Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 534738
Title Triacylglycerol Profile of Summer and Winter Bovine Milk Fat and the Feasibility of Triacylglycerol Fragmentation
Author(s) Tzompa-Sosa, Daylan A.; Meurs, Pim P.; Valenberg, Hein J.F. van
Source European Journal of Lipid Science and Technology 120 (2018)3. - ISSN 1438-7697
DOI http://dx.doi.org/10.1002/ejlt.201700291
Department(s) Food Quality and Design
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) bovine milk - lipidomics - MALDI-TOF - PSD fragmentation - seasonal variation
Abstract Bovine milk fat (MF) is considered to be one of the most complex fats, as it can consist of 400 FA which are non-randomly esterified into the TAG molecule. This study aims to determine specific differences on MF TAG profile between summer and winter cow's milk, and to study the feasibility of TAG fragmentation on non-chemically hydrogenated MF using MALDI-TOF/TOF MS with post source decay. The most notable discrimination between summer and winter MF is seen in polyunsaturated TAG, which are more abundant in summer. The feasibility of MF TAG fragmentation in non-chemically hydrogenated TAG is assessed using bulk MF and TAG previously separated according to degree of unsaturation. This last approach shows to be the most suitable. We show that sample concentration and abundance ratio with neighboring TAG affects TAG fragmentation. Non-chemically hydrogenated MF TAG has not been previously fragmented. Furthermore, this is the first time that the conditions affecting TAG fragmentation in MF are reported. Practical Application: TAG constitute the fundamental unit of fat crystals. Hence, fat crystal network is affected by variations in TAG profile. Understanding the variability of MF TAG profile between seasons may help to explain differences on crystallization behavior seen through the year in industrial processes. Moreover, TAG fragmentation allows determination of FA composition of individual TAG. This information is needed when studying the mechanism of FA acylation into TAG. For instance, when studying the effect of genetic variation of diacylglycerol acyl transferase isomer one in cows. The reported technique increases the capacity of MALDI-TOF MS in lipidomic analysis. This study aims to determine specific differences in milk-fat triacylglycerol (TAG) profiles between summer and winter cow's milk, and to study the feasibility of TAG fragmentation on non-chemically hydrogenated milk fat using MALDI-TOF/TOF MS with post source decay.
Comments
There are no comments yet. You can post the first one!
Post a comment
 
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.