Occurrence of γ-Tocopherol and Variation of α- and γ-Tocopherol in Bovine Milk Fat

Kanno, Choemon; Yamauchi, Kunio; Tsugô, Tomokichi

doi:10.3168/jds.s0022-0302(68)87264-9

Cited by 14 publications

(7 citation statements)

References 11 publications

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“…Camelina oil contains α-and γ-tocopherols (28.1 and 742 ppm, respectively; Zubr and Matthäus, 2002), which may account for the stable peroxide concentrations during prolonged storage of butter despite a higher concentration of PUFA in milk fat from cows fed CO treatments. Milk α-and γ-tocopherol concentrations can be modified by diet (Kanno et al, 1968;Havemose et al, 2004), but the efficiency of transfer of α-tocopherol from the diet into milk gradually declines at high inclusion rates (Weiss and Wyatt, 2003).…”

Section: Milk Production and Sensory Qualitymentioning

confidence: 99%

Effect of incremental amounts of camelina oil on milk fatty acid composition in lactating cows fed diets based on a mixture of grass and red clover silage and concentrates containing camelina expeller

Halmemies-Beauchet-Filleau

Shingfield

Simpura

et al. 2017

Journal of Dairy Science

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Camelina is an ancient oilseed crop that produces an oil rich in cis-9,cis-12 18:2 (linoleic acid, LA) and cis-9,cis-12,cis-15 18:3 (α-linolenic acid, ALA); however, reports on the use of camelina oil (CO) for ruminants are limited. The present study investigated the effects of incremental CO supplementation on animal performance, milk fatty acid (FA) composition, and milk sensory quality. Eight Finnish Ayrshire cows (91 d in milk) were used in replicated 4 × 4 Latin squares with 21-d periods. Treatments comprised 4 concentrates (12 kg/d on an air-dry basis) based on cereals and camelina expeller containing 0 (control), 2, 4, or 6% CO on an air-dry basis. Cows were offered a mixture of grass and red clover silage (RCS; 1:1 on a dry matter basis) ad libitum. Incremental CO supplementation linearly decreased silage and total dry matter intake, and linearly increased LA, ALA, and total FA intake. Treatments had no effect on whole-tract apparent organic matter or fiber digestibility and did not have a major influence on rumen fermentation. Supplements of CO quadratically decreased daily milk and lactose yields and linearly decreased milk protein yield and milk taste panel score from 4.2 to 3.6 [on a scale of 1 (poor) to 5 (excellent)], without altering milk fat yield. Inclusion of CO linearly decreased the proportions of saturated FA synthesized de novo (4:0 to 16:0), without altering milk fat 18:0, cis-9 18:1, LA, and ALA concentrations. Milk fat 18:0 was low (<5 g/100 g of FA) across all treatments. Increases in CO linearly decreased the proportions of total saturates from 58 to 45 g/100 g of FA and linearly enriched trans-11 18:1, cis-9,trans-11 18:2, and trans-11,cis-15 18:2 from 5.2, 2.6, and 1.7 to 11, 4.3, and 5.8 g/100 g of FA, respectively. Furthermore, CO quadratically decreased milk fat trans-10 18:1 and linearly decreased trans-10,cis-12 18:2 concentration. Overall, milk FA composition on all treatments suggested that one or more components in camelina seeds may inhibit the complete reduction of 18-carbon unsaturates in the rumen. In conclusion, CO decreased the secretion of saturated FA in milk and increased those of the trans-11 biohydrogenation pathway or their desaturation products. Despite increasing the intake of 18-carbon unsaturated FA, CO had no effect on the secretions of 18:0, cis-9 18:1, LA, or ALA in milk. Concentrates containing camelina expeller and 2% CO could be used for the commercial production of low-saturated milk from grass-and RCS-based diets without major adverse effects on animal performance.

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Section: Milk Production and Sensory Qualitymentioning

confidence: 99%

Effect of incremental amounts of camelina oil on milk fatty acid composition in lactating cows fed diets based on a mixture of grass and red clover silage and concentrates containing camelina expeller

Halmemies-Beauchet-Filleau

Shingfield

Simpura

et al. 2017

Journal of Dairy Science

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“…The differences in vitamin E contents among months were found to be significant (p a 0.01). Kanno et al [15] and Coors and Montag [16] reported that butter produced in summer contains more tocopherol than that produced in winter. The reason for the difference between summer and winter butters was type of feeding.…”

Section: Changes In Vitamin E Contentmentioning

confidence: 99%

Effects of season on vitamins A and E contents and colour of Turkish butter

Göktürük

Sezgin

Yıldırım³

et al. 2002

Nahrung

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“…The hydroxy dimer of r-tocopherol is also reported to be present in soybean oil,17) tung oil,181 and cotton seed oil'S) and the hydroxy dimer of r-tocotrienol in Hevea latex. 20 ) Bovine milk fat contained at least 6 a-Tocotrienol is first synthesized and then methylated to (3-, r-, and a-tocotrienols, in that order. Tocotrienols are finally saturated to tocopherols.…”

Section: Discussionmentioning

confidence: 99%

“…They were analyzed by the most sensitive spectrophotometric method.7) The average ratio of a-: r-tocopherol was 95: 5 in milk fat isolated from normal pooled milk. 6 ) Thompson et al S ) have also reported that (-tocopherol ** was present, along with atocopherol, only in the milk of cow fed brewers' or distillers' grains during the winter • Present address: Tokyo Kasei University, Kaga 1-18-1, Itabash-ku, Tokyo.…”

Section: Four Tocopherols (A- 13- R- and O-t) And Four Tocotrienolmentioning

confidence: 99%

“…"-5) Our previous paper 6 ) reported that ,-tocopherol, in addition to a-tocopherol, is present as a natural component in bovine milk fat. They were analyzed by the most sensitive spectrophotometric method.7) The average ratio of a-: r-tocopherol was 95: 5 in milk fat isolated from normal pooled milk.…”

Section: Four Tocopherols (A- 13- R- and O-t) And Four Tocotrienolmentioning

confidence: 99%

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Further Investigation on Naturally Occurring Tocopherols and Tocotrienols in Bovine Milk Fat

Kanno

Yamauchi

Tsugô³

1972

Agricultural and Biological Chemistry

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Occurrence of γ-Tocopherol and Variation of α- and γ-Tocopherol in Bovine Milk Fat

Cited by 14 publications

References 11 publications

Effect of incremental amounts of camelina oil on milk fatty acid composition in lactating cows fed diets based on a mixture of grass and red clover silage and concentrates containing camelina expeller

Effect of incremental amounts of camelina oil on milk fatty acid composition in lactating cows fed diets based on a mixture of grass and red clover silage and concentrates containing camelina expeller

Effects of season on vitamins A and E contents and colour of Turkish butter

Further Investigation on Naturally Occurring Tocopherols and Tocotrienols in Bovine Milk Fat

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