Merada Beslenen Siğirlarin Kesim Sonrasi Kemik Iliği Yağ Asit Kompozisyonu: Beslenmeye Uygulanmasi

Abstract

The objective of the present work was to investigate how grass feeding in cattle influences the fatty acid (FA) composition in marrow tissue. For a split plot designed experiment, marrow was obtained from the femur, humerus, radius and tibia of four crossbred steers slaughtered at 28 mo of age and fed o n mixture of cool season grasses and legumes. There were no bone type by location within bone interactions (P > 0.42), and the only within bone effect was for trans-vaccenic acid (TVA) where values for medial bone were lowest (P = 0.03) and highest for distal and proximal bone. Total monounsaturated FA and desaturation index were lower (P = 0.01) and total saturated FA were greater (P = 0.01) for proximal vs. distal bone marrow lipids. Marrow conjugated linoleic acid (CLA) was greater (P = 0.02) for distal bones (1.32 %) than for proximal bones (0.86 %). Overall, proportions of 18:3 n-3, CLA, and TVA were 0.60 %, 1.09 % and 2.50 %, respectively. We conclude that the FA profile of marrow in grass-fed cattle represents a healthy, nonatherogenic, animal-based fat source.

Keywords

• Bovine bone marrow, n-3 Fatty acids, Conjugated linoleic acid, Grass-fed cattle, Fatty acid composition

BONE MARROW FATTY ACID COMPOSITION IN GRASS-FED CATTLE AFTER SLAUGHTER: NUTRITIONAL IMPLICATIONS

Abstract

Bu çalışmanın amacı, merada beslenen sığırların kemik iliği yağ asidi (YA) kompozisyonunu nasıl etkilediğini araştırmak idi. Buğdaygil ve baklagil otlarından oluşan bir merada otlayan ve 28 aylık yaşta kesime gönderilen kısırlaştırılmış besi sığırlarından elde edilen femur, humerus, radius ve tibia kemik ilikleri split plot deneme düzeneğinde toplanmıştır. Kemik türü ve örnek alınan kemik bölgesi arasında interaksiyon tespit edilmemiş olup (P > 0,42), sadece trans-vaksenik asit (TVA) için örnek alınan kemik bölgelerde distal ve proksimal kemikler için en yüksek ve medail kemikler için en düşük (P = 0,03) değerler bulunmuştur. Proksimal kemik bölgelerindeki kemik iliğinde distal kemik bölgelerindekine oranla desaturasyon indeksi ve toplam tekli doymamış YA oranı daha düşük (P = 0,01) ancak total doymuş YA oranı daha fazla (P = 0,01) tespit edilmiştir. Distal kemik bölgelerindeki ilikte bulunan konjuge linoleik asit (CLA) proksimal bölgelerdeki iliklere oranla daha fazla bulunmuştur (P = 0,02, %0,86’e karşı %1,32). Genel olarak 18:3, n-3, CLA, TVA oranları sırasıyla %0,60, % 1,09 ve %2,50 olarak bulunmuştur. Çalışma sonuçlarına göre merada beslenen sığırların kemik iliğinde bulunan yağ asitlerinin sağlıklı, aterojenik olmayan hayvansal kaynaklı yağlar olduğu sonucuna varılmıştır

Keywords

• sığır kemik iliği, n-3 yağ asitleri, konjuge linoleik asit, merada beslenen sığır, yağ asidi kompozisyonu

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