Data/hora: 03/07/2024 15:10:02

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	03/07/2017	
Data da última atualização: 	03/07/2017	
Autoria: 	VAN CLEEF, E. H. C. B.; D'AUREA, A. P.; FAVARO, V. R.; CLEEF, F. O. S. V.; BARDUCCI, R. S.; ALMEIDA, M. T. C.; MACHADO NETO, O. R.; EZEQUIEL, J. M. B.	
Título: 	Effects of dietary inclusion of high concentrations of crude glycerin on meat quality and fatty acid profile of feedlot fed Nellore bulls.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Plos One, Illinois, v. 12, p. 1-17, 2017.	
Idioma: 	Inglês	
Conteúdo: 	Crude glycerin, the main by-product of biodiesel production, can replace dietary energy
sources, such as corn. The objective of this study was to evaluate the inclusion of up to 30%
of crude glycerin in dry matter (DM) of the total diets, and its effects on meat quality parameters
of feedlot Nellore bulls. Thirty animals (227.7 ± 23.8 kg body weight; 18 months old)
were housed in individual pens and fed 5 experimental diets, containing 0, 7.5, 15, 22.5 or
30% crude glycerin (DM basis). After 103 d (21 d adaptation) animals were slaughtered and
the Longissimus muscle was collected. The characteristics assessed were chemical composition,
fatty acid profile, cholesterol, shear force, pH, color, water-holding capacity, cooking
loss and sensory properties. The increasing inclusion of crude glycerin in the diets did
not affect the chemical composition of the Longissimus muscle (P > 0.10). A quadratic effect
was observed when levels of crude glycerin were increased, on the concentration of pentadecanoic,
palmitoleic and eicosenoic fatty acids in meat (P < 0.05), and on the activity of the
delta-9 desaturase 16 and delta-9 desaturase 18 enzymes (P < 0.05). The addition of crude
glycerin increased the gamma linolenic fatty acid concentration (P < 0.01), and altered the
monounsaturated fatty acids in Longissimus muscle of animals (Pquad. < 0.05). Crude glycerin
decreased cholesterol content in meat (P < 0.05), and promoted higher flavor score and
greasy intensity perception of the meat (P < 0.01). The inclusion of up to 30% crude glycerin
in Nellore cattle bulls`diets (DM basis) improves meat cholesterol and sensory attributes,
such as flavor, without affecting significantly the physical traits, the main fatty acid concentrations
and the chemical composition.	
Palavras-Chave: 	cattle; feedllot; glycerin; meat quality.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_39310.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
Exemplares: 	Epagri-Sede - (101304-1) - UPC - AP - DD -  -  -  - DIS