• Korean journal of food and cookery science
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• v.23 no.2 s.98
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• pp.187-194
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• 2007

The quality characteristics of brand and non-brand Korean beefs, found in retail circulation, were studied via physicochemical and microbiological analysis and sensory tests. The average price of 100 g of brand Korean beef sirloin was 7.6 USD (1USD=950won), while the price of non-brand Korean beef was 3.1 USD. The fat content of the brand beef seemed to be higher, yet the difference was not significant. In both the brand and non-brand beefs, pH levels were approximately 5.27 We found that lightness (Hunter L value) tended to be higher in the brand beef, but again, this difference was not significant. For the cooked beef texture, the brand beef seemed to have lower gumminess, and had significantly less fracturability, than the non-brand beef. Significant differences could not be found with regards to microbiological stability between the two types of beef. In the raw beef sensory test, significant differences were identified for meat color, fat color, fat in muscle, flavor, and general preference. Also, the after cooking sensory test showed that brand beef had better characteristics for color, flavor, juiciness, softness, taste, chewiness, and preference.

• Food Science of Animal Resources
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• v.34 no.3
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• pp.339-345
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• 2014

This study was performed to develop a rapid immuno-assay kit, by using a specific antigen to detect Hanwoo brand meat. We selected a synthetic antigen specific to our target antibody, named BIO-TAG (Tyr-D-Ala-Phe), by utilizing a computer-based analysis and literature review. BIO-TAG tagged with adjuvant was subcutaneously injected in sheep and Hanwoo. The serum and meat juice of the immunized or non-immunized animal were then analyzed, to measure the titer of antibody by ELISA and Western blot. The amount of antibodies against the BIO-TAG increased (p<0.05) in serum by vaccination. Furthermore, meat juice from the immunized Hanwoo showed greater (p<0.05) antibody titer, compared with those from non-immunized groups. To optimze the dilution factor, we performed dot-ELISA, with various combination levels of BIO-TAG. Results from dot-ELISA showed that 2 mg/mL BIO-TAG was sufficient to distinguish the immunized meat from non-immunized groups. These results support our hypothesis that simple immunization of Hanwoo generates a sufficient amount of antibodies to be detectable in the meat juice by means of the immune-assay. Therefore, specific Hanwoo brand meat can be more precisely identified by our rapid diagnostic kit. This technology can deter possible fraud of counterfeit meat brands in the Korean domestic market with ease and rapidity; and offers a new tool that guarantees consumers high quality Hanwoo brand beef.