contaminated soils
(2016-04)
In this study, a hydrocarbon-degrading mixed inoculum which is able to use used oil as sole carbon source,
was selected from 15 bacterial isolates obtained from automotive service station oil-contaminated soils.
Degrading ...
Kinetics of tocopherol degradation during the storage of wheat germ oil
(John Wiley & Sons Inc, 2015-11)
Tocopherol degradation in wheat germ oil was studied during storage at different temperatures. Two types of wheat germ were used: heat-treated germ (HT) and raw germ (RG). The oil was extracted (Soxhlet, n-hexane) and ...
Degradation of the Oxirane Ring of Epoxidized Vegetable Oils in a Liquid-liquid-solid Heterogeneous Reaction System
(Elsevier Science Sa, 2007-12)
The main oxirane-ring opening reactions that occur during the manufacture of epoxidized vegetable oils using a strongly acidic, gel-type ionexchange resin (IER) (Amberlite IR-120, 8% crosslinking) were analyzed. By using ...
NMR relaxometry analysis of molecular degradation in internal combustion engine lubricants
(John Wiley & Sons Ltd, 2021-04)
A set of experimental techniques headed by proton fast field-cycling nuclear magnetic resonance (1HFFC-NMR) were used to analyze the effects of degradation of lubricant oil used in an internal combustion engine (ICE). Its ...
Polyurethane networks from pentaerythritol-modified castor oil and lysine polyisocyanates: synthesis, mechanical, and thermal properties and in vitro degradationPoliuretanos obtenidos a partir de aceite de higuerilla modificado y poli-isocianatos de lisina: síntesis, propiedades mecánicas y térmicas y degradación in vitro
(Química Nova, 2014-08-11)
Biodegradable polyurethanes (PUR) were prepared from polyols derived from castor oil by transesterification of pentaerythritol-modified castor oil and lysine polyisocyanates (LDI and LTI). The polyurethanes obtained were ...
Molecular detection and characterization of novel lipase genes of the lipolytic yeast Candida palmioleophila
(2018-05-01)
In this study we analyzed the genetic variability of lipase gene sequences from eight oil and grease-degrading
strains of Candida palmioleophila and to relate it to their degrading ability. The genetic variability of ...