title: Effect of Quality Grade and Storage Time on the Palatability, Physicochemical and Microbial Quality of Hanwoo Striploin Beef.
abstract: The effects of quality grade and storage time on physicochemical, sensory properties and microbial population of Hanwoo striploin beef were investigated. After a total of 30 Hanwoo beef were slaughtered, the cold carcasses were graded by official meat grader at 24 h postmortem. The carcasses were categorized into five groups (quality grade 1++, 1+, 1, 2, and 3) and were vacuum-packaged and stored. The samples were kept for 1, 4, 6, 8, 11, 13, 15, 18, 20, 22 and 25 d for analyses. As the quality grade was increased, moisture, protein and ash contents decreased (p<0.05). Higher quality grade corresponded with higher fat contents. The shear force values decreased with increasing quality grade and showed decreases sharply during the first 4 d (p<0.05). pH, water holding capacity, cooking loss, and volatile basic nitrogen for grade 1++ groups were lower than for grade 3 (p<0.05). CIE L* and b* values increased as increased quality grade (p<0.05). Meat color decreased until 13 d and fluctuated after 15 d of storage (p<0.05). Regarding the sensory scores, higher quality grade corresponded with higher juiciness, tenderness, flavor, fatty and palatability scores (p<0.05). Generally, increased storage time for 15 d improved sensory scores attributes. Results indicate that a high quality grade could positively influence physicochemical and sensory properties.
authors.affiliation: Department of Health Administration and Food Hygiene, Jinju Health College, Jinju 660-757, Korea.
authors.forename: Dong-Gyun
authors.initials: DG
authors.lastname: Yim
authors.affiliation: Department of Animal Science and Biotechnology, Sangji University, Wonju 220-702, Korea.
authors.forename: Yu-Jin
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Animal Science and Biotechnology, Sangji University, Wonju 220-702, Korea.
authors.forename: Ku-Young
authors.initials: KY
authors.lastname: Chung
keywords: Hanwoo; microbial population; physicochemical trait; quality grade; sensory scores