Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/79456
COMPARTIR / EXPORTAR:
logo share SHARE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Predicting the content of polyunsaturated fatty acids and biohydrogenation products in subcutaneous fat of beef cows fed flaxseed by near infrared reflectance spectroscopy

AutorPrieto, Nuria CSIC; Dugan, M. E. R.; López Campos, Oscar CSIC; McAllister, T. A.; Aalhus, J. L.; Uttaro, B.
Fecha de publicaciónoct-2011
EditorCanadian Meat Science Association
CitaciónProceedings of the Canadian Meat Science Association Technical Symposium (2011)
ResumenToday, consumers are interested in fat composition as scientific evidence suggests that diets high in saturated fat are associated with an increased risk of cardiovascular disease. Techniques to quantify fatty acids (FA) in meat are costly and time-consuming. Near infrared reflectance spectroscopy (NIRS) is a rapid and non destructive method. The aim of this study was to examine the ability of NIRS to estimate the concentration of polyunsaturated FA and their biohydrogenation products in subcutaneous fat from cows fed flaxseed. Subcutaneous fat samples at the 12th rib of 62 cows were collected and stored at -80ºC. After thawing, 32 spectra from each intact sample were collected, then averaged, over a NIR spectral range from 400 to 2498 nm at 31ºC (warm samples) and 2ºC (cold samples), and then analyzed for FA profiles. NIRS calibrations on warm samples, tested by cross-validation, showed high predictability for most of the n-3 (R2: 0.81- 0.86; RMSECV: 0.11-1.56 mg·g-1 fat) and linolenic acid biohydrogenation products such as conjugated linolenic acids, conjugated linoleic acids (CLA), non-CLA dienes and trans-monounsaturated FA with R2 (RMSECV, mg·g-1 fat) of 0.85-0.85 (0.16-0.37), 0.84-0.90 (0.21-2.58), 0.90 (5.49) and 0.84-0.90 (4.24-8.83), respectively. When spectra were obtained from cold samples NIRS predictability was lower than that for warm samples, probably due to a less homogeneous distribution of fat throughout the cells and more air bubbles, or to reduced molecular vibration due to the cooler temperature. NIRS could discriminate 100% of subcutaneous fat samples from cows fed different diets (with or without flaxseed). These data support that NIRS has the potential to be used as a fast and accurate predictor of content of linolenic acid and its biohydrogenation products in subcutaneous fat of beef cows. Nevertheless, further studies are required to test its ability during on-line operations in an abattoir.
Descripción1 página.-- Proceedings of the Canadian Meat Science Association Technical Symposium (Halifax, Canadá, 6-7 octubre de 2011)
Versión del editorhttp://cmc-cvc.com/sites/default/files/files/CMSAabstracts2011.pdf
URIhttp://hdl.handle.net/10261/79456
Aparece en las colecciones: (IGM) Comunicaciones congresos

Ficheros en este ítem:
Fichero Descripción Tamaño Formato
Embargo. Digital.CSIC..pdf21,67 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

Page view(s)

244
checked on 29-mar-2024

Download(s)

60
checked on 29-mar-2024

Google ScholarTM

Check


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.