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Showing 1 to 20 of 77 for “"Stearic acid"”.
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Urea adducts of the esters of stearic acid
… Linear esters derived from normal saturated acids give adducts as expected. Urea complexation was found to be of great importance in the purification and separation of unsaturated esters of high molecular weight.</p><p>The object of the present research was to investigate the compositions of …
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The effect of condenser temperature and location on the molecular distillation characteristics of stearic acid
… on the molecular distillation characteristics of stearic acid, and from this study, determine this relationship of condenser temperature and location to be used in centrifugal molecular still operation. This investigation was accomplished using a magnetically driven centrifugal molecular still …
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Rheology and microscopy of low calorie mayonnaise-type emulsions made with stearic acid- modified maize and teff starches
… and maize starches modified with stearic acid (a naturally occurring fatty acid), has resulted in a paste with reduced gelling ability and higher viscosity in previous research. This suggests that these modified starches may have potential to be used as fat replacers. This project …
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Effect of Long Chain Fatty Acids on Anaerobic Digestion of Municiapal Sewage Sludge in Completely Mixed Reactors
… However, excessive addition of long chain fatty acid, the major content of FOG, has been reported to have inhibitory effects on the anaerobic digestion process and to cause operational challenges. In this study, high purity long chain fatty acids (LCFAs) including linoleic acid, oleic acid, and a …
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Investigating Complex Organic Species on Mineral Surfaces
… a model system investigated. Adsorption of stearic acid on the calcite surface in toluene was investigated via depletion isotherms, neutron reflectometry, sum-frequency generation and X-ray reflectometry. Stearic acid is shown to adsorb from toluene and can be removed and reapplied. However, …
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Organometallic Synthesis Kinetics of CdSe Quantum Dots
… in order to characterize synthesis kinetics in stearic acid, dodecylamine, and in trioctylphosphine oxide. The nucleation rate increased with Se concentration, while the growth rate followed the Cd concentration. Emission peak widths, emission redshift rates, nanocrystal growth rates, and …
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Effect of Long-Chain Fatty Acids on Anaerobic Digestion
… carried out to study whether long-chain fatty acids (LCFAs) have an effect on digestion of waste sludge under anaerobic conditions. Four different kinds of LCFAs were used in this study. The 18 carbon series with 0, 1, 2 and 3 double bonds were studied to evaluate the degree of saturation on …
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Effects of Aqueous Organic Coatings on the Interfacial Transport of Atmospheric Species
… either uncoated or containing octanol, octanoic acid and stearic acid monolayers. Both octanol and stearic acid reduced the rate of gaseous NO2 evolution, and octanol also decreased the steady-state amount of gaseous NO2. Alternatively, octanoic acid enhanced the rate of gaseous NO2 evolution. …
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Plasma total and lipoprotein cholesterol in men fed dietary fat from beef, dairy products and olive oil
… (TC). However, it has been suggested that stearic acid (18:0) does not increase plasma TC and should not be grouped with other saturated fatty acids: lauric (12:0), myristic (14:0) and palmitic (16:0), (LMP). Red meat contains a high amount of stearic acid, while dairy products are high in …
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Mild wear in dry and lubricated sliding systems
… Esso Technical White Oil alone and with a 0.1% stearic acid additive, for load and speed ranges that produced substantial amounts of asperity contact and thus a boundary lubricated regime of wear. The test material in all cases was AISI 52100 steel, for unlubricated sliding subjected to loads …
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Phase Inversion Dynamics of Polylactic Glycolic Acid Solutions Related to Biopharmaceutical Drug Delivery
… when the protein particle was densified with stearic acid and placed in a slow phase-inverting depot formulation. Particle densification can potentially be used with any protein or highly soluble drug agent, unlike other techniques that are protein specific. Taking advantage of the effects of …
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Manufacture and synthesis of a dark micro magnetic flake powder for forensic application
… investigated. It was shown that the amount of stearic acid content, ball packing fraction and weight loading were important parameters in determining the final flake qualities. The quality of latent fingerprint development with the dark flake powder was investigated. Some of the flake powders …
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Preparation of Zein-Based Biodegradable Materials and Investigation of Their Physical Properties
… was improved by dissolving zein and fatty acids in warm aqueous alcohol solutions. Resins were obtained through precipitation and kneading treatments. Inclusion of palmitic and stearic acid in the formulation resulted in harder resins that were suited for rolling into sheets; whereas …
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Development of photo-patterned composite structures in microchannels for oil reservoir research
… of tricyclodecane dimethanol diacrylate and stearic-acid treated calcium carbonate particles. This lithographic method is simple, fast, economical, and versatile compared with previous fabrication methods used for two-phase porous media micromodel experiments. With the micromodels developed …
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The effect of layered double hydroxides on the vulcanisation and properties of elastomer compounds
… different concentrations in the place of ZnO and stearic acid. The trimetal LDHs were synthesised by making a 10 mol % substitution of Ca with either Zn or Fe. The LDH synthesis was successful. XRD showed the characteristic LDH peaks and FTIR supported these results. In the case of the stearate …
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Hot-melt extrusion: A versatile pharmaceutical technology
… h with 90% of drug release in formulations using stearic acid in combination with ethyl cellulose, whereas 100% drug release in 8 h for stearic acid-hydroxypropylcellulose matrices. The third objective of this research work was apply a QbD approach based on design of experiments as a risk-based …
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The preparation of solid core drug delivery system (SCDDS) via supercritical processing of fatty acids
… and were coated with different ratios of fatty acid. A proportional increase in particle size was observed with increasing ratio of fatty acid in the formulation. Coating of silica particles with smaller chain fatty acids (lauric and myristic acid) resulted in a higher increase in particle size …
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Synthesis and Characterization of Aluminum-Carbon Nanotube Composite by Cryogenic Milling
… milling of the blended component powders. Stearic acid was used as a process control agent to minimize agglomeration of the powders upon milling. CNT reinforcement of the Al powder was successfully obtained while maintain CNT structure after milling the powders for periods ranging between …
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Self-assembly of linear-dendritic diblock copolymers
… end groups were functionalized with deuterated stearic acid to make the dendritic block hydrophobic, resulting in a macroamphiphile. Results indicate that stable monolayers are formed with PEO resting on the subphase and stearate groups extending into the air. Surface concentration and dendrimer …
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The effect of free fatty acids on endothelial cells
… molecules e.g. oxidized polyunsaturated fatty acids (PUFAs), or saturated free fatty acids (FFA) are alone sufficient to decrease endothelial cells. This hypothesis was tested by incubating porcine aortic endothelial cells (PAECs) with various oxidized PUFAs and saturated FFAs. Twenty hour …
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