scholarly journals Organogel formation via supramolecular assembly of oleic acid and sodium oleate

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47466-47475 ◽  
Author(s):  
Constantinos V. Nikiforidis ◽  
Elliot Paul Gilbert ◽  
Elke Scholten
Keyword(s):  
Oleic Acid ◽  
Sodium Oleate ◽  
Supramolecular Assembly ◽  
Hydrophobic Media

To create materials with novel functionalities, the formation of gels within hydrophobic media has become popular.

scholarly journals Unravelling the Thermal Decomposition Parameters for The Synthesis of Anisotropic Iron Oxide Nanoparticles

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 881 ◽  
Author(s):  
Geoffrey Cotin ◽  
Céline Kiefer ◽  
Francis Perton ◽  
Dris Ihiawakrim ◽  
Cristina Blanco-Andujar ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Sodium Oleate ◽  
Shape Control ◽  
Oxide Nanoparticles ◽  
Chelating Ligand ◽  
Precursor Structure ◽  
Negative Effect ◽  
Magnetic Resonance Imaging Mri

Iron oxide nanoparticles are widely used as a contrast agent in magnetic resonance imaging (MRI), and may be used as therapeutic agent for magnetic hyperthermia if they display in particular high magnetic anisotropy. Considering the effect of nanoparticles shape on anisotropy, a reproducible shape control of nanoparticles is a current synthesis challenge. By investigating reaction parameters, such as the iron precursor structure, its water content, but also the amount of the surfactant (sodium oleate) reported to control the shape, iron oxide nanoparticles with different shape and composition were obtained, in particular, iron oxide nanoplates. The effect of the surfactant coming from precursor was taking into account by using in house iron stearates bearing either two or three stearate chains and the negative effect of water on shape was confirmed by considering these precursors after their dehydration. Iron stearates with three chains in presence of a ratio sodium oleate/oleic acid 1:1 led mainly to nanocubes presenting a core-shell Fe1−xO@Fe3−xO4 composition. Nanocubes with straight faces were only obtained with dehydrated precursors. Meanwhile, iron stearates with two chains led preferentially to the formation of nanoplates with a ratio sodium oleate/oleic acid 4:1. The rarely reported flat shape of the plates was confirmed with 3D transmission electronic microscopy (TEM) tomography. The investigation of the synthesis mechanisms confirmed the major role of chelating ligand and of the heating rate to drive the cubic shape of nanoparticles and showed that the nanoplate formation would depend mainly on the nucleation step and possibly on the presence of a given ratio of oleic acid and chelating ligand (oleate and/or stearate).

Study on γ-Fe2O3 Magnetic Fluid by Thermal Oxidizing of Fe3O4 Nanoparticles

2015 ◽  
Vol 713-715 ◽  
pp. 2916-2919
Author(s):  
Hang Zheng ◽  
Hui Ping Shao ◽  
Zi Fen Zhao
Keyword(s):  
Surface Modification ◽  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Saturation Magnetization ◽  
Sodium Oleate ◽  
Magnetic Fluid ◽  
Silicone Oil ◽  
Precipitation Method ◽  
Carrier Liquid ◽  
Co Precipitation

In this paper, Fe3O4magnetic nanoparticles were synthesized by chemical co-precipitation method and their surface was modified by sodium oleate. The γ-Fe2O3magnetic nanoparticles were achieved by thermal oxidizing of Fe3O4. The γ-Fe2O3magnetic fluid was prepared by using silicone oil as carrier liquid and oleic acid as surface modification agent, and the saturation magnetization of prepared γ-Fe2O3magnetic fluid hits 14.25emu/g.

scholarly journals Satiety from fat? Adverse effects of intestinal infusion of sodium oleate

1997 ◽  
Vol 273 (5) ◽  
pp. R1779-R1785 ◽  
Author(s):  
Israel Ramirez ◽  
Michael G. Tordoff ◽  
Mark I. Friedman
Keyword(s):  
Oleic Acid ◽  
Fatty Acid ◽  
Food Intake ◽  
Eating Behavior ◽  
Sodium Oleate ◽  
Cell Damage ◽  
Ethyl Oleate ◽  
Intestinal Lumen ◽  
Ldh Activity ◽  
Intestinal Infusion

To determine whether damage to the intestinal mucosa by oleic acid causes the suppression of food intake observed in response to intraintestinal infusion of the fatty acid, we measured lactate dehydrogenase (LDH) activity, a marker for cell damage, in the intestinal lumen after intestinal infusion of fatty acid under conditions similar to those employed in studies of eating behavior. Infusions of 25 or 51 mM sodium oleate (neutralized oleic acid) markedly and rapidly increased LDH activity, whereas infusions of saline had little or no effect. Infusion of octanoate, which has been reported to be ineffective in reducing eating behavior, did not increase intestinal LDH activity relative to saline infusion. Similarly, infusion of ethyl oleate or free (nonneutralized) oleic acid neither increased luminal LDH activity nor suppressed food intake. Infusion of sodium oleate also produced a strong conditioned aversion to sucrose. The results strongly suggest that the suppression of food intake induced by intraintestinal infusion of sodium oleate is due to the injurious effects of this unphysiological form of the fatty acid.

Phase behavior in the biologically important oleic acid/sodium oleate/water system

2018 ◽  
Vol 211 ◽  
pp. 30-36 ◽  
Author(s):  
Stefania Mele ◽  
Olle Söderman ◽  
Helena Ljusberg-Wahrén ◽  
Krister Thuresson ◽  
Maura Monduzzi ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Phase Behavior ◽  
Sodium Oleate ◽  
Water System

scholarly journals EFFECT OF FATTY ACIDS ON THE RESISTANCE OF MICE TO TRANSPLANTED CANCER

1924 ◽  
Vol 40 (3) ◽  
pp. 363-373 ◽  
Author(s):  
Waro Nakahara
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Linolenic Acid ◽  
Sodium Oleate ◽  
Sodium Stearate ◽  
The Other ◽  
Sodium Palmitate ◽  
Other Hand ◽  
Linolic Acid

Sodium oleate, oleic acid, linolic acid, and linolenic acid injected into mice in suitable amounts induce a material increase in the resistance against subsequent transplantation of cancer grafts, although they fail to exert so marked an influence on cancer grafts already in place. Sodium palmitate and sodium stearate, on the other hand, do not produce immunity, at least in the amounts employed in the present study.

X-ray diffraction and spectroscopic studies of oleic acid–sodium oleate

2001 ◽  
Vol 109 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Poonam Tandon ◽  
Steve Raudenkolb ◽  
Reinhard H.H Neubert ◽  
Willi Rettig ◽  
Siegfried Wartewig
Keyword(s):  
Oleic Acid ◽  
Sodium Oleate ◽  
Spectroscopic Studies ◽  
X Ray Diffraction ◽  
X Ray
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