title: Effects of emulsifier addition on the crystallization and melting behavior of palm olein and coconut oil.
abstract: Two commercial emulsifiers (EM1 and EM2), containing predominantly monoacylglycerols (MAGs), were added in proportiond of 1.0 and 3.0% (w/w) to coconut oil and palm olein. EM1 consisted of approximately 90% MAGs, whereas EM2 consisted of approximately 50% MAGs. The crystallization behavior of these systems was evaluated by differential scanning calorimetry (DSC) and microscopy under polarized light. On the basis of DSC results, it was clear that the addition of EM2 accelerated the crystallization of coconut oil and delayed the crystallization of palm olein. In both oils EM2 addition led to the formation of smaller spherulites, and these effects improved the possibilities for using these fats as ingredients. In coconut oil the spherulites were maintained even at higher temperatures (20 °C). The addition of EM1 to coconut oil changed the crystallization pattern. In palm olein, the addition of 3.0% (w/w) of this emulsifier altered the pattern of crystallization of this fat.
authors.affiliation: Department of Biochemical and Pharmaceutical Technology and ‡Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo , Av. Prof. Lineu Prestes 580, B16, CEP 05508-900, São Paulo, SP, Brazil.
authors.forename: Jessica Mayumi
authors.initials: JM
authors.lastname: Maruyama
authors.forename: Fabiana Andreia Schafer De Martini
authors.initials: FA
authors.lastname: Soares
authors.forename: Natalia Roque
authors.initials: NR
authors.lastname: D'Agostinho
authors.forename: Maria Inês Almeida
authors.initials: MI
authors.lastname: Gonçalves
authors.forename: Luiz Antonio
authors.initials: LA
authors.lastname: Gioielli
authors.forename: Roberta Claro
authors.initials: RC
authors.lastname: da Silva
mesh_terms: D002152:Calorimetry, Differential Scanning; D000074263:Coconut Oil; D003460:Crystallization; D045703:Emulsifying Agents / Q000737:chemistry*; D005227:Fatty Acids / Q000032:analysis; D008859:Microscopy, Polarization; D050178:Monoglycerides / Q000737:chemistry; D000073878:Palm Oil; D010938:Plant Oils / Q000737:chemistry*; D013696:Temperature; D014280:Triglycerides / Q000032:analysis
chemical_list: D045703:Emulsifying Agents; D005227:Fatty Acids; D050178:Monoglycerides; D010938:Plant Oils; D014280:Triglycerides; D000073878:Palm Oil; D000074263:Coconut Oil