caa a22 4500 465796400 CHVBK 20180323112039.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF02539621 doi (NATIONALLICENCE)springer-10.1007/BF02539621 Hydrogenation of palm stearine: Changes in chemical composition and thermal properties [Elektronische Daten] [W. Busfield, Peter Proschogo] The progress of hydrogenation of palm stearine using atrans promoting catalyst has been followed by monitoring the chemical composition and the thermal properties by NMR and DSC techniques. The results show that hydrogenation occurs in 2 stages. In the first stage, the formation of the triglyceride, PEP from the lower melting PLP, allows an enhanced mixed crystal formation with the high melting PPP. Although this promotes a greater rate of crystallization in the α form and transformation to the β′ form in tempering, further transformation to the β form is inhibited. Tm is thereby reduced in the early stages even though both the rate of crystallization and the solid fat content at temperatures <40°C are increased. In the later stages of hydrogenation, the conversion of the triglyceride POO to the higher melting POS increases the proportion of the sample which can crystallize in the high melting fraction to at least 80%. Although this still cannot be transformed into the β crystal form, Tm for the overall sample and the solids content at all temperatures are now greater than those of the original palm stearine sample. American Oil Chemists' Society, 1990 Busfield W. Division of Science and Technology, Griffith University, Nathan, 4111, Brisbane, Queensland, Australia aut Proschogo Peter Meadow Lea Foods, Murarrie, Brisbane aut Journal of the American Oil Chemists' Society Springer-Verlag 67/3(1990-03-01), 176-181 0003-021X 67:3<176 1990 67 11746 https://doi.org/10.1007/BF02539621 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02539621 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Busfield W. Division of Science and Technology, Griffith University, Nathan, 4111, Brisbane, Queensland, Australia aut NATIONALLICENCE 700 1- Proschogo Peter Meadow Lea Foods, Murarrie, Brisbane aut NATIONALLICENCE 773 0- Journal of the American Oil Chemists' Society Springer-Verlag 67/3(1990-03-01), 176-181 0003-021X 67:3<176 1990 67 11746 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer