Free fatty acids and their esters modulate isothermal crystallization of anhydrous milk fat
| Autor: | Fernando Leal-Calderon, Maud Cansell, Mathilde Bayard |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Magnetic Resonance Spectroscopy Palmitic Acid Oleic Acids Fatty Acids Nonesterified Analytical Chemistry law.invention Palmitic acid 03 medical and health sciences chemistry.chemical_compound 0404 agricultural biotechnology law Eicosanoic Acids Animals Crystallization Caproates Triacetin Triglycerides Polarized light microscopy Degree of unsaturation 030109 nutrition & dietetics Chromatography Esterification 04 agricultural and veterinary sciences General Medicine 040401 food science Dietary Fats Milk chemistry Tripalmitin Anhydrous Stearic Acids Food Science |
| Zdroj: | Food chemistry. 218 |
| ISSN: | 1873-7072 |
| Popis: | The effect of free fatty acids with different chain lengths or unsaturation degree on anhydrous milk fat (AMF) crystallization was evaluated. The impact of esterification was also studied using three triglycerides. Melted blends containing the additives at concentrations lower than 12wt.% were quenched at 25°C and isothermal crystallization was monitored by pulsed low-resolution nuclear magnetic resonance. In parallel, polarized light microscopy was used to observe the microstructure. Compounds based on long chain saturated fatty acids, i.e. palmitic, stearic, eicosanoic acids, tripalmitin and tristearin accelerated crystallization. Conversely, propanoic, hexanoic and oleic acids slowed down the process, while triacetin had no impact. Interestingly, above a critical concentration, the addition of palmitic, stearic or eicosanoic acids caused a transition from a one-step to two-step process. Gompertz model was used to fit the experimental data and to assess the influence of the molecular properties of the additives on the kinetic parameters. |
| Databáze: | OpenAIRE |
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