Academic Journal
Stable carbon isotope Composition of c9,t11-conjugated linoleic acid in cow's milk as related to dietary fatty acids
| العنوان: | Stable carbon isotope Composition of c9,t11-conjugated linoleic acid in cow's milk as related to dietary fatty acids |
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| المؤلفون: | Richter, E.K., Spangenberg, J.E., Klevenhusen, F., Soliva, C.R., Kreuzer, M., Leiber, F. |
| المصدر: | Lipids, vol. 47, pp. 161-169 |
| سنة النشر: | 2012 |
| المجموعة: | Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
| الوصف: | This study explores the potential use of stable carbon isotope ratios (delta C-13) of single fatty acids (FA) as tracers for the transformation of FA from diet to milk, with focus on the metabolic origin of c9,t11-18:2. For this purpose, dairy cows were fed diets based exclusively on C-3 and C-4 plants. The FA in milk and feed were fractionated by silver-ion thin-layer chromatography and analyzed for their delta C-13 values. Mean delta C-13 values of FA from C-3 milk were lower compared to those from C-4 milk (-30.1aEuro degrees vs. -24.9aEuro degrees, respectively). In both groups the most negative delta C-13 values of all FA analyzed were measured for c9,t11-18:2 (C-3 milk = -37.0 +/- A 2.7aEuro degrees; C-4 milk -31.4 +/- A 1.4aEuro degrees). Compared to the dietary precursors 18:2n-6 and 18:3n-3, no significant C-13-depletion was measured in t11-18:1. This suggests that the delta C-13-change in c9,t11-18:2 did not originate from the microbial biohydrogenation in the rumen, but most probably from endogenous desaturation of t11-18:1. It appears that the natural delta C-13 differences in some dietary FA are at least partly preserved in milk FA. Therefore, carbon isotope analyses of individual FA could be useful for studying metabolic transformation processes in ruminants. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_C3B7B0E8CD311; https://serval.unil.ch/notice/serval:BIB_C3B7B0E8CD31; https://serval.unil.ch/resource/serval:BIB_C3B7B0E8CD31.P001/REF.pdf |
| DOI: | 10.1007/s11745-011-3599-0 |
| الاتاحة: | https://serval.unil.ch/notice/serval:BIB_C3B7B0E8CD31 https://doi.org/10.1007/s11745-011-3599-0 https://serval.unil.ch/resource/serval:BIB_C3B7B0E8CD31.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_C3B7B0E8CD311 |
| Rights: | info:eu-repo/semantics/openAccess ; Copying allowed only for non-profit organizations ; https://serval.unil.ch/disclaimer |
| رقم الانضمام: | edsbas.F1735D36 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/s11745-011-3599-0 |
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