Occurrence of <i>trans</i>-unsaturated acids in the faecal lipids of ruminants and non-ruminants

Hartman, L.; Shorland, F. B.; Cleverley, B.

doi:10.1042/bj0690001

Cited by 21 publications

(1 citation statement)

References 10 publications

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“…As much as 20 % of the fatty acid fraction of ruminant faecal lipids are trans-unsaturated acids, the origin of which is attributed to the hydrogenating action of intestinal bacteria (Hartman, Shorland & Cleverley, 1958). The large proportions of bound calcium in the lower small intestine, caecum and colon may thus have been due to the formation of calcium soaps.…”

Section: -2mentioning

confidence: 99%

Studies on calcium and magnesium in the alimentary tract of sheep I. The distribution of calcium and magnesium in the contents taken from various parts of the alimentary tract

Storry¹

1961

J. Agric. Sci.

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1. The distribution of calcium and magnesium in the contents of the reticulo-rumen sac, omasum, abomasum, small intestine, caecum and colon of the sheep was studied by means of ultrafiltration through collodion membranes.2. In all organs except the abomasum considerable proportions of calcium and magnesium existed in a non-ultrafilterable form. In the abomasum where the pH is normally between 2 and 3 there was virtually no bound calcium or magnesium. The proportion of ultrafilterable calcium in the small intestine appeared to be dependent on the pH of the digesta, low pH values favouring higher proportions of ultrafilterable calcium. With magnesium this correlation was less obvious and appeared to be upset by unknown factors in the animals consuming a fresh grass diet.3. From calculations it is postulated that the concentrations of ultrafilterable calcium and magnesium in rumen fluid are insufficient for these elements to be absorbed as freely diffusing ions, whereas in the abomasum and duodenum the concentrations of ultrafilterable calcium and magnesium are in favour of a net uptake from the gut.

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Section: -2mentioning

confidence: 99%

Studies on calcium and magnesium in the alimentary tract of sheep I. The distribution of calcium and magnesium in the contents taken from various parts of the alimentary tract

Storry¹

1961

J. Agric. Sci.

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The occurrence of C13 to C31 branched‐chain fatty acids in the faeces of sheep fed rye grass, and of C12 to C34 normal acids in both the faeces and the rye grass

Body¹,

Hansen²

1978

J Sci Food Agric

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Rye grass was fed to sheep and the fatty acid composition of the rye grass lipids and of the faecal lipids was determined. The outstanding features were (a) the occurrence of 10.7 % of branched-chain is0 and anteiso acids ranging from C13 to C31 (inclusive) in the fatty acids of the faeces but of only 0.1 % of these constituents (17:O unteiso) in the acids of the rye grass; (b) the presence in the faecal fatty acids of 23.9% of components above C18, of which 22.2 % were n-saturated and 0.5 %were branched, but of only 7.2 % of these higher molecular weight acids in the rye grass. n-Fatty acids from C12 to C34 (predominantly C14C18) occurred in both the diet and the faeces. Whereas the rye grass fatty acids were mainly unsaturated (74.6%) and included 56.5 % of linolenic acid, the faecal acids contained a preponderance of saturated components (80.2 %) and only 1.2 % of linolenic acid. The fatty acids above C18 from the dietary and faecal lipids were identified as follows: (a) C19 to C34 n-saturated acids (predominantly even-numbered) in both the rye grass and the faeces; (b) C19 to C27 n-unsaturated acids in the rye grass; (c) C19 to C34 (except C33) n-unsaturated acids in the faeces; (d) C19 to C31 is0 and unteiso constituents in the faecal fatty acids, but absent from the rye grass acids. The presence of both is0 and unteiso odd-numbered acids (C13 to C31) and of is0 even-numbered acids (C14 to C30) in the faeces, suggested that these branched constituents were of microbial origin in the digestive tract of the sheep.

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Anwendung der IR‐Spektrographie auf dem Fettgebiet V: Untersuchung von Milchfetten auf trans‐ungesättigte Fettsäuren

Kaufmann

Volbert

Mankel

1961

Fette, Seifen, Anstrichm.

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Anwendung der IR-Spektrographie auf dem Fettgebiet V : Untersuchung von Milchfetten auf trans-ungesattigte Fettsauren::' I'on Prof. Dr. Dr. h. c. H . P . K a u f m a n n , Dr. F . V o l b e r t wid D r . G. M a u k e l A m tlcrn Deufsclzen Institut f u r Fettforschzmg, Miinster (Wcsif.)Mit Hilfe der IR-Spektrographie wird der trans-Gehalt von Frauenmilchfetl untersucht und mit dem van tierischen Milchf v t t m vcl-glichcn **.Emploi de la spectrographie IR dans le domaine des lipides V: Etude des graisses de lait sous le rapport des acides gras insatures-trans A l'aide de la spectrographie-IR, on etudie la composition de I d graisse de lait de femme et on la compare avec celle des qraisses de lait anirnales.

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Occurrence of trans-unsaturated acids in the faecal lipids of ruminants and non-ruminants

Abstract: After the identification of 5-10 % of trans-unsatur-Na2HPO4 (I 0-05) and 0-0217M-KH2PO4 +00095M-Na2HPO4 (I0.05). Potassium chloride was added to these buffers to bring the total ionic strength up to 0.1, 0-2, 0-3 and 0-5.

Cited by 21 publications

References 10 publications

Studies on calcium and magnesium in the alimentary tract of sheep I. The distribution of calcium and magnesium in the contents taken from various parts of the alimentary tract

Studies on calcium and magnesium in the alimentary tract of sheep I. The distribution of calcium and magnesium in the contents taken from various parts of the alimentary tract

The occurrence of C13 to C31 branched‐chain fatty acids in the faeces of sheep fed rye grass, and of C12 to C34 normal acids in both the faeces and the rye grass

Anwendung der IR‐Spektrographie auf dem Fettgebiet V: Untersuchung von Milchfetten auf trans‐ungesättigte Fettsäuren

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