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Jumat, 14 Januari 2011

Broiler Quality

On-farm and ante mortem factors affecting broiler quality by Schneider, Brenda Lorraine, M.Sc., UNIVERSITY OF ALBERTA , 2009 , 149 pages; MR 53957   Abstract: Experiments were conducted to determine the effects of nutrition, temperature during feed withdrawal, shackling duration, sex and age at processing on broiler quality . Low energy (94 % of recommended) diets resulted in a lower percentage of carcass fat while increasing the percentage of carcass protein. Low protein (85 % of recommended) resulted in a decreased percentage of carcass protein while carcass fat increased. Low protein diets also limited frame size as measured by length and width of P. major . Exposure to 9 C temperatures during feed withdrawal resulted in improved meat quality as measured by higher ultimate pH, lower drip loss and darker color. Long shackling time (120 s) did not affect ultimate pH, drip or cooking losses compared to short shackling (<10 s); however, short shackled broilers exhibited poorer tenderness values. Males had higher carcass protein and lower fat than females. Females exhibited higher ultimate pH, higher drip loss and lighter breast meat. Drip loss and ultimate pH decreased with age. Processing age and sex of broilers may have greater influences on meat quality than previously reported.   Advisor: School: UNIVERSITY OF ALBERTA Source: MAI 48 /02 , p. , Apr 2010 Source Type: M.Sc. Subjects: Animal sciences Publication Number: MR 53957       Access the complete dissertation:   » Find an electronic copy at your library.   Use the link below to access a full citation record of this graduate work:   http://gateway.proquest.com/ openurl%3furl_ver=Z39.88-2004%26res_dat=xri: pqdiss%26rft_val_fmt=info:ofi/fmt:kev:mtx: dissertation%26rft_dat=xri:pqdiss:MR53957   If your library subscribes to the ProQuest Dissertations & Theses (PQDT) database, you may be entitled to a free electronic version of this graduate work. If not, you will have the option to purchase one, and access a 24 page preview for free (if available).       About ProQuest Dissertations & Theses With over 2.3 million records, the ProQuest Dissertations & Theses (PQDT) database is the most comprehensive collection of dissertations and theses in the world. It is the database of record for graduate research. The database includes citations of graduate works ranging from the first U.S. dissertation, accepted in 1861 , to those accepted as recently as last semester. Of the 2.3 million graduate works included in the database, ProQuest offers more than 1.9 million in full text formats. Of those, over 860 ,000 are available in PDF format. More than 60 ,000 dissertations and theses are added to the database each year. If you have questions, please feel free to visit the ProQuest Web site - http://www.il.proquest.com - or call ProQuest Hotline Customer Support at 1-800-521- 3042.Slamet_Fifin