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Asian-Australasian Journal of Animal Sciences 2007;20(4): 577-581.
DOI: https://doi.org/10.5713/ajas.2007.577    Published online January 24, 2007.
Effects of Intramuscular Fat on the Sensory Characteristics of M. longissimus dorsi in Japanese Black Steers as Judged by a Trained Analytical Panel
Toshiaki Okumura*, Kaoru Saito, Toshihiro Nade, Satsuki Misumi, Yasuhisa Masuda, Hironori Sakuma, Sachio Nakayama, Kazuhisa Fujita, Tadashi Kawamura
Correspondence:  Toshiaki Okumura,
Abstract
The effects of intramuscular fat on the sensory characteristics of M. longissimus dorsi in Japanese Black steers were investigated by a trained analytical panel (average 13.4 panelists). Five sets (10 head) of artificial identical twins were divided into 2 groups, high level of intramuscular fat group (HG) which utilized the fattening method of increasing intramuscular fat and low level of intramuscular fat group (LG) which did not use the above method. Regarding M. longissmus dorsi which was produced for use in the sensory evaluation, crude fat contents of HG and LG was 25.8% and 23.2% respectively (p<0.05). Warner-Bratzler shear force, water holding capacity, cooking loss and fatty acid composition of HG and LG were similar between the two groups. M. Longissimus dorsi taken from HG and LG were tested for their sensory characteristics by a trained panel. HG was given higher points for juiciness than LG (p<0.05). There were no significant differences for tenderness and flavor between the two groups. Overall acceptability which synthesized each of the sensory characteristics of HG and LG were 5.04 and 4.69 points respectively (p = 0.05). These results suggested that juiciness increased with the increase of intramuscular fat, and this raised the overall acceptability of M. longissimus dorsi.
Keywords: Intramuscular Fat; Sensory Evaluation; Japanese Black Steers; Juiciness
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