Effects of increased dietary sulfur on beef steer mineral status, performance, and meat fatty acid composition

Context Cold-pressed rapeseed cake is a by-product of biodiesel manufacturing that can be obtained on-farm after simple mechanical extraction of the oil. It has a high crude fat content and contains significant amounts of linoleic acid, which make it a promising lipid supplement to modulate meat fatty acid profile. However, previous studies have indicated that using unsaturated fats in beef cattle diets could promote lipid oxidation and reduce meat redness. Aims The present study aimed to evaluate the effects of supplementation of intensively fattened beef steers with cold-pressed rapeseed cake on the fatty acid composition of beef fat and changes in measures of meat colour and lipid oxidation during 6 days of aerobic storage. Methods Sixteen Limousin steers were divided into two homogeneous groups and were fed ad libitum with barley straw and a concentrate mixture supplemented with either PROGRAS (PROGRAS at 2.7% of the diet, high in palmitic acid C16:0 from palm oil; CTR, experimental control; n = 8) or cold-pressed rapeseed cake (CPRC at 14.8% of the diet; CPRC treatment; n = 8) for a period of 9 months. The growth performance and carcass traits were assessed. The intramuscular fatty acids were analysed and the colour stability and lipid oxidation were measured in meat stored aerobically at 4°C for 0, 3 or 6 days. Key results Slaughter bodyweight and average daily gain were not affected by the inclusion of CPRC in the diet. Nor were there any changes in carcass weight, conformation or fatness. The longissimus thoracis from CPRC-fed animals depicted a higher UFA–SFA ratio and a lower atherogenic index than did that from animals fed CTR. Feeding CPRC increased the oleic acid , the vaccenic acid and the rumenic acid proportions in the muscle fat without affecting the ratio of C18:1 trans-10 to C18:1 trans-11. The extents of lipid oxidation and colour deterioration during aging were not affected by the dietary treatments. Conclusions The use of cold-pressed rapeseed cake as a lipid supplement in beef-steer diet improved the fatty acid profile of muscle fat without compromising meat oxidative stability, animal growth performance and carcass characteristics. Implications The supplementation of beef-steer diet with cold-pressed rapeseed cake could be an advantageous economical strategy allowing exploitation of an important by-product of small-scale biodiesel manufacturing to provide consumers with healthier meat.

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Fatty acid composition differences between adipose depot sites in dairy and beef steer breeds

Journal of Food Science and Technology ◽

10.1007/s13197-013-1117-5 ◽

2013 ◽

Vol 52 (3) ◽

pp. 1656-1662 ◽

Cited By ~ 3

Author(s):

T. Liu ◽

Z. M. Lei ◽

J. P. Wu ◽

M. A. Brown

Keyword(s):

Fatty Acid Composition ◽

Fatty Acid ◽

Acid Composition ◽

Adipose Depot ◽

Beef Steer

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Effect of chilling and subsequent storage at 20oC on electrolyte leakage and phospholipid fatty acid composition of tomato pericarp

Physiologia Plantarum ◽

10.1034/j.1399-3054.1993.870412.x ◽

1993 ◽

Vol 87 (4) ◽

pp. 522-527 ◽

Cited By ~ 1

Author(s):

M. Bergevin ◽

G. P. L'Heureux ◽

J. E. Thompson ◽

C. Willemot

Keyword(s):

Fatty Acid Composition ◽

Fatty Acid ◽

Acid Composition ◽

Electrolyte Leakage ◽

Phospholipid Fatty Acid ◽

Phospholipid Fatty Acid Composition ◽

Subsequent Storage

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Platelet Aggregation in Finnish Men and Its Relation to Fatty Acids in Platelets, Plasma and Adipose Tissue

Thrombosis and Haemostasis ◽

10.1055/s-0038-1660071 ◽

1985 ◽

Vol 54 (03) ◽

pp. 563-569 ◽

Cited By ~ 19

Author(s):

M K Salo ◽

E Vartiainen ◽

P Puska ◽

T Nikkari

Keyword(s):

Fatty Acids ◽

Adipose Tissue ◽

Fatty Acid Composition ◽

Fatty Acid ◽

Platelet Aggregation ◽

Acid Composition ◽

Saturated Fatty Acids ◽

Free Living ◽

Ω3 Fatty Acids ◽

Induced Aggregation

SummaryPlatelet aggregation and its relation to fatty acid composition of platelets, plasma and adipose tissue was determined in 196 randomly selected, free-living, 40-49-year-old men in two regions of Finland (east and southwest) with a nearly twofold difference in the IHD rate.There were no significant east-southwest differences in platelet aggregation induced with ADP, thrombin or epinephrine. ADP-induced platelet secondary aggregation showed significant negative associations with all C20-C22 ω3-fatty acids in platelets (r = -0.26 - -0.40) and with the platelet 20: 5ω3/20: 4ω 6 and ω3/ ω6 ratios, but significant positive correlations with the contents of 18:2 in adipose tissue (r = 0.20) and plasma triglycerides (TG) (r = 0.29). Epinephrine-induced aggregation correlated negatively with 20: 5ω 3 in plasma cholesteryl esters (CE) (r = -0.23) and TG (r = -0.29), and positively with the total percentage of saturated fatty acids in platelets (r = 0.33), but had no significant correlations with any of the ω6-fatty acids. Thrombin-induced aggregation correlated negatively with the ω3/6ω ratio in adipose tissue (r = -0.25) and the 20: 3ω6/20: 4ω 6 ratio in plasma CE (r = -0.27) and free fatty acids (FFA) (r = -0.23), and positively with adipose tissue 18:2 (r = 0.23) and 20:4ω6 (r = 0.22) in plasma phospholipids (PL).The percentages of prostanoid precursors in platelet lipids, i. e. 20: 3ω 6, 20: 4ω 6 and 20 :5ω 3, correlated best with the same fatty acids in plasma CE (r = 0.32 - 0.77) and PL (r = 0.28 - 0.74). Platelet 20: 5ω 3 had highly significant negative correlations with the percentage of 18:2 in adipose tissue and all plasma lipid fractions (r = -0.35 - -0.44).These results suggest that, among a free-living population, relatively small changes in the fatty acid composition of plasma and platelets may be reflected in significant differences in platelet aggregation, and that an increase in linoleate-rich vegetable fat in the diet may not affect platelet function favourably unless it is accompanied by an adequate supply of ω3 fatty acids.

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Health Benefits of Pumpkin Seed and Nutrition Profile of 35 Pumpkin Accessions

EDIS ◽

10.32473/edis-hs1312-2017 ◽

2017 ◽

Vol 2017 (6) ◽

Author(s):

Geoffrey M. Meru ◽

Yuqing Fu ◽

Dayana Leyva ◽

Paul Sarnoski ◽

Yavuz Yagiz

Keyword(s):

Fatty Acid Composition ◽

Fatty Acid ◽

Acid Composition ◽

Health Benefits ◽

Pumpkin Seed ◽

Production Practices

This article aims to summise production and nutrition aspects of pumpkin seed. Specifically, it focuses on health benefits of the seeds, production practices and provides data on the oil, protein and fatty acid composition of 35 pumpkin accessions.

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